WO2009033386A1

WO2009033386A1 - Flexible coupling

Info

Publication number: WO2009033386A1
Application number: PCT/CN2008/071713
Authority: WO
Inventors: Tianfan Huang
Original assignee: Suzhou Fl Coupling Drive Engineering Co., Ltd
Priority date: 2007-09-12
Filing date: 2008-07-22
Publication date: 2009-03-19
Also published as: CN201083241Y

Abstract

A flexible coupling comprises two flanges (1), an intermediate portion (2) between the two flanges, and a linkage disc (3) connected to them. The intermediate portion includes a core shaft (4) and a multi-layer helical springs suite (5) enclosing the shaft. This coupling has a compact structure, good load-bearing ability, and strong compensation capability. It is economical and durable.

Description

Instruction manual Flexible coupling

Flexible coupling

[1] Technical field

[2] The present invention relates to a flexible coupling, and more particularly to a flexible coupling for use in the field of mechanical transmission.

[3] Background Art

[4] The iconic feature of the traditional universal coupling is "ten bytes". In operation, "ten bytes" rely on four needle bearings distributed in four directions to achieve alternating positive and negative rotations. The coupling has considerable angular displacement compensation and radial displacement compensation. The problem is that the universal coupling is swinging in a large angular direction. The transmission shaft in the middle of the two "ten bytes" must cooperate with the telescopic movement. The large frictional resistance of the spline surface in the dynamic expansion makes the telescopic movement of the coupling. It becomes very difficult, and the phenomenon of jamming often leads to serious accidents. However, if the ball joint type telescopic shaft is used instead of the universal joint of the spline telescopic shaft, the manufacturing cost is difficult to be accepted by the majority of users.

[5] Replacing the universal joint with "steel shaft" has a simple structure, light weight, no lubrication, strong cushioning and high reliability.

, low cost and other advantages. The large angle of the shaft of the steel wire shaft is far from the traditional joint of the universal joint, so it is widely used in the control system of high-precision equipment and even on the "hot end part" of the aircraft engine. However, the problem of the connection between the "wire flexible shaft" and the flange has not been properly solved, which is a serious cause of the serious obstacle to the expansion of the "steel shaft" for high-speed, heavy-duty equipment flexible couplings.

[6] Hardened toothed drum gear couplings and flexible discs and plate couplings are considered suitable for high speed and heavy load applications. However, the application of hardened toothed drum gear couplings relies on thin oil circulation lubrication cooling. The cooperation of the system, leaving the circulating lubrication cooling system, there is a risk of tooth surface bonding in the gear coupling under high speed or high speed conditions. Including the cost of a thin oil circulation lubrication system, the price of a hard-toothed drum gear coupling is more than ten times that of a conventional soft-toothed gear coupling. In addition, the "zero buffer" capability is still the fatal demise of the high-priced hard-toothed drum gear coupling.

[7] Traditional diaphragm couplings are considered to be a lightweight, lubrication-free alternative to hard-toothed drum gear couplings. However, in practice, a series of contradictions of traditional diaphragm couplings are constantly exposed: Coupling bearing The contradiction between the load capacity and the displacement compensation capability is very prominent. The contradiction between the radial displacement compensation of the diaphragm coupling and the axial displacement compensation is the contradiction of the material limited micro-variable. Also very prominent.

[8] The number of holes on the annular diaphragm is proportional to the bearing capacity, and inversely proportional to the compensation capacity. The uncoordinated contradiction between the bearing capacity and the compensation capacity leads to the high-speed and heavy-load annular diaphragm coupling in the user field application. There have been repeated "burning tile" accidents, which makes the coupling designers difficult and unable to do anything.

[9] Summary of the invention

[10] The purpose of the utility model is to provide a flexible coupling, the core component of which is composed of a multi-layer spiral elastic sleeve layer embedded on a mandrel, which has the advantages of particularly compact size, large carrying capacity and large compensation capacity. Strong buffering, no lubrication, high temperature resistance, convenient on-site assembly and disassembly, sturdy work and economical and durable.

[11] The technical solution of the present invention is: a flexible coupling comprising two flanges, an intermediate portion between the two flanges, and a linkage plate connecting the flange and the intermediate portion, the intermediate portion A multi-layer spiral elastic kit comprising a mandrel and a nested outer layer of the mandrel.

[12] A further technical solution of the utility model is:

[13] A flexible coupling comprising two flanges, an intermediate portion between the two flanges, and a linkage plate connecting the flange and the intermediate portion, the intermediate portion including the mandrel and the core a multi-layer spiral elastic kit in which the outer layer of the shaft is nested; the spiral direction of the adjacent two layers of the multi-layer spiral elastic sleeve is opposite; the spiral elasticity of the even layer adjacent to the inner layer of the odd-numbered layer spiral elastic suite There is a significant radial gap between the kits; the multi-layer spiral spring kit may be a multi-head coil spring tube set, a multi-head coil spring group, or a multi-layer combination of a multi-head coil spring tube and a multi-head coil spring; The multi-headed spiral spring tube comprises a composite spiral spring tube, and a left-handed spring tube and a right-handed spring tube, wherein the left-hand coil spring tube and the cylindrical joint surface at the two ends of the right-handed spring tube have an interference fit, and the middle portion other than the joint surface There is obvious radial clearance between them. There are several riding screw holes and riding positioning pin holes on the interference fit surface at both ends. The composite coil spring tube is combined with the interlocking discs on both sides to locate the joint. Positioning, fastening with a rivet screw; the multi-headed coil spring is in the outermost cymbal, and the wire ends of the ends of the multi-headed coil spring are folded 90 degrees in a spoke shape, and then clamped to the outer cymbal of the outer cymbal, The chuck and the linkage disc are positioned by the positioning pin and fastened by screws; the multi-head coil spring is in the inner layer, and the wire ends of the first and second ends are parallel to the axis of the cylindrical coil spring, and pass through the corresponding matching holes on the linkage plate. And tightened with a nut; the multi-layer spiral elastic kit A metal flexible tube may also be included, which is located at the outermost layer of the multi-layer spiral elastic package; the metal flexible tube is a thick-walled seamless metal tube having channels of the same depth of cut at the same distance, The channel is perpendicular to the axis, and each channel is rotated through the radial direction by 90 degrees with respect to the previous channel; the mandrel may be an alloy steel elastic drive shaft, which may be a standard steel flexible shaft, may be a cylinder The coil spring can also be hollow, wherein the alloy steel elastic transmission shaft and the standard steel flexible shaft are matched with the linkage plates on both sides by a rectangular key or other key connection.

A more detailed technical solution of the present invention is: a flexible coupling comprising two flanges, an intermediate portion between the two flanges, and a linkage plate connecting the flange and the intermediate portion, the intermediate portion The utility model comprises a mandrel and a multi-layer spiral elastic sleeve wrapped around the outer layer of the mandrel; the spiral spiral elastic kit has opposite spiral directions in two adjacent layers; and the inside and outside, the odd-numbered layer spiral elastic kit and the inner layer thereof There is a significant radial gap between adjacent layer spiral elastic sets of layers; the multi-layer spiral elastic set may be a multi-headed coil spring tube set, or a multi-head coil spring set, or a multi-headed coil spring tube and a multi-headed spiral a multi-layer combination of springs; each of the left-handed coil spring tubes and the right-handed spring tube constitutes a composite coil spring tube, and between the cylindrical joint surfaces of the left-hand coil spring tube and the right-handed spring tube The interference fit has obvious radial clearance between the middle sections except the joint surface, and the interference fit faces on both ends are distributed with several riding screw holes and riding positioning pin holes, and the composite spiral spring tube and two The side of the interlocking disc is combined with the locating pin, and is fastened by the riding screw; the multi-headed coil spring is in the outermost cymbal, and the wire ends at the ends of the multi-headed coil spring are turned 90 degrees in a spoke shape, a chuck that is fastened to its outer cymbal, the chuck and the interlocking disc are positioned by a positioning pin and fastened by screws; the multi-headed coil spring is in an inner layer, and the wire ends of the first and second ends are parallel to the shaft and pass through Cooperating with a corresponding mating hole on the disc and fastening with a nut; the multi-layer spiral elastic kit may further comprise a metal flexible tube located at an outermost layer of the multi-layer spiral elastic sleeve; the metal flexible tube is thick-walled a seamless metal tube having channels of the same depth of cut at equal distances, said channels being perpendicular to the axis, and each channel being rotated 90 degrees radially with respect to its previous channel; The mandrel can be an alloy steel elastic transmission shaft, which can be a standard steel flexible shaft, a cylindrical coil spring or a hollow, wherein the alloy steel elastic transmission shaft and the standard steel flexible shaft are connected by a rectangular key or other key connection. On both sides The linkage plate is matched; the linkage plate is a porous adapter plate, and is provided with a rectangular key hole, a positioning pin hole, a screw hole and a bolt hole; the flange is mounted on the mounting side of the flange An oil cup, an oil storage chamber and an oil guiding hole are arranged on the linkage plate; the flexible coupling is in a multi-layer screw The outer periphery of the rotating elastic kit is also provided with a jacket which is a metal bellows or a combined sealing device which is formed by laminating a composite sealing ring, a sealing jaw and a wave spring.

[15] The advantages of the utility model are:

[16] 1. The utility model participates in the torque transmission of the coupling without any exception due to all the elastic components in the middle part and the inner part. The space utilization rate is the highest, the radial dimension is the smallest, and the tangent of the coupling under the high speed condition. Speed, weight and moment of inertia are much smaller than traditional mainstream couplings; load capacity, torsional vibration damping capacity, cushioning, axial expansion and disability accessibility, and compensation capacity are much stronger than traditional mainstream couplings; Self-lubricating, high temperature resistance, dynamic balance, free assembly and maintainability and economy are all superior to traditional flexible couplings.

[17] 2. The outermost layer of the multi-layer spiral elastic kit of the utility model is a metal flexible pipe, which has high transmission precision, compact size, small weight, moment of inertia and tangential speed, synchronism of transmission, self-lubrication The bearing capacity and compensation capacity under the condition of high speed and high speed are better than those of the disc and piece flexible coupling.

[18] 3. The outermost layer of the multi-layer spiral elastic kit of the utility model is a multi-head helical spring 吋, which has much smaller weight and moment of inertia than the conventional cross shaft uniaxial coupling, and has a load bearing capacity and a twisting capacity. Vibration damping capacity, cushioning, axial elastic expansion, angular oscillation, radial compensation, free assembly maintainability and economy are all superior to traditional cross shaft universal couplings.

[19] BRIEF DESCRIPTION OF THE DRAWINGS

[20] FIG. 1 is a schematic structural view of a first embodiment of a flexible coupling;

[21] FIG. 2 is a schematic structural view of a second embodiment of a flexible coupling;

[22] FIG. 3 is a schematic structural view of a third embodiment of a flexible coupling;

[23] FIG. 4 is a partial structural view of a fourth embodiment of a flexible coupling;

[24] Figure 5 is a schematic view of a composite coil spring tube;

[25] Figure 6 is a schematic diagram of the left spiral spring tube;

[26] Figure 7 is a schematic view of the right spiral spring tube;

[27] Figure 8 is a schematic view of a spoke-type multi-head helical spring at both ends;

[28] Figure 9 is a side view of a spoke-type multi-head helical spring at both ends;

[29] Figure 10 is a schematic view of the intermediate layer multi-head helical spring;

[30] Figure 11 is a side view of the intermediate layer multi-head helical spring; [31] Figure 12 is a schematic view showing the structure of a metal flexible pipe;

[32] Figure 13 is a cross-sectional view showing the structure of a metal flexible pipe;

[33] Figure 14 is a schematic view showing the structure of an alloy steel elastic transmission shaft;

[34] Where: 1 flange;

2 intermediate part; 3 linkage plate; 4 core shaft; 5 multi-layer spiral elastic sleeve; 6 multi-head spiral spring tube; 7 multi-head coil spring; 8 metal flexible tube; 9 chuck; 10 positioning pin; 11 screw; 13 jacket; 14 spring pad 15; 15 horizontal keys; 16 stop pad 17; 17 bolts; 18 compression springs; 31 oil storage chamber; 32 oil guiding holes; 41 alloy steel elastic transmission shaft; 42 standard steel flexible shaft; Coil spring; 44 rectangular key;

61 left spiral spring tube; 62 right-hand spring tube; 63 composite coil spring tube; 81 channel; 101 oil cup; 631 riding screw; 632 riding stitching pin; 633 riding screw hole; 634 riding seam positioning pin hole.

[35] Specific implementation:

[36] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[37] Embodiment: As shown in FIGS. 1 to 14, a flexible coupling includes two flanges 1, an intermediate portion 2 between the two flanges 1, a connecting flange 1 and an intermediate portion 2 a linkage plate 3, and a spring pad 14 for twisting, connecting, fixing, limiting, loosening, a horizontal key 15, a stop pad 16, a bolt 17, etc., the intermediate portion 2 including a mandrel 4 and A multi-layer spiral elastic kit 5 coated on the outer layer of the mandrel 4 is nested.

[38] The spiral direction of the adjacent two layers of the multi-layer spiral elastic kit 5 is opposite; there is a significant radial gap between the odd-numbered spiral elastic suites of the odd-numbered layer and the inner layer adjacent to the inner layer. .

[39] The multi-layer spiral elastic kit 5 may be a multi-headed coil spring tube 6 or a multi-head coil spring 7 group, or a multi-layer combination of a multi-head coil spring tube 6 and a multi-head coil spring 7.

[40] The multi-head coil spring tube 6 each of the left coil spring tube 61 and the right-hand spring tube 62 constitutes a composite coil spring tube 63, and the cylindrical joint faces of the left-hand coil spring tube 61 and the right-hand spring tube 62 are There is an interference fit between the middle sections of the joint surface, and there are a plurality of joint screw holes 633 corresponding to the staking screws 631 and the staking pins ₆₃₂ and the positioning of the spurs on the interference fit surfaces at both ends. The pin hole 634, the composite coil spring tube 63 is combined with the interlocking discs 3 on both sides, is positioned by the locating pin 632, and is fastened by the rivet screw 631.

[41] The multi-headed coil spring 7 is in the outermost layer, and the wire ends of the ends of the multi-headed coil springs 7 are folded in a spoke shape outwardly by 90 degrees, and then clamped to the outer casing of the chuck 9, the chuck 9 Positioning with the linkage pin 3 with the positioning pin 10, And tightened by the screw 11; the multi-headed coil spring 7 is in the inner layer 吋, the wire ends of the first and last ends are parallel to the axis of the cylindrical coil spring, and pass through the corresponding matching holes on the linkage plate 3, and are fastened by the nut 12 .

The multi-layer spiral elastic kit 5 may further comprise a metal flexible tube 8, which is located at the outermost layer of the multi-layer spiral elastic kit 5.

[43] The metal flexible tube 8 is a thick-walled seamless metal tube having channels 81 of the same depth of cut at the same distance, the channel 81 being perpendicular to the axis, and each channel being opposite to the same The previous channel is rotated radially through 90 degrees.

[44] The mandrel 4 may be an alloy steel elastic transmission shaft 41, which may be a standard steel wire flexible shaft 42, may be a cylindrical spiral spring 43, or may be hollow, wherein the alloy steel elastic transmission shaft 41 and the standard steel flexible shaft 42 The rectangular spring 44 or other key connection forms cooperate with the interlocking discs 3 on both sides, and the outer circumference of the rectangular key 44 can also be sleeved with a compression spring 18.

[45] The interlocking disc 3 is a porous adapter disc, which is provided with a rectangular keyhole, a positioning pin hole, a screw hole and a bolt hole, etc., and the interlocking disc 3 is assembled through a series of holes thereon. The torque transmitted from the elastic member is transmitted to the adjacent flange 1 through the positioning pin and the bolt on the periphery of the interlocking disc 3.

[46] The mounting side of the flange 1 is provided with a needle valve type oil filling cup 101, and the interlocking plate 3 is provided with an oil reservoir 31 and an oil guiding hole 32.

[47] The flexible coupling is further provided with a jacket 13 on the periphery of the multi-layer spiral elastic kit 5, which is a metal bellows or a combined seal formed by a composite seal ring, a seal cymbal and a wave spring. Device.

[48] In most cases, the flexible coupling does not require lubrication, but when the coupling is used for universal joint transmission, the long neck ratio is relatively large, and the coupling is required to provide large angular and radial displacement compensation. The ointment self-lubricating device disposed in the coupling can be used to inject the grease into the oil storage chamber 31 by the needle valve type oil filling cup 101, and the grease is supplied to the elastic component of the coupling through the oil guiding hole 32. . In order to maintain this lubrication condition, it is necessary to provide a sealed jacket 13, such as a metal bellows or a combined seal.

[49] First Embodiment:

[50] As shown in FIG. 1, the intermediate portion 2 of the flexible coupling is respectively composed of an alloy steel elastic transmission shaft 41 and a three-layer multi-head helical spring 7 and a two-layer multi-head helical spring tube which are sequentially coated on the outer periphery thereof. The composition of the coil spring tube 6 is further provided with a metal bellows. The alloy steel elastic transmission shaft 41 is connected to the interlocking disc 3 by a rectangular key 44, and a compression spring _{18 is} further disposed on the outer periphery of the rectangular key ₄₄ . [51] This type of flexible coupling is a flexible coupling, which is characterized by the fact that all the elastic elements in the elastic assembly are involved in the torque transmission of the coupling without exception. The highest utilization rate and the smallest radial dimension. The tangential speed, weight and moment of inertia of the coupling are much smaller than those of the traditional mainstream coupling under high speed conditions; bearing capacity, torsional vibration damping capacity, cushioning, axial expansion and disability, The compensation capacity is much stronger than the traditional mainstream coupling; the lubrication-free self-lubricating, high temperature resistance, dynamic balance, free assembly and maintainability and economy are all superior to the traditional flexible coupling.

[52] Second embodiment:

[53] As shown in FIG. 2, the intermediate portion 2 of the flexible coupling is respectively composed of a standard steel flexible shaft 42 and a two-layer multi-headed coil spring 7 and a two-layer multi-headed coil spring tube 6 which are sequentially coated on the outer periphery thereof. The utility model is composed of a metal flexible tube 8; the standard steel flexible shaft 42 is connected to the interlocking disc 3 by a rectangular key 44, and a compression spring 18 is further disposed on the outer periphery of the rectangular key 44.

[54] This type of flexible coupling substantially retains the outstanding advantages of the coupling described in the first embodiment, except that it has poor cushioning and high transmission accuracy, and is particularly compact in size, weight, The moment of inertia and the tangential speed are much smaller. The synchronism of the transmission, the self-lubricating property, the bearing capacity under high speed conditions, and the compensation ability are all better than the disk and the flexible coupling.

[55] Third embodiment:

[56] As shown in FIG. 3, the intermediate portion 2 of the flexible coupling is respectively composed of a cylindrical coil spring 43 and a five-layer multi-headed coil spring 7 which is sequentially coated with its outer periphery layer by layer, wherein the outermost multi-head spiral The wire ends at the ends of the spring 7 are folded in a spoke shape 90 degrees outward, and then clamped to the outer casing of the chuck 9, the chuck 9 and the interlocking plate 3 are positioned by the positioning pin 10, and fastened by screws 11; The outermost periphery of the intermediate portion 2 is further provided with a combined sealing device which is formed by laminating a composite sealing ring, a sealing jaw and a wave spring.

[57] This type of flexible coupling is an elastic universal joint which, in addition to retaining the outstanding advantages of the coupling described in the first embodiment, is adapted to the needs of the universal joint. The axial dimension of the elastic component has to be multiplied, so that the critical speed value is reduced and cannot be applied at very high speeds; however, the advantages compared with the conventional cross-shaft coupling without cushioning are outstanding: The moment of inertia is much smaller, and the bearing capacity, torsional vibration damping capacity, cushioning, axial expansion, angular oscillation, radial compensation, free assembly maintainability and economy are all superior to the traditional cross shaft universal joint. Shaft.

[58] Fourth embodiment: [59] As shown in FIG. 4, the intermediate portion 2 of the flexible coupling is respectively composed of a mandrel 4 and a four-layer multi-headed coil spring tube 6 which is sequentially coated on the outer circumference thereof, and the middle portion of the mandrel 4 is, both ends of the cylindrical helical springs 43 of the coil spring ₄₃ as an elastic steel drive shaft 41, the mandrel 44 with 4 rectangular bond linkage connecting plate 3, and the outer periphery of the rectangular key ₄₄ is also provided with a compression spring 18.

[60] This type of flexible coupling is called a flexible coupling and has the features of the flexible coupling described in the first embodiment.

[61] In summary, the core component of the utility model is composed of a multi-layer spiral elastic kit layer embedded on a mandrel, and has the advantages of particularly compact size, large carrying capacity, large compensation capacity, strong cushioning, no lubrication, and resistance. High temperature, convenient on-site assembly and disassembly, sturdy work and economical and durable advantages.

Claims

Claim

1 . A flexible coupling comprising two flanges (1), an intermediate portion (2) between two flanges (1), and a flange (1) and an intermediate portion (2), respectively The interlocking disc (3) is characterized in that: the intermediate portion (2) comprises a mandrel (4) and a multi-layer spiral elastic sleeve ( ₅ ) wrapped around the outer layer of the mandrel (4).

2. The flexible coupling according to claim 1, wherein: the multi-layer spiral elastic sleeve (5) has opposite spiral directions in two adjacent layers; There is a significant radial gap between the even-numbered layer spiral elastic sets adjacent to the inner layer.

The flexible coupling according to claim 1, wherein: the multi-layer spiral elastic sleeve (5) is a multi-head helical spring tube (6) group or a multi-head helical spring (7) group. , or a multi-layer combination of a multi-start coil spring tube ( ₆ ) and a multi-head coil spring ( ₇ ).

4. The flexible coupling according to claim 3, wherein: the multi-head helical spring tube

(6) Each of the left coil spring tube (61) and the right-hand spring tube (62) constitutes a composite coil spring tube 63), and the cylindrical combination of the left spiral spring tube (61) and the right-hand spring tube (62) There is an interference fit between the faces, and there is a significant radial gap between the middle sections except the joint faces. There are several riding screw holes (633) and the locating pin holes (634) on the interference fit faces at both ends. The spring tube (63) is combined with the linkage plates (3) on both sides and is positioned with the locating pin (632) and fastened with the rivet screw (631).

The flexible coupling according to claim 3, wherein: the multi-start coil spring (7) is in the outermost cymbal, and the wire ends at the ends of the multi-start coil spring (7) are turned into a spoke-like shape. After folding 90 degrees, the chuck (9) is fastened to its outer casing, and the chuck (9) and the linkage plate (3) are used as positioning pins.

(10) Positioning and tightening with screws (11); the multi-start coil spring (7) is in the inner layer, and the wire ends at the ends of the ends are parallel to the axis of the cylindrical coil spring and pass through the linkage plate (3) Corresponding mating holes and fastened with nuts (12).

The flexible coupling according to claim 1, characterized in that: the multi-layer spiral elastic sleeve (5) further comprises a metal flexible tube (8) located in the multi-layer spiral elastic sleeve (5) The outermost layer is fixed to the linkage plate (3) by the positioning pin (10) and the screw (11).

The flexible coupling according to claim 6, wherein: said metal flexible tube (8) a thick-walled seamless metal tube having channels (81) of the same depth of cut at the same distance, the channels (81) being perpendicular to the axis, and each channel being along the metal relative to its previous channel The circumferential surface of the flexible tube (8) is rotated 90 degrees along the needle.

8. The flexible coupling according to claim 1, wherein: the mandrel (4) is an alloy steel elastic transmission shaft (41), which can be a standard steel flexible shaft (42), which can be a cylinder The coil spring (4 3) can also be hollow, wherein the alloy steel elastic transmission shaft (41) and the standard steel flexible shaft (42) are connected by a rectangular key (44) or other key connection form and the linkage plates on both sides (3) Match.

The flexible coupling according to claim 1, characterized in that: the mounting edge of the flange (1) is provided with a needle valve type oil filling cup (101), and the linkage plate (3) An oil reservoir (3 1) and an oil guide hole (32) are provided.

10. The flexible coupling according to claim 1, wherein: the flexible coupling is further provided with a jacket (13) on the periphery of the multi-layer spiral elastic sleeve (5), which is a metal corrugation A combined sealing device consisting of a composite sealing ring, a sealing jaw and a wave spring.