DE102009001256A1 - Fastening clamp, has frames connected with each other by clamping screws engaging with lugs of frames, where lugs forming clamping gap are arranged at acute angle in cross section to longitudinal axis of cylinder - Google Patents

Abstract

The clamp (1) has frames (5, 7) connected with each other by clamping screws (17) engaging with lugs (9, 11) of the frames. The frames are fixed at a cylinder (3) of a vibration damper, and a clamping gap (27) is provided between clamping surfaces (23, 25) of the lugs. The lugs forming the clamping gap are arranged at an acute angle (alpha) in a cross section to a longitudinal axis of the cylinder. The lugs of the frames are arranged diagonal to a lateral surface of the cylinder. The clamping surfaces exhibit an enclosed angle (gamma) of 90 degrees to each other.

Description

The The invention relates to a mounting clamp according to the The preamble of claim 1.

From the DE 44 24 992 C2 a fastening device for a vibration damper is known, which consists of two identical clamp halves. These clamp halves are welded to the cylinder tube of the vibration damper. By means of clamping screws, a wheel carrier can be mounted on the fastening device.

The DE 26 53 006 A1 discloses a suspension on a vibration damper, in which the wheel carrier forms a first shell of a clamp, which is fixed with a second shell by means of clamping screws.

One Wheel carrier, the cross-functional a shell forms the clamp, can be in particular casting only expensive to produce, since tight manufacturing tolerances are to be kept. For larger deviations occur in-cylinder voltage spikes that adversely affect the life affect the suspension. Consequently, the cast cup needs be post-machined. The same applies to wheel carriers, which are made by forging technology.

The Object of the present invention is a mounting clamp further develop such that waived a weld on the one hand and on the other hand, a cost-producible wheel carrier can be used.

According to the invention solved the problem by forming the clamping gap Tabs in cross section to the longitudinal axis of the cylinder considered in are arranged at an acute angle to each other.

about the tightening torque of the clamping screws are approximated to the tabs. The shell, whose tabs form the acute angle, targeted used on the cylinder.

extensive empires Investigations have shown that an angle smaller than 10 ° between the clamping surfaces for a very cheap Voltage curve within the components involved, namely the Bowls and the cylinder ensures.

deviant to the prior art, in which the tabs perpendicular to the lateral surface are arranged, extend the tabs of the first and the second Shell at an angle to the lateral surface of the cylinder. This embodiment also promotes nestling of the shells on the cylinder.

Especially in terms of control measurements in manufacturing it is advantageous if the clamping surfaces on the tabs of a Shell having an included angle of 90 ° to each other.

Of Further it has turned out that it is for the burden the shells is beneficial when placed on the lateral surface of the cylinder have a Umfassungswinkel of at least 160 °.

A Another measure to the voltage curve within the Mounting clamp cheap and on the other hand to minimize the manufacturing costs is that at least one of the shells in the contact area to the lateral surface of the Cylinder has at least one raised contact surface, which are calibrated. Also cast or forged bowls can with comparatively little effort to a defined diameter be refinished of the cylinder.

For example the contact surfaces are simply rewritten, so that you do without expensive post-processing can.

Based The following description of the figures is intended to illustrate the invention in more detail be explained.

It shows:

1 Cross-sectional view through the mounting clamp

2 Interior view of a cup

The 1 shows a cross section through a mounting clamp 1 on a cylinder 3 a vibration damper is mounted. The clamp 1 includes a first shell 5 and a second shell 7 where both shells 5 ; 7 , the lateral surface contour of the cylinder 3 are adjusted. On both shells 5 ; 7 , lugs go 9 ; 11 in which passages 13 . 15 for fastening means, preferably clamping screws 17 are executed. In synopsis with the 2 It can be seen that the tabs are parallel to the longitudinal axis 19 the Bowl 5 extend. Furthermore, in the 2 raised contact surfaces 21 shown on the outer surface of the cylinder 3 attached and calibrated for it. The shell can be made as a forming or casting. By means of an embossing process, the contact surfaces 21 produced without cutting.

clamping surfaces 23 ; 25 the tabs 9 ; 11 form according to 1 in cross section to the longitudinal axis of the cylinder 3 a clamping gap 27 , where the tabs 9 ; 11 with tensionless seat of the shells are arranged on the cylinder at an acute angle α to each other. The clamping gap 27 is at the outer edge of the tabs 9 ; 11 wider than at the inner edge in the area of the lateral surface of the cylinder. Preferably, the angle α should be less than 10 °.

The tabs 9 ; 11 the first and the second shell 5 ; 7 are not perpendicular to the lateral surface of the cylinder 3 arranged, but preferably extend obliquely to the lateral surface. Nevertheless, the shells on the lateral surface of the cylinder on a circumferential angle β of at least 160 °. In this particular case, both shells cover 5 ; 7 almost identical, each half the circumference of the cylinder 3 from.

The clamping surfaces 23 ; 25 at the tabs 9 ; 11 have an included angle γ of about 90 °. Such a measured angle can be checked by simple means. The clamping surfaces preferably form 25 the Bowl 7 that is forged or cast, the 90 ° angle while the tabs 9 the other shell 5 that z. B. designed as a sheet metal part, the contract for the acute angle of up to 10 °.

During assembly, the shells 5 ; 7 on the cylinder 3 created. Possibly. can the clamping screws 17 already in the passageways 13 ; 15 be used. Is the predetermined position of the mounting clamp 1 on the cylinder 3 set up, then the clamping screws 17 dressed. The clamping surfaces move 23 ; 25 the tabs towards each other and provide a bias of the shells 5 ; 7 on the lateral surface of the cylinder 3 , With increasing tightening torque of the clamping screws 17 reduces the acute angle α in the clamping gap 27 , The bowls nestle in the process 5 ; 7 on the cylinder 3 at. You can also provide that the diameter of a shell 5 . 7 is slightly larger than the diameter of the cylinder 3 , so that edge pressures at the base of the clamping area of a shell 5 to the clamping surfaces 23 the tabs 9 be minimized.

1

mounting clamp

3

cylinder

5

first Bowl

7

second Bowl

9; 11

tabs

13; 15

Through openings

17

turnbuckles

19

longitudinal axis

21

contact surfaces

23; 25

clamping surfaces

27

clamping gap

α

angle angle

γ

angle

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4424992 C2 [0002]
• - DE 2653006 A1 [0003]

Claims (6)

Mounting clamp ( 1 ), comprising a first shell ( 5 ) and a second shell ( 7 ), which have tabs ( 9 ; 11 ) of the shells ( 5 ; 7 ) through clamping screws ( 17 ) and on a cylinder ( 3 ), in particular a vibration damper, are fixed, wherein between clamping surfaces ( 23 ; 25 ) of the tabs ( 9 ; 11 ) a clamping gap ( 27 ), characterized in that the clamping gap ( 27 ) forming tabs ( 9 ; 11 ) in cross section to the longitudinal axis ( 19 ) of the cylinder ( 3 ) are viewed at an acute angle α to each other. Mounting clamp according to claim 1, characterized that the angle (α) is less than 10 °. Mounting clamp according to claim 1, characterized in that the tabs ( 9 ; 19 ) of the first and the second shell ( 5 ; 7 ) obliquely to the lateral surface of the cylinder ( 3 ) are executed. Mounting clamp according to claim 1, characterized in that clamping surfaces ( 23 ; 25 ) on the tabs ( 9 . 11 ) of a shell ( 5 ; 7 ) have an included angle (β) of 90 ° to each other. Mounting clamp according to claim 1, characterized in that the shells ( 5 ; 7 ) on the lateral surface of the cylinder ( 3 ) have a Umfassungswinkel (γ) of at least 160 °. Mounting clamp according to claim 1, characterized in that at least one of the shells ( 5 ; 7 ) in the contact region to the lateral surface of the cylinder ( 3 ) at least one raised contact surface ( 21 ) which are calibrated.