Dustproof plate tightening and fixing tool

Abstract

The utility model discloses a dustproof plate tightening and fixing tool which comprises a supporting frame, an air cylinder, a conical pulling shaft and an expansion sleeve. The supporting frame is provided with a through hole, and the outer wall of the conical pulling shaft is of a conical structure. The air cylinder comprises a cylinder body and a telescopic rod, the cylinder body is fixedly connected with the bottom face of the supporting frame, the end of the telescopic rod is fixedly connected with the small head end of the tapered pull shaft, and the large head end of the tapered pull shaft penetrates through a through hole of the supporting frame. The expansion sleeve is sleeved on the outer ring of the conical pull shaft, and the bottom end of the expansion sleeve is fixedly connected to the through hole of the support frame. According to the dustproof plate tightening and fixing tool, the expansion sleeve is expanded outwards through the driving air cylinder, so that an inner ring of a brake caliper support is clamped, a workpiece can be prevented from moving in the dustproof plate tightening process, and the dustproof plate tightening and fixing tool can be compatible with production lines of various vehicle types.

Description

Technical Field

[0001] The utility model relates to the technical field of rear suspension assembly tooling, in particular to a dustproof plate tightening and fixing tooling. Background Art

[0002] The assembly process of the rear suspension assembly includes the process of assembling and tightening the dust shield and the brake caliper bracket. In the assembly process of the dust shield and the brake caliper bracket, three bolts need to be inserted through the corresponding screw holes of the dust shield and the brake caliper bracket and tightened. The existing process mainly uses the bolt mounting holes of the brake caliper bracket for positioning, and uses the positioning pins and tooling for positioning, and then installs and tightens the dust shield. However, in actual production, the assembly production line needs to be compatible with a variety of vehicle models. There are differences between the dust shield and the brake caliper bracket. When the hole spacing of the vehicle model is different, the positioning pins and the bolt mounting holes cannot match, resulting in the failure of the tooling fixing function. Affected by the direction of the bolt torque, the reaction force during the tightening process will cause the workpiece to shift. At the same time, there is interference between the positioning pins and the dust shield, resulting in bumps and scratches on the dust shield. At present, the main technical means to solve this problem is to use an angle cylinder or a lever cylinder to limit and tighten one side of the brake caliper bracket, but there are differences in the brackets of different models. The cylinder position needs to be adjusted frequently when switching between models, and even incompatibility still occurs. In addition, the use of angle cylinders / lever cylinders requires installation position requirements. When the dust shield is divided into left and right, the dust shield is symmetrical on the left and right, and the cylinder has no compatible position to press the workpiece. Utility Model Content

[0003] In response to the above problems, the utility model provides a dustproof plate tightening and fixing tool, which aims to solve the problem that the tooling in the prior art has poor compatibility in production lines of various vehicle models. When the hole spacing sizes of the vehicle models are different, the traditional locating pins and locating holes cannot cooperate, resulting in failure of the fixing function of the tooling and displacement of the workpiece during the tightening process. At the same time, there is interference between the locating pins and the dustproof plate, resulting in problems such as bumps and scratches on the dustproof plate.

[0004] The utility model adopts the following technical solutions to achieve the above purpose:

[0005] A dustproof plate tightening and fixing tool comprises a support frame, a cylinder, a tapered pull shaft, and an expansion sleeve; the top surface of the support frame is provided with a through hole, and the outer wall of the tapered pull shaft is a conical structure; the cylinder comprises a cylinder body and a telescopic rod, the cylinder body is fixedly connected to the bottom surface of the support frame, the end of the telescopic rod is fixedly connected to the small end of the tapered pull shaft, and the large end of the tapered pull shaft passes through the through hole of the support frame; the expansion sleeve is arranged on the outer ring of the tapered pull shaft, and the bottom end is fixedly connected to the through hole of the support frame.

[0006] The working principle of this technical solution is to pull down the tapered shaft through the telescopic rod of the cylinder. Since the expansion sleeve itself is elastic, when the tapered shaft is pulled down, the conical surface of the tapered shaft causes the expansion sleeve to expand outward, thereby clamping the inner ring of the brake caliper bracket; the fixed structure of this technical solution can prevent the workpiece from shifting during the tightening of the dustproof plate, and at the same time avoid interference between the locating pin and the dustproof plate. Compared with the traditional bolt positioning method, it can be compatible with the production lines of various models.

[0007] A further technical solution is to further include a cover plate sleeved on the outer ring of the expansion sleeve, the cover plate being fixed to the top surface of the support frame and cooperating with the top surface of the support frame to clamp the bottom end of the expansion sleeve. In this technical solution, the bottom end of the expansion sleeve is fixed by using the cover plate, which facilitates the installation, maintenance and replacement of the expansion sleeve.

[0008] A further technical solution is that the inner wall of the expansion sleeve is a tapered structure that matches the outer wall of the tapered pull shaft. In this technical solution, the matching tapered structure enables the tapered pull shaft and the expansion sleeve to form a taper match, thereby increasing the service life of the expansion sleeve.

[0009] A further technical solution is that the outer wall of the big end of the tapered pull shaft is provided with a limit step that matches the top of the expansion sleeve. In this technical solution, the limit step matches the top surface of the expansion sleeve to limit the expansion sleeve travel and prevent the expansion sleeve function from failing.

[0010] A further technical solution is that the support frame is also provided with a positioning pin protruding from its top surface. In this technical solution, the positioning pin is matched with the positioning hole on the brake caliper bracket. When the expansion sleeve fails, the expansion sleeve can also be used as another positioning pin to position the workpiece through the two pins.

[0011] A further technical solution is to further include a photoelectric switch fixed on the top surface of the support frame, wherein the photoelectric switch is connected to the cylinder signal. The brake caliper bracket is pre-installed on the workbench, and after the photoelectric switch recognizes the part, the cylinder receives the signal and pulls back downward to fix the inner ring of the brake caliper bracket.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a dust shield plate tightening and fixing tool, which drives the cylinder to pull down the tapered pull shaft. The tapered surface of the tapered pull shaft causes the expansion sleeve to expand outward, thereby clamping the inner ring of the brake caliper bracket. This can prevent the workpiece from shifting during the tightening of the dust shield plate, and at the same time avoid interference between the traditional positioning structure and the dust shield. Compared with the traditional bolt positioning method, it can be compatible with the production lines of various models. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the dustproof plate tightening and fixing tooling of the utility model.

[0015] Figure 2It is a cross-sectional view of the tooling for tightening and fixing the dustproof plate described in the utility model.

[0016] Figure 3 : A cross-sectional view of the tooling for fixing the brake caliper bracket of the utility model.

[0017] Figure 4 : A schematic structural diagram of the brake caliper bracket of the utility model.

[0018] Figure 5 : A schematic diagram of the structure of the dustproof plate of the utility model.

[0019] Figure 6 : A schematic diagram of the structure in which the dustproof plate of the utility model is installed on the brake caliper bracket.

[0020] In the figure:

[0021] 1. Support frame; 10. Through hole; 11. Support leg; 21. Cylinder body; 22. Telescopic rod; 23. First fastening bolt; 24. Second fastening bolt; 3. Tapered pull shaft; 31. Limit step; 4. Expansion sleeve; 5. Cover plate; 51. Third fastening bolt; 6. Locating pin; 7. Photoelectric switch; 8. Brake caliper bracket; 80. Inner ring; 81. Threaded hole; 9. Dustproof plate; 91. Fixing bolt. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 6 The present invention is described in detail with specific implementation modes. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0023] like Figures 1 to 6 As shown, this embodiment provides a dust plate tightening and fixing tool, and the dust plate 9 needs to be fixedly installed in the threaded hole corresponding to the brake caliper bracket 8 by fixing bolts 91, such as Figures 4 to 6 As shown, the fixing fixture of this embodiment is used to fix the brake caliper bracket 8 during the installation of the dustproof plate 9, and the fixing fixture includes a support frame 1, a cylinder, a tapered shaft 3, and an expansion sleeve 4; the top surface of the support frame 1 is provided with a through hole 10, and the outer wall of the tapered shaft 3 is a conical structure; the cylinder includes a cylinder body 21 and a telescopic rod 22, the cylinder body 21 is fixedly connected to the bottom surface of the support frame 1, the end of the telescopic rod 22 is fixedly connected to the small end of the tapered shaft 3, and the large end of the tapered shaft 3 passes through the through hole 10 of the support frame 1; the expansion sleeve 4 is sleeved on the outer ring of the tapered shaft 3, and the bottom end is fixedly connected to the through hole 10 of the support frame 1;

[0024] Specifically, the support frame 1 includes a top plate and legs 11 supported on both sides of the top plate, the through hole 10 is opened on the top plate, the expansion sleeve 4 is specifically a rubber sleeve, and its bottom end is fixedly connected to the through hole 10 of the support frame 1 through the cover plate 5, and the cover plate 5 is also provided with a through hole adapted to the through hole 10. The cover plate 5 is sleeved on the outer ring of the expansion sleeve 4 through its through hole, and is fixedly connected to the support frame 1 through the third fastening bolt 51. Under the action of the third fastening bolt 51, the cover plate 5 and the top plate of the support frame 1 clamp the bottom end of the expansion sleeve 4; the cylinder 21 fixes its cylinder body to the bottom end of the top plate of the support frame 1 through the first fastening bolt 23, and drives its telescopic rod 22 to extend or retract through the air pump. The end of the telescopic rod 22 is specifically fixedly connected to the small end of the tapered pull shaft 3 through the second fastening bolt 24; the tightening process of the dust plate in this embodiment is that at the initial moment, the telescopic rod 22 of the cylinder is in an extended state, and the brake caliper bracket 8 is sleeved on the outer ring of the expansion sleeve 4 through its inner ring 80, and the air pump drives the telescopic rod 22 to retract, driving the tapered pull shaft 3 to pull down so that its conical surface squeezes the expansion sleeve 4 outward, thereby clamping the inner ring 80 of the brake caliper bracket 8, and installing the dust plate 9 on the brake caliper bracket 8, so that the fixing bolt 91 is matched and connected with the threaded hole 81, and the air pump is started again to drive the telescopic rod 22 to extend to the initial state, and the brake caliper bracket 8 can be connected to the dust plate 9 to remove the tooling. The fixed tooling in this embodiment can prevent the workpiece from shifting during the tightening process of the dust plate 9 fixing bolt 91. Compared with the traditional bolt positioning brake caliper bracket 8 method, it can be compatible with the production lines of various models and avoid the interference between the traditional positioning structure and the dust plate 9.

[0025] The above-mentioned embodiments exemplarily show the specific material of the expansion sleeve 4, the bottom fixing method, etc. In other embodiments or practical applications, the expansion sleeve 4 can also be made of other flexible materials such as silicone, or partially made of flexible materials that can be expanded and contracted along its radial direction, and partially made of rigid materials, etc. In alternative solutions to the bottom fixing method, it can also be directly fixed to the top surface of the support frame 1 by using fixing bolts or gluing.

[0026] In another embodiment, based on the above embodiment, the inner wall of the expansion sleeve 4 is a conical structure adapted to the outer wall of the tapered shaft 3. Through the matching conical structure, the tapered shaft 3 and the expansion sleeve 4 form a taper fit, thereby improving the service life of the expansion sleeve 4.

[0027] In another embodiment, based on the above embodiment, the outer wall of the big head end of the tapered pull shaft 3 is provided with a limiting step 31 which cooperates with the top end of the expansion sleeve 4. The limiting step 31 cooperates with the top end surface of the expansion sleeve 4 to limit the travel of the expansion sleeve 4 and prevent the expansion sleeve 4 from failing in function.

[0028] In another embodiment, based on the above embodiment, the support frame 1 is further provided with a positioning pin 6 protruding from its top surface, and the positioning pin 6 is adapted to the position of one of the positioning holes on the brake caliper bracket 8. When the expansion sleeve 4 fails, the expansion sleeve 4 can also be used as another positioning pin to position the workpiece through the two pins.

[0029] Another embodiment, based on the above embodiment, further includes a photoelectric switch 7 fixed on the top surface of the support frame 1, and the photoelectric switch 7 is connected to the cylinder signal. The brake caliper bracket 8 is pre-installed on the workbench. After the photoelectric switch 7 recognizes the part, the cylinder obtains the signal and pulls back downward to fix the inner ring 80 of the brake caliper bracket 8.

[0030] The utility model provides a dustproof plate tightening and fixing tool, which drives the cylinder to pull down the tapered pull shaft 3. The tapered surface of the tapered pull shaft 3 causes the expansion sleeve 4 to expand outward, thereby clamping the inner ring 80 of the brake caliper bracket 8. It can prevent the workpiece from shifting during the tightening of the dustproof plate 9, and at the same time avoid interference between the traditional positioning structure and the dustproof plate 9. Compared with the traditional bolt positioning method, it can be compatible with the production lines of various models.

Claims

1. A dust plate tightening and fixing tool, characterized in that: Including support frame, cylinder, taper shaft and expansion sleeve; The top surface of the support frame is provided with a through hole; The outer wall of the tapered pull shaft is a tapered structure; The cylinder includes a cylinder body and a telescopic rod, the cylinder body is fixedly connected to the bottom surface of the support frame, the end of the telescopic rod is fixedly connected to the small end of the cone pull shaft, and the large end of the cone pull shaft passes through the through hole of the support frame; The expansion sleeve is sleeved on the outer ring of the tapered pull shaft, and the bottom end is fixedly connected to the through hole of the support frame.

2. The dustproof plate tightening and fixing tool according to claim 1 is characterized in that: It also includes a cover plate sleeved on the outer ring of the expansion sleeve, the cover plate is fixed to the top surface of the support frame, and cooperates with the top surface of the support frame to clamp the bottom end of the expansion sleeve.

3. The dustproof plate tightening and fixing tool according to claim 1, characterized in that: The inner wall of the expansion sleeve is a conical structure matched with the outer wall of the tapered pull shaft.

4. The dustproof plate tightening and fixing tool according to claim 1, characterized in that: The outer wall of the large head end of the tapered pull shaft is provided with a limiting step matched with the top end of the expansion sleeve.

5. The dustproof plate tightening and fixing tool according to claim 1, characterized in that: The support frame is also provided with a positioning pin protruding from its top surface.

6. The dustproof plate tightening and fixing tool according to claim 1, characterized in that: It also includes a photoelectric switch fixed on the top surface of the support frame, and the photoelectric switch is connected with the cylinder signal.

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