Control arm assembly pressing rivet die of automatic adjusting arm

Abstract

The utility model discloses a control arm assembly pressure riveting die of an automatic adjusting arm, which comprises an upper die and a lower die, a connecting handle is fixedly arranged at the center of the top surface of the upper die, a pressure riveting head matched with a central hole of a workpiece is arranged at the center of the bottom of the upper die, and a die cavity matched with the pressure riveting head is arranged at the center of the lower die; wherein the bottom face of the upper die inclines downwards to form a rivet pressing cavity with a trapezoidal longitudinal section, the rivet pressing head is installed in the rivet pressing cavity, the top of the rivet pressing head is in an inverted frustum shape matched with an upper end cavity opening of a workpiece center hole, the top face of the rivet pressing head is fixedly connected with the cavity bottom plane of the rivet pressing cavity, and the bottom of the rivet pressing head extends out of the rivet pressing cavity. Parts of the control arm assembly can be rapidly fixed together through the upper die and the lower die, the assembling efficiency of the control arm assembly is improved, the pressing rivet cavity with the trapezoidal longitudinal section is formed in the bottom face of the upper die, the tops of bushings of the control arm assembly can be firmly riveted together, and the quality of the control arm assembly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic clearance adjustment arm processing, in particular to a control arm assembly riveting die for an automatic adjustment arm. Background Art

[0002] The automatic adjustment arm is a very important component in the brake system. Its function is to drive the camshaft to adjust the gap between the brake pad and the brake hub to the initial state. The automatic adjustment arm mainly includes a housing, a worm gear, a worm, and a cover assembly and a control arm assembly arranged on the worm gear chamber.

[0003] The control arm assembly consists of a control arm, a control ring, a sealing gasket and a control arm cover. During production, the above parts need to be fixed together to form the control arm assembly and then installed on the housing. At present, the commonly used method is to insert the bushing into the above parts and then fix the parts by hammering. This method has low production efficiency, is not conducive to industrial production, and the quality of the product cannot be guaranteed by manual operation. Therefore, how to quickly fix the above parts together to improve the production efficiency and quality of the control arm assembly is an urgent problem to be solved. Utility Model Content

[0004] In view of the defects and shortcomings existing in the above-mentioned background technology, the utility model provides a control arm assembly pressure riveting die of an automatic adjustment arm, by means of which the parts of the control arm assembly can be quickly riveted and fixed.

[0005] To achieve the above-mentioned purpose, the utility model provides a control arm assembly riveting mold for an automatic adjusting arm, comprising an upper mold, a connecting handle is fixedly provided at the center of the top surface of the upper mold, a rivet head matching the center hole of a workpiece is provided at the center of the bottom thereof, and a lower mold, a mold cavity matching the rivet head is provided at the center thereof; wherein, the bottom surface of the upper mold is inclined downward to form a rivet cavity with a trapezoidal longitudinal section, the rivet head is installed in the rivet cavity, and its top is an inverted truncated cone shape matching the upper end cavity opening of the center hole of the workpiece, and the top surface of the rivet head is fixedly connected to the bottom plane of the rivet cavity, and its bottom protrudes out of the rivet cavity.

[0006] When the control arm assembly riveting die of the automatic adjusting arm of the above technical solution is used to rivet the control part assembly parts, first, the control arm, control ring, sealing gasket, control arm cover and other parts are mounted on the bushing as required, and then the assembled workpiece is placed in the mold cavity of the lower mold, and then the upper mold is moved downward, and the rivet head is inserted into the center hole of the workpiece. As the upper mold moves downward, the bushing is pressed down to form a cap around the bushing under the action of the lower mold cavity, that is, the bottom surface of the lower mold, so as to fix the control arm, control ring, sealing gasket and control arm cover to complete the riveting. The operation is simple and easy to use, and the components of the control arm assembly can be quickly fixed together. The mold can also ensure the uniformity of product quality.

[0007] The control arm assembly riveting die of the above technical solution also includes: a fixing sleeve, which is sleeved on the outer side of the upper die and fixedly connected to the upper die, and the top end of the connecting handle extends out of the fixing sleeve; a telescopic part, which is sleeved on the outer surface of the upper die, and the telescopic part is arranged under the fixing sleeve and fixedly connected thereto; and a pre-compression plate, which is fixedly connected to the telescopic part so that the pre-compression plate moves up and down with the expansion and contraction of the telescopic part. In the initial state, the rivet head is located in the pre-compression plate, and the pre-compression plate is first pressed onto the workpiece under the action of the telescopic part to ensure the stability of the workpiece during the riveting process.

[0008] Furthermore, an annular bearing plate is provided between the fixed sleeve and the telescopic member, and the bearing plate is sleeved on the outer side of the upper mold. Providing the bearing plate can reduce the bearing capacity of the fixed sleeve and extend its service life.

[0009] Furthermore, the fixing sleeve, the bearing plate, the telescopic member and the pre-stressing plate are connected by connecting bolts, wherein the telescopic member and the pre-stressing plate are both slidably connected to the bare rod portion of the screw of the connecting bolt, the head of the connecting bolt passes through the pre-stressing plate, the telescopic member and the bearing plate in sequence from bottom to top and is threadedly connected to the fixing sleeve, and the tail of the connecting bolt is located in the countersunk hole provided on the pre-stressing plate. The bearing plate, the telescopic member and the pre-stressing plate are fixed together with the fixing sleeve by bolts for easy assembly.

[0010] Furthermore, a mounting hole is provided on the fixing sleeve along its axial direction, a connecting sleeve is fixed in the mounting hole, and the connecting bolt is threadedly connected to the connecting sleeve.

[0011] Furthermore, the telescopic member is a rubber spring. The rubber spring not only meets the use requirements, but is also easy to install.

[0012] Furthermore, the rivet head is in the shape of a truncated cone with a large top and a small bottom. The rivet head in the shape of an inverted truncated cone plays a self-centering role, making it easy to insert the rivet head into the inner hole of the workpiece, thereby ensuring the reliability of the rivet die of the utility model and the stability of its operation.

[0013] Furthermore, a positioning ring coaxially arranged with the mold cavity is arranged on the upper surface of the lower mold, and a mounting plate is fixedly connected to the bottom of the positioning ring. The positioning ring is convenient for positioning the workpiece and improves the convenience of use, and the mounting plate is convenient for fixing the lower mold.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] 1. The control arm assembly riveting die of the utility model can quickly fix the components of the control arm assembly together by using the upper die and the lower die, thereby improving the assembly efficiency of the control arm assembly, and the bottom surface of the upper die is provided with a riveting cavity with a trapezoidal longitudinal section, which can firmly rivet the top of the bushing of the control arm assembly together, thereby ensuring its riveting force and the quality of the workpiece;

[0016] 2. The utility model is also provided with a pre-pressing plate. When in use, the pre-pressing plate first contacts the workpiece under the action of the telescopic member, thereby ensuring the stability of the workpiece and improving the quality of the processed product;

[0017] 3. The lower die of the utility model is provided with a positioning ring, which is convenient for positioning the workpiece and improves the convenience of use;

[0018] 4. The present invention can complete the riveting fixation of the parts of the control arm assembly by the cooperation of the upper die and the lower die, and has a simple structure, is easy to manufacture, and is easy to promote and implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of this specification and are used to further understand the present utility model, illustrate preferred embodiments of the present utility model and are used together with the specification to illustrate the principles of the present utility model. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of a control arm assembly riveting die of the utility model automatic adjustment arm;

[0021] Figure 2 It is an enlarged structural schematic diagram of a rivet head of a rivet die for a control arm assembly of an automatic adjustment arm of the present invention;

[0022] Figure 3 A schematic diagram of the use status of a control arm assembly riveting die of the automatic adjusting arm of the utility model.

[0023] Numbers in the figure: 1, upper die, 2, load-bearing plate, 3, rubber spring, 4, pre-load plate, 5, lower die, 6, bolt, 7, connecting sleeve, 8, connecting handle, 9, rivet head, 10, positioning ring, 11, fixing plate, 12, rivet cavity, 13, fixing sleeve, 14, workpiece. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] Example 1: Figure 1 The control arm assembly riveting die of the automatic adjustment arm shown in the figure comprises an upper die 1 and a lower die 5. A connecting handle 8 is fixedly arranged at the center of the top surface of the upper die 1, a riveting head 9 matching the center hole of the workpiece is arranged at the center of the bottom thereof, and a die cavity matching the riveting head 9 is arranged at the center of the lower die 5. Figure 2As shown, the bottom surface of the upper mold 1 is tilted downward to form a riveting cavity 12 with a trapezoidal longitudinal section, that is, the riveting cavity 12 is a conical cavity that is small at the top and large at the bottom. The bottom surface of the upper mold 1 is tilted downward at an angle of 5° and has a depth of 0.22 mm.

[0026] The rivet head 9 is installed in the rivet cavity 12. The top of the rivet head 9 is in the shape of an inverted truncated cone that matches the upper end of the center hole of the workpiece. The inverted truncated cone is adapted to the shape of the opening of the center hole of the workpiece. The top surface of the rivet head 9 is fixedly connected to the bottom plane of the rivet cavity 12, and the bottom of the rivet head 9 extends out of the rivet cavity 12. Since the bottom surface of the upper die is a downwardly inclined surface, the cap can be better punched out of the workpiece, so that the various parts of the control arm assembly are more firmly connected.

[0027] When the radial control arm assembly is riveted using the riveting die of the control arm assembly of the automatic adjusting arm of the above-mentioned embodiment, the die is first installed on a press, the connecting handle 8 is connected to the pressing head of the press, and the lower die 5 is installed on the workbench of the press. After the die is installed, the control arm, control ring, sealing gasket, control arm cover and other parts are mounted on the bushing as required, and then the assembled workpiece is placed in the mold cavity of the lower die 5, and then the upper die 1 is moved downward, and the rivet head 9 is inserted into the center hole of the workpiece. As the upper die 1 moves downward, the bottom surface of the upper die 1 presses the bushing down to form a cap to fix the control arm, control ring, sealing gasket and control arm cover, completing the riveting. The operation is simple and easy to use, and the components of the control arm assembly can be quickly fixed together. The mold can also ensure the uniformity of product quality.

[0028] In this embodiment, the rivet head 9 is a truncated cone with a large top and a small bottom. The rivet head 9 with an inverted truncated cone shape plays a self-centering role, which facilitates the insertion of the rivet head 9 into the inner hole of the workpiece, ensuring the reliability of the rivet die of the utility model and the stability of its operation.

[0029] In this embodiment, a positioning ring 10 is provided on the upper surface of the lower mold 5 and is coaxial with the mold cavity, and a mounting plate 11 is fixedly connected to the bottom thereof. The positioning ring 10 is provided to facilitate positioning of the workpiece and improve the convenience of use, and the mounting plate 10 is provided to facilitate fixing of the lower mold 5.

[0030] Embodiment 2: This embodiment adds a pre-pressing plate 4 on the basis of embodiment 1 to improve the stability of each component during riveting, so that each workpiece can be smoothly prevented from falling onto the lower die, thereby ensuring product quality. Figure 1As shown, the control arm assembly riveting die of the present embodiment also includes: a fixed sleeve 13, a telescopic part 3 and a pre-stressing plate 4. The fixed sleeve 13 is sleeved on the outside of the upper mold 1. The fixed sleeve 13 is cylindrical with an open lower end. The top cover plate of the fixed sleeve 13 is fixedly connected to the top surface of the upper mold 1 by screws, and the top end of the connecting handle 8 extends out of the fixed sleeve 13. The telescopic part 3 is sleeved on the outer surface of the upper mold 1. The telescopic part 3 is arranged below the fixed sleeve 13 and fixedly connected thereto. The pre-stressing plate 4 is fixedly connected to the telescopic part 3 so that the pre-stressing plate 4 moves up and down with the telescopic part 3. In the initial state, the rivet head 9 is located in the pre-stressing plate 4, that is, as the upper mold 1 moves downward, the pre-stressing plate 4 first contacts the workpiece 14 (see Figure 2 ), under the action of the telescopic member 3, the pre-pressing plate 4 is first pressed onto the workpiece 14 to ensure the stability of the workpiece during the riveting process and to ensure product quality.

[0031] In this embodiment, in order to prevent the fixing sleeve 13 from being deformed by force during use, an annular bearing plate 2 is provided between the fixing sleeve 13 and the telescopic member 3, and the bearing plate 2 is sleeved on the outer side of the upper mold 1. The bearing plate 2 and the telescopic member 3 can slide relative to the outer mold, and the bearing plate 2 can reduce the bearing capacity of the fixing sleeve 13 and extend its service life. The telescopic member 3 is a rubber spring, which not only meets the use requirements, but also facilitates installation.

[0032] In this embodiment, the fixing sleeve 13, the bearing plate 2, the telescopic member 3 and the preload plate 4 are connected by the connecting bolt 6, wherein the telescopic member 3 and the bare rod of the connecting bolt 6 are clearance-matched, and the hole diameter through which the arch screw provided on the preload plate 4 passes is larger than the diameter of the connecting screw 6, so that the telescopic member 3 and the preload plate 4 are both slidably connected with the bare rod of the connecting bolt 6, and the head of the connecting bolt passes through the preload plate 4, the telescopic member 3 and the bearing plate 2 from bottom to top in sequence and is threadedly connected with the fixing sleeve 13, and the tail thereof is located in the countersunk hole provided on the preload plate 4. The bearing plate 2, the telescopic member 3 and the preload plate 4 are fixed together with the fixing sleeve 13 by bolts for easy assembly.

[0033] In this embodiment, mounting holes 15 are provided on the fixing sleeve 13 along its axial direction. There are 6 mounting holes 15, and the 6 mounting holes are evenly distributed on the fixing sleeve 13 along the same circumference. A connecting sleeve 7 is fixed in the mounting holes 15, and an internal thread is provided in the connecting sleeve 7. The connecting bolt 6 is threadedly connected to the connecting sleeve 7.

[0034] The control arm assembly riveting die of this embodiment presses the workpiece by providing a pre-pressing plate, so that the surfaces of the various components of the control arm assembly fit together, and can also prevent the workpiece from shaking during the riveting process, providing a basis for ensuring product quality.

[0035] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A riveting die for a control arm assembly of an automatic adjustment arm, characterized in that: include: An upper die, wherein a connecting handle is fixedly arranged at the center of the top surface of the upper die, and a rivet head matching the center hole of the workpiece is arranged at the center of the bottom surface of the upper die, and The lower die has a die cavity at its center adapted to the riveting head; wherein, The bottom surface of the upper die is tilted downward to form a riveting cavity with a trapezoidal longitudinal section. The riveting head is installed in the riveting cavity, and its top is an inverted truncated cone that matches the upper end cavity opening of the workpiece center hole. The top surface of the riveting head is fixedly connected to the bottom plane of the riveting cavity, and its bottom protrudes out of the riveting cavity.

2. The control arm assembly riveting die of the automatic adjustment arm according to claim 1, characterized in that: The control arm assembly riveting die also includes: A fixing sleeve, which is sleeved on the outer side of the upper mold and fixedly connected to the upper mold, and the top end of the connecting handle extends out of the fixing sleeve; A telescopic member, sleeved on the outer surface of the upper mold, the telescopic member is arranged below the fixed sleeve and fixedly connected thereto; and The pre-pressing plate is fixedly connected to the telescopic member so that the pre-pressing plate moves up and down as the telescopic member is extended and retracted. In an initial state, the rivet head is located in the pre-pressing plate.

3. The control arm assembly riveting die of the automatic adjustment arm according to claim 2, characterized in that: An annular load-bearing plate is arranged between the fixed sleeve and the telescopic member, and the load-bearing plate is sleeved on the outer side of the upper mold.

4. The control arm assembly riveting die of the automatic adjustment arm according to claim 3, characterized in that: The fixing sleeve, load-bearing plate, telescopic member and pre-load plate are connected by connecting bolts, wherein the telescopic member and the pre-load plate are both slidably connected to the bare rod portion of the connecting bolt, the head of the connecting bolt passes through the pre-load plate, the telescopic member and the load-bearing plate in sequence from bottom to top and is threadedly connected to the fixing sleeve, and the tail of the connecting bolt is located in a countersunk hole opened on the pre-load plate.

5. The control arm assembly riveting die of the automatic adjustment arm according to claim 4, characterized in that: A mounting hole is arranged on the fixing sleeve along its axial direction, a connecting sleeve is fixed in the mounting hole, and the connecting bolt is threadedly connected with the connecting sleeve.

6. The control arm assembly riveting die of the automatic adjustment arm according to claim 2, characterized in that: The telescopic member is a rubber spring.

7. The control arm assembly riveting die of the automatic adjustment arm according to claim 1, characterized in that: The rivet head is in the shape of a truncated cone with a larger top and a smaller bottom.

8. The control arm assembly riveting die of the automatic adjustment arm according to claim 1, characterized in that: A positioning ring is arranged on the upper surface of the lower mold and is coaxially arranged with the mold cavity, and a mounting plate is fixedly connected to the bottom of the positioning ring.

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