A spare tire bracket processing fixture

Abstract

This invention relates to a spare tire bracket processing fixture, comprising a spare tire bracket back processing fixture and a spare tire bracket front processing fixture. The spare tire bracket back processing fixture includes two opposing first L-plates and a first bridge plate disposed between the two first L-plates. A first spare tire bracket fixed end clamping mechanism and a spare tire bracket suspension end clamping mechanism are fixedly mounted on the first bridge plate. The spare tire bracket suspension end clamping mechanism is equipped with a level detection mechanism. The spare tire bracket front processing fixture includes two opposing second L-plates and a second bridge plate disposed between the two second L-plates. A second spare tire bracket fixed end clamping mechanism and a spare tire bracket support mechanism are mounted on the second bridge plate. The second spare tire bracket fixed end clamping mechanism is equipped with a defect detection mechanism. The advantages of this invention are: it can detect whether the spare tire bracket is level when it is on the spare tire bracket back processing fixture; it can detect whether there are defects in the mounting holes milled at the fixed end of the spare tire bracket; and it can also detect whether the spare tire bracket is level when it is on the spare tire bracket front processing fixture.

Description

Technical Field

[0001] This invention relates to the field of milling, and more particularly to a spare tire bracket machining fixture. Background Technology

[0002] Spare tire brackets typically consist of a fixed end and a suspension end. The fixed end connects to the vehicle body to secure the spare tire bracket, while the suspension end is used to mount the spare tire box and suspend the spare tire. Therefore, when machining a spare tire bracket, mounting holes need to be milled twice, on both the fixed and suspension ends. To ensure the spare tire bracket is stably fixed to the vehicle and can properly suspend the spare tire, it must be kept level during milling. Any tilting will cause the mounting holes to tilt, thus affecting the stability of the spare tire bracket after installation. Summary of the Invention

[0003] This invention mainly solves the above-mentioned problems and provides a spare tire bracket processing fixture that can detect whether the spare tire bracket is level.

[0004] The technical solution adopted by the present invention to solve its technical problem is a spare tire bracket processing fixture, including a spare tire bracket back processing fixture and a spare tire bracket front processing fixture. The spare tire bracket back processing fixture includes two opposing first L-plates and a first bridge plate disposed between the two first L-plates. A first spare tire bracket fixed end clamping mechanism and a spare tire bracket suspension end clamping mechanism are fixedly disposed on the first bridge plate. A horizontal detection mechanism is provided on the spare tire bracket suspension end clamping mechanism. The spare tire bracket front processing fixture includes two opposing second L-plates and a second bridge plate disposed between the two second L-plates. A second spare tire bracket fixed end clamping mechanism and a spare tire bracket support mechanism are provided on the second bridge plate. A defect detection mechanism is provided on the second spare tire bracket fixed end clamping mechanism.

[0005] As a preferred embodiment of the above solution, the first spare tire bracket fixing end clamping mechanism includes a first mounting block, a first power cylinder, a first push rod, and a first pressure arm. The first mounting block is fixedly mounted on the first bridge plate, the first power cylinder and the first push rod are fixedly mounted on the upper end of the first mounting block, the first pressure arm is horizontally mounted on the piston rod of the power cylinder, and the end of the first pressure arm is provided with a first pressure head, which is located directly above the first push rod.

[0006] As a preferred embodiment of the above solution, the first mounting block is provided with an air blowing pipe on its side, which is used to blow air onto the upper end face of the first push rod.

[0007] As a preferred embodiment of the above solution, the spare tire bracket suspension end clamping mechanism includes two horizontally and oppositely arranged abutments, a mounting seat is provided between the abutments, and L-shaped pressure arms are provided on both sides of the mounting seat. The first end of the L-shaped pressure arm is provided with a stop block, the second end of the L-shaped pressure arm is driven by a second power cylinder, and the middle part of the L-shaped pressure arm is rotatably connected to the mounting seat. The stop block and the abutments cooperate to clamp the suspension end of the spare tire bracket.

[0008] As a preferred embodiment of the above solution, the horizontal detection mechanism includes a plurality of pressure sensors disposed between the abutment block and the L-shaped pressure arm, the pressure sensors being arranged in a ring.

[0009] As a preferred embodiment of the above solution, the second spare tire bracket fixing end clamping mechanism includes a lever cylinder and a second push rod. The lever end of the lever cylinder is provided with a second pressure head, which abuts against the second push rod when the lever is pressed down.

[0010] As a preferred embodiment of the above solution, the defect detection mechanism includes a sealing gasket disposed on the second pressure head and a groove disposed on the upper end of the second top rod. A hollow column is disposed in the middle of the groove, and a lifting baffle is disposed on the upper end of the hollow column. The hollow column is connected to a high-pressure air source through an air pipe. The hollow column is disposed below the edge of the groove, and the lifting baffle is disposed above the edge of the groove when it is raised. A pressure sensor is disposed in the groove.

[0011] As a preferred embodiment of the above solution, the lifting baffle includes a horizontal baffle and several connecting columns. The upper end of the hollow column is provided with several vertical grooves. The connecting columns are slidably disposed in the vertical grooves, and the horizontal baffle is disposed at the upper end of the connecting columns.

[0012] As a preferred embodiment of the above solution, the spare tire bracket support mechanism includes a base, on which a positioning post, a horizontal top, a vertical top, and an inclined top are provided. The positioning post extends into the suspension end of the spare tire bracket from the back of the spare tire bracket, and the horizontal top, vertical top, and inclined top abut against the spare tire bracket respectively.

[0013] As a preferred embodiment of the above solution, both the first bridge plate and the second bridge plate are provided with auxiliary limiting plates.

[0014] The advantages of this invention are: it is equipped with a level detection mechanism, which can detect whether the spare tire bracket is level when it is machined on the back of the spare tire bracket; it is equipped with a defect detection mechanism, which can detect whether there are defects in the mounting holes milled at the fixed end of the spare tire bracket, and can also detect whether the spare tire bracket is level when it is machined on the front of the spare tire bracket. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a machining fixture on the back of the spare tire bracket in the embodiment.

[0016] Figure 2 This is a schematic diagram of another three-dimensional structure of the machining fixture on the back of the spare tire bracket in the embodiment.

[0017] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle.

[0018] Figure 4 This is a three-dimensional structural diagram of a machining fixture for the front of the spare tire bracket in the embodiment.

[0019] Figure 5 This is a schematic diagram of another three-dimensional structure of the machining fixture for the front of the spare tire bracket in the embodiment.

[0020] Figure 6 This is a cross-sectional view of the second push rod and the lifting baffle in the embodiment.

[0021] 1-First L-plate 2-First bridge plate 3-Spare tire bracket 4-First power cylinder 5-First pressure arm 6-First push rod 7-Auxiliary limit plate 8-Mounting hole 9-Air blowing pipe 10-Mounting seat 11-Second power cylinder 12-L-shaped pressure arm 13-Butt head 14-Butt block 15-Second L-plate 16-Second bridge plate 17-Lever cylinder 18-Second push rod 19-Second pressure head 20-Seat body 21-Positioning column 22-Vertical push head 23-Horizontal push head 24-Inclined push head 25-Hollow column 26-Connecting column 27-Horizontal baffle 28-Vertical groove 29-Groove. Detailed Implementation

[0022] The technical solution of the present invention will be further described below through embodiments and in conjunction with the accompanying drawings.

[0023] Example:

[0024] This embodiment discloses a spare tire bracket processing fixture, including a spare tire bracket back processing fixture and a spare tire bracket front processing fixture. When processing the spare tire bracket, the back and sides of the spare tire bracket are first processed using the spare tire bracket back processing fixture, and then the front of the spare tire bracket is processed using the spare tire bracket front processing fixture.

[0025] like Figure 1 and Figure 2 As shown, the spare tire bracket back processing fixture includes two opposing first L plates 1 and a first bridge plate 2 located between the two first L plates 1. The first bridge plate 2 is fixedly provided with a first spare tire bracket fixed end clamping mechanism and a spare tire bracket suspension end clamping mechanism. The spare tire bracket suspension end clamping mechanism is provided with a horizontal detection mechanism.

[0026] The first spare tire bracket fixing end clamping mechanism includes a first mounting block, a first power cylinder 4, a first push rod 6, and a first pressure arm 5. The first mounting block is fixedly mounted on the first bridge plate 2. The first power cylinder 4 and the first push rod 6 are fixedly mounted on the upper end of the first mounting block. The first pressure arm 5 is horizontally mounted on the piston rod of the power cylinder 4. The end of the first pressure arm 5 is provided with a first pressure head, which is located directly above the first push rod. The first pressure head and the first push rod cooperate to fix the spare tire bracket. In addition, the side of the first mounting block is also provided with an air blowing pipe 9, which is used to blow air onto the upper end face of the first push rod to prevent debris residue on the first push rod from affecting the horizontality of the spare tire bracket.

[0027] like Figure 3 As shown, the spare tire bracket suspension end clamping mechanism includes two horizontally and oppositely arranged abutments 13, with a mounting base 10 between the abutments 13. L-shaped pressure arms 12 are arranged on both sides of the mounting base 10. The first end of the L-shaped pressure arm is provided with a stop block 14. The second end of the L-shaped pressure arm 12 is driven by a second power cylinder 11. The middle part of the L-shaped pressure arm 12 is rotatably connected to the mounting base 10. The stop block 14 and the abutment 13 cooperate to clamp the suspension end of the spare tire bracket.

[0028] The horizontal detection mechanism includes several pressure sensors arranged in a ring between the abutment block 14 and the L-shaped pressure arm 12.

[0029] When using the back-side machining fixture to clamp and fix the spare tire bracket, the suspended end of the spare tire bracket 3 is positioned downwards and the fixed end upwards. The first spare tire bracket fixed end clamping mechanism clamps and fixes the edge of the fixed end, and the spare tire bracket suspended end clamping mechanism clamps and fixes the suspended end of the spare tire bracket 3. After the suspended end of the spare tire bracket is clamped and fixed by the suspended end clamping mechanism, the levelness of the spare tire bracket is determined by comparing the readings of each pressure sensor. If the absolute value of the difference between the readings of each pressure sensor is less than a preset threshold, the spare tire bracket is determined to be level. If the absolute value of the difference between the readings of each pressure sensor is greater than the preset threshold, the spare tire bracket is determined to be tilted and its posture needs to be adjusted. After determining that the spare tire bracket is level, the machine tool mills the surface of the mounting hole 8 on the back side of the mounting end of the spare tire bracket and mills through holes on both sides of the suspended end of the spare tire bracket.

[0030] like Figure 4 and Figure 5 As shown, the spare tire bracket front processing fixture includes two opposing second L plates 15 and a second bridge plate 16 located between the two second L plates. The second bridge plate 16 is provided with a second spare tire bracket fixed end clamping mechanism and a spare tire bracket support mechanism. The second spare tire bracket fixed end clamping mechanism is provided with a defect detection mechanism.

[0031] The second spare tire bracket fixing end clamping mechanism includes a lever cylinder 17 and a second push rod 18. The lever end of the lever cylinder 17 is provided with a second pressure head 19, which abuts against the second push rod 18 when the lever is pressed down. The second spare tire bracket fixing end clamping mechanism is used to clamp the spare tire bracket through the milled mounting hole.

[0032] The spare tire bracket support mechanism includes a base 20, on which a positioning post 21, a horizontal top 23, a vertical top 22, and an inclined top 24 are provided. The positioning post 21 extends from the back of the spare tire bracket into the suspension end of the spare tire bracket, and the horizontal top 23, the vertical top 22, and the inclined top 24 abut against the spare tire bracket respectively.

[0033] like Figure 6 As shown, the defect detection mechanism includes a sealing gasket on the second pressure head 19 and a groove 29 on the upper end of the second push rod. A hollow column 25 is set in the middle of the groove, and a lifting baffle is provided at the upper end of the hollow column. The hollow column 25 is hollow inside and connected to a high-pressure air source through an air pipe. The hollow column 25 is set below the edge of the groove 29. When the lifting baffle is raised, it is higher than the edge of the groove. A pressure sensor is provided in the groove. The lifting baffle includes a horizontal baffle 27 and several connecting columns 26. Several vertical grooves 28 are provided at the upper end of the hollow column 25. The connecting columns 26 are slidably set in the vertical grooves 28, and the horizontal baffle 27 is located at the upper end of the connecting columns. When the spare tire bracket is not placed, air is released through the high-pressure air source. The airflow blows the horizontal plate so that the horizontal plate is higher than the second push rod. Under the action of the horizontal plate, the airflow is blown out radially to blow away the debris on the second push rod. After the spare tire bracket 3 is clamped at the fixed end of the second spare tire bracket, the mounting hole 8, milled on the back of the spare tire bracket and machined by the fixture, abuts against the second push rod. At this time, the sealing gasket on the second pressure head covers the mounting hole 8, making the groove 29 a sealed cavity. After the high-pressure air source is released and closed, the gas in this sealed cavity can only flow out through the gap between the milled surface of the mounting hole and the second push rod. The air pressure sensor in the groove can detect the air pressure change to detect whether there are defects on the milled surface of the mounting hole or whether the spare tire bracket is level. Specifically, if the air pressure drops rapidly, it indicates that the spare tire bracket is not level or there are defects in the milling at the mounting hole. If the air pressure drops slowly, it indicates that the spare tire bracket is level and there are no defects in the milling at the mounting hole.

[0034] In addition, auxiliary limiting plates 7 for guiding the spare tire bracket, lifting rings for easy clamping, and pressure gauges for detecting the pressure of the power rod are also provided on the first and second bridge plates.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A spare tire bracket processing fixture, characterized in that: The system includes a back-side machining fixture for a spare tire bracket and a front-side machining fixture for a spare tire bracket. The back-side machining fixture includes two opposing first L-plates and a first bridge plate positioned between the two first L-plates. A first spare tire bracket fixing end clamping mechanism and a spare tire bracket suspension end clamping mechanism are fixedly mounted on the first bridge plate. The spare tire bracket suspension end clamping mechanism is equipped with a horizontal detection mechanism. The front-side machining fixture includes two opposing second L-plates and a second bridge plate positioned between the two second L-plates. A second spare tire bracket fixing end clamping mechanism and a spare tire bracket support mechanism are mounted on the second bridge plate. The fixed-end clamping mechanism is equipped with a defect detection mechanism; the second spare tire bracket fixed-end clamping mechanism includes a lever cylinder and a second push rod. The lever end of the lever cylinder is equipped with a second pressure head, which abuts against the second push rod when the lever is pressed down; the defect detection mechanism includes a sealing gasket on the second pressure head and a groove on the upper end of the second push rod. A hollow column is provided in the middle of the groove, and a lifting baffle is provided at the upper end of the hollow column. The hollow column is internally hollow and connected to a high-pressure air source through an air pipe. The hollow column is set below the edge of the groove, and the lifting baffle is higher than the edge of the groove when it is raised. A pressure sensor is provided in the groove.

2. The spare tire bracket processing fixture according to claim 1, characterized in that: The first spare tire bracket fixing end clamping mechanism includes a first mounting block, a first power cylinder, a first push rod, and a first pressure arm. The first mounting block is fixedly mounted on the first bridge plate. The first power cylinder and the first push rod are fixedly mounted on the upper end of the first mounting block. The first pressure arm is horizontally mounted on the piston rod of the power cylinder. The end of the first pressure arm is provided with a first pressure head, which is located directly above the first push rod.

3. The spare tire bracket processing fixture according to claim 2, characterized in that: The first mounting block has an air blowing pipe on its side, which is used to blow air onto the upper end face of the first push rod.

4. The spare tire bracket processing fixture according to claim 1, characterized in that: The spare tire bracket suspension end clamping mechanism includes two horizontally and oppositely arranged abutments, a mounting seat between the abutments, and L-shaped pressure arms on both sides of the mounting seat. The first end of the L-shaped pressure arm is provided with a stop block, the second end of the L-shaped pressure arm is driven by a second power cylinder, and the middle part of the L-shaped pressure arm is rotatably connected to the mounting seat. The stop block and the abutments cooperate to clamp the suspension end of the spare tire bracket.

5. The spare tire bracket processing fixture according to claim 4, characterized in that: The horizontal detection mechanism includes several pressure sensors disposed between the abutment block and the L-shaped pressure arm, and the pressure sensors are arranged in a ring.

6. The spare tire bracket processing fixture according to claim 1, characterized in that: The lifting baffle includes a horizontal baffle and several connecting columns. The upper end of the hollow column is provided with several vertical grooves. The connecting columns are slidably disposed in the vertical grooves. The horizontal baffle is disposed at the upper end of the connecting columns.

7. The spare tire bracket processing fixture according to claim 1, characterized in that: The spare tire bracket support mechanism includes a base, on which a positioning post, a horizontal top, a vertical top, and an inclined top are provided. The positioning post extends into the suspension end of the spare tire bracket from the back of the spare tire bracket, and the horizontal top, vertical top, and inclined top abut against the spare tire bracket respectively.

8. The spare tire bracket processing fixture according to claim 1, characterized in that: Both the first bridge plate and the second bridge plate are equipped with auxiliary limiting plates.

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