Automobile rear cleat hole machining clamp

Abstract

The invention relates to the technical field of clamps, and discloses an automobile rear cleat hole machining clamp which comprises a machining table, a cleat body is arranged at the top of the machining table, an anti-deviation mechanism is arranged at the top of the machining table, a through hole is formed in the machining table, and a clamping mechanism is arranged in the machining table. The clamping mechanism comprises a driving assembly and a positioning assembly, the driving assembly comprises a first motor, the first motor is installed at the bottom of the machining table, the output end of the first motor is fixedly connected with a first cylindrical gear, the first cylindrical gear is located in the machining table, and the positioning assembly comprises a fixing ring. The fixing ring is fixedly connected to the inner wall of the inner cavity of the machining table. Through collaborative design of the anti-deviation mechanism and the clamping mechanism, accurate positioning and stable clamping of the special-shaped claw body are achieved, the anti-deviation mechanism pushes an anti-deviation plate through a trapezoidal groove designed at a specific angle, the angle of the claw body is accurately locked, and machining errors caused by angle deviation are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fixtures, in particular to a fixture for machining rear clevis holes of an automobile. Background Art

[0002] As a key component of the vehicle's suspension system, the machining accuracy of the rear clevis directly impacts vehicle stability, handling, and safety. The mounting holes on the rear clevis must meet extremely precise requirements; even the slightest deviation can lead to uneven force distribution in the suspension system, causing issues like vehicle vibration and abnormal tire wear. The development of the automotive industry has placed higher demands on the production efficiency and machining quality of the rear clevis. As the core equipment for ensuring machining accuracy, the performance of the rear clevis hole machining fixture is crucial.

[0003] Currently, most common automotive rear clevis hole machining fixtures on the market utilize traditional mechanical positioning and clamping methods. For example, the clevis is positioned using simple bolts or manually adjusted positioning blocks, and clamped using hydraulic or pneumatic fixtures. The positioning principle primarily relies on manually placing the clevis in a pre-set positioning slot, then adjusting the positioning blocks to determine the angle and position of the clevis. During clamping, a hydraulic or pneumatic device provides the clamping force, securing the clevis to the machining table. This fixture structure is relatively simple and low-cost, meeting production needs to a certain extent.

[0004] However, in actual machining scenarios, the drawbacks of existing fixtures become apparent when encountering irregularly shaped rear clevises. For example, on an automotive parts production line, when machining complex rear clevises, workers spend a considerable amount of time manually adjusting the angle of the clevis, as traditional fixtures lack precise angle positioning devices. This also makes it difficult to ensure consistent positioning, resulting in large errors in hole placement. Therefore, the present invention provides a fixture for machining rear clevis holes in automobiles to address the shortcomings of the existing technology. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fixture for machining rear clevis holes in automobiles, which solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fixture for processing rear horn holes of automobiles, comprising a processing table, a horn body is provided on the top of the processing table, an anti-deflection mechanism is provided on the top of the processing table, a through hole is opened inside the processing table, a clamping mechanism is provided inside the processing table, the clamping mechanism includes a driving assembly and a positioning assembly, the driving assembly includes motor 1, the motor 1 is installed at the bottom of the processing table, the output end of the motor 1 is fixedly connected to a cylindrical gear 1, and the cylindrical gear 1 is located inside the processing table.

[0007] Preferably, the positioning assembly includes a fixing ring, which is fixedly connected to the inner wall of the internal cavity of the processing table. The top of the fixing ring is fixedly connected to two limiting columns, and the top of the limiting columns is fixedly connected to the inner wall of the processing table.

[0008] Preferably, a gear ring is provided on the top of the fixing ring, two arc-shaped grooves are provided inside the gear ring, and the outer side of the limiting column is slidably connected to the inner side of the arc-shaped groove.

[0009] Preferably, the outer side of the gear ring is meshed with the outer side of the cylindrical gear 1, and the interior of the processing table is rotatably connected with four cylindrical gears 2, and the outer sides of the cylindrical gears 2 are meshed with the inner sides of the gear ring.

[0010] Preferably, a plurality of connecting rods are fixedly connected to the inner side of the fixing ring, one end of the plurality of connecting rods is fixedly connected to a circular ring, and sliding holes are provided inside the circular ring and the fixing ring.

[0011] Preferably, a rack plate is slidably connected to the interior of the sliding hole, and the outer side of the rack plate is meshed with the outer side of the second cylindrical gear.

[0012] Preferably, one end of the rack plate is fixedly connected to a splint, and the outer side of the splint is in contact with the outer side of the horn body.

[0013] Preferably, the anti-deflection mechanism includes a fixed frame and a guide rod, the bottom of the fixed frame is fixedly connected to the top of the processing table, and the outer side of the processing table is equipped with a second motor.

[0014] Preferably, the output end of motor 2 is fixedly connected to a screw rod, one end of the screw rod is rotatably connected to the inner side of the fixed frame, the outer side of the screw rod is threadedly connected to a threaded block, the outer side of the threaded block is slidingly connected to the inner side of the fixed frame, and the outer side of the threaded block is fixedly connected to a movable plate.

[0015] Preferably, the guide rod is fixedly connected to the top of the processing table, the outer side of the guide rod is slidably connected to two anti-deflection plates, the bottom of the anti-deflection plate is slidably connected to the top of the processing table, and a trapezoidal groove is provided on the outer side of the movable plate, and the inner side of the trapezoidal groove is slidably connected to the outer sides of the two anti-deflection plates.

[0016] The present invention provides a fixture for machining rear clevis holes in automobiles. It has the following beneficial effects: 1. The present invention realizes precise positioning and stable clamping of the special-shaped ram horn body through the coordinated design of the anti-deflection mechanism and the clamping mechanism. The anti-deflection mechanism uses a trapezoidal groove designed at a specific angle to push the anti-deflection plate to accurately lock the angle of the ram horn body, avoiding processing errors caused by angular deviation; the gear rack transmission structure of the clamping mechanism firmly clamps the ram horn body while preventing deformation caused by improper clamping force, providing a reliable foundation for high-precision hole processing and effectively improving processing quality and accuracy.

[0017] 2. The present invention optimizes the angle of the trapezoidal groove through the anti-deflection mechanism, ensuring that the anti-deflection plate limits the angle of the horn with appropriate force, so that it cannot deviate during the processing process, effectively avoiding the hole processing error caused by angle deviation, providing reliable guarantee for the high-precision processing of special-shaped horns, and significantly improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a right side perspective view of the present invention; Figure 2 It is a left perspective view of the present invention; Figure 3 A bottom view of the present invention; Figure 4 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 5 It is a structural schematic diagram of the anti-deflection mechanism of the present invention.

[0019] Among them, 1. Processing table; 2. Sheep horn body; 3. Anti-deflection mechanism; 301. Fixed frame; 302. Motor 2; 303. Screw; 304. Threaded block; 305. Movable plate; 306. Trapezoidal groove; 307. Guide rod; 308. Anti-deflection plate; 4. Through hole; 5. Motor 1; 6. Cylindrical gear 1; 7. Fixed ring; 8. Limiting column; 9. Gear ring; 10. Arc groove; 11. Connecting rod; 12. Circular ring; 13. Cylindrical gear 2; 14. Sliding hole; 15. Rack plate; 16. Clamp. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Please see the attached Figure 1 -Attached Figure 5The embodiment of the present invention provides a fixture for processing rear ram's horn holes in automobiles, comprising a processing table 1, a specific mounting groove being provided on the top of the processing table 1, a ram's horn body 2 being placed on the top of the processing table 1, and its bottom being matched in shape with a through-hole 4 opened inside the processing table 1, and the through-hole 4 serving as a preliminary positioning. An anti-deflection mechanism 3 is provided on the top of the processing table 1, a through-hole 4 is opened inside the processing table 1, and a clamping mechanism is also provided inside the processing table 1. The clamping mechanism comprises a driving assembly and a positioning assembly. In the driving assembly, a motor 1 5 is used as the core power source and is installed in a specific mounting groove at the bottom of the processing table 1 and fixed by bolts to ensure stability during operation and reduce the impact of vibration on processing accuracy. The output end of the motor 1 5 is key-connected to a cylindrical gear 1 6 to ensure effective power transmission. The cylindrical gear 1 6 is located inside the processing table 1. As for the positioning assembly, a fixing ring 7 is welded to the side wall of the cavity inside the processing table 1, and its inner diameter is adapted to the outer diameter of the gear ring 9, providing stable rotation support for the gear ring 9. Two limiting posts 8 are fixedly connected to the top of the fixed ring 7. The height of the limiting posts 8 is precisely designed to ensure that the gear ring 9 is limited in the vertical direction without affecting its horizontal rotation. Their surface is polished to reduce friction between the curved grooves 10 and the gear ring 9, making the rotation of the gear ring 9 smoother. The top of the limiting posts 8 is fixedly connected to the inner wall of the processing table 1. A gear ring 9 is provided on the top of the fixed ring 7. Two curved grooves 10 are formed inside the gear ring 9. The outer side of the limiting posts 8 is slidably connected to the inner side of the curved grooves 10, and the outer side of the gear ring 9 meshes with the outer side of the cylindrical gear 1 6. The inner rotation of the processing table 1 is connected to four cylindrical gears 2 13. These four cylindrical gears 2 13 are evenly distributed on the inner side of the fixed ring 7, and their axes are radially arranged with the center of the fixed ring 7. This ensures that the rotation of the gear ring 9 can synchronously drive the four cylindrical gears 2 13. The outer side of the cylindrical gear 2 13 meshes with the inner side of the gear ring 9. A plurality of connecting rods 11 are fixedly connected to the inner side of the fixed ring 7, and a circular ring 12 is fixedly connected to one end of the plurality of connecting rods 11. Sliding holes 14 are provided inside the circular ring 12 and the fixed ring 7. Lubricating grooves are provided on the inner walls of the sliding holes 14. Lubricating oil is regularly injected to reduce the friction when the rack plate 15 slides, thereby improving the movement accuracy and service life. The interior of the sliding hole 14 is slidably connected to a rack plate 15, and the outer side of the rack plate 15 is meshed with the outer side of the cylindrical gear 2 13. One end of the rack plate 15 is fixedly connected to a splint 16, and the inner surface of the splint 16 is bonded with a non-slip rubber pad, which can not only increase the friction with the ram horn body 2 to prevent the ram horn body 2 from sliding during the clamping process, but also play a buffering role to prevent the splint 16 from causing damage to the surface of the ram horn body 2. The outer side of the splint 16 is in contact with the outer side of the ram horn body 2. The anti-deflection mechanism 3 includes a fixed frame 301 and a guide rod 307. The fixed frame 301 is fixed to the top of the processing table 1 by screws, and a bearing seat adapted to the screw rod 303 is provided inside it to ensure the smooth rotation of the screw rod 303.The outer side of the processing table 1 is equipped with a second motor 302. The output end of the second motor 302 is fixedly connected to a screw rod 303. The screw rod 303 adopts a high-precision trapezoidal thread and cooperates with the internal thread of the thread block 304 to achieve precise linear motion conversion. One end of the screw rod 303 is rotatably connected to the inner side of the fixed frame 301. The outer side of the screw rod 303 is threadedly connected to the thread block 304. Guide sliders are provided on both sides of the thread block 304, which cooperate with the guide grooves inside the fixed frame 301 to further limit the movement trajectory of the thread block 304 and prevent it from deflecting during movement. The outer side of the thread block 304 is slidably connected to the inner side of the fixed frame 301. The outer side of the thread block 304 is fixedly connected to the movable plate 305. The inclined angle of the trapezoidal groove 306 of the movable plate 305 is optimized to ensure that when the movable plate 305 moves, it can push the two anti-deflection plates 308 towards each other with appropriate thrust, while ensuring the stability of the anti-deflection plates 308 during movement. The guide rod 307 is fixedly connected to the top of the processing table 1, and its two ends are fixed by fixed seats, and the surface is coated with a wear-resistant layer. The outer side of the guide rod 307 is slidably connected to two anti-deflection plates 308. The two anti-deflection plates 308 are mounted on the guide rod 307 through linear bearings, so that the anti-deflection plates 308 can slide smoothly on the guide rod 307. The bottom of the anti-deflection plate 308 is slidably connected to the top of the processing table 1. A trapezoidal groove 306 is provided on the outer side of the movable plate 305, and the inner side of the trapezoidal groove 306 is slidably connected to the outer sides of the two anti-deflection plates 308.

[0022] Specifically, first, the bottom of the horn body 2 is precisely placed into the through-hole 4. Since the through-hole 4 matches the shape of the bottom of the horn body 2, initial positioning can be achieved, reducing the workload of subsequent adjustments. At the same time, one of the irregularly shaped corners of the horn body 2 is positioned between the two anti-deflection plates 308. This position determination lays the foundation for subsequent angle limiting. Then, the second motor 302 is started, which drives the screw 303 to rotate. The screw 303 uses a high-precision trapezoidal thread that cooperates with the internal thread of the thread block 304. This converts the rotational motion of the second motor 302 into the linear motion of the thread block 304, so that the thread block 304 drives the movable plate 305 to move. During movement, the guide slides on either side of the threaded block 304 cooperate with the guide grooves inside the fixed frame 301, ensuring the accuracy of the motion trajectory and preventing deviation. When the movable plate 305 moves, the inclined surface of the trapezoidal groove 306 on its outer side contacts the two anti-deflection plates 308. Due to the optimized angle of the inclined surface of the trapezoidal groove 306, the two anti-deflection plates 308 are pushed together with appropriate thrust. The two anti-deflection plates 308 are mounted on the guide rod 307 via linear bearings. Guided by the guide rod 307, they slide smoothly, ultimately restraining the outer side of the horn body 2. At this point, the horizontal angle of the horn body 2 is precisely locked, preventing deviation. This ensures the stability of the angle of the horn body 2 during machining and prevents machining errors caused by angular deviation. Motor 1 5 is then started. The speed of motor 1 5 can be adjusted by a frequency converter according to actual machining requirements to ensure that cylindrical gear 1 6 rotates at the appropriate speed. After motor 15 drives cylindrical gear 16 to rotate, the gear ring 9, which meshes with the outer side of cylindrical gear 16, also rotates. As gear ring 9 rotates, the four cylindrical gears 2 13, evenly distributed inside the fixed ring 7 and with their axes radially aligned with the center of the fixed ring 7, can synchronously drive the four cylindrical gears 2 13 to rotate. The rotation of cylindrical gear 2 13 causes the four rack plates 15 meshing with its outer sides to move toward the center. The rack plates 15 slide within the sliding holes 14. The lubrication grooves on the inner walls of the sliding holes 14 reduce friction during sliding, ensuring motion accuracy and service life. When the four rack plates 15 drive the four clamping plates 16 toward the center, the non-slip rubber pads bonded to the inner surfaces of the clamping plates 16 come into contact with the horn body 2. This increases friction, preventing the horn body 2 from slipping during the clamping process, and also acts as a buffer, preventing the clamping plates 16 from damaging the surface of the horn body 2. Finally, the four clamps 16 clamp the bottom of the ram horn body 2, and the clamping force of the clamps 16 on the ram horn body 2 is detected by the pressure sensor to ensure that the clamping force is within the appropriate range. This can not only ensure that the ram horn body 2 is stable, but also will not be deformed due to excessive clamping force, thereby achieving the stable clamping of the special-shaped ram horn body 2 and providing a stable and reliable foundation for subsequent high-precision hole processing.

[0023] Working principle: First, place the bottom of the ram horn body 2 into the through hole 4, and let one of the special-shaped corners of the ram horn body 2 be located in the middle position of the two anti-deflection plates 308, then start the motor 2 302 to drive the screw 303 to rotate, so that the threaded block 304 drives the movable plate 305 to move, so that the inclined surface of the trapezoidal groove 306 will contact the two anti-deflection plates 308, so that the two anti-deflection plates 308 are close to each other, and then the two anti-deflection plates 308 will limit the outside of the ram horn body 2, so that the angle of the ram horn body 2 will not be able to deviate, and then start the motor 1 5 to drive the cylindrical gear 1 6 to rotate, and then the gear ring 9 will rotate, which will drive the four cylindrical gears 2 13 to rotate, and then the four rack plates 15 will move closer to the center position, so that the four clamps 16 will clamp the bottom of the ram horn body 2, so as to clamp the special-shaped ram horn body 2 firmly, which is convenient for subsequent hole processing.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for machining rear clevis holes of automobiles, comprising a machining table (1), characterized in that: A ram horn body (2) is provided on the top of the processing table (1), an anti-deflection mechanism (3) is provided on the top of the processing table (1), a through hole (4) is provided inside the processing table (1), a clamping mechanism is provided inside the processing table (1), the clamping mechanism includes a driving component and a positioning component, the driving component includes a motor 1 (5), the motor 1 (5) is installed at the bottom of the processing table (1), the output end of the motor 1 (5) is fixedly connected to a cylindrical gear 1 (6), and the cylindrical gear 1 (6) is located inside the processing table (1).

2. The automobile rear clevis hole processing fixture according to claim 1, characterized in that: The positioning assembly comprises a fixing ring (7), the fixing ring (7) being fixedly connected to the inner wall of the internal cavity of the processing table (1), the top of the fixing ring (7) being fixedly connected to two limiting columns (8), the tops of the limiting columns (8) being fixedly connected to the inner wall of the processing table (1).

3. The automobile rear clevis hole processing fixture according to claim 2, characterized in that: A gear ring (9) is provided on the top of the fixing ring (7), two arc-shaped grooves (10) are provided inside the gear ring (9), and the outer side of the limiting column (8) is slidably connected to the inner side of the arc-shaped groove (10).

4. The automobile rear clevis hole processing fixture according to claim 3, characterized in that: The outer side of the gear ring (9) meshes with the outer side of the cylindrical gear 1 (6), and the interior of the processing table (1) is rotatably connected to four cylindrical gears 2 (13), and the outer side of the cylindrical gear 2 (13) meshes with the inner side of the gear ring (9).

5. The automobile rear clevis hole processing fixture according to claim 4, characterized in that: A plurality of connecting rods (11) are fixedly connected to the inner side of the fixing ring (7), one end of each of the connecting rods (11) is fixedly connected to a circular ring (12), and a sliding hole (14) is provided inside the circular ring (12) and the fixing ring (7).

6. The automobile rear clevis hole processing fixture according to claim 5, characterized in that: The interior of the sliding hole (14) is slidably connected to a rack plate (15), and the outer side of the rack plate (15) is meshed with the outer side of the cylindrical gear 2 (13).

7. The automobile rear clevis hole processing fixture according to claim 6, characterized in that: One end of the rack plate (15) is fixedly connected to a clamping plate (16), and the outer side of the clamping plate (16) is in contact with the outer side of the horn body (2).

8. The automobile rear clevis hole processing fixture according to claim 1, characterized in that: The anti-deflection mechanism (3) comprises a fixed frame (301) and a guide rod (307). The bottom of the fixed frame (301) is fixedly connected to the top of the processing table (1). A second motor (302) is installed on the outside of the processing table (1).

9. The automobile rear clevis hole processing fixture according to claim 8, characterized in that: The output end of the second motor (302) is fixedly connected to a screw rod (303), one end of the screw rod (303) is rotatably connected to the inner side of the fixed frame (301), the outer side of the screw rod (303) is threadedly connected to a threaded block (304), the outer side of the threaded block (304) is slidably connected to the inner side of the fixed frame (301), and the outer side of the threaded block (304) is fixedly connected to a movable plate (305).

10. The automobile rear clevis hole processing fixture according to claim 9, characterized in that: The guide rod (307) is fixedly connected to the top of the processing table (1), the outer side of the guide rod (307) is slidably connected to two anti-deflection plates (308), the bottom of the anti-deflection plate (308) is slidably connected to the top of the processing table (1), and the outer side of the movable plate (305) is provided with a trapezoidal groove (306), and the inner side of the trapezoidal groove (306) is slidably connected to the outer sides of the two anti-deflection plates (308).

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