Positioning clamp for automobile part machining
The positioning fixture, with its bidirectional screw drive and air-blowing port design, solves the problems of poor adaptability and difficult debris removal of existing positioning fixtures, achieving high-precision and safe parts processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DEXI AUTO PARTS CO LTD
- Filing Date
- 2025-10-16
- Publication Date
- 2026-07-28
AI Technical Summary
Existing positioning fixtures are difficult to adapt to parts of different specifications, resulting in poor machining results and difficulty in cleaning drilling debris, which affects machining accuracy and safety.
A positioning fixture for processing automotive parts was designed. It uses a bidirectional screw drive to precisely control the movement of the clamping blocks, is equipped with an air blowing port to clean up debris, and uses elastic blocks and rubber pads to achieve flexible clamping to prevent damage to the parts.
It improves the versatility of clamping and machining accuracy, reduces the risk of chip clogging, enhances machining efficiency and safety, and protects the surface quality of parts.
Smart Images
Figure CN224560585U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive parts processing technology, specifically a positioning fixture for automotive parts processing. Background Technology
[0002] In the automotive manufacturing industry, the precision of parts processing directly determines the overall vehicle assembly quality and driving safety. With the diversification of car models, the structural design of parts is becoming increasingly complex, covering a variety of irregular and thin-walled parts, including engine blocks, gearbox housings, and chassis connecting parts.
[0003] As a core auxiliary device in the parts processing process, the positioning fixture's positioning stability, accuracy, and adaptability have a crucial impact on processing efficiency and finished product qualification rate. In use, the parts are placed on top of the positioning fixture, and then the positioning fixture is operated to clamp and fix the parts.
[0004] However, in the existing technology, most positioning fixtures are fixed and cannot achieve the clamping effect for parts of different specifications, resulting in poor practicality and difficulty in adjusting according to the size of parts of different specifications, thus affecting the processing effect. Therefore, a positioning fixture for processing automotive parts is proposed to address the above problems. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a positioning fixture for processing automotive parts.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A positioning fixture for processing automotive parts, comprising a fixed base; a slot is formed in the side wall of the fixed base; a bidirectional screw is rotatably connected to the side wall of the slot and penetrates the wall of the fixed base; a pair of connecting blocks are threadedly connected to the side wall of the bidirectional screw; the connecting blocks are symmetrically arranged on both sides of the bidirectional screw and have the same structure; the connecting blocks and the slot are in sliding fit; a clamping block is fixedly connected to the side wall of the connecting block; multiple grooves are formed in the side wall of the clamping block; the grooves are evenly distributed on the side wall of the clamping block and have the same structure; a spring rod is fixedly connected to the side wall of the groove; an elastic block is fixedly connected to the end of the spring rod.
[0007] Preferably, the top of the fixed base is provided with an air blowing port; the side wall of the air blowing port is provided with a drainage groove that penetrates the wall of the fixed base; a rotating rod is rotatably connected to the side wall of the air blowing port; and multiple blades are uniformly fixed to the side wall of the rotating rod.
[0008] Preferably, a pair of spring rods are symmetrically fixed to the side wall of the fixed base; the ends of the two spring rods are fixed to the same insert plate; the side wall of the bidirectional screw is evenly provided with multiple slots; the insert plate and the slots are in sliding fit.
[0009] Preferably, a pair of baffles are fixedly connected to the side wall of the fixed seat; the baffles are symmetrically arranged on both sides of the fixed seat and have the same structure; the side wall of the baffle is provided with a sliding groove; the side wall of the sliding groove is slidably connected to an extension plate; a pair of telescopic rods are symmetrically fixed between the extension plate and the baffle.
[0010] Preferably, the elastic block has multiple top plates hinged to its sidewall; the top plates are evenly distributed on the sidewall of the elastic block and have the same structure; and the sidewall of each top plate is fixed with a rubber pad.
[0011] Preferably, a pair of anti-slip strips are symmetrically fixed to the side wall of the clamping block.
[0012] The beneficial effects of this utility model are: 1. This utility model provides a positioning fixture for processing automotive parts. The bidirectional screw drive provides smooth transmission and high precision, accurately controlling the movement distance of the two clamping blocks to prevent clamping offset, ensuring drilling position accuracy, increasing the clamping effect on parts of different sizes, and improving versatility. Simultaneously, the cooperation between the spring rod and the elastic block compensates for minor surface errors of the parts through elastic deformation, further enhancing clamping stability. Multiple grooves and elastic blocks are evenly distributed on the sidewalls of the clamping blocks, adapting to automotive parts of different shapes and sizes, eliminating the need for frequent fixture changes and improving equipment versatility. The elastic blocks are soft and elastic, avoiding rigid contact with the part surface during clamping, preventing damage and scratches, and protecting the appearance and precision of the parts.
[0013] 2. This utility model provides a positioning fixture for processing automotive parts. Through the set air blowing port, drilling debris is cleaned in real time, preventing debris from getting stuck between the drill bit and the part, which would cause drilling size deviation, rough hole wall, or scratches on the processed surface, thus improving the drilling quality. There is no need to stop the machine to clean the debris manually, reducing processing interruption time. At the same time, it reduces the heat generated during drilling, improves the processing accuracy of the parts, and increases the heat dissipation speed. Attached Figure Description
[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the clamping block in this utility model; Figure 3 This is a perspective view of the elastic block in this utility model; Figure 4 This is a perspective view of the blade in this utility model.
[0015] Legend: 1. Fixed base; 11. Slot; 12. Double-acting screw; 13. Connecting block; 14. Clamping block; 15. Groove; 16. Spring rod one; 17. Elastic block; 2. Air inlet; 21. Drainage channel; 22. Rotating rod; 23. Blade; 3. Spring rod two; 31. Insert plate; 32. Slot; 4. Baffle; 41. Slide groove; 42. Extension plate; 43. Telescopic rod; 5. Top plate; 51. Rubber pad; 6. Anti-slip strip. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0017] Specific implementation examples are given below.
[0018] Please see Figures 1-4This utility model provides a positioning fixture for processing automotive parts, including a fixed base 1; the fixed base 1 has a slot 11 on its side wall; a bidirectional screw 12 is rotatably connected to the side wall of the slot 11 and passes through the wall of the fixed base 1; a pair of connecting blocks 13 are threadedly connected to the side wall of the bidirectional screw 12; the connecting blocks 13 are symmetrically arranged on both sides of the bidirectional screw 12 and have the same structure; the connecting blocks 13 and the slot 11 are in sliding fit; a clamping block 14 is fixedly connected to the side wall of the connecting block 13; the clamping block 14 has a plurality of grooves 15 on its side wall; the grooves 15 are evenly distributed on the sidewall of the clamping block 14 and have the same structure; a spring rod 16 is fixedly connected to the sidewall of the groove 15; an elastic block 17 is fixedly connected to the end of the spring rod 16; in use, the operator rotates the bidirectional screw 12. Since the threads on both sides of the bidirectional screw 12 turn in opposite directions, and the pair of connecting blocks 13 connected to its sidewall are in sliding fit with the slot 11, the rotation of the bidirectional screw 12 will drive the two connecting blocks 13 to move towards or away from each other along the slot 11. When the connecting blocks 13 move towards each other, the clamping block 14 fixed to its sidewall will gradually approach the part to be processed. The automotive parts are clamped until the elastic block 17 in the groove 15 on the side wall of the clamping block 14 contacts the surface of the part. As the bidirectional screw 12 continues to rotate, the elastic block 17 is compressed, which pushes the spring rod 16 fixed to it to contract. The elastic reaction force of the spring rod 16 makes the elastic block 17 fit tightly against the surface of the part, ultimately achieving stable clamping of the part. In this process, the bidirectional screw 12 transmission has the characteristics of smooth transmission and high precision, which can accurately control the movement distance of the two clamping blocks 14, avoid clamping deviation, ensure drilling position accuracy, and increase the protection against non-component interference. The clamping effect of parts of the same specification and size is improved, enhancing versatility. At the same time, the cooperation between the spring rod 16 and the elastic block 17 can compensate for minor errors on the surface of the parts through elastic deformation, further improving clamping stability. Multiple grooves 15 and elastic blocks 17 are evenly distributed on the side wall of the clamping block 14, which can adapt to automotive parts of different shapes and sizes, eliminating the need for frequent clamping changes and improving the versatility of the equipment. The elastic block 17 is soft and elastic, avoiding rigid contact with the surface of the parts during clamping, preventing the surface of the parts from being pinched or scratched, and protecting the appearance and precision of the parts.
[0019] Furthermore, such as Figures 1-4As shown, the top of the fixed base 1 has an air inlet 2; the side wall of the air inlet 2 has a guide groove 21 that penetrates the wall of the fixed base 1; a rotating rod 22 is rotatably connected to the side wall of the air inlet 2; multiple blades 23 are evenly fixed to the side wall of the rotating rod 22; during use, the parts are drilled during processing, which generates a large amount of metal debris. An external air source is connected through the guide groove 21, and the high-pressure airflow generated by the air source enters the air inlet 2 through the guide groove 21 and blows it towards the drilling area, blowing the debris generated during drilling away from the surface of the parts and the drilling position. At the same time, the airflow can also reduce the heat generated during drilling and improve the efficiency of the parts. The heat dissipation rate between the part and the drill bit is improved. The rotating rod 22, which is rotatably connected to the side wall of the air outlet 2, will rotate under the impact of the airflow. Multiple blades 23, which are uniformly fixed to the side wall of the rotating rod 22, rotate synchronously with the rotating rod 22. The rotation of the blades 23 can disturb the airflow direction and expand the airflow coverage. During this process, drilling debris is cleaned in real time to prevent debris from getting stuck between the drill bit and the part, which may cause drilling size deviation, rough hole wall, or scratches on the machined surface, thus improving the drilling quality. There is no need to stop the machine to clean the debris manually, reducing the processing interruption time. At the same time, the heat generated during drilling is reduced, the machining accuracy of the part is improved, and the heat dissipation rate is increased.
[0020] Furthermore, such as Figures 1-4 As shown, a pair of spring rods 3 are symmetrically fixed to the side wall of the fixed base 1; the ends of the spring rods 3 are fixed to the same insert plate 31; the side wall of the bidirectional screw 12 is evenly provided with multiple slots 32; the insert plate 31 and the slots 32 are in sliding fit; in use, when the bidirectional screw 12 rotates to the point where the clamping block 14 clamps the parts, the insert plate 31 will be inserted into the multiple slots 32 evenly provided on the side wall of the bidirectional screw 12 under the action of the spring rods 3, and the rotation of the bidirectional screw 12 is restricted by the sliding fit between the insert plate 31 and the slots 32. This achieves locking of the bidirectional screw 12. If the clamping state needs to be adjusted, simply push the insert plate 31 away from the bidirectional screw 12 to disengage the insert plate 31 from the slot 32, and the bidirectional screw 12 can be rotated again. During this process, the bidirectional screw 12 is effectively prevented from rotating on its own, and the clamping block 14 is prevented from loosening during processing vibration. This ensures that the parts remain stably positioned throughout the entire processing process, reducing the scrap rate. The locking and unlocking process only requires pulling or releasing the insert plate 31, without the need for tools. The operation is simple and quick, reducing the workload of the operators.
[0021] Furthermore, such as Figures 1-4As shown, a pair of baffles 4 are fixedly connected to the side wall of the fixed base 1; the baffles 4 are symmetrically arranged on both sides of the fixed base 1 and have the same structure; the side wall of the baffle 4 is provided with a sliding groove 41; the side wall of the sliding groove 41 is slidably connected to an extension plate 42; a pair of telescopic rods 43 are symmetrically fixed between the extension plate 42 and the baffles 4; in use, the pair of baffles 4 symmetrically fixed to the side wall of the fixed base 1 can prevent drill debris from splashing to both sides, while protecting the operator's hands from accidental drill bit injury, and the extension plate 42 can be pulled according to the usage scenario, and the pair of telescopic rods 43 symmetrically fixed between the extension plate 42 and the baffles 4 The extension plate 42 will extend as it moves until it reaches a suitable length, thereby increasing the coverage area for debris. When not in use, the extension plate 42 can be pushed to retract the telescopic rod 43, and the extension plate 42 will retract into the slide groove 41, thus flexibly adjusting the protection range of the baffle 4. During this process, the baffle 4 can block the splashing of debris, reducing the amount of debris splashing to the surroundings and increasing the workload of cleaning. At the same time, the cooperation between the telescopic rod 43 and the extension plate 42 can increase the coverage area and improve processing safety. When not in use, the extension plate 42 can be retracted to reduce the overall space occupied by the fixture.
[0022] Furthermore, such as Figures 1-4 As shown, the elastic block 17 has multiple top plates 5 hinged to its sidewalls; the top plates 5 are evenly distributed on the sidewalls of the elastic block 17 and have the same structure; rubber pads 51 are fixed to the sidewalls of the top plates 5; in use, when the elastic block 17 contacts the surface of the component, since the top plates 5 are hinged to the elastic block 17, the multiple top plates 5 will automatically adjust their tilt angle according to the contour of the component surface, so that the rubber pads 51 fixed to the sidewalls of each top plate 5 can fit against the surface of the component, forming a multi-point contact clamping. The elasticity and friction of the rubber pads 51 can further enhance the clamping effect. As a result, while avoiding damage caused by rigid contact between the top plate 5 and the surface of the parts, the hinged design of multiple top plates 5 can fit the surface of irregular parts, solving the problem of unstable clamping of irregular parts by traditional fixtures, expanding the applicability of the fixture, dispersing the clamping force through multiple points of contact, avoiding excessive force on a single point that could cause deformation of the parts, and increasing friction with the rubber pad 51 to prevent the parts from sliding during processing. The rubber pad 51 is soft and can buffer the clamping force, preventing indentations and scratches on the surface of the parts, making it especially suitable for automotive parts with high surface precision requirements.
[0023] Furthermore, such as Figures 1-4As shown, a pair of anti-slip strips 6 are symmetrically fixed to the side wall of the clamping block 14. In use, the pair of anti-slip strips 6 symmetrically fixed to the side wall of the clamping block 14 are made of rubber with a high coefficient of friction. When the clamping block 14 clamps the automotive parts, the anti-slip strips 6 will directly contact the surface of the parts. By increasing the friction between the clamping block 14 and the parts, the parts are prevented from sliding due to axial or radial forces during processing. In this process, the high coefficient of friction material and the raised structure work together to greatly increase the friction between the clamping block 14 and the parts, effectively preventing slippage and ensuring processing accuracy. The anti-slip strips 6 are made of wear-resistant rubber, which is not easy to wear after long-term use, can maintain a stable anti-slip effect, and extend the maintenance cycle of the clamp.
[0024] Working principle: When the operator rotates the bidirectional screw 12, the threads on both sides of the bidirectional screw 12 rotate in opposite directions, and the pair of connecting blocks 13 connected to its sidewalls are in sliding fit with the slot 11. The rotation of the bidirectional screw 12 will cause the two connecting blocks 13 to move towards or away from each other along the slot 11. When the connecting blocks 13 move towards each other, the clamping block 14 fixed to its sidewall will gradually approach the automotive part to be processed until the elastic block 17 in the groove 15 on the sidewall of the clamping block 14 contacts the surface of the part. As the bidirectional screw 12 continues to rotate, the elastic block 17 is compressed, which will push the spring rod 16 fixed to it to contract. The elastic reaction force of the spring rod 16 makes the elastic block 17 fit tightly against the surface of the part, ultimately achieving stable clamping of the part. During the processing of parts, drilling is involved, which generates a large amount of metal debris. An external air source is connected through the drainage channel 21, and the high-pressure airflow generated by the air source enters the air outlet 2 through the drainage channel 21 and blows it towards the drilling area, removing the debris from the surface of the parts and the drilling position. Simultaneously, the airflow reduces the heat generated during drilling and increases the heat dissipation rate between the parts and the drill bit. The rotating rod 22, rotatably connected to the side wall of the air outlet 2, rotates under the impact of the airflow. Multiple blades 23, evenly fixed to the side wall of the rotating rod 22, rotate synchronously with the rotating rod 22. The rotation of the blades 23 can disturb the airflow direction and expand the airflow coverage area. In use, when the bidirectional screw 12 rotates until the clamping block 14 clamps the parts, the insert plate 31 will be inserted into the bidirectional screw 12 under the action of the spring rod 23. Multiple slots 32 evenly spaced on the sidewall of the screw 12 restrict the rotation of the bidirectional screw 12 through the sliding engagement of the insert plate 31 with the slot 32, thus locking the bidirectional screw 12. To adjust the clamping state, simply push the insert plate 31 away from the bidirectional screw 12 to disengage it from the slot 32, allowing the bidirectional screw 12 to rotate again. During use, a pair of baffles 4 symmetrically fixed to the sidewall of the fixing base 1 prevent drill debris from splashing to both sides, protecting the operator's hands from accidental drill bit injury. Furthermore, the extension plate 42 can be pulled according to the usage scenario. A pair of telescopic rods 43 symmetrically fixed between the extension plate 42 and the baffles 4 extend with the movement of the extension plate 42 until it reaches a suitable length, thereby increasing the coverage area for debris. When not in use, the extension plate 42 can be pushed to retract the telescopic rod 43, and the extension plate 42 can be retracted into the slide groove 41, realizing flexible adjustment of the protection range of the baffle 4. When in use, when the elastic block 17 contacts the surface of the part, since the top plate 5 and the elastic block 17 are hinged, multiple top plates 5 will automatically adjust their tilt angle according to the contour of the part surface, so that the rubber pads 51 fixed to the side wall of each top plate 5 can fit against the surface of the part, forming a multi-point contact clamping. The elasticity and friction of the rubber pads 51 can further enhance the clamping effect, while avoiding damage caused by rigid contact between the top plate 5 and the surface of the part. When in use, the pair of anti-slip strips 6 symmetrically fixed to the side wall of the clamping block 14 are made of high friction coefficient rubber material. When the clamping block 14 clamps the automotive parts,The anti-slip strip 6 comes into direct contact with the surface of the component, increasing the friction between the clamping block 14 and the component to prevent the component from sliding due to axial or radial forces during processing.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A positioning fixture for machining automotive parts, comprising a fixed base (1); characterized in that: The fixed base (1) has a slot (11) on its side wall; a double-acting screw (12) is rotatably connected to the side wall of the slot (11) and passes through the wall of the fixed base (1); a pair of connecting blocks (13) are threadedly connected to the side wall of the double-acting screw (12); the connecting blocks (13) are symmetrically arranged on both sides of the double-acting screw (12) and have the same structure; the connecting blocks (13) and the slot (11) are in sliding fit; a clamping block (14) is fixedly connected to the side wall of the connecting block (13); a plurality of grooves (15) are opened on the side wall of the clamping block (14); the grooves (15) are evenly distributed on the side wall of the clamping block (14) and have the same structure; a spring rod (16) is fixedly connected to the side wall of the groove (15); an elastic block (17) is fixedly connected to the end of the spring rod (16).
2. The positioning fixture for machining automotive parts as described in claim 1, characterized in that: The top of the fixed base (1) is provided with an air inlet (2); the side wall of the air inlet (2) is provided with a drainage groove (21) that penetrates the wall of the fixed base (1); the side wall of the air inlet (2) is rotatably connected with a rotating rod (22); multiple blades (23) are evenly fixed to the side wall of the rotating rod (22).
3. The positioning fixture for processing automotive parts as described in claim 1, characterized in that: A pair of spring rods (3) are symmetrically fixed to the side wall of the fixed base (1); the ends of the spring rods (3) are fixed to the same insert plate (31); the side wall of the bidirectional screw (12) is evenly provided with multiple slots (32); the insert plate (31) and the slot (32) are in sliding fit.
4. A positioning fixture for machining automotive parts as described in claim 1, characterized in that: A pair of baffles (4) are fixedly connected to the side wall of the fixed seat (1); the baffles (4) are symmetrically arranged on both sides of the fixed seat (1) and have the same structure; the side wall of the baffle (4) is provided with a sliding groove (41); the side wall of the sliding groove (41) is slidably connected with an extension plate (42); a pair of telescopic rods (43) are symmetrically fixed between the extension plate (42) and the baffle (4).
5. A positioning fixture for machining automotive parts as described in claim 1, characterized in that: The elastic block (17) has multiple top plates (5) hinged to its side wall; the top plates (5) are evenly distributed on the side wall of the elastic block (17) and have the same structure; the side wall of the top plate (5) is fixed with a rubber pad (51).
6. A positioning fixture for machining automotive parts as described in claim 1, characterized in that: A pair of anti-slip strips (6) are symmetrically fixed to the side wall of the clamp (14).