A piston pin hole machining fixture
The clamping structure, which combines horizontal and vertical limiting components, solves the problems of incompatibility of existing piston pin hole machining fixtures with special-shaped piston seats and cumbersome replacement of clamping blocks, and achieves flexible fixing and efficient machining of different piston seats.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN YOUFU NEW ENERGY TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-07
AI Technical Summary
Existing piston pin hole machining fixtures are not well-suited for clamping piston seats with special shapes, and the replacement of clamping blocks is cumbersome, making it impossible to effectively fix the piston.
The clamping structure adopts a combination of horizontal and vertical limiting components. The first and second telescopic devices restrict the workpiece in the horizontal and vertical directions, respectively. The rotating cylinder drives the limiting block to slide, realizing the quick replacement of the clamping block. The locking block cooperates with the limiting groove to achieve stable clamping.
It enables flexible clamping and fixing of piston seats of different sizes and shapes, simplifies the clamping block replacement process, and improves processing efficiency and applicability.
Smart Images
Figure CN224464211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of piston pin hole machining technology, specifically to a piston pin hole machining fixture. Background Technology
[0002] The piston is a key component of the engine and plays an extremely important role in starting the engine. The piston is generally used to withstand gas pressure and drives the crankshaft to rotate through the connecting rod via the piston pin.
[0003] Chinese Patent Publication No. CN222243630U discloses a piston pin hole machining fixture, relating to the field of refrigerator refrigeration compressor technology. This utility model includes a worktable assembly, a clamping assembly, and a pressing assembly. The worktable assembly includes a worktable body, with support plates fixedly connected to the top of both sides of the worktable body. A first motor is fixedly connected to the top of each support plate, and first threaded rods are fixedly connected to the output ends of two first motors on opposite sides. Threaded sleeves are fitted onto the surfaces of both first threaded rods. The clamping assembly is located within the inner cavity of the worktable body and includes a lifting plate, with movable boxes fitted onto both sides of the lifting plate. This utility model, by setting up the worktable assembly, can support the workpiece; by setting up the clamping assembly, can clamp the workpiece from both sides; and by setting up the pressing assembly, can press the workpiece. It can not only adjust the fixation in multiple directions but also fix the workpiece in multiple directions.
[0004] In the above solution, the workpiece can be clamped on both sides by setting the clamping component, and the workpiece can be clamped by setting the pressing component. It can not only adjust the fixation in multiple directions, but also fix the workpiece in multiple directions. However, when using this structure, the piston seat is clamped only by the clamping block with the V-shaped surface. When facing some piston seats with special shapes, the clamping block cannot be adapted, and the replacement of the clamping block is relatively cumbersome. Utility Model Content
[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a piston pin hole machining fixture.
[0006] The technical solution of this utility model is as follows: A piston pin hole machining fixture includes a worktable body connected to a baffle; a clamping assembly connected to the worktable body, the clamping assembly including a horizontal limiting assembly and a vertical limiting assembly, two horizontal limiting assemblies symmetrically arranged, the horizontal limiting assemblies being connected to the worktable body, the number of vertical limiting assemblies corresponding to the horizontal limiting assemblies, the vertical limiting assemblies being connected to the horizontal limiting assemblies, the horizontal limiting assembly including a first telescopic device, a mounting plate, a clamping block, and a locking member, the first telescopic device being connected to the worktable body, the telescopic end of the first telescopic device being connected to the mounting plate, the vertical limiting assemblies being connected to the mounting plate, the mounting plate being slidably connected to the clamping block, the locking member being connected to the mounting plate, the locking member consisting of a fixed cylinder, a rotating cylinder, and a... The clamping assembly consists of an adjusting handle, an elastic element, a limiting block, and a locking block. The fixed cylinder is connected to a blind hole in the mounting plate. Multiple L-shaped limiting grooves are provided on the inner wall of the fixed cylinder. The rotating cylinder is slidably connected inside the fixed cylinder, and the rotating cylinder and the fixed cylinder are nested together. A limiting block that slidably connects to the limiting groove is connected to the outer wall of the rotating cylinder. The adjusting handle and the locking block are connected to the top of the rotating cylinder. The adjusting handle and the locking block are arranged parallel to each other vertically. The elastic element is connected to the fixed cylinder, and one end of the elastic element contacts the rotating cylinder. When the clamping assembly is in use, the first telescopic device pushes the clamping block and the vertical limiting assembly to move horizontally, thereby limiting the position of the workpiece by horizontal and vertical means. The rotation of the rotating cylinder causes the limiting block to slide in the limiting groove. The locking block rotates with the rotating cylinder to facilitate the vertical installation and removal of the clamping block.
[0007] Preferably, the mounting plate has a T-slot, and the clamping blocks are connected to T-blocks on the side of the mounting plate closest to the clamping block.
[0008] Preferably, the pressure level limiting assembly also includes guide rods, two of which are arranged in parallel, symmetrically arranged on both sides of the first telescopic device, with one end of the guide rod connected to the mounting plate; and guide seats, the number of which corresponds to the number of guide rods, and the guide seats are slidably connected to the guide rods.
[0009] Preferably, the outer side of the guide rod is fitted with a bellows protective cover, and the two ends of the protective cover are connected to the guide seat and the mounting plate, respectively.
[0010] Preferably, the pressure adjustment handle has a through hole, and the inner wall of the through hole has multiple grooves that engage with the protrusions on the rotating cylinder.
[0011] Preferably, the vertical limiting component includes a mounting block connected to a mounting plate; and a second telescopic device connected to the mounting block, with a pressure plate connected to the telescopic end of the second telescopic device.
[0012] Preferably, the pressure plate is connected to a protective pad on the side near the clamping block.
[0013] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:
[0014] In this invention, when the telescopic end of the first telescopic device extends or retracts, it causes the mounting plate and clamping block to move closer together, thus restricting the horizontal movement of the workpiece. At the same time, the vertical limiting component also moves synchronously with the mounting plate. The extension or retraction of the telescopic end of the second telescopic device causes the pressure plate to press down and restrict the vertical movement of the workpiece. When the rotating cylinder on the mounting plate rotates, its locking block rotates synchronously and loses its restriction on the clamping block. The clamping block can be removed from the mounting plate for replacement, making it convenient to clamp and fix workpieces of different sizes and shapes. Attached Figure Description
[0015] Figure 1 This is a perspective view of the present utility model;
[0016] Figure 2 Exploded view of the clamping components;
[0017] Figure 3 for Figure 2 Enlarged view of the structure at point A;
[0018] Figure 4 for Figure 2 Enlarged view of the structure at point B.
[0019] Reference numerals: 1. Main body of the workbench; 2. Baffle; 3. First telescopic device; 4. Mounting plate; 5. Clamping block; 6. Locking component; 7. Fixed cylinder; 8. Rotating cylinder; 9. Adjusting handle; 10. Elastic component; 11. Limiting block; 12. Locking block; 13. Limiting groove; 14. T-slot; 15. T-block; 16. Guide rod; 17. Guide seat; 18. Bellows protective cover; 19. Groove; 20. Protrusion; 21. Mounting block; 22. Second telescopic device; 23. Pressure plate. Detailed Implementation
[0020] Example 1
[0021] like Figures 1-4As shown, this utility model proposes a piston pin hole machining fixture, characterized in that it includes a worktable body 1, a baffle 2, and a clamping assembly. The worktable body 1 is connected to the baffle 2; the clamping assembly is connected to the worktable body 1 and includes a horizontal limiting assembly and a vertical limiting assembly. Two horizontal limiting assemblies are symmetrically arranged and connected to the worktable body 1. The number of vertical limiting assemblies corresponds to the number of horizontal limiting assemblies, and the vertical limiting assemblies are connected to the horizontal limiting assemblies. The horizontal limiting assembly includes a first telescopic device 3, a mounting plate 4, a clamping block 5, and a locking member 6. The first telescopic device 3 is connected to the worktable body 1; the first telescopic device 3 may be, but is not limited to, a hydraulic cylinder; the telescopic end of the first telescopic device 3 is connected to the mounting plate 4, the vertical limiting assembly is connected to the mounting plate 4, the mounting plate 4 is slidably connected to the clamping block 5, and the locking member 6 is connected to the mounting plate 4. The locking member 6 consists of a fixed cylinder 7, a rotating cylinder 8, and an adjusting cylinder 9. The clamping assembly consists of a handle 9, an elastic element 10, a limiting block 11, and a locking block 12. A fixed cylinder 7 is connected to a blind hole on the mounting plate 4. Multiple L-shaped limiting grooves 13 are provided on the inner wall of the fixed cylinder 7. A rotating cylinder 8 is slidably connected inside the fixed cylinder 7. The rotating cylinder 8 and the fixed cylinder 7 are nested together. A limiting block 11 that is slidably connected to the limiting groove 13 is connected to the outer wall of the rotating cylinder 8. An adjusting handle 9 and a locking block 12 are connected to the top of the rotating cylinder 8. The adjusting handle 9 and the locking block 12 are arranged parallel to each other vertically. The elastic element 10 is connected to the fixed cylinder 7. The elastic element 10 is selected from, but is not limited to, a spring. One end of the elastic element 10 is in contact with the rotating cylinder 8. When the clamping assembly is in use, the first telescopic device 3 pushes the clamping block 5 and the vertical limiting assembly to move horizontally, thereby limiting the position of the workpiece in the horizontal and vertical directions. The rotating cylinder 8 rotates, causing the limiting block 11 to slide in the limiting groove 13. The locking block 12 rotates with the rotating cylinder 8 to facilitate the vertical installation and removal of the clamping block 5.
[0022] Example 2
[0023] like Figures 2-4 As shown, the piston pin hole machining fixture proposed in this utility model, compared with the first embodiment, further includes a horizontal limiting component including a guide rod 16 and a guide seat 17. There are two guide rods 16 arranged in parallel, and the guide rods 16 are symmetrically arranged on both sides of the first telescopic device 3. One end of the guide rod 16 is connected to the mounting plate 4. The number of guide seats 17 corresponds to the number of guide rods 16, and the guide seats 17 are slidably connected to the guide rods 16.
[0024] In an optional embodiment, a T-slot 14 is provided on the mounting plate 4, and a T-block 15 is connected to each of the clamping blocks 5 on the side near the mounting plate 4; the T-block 15 and the T-slot 14 cooperate to provide a positioning effect.
[0025] In an optional embodiment, a bellows cover 18 is fitted on the outer side of each guide rod 16, and the two ends of the bellows cover are connected to the guide seat 17 and the mounting plate 4 respectively; the bellows cover 18 can prevent metal debris from entering between the guide rod 16 and the guide seat 17 and causing an impact.
[0026] In an optional embodiment, the adjusting handle 9 has a through hole, and the inner wall of the through hole has a plurality of grooves 19. The grooves 19 cooperate with the protrusions 20 on the rotating cylinder 8. When the protrusions 20 slide to the bottom in the grooves 19, the length of the protrusions 20 is limited, so that the adjusting handle 9 can rotate in a position without the protrusions 20, preventing accidental contact.
[0027] Example 3
[0028] like Figure 2 As shown, the piston pin hole machining fixture proposed in this utility model, compared with Embodiment 2, further includes a vertical limiting component including a mounting block 21, a second telescopic device 22 and a pressure plate 23. The mounting block 21 is connected to the mounting plate 4, the second telescopic device 22 is connected to the mounting block 21, and the telescopic end of the second telescopic device 22 is connected to the pressure plate 23; the second telescopic device 22 is selected from, but is not limited to, a hydraulic cylinder.
[0029] In an optional embodiment, the pressure plate 23 is connected to a protective pad on the side near the clamping block 5; the protective pad is selected from, but is not limited to, a rubber layer, to prevent compression from causing damage to the weak structure.
[0030] In this invention, during clamping and positioning, the worker places the workpiece on the main body 1 of the workbench and, driven by the first telescopic device 3, moves the clamping blocks 5 closer together. The V-shaped clamping surface of the workpiece has a circular piston seat for clamping and fixing. Simultaneously, the second telescopic device 22 moves the pressure plate 23 downward to contact one end of the piston seat, restricting its vertical movement. The piston seat is restricted in multiple directions, facilitating processing. The baffle 2, installed during processing, can block the drill bit, preventing personnel or objects from approaching the clamping blocks 5 and the drill bit. When clamping and fixing irregularly shaped piston seats, the pressure plate 23 is raised before operation. When the operator pulls the adjusting handle 9, it moves along the rotating cylinder 8. The rotating cylinder 8 rotates through the cooperation of the groove 19 and the protrusion 20. The limiting block 11 on the rotating cylinder 8 moves in the L-shaped limiting groove 13. The elastic element 10 pushes it upward. After the locking block 12 rotates a certain angle, it moves away from the clamping block 5. At this time, it loses the restriction in the vertical direction of the clamping block 5, so it can be replaced. When it is locked, the adjusting handle 9 is pressed down to compress the elastic element 10 and rotate into the L-shaped limiting groove 13 to lock itself. After the external force is lost, the adjusting handle 9 slides down away from the protrusion 20. At this time, the rotation cannot drive the rotating cylinder 8 to rotate, which avoids accidental contact to a certain extent.
[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. A piston pin hole machining fixture, characterized in that, include The main body of the workbench (1) is connected to a baffle (2); The clamping assembly is connected to the worktable body (1). The clamping assembly includes a horizontal limiting assembly and a vertical limiting assembly. There are two horizontal limiting assemblies symmetrically arranged. The horizontal limiting assemblies are connected to the worktable body (1). The number of vertical limiting assemblies corresponds to the number of horizontal limiting assemblies. The vertical limiting assemblies are connected to the horizontal limiting assemblies. The horizontal limiting assembly includes a first telescopic device (3), a mounting plate (4), a clamping block (5), and a locking member (6). The first telescopic device (3) is connected to the worktable body (1). The telescopic end of the first telescopic device (3) is connected to the mounting plate (4). The vertical limiting assembly is connected to the mounting plate (4). The mounting plate (4) is slidably connected to the clamping block (5). The locking member (6) is connected to the mounting plate (4). The locking member (6) is formed by... The assembly consists of a fixed cylinder (7), a rotating cylinder (8), an adjusting handle (9), an elastic element (10), a limiting block (11), and a locking block (12). The fixed cylinder (7) is connected to a blind hole on the mounting plate (4). Multiple L-shaped limiting grooves (13) are provided on the inner wall of the fixed cylinder (7). The rotating cylinder (8) is slidably connected to the fixed cylinder (7). The rotating cylinder (8) and the fixed cylinder (7) are nested together. A limiting block (11) that is slidably connected to the limiting groove (13) is connected to the outer wall of the rotating cylinder (8). An adjusting handle (9) and a locking block (12) are connected to the top of the rotating cylinder (8). The adjusting handle (9) and the locking block (12) are arranged parallel to each other. The elastic element (10) is connected to the fixed cylinder (7). One end of the elastic element (10) is in contact with the rotating cylinder (8). When the clamping assembly is in use, the first telescopic device (3) pushes the clamping block (5) and the vertical limiting assembly to move horizontally, thereby limiting the position of the workpiece in the horizontal and vertical directions. The rotating cylinder (8) rotates and drives the limiting block (11) to slide in the limiting groove (13). The locking block (12) rotates with the rotating cylinder (8) to facilitate the vertical installation and removal of the clamping block (5).
2. The piston pin hole machining fixture according to claim 1, characterized in that, The mounting plate (4) has a T-slot (14), and the clamping block (5) is connected to a T-block (15) on the side near the mounting plate (4).
3. A piston pin hole machining fixture according to claim 1, characterized in that, The horizontal limit component also includes There are two guide rods (16) arranged in parallel. The guide rods (16) are symmetrically arranged on both sides of the first telescopic device (3). One end of the guide rod (16) is connected to the mounting plate (4). The number of guide seats (17) corresponds to the number of guide rods (16), and the guide seats (17) and guide rods (16) are slidably connected.
4. A piston pin hole machining fixture according to claim 3, characterized in that, The guide rod (16) is fitted with a bellows cover (18) on the outside. The two ends of the wall protection cover are connected to the guide seat (17) and the mounting plate (4) respectively.
5. A piston pin hole machining fixture according to claim 1, characterized in that, The adjusting handle (9) has a through hole, and the inner wall of the through hole has multiple grooves (19), which are matched with the protrusions (20) on the rotating cylinder (8).
6. A piston pin hole machining fixture according to claim 1, characterized in that, Vertical limiting components include Mounting block (21), which is connected to mounting plate (4); The second telescopic device (22) is connected to the mounting block (21), and the telescopic end of the second telescopic device (22) is connected to the pressure plate (23).
7. A piston pin hole machining fixture according to claim 6, characterized in that, Protective pads are connected to the side of the pressure plate (23) near the clamping block (5).