Short-stroke rotary pressure chuck
By designing a short-stroke rotary chuck, and utilizing the cooperation of the slide push plate and the limit block, the short-stroke movement and automatic positioning of the pressure claw are achieved, which solves the problem of hand clamping and pressing of traditional chucks, and improves work safety and workpiece stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional chucks have a large travel of the clamping jaws, resulting in an excessive gap between the workpiece and the clamping jaws, which poses a safety hazard of pinching or pressing on the hand.
Design a short-stroke rotary chuck. The slide moves the push plate to the right, and the control rod moves the pressure claw to the right and rotates it. The limit block limits the stroke of the pressure claw, and the positioning ball achieves automatic positioning and stabilization of the workpiece.
This effectively avoids situations where workers' hands are pinched or crushed during loading and unloading, ensuring the safety and stability of workpieces during the chuck loading and unloading process.
Smart Images
Figure CN224058742U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine tools, and in particular to a short-stroke rotary chuck. Background Technology
[0002] A chuck is a mechanical device used on a machine tool to limit the movement of workpieces. It uses the movement of the jaws to release and tighten the workpiece. However, the jaws of a traditional chuck are limited by their own structure, resulting in a large stroke for each movement. In this case, the gap between the workpiece and the jaws will be too large. In addition, the chuck seat used to place the workpiece on the chuck is placed with a clearance fit with the workpiece. This means that when the jaws limit the workpiece, the operator must always hold the workpiece. As a result, the operator's hand can easily slip into the large gap between the workpiece and the jaws, causing the hand to be pinched or crushed, which poses a serious safety hazard. Summary of the Invention
[0003] The present invention aims to solve the existing technical problem by providing a short-stroke rotary chuck, which can not only effectively limit the workpiece, but also effectively prevent workers from getting their hands pinched or crushed when loading and unloading materials.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0005] This utility model discloses a short-stroke rotary chuck, comprising a chuck body, a movable groove at the center of the left end face of the chuck body; a fixed seat matching the movable groove at the left end of the chuck body; a movable hole communicating with the movable groove at the center of the fixed seat; a matching slide block inside the movable hole; a push plate located in the movable groove at the right end of the slide block; a locking seat at the center of the right end face of the chuck body; several telescopic holes communicating with the movable groove at the outer edge of the right end face of the chuck body; a matching rotating rod inside the telescopic hole; a pressing claw at the right end of the rotating rod extending to the right out of the telescopic hole; a workpiece clamped between the pressing claw and the locking seat; a limiting block corresponding to the position of the movable groove at the left end of the rotating rod; and a guide groove matching the push plate on one side of the limiting block.
[0006] The push plate has a sliding arc surface; the guide groove has a guide arc surface that matches the sliding arc surface; the middle part of the guide arc surface is a spiral surface.
[0007] The outer circumferential surface of the push plate is provided with several push parts corresponding to the positions of the rotating rods, and the sliding arc surface is provided on the outer edge of the push plate; the inner wall of one side of the moving hole is provided with a limiting groove; the outer circumferential surface of the slide block is provided with a keyway opposite to the limiting groove; a matching limiting key is provided in the keyway; the outer end of the limiting key protrudes into the limiting groove.
[0008] The chuck body has a guide hole at the center of its right end face that communicates with the movable groove; the slide has a guide shaft at the center of its right end face that matches the guide hole.
[0009] The center of the left end face of the positioning seat is provided with a positioning part that matches the right end opening of the guide hole; the outer edge of the right end face of the positioning seat is provided with several positioning steps that are evenly distributed in a circle; the workpiece is located between the right side wall of the positioning step and the left side wall of the end of the pressure claw; a positioning baffle extends to the right from the outer edge of the positioning step; the side wall of the positioning baffle opposite to the workpiece is provided with several evenly distributed bead holes; the bead holes are provided with matching positioning beads, and the steel balls of the positioning beads press against the outer wall of the workpiece.
[0010] The outer wall of the rotating rod is provided with a spiral-shaped oil storage groove.
[0011] The left sidewall of the push plate is provided with several right positioning holes evenly distributed in a circle; the right end face of the slide is provided with several left positioning holes opposite to the right positioning holes; a positioning pin is provided between the bottom of the left positioning hole and the bottom of the right positioning hole; the center of the push plate is provided with a limiting hole that is narrower on the left and wider on the right; a limiting sleeve is provided inside the limiting hole and fitted outside the guide shaft; the outer wall of the limiting sleeve is provided with a limiting cone surface that fits against the inner wall of the limiting hole.
[0012] The limiting sleeve and the slide, the chuck seat and the chuck body, and the chuck body and the fixing seat are all fixed by a number of fixing screws.
[0013] The right end face of the chuck body is provided with several compensation blocks corresponding to the positions of the telescopic holes; the center of each compensation block is provided with an auxiliary hole that communicates with the telescopic holes, the rotating rod passes through the auxiliary hole, and the pressure claw is located on the right side of the compensation block; the compensation block is fixed to the chuck body by several fastening screws; the middle part of the pressure claw is hinged to the right end of the rotating rod by a hinge shaft; the inner end of the pressure claw is provided with an inner pressure block that presses against the right side wall of the workpiece; the outer end of the pressure claw is provided with an outer pressure block that presses against the right side wall of the compensation block.
[0014] A damping hole is provided at the center of the left end face of the limiting block; a disc spring is provided between the bottom of the damping hole and the right side wall of the fixing seat.
[0015] The beneficial effects of this utility model are:
[0016] Compared with existing technologies, the short-stroke rotary chuck with this invention only requires the sliding block to move the push plate to the right, which controls the rotating rod to move the pressure claw to the right while rotating. Furthermore, the rightward movement of the pressure claw is limited by the blocking block at the bottom of the movable groove, ensuring that the pressure claw only moves a short distance. This keeps the distance between the pressure claw and the chuck step extremely small, making it impossible for the operator's hand to reach into the gap between the pressure claw and the chuck seat. This effectively prevents the operator's hand from being pinched or crushed while loading and unloading workpieces, while also enabling normal loading and unloading. In addition, the presence of the positioning ball prevents the operator from holding the workpiece when the pressure claw is limiting it, further preventing the operator's hand from being pinched or crushed. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of the short-stroke rotary chuck of this utility model;
[0018] Figure 2 yes Figure 1 An enlarged view of part A;
[0019] Figure 3 This is a schematic diagram of the structure of the short-stroke rotary chuck of this utility model;
[0020] Figure 4 This is a partial structural schematic diagram of the short-stroke rotary chuck of this utility model;
[0021] Figure 5 This is a schematic diagram of the rotating rod;
[0022] Figure 6 This is a schematic diagram of the structure of the short-stroke rotary chuck of this utility model when no workpiece is placed on it. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0024] Please see Figures 1 to 6This utility model provides a short-stroke rotary chuck, including a chuck body 1. A movable groove 2 is provided at the center of the left end face of the chuck body 1. A fixed seat 3 matching the movable groove 2 is provided at the left end of the chuck body 1. A movable hole 4 communicating with the movable groove 2 is provided at the center of the fixed seat 3. A sliding block 5 matching the movable groove 2 is provided inside the movable hole 4. A push plate 6 located in the movable groove 2 is provided at the right end of the sliding block 5. A locking seat 7 is provided at the center of the right end face of the chuck body 1. Several telescopic holes 8 communicating with the movable groove 2 are provided on the outer edge of the right end face of the chuck body 1. A rotating rod 9 matching the telescopic hole 8 is provided inside the telescopic hole 8. The right end of the rotating rod 9 extends to the right outside the telescopic hole 8 and is provided with a pressing claw 10. A workpiece 11 is clamped between the pressing claw 10 and the locking seat 7. A limiting block 12 corresponding to the position of the movable groove 2 is provided at the left end of the rotating rod 9. A guide groove 13 matching the push plate 6 is provided on one side of the limiting block 12.
[0025] The push plate 6 has a sliding arc surface 14; the guide groove 13 has a guide arc surface 15 that matches the sliding arc surface 14; the middle part of the guide arc surface 15 is a spiral surface 1501.
[0026] The outer peripheral surface of the push plate 6 is provided with a plurality of push parts 16 corresponding to the positions of the rotating rods 9, and the sliding arc surface 14 is provided on the outer edge of the push plate 6; the inner wall of one side of the moving hole 4 is provided with a limiting groove 17; the outer peripheral surface of the slide block 5 is provided with a keyway 18 opposite to the limiting groove 17; the keyway 18 is provided with a matching limiting key 19; the outer end of the limiting key 19 protrudes into the limiting groove 17.
[0027] The chuck body 1 has a guide hole 20 at the center of its right end face that communicates with the movable groove 2; the slide block 5 has a guide shaft 21 at the center of its right end face that matches the guide hole 20.
[0028] The center of the left end face of the positioning seat 7 is provided with a positioning part 22 that matches the right end opening of the guide hole 20; the outer edge of the right end face of the positioning seat 7 is provided with a plurality of positioning steps 23 evenly distributed in a circle; the workpiece 11 is located between the right side wall of the positioning step 23 and the left side wall of the end of the pressure claw 10; a positioning baffle 35 extends to the right from the outer edge of the positioning step 23; the side wall of the positioning baffle 35 opposite to the workpiece 11 is provided with a plurality of evenly distributed bead holes 36; the bead holes 36 are provided with matching positioning beads 37, and the steel balls of the positioning beads 37 press against the outer wall of the workpiece 11.
[0029] The outer wall of the rotating rod 9 is provided with a spiral-shaped oil storage groove 24.
[0030] The left sidewall of the push plate 6 is provided with several right positioning holes 25 evenly distributed in a circle; the right end face of the slide block 5 is provided with several left positioning holes 26 opposite to the right positioning holes 25; a positioning pin 27 is provided between the bottom of the left positioning hole 26 and the bottom of the right positioning hole 25; the center of the push plate 6 is provided with a limiting hole 28 that is narrower on the left and wider on the right; a limiting sleeve 29 that fits outside the guide shaft 21 is provided inside the limiting hole 28; the outer wall of the limiting sleeve 29 is provided with a limiting cone surface 30 that fits against the inner wall of the limiting hole 28.
[0031] The limiting sleeve 29 is fixed to the slide 5, the chuck seat 7 is fixed to the chuck body 1, and the chuck body 1 is fixed to the fixed seat 3 by a number of fixing screws 31.
[0032] The right end face of the chuck body 1 is provided with several compensation blocks 32 corresponding to the positions of the telescopic holes 8; the center of each compensation block 32 is provided with an auxiliary hole 33 that communicates with the telescopic holes 8, the rotating rod 9 passes through the auxiliary hole 33, and the pressure claw 10 is located on the right side of the compensation block 32; the compensation block 32 and the chuck body 1 are fixed together by several fastening screws 34; the middle part of the pressure claw 10 is hinged to the right end of the rotating rod 9 by a hinge shaft 38; the inner end of the pressure claw 10 is provided with an inner pressure block 1001 that presses against the right side wall of the workpiece 11; the outer end of the pressure claw 10 is provided with an outer pressure block 1002 that presses against the right side wall of the compensation block 32.
[0033] A damping hole 39 is provided at the center of the left end face of the limiting block 12; a disc spring is provided between the bottom of the damping hole 39 and the right side wall of the fixing seat 3.
[0034] The method of using this utility model is as follows:
[0035] The slide block 5 can be connected to the piston rod of the hydraulic cylinder. When the finished workpiece needs to be removed from the chuck, the hydraulic cylinder can be activated, causing the piston rod of the hydraulic cylinder to move the slide block 5 to the right. When the slide block 5 moves to the right, the push plate 6 moves to the right simultaneously. Several pushing parts 16 on the outer edge of the push plate 6 are engaged in the guide groove 13. When the pushing part 16 moves to the right, the sliding arc surface 14 on the outer edge of the pushing part 16 will rub against the guide arc surface 15, thereby pushing the limit block 12 to the right under the action of this frictional force, thus realizing the rightward movement of the rotating rod 9. When the rotating rod 9 moves to the right, the pressure claw 10 will move away from the chuck seat 7 to the right. A spiral surface 1501 is provided in the middle of the guide arc surface 15. When the pushing part 16 moves axially, as the sliding arc surface 14 comes into contact with the spiral surface 1501, the sliding arc surface 14 will squeeze the spiral surface 1501, thereby causing the limit block 12 and the rotating rod 12 to move along the spiral surface 1501. As the rotation trajectory rotates, the pressure claw 10 moves to the right and rotates simultaneously. The pressure claw 10, which was originally blocking the right side of the clamping seat 7, moves away from the diameter range of the clamping seat 7, so that there is no obstruction in the space on the right side of the clamping seat 7. The workpiece 11 can then be easily removed from the clamping step 23, completing the quick disassembly of the workpiece 11. When a new workpiece needs to be processed, simply clamp the new workpiece onto the clamping step 23. After the limiting block 12 moves to the right for a certain distance, it will come into contact with the bottom of the movable groove 2. At this time, the bottom of the movable groove 2 can effectively limit the rightward movement of the pressure claw 10, preventing the pressure claw 10 from moving too far to the right. At the same time, it can ensure that the rotating rod 9 can still drive the pressure claw 10 to rotate. In order to ensure that the pressure claw 10 will not injure the operator's hand when loading materials, the distance between the bottom of the movable groove 0 and the right end face of the limiting block 12 can be set to about 3mm. By limiting the rightward movement of the rotating rod 9, a small gap between the pressure claw 10 and the clamping step 23 is achieved.
[0036] The positioning ball 37 is an existing positioning element widely used in machine tool fixtures, automation equipment and other fields. When a new workpiece 11 is placed on the clamping step 23, the positioning ball 37 will use its internal spring to press the steel ball against the outer wall of the workpiece 11, realizing automatic positioning of the workpiece. Therefore, there is no need for the operator to manually support the workpiece 11 to ensure its stability. At the same time, the slide 5 can be pulled to the left by the hydraulic cylinder. When the slide 5 moves to the left, the pushing part 16 on the push plate 6 moves to the left at the same time. As the sliding arc surface 14 of the outer edge of the pushing part 16 contacts the guiding arc surface 15 and the spiral surface 1501, the rotating rod 9 drives the pressure claw 10 to rotate and move to the left at the same time. Finally, the pressure claw 10 is once again in the space on the right side of the clamping seat 7. The inner pressure block 1001 of the pressure claw 10 presses against the right end face of the workpiece 11 again. At this time, the workpiece 11 is restricted between the clamping step 23 and the pressure claw 10, effectively ensuring the stability of the workpiece 11 after loading.
[0037] In summary, this utility model can control the rotating rod 9 to rotate while the pressure claw 10 moves to the right by moving the push plate 6 to the right via the slide block 5. The rightward movement of the pressure claw 10 can be limited by the blocking of the limiting block 12 at the bottom of the movable groove 2, ensuring that the pressure claw 10 only moves a short distance. This keeps the distance between the pressure claw 10 and the locking step 23 within a very small range, making it impossible for the operator's hand to reach into the gap between the pressure claw 10 and the locking seat 7. This effectively prevents the operator's hand from being pinched or pressed while the workpiece 11 is being loaded and unloaded normally. Furthermore, the presence of the positioning ball 37 can prevent the operator from holding the workpiece 11 when the pressure claw 10 is limiting the workpiece 11, thus further preventing the operator's hand from being pinched or pressed.
[0038] The outer circumferential surface of the push plate 6 is provided with several push parts 16 corresponding to the positions of the rotating rods 9. The sliding arc surface 14 is provided on the outer edge of the push plate 6. The inner wall of one side of the moving hole 4 is provided with a limiting groove 17. The outer circumferential surface of the slide block 5 is provided with a keyway 18 opposite to the limiting groove 17. The keyway 18 is provided with a matching limiting key 19. The outer end of the limiting key 19 protrudes into the limiting groove 17. The presence of the limiting key 19 can ensure that the slide block 5 will not rotate when it moves left and right, so that the push plate 6 will not rotate when it moves left and right, ensuring that the push part 16 of the push plate 6 always moves within the guide groove 13, and ensuring the stability of the pressure claw 10 during movement and rotation.
[0039] The center of the right end face of the chuck body 1 is provided with a guide hole 20 that communicates with the movable groove 2. The center of the right end face of the slide 5 is provided with a guide shaft 21 that matches the guide hole 20. The guide shaft 21 can start the guiding function when the slide 5 moves, thereby effectively ensuring the stability of the push plate 6 when it moves to make the rotating rod 9 rotate.
[0040] The center of the left end face of the chuck seat 7 is provided with a positioning part 22 that matches the right end opening of the guide hole 20. The presence of the positioning part 22 can effectively ensure that the chuck seat 7 is coaxial with the chuck body 1, thereby ensuring the accurate placement of the workpiece 11 and realizing the accurate processing of the workpiece 11.
[0041] The outer wall of the rotating rod 9 is provided with a spiral oil reservoir 24, which can store a certain amount of grease. When the rotating rod 9 rotates, the grease will penetrate between the outer wall of the rotating rod 9 and the inner wall of the telescopic hole 8, so as to achieve a lubrication effect and ensure the smooth movement and rotation of the pressure claw 10.
[0042] The left side wall of the push plate 6 is provided with several right positioning holes 25 evenly distributed in a circle. The right end face of the slide block 5 is provided with several left positioning holes 26 opposite to the right positioning holes 25. A positioning pin 27 is provided between the bottom of the left positioning hole 26 and the bottom of the right positioning hole 25. The center of the push plate 6 is provided with a limiting hole 28 that is narrower on the left and wider on the right. A limiting sleeve 29 is provided inside the limiting hole 28 and is fitted outside the guide shaft 21. The outer wall of the limiting sleeve 29 is provided with a limiting cone surface 30 that fits against the inner wall of the limiting hole 28. This fixing method is conducive to the disassembly and assembly of the push plate 6 and the slide block 5. The presence of the positioning pin 27 can play a positioning role when the push plate 6 is installed and fixed on the slide block 5, ensuring that the position of the push part 16 of the push plate 6 can effectively correspond to the position of the guide groove 13.
[0043] The limiting sleeve 29 is fixed to the slide 5, the locking seat 7 is fixed to the chuck body 1, and the chuck body 1 is fixed to the fixed seat 3 by a number of fixing screws 31. This fixing method facilitates the disassembly and assembly of the limiting sleeve 29 and the slide 5, the locking seat 7 and the chuck body 1, and the chuck body 1 and the fixed seat 3.
[0044] The right end face of the chuck body 1 is provided with several compensation blocks 32 corresponding to the positions of the telescopic holes 8. The center of the compensation block 32 is provided with an auxiliary hole 33 that communicates with the telescopic holes 8. The rotating rod 9 passes through the auxiliary hole 33. The pressure claw 10 is located on the right side of the compensation block 32. The middle part of the pressure claw 10 is hinged to the right end of the rotating rod 9 through a hinge shaft 38. The inner end of the pressure claw 10 is provided with an inner pressure block 1001 that presses against the right side wall of the workpiece 11. The outer end of the pressure claw 10 is provided with an outer pressure block 1002 that presses against the right side wall of the compensation block 32. When the hinge shaft 38 is centered, the inner pressure block 1001 and the outer pressure block 1002 located at both ends of the pressure claw 10 are like the two ends of a lever. Therefore, when the inner pressure block 1001 presses against the right side wall of the workpiece 11 and the outer pressure block 1002 presses against the right side wall of the compensation block 32, the pressure surface can be compensated by the lever swing, so that the pressure can be effectively applied to the workpiece 11, effectively compensating for the excessive squeezing caused by the deformation of the pressure claw 10.
[0045] The compensation block 32 is fixed to the chuck body 1 by several fastening screws 34. This fixing method facilitates the disassembly and assembly of the compensation block 32, thereby making it easier to replace the compensation block 32.
[0046] A damping hole 39 is provided at the center of the left end face of the limiting block 12. A disc spring is provided between the bottom of the damping hole 39 and the right side wall of the fixed seat 3. The presence of the disc spring can make the rotating rod 9 respond quickly when it moves to the right by its own elastic force, and can effectively prevent the workpiece 11 from being crushed when the pressure claw 10 presses the workpiece.
Claims
1. A short-stroke rotary chuck comprising a chuck body, characterized by: The left end face of the chuck body is provided with a movable slot; the left end of the chuck body is provided with a fixed seat matched with the movable slot; the fixed seat is provided with a moving hole penetrating the movable slot; the moving hole is provided with a sliding seat matched with the moving hole; the right end of the sliding seat is provided with a push plate located in the movable slot; the right end face of the chuck body is provided with a clamping seat; the outer edge of the right end face of the chuck body is provided with a plurality of telescopic holes penetrating the movable slot; the telescopic holes are provided with rotating rods matched with the telescopic holes; the right end of the rotating rod extends out of the telescopic hole and is provided with a pressing claw; the pressing claw and the clamping seat are clamped with a workpiece; the left end of the rotating rod is provided with a limiting block corresponding to the position of the movable slot; the limiting block is provided with a guide slot matched with the push plate on one side.
2. A short-stroke rotary chuck according to claim 1, characterized in that: The push plate has a sliding arc surface; the guide slot has a guide arc surface matched with the sliding arc surface; the middle part of the guide arc surface is a spiral surface.
3. A short stroke rotary chuck according to claim 2, characterized in that: The outer surface of the push plate is provided with a plurality of push parts corresponding to the positions of the rotating rods, and the sliding arc surface is located on the outer edge of the push plate; the inner wall of one side of the moving hole is provided with a limiting sliding groove; the outer surface of the sliding seat is provided with a key groove opposite to the limiting sliding groove; the key groove is provided with a limiting key matched with the key groove; the outer end of the limiting key protrudes into the limiting sliding groove.
4. A short stroke rotary chuck according to claim 1, characterized in that: The right end face of the chuck body is provided with a guide hole penetrating the movable slot; the right end face of the sliding seat is provided with a guide shaft matched with the guide hole.
5. A short-stroke rotary chuck according to claim 4, characterized in that: The left end face of the clamping seat is provided with a positioning part matched with the right end hole of the guide hole; The outer edge of the right end face of the clamping seat is provided with a plurality of clamping steps uniformly distributed in a circle; the workpiece is located between the right side wall of the clamping step and the left side wall of the end part of the pressing claw; the outer edge of the clamping step extends to the right to form a positioning baffle; the side wall opposite to the workpiece of the positioning baffle is provided with a plurality of evenly distributed wave bead holes; the wave bead holes are provided with positioning wave beads matched with the wave bead holes, and the steel balls of the positioning wave beads press against the outer wall of the workpiece.
6. A short stroke rotary chuck as claimed in claim 1, wherein: The outer wall of the rotating rod is provided with a spiral oil storage groove.
7. A short stroke rotary chuck as claimed in claim 4, wherein: The left side wall of the push plate is provided with a plurality of right positioning holes uniformly distributed in a circle; the right end face of the sliding seat is provided with a plurality of left positioning holes opposite to the right positioning holes; a positioning pin is arranged between the bottom of the left positioning hole and the bottom of the right positioning hole; the center of the push plate is provided with a limiting hole with a narrow left side and a wide right side; the limiting hole is provided with a limiting sleeve outside the guide shaft; The outer wall of the limiting sleeve is provided with a limiting conical surface matched with the inner wall of the limiting hole.
8. A short stroke rotary chuck according to claim 7, characterized in that: The limiting sleeve and the sliding seat, the clamping seat and the chuck body, and the chuck body and the fixed seat are fixed by a plurality of fixing screws.
9. A short stroke rotary chuck as claimed in claim 1, wherein: The right end face of the chuck body is provided with a plurality of compensation blocks corresponding to the positions of the telescopic holes; the center of the compensation block is provided with an auxiliary hole penetrating the telescopic hole, the rotating rod passes through the auxiliary hole, and the pressing claw is located on the right side of the compensation block; the compensation block and the chuck body are fixed by a plurality of fastening screws; the middle part of the pressing claw is hinged to the right end of the rotating rod by a hinge shaft; the inner end of the pressing claw is provided with an inner pressing block pressing against the right side wall of the workpiece; the outer end of the pressing claw is provided with an outer pressing block pressing against the right side wall of the compensation block.
10. A short stroke rotary chuck as claimed in claim 1, wherein: The left end surface of the limiting block is provided with a damping hole; a disc spring is arranged between the bottom of the damping hole and the right side wall of the fixed seat.