Special-shaped workpiece clamp
By introducing structures such as limit movable blocks, positioning frames and strip guide boxes into the fixture, the problem of poor clamping stability of cylindrical workpieces in the prior art is solved, and stable fixation and rotational positioning of irregularly shaped workpieces are achieved. Improves the accuracy and practicality of processing.
Patent Information
- Application Number
- CN202420797452.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-31
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When existing fixtures clamp irregularly shaped cylindrical workpieces, they have poor stability, which can easily lead to workpiece deviation, and the contact area between the conventional clamping parts and the workpiece surface is small, so they cannot be effectively fixed.
A special-shaped workpiece fixture is designed, adopting a limit movable block and a positioning frame structure, supporting and limiting from the inner wall of the workpiece through a support strip, and limiting and guiding the bottom of the workpiece with a bar guide box and limiting support wheel. , combined with the lifting mechanism and the adjustment motor, the stable clamping and rotary positioning of the cylindrical workpiece is achieved.
It improves the clamping stability and practicality of the workpiece, ensures the accuracy of the position of the workpiece during the rotary processing, and is suitable for cylindrical workpieces of different shapes and sizes.
Smart Images
Figure CN222269380U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tooling fixtures, and more specifically to a special-shaped workpiece fixture. Background Art
[0002] The fixture is an important tool in the machining process, which is used to fix the workpiece during the machining process. The fixture is used to clamp the workpiece so that the workpiece can be operated. Existing fixtures are usually used to clamp workpieces with regular shapes. However, for some cylindrical workpieces, due to their irregular structure, if conventional fixtures are used, the fitting effect is poor and they cannot be stably fixed.
[0003] For example, the patent publication number CN213532276U is a processing fixture based on cam-shaped workpieces, which belongs to the field of tooling fixture technology. It includes a support frame, the left side of the inner wall of the support frame is fixedly connected to the left side of the driving mechanism, the right side of the driving mechanism is fixedly connected to the left end of the rotating shaft, and the upper surface of the driving mechanism overlaps the lower surface of the fixed plate. The processing fixture based on the cam-shaped workpiece is provided with a second motor, a gear, a gear ring, a rope, a first spring, a rubber pad, a first motor, a cam and a positioning block, so that the device can provide multiple fixed points for the workpiece, and can be suitable for clamping workpieces of different shapes.
[0004] When the above-mentioned clamps are actually used, only the clamping device is used to fix the bottom of the workpiece. The contact area between the clamping part and the workpiece surface is small, and the stability is poor. In addition, the spring is used to tighten the rubber pad and limit it. Since the spring is easy to deform, the stability of the workpiece clamping is insufficient, and the workpiece is easily offset during the rotation processing driven by the clamping device. Therefore, it is necessary to improve the problems existing in the above-mentioned clamps. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a special-shaped workpiece fixture, which has the advantages of convenient processing and high stability, so as to solve the problems existing in the above-mentioned background technology.
[0006] The utility model provides the following technical solutions: a special-shaped workpiece clamp, comprising a base, a fixed block is fixedly connected to the upper surface of the base, an adjustment slot is provided on the side of the fixed block, a lifting mechanism is arranged inside the adjustment slot, the lifting mechanism comprises a limit movable block, a strip-shaped mounting hole is provided on the surface of the fixed block, a lifting screw rod is rotatably connected to the inner wall of the strip mounting hole, a lifting block is threadedly connected to the surface of the lifting screw rod, and the lifting block is fixedly connected to the surface of the limit movable block;
[0007] The side of the limit movable block is rotatably connected with a positioning frame, the positioning frame is in a U-shaped structure, and the inner side of the positioning frame is rotatably connected with a first bidirectional screw rod, the end of the positioning frame is fixed with a driving motor, the surface of the first bidirectional screw rod is threadedly connected with two moving blocks, the surfaces of the two moving blocks are rotatably connected with two support rods, and the ends of the support rods at two corresponding positions away from the limit movable block are rotatably connected with support strips, and the support strips are used to support and limit the inner wall of the tubular workpiece;
[0008] A strip-shaped guide box is fixedly connected to the upper surface of the base, and a limit support assembly is arranged on the surface of the strip guide box. The limit support assembly is used to limit and guide the bottom of the workpiece.
[0009] Furthermore, the position limiting support assembly includes a second bidirectional screw rod rotatably connected to the inner wall of the strip guide box, the surface of the second bidirectional screw rod is threadedly connected to two adjustment columns, and the top end of the adjustment column is fixedly connected to a mounting block.
[0010] Furthermore, the surface of the mounting block is rotatably connected to a limited support wheel, a rectangular guide hole is opened on the upper surface of the strip guide box, the adjustment column is slidably connected to the inner wall of the rectangular guide hole, and one end of the second bidirectional screw rod extends to the outside of the strip guide box and is fixedly connected to an adjustment knob.
[0011] Furthermore, the limiting movable block is an internal hollow structure, and an adjusting motor is fixedly connected to the upper surface of the limiting movable block. The output shaft of the adjusting motor extends to the interior of the limiting movable block and is fixedly connected to a driving gear.
[0012] Furthermore, the inner wall of the limiting movable block is rotatably connected with a connecting column, one end of the connecting column extends to the outside of the limiting movable block and is fixedly connected to the side of the positioning frame, and the other end of the connecting column is fixedly connected to a driven gear, and the driving gear is meshed with the driven gear.
[0013] Furthermore, the lifting block is slidably connected to the inner wall of the strip mounting hole, the limiting movable block is slidably connected to the inner wall of the adjusting groove, the inner wall of the adjusting groove is provided with two limiting sliding grooves symmetrically positioned to each other, the surface of the limiting movable block is fixedly connected to a guide slider, and the guide slider is slidably connected to the inner wall of the limiting sliding groove.
[0014] Furthermore, the two support bars are symmetrically distributed on the front and rear sides of the positioning frame, and rubber pads are fixedly provided on the sides of the two support bars away from each other, and the top end of the lifting screw rod is fixedly connected with an adjusting wheel.
[0015] Technical effects and advantages of the utility model:
[0016] 1. The utility model provides a limiting movable block and a positioning frame. When clamping and fixing the cylindrical workpiece, the two support bars on the surface of the positioning frame can be used to support and press from the inner wall of the workpiece outward, thereby limiting and fixing the workpiece from the inside, thereby facilitating the staff to process and handle the surface of the cylindrical workpiece, and conveniently rotating and positioning the workpiece while clamping it, facilitating processing at different positions of the workpiece, and improving the practicality of the clamp.
[0017] 2. The utility model provides a strip guide box and a limit support wheel, and can use the limit support wheel to limit and support the bottom of the workpiece. The limit support wheel can also be used to guide the far end of the workpiece while the positioning frame drives the rotation, which further helps to improve the stability of the workpiece during processing. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a three-dimensional front view structural diagram of the utility model;
[0019] Figure 2 This is a schematic diagram of the three-dimensional rear view structure of the utility model;
[0020] Figure 3 This is a schematic diagram of the three-dimensional side view structure of the utility model;
[0021] Figure 4 This is a schematic diagram of the top-sectional structure of the positioning frame of the utility model;
[0022] Figure 5 This is a schematic diagram of the front section structure of the limit movable block of the utility model;
[0023] Figure 6 It is a schematic diagram of the front section structure of the strip guide box of the utility model.
[0024] The accompanying drawings are marked as follows: 1. base; 2. fixed block; 3. adjustment slot; 4. limit movable block; 5. lifting screw; 6. lifting block; 7. positioning frame; 8. first bidirectional screw; 9. moving block; 10. support rod; 11. support bar; 12. bar guide box; 13. second bidirectional screw; 14. adjustment column; 15. rectangular guide hole; 16. adjustment knob; 17. adjustment motor; 18. driving gear; 19. connecting column; 20. driven gear; 21. limit slide groove; 22. rubber pad; 23. adjustment wheel; 24. limit support wheel; 25. driving motor. DETAILED DESCRIPTION
[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the special-shaped workpiece fixture involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0026] Reference Figure 1-6 The utility model provides a special-shaped workpiece clamp, including a base 1, a fixed block 2 is fixedly connected to the upper surface of the base 1, an adjusting groove 3 is opened on the side of the fixed block 2, a lifting mechanism is arranged inside the adjusting groove 3, and the lifting mechanism includes a limiting movable block 4, a strip mounting hole is opened on the surface of the fixed block 2, a lifting screw rod 5 is rotatably connected to the inner wall of the strip mounting hole, a lifting block 6 is threadedly connected to the surface of the lifting screw rod 5, and the lifting block 6 is fixedly connected to the surface of the limiting movable block 4; an adjusting wheel 23 is fixedly connected to the top of the lifting screw rod 5, and the staff can drive the lifting screw rod 5 to rotate by rotating the adjusting wheel 23, thereby driving the lifting block 6 to move up and down inside the strip mounting hole.
[0027] The side of the limiting movable block 4 is rotatably connected to the positioning frame 7. The limiting movable block 4 is an internal hollow structure, and the upper surface of the limiting movable block 4 is fixedly connected to an adjusting motor 17. The output shaft of the adjusting motor 17 extends to the interior of the limiting movable block 4 and is fixedly connected to a driving gear 18. The inner wall of the limiting movable block 4 is rotatably connected to a connecting column 19. One end of the connecting column 19 extends to the outside of the limiting movable block 4 and is fixedly connected to the side of the positioning frame 7. The other end of the connecting column 19 is fixedly connected to a driven gear 20, and the driving gear 18 is meshed with the driven gear 20.
[0028] The lifting block 6 is slidably connected to the inner wall of the strip mounting hole, the limiting movable block 4 is slidably connected to the inner wall of the adjusting groove 3, the inner wall of the adjusting groove 3 is provided with two symmetrical limiting slide grooves 21, the surface of the limiting movable block 4 is fixedly connected with a guide slider, the guide slider is slidably connected to the inner wall of the limiting slide groove 21, and by setting the guide slider and the limiting slide groove 21, the limiting movable block 4 can be guided and limited.
[0029] When in use, the height of the positioning frame 7 is adjusted by adjusting the height of the limiting movable block 4, so as to facilitate clamping and limiting of cylindrical workpieces of different sizes.
[0030] The positioning frame 7 has a U-shaped structure, and the inner side of the positioning frame 7 is rotatably connected to a first bidirectional screw rod 8, a driving motor 25 is fixed to the end of the positioning frame 7, and two moving blocks 9 are threadedly connected to the surface of the first bidirectional screw rod 8. The upper surface of the moving block 9 is slidably connected to the inner surface of the positioning frame 7, and the moving block 9 has a rectangular structure. The positioning frame 7 is slidably connected to the moving block 8, which can limit the moving block 9 and prevent the moving block 9 from rotating together with the first bidirectional screw rod 8.
[0031] The surfaces of the two movable blocks 9 are rotatably connected to two support rods 10, and the ends of the support rods 10 at the two corresponding positions away from the limiting movable block 4 are rotatably connected to support bars 11, and the support bars 11 are used to support and limit the inner wall of the tubular workpiece. The two support bars 11 are symmetrically distributed on the front and rear sides of the positioning frame 7, and rubber pads 22 are fixedly provided on the sides of the two support bars 11 away from each other.
[0032] It is worth mentioning that by setting the limiting movable block 4 and the positioning frame 7, when clamping and fixing the cylindrical workpiece, first set the workpiece sleeve on the surface of the positioning frame 7, and then start the driving motor 25. The driving motor 25 drives the first bidirectional screw 8 to rotate, and then drives the two moving blocks 9 to move at the same time. The moving block 9 drives the two support bars 11 to rotate by pushing the support rod 10, and then uses the two support bars 11 to support and tighten from the inner wall of the workpiece to the outside, so as to limit and fix the workpiece from the inside, which is convenient for the staff to process and handle the surface of the cylindrical workpiece. At the same time, the adjusting motor 17 can drive the positioning frame 7 to rotate on the side of the limiting movable block 4, and drive the workpiece to rotate to different angles, so as to rotate and position the workpiece while clamping it, and process different positions of the workpiece, thereby improving the practicality of the clamp.
[0033] A strip guide box 12 is fixedly connected to the upper surface of the base 1, and a limit support assembly is arranged on the surface of the strip guide box 12. The limit support assembly is used to limit and guide the bottom of the workpiece. The limit support assembly includes a second bidirectional screw rod 13 rotatably connected to the inner wall of the strip guide box 12, and two adjusting columns 14 are threadedly connected to the surface of the second bidirectional screw rod 13, and the top of the adjusting column 14 is fixedly connected to a mounting block.
[0034] The surface of the mounting block is rotatably connected to the limit support wheel 24, a rectangular guide hole 15 is opened on the upper surface of the strip guide box 12, the adjusting column 14 is slidably connected to the inner wall of the rectangular guide hole 15, one end of the second bidirectional screw rod 13 extends to the outside of the strip guide box 12, and is fixedly connected with an adjusting knob 16. By rotating the adjusting knob 16, the second bidirectional screw rod 13 can be driven to rotate, and then the distance between the two limit support wheels 24 can be adjusted, which is suitable for limiting cylindrical workpieces of different sizes.
[0035] It is worth mentioning that by arranging a strip guide box 12 and a limiting support wheel 24 on the surface of the base 1, after the workpiece is clamped, the workpiece is lowered to the surface of the limiting support wheel 24 through the lifting block 6, and then the bottom of the workpiece is limited and supported by the limiting support wheel 24, so that while the positioning frame 7 drives the rotation, the limiting support wheel 24 can be used to guide and support one end of the workpiece principle fixing block 2, thereby avoiding the upper and lower position deviation of the workpiece during the rotation process.
[0036] Finally, it should be noted that the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model. The above description is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A special-shaped workpiece fixture, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected with a fixed block (2), the side of the fixed block (2) is provided with an adjustment groove (3), the interior of the adjustment groove (3) is provided with a lifting mechanism, the lifting mechanism comprises a limit movable block (4), the surface of the fixed block (2) is provided with a strip-shaped mounting hole, the inner wall of the strip-shaped mounting hole is rotatably connected with a lifting screw rod (5), the surface of the lifting screw rod (5) is threadedly connected with a lifting block (6), and the lifting block (6) is fixedly connected to the surface of the limit movable block (4); The side of the limit movable block (4) is rotatably connected to a positioning frame (7), the positioning frame (7) is in a U-shaped structure, and the inner side of the positioning frame (7) is rotatably connected to a first bidirectional screw rod (8), the end of the positioning frame (7) is fixed with a driving motor (25), the surface of the first bidirectional screw rod (8) is threadedly connected to two moving blocks (9), the surfaces of the two moving blocks (9) are both rotatably connected to two support rods (10), and the ends of the two corresponding support rods (10) away from the limit movable block (4) are rotatably connected to support bars (11), and the support bars (11) are used to support and limit the inner wall of the tubular workpiece; A strip-shaped guide box (12) is fixedly connected to the upper surface of the base (1), and a limit support component is provided on the surface of the strip-shaped guide box (12), wherein the limit support component is used to limit and guide the bottom of the workpiece.
2. A special-shaped workpiece fixture according to claim 1, characterized in that: The position limiting support assembly comprises a second bidirectional screw rod (13) rotatably connected to the inner wall of the strip guide box (12); two adjustment columns (14) are threadedly connected to the surface of the second bidirectional screw rod (13); and a mounting block is fixedly connected to the top end of the adjustment column (14).
3. A special-shaped workpiece fixture according to claim 2, characterized in that: The surface of the mounting block is rotatably connected to a limit support wheel (24); a rectangular guide hole (15) is provided on the upper surface of the strip guide box (12); the adjustment column (14) is slidably connected to the inner wall of the rectangular guide hole (15); one end of the second bidirectional screw rod (13) extends to the outside of the strip guide box (12) and is fixedly connected to an adjustment knob (16).
4. The special-shaped workpiece fixture according to claim 1, characterized in that: The position-limiting movable block (4) is an internal hollow structure, and an adjusting motor (17) is fixedly connected to the upper surface of the position-limiting movable block (4); an output shaft of the adjusting motor (17) extends into the interior of the position-limiting movable block (4) and is fixedly connected to a driving gear (18).
5. A special-shaped workpiece fixture according to claim 4, characterized in that: The inner wall of the limit movable block (4) is rotatably connected to a connecting column (19), one end of the connecting column (19) extends to the outside of the limit movable block (4) and is fixedly connected to the side of the positioning frame (7), and the other end of the connecting column (19) is fixedly connected to a driven gear (20), and the driving gear (18) is meshed with the driven gear (20).
6. The special-shaped workpiece fixture according to claim 1, characterized in that: The lifting block (6) is slidably connected to the inner wall of the strip-shaped mounting hole, the limit movable block (4) is slidably connected to the inner wall of the adjustment groove (3), the inner wall of the adjustment groove (3) is provided with two limit sliding grooves (21) symmetrically positioned to each other, the surface of the limit movable block (4) is fixedly connected to a guide slider, and the guide slider is slidably connected to the inner wall of the limit sliding groove (21).
7. The special-shaped workpiece fixture according to claim 1, characterized in that: The two support bars (11) are symmetrically distributed on the front and rear sides of the positioning frame (7), and rubber pads (22) are fixedly provided on the sides of the two support bars (11) that are away from each other, and the top end of the lifting screw rod (5) is fixedly connected to an adjusting wheel (23).