A micro-precision shaft clamping device

Abstract

The application discloses a micro precise shaft clamping device, which comprises a clamping jaw fixing seat, the inner side of which is rotationally connected with a shaft sleeve; a clamping seat, which is fixedly installed with a cylinder; the clamping seat is rotationally connected with a rotating shaft, and the shaft sleeve is fixedly connected with the rotating shaft; a telescopic shaft, which is rotationally connected with the piston rod of the cylinder and is slidingly connected with the rotating shaft; a clamping jaw fixing sleeve, which is fixedly connected with one end of the rotating shaft away from the clamping seat; and a clamping jaw, which is slidingly connected with one end of the telescopic shaft away from the cylinder and is slidingly connected with the clamping jaw fixing sleeve. The micro precise shaft clamping device provided by the application adopts the cylinder to drive the telescopic shaft and the clamping jaw to realize synchronous action, realizes quick clamping and loosening of workpieces, and can uniformly apply clamping force in an envelope type clamping mode; meanwhile, the micro precise shaft clamping device is convenient to disassemble, saves labor and improves machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of clamping technology, and in particular to a miniature precision shaft clamping device. Background Technology

[0002] In the machining of miniature precision shaft components (such as engine shafts, scanner shafts, and precision shafts in automotive parts), clamping devices are required for precise workpiece positioning, and easy disassembly and replacement are also necessary. Current technologies primarily use manual three-jaw chucks or vises for clamping and positioning. Due to transmission structure factors and manufacturing precision errors, these methods suffer from drawbacks such as low repeatability and difficulty in multi-angle workpiece position adjustment. They are only suitable for rough machining and cannot meet design precision requirements during production debugging. Furthermore, existing clamping methods easily cause indentation or scratches on the surface of miniature precision shaft workpieces, and their complex structure makes workpiece disassembly and replacement inconvenient, affecting machining efficiency and finished product quality.

[0003] Therefore, it is necessary to provide a new miniature precision shaft clamping device to solve the above-mentioned technical problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a miniature precision shaft clamping device.

[0005] The present invention provides a miniature precision shaft clamping device, comprising: The gripper fixing seat has a bushing rotatably connected to its inner side; A clamping seat on which a cylinder is fixedly mounted, a rotating shaft is rotatably connected to the clamping seat, and a bushing is fixedly connected to the rotating shaft; A telescopic shaft is rotatably connected to the piston rod of the cylinder, and the telescopic shaft is slidably connected to the rotating shaft; The gripper retaining sleeve is fixedly connected to the end of the rotating shaft away from the gripper seat; The gripper is slidably connected to the end of the telescopic shaft away from the cylinder, and the gripper is slidably connected to the gripper fixing sleeve.

[0006] Preferably, it also includes a spring, and a spring is provided between the telescopic shaft and the rotating shaft.

[0007] Preferably, the bushing also includes bearings and locking nuts. Two bearings are symmetrically arranged on the outer side of the bushing. One bearing is fixed by the bushing and the clamping seat, and the other bearing is fixed by the locking nut and the clamping seat. The bushing is rotatably connected to the clamping seat through the bearings.

[0008] Preferably, a drive unit is fixedly connected to the outer side of the rotating shaft.

[0009] Preferably, it also includes a limiting sleeve, which is fixedly connected to the gripper fixing sleeve.

[0010] Preferably, the gripper fixing sleeve is conical, and a first sliding groove is provided on the gripper fixing sleeve, through which the gripper is slidably connected to the gripper fixing sleeve.

[0011] Preferably, the gripper is provided with a slider, and the telescopic shaft is provided with a second sliding groove, and the gripper is slidably connected to the telescopic shaft through the slider and the second sliding groove.

[0012] Compared with related technologies, the miniature precision shaft clamping device provided by the present invention has the following advantages: This invention provides a miniature precision shaft clamping device that uses a cylinder-driven telescopic shaft to drive the synchronous movement of the grippers, enabling rapid clamping and release of workpieces. The enveloping clamping method can apply clamping force evenly, while also facilitating disassembly, saving labor and improving processing efficiency. An external power source can be connected to the drive unit fixed to the outside of the rotating shaft to achieve synchronous rotation of the entire clamping device, driving the workpiece to rotate stably under clamping conditions, meeting multi-angle processing requirements. The gripper fixing sleeve is conical and cooperates with a first sliding groove and a limiting sleeve. The slider on the gripper and the second sliding groove on the telescopic shaft work together to achieve smooth sliding and opening changes of the gripper within the conical inner wall. The device features a compact structure, reliable operation, and good versatility. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of the miniature precision shaft clamping device provided by the present invention; Figure 2 An exploded view of the miniature precision shaft clamping device provided by the present invention; Figure 3 A schematic diagram of the telescopic shaft, gripper, and gripper fixing sleeve provided by the present invention; Figure 4 This is a schematic diagram of the gripper and gripper fixing sleeve structure provided by the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the miniature precision shaft clamping device provided by the present invention.

[0014] The following are the labels in the diagram: 1. Gripper fixing seat; 2. Gripper; 3. Cylinder; 4. Bushing; 5. Rotating shaft; 6. Telescopic shaft; 7. Gripper; 8. Gripper fixing sleeve; 9. Spring; 10. Bearing; 11. Locking nut; 12. Drive unit; 13. Limiting sleeve; 14. First slide groove; 15. Slider; 16. Second slide groove. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] In the specific implementation process, such as Figures 1-4As shown, a miniature precision shaft clamping device includes a jaw fixing seat 1, a clamping seat 2, a cylinder 3, a bushing 4, a rotating shaft 5, a telescopic shaft 6, a jaw 7, a jaw fixing sleeve 8, a spring 9, a bearing 10, a locking nut 11, a drive unit 12, and a limiting sleeve 13.

[0017] The inner side of the gripper fixing seat 1 is rotatably connected to the bushing 4 via the bearing 10. Two symmetrically arranged bearings 10 are provided on the outer side of the bushing 4. One bearing 10 is fixed to the gripper fixing seat 1 via the bushing 4, and the other bearing 10 is fixed to the gripper fixing seat 1 via the locking nut 11. The bushing 4 achieves relative rotation with the gripper fixing seat 1 by relying on the bearings 10.

[0018] A cylinder 3 is fixedly installed on the clamping seat 2, and a rotating shaft 5 is rotatably connected to the clamping seat 2. The bushing 4 is fixedly connected to the rotating shaft 5, so that the rotating shaft 5 drives the bushing 4 to rotate synchronously when it rotates.

[0019] The telescopic shaft 6 is rotatably connected to the piston rod of the cylinder 3, and the telescopic shaft 6 is also slidably connected to the rotating shaft 5. A spring 9 is provided between the telescopic shaft 6 and the rotating shaft 5. The spring 9 is used to provide temporary clamping when the cylinder 3 fails.

[0020] The end of the rotating shaft 5 away from the clamping seat 2 is fixedly connected to the jaw fixing sleeve 8. The jaw fixing sleeve 8 is conical in shape and has a first sliding groove 14. The limiting sleeve 13 is fixedly connected to the jaw fixing sleeve 8 to limit the sliding range of the jaw 7.

[0021] The end of the telescopic shaft 6 away from the cylinder 3 is slidably connected to the gripper 7. The gripper 7 is provided with a slider 15. The telescopic shaft 6 has a second slide groove 16. The gripper 7 achieves a sliding connection with the telescopic shaft 6 through the cooperation of the slider 15 and the second slide groove 16. The gripper 7 is also slidably connected to the gripper fixing sleeve 8 through the first slide groove 14.

[0022] The drive unit 12 is fixedly connected to the outer side of the rotating shaft 5. The drive unit 12 is a sprocket, but it can also be replaced with a synchronous pulley, gear or belt pulley or other transmission components as needed.

[0023] During operation, the entire gripper fixing seat 1 is fixedly installed on the equipment frame. The piston rod of the cylinder 3 extends, driving the telescopic shaft 6 to slide backward. The telescopic shaft 6 drives the gripper 7 to move along the second slide groove 16 towards the gripper seat 2. At the same time, the gripper 7 slides along the first slide groove 14 and the conical inner wall of the gripper fixing sleeve 8, increasing the opening at the front end of the gripper 7. At this time, a miniature precision shaft workpiece is placed inside the gripper 7. The piston rod of the cylinder 3 retracts, and the telescopic shaft 6 slides forward under the action of the cylinder 3, pushing the gripper 7 to move away from the gripper seat 2 along the second slide groove 16. At the same time, the gripper 7 contracts radially along the first slide groove 14 under the pressure of the conical inner wall of the gripper fixing sleeve 8, decreasing the opening at the front end of the gripper 7 and clamping the workpiece from the outside. External power drives the rotating shaft 5 to rotate through the drive unit 12. The rotating shaft 5 drives the bushing 4 and the entire gripper part to rotate synchronously, and the workpiece rotates accordingly without loosening. When it is necessary to remove the workpiece, the cylinder 3 drives the telescopic shaft 6 to move backward, and the gripper 7 automatically releases, allowing the workpiece to be removed.

[0024] All standard parts used in this invention can be purchased from the market. Each component in this invention can be customized according to the description and drawings. The specific connection methods of each component adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming, which is common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, this application document will not explain the control method and circuit connection in detail, and will not be described in detail here.

[0025] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A miniature precision shaft clamping device, characterized in that, include: The gripper fixing seat (1) has a bushing (4) rotatably connected to its inner side; A clamping seat (2) is fixedly mounted with a cylinder (3), and a rotating shaft (5) is rotatably connected to the clamping seat (2). The bushing (4) is fixedly connected to the rotating shaft (5). The telescopic shaft (6) is rotatably connected to the piston rod of the cylinder (3), and the telescopic shaft (6) is slidably connected to the rotating shaft (5); The gripper fixing sleeve (8) is fixedly connected to the end of the rotating shaft (5) away from the gripper seat (2); The gripper (7) is slidably connected to the end of the telescopic shaft (6) away from the cylinder (3), and the gripper (7) is slidably connected to the gripper fixing sleeve (8).

2. The miniature precision shaft clamping device according to claim 1, characterized in that, It also includes a spring (9), which is provided between the telescopic shaft (6) and the rotating shaft (5).

3. The miniature precision shaft clamping device according to claim 1, characterized in that, It also includes a bearing (10) and a locking nut (11). The bushing (4) has two symmetrically arranged bearings (10) on its outer side. One of the bearings (10) is fixed by the bushing (4) and the clamping seat (1), and the other bearing (10) is fixed by the locking nut (11) and the clamping seat (1). The bushing (4) is rotatably connected to the clamping seat (1) through the bearing (10).

4. The miniature precision shaft clamping device according to claim 1, characterized in that, The drive unit (12) is fixedly connected to the outer side of the rotating shaft (5).

5. The miniature precision shaft clamping device according to claim 1, characterized in that, It also includes a limiting sleeve (13), which is fixedly connected to the gripper fixing sleeve (8).

6. The miniature precision shaft clamping device according to claim 1, characterized in that, The gripper fixing sleeve (8) is conical, and a first sliding groove (14) is provided on the gripper fixing sleeve (8). The gripper (7) is slidably connected to the gripper fixing sleeve (8) through the first sliding groove (14).

7. The miniature precision shaft clamping device according to claim 1, characterized in that, The gripper (7) is provided with a slider (15), and the telescopic shaft (6) is provided with a second groove (16). The gripper (7) is slidably connected to the telescopic shaft (6) through the slider (15) and the second groove (16).

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