Self-centering clamp for dynamic balance of transmission shaft assembly
By designing a self-centering fixture in a high-speed dynamic balance fixture, the linkage structure between the guide block and the jaw eliminates the gap, solving the problems of low detection accuracy and inconvenient disassembly in the prior art, achieving higher coordination accuracy and simpler operation.
Patent Information
- Application Number
- CN202420376741.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The prior art adopts a gap fit design in high-speed dynamic balance fixtures, which affects the detection accuracy and the disassembly and assembly operation are not simple enough, affecting the balance result.
A self-centering fixture is designed, including tool base, jaws and guide blocks. The linkage structure between guide blocks and jaws is achieved to achieve self-centering, eliminating the gap between tool cabinets and parts and improving the matching accuracy.
This enables simpler disassembly and assembly operations of parts, reduces the impact on balance results, and improves coordination accuracy.
Smart Images
Figure CN222553280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a clamp structure, in particular to a self-centering clamp used for dynamic balancing of a transmission shaft assembly. Background Art
[0002] A fixture is a device used to fix the object to be processed in the mechanical manufacturing process so that it occupies the correct position for construction or testing. The quality of fixture design has a direct impact on production efficiency, processing cost, product quality, and production safety. Therefore, when designing a fixture, its practicality, economy, and reliability must be considered.
[0003] The existing technical solution uses a tooling fixture with a fixed inner diameter. In order to ensure easy disassembly and assembly, a clearance fit design is adopted. The positioning element is fixed to the outer diameter of the part, and the clamping element is tightened and fixed to the tooling with a nut. However, this tooling adopts a clearance fit. Due to the high-speed dynamic balancing fixture, the tooling size accuracy requirements are high. The tooling adopts a clearance fit, which will affect its detection accuracy. Summary of the invention
[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide a self-centering fixture for dynamic balancing of a transmission shaft assembly which is simple to operate and has little influence on the balancing result.
[0005] The utility model solves the technical problem by adopting a technical solution: the self-centering fixture for dynamic balancing of a transmission shaft assembly comprises a tooling base, a clamping claw and a guide block, the guide block is inserted into the center position of the tooling base, the clamping claw is assembled on the tooling base and connected to the guide block, the ball cage is fixed on the tooling base through the clamping claw, and the end cover at the bottom of the ball cage contacts the guide block.
[0006] A spring is arranged between the bottom of the guide block and the tooling base.
[0007] A screw rod is fixed on the tooling base, the ball cage passes through the screw rod, and a nut is assembled on the top of the screw rod.
[0008] Three clamping jaws are evenly distributed on the tooling base, the tooling base and the clamping jaws are connected via a T-shaped slot, and the clamping jaws slide along the T-shaped slot.
[0009] The clamping jaw is connected to the outer inclined surface of the guide block, and the clamping jaw and the guide block are connected through a T-shaped groove, and the clamping jaw slides along the inclined surface of the guide block.
[0010] The beneficial effects of the utility model are as follows: the utility model structure realizes self-centering through the linkage structure of the guide block and the clamping claw, eliminates the gap between the tooling and the parts, improves the matching accuracy, and the disassembly and assembly operation of the parts is simpler and has less influence on the balance result. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0012] Figure 2 It is a side view structural schematic diagram of the utility model;
[0013] Figure 3 It is a schematic diagram of the structure of the utility model from top view;
[0014] Figure 4 It is a CC cross-sectional structural schematic diagram of the utility model.
[0015] Description of the reference numerals: tooling base 1, spring 2, guide block 3, clamping claw 4, screw rod 5, ball cage 6, nut 7, end cover 8. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings:
[0017] like Figure 1-4 As shown, the self-centering fixture for dynamic balancing of a transmission shaft assembly comprises a tooling base 1, a clamping jaw 4 and a guide block 3. The tooling base 1 is mounted on the initial mounting surface of the dynamic balancing for fixing. The guide block 3 is inserted into the center of the tooling base 1. A spring 2 is provided between the bottom of the guide block 3 and the tooling base 1. The spring 2 plays a supporting role, so that the guide block 3 can maintain a fixed position without external force, which is convenient for the disassembly and assembly of the ball cage 6. The clamping jaw 4 is assembled on the tooling base 1 and connected to the guide block 3. The ball cage 6 is fixed on the tooling base 1 through the clamping jaw 4. The end cover 8 at the bottom of the ball cage 6 contacts the guide block 3.
[0018] Three clamping jaws 4 are evenly distributed on the tooling base 1. The tooling base 1 and the clamping jaws 4 are connected by a T-slot, and the clamping jaws 4 slide along the T-slot. The clamping jaws 4 are connected to the outer inclined surface of the guide block 3. The clamping jaws 4 and the guide block 3 are connected by a T-slot, and the clamping jaws 4 slide along the inclined surface of the guide block 3. The downward movement of the guide block 3 drives the clamping jaws 4 to move toward the center of the circle, forming a linkage to achieve self-centering.
[0019] Two symmetrical screw rods 5 are fixed on the tooling base 1, and the ball cage 6 passes through the screw rods 5. The top of the screw rod 5 is equipped with a nut 7, so that the clamping jaws 4 further press the outer diameter of the ball cage 6.
[0020] During assembly, the ball cage 6 passes through the screw rod 5 downward, and the end cover 8 at the bottom of the ball cage 6 first contacts the guide block 3, compressing the spring 2. Through the linkage of the guide block 3 and the clamping jaw 4, when the ball cage 6 is pressed in, the clamping jaw 4 simultaneously shrinks toward the center of the circle to achieve self-centering. Then, the nut 7 is tightened on the screw rod 5 to further press the clamping jaw 4 against the outer diameter of the ball cage 6 to achieve a zero clearance fit. When disassembling the ball cage 6, just unscrew the nut 7, and the ball cage 6 can be easily disassembled, and the entire fixture structure can automatically restore to its original state, providing the next part for re-clamping. The utility model structure fills the gap between the fixture and the parts, and the disassembly and assembly of the parts is simpler and has less impact on the balancing result.
[0021] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.
Claims
1. A self-centering fixture for dynamic balancing of a transmission shaft assembly, comprising a fixture base (1), a clamping jaw (4) and a guide block (3), wherein: The guide block (3) is inserted into the center of the tooling base (1), the clamping claw (4) is assembled on the tooling base (1) and connected to the guide block (3), the ball cage (6) is fixed on the tooling base (1) through the clamping claw (4), and the end cover (8) at the bottom of the ball cage (6) is in contact with the guide block (3).
2. The self-centering fixture for dynamic balancing of a transmission shaft assembly according to claim 1, characterized in that: A spring (2) is provided between the bottom of the guide block (3) and the tooling base (1).
3. The self-centering fixture for dynamic balancing of a transmission shaft assembly according to claim 1 or 2, characterized in that: A screw rod (5) is fixed on the tooling base (1), a ball cage (6) passes through the screw rod (5), and a nut (7) is mounted on the top of the screw rod (5).
4. The self-centering fixture for dynamic balancing of a transmission shaft assembly according to claim 3 is characterized in that: Three clamping jaws (4) are evenly distributed on the tooling base (1); the tooling base (1) and the clamping jaws (4) are connected via a T-shaped slot, and the clamping jaws (4) slide along the T-shaped slot.
5. The self-centering fixture for dynamic balancing of a transmission shaft assembly according to claim 4 is characterized in that: The clamping jaw (4) is connected to the outer inclined surface of the guide block (3); the clamping jaw (4) and the guide block (3) are connected via a T-shaped slot; the clamping jaw (4) slides along the inclined surface of the guide block (3).