Clamping tool for cross joint

Abstract

The utility model relates to the technical field of workpiece clamping, in particular to a clamping tool for a cross joint, which comprises a clamp base and a cover plate, a square column is arranged at the upper end of the clamp base, a V-shaped groove is arranged on each surface of the square column, the V-shaped grooves penetrate through the upper end of the square column, the cover plate is detachably connected to the upper end of the clamp base, and the cover plate is detachably connected to the upper end of the clamp base. The cross joint is connected into the square column, each joint column of the cross joint is arranged in the corresponding V-shaped groove, the joint columns are tangent to the inclined faces of the V-shaped grooves, and when the cover plate is connected with the clamp base, the upper ends of the V-shaped grooves are closed. The joint column is fixed in the V-shaped groove through the cover plate, the cross joint is prevented from moving in the V-shaped groove, the whole clamping tool is simple in structure and high in stability, the cross joint cannot deviate when being machined in the tool, machining errors are avoided, and the accuracy of machining precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and in particular to a clamping fixture for cross joints. Background Technology

[0002] In helicopter repair, the internal cross joints of helicopters often develop cracks due to the expiration of their service life and require replacement in large quantities. Therefore, it is necessary to manufacture corresponding cross joints to meet the needs of helicopter maintenance. Machining the cross joints requires drilling and milling the joint posts. The existing method is to machine the cross joints using a machining center. However, machining center clamping is difficult and it is hard to guarantee product quality, especially in mass production. To ensure production efficiency, there is an urgent need to use specialized tooling for clamping and to guarantee the pass rate. Furthermore, cross joints often use machining centers to drill center holes. For each product, the four directions of the joint require alignment with the center line and reference point during clamping, resulting in low machining efficiency and difficulty in ensuring the coaxiality of the center holes. Utility Model Content

[0003] In view of the technical problems existing in the background art, the purpose of this utility model is to provide a clamping fixture for cross joints to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A clamping fixture for a cross-shaped connector includes a connector base and a plurality of connector posts disposed on the connector base. The fixture base includes a clamping base and a cover plate. A square post is disposed at the upper end of the clamping base, and a V-groove is provided on each surface of the square post, extending through the upper end of the square post. The cover plate is detachably connected to the upper end of the clamping base. The cross-shaped connector is connected inside the square post, and each connector post of the cross-shaped connector is disposed within the V-groove. The connector post is tangential to the inclined surface of the V-groove. When the cover plate is connected to the clamping base, the upper end of the V-groove is closed.

[0006] Preferably, the square column has a support groove inside, and the connector is connected to the support groove.

[0007] Preferably, the square column is provided with a plurality of connecting holes I, which are located in the axial direction of the fixture base.

[0008] Preferably, the cover plate is provided with a plurality of connecting holes II, wherein the connecting holes I and the connecting holes II are aligned.

[0009] Preferably, the lower end of the cover plate is provided with a groove, the shape of which is consistent with the shape of the upper end of the connector. When the cover plate is connected to the square post, the connector is set in the groove.

[0010] Preferably, the upper end of the cover plate is provided with a through hole, which penetrates the cover plate.

[0011] Preferably, a rod is provided in the support groove, and a slot is provided on the cross joint. The rod is connected to the slot. When the cover plate and the square column are connected, the rod extends into the through hole.

[0012] Preferably, the lower end of the cover plate is tangential to the joint post.

[0013] This utility model has the following advantages and beneficial effects:

[0014] In this invention, each surface of the square column is provided with a V-groove. The connector column is tangent to the inclined surface of the V-groove, and several tangent points are on the same straight line parallel to the ground. When the cross connector is connected inside the square column, the support groove and the V-groove keep the cross connector stable. The lower end of the cover plate is tangent to the connector column, and the cover plate fixes the connector column in the V-groove to prevent the cross connector from moving inside the V-groove. The entire clamping fixture has a simple structure and strong stability. The cross connector will not shift during processing in the fixture, avoiding processing errors and ensuring accurate processing precision. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a clamping fixture for a cross joint proposed in this utility model;

[0016] Figure 2 An exploded view of a clamping fixture for a cross joint proposed in this utility model;

[0017] Figure 3 This is a cross-sectional view of a clamping fixture for a cross joint proposed in this utility model.

[0018] Reference numerals: 1-Clamp base, 2-Square column, 21-V-groove, 22-Support groove, 23-Connecting hole I, 24-Insertion rod, 3-Cover plate, 31-Groove, 32-Through hole, 33-Connecting hole II, 4-Cross connector, 41-Connector, 42-Slot, 43-Connector post. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Example

[0022] like Figures 1-3 As shown, a clamping fixture for a cross-shaped connector includes a fixture base 1 and a cover plate 3. The cross-shaped connector 4 includes a receiving seat 41 and a plurality of connector posts 43 disposed on the receiving seat 41. The fixture base 1 is disposed in a machining center and serves as the main support body of the fixture. A square post 2 is disposed at the upper end of the fixture base 1. A support groove 22 is disposed inside the square post 2. A V-groove 21 is disposed on each surface of the square post 2. The V-groove 21 penetrates the upper end of the square post 2 and is connected to the support groove 22. The cross-shaped connector 4 is connected inside the square post 2. Specifically, the receiving seat 41 of the cross-shaped connector 4 is connected inside the support groove 22, and the connector posts 43 of the cross-shaped connector 4 extend out from the V-groove 21. Each connector post 43 corresponds to one V-groove 21.

[0023] like Figures 1-3 As shown, when the connector post 43 of the cross connector 4 is connected in the V-groove 21, the cross connector 4 is supported in the square column 2 and will not rotate in the square column 2. The V-shaped surface of the V-groove 21 is designed according to the diameter of the connector post 43. When each connector post 43 of the cross connector 4 is connected in the V-groove 21, the connector post 43 is tangent to the inclined surface of the V-groove 21, and several tangent points are on the same straight line parallel to the ground. When the cross connector 4 is connected in the square column 2, the support groove 22 and the V-groove 21 keep the cross connector 4 stable. At the same time, different cross connectors 4 placed in the square column 2 can maintain accurate positions without positioning, which greatly reduces the steps during clamping and increases the clamping efficiency.

[0024] like Figures 1-3 As shown, the cover plate 3 is detachably connected to the upper end of the clamp base 1. When the cover plate 3 is connected to the clamp base 1, the upper end of the V-groove 21 is closed, and the lower end of the cover plate 3 is tangent to the connector post 43. The connector post 43 is not only tangent to the V-groove 21, but also tangent to the cover plate 3. The cover plate 3 fixes the connector post 43 in the V-groove 21 to prevent the cross connector 4 from moving in the V-groove 21.

[0025] like Figures 1-3As shown, the square column 2 is provided with several connecting holes I23, which are located in the axial direction of the fixture base 1. The cover plate 3 is provided with several connecting holes II33. When the cover plate 3 and the square column 2 are connected, the connecting holes I23 and II33 are aligned. The cover plate 3 and the square column 2 are detachably connected by bolts. The connecting holes I23 and II33 are threaded. When the connecting holes I23 and II33 are aligned, bolts are screwed into the connecting holes I23 and II33 to fix the cover plate 3 and the square column 2, ensuring the clamping strength of the cross joint 4 and preventing the cross joint 4 from moving during processing. The detachable design facilitates the assembly and disassembly of the entire fixture and greatly increases the clamping efficiency.

[0026] like Figures 1-3 As shown, the lower end of the cover plate 3 is provided with a groove 31. The shape of the groove 31 is consistent with the shape of the upper end of the connector 41. When the cover plate 3 is connected to the square post 2, the connector 41 is set in the groove 31. Since the size of the connector 41 is larger than the size of the connector post 43, after the groove 31 is set, the upper end of the connector 41 extends into the groove 31, and the lower end of the cover plate 3 can contact the connector post 43. At the same time, when the cross connector 4 is placed in the square post 2, the groove 31 can play the role of positioning the connecting hole I 23 and the connecting hole II 33. During installation, the cover plate 3 is directly connected to the cross connector 4, and the connecting hole I 23 and the connecting hole II 33 can be aligned.

[0027] like Figures 1-3 As shown, a rod 24 is provided in the support groove 22, and a slot 42 is provided on the cross joint 4. The rod 24 is connected to the slot 42. The rod 24 is located in the middle of the support groove 22, and the slot 42 is located in the middle of the cross joint 4. When the cross joint 4 is connected to the square post 2, the rod 24 can be directly connected to the slot 42. After the rod 24 is connected to the slot 42, the joint post 43 is connected to the V-groove 21, and the extension distance of each joint post 43 in the V-groove 21 is the same. The upper end of the cover plate 3 is provided with a through hole 32, which penetrates the cover plate 3. After the cover plate 3 is connected to the square post 2, the rod 24 extends into the through hole 32. The rod 24 further increases the stability of the overall structure. After the V-groove 21 is connected to the cover plate 3, the cross joint 4 will not be offset during the machining in the tooling, avoiding machining errors and ensuring the accuracy of machining.

[0028] This is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clamping tool for a cross joint, the cross joint comprising a socket and a plurality of joint posts arranged on the socket, characterized in that, The fixture includes a clamp base and a cover plate. A square post is provided at the upper end of the clamp base. A V-shaped groove is provided on each surface of the square post, and the V-shaped groove extends through the upper end of the square post. The cover plate is detachably connected to the upper end of the clamp base. A cross joint is connected inside the square post, and each joint post of the cross joint is set in the V-shaped groove. The joint post is tangent to the inclined surface of the V-shaped groove. When the cover plate is connected to the clamp base, the upper end of the V-shaped groove is closed.

2. A clamping tool for a cross joint according to claim 1, characterized in that: The square column has a support groove inside, and the connector is connected to the support groove.

3. A clamping tool for a cross joint according to claim 1, characterized in that: The square column is provided with several connecting holes I, which are located in the axial direction of the fixture base.

4. A clamping fixture for a cross-shaped connector according to claim 3, characterized in that: The cover plate is provided with a plurality of connecting holes II, and the connecting holes I and connecting holes II are aligned.

5. A clamping tool for a cross joint according to claim 2, characterized in that: The lower end of the cover plate is provided with a groove, the shape of which is consistent with the shape of the upper end of the connector. When the cover plate is connected to the square column, the connector is set in the groove.

6. A clamping tool for a cross joint according to claim 5, characterized in that: The upper end of the cover plate is provided with a through hole, which penetrates the cover plate.

7. A clamping tool for a cross joint according to claim 6, characterised in that: A rod is provided in the support groove, and a slot is provided on the cross joint. The rod is connected to the slot. When the cover plate and the square column are connected, the rod extends into the through hole.

8. The assembly fixture for a universal joint of claim 1, wherein: The lower end of the cover plate is tangential to the joint post.

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