A shaft positioning fixture

Abstract

This utility model discloses a shaft positioning fixture, which aims to use a groove to set positioning blocks, ensuring that each first arc-shaped notch is coaxial, and using the first arc-shaped notch to place the shaft is more accurate. The technical solution is as follows: A shaft positioning fixture includes a platform, on which a groove is provided. The groove extends along a first direction and both ends along the first direction are open. The bottom of the groove has an inverted T-shaped groove extending along the first direction, and both ends of the inverted T-shaped groove are open. Multiple positioning blocks are arranged at intervals along the first direction within the groove. Bolts are provided on the positioning blocks, and the bolts cooperate with the inverted T-shaped groove to press the positioning blocks tightly against the bottom of the groove. The top of the positioning block has a first arc-shaped notch adapted to the outer diameter of the shaft. The width direction of the groove is a second direction, and the length of the positioning block in the second direction is adapted to the width of the groove. This belongs to the field of fixture technology.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology, and more specifically, relates to a positioning clamp for a shaft. Background Technology

[0002] When performing end milling on a shaft, a special fixture is required to facilitate positioning the shaft. Generally, the shaft is supported by multiple blocks with V-grooves to facilitate placement. Then, a clamping device is used to press the shaft onto the blocks, allowing for end milling.

[0003] However, this method is very troublesome because of errors in the installation of the blocks and deviations in the machining of the V-groove. Shims are often attached inside the V-groove to adjust the position of the shaft so that it can be coaxial with the drill bit. Summary of the Invention

[0004] The main purpose of this utility model is to provide a shaft positioning fixture, which uses grooves to set positioning blocks to ensure that each first arc-shaped notch is coaxial, and uses the first arc-shaped notch to place the shaft for greater precision.

[0005] According to a first aspect of the present invention, a shaft positioning fixture is provided, including a platform, a groove provided on the platform, the groove extending along a first direction and both ends of the groove being open ends, and an inverted T-shaped groove extending along the first direction being provided at the bottom of the groove, the inverted T-shaped groove being open ends of both ends of the groove along the first direction.

[0006] Multiple positioning blocks are arranged at intervals along a first direction in the groove. Each positioning block is provided with a bolt, which cooperates with the inverted T-shaped groove to press the positioning block tightly against the bottom of the groove. The top of the positioning block is provided with a first arc-shaped notch that matches the outer diameter of the shaft. The width direction of the groove is a second direction, and the length of the positioning block in the second direction matches the width of the groove.

[0007] In the aforementioned shaft positioning fixture, the platform is provided with a clamping device, which includes a clamping block located above the groove and a drive module for driving the clamping block to rise and fall. The clamping block is provided with a second arc-shaped notch, which is used to contact the shaft so that the clamping block can press the shaft onto the positioning block.

[0008] In the aforementioned shaft positioning fixture, the bottom of the groove is provided with two slots, which are symmetrical about the inverted T-shaped groove. A first support plate is provided in the slot, which is located between two adjacent positioning blocks. The two ends of the first support plate along the first direction abut against the two adjacent positioning blocks respectively.

[0009] In the above-mentioned shaft positioning fixture, the positioning block away from the tool is the outer positioning block. The outer positioning block has a second support plate on the side facing away from the first support plate. The second support plate is inserted into the slot. The platform has a threaded hole at the end away from the tool. The threaded hole extends along the first direction and communicates with the slot. A screw is threaded into the threaded hole, and the screw can abut against the second support plate.

[0010] In the aforementioned shaft positioning fixture, the inner diameter of the threaded hole is 4 to 7 times the width of the slot.

[0011] In the aforementioned shaft positioning fixture, the positioning block includes a horizontal plate and a vertical plate. The horizontal plate mates with the groove, and the vertical plate is fixed to the horizontal plate. The first arc-shaped notch is located at the top of the vertical plate.

[0012] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0013] In this invention, grooves are used to position and install positioning blocks. By controlling the precision of the grooves, each positioning block in the groove can be installed on the same straight line. Thus, the first arc-shaped notch can naturally be coaxial. When the tool is set, it will also be coaxial with the first arc-shaped notch. The shaft can be aligned with the tool when placed in the first arc-shaped notch. There is no need to attach shims, which reduces assembly errors and improves installation accuracy while facilitating installation. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a top view of the first embodiment of the present invention;

[0016] Figure 2 This is a front view of the first embodiment of the present invention after the screws have been removed;

[0017] Figure 3 This is a top view of the first embodiment of the present invention after the clamping block has been removed.

[0018] The figure labels for each figure are as follows:

[0019] 1. Platform; 11. Groove; 12. Inverted T-groove; 13. Slot; 2. Positioning block; 21. First arc-shaped notch; 22. Horizontal plate; 23. Vertical plate; 3. Bolt; 4. Clamping device; 41. Clamping block; 411. Second arc-shaped notch; 42. Drive module; 5. First support plate; 6. Second support plate; 7. Threaded hole; 8. Screw. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0022] Reference Figures 1 to 3 As shown, a shaft positioning fixture includes a platform 1, on which a groove 11 is provided. The groove 11 extends along a first direction and both ends along the first direction are open ends. The bottom of the groove 11 is provided with an inverted T-shaped groove 12 extending along the first direction, and both ends of the inverted T-shaped groove 12 along the first direction are open ends.

[0023] Multiple positioning blocks 2 are arranged at intervals along the first direction in the groove 11. Bolts 3 are provided on the positioning blocks 2. The bolts 3 cooperate with the inverted T-shaped groove 12 to press the positioning blocks 2 into the bottom of the groove 11. The top of the positioning blocks 2 is provided with a first arc-shaped notch 21 that matches the outer diameter of the shaft. The width direction of the groove 11 is the second direction. The length of the positioning blocks 2 in the second direction matches the width of the groove 11.

[0024] A groove 11 is provided, and the mating dimensions between the groove 11 and the positioning block 2 are limited. By controlling the precision of the groove 11 and the positioning block 2, the positioning block 2 can be arranged in the groove 11 along the same straight line. Then, each of the first arc-shaped notches 21 can naturally be coaxial. The positioning block 2 is fixed based on the bolt 3 and the inverted T-slot 12, and can be disassembled and changed at any time. Therefore, the positioning block 2 can be adjusted according to the length of the shaft. The frame will also be equipped with corresponding machining tools. The tools will be set according to the position of the groove 11. The shaft can be aligned with the tool when placed in the first arc-shaped notch 21 without the need for shims, reducing assembly errors and improving installation accuracy while facilitating installation.

[0025] Platform 1 is movable. Once the shaft is fixed, platform 1 can be moved to allow the end face of the shaft to contact the cutting tool for machining.

[0026] In this embodiment, the bolt 3 includes a screw and a head. The screw passes through the positioning block 2 and enters the inverted T-groove 12, where it is threadedly connected to the nut in the inverted T-groove 12. The positioning block 2 can be pressed against the bottom of the groove 11 by the head and the nut.

[0027] In this embodiment, the positioning block 2 includes a horizontal plate 22 and a vertical plate 23. The horizontal plate 22 cooperates with the groove 11, and the vertical plate 23 is fixed on the horizontal plate 22. The first arc-shaped notch 21 is set on the top of the vertical plate 23. The bolt 3 generally cooperates with the horizontal plate 22 to fix the positioning block 2, while the vertical plate 23 can increase the height of the positioning block 2 to facilitate the placement of the shaft.

[0028] In this embodiment, a pressing device 4 is provided on the platform 1. The pressing device 4 includes a pressing block 41 located above the groove 11 and a driving module 42 for driving the pressing block 41 to rise and fall. The pressing block 41 is provided with a second arc-shaped notch 411 for contacting the shaft. The driving module 42 drives the pressing block 41 to fall so that the pressing block 41 can press the shaft onto the positioning block 2 to complete the fixing of the shaft.

[0029] The drive module 42 is generally a hydraulic cylinder, which has sufficient power; moreover, the hydraulic cylinder is supplied with oil through an oil pipe, which can move along with the platform 1 and is not easily torn.

[0030] In this embodiment, the bottom of the groove 11 is provided with two slots 13, which are symmetrical about the inverted T-shaped groove 12. A first support plate 5 is provided in the slot 13. The first support plate 5 is located between two adjacent positioning blocks 2, and the two ends of the first support plate 5 along the first direction abut against the two adjacent positioning blocks 2 respectively.

[0031] During machining, the axial force is away from the tool, and the positioning block 2 is fixed by the bolt 3. Under long-term drilling and milling, the positioning block 2 may easily shift. Therefore, a first support plate 5 is set up. The first support plate 5 is positioned by the slot 13 and maintains an upright posture, so it can be supported between two adjacent positioning blocks 2, which can prevent the distance between two adjacent positioning blocks 2 from changing.

[0032] Generally, the first support plate 5 is supported between the horizontal plates 22 of two adjacent positioning blocks 2.

[0033] Preferably, the positioning block 2 away from the tool is the outer positioning block 2. The outer positioning block 2 is provided with a second support plate 6 on the side facing away from the first support plate 5. The second support plate 6 is inserted into the slot 13. The end of the platform 1 away from the tool is provided with a threaded hole 7. The threaded hole 7 extends along the first direction and communicates with the slot 13. A screw 8 is threaded in the threaded hole 7. The screw 8 can abut against the second support plate 6.

[0034] Since the axial force on the shaft is directed away from the tool, the positioning block 2 that is close to the tool will only shift in the direction away from the tool, and can be supported by the first support plate 5. The second support plate 6 mainly supports the positioning block 2 that is furthest from the tool. Rotating the screw 8 can adjust the length of the screw 8 in the threaded hole 7, thereby pressing the second support plate 6.

[0035] In practice, the slot 13 needs to be milled first, and then the threaded hole 7 needs to be machined to ensure that the screw 8 can fit into the threaded hole 7.

[0036] In this embodiment, since the slot 13 and the threaded hole 7 are connected, the internal thread of the threaded hole 7 is somewhat incomplete. If the incomplete area is too large, the screw 8 will not be secure. Therefore, the inner diameter of the threaded hole 7 is controlled to be 4 to 7 times the width of the slot 13, so that the inner diameter of the threaded hole 7 is larger and the width of the slot 13 is smaller, thus making the incomplete area of ​​the internal thread of the threaded hole 7 smaller.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shaft positioning fixture, characterized in that, The device includes a platform, on which a groove is provided. The groove extends along a first direction and both ends along the first direction are open. The bottom of the groove is provided with an inverted T-shaped groove extending along the first direction, and both ends of the inverted T-shaped groove along the first direction are open. Multiple positioning blocks are arranged at intervals along a first direction in the groove. Each positioning block is provided with a bolt, which cooperates with the inverted T-shaped groove to press the positioning block tightly against the bottom of the groove. The top of the positioning block is provided with a first arc-shaped notch that matches the outer diameter of the shaft. The width direction of the groove is a second direction, and the length of the positioning block in the second direction matches the width of the groove.

2. The shaft positioning fixture according to claim 1, characterized in that, The platform is equipped with a clamping device, which includes a clamping block located above the groove and a drive module for driving the clamping block to rise and fall. The clamping block is provided with a second arc-shaped notch, which is used to contact the shaft so that the clamping block can press the shaft onto the positioning block.

3. The shaft positioning fixture according to claim 1, characterized in that, The bottom of the groove is provided with two slots, which are symmetrical about the inverted T-shaped groove. A first support plate is provided in the slot, which is located between two adjacent positioning blocks. The two ends of the first support plate along the first direction abut against the two adjacent positioning blocks respectively.

4. The shaft positioning fixture according to claim 3, characterized in that, The positioning block away from the tool is an outer positioning block. A second support plate is provided on the side of the outer positioning block facing away from the first support plate. The second support plate is inserted into the slot. A threaded hole is provided at the end of the platform away from the tool. The threaded hole extends along the first direction and communicates with the slot. A screw is threaded into the threaded hole, and the screw can abut against the second support plate.

5. The shaft positioning fixture according to claim 4, characterized in that, The inner diameter of the threaded hole is 4 to 7 times the width of the slot.

6. The shaft positioning fixture according to claim 1, characterized in that, The positioning block includes a horizontal plate and a vertical plate. The horizontal plate mates with the groove, and the vertical plate is fixed to the horizontal plate. The first arc-shaped notch is located at the top of the vertical plate.

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