A quick-change gear grinding device for large-diameter shaft parts

Abstract

This utility model relates to a quick-change gear grinding device for large-diameter shaft parts, comprising: a clamping body, the clamping body having a hollow structure, and a pulling mechanism capable of vertical movement installed within the hollow structure. The end of the pulling mechanism is provided with an adhesive expansion sleeve for clamping the parts. This structural design effectively simplifies the original complex machining process, avoids machining risks caused by plug assembly, and significantly improves clamping stability and operational convenience. This device fixture is widely applicable to gear grinding of shaft and gear parts, not only greatly improving clamping efficiency and machining accuracy but also effectively shortening the production cycle and reducing overall production costs, providing a reliable and efficient technical solution for gear grinding of large-diameter shaft parts.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically a quick-change gear grinding device for large-diameter shaft parts. Background Technology

[0002] In gear grinding of shaft parts, large-diameter shaft parts present unique machining challenges. The traditional method involves assembling a plug at the large-diameter end of the part and machining using the plug's center hole. However, this method has several drawbacks:

[0003] 1. Cumbersome process: It requires additional processes for assembling plugs and internal grinding, which consumes time and manpower and reduces production efficiency.

[0004] 2. Coaxiality issue: It is difficult to ensure coaxiality between the plug and the inner hole axis of the part, which affects the machining accuracy and makes it difficult to meet the requirements of high-precision products. Summary of the Invention

[0005] This utility model provides a high-efficiency quick-change gear grinding device for large-diameter shaft parts, which solves the problem that large-diameter shaft parts cannot be directly processed on gear grinding machines, simplifies the processing steps, avoids various hidden dangers caused by end-cap assembly, improves clamping stability and ease of operation, increases processing accuracy and production efficiency, and reduces overall costs.

[0006] The technical solution of this utility model:

[0007] A quick-change gear grinding device for large-diameter shaft parts includes: a clamping body, the clamping body having a hollow structure, a pulling mechanism that can move up and down installed inside the hollow structure, and an adhesive expansion sleeve for clamping the parts provided at the end of the pulling mechanism.

[0008] The pulling mechanism includes: a pull rod installed in the hollow structure, a screw installed on the outside of the clamp, the screw being connected to the end of the pull rod, and a helical compression spring being fitted on the screw.

[0009] The screw is an internally threaded hexagonal screw.

[0010] The clamp has a tapered structure, which is fitted with an adhesive expansion sleeve.

[0011] The adhesive expansion sleeve is a tapered sleeve made of 6-lobed tapered bodies bonded together with vulcanized sealant.

[0012] The end of the adhesive expansion sleeve is provided with an installation protrusion, and the end of the pull rod is provided with a groove that engages with the installation protrusion.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. The process of this utility model is simplified: it abandons the traditional plug assembly process, directly clamps the parts, greatly shortens the processing preparation time, and improves production efficiency.

[0015] 2. Avoid potential machining problems: No need to use plugs, eliminating problems such as misalignment of axes and inconsistent datum, ensuring the quality and precision of part machining.

[0016] 3. High clamping stability: The expansion sleeve evenly tightens the inner hole of the part, providing a stable clamping force. The part is not easy to shift or vibrate during the gear grinding process, ensuring consistent machining accuracy.

[0017] 4. Easy to operate: clamping and disassembly can be completed by simply rotating the screw, reducing the difficulty of operation for workers and reducing labor intensity.

[0018] 5. Reduced overall costs: Improved clamping efficiency and machining accuracy, shortened production cycle, reduced scrap rate, and reduced overall production costs such as manpower and materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the quick-change gear grinding device for large-diameter shaft parts. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the quick-change gear grinding device for large-diameter shaft parts. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the quick-change gear grinding device for large-diameter shaft parts. Figure 3 ;

[0022] Figure 4 This is a schematic diagram of the integrated structure of the pull rod and expansion sleeve of the quick-change gear grinding device for large-diameter shaft parts of this utility model;

[0023] Figure 5 This is a schematic diagram of the clamping body structure.

[0024] In the diagram: 1. Part; 2. Adhesive expansion sleeve; 3. Clamp body; 4. Pull rod; 5. Screw; 6. Compression spring; 21. Mounting protrusion; 41. Groove. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0026] like Figure 1-3As shown, this utility model provides a quick-change gear grinding device for large-diameter shaft parts, including: a clamping body 3, the clamping body 3 having a hollow structure, a pulling mechanism that can move up and down installed inside the hollow structure, and an adhesive expansion sleeve 2 for clamping the part 1 provided at the end of the pulling mechanism.

[0027] Among them, such as Figure 4 , 5 As shown, the pulling mechanism includes: a pull rod 4 installed within the hollow structure; a screw 5 mounted on the outside of the clamping body 3; the screw 5 being connected to the end of the pull rod 4; and a helical compression spring 6 fitted onto the screw 5. The screw 5 is an M8 internal thread hexagonal screw. The M8 internal thread hexagonal screw is used to connect the pull rod 4 and apply tension, causing the adhesive expansion sleeve 2 and the clamping body 3 to move up and down at a 1:5 taper, thereby tightening or loosening part 1 by the adhesive expansion sleeve 2.

[0028] In addition, the clamping body 3 has a 1:5 taper structure, which fits into the adhesive expansion sleeve 2 and is used to tighten the inner hole of the part 1. The adhesive expansion sleeve 2 is a tapered sleeve made of 6 taper bodies bonded together with vulcanized sealant. The end of the adhesive expansion sleeve 2 is provided with a mounting protrusion 21, and the end of the pull rod 4 is provided with a groove 41 that engages with the mounting protrusion 21.

[0029] The adhesive expansion sleeve 2 and the clamping body 3 are fitted together with a 1:5 taper. The pull rod 4 is installed inside the clamping body 3 and connected to the adhesive expansion sleeve 2. At this time, the part is in an unclamped state.

[0030] By tightening screw 5, a pulling force is applied to pull rod 4. Pull rod 4 moves within clamping body 3, causing adhesive expansion sleeve 2 to move downwards along the 1:5 taper of clamping body 3 or in a direction that increases the outer diameter of the tapered sleeve. Since adhesive expansion sleeve 3 is composed of 6 tapered bodies, its outer diameter gradually increases during movement, thereby tightening the inner hole of the part and achieving clamping and fixing of part 1.

[0031] Loosen screw 5, and use the elastic force of cylindrical helical compression spring 6 to move pull rod 4 and adhesive expansion sleeve 2 upward along the 1:5 taper of clamp body 3 (or in the direction that reduces the outer diameter of the tapered sleeve) under the action of their own elasticity or other reset mechanism. The outer diameter becomes smaller, and the tension on the inner hole of part 1 is released, so the part can be disassembled.

[0032] The cylindrical helical compression spring 6 is installed at a specific position inside the clamping body 3. When the pull rod 4 is not subjected to external force or the external force is removed, the spring force will reset the pull rod 4 and the adhesive expansion sleeve 2 so as to facilitate the next clamping operation.

[0033] The working process of this utility model is as follows:

[0034] Component assembly pre-testing:

[0035] Insert the pull rod 4 into the clamp body 3 and test the smoothness of its movement to ensure that it can slide smoothly along the axial direction within the clamp body 3 without jamming. Make the adhesive expansion sleeve 2 and the clamp body 3 fit precisely at a 1:5 taper with a contact area greater than 85%. Connect the screw 5 to the pull rod 4 to confirm that the connection is reliable. At the same time, check the elasticity of the cylindrical helical compression spring 6 to ensure that the elastic force is normal.

[0036] Part clamping process:

[0037] 1. Workpiece positioning: Place the large-diameter shaft part 1 to be processed on the outside of the adhesive expansion sleeve 2, adjust the position so that the inner hole of part 1 is coaxial with the expansion sleeve 2, and prepare for tensioning and clamping.

[0038] 2. Tightening Operation: Use an Allen wrench to slowly tighten the M8 socket head cap screw 5. During this process, the M8 socket head cap screw 5 generates axial tension, pulling the pull rod 4 along the axis of the fixture body 3. The pull rod 4 drives the adhesive expansion sleeve 2 to move downwards along the 1:5 taper slope of the fixture body 3. Due to the taper fit, the outer diameter of the expansion sleeve 2 is compressed and expanded evenly, continuously tightening the inner hole of part 1 until the expansion sleeve 2 and the inner hole of part 1 are tightly fitted, completing the clamping. After clamping, the fixture and part 1 can be installed as a whole at the designated station of the gear grinding machine for gear grinding.

[0039] Parts disassembly process:

[0040] After the gear grinding is completed, disassemble part 1 according to the following steps: Operate the Allen wrench in reverse and rotate the M8 Allen screw 5 to loosen it. At this time, the cylindrical helical compression spring 6 releases its elastic force, pushing the pull rod 4 and the adhesive expansion sleeve 2 to move upwards along the 1:5 taper slope of the clamping body 3; as the expansion sleeve 2 moves upwards, its outer diameter gradually contracts due to the taper fit, releasing the tension on the inner hole of part 1. Part 1 can then be easily removed, completing one machining cycle.

[0041] This utility model relates to a high-efficiency quick-change device fixture for shaft gear grinding, which solves the problem that large-diameter shaft parts cannot be directly processed on gear grinding machines. It simplifies the processing steps, avoids various hidden dangers caused by end-cap assembly, improves clamping stability and ease of operation, increases processing accuracy and production efficiency, and reduces overall costs.

[0042] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. A quick-change gear grinding device for large-diameter shaft parts, characterized in that, include: The clamping body (3) has a hollow structure inside. A pulling mechanism that can move up and down is installed inside the hollow structure. The end of the pulling mechanism is provided with an adhesive expansion sleeve (2) for clamping the part (1).

2. The quick-change gear grinding device for large-diameter shaft parts according to claim 1, characterized in that, The pulling mechanism includes: a pull rod (4) installed in the hollow structure, a screw (5) installed on the outside of the clamping body (3), the screw (5) being connected to the end of the pull rod (4), and a helical compression spring (6) being fitted on the screw (5).

3. The quick-change gear grinding device for large-diameter shaft parts according to claim 2, characterized in that, The screw (5) is an internally threaded hexagonal screw.

4. The quick-change gear grinding device for large-diameter shaft parts according to claim 1 or 2, characterized in that, The clamping body (3) has a 1:5 taper structure, which is fitted with the adhesive expansion sleeve (2).

5. The quick-change gear grinding device for large-diameter shaft parts according to claim 3, characterized in that, The adhesive expansion sleeve (2) is a cone sleeve made of 6-lobed tapered bodies bonded together with vulcanized sealant.

6. The quick-change gear grinding device for large-diameter shaft parts according to claim 4, characterized in that, The end of the adhesive expansion sleeve (2) is provided with an installation protrusion (21), and the end of the pull rod (4) is provided with a groove (41) that engages with the installation protrusion (21).

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