Split welding type clutch hub

Abstract

The utility model provides a split welding type clutch hub which is provided with a clutch oil cylinder and a clutch cylinder body, an outer spigot is arranged on the clutch oil cylinder, an inner spigot is arranged on the clutch cylinder body, the outer spigot and the inner spigot are in interference fit, and the clutch oil cylinder and the clutch cylinder body are fixed through welding. The clutch cylinder body is a heat treatment part, internal splines are arranged in the clutch cylinder body, the internal splines are evenly distributed in the clutch cylinder body, an oil passing hole is formed in the clutch cylinder body, and the internal splines, corresponding to the oil passing hole, in the clutch cylinder body are removed. The integrated clutch hub solves the technical problems that an existing integrated clutch hub needs to be formed through a cold extrusion process by imported spinning equipment and needs to be put into a matched die, so that cost is too high, production is limited, a product integrally formed through cold extrusion cannot be subjected to heat treatment, the pressure bearing capacity of an internal spline is insufficient, and the use performance and the service life of the product are affected. The utility model can be widely applied to wet clutches.

Description

Technical Field

[0001] The utility model relates to a clutch hub, in particular to a split-welded clutch hub. Background Art

[0002] In a wet clutch assembly, the clutch hub is usually an integral type, with an inner cavity provided with an internal spline. The processing of the inner spline of the integral structure requires a 3-4mm tool-back groove. Leaving a tool-back groove in the clutch hub will seriously affect the overall performance of the clutch. Therefore, the integral clutch hub can only be formed into an integral inner cavity using a cold extrusion process. Since the cold extrusion process requires spinning equipment to be executed, this equipment is subject to import restrictions, is costly and difficult to purchase, making it difficult to put the product into production. In addition, this structure requires the use of a matching mold for production, further increasing production costs. In addition, cold extrusion is an integral molding process, and heat treatment of the workpiece will cause deformation of the product. Therefore, the workpiece cannot be heat treated, resulting in insufficient pressure-bearing capacity of the spline in the workpiece, which reduces the service life of the workpiece. Summary of the Invention

[0003] The utility model addresses the technical problems that the existing integral clutch hub needs to be formed by a cold extrusion process using imported spinning equipment and requires the production of matching molds, which leads to excessively high costs and limited production. In addition, the cold-extruded one-piece molded product cannot be heat-treated, resulting in insufficient pressure-bearing capacity of the internal spline, which affects the performance and life of the product. The utility model provides a split-welded clutch hub that does not require imported equipment or additional molds, greatly reduces production costs, can improve the pressure-bearing capacity of the internal spline through heat treatment, effectively guarantees product quality, and extends service life.

[0004] The utility model provides a split-welded clutch hub, which is provided with a clutch cylinder and a clutch cylinder body, wherein the clutch cylinder is provided with an outer stop, and the clutch cylinder body is provided with an inner stop, the outer stop and the inner stop are interference fit, and the clutch cylinder and the clutch cylinder body are fixed by welding; the clutch cylinder body is a heat-treated part, and the clutch cylinder body is provided with internal splines, and the internal splines are evenly distributed within the clutch cylinder body, and the clutch cylinder body is provided with oil holes, and the internal splines in the clutch cylinder body corresponding to the oil holes are removed.

[0005] Preferably, the clutch oil cylinder and the clutch cylinder body are fixed by radial welding using a high-energy beam.

[0006] Preferably, the oil hole is a radial through hole perpendicular to the clutch cylinder body, and is in the form of a waist hole or a round hole.

[0007] Preferably, a retaining ring groove is provided at the end of the clutch cylinder body.

[0008] Preferably, the clutch cylinder body and the clutch oil cylinder are both made of profiles.

[0009] The beneficial effects of the utility model are:

[0010] (1) The clutch oil cylinder and clutch cylinder body are both made of profiles and can be heat treated before finishing to improve the pressure bearing capacity of the parts and increase the service life of the clutch. Moreover, the clutch cylinder body after heat treatment will not be deformed when processed without increasing the wall thickness. It can be processed as needed to better meet design requirements.

[0011] (2) Compared with cold extrusion processing, the split welding method reduces the capital investment in spinning equipment and molds, especially avoids dependence on imported equipment, and thus the product production is no longer restricted by foreign imports, making the production efficiency of new products higher;

[0012] (3) The split structure allows the internal splines to be machined in the clutch cylinder after heat treatment, and then fixed to the clutch cylinder after processing. This avoids the problem of the integral clutch hub requiring a back-off groove for machining the internal splines, which affects product performance. The internal splines of the integral clutch hub are formed by integral extrusion, which will cause product deformation during heat treatment and cannot be heat treated, resulting in poor bearing capacity, which seriously affects the product life.

[0013] (4) The clutch cylinder body and the clutch oil cylinder adopt interference fit with the stopper and are fixed by radial welding, which ensures a firm and reliable connection.

[0014] (5) With the split clutch hub, the clutch cylinder body and the clutch oil cylinder can be configured with different sizes as needed. The same clutch cylinder body can be configured with clutch oil cylinders of different sizes. Similarly, the same clutch oil cylinder can match clutch cylinder bodies of different sizes. The product size is flexible and diverse, and the production cost is low, which solves the problem that the integral structure requires the investment of molds of different sizes, resulting in excessive costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional schematic diagram of the assembly structure of Example 1 of the present utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the assembly structure of Example 1 of the present utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the clutch cylinder body according to Embodiment 1 of the present invention;

[0018] Figure 4 This is a schematic cross-sectional view of the clutch cylinder of Example 1 of the present utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the assembly structure of Example 2 of the present utility model;

[0020] Figure 6 This is a schematic cross-sectional view of the assembly structure of Example 2 of the present utility model;

[0021] Figure 7 This is a schematic cross-sectional view of the clutch cylinder body according to Embodiment 2 of the present invention;

[0022] Figure 8 It is a schematic cross-sectional view of the clutch cylinder according to embodiment 2 of the present invention.

[0023] Explanation of symbols in the figure:

[0024] 1. Clutch cylinder body; 2. Clutch oil cylinder; 3. Internal spline; 4. Oil hole; 5. Retaining ring groove; 6. Internal stopper; 7. External stopper. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments.

[0026] Example 1

[0027] like Figure 1-4 As shown, a split-welded clutch hub is welded by a clutch cylinder 2 and a clutch cylinder body 1. Specifically, an outer stop 7 is provided on the clutch cylinder 2, and an inner stop 6 is provided on the clutch cylinder body 1. The size of the inner stop 6 is interference fit with the size of the outer stop 7. After the clutch cylinder 2 and the clutch cylinder body 1 are connected, they are fixed radially by high-energy beam welding.

[0028] Since the clutch cylinder body 1 is designed to be connected to the friction pair passive component, a spline connection method is adopted, and internal splines 3 are set on the clutch cylinder body 1. The internal splines 3 are evenly distributed on the inner ring of the clutch cylinder body 1 and are used to connect with the friction pair passive component. In the integral clutch hub, the internal splines need to be provided with a tool-relief groove, and the presence of the tool-relief groove will affect the overall performance of the clutch. Therefore, the internal splines can only be formed by cold extrusion. However, since heat treatment will cause deformation of the workpiece, it cannot be heat treated. The pressure bearing performance of the clutch hub is poor. By welding the clutch cylinder body 1 and the clutch oil cylinder 2 to the clutch hub, the clutch cylinder body 1 and the clutch oil cylinder 2 can be processed separately and then welded. The clutch cylinder body 1 can be heat treated before finishing, thereby improving its pressure bearing capacity and increasing the service life of the clutch.

[0029] The clutch cylinder 1 also features an oil hole 4, a radial through-hole perpendicular to the clutch cylinder 1. It can be either a waisted or round hole, depending on the design. Several teeth on the internal spline 3 are removed at the oil hole 4 to ensure better oil drainage. A retaining ring groove 5 is located at the end of the clutch cylinder 1 for mounting a retaining ring, which helps limit the movement of the friction pair.

[0030] This application adopts a split welding method for the clutch hub, and the clutch cylinder body and clutch oil cylinder are all made of profile processing, which reduces the capital investment in spinning equipment and molds, especially avoids dependence on imported equipment. As a result, the product production is no longer restricted by foreign imports, the cost is lower, the production efficiency of new products is improved, and the research and development of new products is further promoted, with considerable economic and social benefits.

[0031] Example 2

[0032] like Figure 5-8 As shown, compared with Example 1, the difference lies in the structural form of the clutch cylinder 2. By adopting a clutch hub with a split welded structure, the clutch cylinder body and the clutch cylinder can be configured with different sizes and structural forms as needed. The same clutch cylinder body can be configured with clutch cylinders of different sizes and structures. Similarly, the same clutch cylinder can match clutch cylinders of different sizes and structures. The product size and structure are flexible and diverse, and the production cost is low, which solves the problem that the integral structure requires the investment of molds of different sizes, resulting in excessively high costs.

[0033] By adopting a split clutch hub, the clutch cylinder body and the clutch oil cylinder can be configured with different sizes as needed. The same clutch cylinder body can be configured with clutch oil cylinders of different sizes. Similarly, the same clutch oil cylinder can match clutch cylinder bodies of different sizes. The product size is flexible and diverse, and the production cost is low, which solves the problem that the integral structure requires the investment of molds of different sizes, resulting in excessive costs.

[0034] However, the above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, changes in the parameters of the equivalent internal spline, the height of the clutch hub, the type of the oil drain hole, etc., or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A split welded clutch hub, characterized in that: A clutch cylinder and a clutch cylinder body are provided, the clutch cylinder is provided with an external stop, the clutch cylinder body is provided with an internal stop, the external stop and the internal stop are interference fit, and the clutch cylinder and the clutch cylinder body are fixed by welding; the clutch cylinder body is a heat-treated part, the clutch cylinder body is provided with internal splines, the internal splines are evenly distributed in the clutch cylinder body, the clutch cylinder body is provided with oil holes, and the internal splines in the clutch cylinder body corresponding to the oil holes are removed.

2. The split-welded clutch hub according to claim 1, characterized in that: The clutch oil cylinder and the clutch cylinder body are fixed by radial welding using a high-energy beam.

3. The split-welded clutch hub according to claim 1, characterized in that: The oil hole is a radial through hole perpendicular to the clutch cylinder body, and is in the form of a waist hole or a round hole.

4. The split-welded clutch hub according to claim 1, characterized in that: The end of the clutch cylinder body is provided with a retaining ring groove.

5. The split-welded clutch hub according to claim 1, characterized in that: The clutch cylinder body and the clutch oil cylinder are both made of profiles.

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