Double corrugated elastic spacer

Abstract

The utility model relates to a double-wave elastic spacer, comprising a spacer body, at least two elastic parts are arranged on the spacer body, the elastic parts are wave-shaped annular structures protruding outward from the spacer body, and retaining rings are arranged at the upper and lower ends of the spacer body. The elastic parts can make the spacer body produce axial elasticity, so there is no need to select retaining rings of suitable thickness. The spacer body can adapt to retaining rings of different thicknesses, and will not be affected by wear, and always play a squeezing role on the bearing.

Description

Technical Field

[0001] The utility model relates to the field of mechanical accessories, and more specifically, to a double-wave elastic spacer for a drive axle reducer. Background Art

[0002] At present, in the main reducer assembly of medium and heavy-duty drive axles, a large bearing and a small bearing are arranged on the main bevel gear shaft, and a rigid spacer and an adjusting gasket are arranged between the two bearings. The axial force is generated by the rotation of the locking nut on the main bevel gear shaft to press the small bearing, the rigid spacer and the large bearing. The adjusting gaskets are respectively located at both ends of the rigid sleeve.

[0003] However, the rigid spacer needs to be used with a gasket of appropriate thickness during use, and the gasket selection process is difficult and cumbersome. In addition, the rigid spacer is easily worn, resulting in a decrease in the bearing preload torque. This assembly method requires repeated disassembly and assembly, has low assembly efficiency, and the axial force fluctuation of the main reducer is also large.

[0004] Therefore, a novel spacer is needed to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to solve the problem that different rigid spacers need to be used in conjunction with gaskets of different thicknesses, and grinding can lead to a decrease in preload torque.

[0006] According to one aspect of the utility model, a double-corrugated elastic spacer is provided, including a spacer body, on which at least two elastic parts are arranged, and the elastic parts are wave-shaped annular structures protruding outward from the spacer body, and retaining rings are respectively placed at the upper and lower ends of the spacer body.

[0007] Through this solution, the elastic part can make the spacer body produce axial elasticity, so there is no need to select a retaining ring of suitable thickness. The spacer body can adapt to retaining rings of different thicknesses and will not be affected by wear, and always exerts a squeezing effect on the bearing.

[0008] Preferably, the protrusion heights of the elastic portion are inconsistent.

[0009] Preferably, the protrusion of the elastic part located at the bottom is larger than the protrusion of the elastic part located at the top.

[0010] This solution can meet the needs of shaft neck changes.

[0011] Preferably, the spacer body is made of 20# steel pipe, and a plurality of compensation holes are arranged between the two elastic parts.

[0012] Through this solution, the compensation hole can adapt to the rigidity of steel pipes of different specifications. For materials with high rigidity, the size of the compensation hole is increased, and for materials with low rigidity, the size of the compensation hole is reduced.

[0013] Preferably, the compensation hole is rhombus-shaped.

[0014] Through this solution, the rhombus has the characteristic of being easy to deform, so it is more convenient to compensate and adapt to the rigidity of the steel pipe.

[0015] Preferably, the retaining ring is an independent retaining ring, and the diameter of the retaining ring matches the diameters of the upper and lower ends of the spacer body respectively.

[0016] Through this solution, the spacer sleeve body can be abutted against two bearings of different sizes.

[0017] Preferably, the retaining ring is formed by bending two ends of the spacer body.

[0018] Through this solution, the installation process is further simplified, and the installation can be completed without the need to set up a separate retaining ring.

[0019] A technical effect of the utility model is:

[0020] Compared with the rigid spacer, the double-wave elastic spacer has a certain deformation ability. The elastic spacer can eliminate the gap caused by wear and tear, and can always press against the small bearing of the main bevel gear shaft, thereby effectively solving the problem of the decrease of the bearing preload torque caused by wear during the use of the vehicle.

[0021] Moreover, the elastic spacer improves the one-time assembly pass rate of the main reducer assembly, greatly improving production efficiency, while also optimizing product quality and improving product NVH performance.

[0022] By increasing or decreasing the number of diamond holes, and increasing or decreasing the size of the diamond compensation holes, the rigidity of different batches of double corrugated sleeves can be controlled within a reasonable range, reducing the scrap rate of the spacer and reducing costs.

[0023] Using retaining rings before and after the double corrugated elastic spacer makes the bearing inner ring more reliable. The spacer body is a thin-walled part. When used directly, the release area between the spacer and the bearing inner ring is small, and the bearing preload force is unevenly distributed. Through two retaining rings, the elastic force is evenly transmitted, which improves reliability.

[0024] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0026] Figure 1It is a schematic diagram of the installation position of the double-corrugated elastic spacer in one embodiment of the present application;

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the double corrugated elastic spacer.

[0028] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the double corrugated elastic spacer. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0031] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] like Figures 1 to 3 As shown, a double-corrugated elastic spacer in an embodiment of the present application includes a spacer body 100, on which at least two elastic parts 110 are arranged, and the elastic parts 110 are wavy annular structures protruding outward from the spacer body 100, and retaining rings 130 are respectively arranged at the upper and lower ends of the spacer body 100.

[0035] Through this embodiment, the elastic part 110 can make the spacer body 100 produce axial elasticity, so there is no need to select a retaining ring 130 of appropriate thickness. The spacer body 100 can adapt to retaining rings 130 of different thicknesses and will not be affected by wear, and always exerts a squeezing effect on the bearing 200.

[0036] During use, the compression amount increases slowly with the increase of axial force, and the preload adjustment can be completed in one go during the assembly process, thereby improving production efficiency. At the same time, due to the large compressible range, the types of spacers required for different wet drive axles can be reduced.

[0037] In one embodiment of the present application, the protrusion heights of the elastic part 110 are inconsistent, and the protrusion of the elastic part 110 located at the bottom is larger than the protrusion of the elastic part 110 located at the top, so as to meet the needs of the journal change.

[0038] In one embodiment of the present application, the spacer body 100 is made of 20# steel pipe, and is formed by two axial compressions using a mold in a completely normalized state. In order to make the preload force of the bearing 200 within the qualified range, the rigidity of the double-corrugated elastic spacer must be within a certain range, but due to material and manufacturing deviations, it is difficult to keep the rigidity of elastic spacers from different batches consistent. A number of compensation holes 120 are provided between the two elastic parts 110. The compensation holes 120 can adapt to the rigidity of steel pipes of different specifications. For materials with high rigidity, the size of the compensation holes 120 is increased, and for materials with low rigidity, the size of the compensation holes 120 is reduced; or the rigidity of spacers from different batches can be made within the qualified area by increasing or decreasing the number of compensation holes 120.

[0039] In one embodiment of the present application, the compensation hole 120 is in a rhombus shape. The rhombus shape has the characteristic of being easy to deform, so that it is more convenient to compensate and adapt to the rigidity of the steel pipe.

[0040] In one embodiment of the present application, the retaining ring 130 is an independent retaining ring, and the diameter of the retaining ring matches the diameters of the upper and lower ends of the spacer body 100, so that the spacer body 100 can be pressed against two bearings 200 of different sizes.

[0041] In one embodiment of the present application, the retaining ring 130 is formed by bending two ends of the spacer body 100. This further simplifies the installation process, and the installation can be completed without additionally providing a separate retaining ring 130.

[0042] A technical effect of the utility model is:

[0043] Compared with the rigid spacer, the double-wave elastic spacer has a certain deformation ability. The elastic spacer can eliminate the gap caused by wear and tear, and can always press against the small bearing 200 of the main bevel gear shaft, thereby effectively solving the problem of the decrease of the preload torque of the bearing 200 due to wear during the use of the vehicle.

[0044] Moreover, the elastic spacer improves the one-time assembly pass rate of the main reducer assembly, greatly improving production efficiency, while also optimizing product quality and improving product NVH performance.

[0045] By increasing or decreasing the number of diamond holes, and increasing or decreasing the size of the diamond compensation hole 120, the rigidity of different batches of double corrugated sleeves can be controlled within a reasonable range, thereby reducing the scrap rate of the spacer sleeves and reducing the cost.

[0046] The use of retaining rings 130 before and after the double-wave elastic spacer makes the tightening of the inner ring of the bearing 200 more reliable. The spacer body 100 is a thin-walled part. When used directly, the release area with the inner ring of the bearing 200 is small, and the preload force of the bearing 200 is unevenly distributed. Through the two retaining rings 130, the elastic force is evenly transmitted, which improves reliability.

[0047] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A double-corrugated elastic spacer, comprising a spacer body, characterized in that: At least two elastic parts are arranged on the spacer body. The elastic parts are wave-shaped annular structures protruding outward from the spacer body. Snap rings are respectively arranged at the upper and lower ends of the spacer body.

2. The double-corrugated elastic spacer according to claim 1, characterized in that: The protrusion heights of the elastic parts are inconsistent.

3. The double-corrugated elastic spacer according to claim 2, characterized in that: The protrusion of the elastic part located at the bottom is larger than the protrusion of the elastic part located at the top.

4. The double-corrugated elastic spacer according to claim 1, characterized in that: The spacer body is made of 20# steel pipe, and a plurality of compensation holes are arranged between the two elastic parts.

5. The double-corrugated elastic spacer according to claim 4, characterized in that: The compensation hole is rhombus-shaped.

6. The double-corrugated elastic spacer according to claim 1, characterized in that: The retaining ring is an independent retaining ring, and the diameter of the retaining ring matches the diameters of the upper and lower ends of the spacer body respectively.

7. The double-corrugated elastic spacer according to claim 1, characterized in that: The retaining ring is formed by bending two ends of the spacer body.

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