Wave spring for bearing pre-tightening and wave washer thereof

Abstract

The utility model discloses a wave spring for pre-tightening a bearing, which comprises a top gasket, the bottom of the top gasket is fixedly connected with a wave spring elastic sheet mechanism, the bottom of the wave spring elastic sheet mechanism is fixedly connected with a bottom gasket, the top of the top gasket is provided with a plurality of groups of slots, and inserting shafts are arranged right below the slots. The wave spring with four waves has small working stress, the fatigue life of the wave spring is prolonged, the problem of fatigue fracture of the wave spring in a severe application scene is avoided, the ring width of the wave washer is set to be of a narrow ring structure, the ring width of the wave washer is smaller than that of the wave spring under the technical condition of JB / T 7590-2005, and the service life of the wave spring is prolonged. Therefore, the wave crest of the wave washer can be in large-area contact with the bearing outer ring, and after the wave washer is pressed by axial force, the wave crest of the wave washer is still in large-area contact with the end face of the bearing outer ring, so that the contact stress is reduced, the problem that the contact part is greatly abraded is solved, and meanwhile, the service life of the bearing is also prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to spring technical field especially, it is a kind of wave spring and its wave washer for bearing pre-tightening. BACKGROUND

[0002] Wave spring is a kind of common elastic element, usually by the wave spring ring alternately consisting of wave crest and wave trough, due to its special shape and material, wave spring has many unique characteristics and applications.

[0003] The wave spring under the existing JB / T 7590-2005 technical conditions can meet the general application demand of motor bearing pre-tightening, but with the increasingly wide application of motor, some new application environment is more severe than before, such as new energy automobile drive motor generally has the characteristics of large power, high speed, large vibration, long service life, so that the wave spring under the JB / T 7590-2005 technical conditions has large working stress, in the application scene of frequent vibration and large amplitude, part of the wave spring under the JB / T 7590-2005 technical conditions is prone to fatigue fracture problem, and the wave spring under the JB / T 7590-2005 technical conditions is inclined when being pressed in axial direction, the contact area of wave crest of wave spring and bearing outer ring end surface is very small, and then local wear problem of large area appears, the wear of wave crest will damage the fatigue life of wave spring, and the dust generated by wear enters the bearing groove of high-speed rotation, which reduces the service life of bearing. SUMMARY

[0004] The purpose of this section is to outline some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention to avoid obscuring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] To solve the above problems, the utility model adopts the following technical scheme.

[0006] A wave washer, comprising a wave washer, the ring width of the wave washer is arranged as a narrow ring structure, the number of waves of the wave washer is arranged as four, and the wave shape is sinusoidal, the four-wave wave washer has small working stress, and the material thickness of the wave washer is 0.7mm.

[0007] Further description of the above technical scheme:

[0008] The utility model provides a kind of wave spring for bearing pre-tightening, including top washer and wave spring spring piece mechanism, the wave spring spring piece mechanism is made of four groups of wave washer and is stacked with each other, the bottom of the top washer is fixedly connected with the top of wave spring spring piece mechanism, the bottom of the wave spring spring piece mechanism is fixedly connected with bottom washer, the top of the top washer is equipped with multiple groups of insertion slot, the bottom of the bottom washer is fixedly connected with multiple groups of insertion shaft, the insertion shaft is all arranged directly below insertion slot, the inner wall of the top washer and bottom washer is all fixedly connected with rubber ring.

[0009] As further description of the above technical solution:

[0010] The top end of the inner wall of the insertion slot is all fixedly connected with slide, and the insertion slot and the slide are all provided with six groups, and the top surface of the slide and the top surface of the top washer are arranged on the same horizontal plane;An arc-shaped sliding groove is formed in the slide, which can be used for connecting the insertion shaft.

[0011] As further description of the above technical solution:

[0012] The bottom of the slide is all bonded with rubber sheet, and the rubber sheet is provided with six groups and the top surface size is less than the bottom surface size of the slide;When the size of the rubber sheet is less than the size of the slide, enough space is left for the deformation of the rubber sheet.

[0013] As further description of the above technical solution:

[0014] The bottom center of the insertion shaft is all bonded with rubber washer, and the insertion shaft and the rubber washer are all provided with six groups, and the bottom surface size of the insertion shaft is greater than the top surface size of the rubber washer, and the insertion shaft is made of stainless steel material;The insertion shaft is made of stainless steel material, which can not only improve the stability of the two groups of wave spring splicing structures, but also improve the service life of the whole wave spring.

[0015] As further description of the above technical solution:

[0016] The inner wall of the rubber ring is all equipped with multiple groups of grooves, and the rubber ring is provided with two groups and the thickness is same with the thickness of the top washer and the bottom washer;When the rubber ring is sleeved on different models of bearing, the inner wall will change to different degrees.

[0017] As further description of the above technical solution:

[0018] The outer wall of the top washer and the bottom washer is all fixedly connected with multiple groups of limiting indicating sheet, and the limiting indicating sheet is provided with twelve groups, and the protruding part of the limiting indicating sheet is arranged in arc shape;The protruding part of the limiting indicating sheet is arranged in arc shape, which can prevent the finger from being scratched.

[0019] As further description of the above technical solution:

[0020] The top gasket is the same in size as the bottom gasket, and the depth of the slot is less than the thickness of the top gasket; the top gasket and the bottom gasket are arranged, so that the stability of the entire wave spring is improved.

[0021] Compared with the prior art, the utility model has the advantages of:

[0022] (1) The four-wave wave spring has a small working stress, which is beneficial to improve the fatigue life of the wave spring, thereby avoiding the problem of fatigue fracture of the wave spring in a harsh application scenario, and the ring width of the wave gasket is arranged as a narrow ring structure, and the ring width of the wave gasket is less than the ring width of the wave spring under the technical conditions of JB / T 7590-2005, which enables the wave peak of the wave gasket to realize large-area contact with the bearing outer ring, and when the wave gasket is pressed under the axial force, the wave peak still realizes large-area contact with the bearing outer ring end face, thereby reducing the contact stress and avoiding the problem of large wear of the contact part, and the service life of the bearing is also improved.

[0023] (2) When the rubber ring is sleeved on the bearing, due to the existence of the inner wall groove, the groove can better adapt to the shape of the bearing when the rubber ring is subjected to pressure, so that the inner wall of the rubber ring can be more closely attached to the bearing, thereby improving the performance of the wave spring, and through the connection of the shaft and the slide piece structure, the mutual stacking of multiple wave springs can be realized, which not only improves the stability of the stacked structure of the multiple wave springs, but also plays a role in adjusting the total length of the wave spring, which is beneficial to improve the working efficiency of the entire wave spring.

[0024] (3) By arranging the limiting indicating piece, the shaft and the arc-shaped sliding groove structure of the slide piece can be quickly aligned, thereby speeding up the mutual splicing speed of the multiple wave springs, and in the process of sliding of the shaft, the rubber gasket and the rubber sheet are subjected to extrusion and deformation, which to some extent, enhances their adhesion and friction, and after the moving process of the shaft is completed, the bottom surface of the rubber gasket is tightly attached to the inner wall bottom end of the slot, because after the rubber gasket is subjected to extrusion and deformation, a tight contact surface is formed on the surface of the rubber gasket, so that the shaft can stably stay in the slot and will not easily slide, and at the same time, the bottom end of the rubber sheet is also tightly attached to the top surface of the disc structure of the shaft, because the rubber sheet is also subjected to extrusion and deformation in the process of sliding of the shaft, so that a tight contact surface is formed on the bottom surface of the rubber sheet, so that the rubber sheet can effectively prevent the shaft from sliding in the slide piece. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A three-dimensional drawing of the wave spring for bearing pre-tightening is provided for the utility model;

[0026] Figure 2A top view of the wave spring for bearing pre-tightening is provided in the utility model.

[0027] Figure 3 A bottom view of the wave spring for bearing pre-tightening is provided in the utility model.

[0028] Figure 4 A bottom view of the sliding sheet in the wave spring for bearing pre-tightening is provided in the utility model.

[0029] Figure 5 A wave spring for bearing pre-tightening is provided in the utility model Figure 3 A local enlarged view of A area in the wave spring for bearing pre-tightening is provided in the utility model.

[0030] Figure 6 A local enlarged view of B area in the wave spring for bearing pre-tightening is provided in the utility model. Figure 3

[0031] Figure 7 A three-dimensional view of the wave washer is provided in the utility model.

[0032] Figure 8 An application scenario diagram of the first embodiment is provided in the utility model.

[0033] The correspondence between the annotations of the various figures in the drawings and the component names is as follows:

[0034] 1, top gasket; 2, wave spring leaf spring mechanism; 21, wave washer; 3, bottom gasket; 4, insertion slot; 5, sliding sheet; 6, rubber sheet; 7, insertion shaft; 8, rubber gasket; 9, rubber ring; 10, groove; 11, limit indicating sheet. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, comprehensible and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings in the specification.

[0036] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0037] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the utility model. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments. The utility model provides the following embodiments. ​

[0038] Referring to Figure 7 and Figure 8 As shown in the first embodiment of the utility model provides: a wave gasket, wave gasket 21, wave gasket 21 ring width is provided with narrow ring structure, wave gasket 21 ring width is less than JB / T 7590-2005 technical conditions under the ring width of wave spring, wave gasket 21 wave number is all set to four and wave form is sine wave, four waves wave gasket 21 has smaller working stress, wave gasket 21 thickness is set to 0.7mm, wave gasket 21 cross-sectional dimension is less than the cross-sectional dimension of wave spring under JB / T 7590-2005 technical conditions, wave gasket 21 wave crest and the end surface of bearing contact, and the axial pre-tightening force is applied to the outer edge of bearing top surface, wave gasket 21 wave crest and the outer edge of bearing top can be contacted with larger area, wave gasket 21 is pressed under axial force, and its wave crest still contacts with larger area with the top surface of bearing, thereby reducing the contact stress, and further avoiding the problem that the contact part wears greatly. The wave spring defined in JB / T 7590-2005 used for the bearing of different outer diameter and the wave spring defined in the utility model are as shown in the following table:

[0039]

[0040] Referring to Figure 1 As shown in the second embodiment of the utility model provides: a bearing pre-tightening wave spring, including top pad 1, top pad 1 bottom fixedly connected with wave spring leaf mechanism 2, wave spring leaf mechanism 2 is formed by four groups of wave gasket 21 mutually stacking, wave spring leaf mechanism 2 is a kind of elastic component with excellent performance, it is mainly composed of four groups of wave spring sheet with same size, in these four groups of spring sheet, the size and shape of each group are strictly consistent, to ensure that in the process of stress, leaf can evenly disperse load, to achieve stable and durable working performance, in wave spring leaf mechanism 2, leaf adopts special corrugated shape design, this design makes leaf can better produce elastic deformation when subjected to external force, while it is also helpful to improve the fatigue resistance of leaf, so that it can maintain stable elastic performance even if subjected to repeated loading and unloading in long time use, four groups of wave spring sheet cooperate with each other in structure, form a stable leaf matrix, when not subjected to external force, these leaves are closely arranged together, maintain original shape and size, once subjected to external force, these leaves will be elastically deformed according to the direction and size of external force, so that wave spring leaf mechanism 2 can effectively bear and disperse load, wave spring leaf mechanism 2 bottom fixedly connected with bottom pad 3, the shape and size of top pad 1 are same with the shape and size of bottom pad 3, top pad 1 is arranged directly above bottom pad 3.

[0041] Referring to Figure 2 , Figure 3 , Figure 4 and Figure 5 , the top pad 1 is provided with a plurality of groups of slots 4 at the top, the inside of the slot 4 is provided in an arc shape, the inner wall of the slot 4 is fixedly connected with a sliding piece 5 at the top end, the top surface of the sliding piece 5 is provided on the same horizontal plane as the top surface of the top pad 1, an arc-shaped sliding groove is formed in the sliding piece 5, and a rubber piece 6 is bonded to the bottom of the sliding piece 5, the size of the rubber piece 6 is smaller than the size of the sliding piece 5, and sufficient space is left for the deformation of the rubber piece 6, a plurality of groups of plug shafts 7 are fixedly connected to the bottom of the bottom pad 3, the plug shaft 7 is a special mechanical component, which is composed of a disc and a cylinder, the cylinder is vertically installed at the center of the top surface of the disc, such a design enables the plug shaft 7 to smoothly move in the arc-shaped sliding groove inside the sliding piece 5, in operation, the plug shaft 7 is first inserted into the slot 4 from one end of the arc-shaped sliding groove inside the sliding piece 5, then as the plug shaft 7 moves, the cylindrical structure on the plug shaft 7 will slide along the arc-shaped sliding groove to the other end, in this process, the plug shaft 7 can stably move in the arc-shaped sliding groove of the sliding piece 5, ensuring the stability and reliability of the mechanical component, and a rubber pad 8 is bonded to the center of the bottom of the plug shaft 7.

[0042] Referring to Figure 2 , Figure 3 , Figure 4 and Figure 5 , in the process of sliding of the plug shaft 7, the rubber pad 8 and the rubber piece 6 will be deformed by being extruded, which to some extent, enhances their adhesion and friction, after the plug shaft 7 completes the moving process, the bottom surface of the rubber pad 8 will be tightly attached to the inner wall bottom end of the slot 4, because after being extruded and deformed, the surface of the rubber pad 8 will form a tight contact surface, so that the plug shaft 7 can stably stay in the slot 4 and will not easily slide, at the same time, one end of the bottom surface of the rubber piece 6 will also be tightly attached to the top surface of the disc structure on the plug shaft 7, because the rubber piece 6 is also extruded and deformed in the process of sliding of the plug shaft 7, so that the bottom surface forms a tight contact surface, in this way, the rubber piece 6 can effectively prevent the plug shaft 7 from sliding in the sliding piece 5, in this process, the deformation of the rubber pad 8 and the rubber piece 6, and the tight attachment between them and the plug shaft 7 and the slot 4, ensure the stability of the plug shaft 7 in the sliding piece 5, which is of great significance to the smoothness and durability of the entire sliding process of the plug shaft 7, so that the plug shaft 7 can stably work in the sliding piece 5 for a long time without wear or looseness due to sliding, through the connection of the plug shaft 7 and the sliding piece 5 structure, the mutual stacking of multiple groups of wave springs can be achieved, not only improving the stability of the stacked structure of multiple groups of wave springs, but also playing a role in adjusting the total length of the wave springs.

[0043] Referring to Figure 2 andFigure 6 As shown, the inner wall of the top gasket 1 and the bottom gasket 3 is fixedly connected with a rubber ring 9, a plurality of grooves 10 are formed in the inner wall of the rubber ring 9, when the rubber ring 9 is sleeved on bearings of different models, the inner wall will change to different degrees, the rubber ring 9 can not only relieve the pressure between the bearings, but also absorb vibration and impact, in the use process, due to the difference of bearing models, the rubber ring 9 will bear different pressure, so that it will deform, when the rubber ring 9 is sleeved on the bearing, due to the existence of the inner wall groove 10, the rubber ring 9 can better adapt to the shape of the bearing when it is under pressure, in this way, the inner wall of the rubber ring 9 can be more closely attached to the bearing, improving the performance of the wave spring, at the same time, the tearing effect of the groove 10 can also increase the friction of the rubber ring 9, so that it is more stable when bearing pressure, so that the service life of the wave spring under various working conditions is greatly improved, the outer wall of the top gasket 1 and the bottom gasket 3 is fixedly connected with a plurality of limiting indicating pieces 11, by setting the limiting indicating piece 11, it is helpful to quickly align the plug shaft 7 with the arc-shaped sliding groove structure in the sliding piece 5, so as to speed up the mutual splicing speed of the plurality of wave springs.

[0044] The above is a further detailed description of the utility model in combination with the specific embodiments, which cannot be considered as limiting the specific embodiments of the utility model to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope determined by the claims of the utility model.

Claims

1. A wave washer comprising a wave washer (21), characterized by: The ring width of the wave-shaped gasket (21) is arranged as a narrow ring structure, the wave number of the wave-shaped gasket (21) is arranged as four, and the wave shape is a sine wave, and the thickness of the wave-shaped gasket (21) is arranged as 0.7 mm.

2. A wave spring for bearing preloading, comprising a top washer (1) and a wave spring spring mechanism (2), characterized in that: The wave-shaped spring leaf mechanism (2) is composed of four groups of wave-shaped gaskets (21) stacked with each other, the top gasket (1) is fixedly connected with the top of the wave-shaped spring leaf mechanism (2), the bottom of the wave-shaped spring leaf mechanism (2) is fixedly connected with the bottom gasket (3), a plurality of insertion slots (4) are arranged on the top of the top gasket (1), a plurality of insertion shafts (7) are fixedly connected with the bottom of the bottom gasket (3), the insertion shafts (7) are arranged directly below the insertion slots (4), and the inner walls of the top gasket (1) and the bottom gasket (3) are fixedly connected with rubber rings (9).

3. The wave spring for bearing preloading according to claim 2, wherein: The inner walls of the insertion slots (4) are fixedly connected with sliding plates (5), and the insertion slots (4) and the sliding plates (5) are provided with six groups.

4. The wave spring for bearing preloading according to claim 3, wherein: The bottom of the sliding plate (5) is bonded with a rubber sheet (6), and the rubber sheet (6) is provided with six groups and has a top surface smaller than the bottom surface of the sliding plate (5).

5. The wave spring for bearing preloading according to claim 2, wherein: The bottom center of the insertion shaft (7) is bonded with a rubber gasket (8), and the insertion shaft (7) and the rubber gasket (8) are provided with six groups, the bottom surface of the insertion shaft (7) is larger than the top surface of the rubber gasket (8), and the insertion shaft (7) is made of stainless steel.

6. The wave spring for bearing preloading according to claim 2, wherein: The inner walls of the rubber rings (9) are provided with a plurality of grooves (10), and the rubber rings (9) are provided with two groups and have the same thickness as the top gasket (1) and the bottom gasket (3).

7. The wave spring for bearing preloading according to claim 2, wherein: The outer walls of the top gasket (1) and the bottom gasket (3) are fixedly connected with a plurality of limiting indicating pieces (11), the limiting indicating pieces (11) are provided with twelve groups, and the protruding portions of the limiting indicating pieces (11) are arranged in an arc shape.

8. The wave spring for bearing preloading according to claim 2, wherein: The size of the top gasket (1) is the same as the size of the bottom gasket (3), and the depth of the insertion slot (4) is smaller than the thickness of the top gasket (1).

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