High-strength large-swing-angle dust cover suitable for rear drive shaft

Abstract

The high-strength large-swing-angle dust cover suitable for the rear driving shaft comprises a large-diameter section and a small-diameter section, the small-diameter section is provided with a driving shaft connecting part, and the large-diameter section is provided with a shell connecting part; a transition section is arranged between the large-diameter section and the small-diameter section, a plurality of wave crest structures are arranged on the transition section, a wave trough structure is formed between every two adjacent wave crest structures, each wave crest structure comprises a large-diameter end wave crest face and a small-diameter end wave crest face, a plurality of large-diameter end buffering lines are arranged on the large-diameter end wave crest face close to one side of the large-diameter section, and a plurality of small-diameter end buffering lines are arranged on the small-diameter end wave crest face. A large-diameter end drainage groove is formed between every two adjacent large-diameter end buffering lines. A plurality of small-diameter end buffering lines are arranged on the small-diameter end wave crest face close to one side of the small-diameter end, and a small-diameter end drainage groove is formed between every two adjacent small-diameter end buffering lines. Under the working conditions that the occupied space is effectively reduced, the internal volume is reduced and lubricating grease is saved, cracks and abrasion are not prone to occurring, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of dust covers for rear drive shafts, and in particular relates to a high-strength and large-swing-angle dust cover suitable for use on rear drive shafts. Background Art

[0002] The driving wheel of the vehicle is connected to the driving shaft, and the driving shaft is used to receive the driving force from the engine or the motor. A constant velocity joint is installed between the driving shaft and the driving wheel of the vehicle, so as to stably transmit the driving force from the engine or the motor to the driving wheel of the vehicle without being affected by the change of the driving wheel angle. Since the constant velocity joint of the vehicle with the above structure slides while rotating at high speed, lubricants such as grease are required to meet the lubrication requirements of this part, and a dust cover is provided to prevent contamination and leakage of the lubricant. However, in the prior art, the dust cover is stretched or compressed due to the change of the angle of the driving wheel, which will cause the dust cover to be strained, stress concentrated, deformed, displaced, and friction, causing the dust cover to crack and wear prematurely, especially under the condition of large swing angle and high-intensity use, and the service life is short. Therefore, it is necessary to develop a dust cover that can adapt to large swing angle changes. Summary of the invention

[0003] In view of this, the invention aims to overcome the defects in the prior art and proposes a high-strength and large-swing-angle dust cover suitable for use on a rear drive shaft.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A high-strength, large-swing-angle dust cover suitable for use with a rear drive shaft, comprising a large-diameter section connected to a shell and a small-diameter section connected to a drive shaft, the large-diameter section and the small-diameter section are on the same central axis, a drive shaft connection portion is provided at the small-diameter end, and a shell connection portion is provided at the large-diameter end; a transition section is provided between the large-diameter section and the small-diameter section, a plurality of wave crest structures are provided on the transition section, a trough structure is formed between two adjacent wave crest structures, each wave crest structure comprises a large-diameter end wave crest surface and a small-diameter end wave crest surface, a plurality of large-diameter end buffer lines are provided on the large-diameter end wave crest surface close to the large-diameter section, a large-diameter end drainage groove is formed between two adjacent large-diameter end buffer lines; a plurality of small-diameter end buffer lines are provided on the small-diameter end wave crest surface close to the small-diameter end, a small-diameter end drainage groove is formed between two adjacent small-diameter end buffer lines.

[0006] Furthermore, the trough structure is an arc-shaped groove.

[0007] Furthermore, both side walls of the large-diameter end drainage groove are inclined.

[0008] Furthermore, both side walls of the small-diameter end drainage groove are inclined.

[0009] Furthermore, a shell end fixing groove is provided on the outer surface of the shell connecting portion.

[0010] Furthermore, a drive shaft end fixing groove is provided on the outer surface of the drive shaft connecting portion.

[0011] Furthermore, the outer diameter of each wave crest structure gradually decreases from the large diameter section to the small diameter section.

[0012] Furthermore, the inner wall of the drive shaft connecting portion and the inner wall of the shell connecting portion are both provided with at least one protruding structure.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The invention has a reasonable structural design. By arranging a large-diameter end buffering texture on the wave crest surface of the transition section close to the large-diameter section, arranging a small-diameter end buffering texture on the wave crest surface of the transition section close to the small-diameter section, and arranging a large-diameter end connecting section between the transition section and the large-diameter section, and a small-diameter end connecting section between the transition section and the small-diameter section, the overall structural strength of the dust cover can be effectively improved, while ensuring that the dust cover has good tensile and compression properties, and will not reduce the flexibility of the dust cover when rotating, so that the dust cover has excellent performance in use. Under the application condition of large swing angles, cracks are not likely to appear in the structures of various parts of the dust cover, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of the dust cover created for the present invention;

[0017] Figure 2 A schematic diagram of the present invention is provided in which the dust cover is in a retracted state;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the dust cover created by the present invention;

[0019] Figure 4 A schematic diagram of the present invention when creating a dust cover for installation and application;

[0020] Figure 5 A schematic diagram of the three-dimensional structure of the dust cover when the present invention is installed and applied;

[0021] Figure 6 This is a schematic diagram of an embodiment of the present invention in which an annular protrusion is provided. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] A high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft, such as Figures 1 to 6 As shown, it includes a large diameter section 1 connected to the housing 19 and a small diameter section 2 connected to the drive shaft 20. The large diameter section and the small diameter section are on the same central axis. The small diameter end is provided with a drive shaft connection part 3, and the large diameter end is provided with a housing connection part 4. There is a transition section 5 between the large diameter section and the small diameter section. The transition section is provided with a plurality of wave peak structures 6. A wave valley structure 7 is formed between two adjacent wave peak structures. Preferably, the outer diameter of each wave peak structure gradually decreases from the large diameter section to the small diameter section. This makes the transition section smoothly transition from the large diameter section to the small diameter section, ensuring the overall structural stability of the dust cover.

[0027] Each wave crest structure includes a large diameter end wave crest surface 8 and a small diameter end wave crest surface 9. A plurality of large diameter end buffer lines 10 are arranged on the large diameter end wave crest surface close to the large diameter section, and a large diameter end drainage groove 11 is formed between the adjacent large diameter end buffer lines; a plurality of small diameter end buffer lines 12 are arranged on the small diameter end wave crest surface close to the small diameter section, and a small diameter end drainage groove 13 is formed between the adjacent small diameter end buffer lines. It should be noted that the large diameter end wave crest surface refers to the portion of the wave crest structure from the trough structure to the top of the wave crest facing the large diameter side, and the small diameter end wave crest surface refers to the portion of the wave crest structure from the trough structure to the top of the wave crest facing the small diameter side. When the dust cover is working, the drainage grooves can effectively drain water to avoid water accumulation.

[0028] The trough structure is an arc-shaped groove. Both side walls of the drainage groove at the large diameter end are inclined, and both side walls of the drainage groove at the small diameter end are inclined, so that the drainage groove is approximately a V-shaped groove structure, which has a good effect on avoiding noise. The outer surface of the shell connection part is provided with a shell end fixing groove. The outer surface of the drive shaft connection part is provided with a drive shaft end fixing groove. Preferably, the inner wall of the drive shaft connection part and the inner wall of the shell connection part are both provided with at least one protruding structure 14, and after the drive shaft connection part is mounted on the drive shaft, it can be clamped by a throat clamp 21, and the protruding structure can effectively form a seal with the drive shaft, and after the shell connection part is mounted on the shell, it can be clamped by a throat clamp, and the protruding structure can effectively form a seal with the shell.

[0029] In the invention, each large-diameter end buffer pattern and each small-diameter end buffer pattern not only play a role in guiding water, but also play a role in enhancing structural strength. A small-diameter end connecting section 15 is provided between the small-diameter end wave crest surface close to the small-diameter section and the small-diameter section. The wall thickness of the small-diameter end connecting section gradually decreases from the small-diameter section side to the transition section side, and the length of the small-diameter end connecting section is greater than the length of the small-diameter section. A large-diameter end connecting section 16 is provided between the large-diameter end wave crest surface close to the large-diameter section and the large-diameter section. The wall thickness of the large-diameter end connecting section gradually decreases from the large-diameter section side to the transition section side, and the height of the large-diameter end buffer pattern on the large-diameter end wave crest surface protruding from the surface of the large-diameter end wave crest surface gradually decreases from the large-diameter section side to the transition section side, while the height of the small-diameter end buffer pattern on the small-diameter section wave crest surface protruding from the surface of the small-diameter end wave crest surface is the same.

[0030] Such a structural design allows a larger angle to be formed between the large diameter end buffering pattern and the large diameter section when they are combined, thus avoiding stress concentration between the two, thereby making the large diameter section and the transition section have a higher structural strength, adapting to large swing angle conditions. At the same time, the non-equal height design of the large diameter end buffering pattern makes the transition section "softer" at the position where the large diameter end buffering pattern height is smaller than the position close to the large diameter section connecting section. When used at a large swing angle, the part away from the large diameter section connecting section is allowed to deform first, further protecting the large diameter end connecting section. Correspondingly, the equal height design of the small diameter end buffering pattern and the variable wall thickness structure design of the small diameter end connecting section allow the small diameter end connecting section to be deformed, and the surface of the small diameter end connecting section is in contact with each small diameter end buffering pattern at the same time, thereby making the small diameter section and the transition section have a higher structural strength, adapting to large swing angle conditions.

[0031] In an optional embodiment, a plurality of annular protrusions 17 are provided on each small-diameter end wave crest surface where no small-diameter section buffer pattern is provided, that is, in actual application, when two adjacent wave crest surfaces (large-diameter end wave crest surface and its adjacent small-diameter end wave crest surface) are in contact, a plurality of annular protrusions form a support between the two wave crest surfaces, and a transition section drainage groove is formed between the two adjacent annular protrusions, which plays a role in drainage and also enhances the structural strength of the transition section. While ensuring that the dust cover has good expansion and contraction capabilities, it also extends the service life of the dust cover product. Each annular protrusion is also provided with a connecting groove with the same structure as the water guide groove, and the connecting groove is used to connect the two adjacent transition section drainage grooves. The depth of the connecting groove is 1 / 3-1 / 2 of the height of the annular protrusion where it is located, and the width of the connecting groove is 1 / 50-1 / 30 of the diameter of the annular protrusion where it is located. It will not reduce the flexibility of the dust cover when it rotates, nor will it destroy its balance. The two wave crest surfaces are no longer in surface contact, but the annular protrusion on the wave crest surface at the small diameter end is in contact with the wave crest surface at the large diameter end, forming a "line" contact. While achieving silent performance, the performance of use is also guaranteed. The service life of the dust cover with structural improvement can be extended to a certain extent.

[0032] In an optional embodiment, each large-diameter end buffer pattern and each small-diameter end buffer pattern are provided with a water guide groove 18, and the water guide grooves on each large-diameter end buffer pattern are all staggered, and the water guide grooves on each small-diameter end buffer pattern are also staggered. The depth of the water guide groove is 1 / 3-1 / 2 of the height of the buffer pattern where it is located, and the width of the water guide groove is 1 / 50-1 / 30 of the diameter of the buffer pattern where it is located. In a further improved scheme, the cross-sectional area (i.e., the product of the depth and width of the water guide groove) gradually increases from the water guide groove on the buffer pattern away from the side of the trough structure to the water guide groove on the buffer pattern close to the trough structure, and the cross-sectional area (i.e., the product of the depth and width of the water guide groove) gradually increases from the connecting groove on the annular protrusion away from the side of the trough structure to the connecting groove on the annular protrusion close to the trough structure, so that more accumulated water flows to the trough structure position.

[0033] The above structural design not only ensures that the water guide groove can be used to connect two adjacent drainage grooves, and the connecting groove can be used to connect two adjacent transition section drainage grooves, but also ensures the structural strengthening effect of the buffer pattern. The path of accumulated water in each drainage groove is longer, which is similar to a "maze". At the moment when the dust cover shrinks, the more the accumulated water fills in the corresponding drainage groove or the transition section drainage groove, the more the accumulated water is instantly compressed and forms an effect similar to a "solid structure" in the corresponding groove. That is, the accumulated water accumulated in the groove can also assist in strengthening the transition section. Moreover, since the accumulated water is more filled in the trough structure position, it can avoid excessive deformation of the trough structure and stress concentration and premature damage. Therefore, the prejudice of the prior art is overcome, the disadvantages of accumulated water are transformed into favorable effects, which is more conducive to extending the service life of the dust cover.

[0034] The drainage grooves can drain water well. When there is accumulated water between the contact parts of the two wave crests, the accumulated water can be discharged smoothly along the drainage grooves to the wave valley structure (drainage space) and the outside of the dust cover. The drainage grooves arranged along the axial direction of the dust cover and the patterns arranged along the circumferential direction serve as drainage structures for accumulated water between the contact surfaces. They play a role in drainage in both the horizontal and vertical directions, which can effectively avoid the noise caused by instantaneous drainage between the two (wave crest) contact surfaces, and reduce the vibration of the dust cover, which is beneficial to extend the service life of the dust cover. Since the water guide grooves on each buffer pattern are staggered, the two adjacent drainage grooves are connected through water guide grooves at different positions.

[0035] The invention has a reasonable structural design. By arranging a large-diameter end buffering texture on the wave crest surface of the transition section close to the large-diameter section, arranging a small-diameter end buffering texture on the wave crest surface of the transition section close to the small-diameter section, and arranging a large-diameter end connecting section between the transition section and the large-diameter section, and a small-diameter end connecting section between the transition section and the small-diameter section, the overall structural strength of the dust cover can be effectively improved, while ensuring that the dust cover has good tensile and compression capabilities, and will not reduce the flexibility of the dust cover when rotating, so that the dust cover has excellent performance in use. At the same time, the occupied space is reduced, the internal volume is reduced, and grease is saved. Under the application condition of large swing angles, the structures of various parts of the dust cover are not prone to cracks, and the service life is extended.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft, characterized in that: It includes a large diameter section connected to the shell and a small diameter section connected to the drive shaft, the large diameter section and the small diameter section are on the same central axis, a drive shaft connection portion is provided at the small diameter end, and a shell connection portion is provided at the large diameter end; there is a transition section between the large diameter section and the small diameter section, a plurality of wave peak structures are provided on the transition section, and a trough structure is formed between two adjacent wave peak structures, each wave peak structure includes a large diameter end wave peak surface and a small diameter end wave peak surface, a plurality of large diameter end buffer lines are provided on the large diameter end wave peak surface close to the large diameter section, and a large diameter end drainage groove is formed between two adjacent large diameter end buffer lines; a plurality of small diameter end buffer lines are provided on the small diameter end wave peak surface close to the small diameter end, and a small diameter end drainage groove is formed between two adjacent small diameter end buffer lines.

2. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: The trough structure is an arc-shaped groove.

3. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: Both side walls of the large-diameter end drainage groove are inclined.

4. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: Both side walls of the small-diameter end drainage groove are inclined.

5. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: The outer surface of the shell connecting part is provided with a shell end fixing groove.

6. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: A driving shaft end fixing groove is provided on the outer surface of the driving shaft connecting portion.

7. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: The outer diameter of each wave crest structure gradually decreases from the large diameter section to the small diameter section.

8. The high-strength, large-swing-angle dust cover suitable for use on a rear drive shaft according to claim 1, characterized in that: The inner wall of the drive shaft connecting portion and the inner wall of the shell connecting portion are both provided with at least one protrusion structure.

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