Shaft sleeve shell with limiting structure

Abstract

The utility model relates to the technical field of shell assembly, and discloses a shaft sleeve shell with a limiting structure, which comprises a shell and a shaft sleeve riveted with a shell bottom plate, the shell bottom plate is provided with a shaft sleeve mounting hole, the shaft sleeve comprises a shaft sleeve bottom plate and a shaft sleeve main body, and the shaft sleeve main body is provided with the limiting structure. The limiting structure comprises a containing groove formed in the side face of the shaft sleeve body, a limiting ring is arranged in the containing groove, and a plurality of springs are arranged between the limiting ring and the groove bottom of the containing groove. By arranging the limiting structure, when the spring recovers to the initial state, the limiting ring is partially exposed out of the outer side of the containing groove, and the bottom face of the exposed part of the limiting ring makes contact with the inner surface of the bottom plate of the shell, so that the bottom plate is limited in the thickness direction, the fixing strength of the shell and the shaft sleeve is further enhanced through the limiting ring, and vibration of the shell is eliminated; and the shell is prevented from being broken.

Description

Technical Field

[0001] The utility model belongs to the technical field of housing assembly, and particularly relates to a bushing housing with a limiting structure. Background Art

[0002] The bushing housing is an important component on the engine. The bushing housing and the bushing are usually fixedly connected by rivets. When the engine works for a long time under high power, the combined action of magnetic field torque, axial dynamic balance and the engine's own resonance on the rivets is as follows: the rivets work normally, while the housings on both sides of the rivets vibrate relative to the rivets along the height direction of the housing, and the rivet holes are very close to the fan mounting holes and heat dissipation holes, resulting in easy stress concentration at the rivet holes. Eventually, cracks gradually appear in the housing near the rivet holes. Seriously, the end of the housing breaks along the distribution track of the rivet holes, seriously affecting the normal operation of the engine. Summary of the Invention

[0003] In view of this, the purpose of the utility model is to provide a portable anchoring device to solve the technical problem that the housings on both sides of the rivets vibrate relative to the rivets in the prior art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A bushing housing with a limiting structure, characterized in that it includes a housing and a bushing riveted to the bottom plate of the housing. The bottom plate of the housing is provided with a bushing mounting hole. The bushing includes a bushing bottom plate and a bushing body. A limiting structure is provided on the bushing body. The limiting structure includes a receiving groove opened on the side surface of the bushing body along the circumferential direction. The height of the receiving groove from the bushing bottom plate is the same as the thickness of the bottom plate of the housing. A limiting ring is provided in the receiving groove. The cross-section of the limiting ring is in the shape of a right trapezoid, with the inclined surface of the limiting ring facing outwards. The upper and lower end surfaces of the limiting ring are slidably connected to the groove walls of the receiving groove. A plurality of springs are arranged along the circumferential direction between the limiting ring and the bottom of the receiving groove. Under the action of an external force, the springs are compressed and the limiting ring can completely enter the receiving groove. When the springs rebound to the initial state, a part of the limiting ring is still located in the receiving groove. A rubber layer is bonded at the relative position of the side wall of the bushing body and the side wall of the bushing mounting hole;

[0006] Further, the diameter of the bushing bottom plate is larger than the inner diameter of the bushing mounting hole;

[0007] Further, the receiving groove is integrally annular and the cross-section of the receiving groove is rectangular;

[0008] Further, rivet holes are provided on both the bottom plate of the housing and the bushing bottom plate, and the positions and sizes of the rivet holes on the above two are adapted to each other. A rivet is provided in the rivet hole;

[0009] Further, the width of the rubber layer is the same as the height of the bushing mounting hole.

[0010] The beneficial effects of the present utility model are as follows:

[0011] (1) Compared with the prior art, by setting a limiting structure, the housing continuously moves downward until the bottom surface of the housing is in full contact with the upper surface of the bushing bottom plate. At this time, the limiting ring is no longer stressed, the spring rebounds and drives the limiting ring to move outward. When the spring returns to its initial state, part of the limiting ring protrudes outside the receiving groove, and the bottom surface of the protruding part of the limiting ring contacts the inner surface of the housing bottom plate, thereby limiting the housing in the thickness direction. The fixing strength between the housing and the bushing is further enhanced by the limiting ring, the vibration of the housing is eliminated, and the housing is prevented from cracking;

[0012] (2) By setting a rubber layer, on the one hand, the gap between the side wall of the bushing mounting hole and the side wall of the bushing body can be eliminated, thereby restricting the vibration of the housing relative to the bushing. On the other hand, the external force received by the bushing can be evenly transmitted to the housing through the rubber layer, avoiding excessive local stress and improving the stability and service life of the bushing and the housing. Description of the Drawings

[0013] In order to make the objectives, technical solutions and beneficial effects of the present utility model clearer, the following drawings are provided for description of the present utility model:

[0014] Figure 1 Schematic diagram of the structure of the housing and the bushing in Embodiment 1 of the present utility model;

[0015] Figure 2 For Figure 1 Cross-sectional view;

[0016] Figure 3 For Figure 2 Enlarged view at A1 in

[0017] Figure 4 Schematic diagram of the limiting ring in Embodiment 1 of the present utility model.

[0018] The reference signs in the drawings are as follows:

[0019] Housing 1, heat dissipation holes 11, fan mounting holes 12, bushing mounting holes 13, bushing 2, bushing bottom plate 21, bushing body 22, receiving groove 23, limiting ring 24, spring 25, rivet holes 3, rivets 4. Detailed Description of the Preferred Embodiments

[0020] Embodiment 1 is specifically as Figures 1-4 shown.

[0021] A bushing housing with a limiting structure, comprising a cylindrical housing 1 and a bushing 2 riveted to the bottom plate of the housing. A plurality of heat dissipation holes 11 and fan mounting holes 12 are evenly spaced along the circumferential direction on the bottom plate of the housing 1, wherein the heat dissipation holes 11 and the fan mounting holes 12 are adjacent and spaced from each other.

[0022] A circular bushing mounting hole 13 is provided at the center position of the bottom plate of the housing 1. The bushing 2 includes a circular bushing bottom plate 21 and a bushing main body 22 connected to the bushing bottom plate 21. The diameter of the bushing bottom plate 21 is greater than the inner diameter of the bushing mounting hole 13. The bushing main body 22 enters the internal space of the housing 1 along the bushing mounting hole 13. The bushing bottom plate 21 is in contact with the bottom plate of the housing 1, and the side surface of the bushing main body 22 is in contact with the inner wall of the bushing mounting hole 13. Rivet holes 3 are provided on both the bottom plate of the housing 1 and the bushing bottom plate 21, and the positions and sizes of the rivet holes 3 on the above two are adapted to each other. A rivet 3 is provided in the rivet hole 3, and the riveting is achieved through the rivet 3, thereby completing the fixed installation of the housing 1 and the bushing 2.

[0023] However, long-term operation under high power conditions will cause the housing 1 on both sides of the rivet 4 to vibrate violently relative to the rivet 4. Seriously, cracks or even fractures will appear along the distribution trajectory of the rivet holes 3 on the bottom plate of the housing 1 near the rivet holes 3.

[0024] Based on this, in this embodiment, a limiting structure is provided on the bushing main body 22, such as Figure 2 、 Figure 3 shown. The limiting structure includes a receiving groove 23 opened on the side surface of the bushing main body 22 along the circumferential direction. The receiving groove 23 is integrally annular and the cross-section of the receiving groove 23 is rectangular. The height of the receiving groove 23 from the bushing bottom plate 21 is the same as the thickness of the bottom plate of the housing 1.

[0025] A limiting ring 24 is provided in the receiving groove 23. In this embodiment, the cross-section of the limiting ring 24 is in the shape of a right trapezoid, and the inclined surface of the limiting ring 24 faces outward. The upper and lower end surfaces of the limiting ring 24 are slidably connected to the groove walls of the receiving groove 23. The depth of the receiving groove 23 is greater than the bottom width of the limiting ring 24. A plurality of horizontally extending springs 25 are evenly spaced along the circumferential direction between the limiting ring 24 and the bottom of the receiving groove 23. One end of the spring 25 is welded to the bottom of the receiving groove 23, and the other end of the spring 25 is welded to the inner vertical surface of the limiting ring 24. The limiting ring 24 and the receiving groove 23 are elastically connected through the spring 25. It should be emphasized that in this embodiment, under the action of an external force, the spring 25 compresses, and the limiting ring 24 can completely enter the receiving groove 23, and when the spring 25 rebounds to the initial state, a part of the limiting ring 24 is still located in the receiving groove 23.

[0026] In use, align the bushing mounting hole 13 on the bottom plate of the housing 1 with the bushing body 22, and sleeved the housing 1 from top to bottom around the periphery of the bushing body 22. During this process, the bushing mounting hole 13 contacts the inclined surface of the limiting ring 24, and under the action of the downward pressure, the spring 25 contracts, and the limiting ring 24 displaces into the receiving groove 23 until the limiting ring 24 completely enters the receiving groove 23. The housing 1 continues to move downward until the bottom surface of the housing 1 is in full contact with the upper surface of the bushing bottom plate 21. At this time, the limiting ring 24 is no longer stressed, the spring 25 rebounds and drives the limiting ring 24 to move outward. When the spring 25 returns to its initial state, a part of the limiting ring 24 protrudes outside the receiving groove 23, and the bottom surface of the protruding part of the limiting ring 24 contacts the inner surface of the bottom plate of the housing 1, so as to limit the bottom plate 1 in the thickness direction, and further enhance the fixing strength between the housing 1 and the bushing 2 through the limiting ring 24, thereby eliminating the vibration of the housing 1 and avoiding the housing 1 from cracking.

[0027] In addition, due to the inevitable errors in the processing process, there will be a gap between the side wall of the bushing mounting hole 13 and the side wall of the bushing body 22. Therefore, a rubber layer (not shown in the figure) is adhesively bonded at the relative position between the side wall of the bushing body 22 and the side wall of the bushing mounting hole 13, and the width of the rubber layer is the same as the height of the bushing mounting hole 13. By providing the rubber layer, on the one hand, the gap between the side wall of the bushing mounting hole 13 and the side wall of the bushing body 22 can be eliminated, thereby restricting the vibration of the housing 1 relative to the bushing 2. On the other hand, the external force received by the bushing 2 can be evenly transmitted to the housing 1 through the rubber layer, avoiding excessive local stress and improving the stability and service life of the bushing 2 and the housing 1.

[0028] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A shaft sleeve housing with a limiting structure, characterized in that: It includes a shell and a sleeve riveted to the shell bottom plate, a sleeve mounting hole is opened on the shell bottom plate, the sleeve includes a sleeve bottom plate and a sleeve body, a limiting structure is provided on the sleeve body, the limiting structure includes a receiving groove opened on the side of the sleeve body along the circumferential direction, the height of the receiving groove from the sleeve bottom plate is consistent with the thickness of the shell bottom plate, a limiting ring is provided in the receiving groove, the cross-section of the limiting ring is a right-angle trapezoidal shape, the inclined surface of the limiting ring faces outward, the upper and lower end surfaces of the limiting ring are slidably connected to the groove wall of the receiving groove, and a plurality of springs are arranged between the limiting ring and the groove bottom of the receiving groove along the circumferential direction. Under the action of external force, the spring is compressed, and the limiting ring can completely enter the receiving groove. When the spring rebounds to the initial state, the limiting ring part is still located in the receiving groove, and a rubber layer is glued at the relative position between the side wall of the sleeve body and the side wall of the sleeve mounting hole.

2. The shaft sleeve housing with a limiting structure according to claim 1, characterized in that: The diameter of the shaft sleeve base plate is larger than the inner diameter of the shaft sleeve mounting hole.

3. The shaft sleeve housing with a limiting structure according to claim 2, characterized in that: The receiving groove is annular as a whole and has a rectangular cross section.

4. The shaft sleeve housing with a limiting structure according to claim 3, characterized in that: Rivet holes are provided on the bottom plate of the shell and the bottom plate of the shaft sleeve, and the positions and sizes of the rivet holes on the two are matched, and rivets are provided in the rivet holes.

5. The shaft sleeve housing with a limiting structure according to claim 4, characterized in that: The width of the rubber layer is consistent with the height of the bushing mounting hole.

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