Shell steel jacket mounting structure

Abstract

The utility model provides a shell steel jacket installation structure, which comprises a shell and a steel jacket body matched with a shaft hole of the shell, the shaft hole comprises a bearing end used for installing a bearing and a press-fitting end used for press-fitting the steel jacket body, and a limiting structure is arranged on the end face of the press-fitting end. The steel sleeve body is provided with a stop part matched with the limiting structure, and when the steel sleeve body is pressed into the shaft hole, the stop part is located in the limiting structure so that circumferential limiting of the shell to the steel sleeve body can be achieved. According to the utility model, the steel jacket body and the shell are in split connection design in a press fit manner, and the steel jacket body can be independently designed, such as the design processes of finish machining, plating layer addition and the like, so that the applicability and the use performance of the steel jacket body are improved; and the limiting structure is arranged on the press-fitting end face of the shaft hole of the shell, and the blocking part is correspondingly arranged on the steel sleeve body, so that circumferential limiting of the shell on the steel sleeve body is achieved, and the using firmness of the steel sleeve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shell steel sleeve assembly, in particular to a shell steel sleeve installation structure. Background Art

[0002] In order to improve the stability of water-cooled motor bearings at high speed and high temperature, a steel sleeve structure is usually added to the motor housing bearing seat. When the motor temperature rises, the thermal expansion coefficient of the steel sleeve is smaller than that of aluminum alloy, which can effectively reduce the gap between the bearing outer ring and the bearing seat and improve the wear resistance of the bearing seat due to bearing creep.

[0003] At present, the method of adding a steel sleeve structure to the bearing seat of the motor housing is usually to pre-cast the steel sleeve directly on the motor housing. The pre-cast steel sleeve in this method is relatively thick and heavy, and has low applicability. When the pre-cast steel sleeve rusts and affects the performance of the motor, it cannot be replaced in time, which leads to the scrapping of the entire housing and high maintenance costs. At the same time, since the hardness of the steel sleeve is too high during the casting of the housing, annealing will occur, the hardness of the pre-cast steel sleeve cannot be improved, and the steel sleeve cannot be super-finished after pre-casting, and its performance is low. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a housing steel sleeve installation structure, aiming to solve the technical problems of the existing method of directly pre-casting the steel sleeve on the motor housing, that the pre-cast steel sleeve is relatively thick, has low applicability and low performance.

[0005] The utility model provides a shell steel sleeve installation structure, comprising a shell and a steel sleeve body adapted to an axial hole of the shell, the axial hole comprising a bearing end for installing a bearing and a press-fitting end for press-fitting the steel sleeve body, a limiting structure is provided on the end surface of the press-fitting end, and a blocking portion adapted to the limiting structure is provided on the steel sleeve body. When the steel sleeve body is press-fitted into the axial hole, the blocking portion is located inside the limiting structure to achieve circumferential limiting of the steel sleeve body by the shell.

[0006] Compared with the prior art, the beneficial effects of the shell steel sleeve installation structure of the utility model are: the axial hole of the shell provided by the utility model is provided with a press-fitting end for press-fitting the steel sleeve body, and the steel sleeve body and the shell are designed with a split connection for press-fitting. The steel sleeve body can be replaced when it is rusted, avoiding the problem of the entire shell being scrapped due to rust of the precast steel sleeve when the steel sleeve is directly precast on the shell, thereby greatly reducing the maintenance cost; further, the overall structure of the steel sleeve body is light, simple, and easy to process, and its applicability is greatly improved; at the same time, the steel sleeve body of the utility model can be designed separately, such as performing fine processing and adding plating and other design processes, which can improve the hardness of the steel sleeve and improve the performance of the steel sleeve body. In addition, the utility model provides a limiting structure on the end face of the press-fitting end of the shell shaft hole, and correspondingly provides a blocking portion on the steel sleeve body. When the steel sleeve body is press-fitted into the press-fitting end of the shell shaft hole, the blocking portion on the steel sleeve body is clamped inside the limiting structure, thereby realizing circumferential limiting of the steel sleeve body by the shell, thereby avoiding circumferential creep or even axial movement of the steel sleeve body on the shell after being heated, thereby greatly improving the reliability of the steel sleeve body.

[0007] In addition, the housing steel sleeve installation structure according to the utility model may also have the following additional technical features:

[0008] Optionally, the limiting structure includes two limiting parts extending outward from the end face of the press-fit end along the axial direction of the axial hole, and a limiting groove is formed between the two limiting parts. When the steel sleeve body is press-fitted into the axial hole, the blocking part is located inside the limiting groove.

[0009] Optionally, the slot depth of the limiting slot is greater than the height of the blocking portion along the axial direction of the steel sleeve body, and the slot width of the limiting slot is greater than the length of the blocking portion along the circumferential direction of the steel sleeve body.

[0010] Optionally, a concave surface is respectively provided on one opposite side of the two limiting portions to reduce a contact area between the limiting portions and the blocking portions when the limiting portions abut against the blocking portions.

[0011] Optionally, the steel sleeve body includes a steel ring portion adapted to the press-fit end, a first pressing ring portion extending from one end of the steel ring portion toward the inner side of the steel ring portion, and a second pressing ring portion extending from the other end of the steel ring portion toward the outer side of the steel ring portion, and the blocking portion is extended outwardly from the outer edge of the second pressing ring portion.

[0012] Optionally, the outer diameter of the steel ring portion is consistent with the inner diameter of the press-fit end.

[0013] Optionally, a height of the blocking portion along the axial direction of the steel ring portion is consistent with a ring thickness of the second pressure ring portion.

[0014] Optionally, the sum of the width of the blocking portion along the radial direction of the steel ring portion and the ring width of the second pressing ring portion is smaller than the end face width of the press-fit end of the axial hole.

[0015] Optionally, edges of the blocking portion on a side away from the second pressure ring portion are all rounded edges.

[0016] Optionally, when the steel sleeve body is pressed into the axial hole, the second pressing ring portion and the blocking portion are both in contact with the end face of the press-fitting end on the side close to the first pressing ring portion, and a gap space is provided between the outer edge of the second pressing ring portion and the limiting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural explosion diagram of the housing steel sleeve installation structure of the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the steel sleeve body of the housing steel sleeve installation structure of the utility model when it is pressed into the shaft hole;

[0020] Figure 4 It is a structural schematic diagram of the steel sleeve body of the housing steel sleeve installation structure of the utility model when it is pressed into the shaft hole at a certain viewing angle;

[0021] Figure 5 It is a schematic cross-sectional structure diagram of the steel sleeve body of the housing steel sleeve installation structure of the utility model when it is pressed into the shaft hole;

[0022] Figure 6 The utility model is a schematic diagram of a use state of the shell steel sleeve installation structure.

[0023] Among them, the above-mentioned drawings include the following figure marks: 1-steel sleeve body; 11-blocking part; 12-second pressure ring part; 13-steel ring part; 14-first pressure ring part; 2-housing; 21-axial hole; 211-bearing end; 212-pressing end; 22-limiting structure; 221-limiting part; 222-limiting groove; 223-recessed surface; 3-bearing; 4-reducer input oil seal; 5-reducer input shaft.

[0024] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] See also Figures 1 to 6 The housing steel sleeve installation structure of the utility model comprises a housing 2 and a steel sleeve body 1 adapted to the shaft hole 21 of the housing 2, wherein Figure 1 and Figure 5 As shown, the housing 2 is provided with an axial hole 21, which includes a bearing end 211 for mounting the bearing 3 and a press-fit end 212 for press-fitting the steel sleeve body 2, so that the steel sleeve body 1 and the housing 2 are fixedly connected by press-fitting.

[0029] In order to prevent the axial movement that may be caused by the circumferential creep of the steel sleeve body 2 at the axial hole 21 of the shell 2 after being heated, the shell steel sleeve installation structure of the utility model is provided with a limiting mechanism 22 on the end face of the press-fitting end 211 of the axial hole 21, and a corresponding adaptive blocking portion 11 is provided on the steel sleeve body 1, so that when the steel sleeve body 1 is pressed into the axial hole 21 of the shell 2, the blocking portion 11 is located inside the limiting mechanism 22. In other words, the locking fit between the limiting mechanism 22 and the blocking portion 11 is utilized to realize the circumferential movement of the steel sleeve body 1 when the circumferential creep occurs at the axial hole 21, so as to achieve the purpose of circumferential limitation of the steel sleeve body 1 by the shell 2.

[0030] In this embodiment, if Figure 3As shown, the limiting mechanism 22 on the housing 2 includes two limiting portions 221 extending outwardly from the end surface of the press-fitting end 212 along the axial direction of the shaft hole 21, and a limiting groove 222 is formed between the two limiting portions 221. Specifically, the two limiting portions 221 are both located on the same side of the end surface of the press-fitting end 212 to form a limiting groove 222 that can limit the blocking portion 11 on the steel sleeve body 1. When the steel sleeve body 1 is press-fitted into the shaft hole 21, the blocking portion 11 is located inside the limiting groove 222. The length of the limiting portion 221 along the radial direction of the shaft hole 21 is less than the width of the end surface of the press-fitting end 212 of the shaft hole 21.

[0031] Furthermore, in order to meet the assembly tolerance between the limiting mechanism 22 and the blocking portion 11 when the steel sleeve body 1 and the shell 2 are press-fitted, when the blocking portion 11 is located inside the limiting groove 222, a small gap space should be provided between the blocking portion 11 and the two side walls of the limiting groove 222, so that the blocking portion 11 can move in a small range in the limiting groove 222. Therefore, in this embodiment, the notch depth of the limiting groove 222 is greater than the height of the blocking portion 11 along the axial direction of the steel sleeve body 1, and the notch width of the limiting groove 222 is greater than the length of the blocking portion 11 along the circumferential direction of the steel sleeve body 1.

[0032] Furthermore, in the present embodiment, the two limiting portions 221 are respectively provided with recessed surfaces 223 on opposite sides, so that the slot width of the limiting groove 222 near the slot bottom is larger than the slot width of the limiting groove 222 near the slot entrance. In this way, when the blocking portion 11 located inside the limiting groove 222 starts to move circumferentially due to the circumferential creep of the steel sleeve body 1, the recessed surface on the limiting portion 221 can abut against the blocking portion 11 in time to limit the circumferential movement of the blocking portion 11. At the same time, the contact area between the limiting portion 221 and the blocking portion 11 is greatly reduced to avoid surface adhesion caused by long-term abutment between the limiting portion 221 and the blocking portion 11.

[0033] The shell steel sleeve installation structure of the utility model adopts a separate press-fitting method for the steel sleeve body. In other words, the steel sleeve body in the utility model can be manufactured and designed separately, and can be fine-machined and coated to avoid the shell being scrapped due to rust problems. In addition, the separate steel sleeve body can also adopt a stamping structure, which is convenient to process, the overall weight of the steel sleeve body can be greatly reduced, and the applicability of the steel sleeve body is significantly improved.

[0034] In this embodiment, if Figures 2 to 4As shown, the steel sleeve body 1 includes a steel ring portion 13 adapted to the axial hole 21 of the shell 2, a first pressing ring portion 14 extending from one end of the steel ring portion 13 toward the inner side of the steel ring portion 13, and a second pressing ring portion 12 extending from the other end of the steel ring portion 13 toward the outer side of the steel ring portion 13. A blocking portion 11 extends outward from the outer edge of the second pressing ring portion 12, and the edges of the blocking portion 11 on the side away from the second pressing ring portion 12 are all rounded edges.

[0035] In order to realize the press-fitting of the steel sleeve body 1 and the shell 2, the outer diameter of the steel ring portion 13 in the steel sleeve body 1 is consistent with the inner diameter of the press-fitting end 212 on the shaft hole 21. More specifically, in this embodiment, the height of the blocking portion 11 along the axial direction of the steel ring portion 13 is consistent with the ring thickness of the second pressing ring portion 12; the sum of the width of the blocking portion 11 along the radial direction of the steel ring portion 13 and the ring width of the second pressing ring portion 12 is less than the end face width of the press-fitting end 212 of the shaft hole 21. When the steel sleeve body 1 is press-fitted into the shaft hole 21, the second pressing ring portion 12 and the blocking portion 11 are both in contact with the end face of the press-fitting end 212 on the side close to the first pressing ring portion 14, and a gap space is provided between the outer edge of the second pressing ring portion 12 and the limiting portion 221.

[0036] It should be noted that the limiting structure 22 provided on the shell 2 and the corresponding blocking portion 11 provided on the steel sleeve body 1 in the present invention are not limited to the shape, quantity and structural design described in the above embodiments, and can also be other structural designs that can achieve the purpose of circumferential limiting of the shell on the steel sleeve body through the locking cooperation of the limiting structure and the blocking portion in the present invention.

[0037] In actual operation, the specific use process of the housing steel sleeve installation structure of the utility model can be: first, the housing 2, the bearing 3, the reducer input shaft 5 and the reducer input oil seal 4 are assembled together, specifically, as follows Figure 6 As shown, the bearing end 211 of the shaft hole 21 of the housing 2 is connected to the reducer input shaft 5 through the bearing 3, and the reducer input oil seal 4 is installed at one end of the reducer input shaft 5 located in the shaft hole 21. Then, the steel sleeve body 1 is pressed. Specifically, after the blocking portion 11 on the steel sleeve body 1 is aligned with the limiting groove 222 formed on the limiting structure 22 on the housing 2, the steel sleeve body 1 is pressed into the press-fitting end 212 of the shaft hole 21 to achieve the circumferential limitation of the steel sleeve body 1 by the housing 2, so as to avoid the axial movement of the steel sleeve after the housing is heated and the circumferential creeping occurs.

[0038] In summary, the shell steel sleeve installation structure of the utility model is provided with a press-fitting end for press-fitting the steel sleeve body in the axial hole of the shell, and the steel sleeve body and the shell are designed with a split connection for press-fitting. The steel sleeve body can be replaced when it is rusted, avoiding the problem of the entire shell being scrapped due to rust of the pre-cast steel sleeve when the steel sleeve is directly pre-cast on the shell, thereby greatly reducing the maintenance cost; further, the overall structure of the steel sleeve body is light, simple, and easy to process, and its applicability is greatly improved; at the same time, the steel sleeve body of the utility model can be individually designed, such as performing fine processing and adding plating and other design processes, which can improve the hardness of the steel sleeve and improve the performance of the steel sleeve body. In addition, the utility model provides a limiting structure on the end face of the press-fitting end of the shell shaft hole, and correspondingly provides a blocking portion on the steel sleeve body. When the steel sleeve body is press-fitted into the press-fitting end of the shell shaft hole, the blocking portion on the steel sleeve body is clamped inside the limiting structure, thereby realizing circumferential limiting of the steel sleeve body by the shell, thereby avoiding circumferential creep or even axial movement of the steel sleeve body on the shell after being heated, thereby greatly improving the reliability of the steel sleeve body.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A housing steel sleeve installation structure, comprising a housing and a steel sleeve body adapted to an axial hole of the housing, characterized in that: The axial hole includes a bearing end for installing a bearing and a press-fitting end for press-fitting the steel sleeve body. A limiting structure is provided on the end face of the press-fitting end. A blocking portion adapted to the limiting structure is provided on the steel sleeve body. When the steel sleeve body is press-fitted into the axial hole, the blocking portion is located inside the limiting structure to achieve circumferential limitation of the steel sleeve body by the shell.

2. The housing steel sleeve installation structure according to claim 1, characterized in that: The limiting structure comprises two limiting parts extending outwardly from the end surface of the press-fitting end along the axial direction of the shaft hole, and a limiting groove is formed between the two limiting parts.

3. The housing steel sleeve installation structure according to claim 2 is characterized in that: The slot depth of the limiting slot is greater than the height of the blocking portion along the axial direction of the steel sleeve body, and the slot width of the limiting slot is greater than the length of the blocking portion along the circumferential direction of the steel sleeve body.

4. The housing steel sleeve installation structure according to claim 2, characterized in that: The two limiting parts are respectively provided with a concave surface on one side opposite to the other, so as to reduce the contact area between the limiting part and the blocking part when the limiting part abuts against the blocking part.

5. The housing steel sleeve installation structure according to claim 2, characterized in that: The steel sleeve body includes a steel ring portion adapted to the press-fit end, a first pressing ring portion extending from one end of the steel ring portion toward the inner side of the steel ring portion, and a second pressing ring portion extending from the other end of the steel ring portion toward the outer side of the steel ring portion, and the blocking portion is extended outwardly from the outer edge of the second pressing ring portion.

6. The housing steel sleeve installation structure according to claim 5, characterized in that: The outer diameter of the steel ring portion is consistent with the inner diameter of the press-fit end.

7. The housing steel sleeve installation structure according to claim 5, characterized in that: The height of the blocking portion along the axial direction of the steel ring portion is consistent with the ring thickness of the second pressure ring portion.

8. The housing steel jacket installation structure according to claim 5, characterized in that: The sum of the width of the blocking portion along the radial direction of the steel ring portion and the ring width of the second pressing ring portion is smaller than the end surface width of the press-fit end of the axial hole.

9. The housing steel sleeve installation structure according to claim 5, characterized in that: The edges of the blocking portion at a side away from the second pressing ring portion are all rounded edges.

10. The housing steel jacket installation structure according to claim 5, characterized in that: When the steel sleeve body is pressed into the axial hole, the second pressing ring part and the blocking part are both in contact with the end surface of the pressing end on the side close to the first pressing ring part, and a gap space is provided between the outer edge of the second pressing ring part and the limiting part.

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