Motor rear end cover assembling structure

Abstract

The utility model provides a motor rear end cover assembling structure, which comprises a casing, a rear end cover and an end cover support, a first end face is formed at the rear end of the casing, a boss is arranged in the middle of the first end face, the edge of the first end face extends outwards to form a mounting part, the boss is provided with a second end face parallel to the first end face, and the mounting part is provided with a first positioning hole; the rear end cover comprises a plate body part and a matching part, a part of the edge of the plate body part extends outwards to form a crimping part, and the crimping part is provided with a second positioning hole; and the end cover bracket comprises a mounting block and a bracket, the mounting block is arranged between the mounting part and the crimping part, the mounting block is provided with a third positioning hole, and the first positioning hole, the second positioning hole and the third positioning hole correspond to each other in position in the axial direction. According to the utility model, the mounting block of the end cover bracket is arranged between the mounting part and the crimping part, and the mounting block is crimped and fixed on the casing by using the rear end cover, so that the mounting stability is strong, the use number of connecting pieces is reduced, the production cost is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an assembly structure of a rear end cover of a motor. Background Art

[0002] The end cover is a cover installed at the rear end of the motor casing. On the one hand, the end cover can constitute a part of the motor casing structure to protect the working components inside, and on the other hand, it can also provide an installation site for some external structures of the motor.

[0003] Usually, the end cover includes a cover plate connected to the motor housing and forming a packaging structure, and a bracket connected to the cover plate. For example, the patent document with the publication number CN211930395U discloses a new type of motor end cover, which includes an end cover and an end cover bracket. The end cover is provided with a first connection hole and a heat dissipation hole. The end cover bracket includes a first frame plate connected to the end cover and a second frame plate arranged on the side of the first frame plate away from the end cover. The first frame plate is provided with a second connection hole, and the second connection hole is provided with a boss extending in the direction of the first connection hole. The connection part of the second frame plate and the first frame plate is provided with a reinforcing rib, and the side of the first connection hole away from the end cover bracket is provided with a pin extending in the direction of the second connection hole. In the above technical scheme, the first frame plate cover in a circular ring structure is arranged on the outside of the end cover, and is connected to the end cover through a plurality of connection holes to achieve a stable connection between the end cover bracket and the end cover. Although this scheme can improve the connection stability, the plurality of connection holes cooperate with the cover plate at the same time. On the one hand, the installation takes a long time, and on the other hand, the processing accuracy requirements for the end cover and the end cover bracket are relatively high. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a motor rear end cover assembly structure, in which the end cover bracket has strong installation stability and is relatively time-saving to install.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A motor rear end cover assembly structure comprises a casing, a rear end cover and an end cover bracket, the rear end of the casing is formed with a first end face, the middle portion of the first end face is provided with a boss of an annular structure, the edge of the first end face extends outward to form a mounting portion, the boss has a second end face parallel to the first end face, an axial groove is formed in the middle of the boss, and the mounting portion is provided with a first positioning hole; the rear end cover comprises a plate body portion overlapped with the second end face and a matching portion extending into the axial groove, a part of the edge of the plate body portion extends outward to form a crimping portion, the crimping portion is provided with a second positioning hole, and the crimping portion has a crimping surface opposite to the first end face; the end cover bracket comprises a mounting block and a bracket connected to the mounting block, the mounting block has a lower base surface matched with the first end face and an upper base surface matched with the crimping surface, and a third positioning hole is provided on the mounting block; the first positioning hole, the second positioning hole and the third positioning hole correspond in axial position.

[0007] The utility model sets the mounting block of the end cover bracket between the first end face of the casing and the crimping surface of the rear end cover, uses the crimping surface to crimp and fix the mounting block to the rear end of the casing, and uses a connecting piece that passes through the first positioning hole, the second positioning hole and the third positioning hole to fix the casing, the mounting block and the rear end cover to achieve the installation of the end cover bracket. Since the rear end cover forms a connecting structure with the casing during the motor assembly process, the installation stability of the end cover bracket is greatly improved under the action of the crimping part, and the number of connection holes and the number of connecting pieces used are reduced at the same time. On the one hand, the production cost of the motor is reduced and the assembly efficiency of the motor is improved, and on the other hand, the processing accuracy requirements are reduced.

[0008] Furthermore, a portion of the edge of the plate body extends outward to form an external connection portion, and the external connection portion is provided with a first external connection hole; and the mounting block is provided with a second external connection hole corresponding to the first external connection hole.

[0009] Further, a portion of the edge of the second end surface extends outward to form a locking base, and the locking base is provided with a first locking hole; a portion of the edge of the plate body extends outward to form a locking fitting portion, and the locking fitting portion is provided with a second locking hole corresponding to the first locking hole.

[0010] Furthermore, a protruding positioning block is provided on the first end surface, and a positioning slot corresponding to the positioning block is provided on the lower base surface of the mounting block.

[0011] Furthermore, the mounting block is provided with an arc-shaped mating surface capable of mating with the outer side surface of the boss.

[0012] Furthermore, a radially penetrating notch is formed on the side wall of the boss, and the mounting block is provided with a clamping portion protruding relative to the arc-shaped matching surface and capable of matching with the notch.

[0013] Furthermore, the protruding end face of the clamping part and the inner side face of the boss form a natural transition. The natural transition here means that the protruding end face of the clamping part is an arc-shaped structure, and the circumferential radius corresponding to the protruding end face is consistent with the circumferential radius corresponding to the inner side face of the boss.

[0014] Furthermore, the locking base is formed on a side away from the end cover bracket.

[0015] Furthermore, a portion of the upper base surface extends outward relative to the crimping surface, and the bracket is vertically connected to the upper base surface.

[0016] Furthermore, a reinforcing rib is provided at a portion where the bracket is connected to the upper base surface.

[0017] In summary, the application of the utility model can achieve the following beneficial effects:

[0018] 1. The utility model sets the mounting block of the end cover bracket between the first end surface of the casing and the crimping surface of the rear end cover, and uses the rear end cover to crimp and fix the mounting block on the casing. Compared with the existing technical solution of directly connecting the end cover bracket on the outside of the rear end cover, the installation stability of the utility model is stronger.

[0019] 2. The utility model reduces the number of positioning holes that need to be formed between the rear end cover and the end cover bracket, which reduces the use of connectors, reduces production costs, and improves assembly efficiency, and reduces processing accuracy requirements.

[0020] 3. In some embodiments of the present invention, the position of the mounting block of the end cover bracket is limited by a matching structure formed by the positioning block and the positioning slot or a matching structure formed by the notch and the snap-on portion, thereby facilitating alignment between the first positioning hole and the third positioning hole and improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the motor rear cover assembly structure in the embodiment;

[0022] Figure 2 is a schematic diagram of the structure of the casing;

[0023] Figure 3 is a schematic diagram of the structure of the rear end cover;

[0024] Figure 4 is a structural schematic diagram of the end cover bracket;

[0025] Figure 5 It is a schematic diagram of the matching structure between the casing and the end cover bracket;

[0026] In the figure, 1-housing, 11-first end face, 111-mounting portion, 112-first positioning hole, 113-positioning block, 12-boss, 121-second end face, 122-axial groove, 123-notch portion, 124-locking base, 125-first locking hole, 2-rear end cover, 21-plate body, 211-crimping portion, 2111-crimping surface, 2111-crimping surface, 212-second positioning hole, 213-first external hole, 214-locking matching portion, 215-second locking hole, 22-matching portion, 3-end cover bracket, 31-mounting block, 311-lower base surface, 312-upper base surface, 313-third positioning hole, 314-second external hole, 315-positioning slot, 316-arc-shaped matching surface, 317-clamping portion, 32-bracket, 321-reinforcing rib. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0028] like Figure 1 As shown, this embodiment provides a motor rear cover assembly structure, which includes a housing 1, a rear end cover 2 and an end cover bracket 3;

[0029] Combination Figure 2 The rear end of the housing 1 forms a first end face 11, a boss 12 of an annular structure is provided in the middle of the first end face 11, a portion of the edge of the first end face 11 extends outward to form two mounting portions 111, a first positioning hole 112 is provided in the middle of the mounting portion 111, the boss 12 has a second end face 12 parallel to the first end face 11, and an axial groove 122 is formed in the middle of the boss;

[0030] Combination Figure 3 The rear end cover 2 includes a plate body portion 21 corresponding to the shape of the second end face 12 and overlapping with it, and a matching portion 22 extending into the axial groove 122, a portion of the edge of the plate body portion 21 extends outward to form a crimping portion 211, the crimping portion is provided with a second positioning hole 212 and a first external connection hole 213, and a crimping surface 2111 opposite to the first end face 11 is formed on the lower side of the crimping portion;

[0031] Combination Figure 4The end cover bracket 3 includes a mounting block 31 and a bracket 32. The lower side of the mounting block forms a lower base surface 311 that matches the first end surface 11, and the upper side forms an upper base surface 312 that matches the crimping surface 2111. The side close to the boss 12 forms an arc-shaped matching surface 316 that matches the outer side surface of the boss 12. The bracket 32 ​​is vertically connected to the upper base surface 312 and extends in the direction close to the side of the plate body 21. A reinforcing rib 321 is provided at the junction of the bracket and the upper base surface. A third positioning hole 313 and a second external hole 314 are provided on the mounting block; the first positioning hole 112, the second positioning hole 212 and the third positioning hole 313 are in the same position in the axial direction for the connection piece to pass through; the first external hole 213 and the second external hole 314 are in the same position in the axial direction to provide a mounting site for the external structure;

[0032] The installation method of this embodiment is as follows: first prepare the casing 1, and place the mounting block 31 of the end cover bracket 3 on the first end face 11, so that the arc-shaped mating surface 316 fits with the outer side surface of the boss 12, and the first positioning hole 112 and the third positioning hole 313 are aligned. Then, place the rear end cover 2 on the boss, so that the plate body overlaps the second end face 12, the mating part is embedded in the axial groove 122, and the second positioning hole 212 is aligned with the third positioning hole 313. Finally, use screws passing through the first positioning hole, the second positioning hole and the third positioning hole to fix the casing, the end cover bracket and the end cover. The number of screws used in the installation of this embodiment is small, and the installation is convenient.

[0033] Since the alignment between the first positioning hole, the second positioning hole and the third positioning hole is involved, the utility model can also add a limiting mechanism to prevent the mounting block from sliding on the first end face to facilitate alignment and installation. For example, in one embodiment, a raised positioning block 113 is provided on the first end face, and a corresponding positioning slot 315 is provided on the lower base surface of the mounting block. When the mounting block is placed on the first end face, the positioning block and the positioning slot cooperate to prevent the mounting block from sliding. In another embodiment, a radially through-going notch portion 123 is formed on the side wall of the boss, and a raised snap-fit ​​portion 317 corresponding to the notch portion is provided on the arc-shaped mating surface 316 of the mounting block. When the arc-shaped mating surface cooperates with the outer side surface of the boss, the snap-fit ​​portion 317 is snapped into the notch portion 123 to limit the sliding of the mounting block on the first end face.

[0034] In order to further enhance the connection stability between the rear end cover and the casing, in some embodiments, the second base surface extends outward from one side edge away from the end cover bracket to form a locking base 124, and the locking base is provided with a first locking hole 125. The plate body extends outward from one side edge away from the end cover bracket to form a locking fitting portion 214, and the locking fitting portion is provided with a second locking hole 215. The first locking hole and the second locking hole are aligned so that the connecting piece can pass through.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor rear end cover assembly structure, characterized in that: The invention comprises a casing, a rear end cover and an end cover bracket, wherein a first end face is formed at the rear end of the casing, a boss with an annular structure is provided in the middle of the first end face, an edge of the first end face extends outward to form a mounting portion, the boss has a second end face parallel to the first end face, an axial groove is formed in the middle of the boss, and the mounting portion is provided with a first positioning hole; the rear end cover comprises a plate body portion overlapped with the second end face and a matching portion extending into the axial groove, a part of the edge of the plate body portion extends outward to form a crimping portion, the crimping portion is provided with a second positioning hole, and the crimping portion has a crimping surface opposite to the first end face; the end cover bracket comprises a mounting block and a bracket connected to the mounting block, the mounting block has a lower base surface matched with the first end face and an upper base surface matched with the crimping surface, and a third positioning hole is provided on the mounting block; the first positioning hole, the second positioning hole and the third positioning hole correspond in position in the axial direction.

2. The motor rear end cover assembly structure according to claim 1, characterized in that: A portion of the edge of the plate body extends outward to form an external connection portion, and the external connection portion is provided with a first external connection hole; and the mounting block is provided with a second external connection hole corresponding to the first external connection hole.

3. The motor rear end cover assembly structure according to claim 1, characterized in that: A portion of the edge of the second end surface extends outward to form a locking base, and the locking base is provided with a first locking hole; a portion of the edge of the plate body extends outward to form a locking fitting portion, and the locking fitting portion is provided with a second locking hole corresponding to the first locking hole.

4. The motor rear end cover assembly structure according to claim 1, characterized in that: A protruding positioning block is arranged on the first end surface, and a positioning slot corresponding to the positioning block is arranged on the lower base surface of the mounting block.

5. The motor rear end cover assembly structure according to claim 1, characterized in that: The mounting block is provided with an arc-shaped matching surface which can match with the outer side surface of the boss.

6. The motor rear end cover assembly structure according to claim 5, characterized in that: A radially penetrating notch is formed on the side wall of the boss, and the mounting block is provided with a clamping portion protruding relative to the arc-shaped matching surface and capable of matching with the notch.

7. The motor rear end cover assembly structure according to claim 6, characterized in that: The protruding end surface of the clamping portion and the inner side surface of the boss are naturally transitioned.

8. The motor rear end cover assembly structure according to claim 3, characterized in that: The locking base is formed at a side away from the end cover bracket.

9. The motor rear end cover assembly structure according to claim 1, characterized in that: A portion of the upper base surface extends outward relative to the crimping surface, and the bracket is vertically connected to the upper base surface.

10. The motor rear end cover assembly structure according to claim 9, characterized in that: A reinforcing rib is also provided at the position where the bracket is connected to the upper base surface.

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