End cover fixing structure and motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to an end cover fixing structure and a motor. The end cover fixing structure comprises an end cover and a shell, a plurality of protruding parts facing the inner side of the shell are arranged at the end of the shell. The outer wall of the end cover is provided with a plurality of grooves recessed in the radial direction, and each groove comprises a fixing face facing the outer side of the shell in the axial direction. The protruding part is used for being contained in the groove and abuts against the fixing face. In other words, according to the end cover fixing structure, the groove in the end cover and the protruding part at the end of the shell are matched and connected in a clamped mode, the structures of other devices in the shell cannot be affected, and therefore optimization of the internal structure of the motor cannot be interfered.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to an end cover fixing structure and a motor. Background Art

[0002] See also Figure 1 In the existing iron shell motor, the housing and the end covers on both sides are generally fixed together by using screws to fix the front cover, iron shell (stator assembly) and rear cover into one piece.

[0003] However, in some scenarios where motor performance is to be optimized (e.g., improving power density, optimizing electromagnetic performance, increasing torque and speed, reducing motor temperature rise, etc.), it is necessary to enlarge the inner diameter of the stator while keeping the outer diameter unchanged. Figure 2 Increasing the inner diameter of the stator will result in an increase in the outer diameter of the coil. If the above fixing method is still used and the yoke of the stator punch is close to the screw hole, the safe creepage distance between the coil and the screw will be insufficient, resulting in short circuits, breakdown and other faults.

[0004] Therefore, it is necessary to improve the fixing method of the motor housing and the end cover. Utility Model Content

[0005] The purpose of the utility model is to provide an end cover fixing structure and a motor to solve the above technical problems.

[0006] The present application provides an end cap fixing structure. The end cap fixing structure comprises: an end cap and a housing;

[0007] The end of the shell is provided with a plurality of protrusions facing the inner side of the shell;

[0008] The outer wall of the end cover is provided with a plurality of radially recessed grooves, and the grooves include a fixing surface axially facing the outer side of the shell;

[0009] The protrusion is used to be accommodated in the groove and pressed against the fixing surface.

[0010] In one embodiment of the present application, the end cover includes a large diameter section and a small diameter section along the axial direction;

[0011] A step surface is formed at the connection between the large diameter section and the small diameter section;

[0012] The small diameter section is used to be inserted into the end of the shell, and the end surface of the shell is pressed tightly against the step surface.

[0013] In one embodiment of the present application, the groove is formed by being axially recessed from the outer end surface of the end cover;

[0014] The axial depth of the groove is greater than the length of the large diameter section and less than the overall length of the end cover.

[0015] In one embodiment of the present application, a through hole is provided on at least one side of the protrusion along the axial direction of the housing.

[0016] In one embodiment of the present application, along the axial direction of the shell, one side of the protrusion is a side surface of the end portion of the shell, and the other side is a side surface of the through hole.

[0017] In one embodiment of the present application, the protrusion is a strip-shaped portion bent into the groove.

[0018] Accordingly, the present application provides a motor, comprising:

[0019] a housing, wherein a stator and a rotor are disposed;

[0020] The two end covers are fixed to the two ends of the shell respectively using the end cover fixing structure described above.

[0021] In one embodiment of the present application, a motor bracket mounting block is provided on the outer end surface of the end cover.

[0022] The beneficial effects of the utility model are:

[0023] Different from the prior art, the present application provides an end cap fixing structure. This end cap fixing structure includes an end cap and a housing; the end of the housing is provided with a plurality of raised portions facing the interior of the housing; the outer wall of the end cap is provided with a plurality of radially recessed grooves, and the grooves include a fixing surface axially facing the exterior of the housing; the raised portions are intended to be received within the grooves and abut against the fixing surface. In other words, the end cap fixing structure of the present application is connected by a snap-fit ​​connection between the grooves on the end cap and the raised portions at the end of the housing, which does not affect the structure of the remaining components within the housing and therefore does not interfere with the optimization of the internal structure of the motor.

[0024] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is the end cover and housing installation structure of the existing motor;

[0028] Figure 2 is a schematic diagram of the stator assembly;

[0029] Figure 3 It is a schematic diagram of the motor of the present utility model;

[0030] Figure 4 yes Figure 3 Middle partial enlarged view;

[0031] Figure 5 This is a partial enlarged view of the end cover

[0032] Figure 6 It is a partial enlarged view of the shell end;

[0033] Figure 7 It is a partial side view of the end cap;

[0034] Figure 8 It is a schematic diagram of the assembly of the end cover and the shell;

[0035] Figure 9 This is a cross-sectional view of the motor.

[0036] In the picture:

[0037] End cover 1, large diameter section 101, small diameter section 102, step surface 103, groove 11, fixing surface 111, housing 2, raised portion 21, through hole 22, strip portion 23, stator 3, rotor 4, motor bracket mounting block 5. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] The present application provides an end cap fixing structure and a motor, which are described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments of the present application. In addition, in the following embodiments, the description of each embodiment has its own emphasis. For parts not detailed in a particular embodiment, please refer to the relevant description of other embodiments.

[0040] See also Figure 3 and Figure 9In one embodiment, the motor includes: a housing 2, in which a stator 3 and a rotor 4 are arranged; and two end covers 1, which are fixed to both ends of the housing 2 using an end cover fixing structure.

[0041] For details, see Figures 3 to 6 In one embodiment, the end cover fixing structure includes: an end cover 1 and a shell 2; the end of the shell 2 is provided with a plurality of protrusions 21 facing the inner side of the shell 2; the outer wall of the end cover 1 is provided with a plurality of radially recessed grooves 11, and the grooves 11 include a fixing surface 111 axially facing the outer side of the shell 2; the protrusions 21 are used to be accommodated in the grooves 11 and pressed against the fixing surface 111.

[0042] In this embodiment, the groove 11 on the end cover 1 and the protrusion 21 at the end of the housing 2 are engaged and connected, which will not affect the structure of other components inside the housing 2 and thus will not interfere with the optimization of the internal structure of the motor.

[0043] For further information, see Figure 7 The end cover 1 includes a large diameter section 101 and a small diameter section 102 along the axial direction; a step surface 103 is formed at the connection between the large diameter section 101 and the small diameter section 102; the small diameter section 102 is used to be inserted into the end of the shell 2, and the end face of the shell 2 is pressed against the step surface 103.

[0044] In this embodiment, due to the different outer diameters of the large diameter section 101 and the small diameter section 102 , a step surface 103 is formed at the junction, which can limit the depth of the end cover 1 inserted into the end of the shell 2 .

[0045] As a forming method of the groove 11 , the groove 11 is formed by being axially recessed from the outer end surface of the end cover 1 ; the axial depth of the groove 11 is greater than the length of the large diameter section 101 and less than the overall length of the end cover 1 .

[0046] In this embodiment, the end face of the shell 2 is pressed against the step surface 103, and the end of the protrusion 21 is pressed against the fixing surface 111, that is, the step surface 103 and the fixing surface 111 cooperate to clamp part of the shell 2 to achieve fastening.

[0047] Optionally, a motor bracket mounting block 5 is provided on the outer end surface of the end cover 1 and can be used to assemble the motor bracket.

[0048] In this embodiment, optionally, a through hole 22 is provided on at least one side of the protrusion 21 along the axial direction of the housing 2 .

[0049] In this embodiment, to facilitate the formation of the raised portion 21, two spaced apart through-holes 22 are bored in the housing 2, with the remaining portion between the through-holes 22 forming a strip-shaped portion 23, which is then bent inward to form the raised portion 21. Of course, to save processing costs, a through-hole 22 can be opened a certain distance inward from the end side of the housing 2, with the remaining portion between the through-hole 22 and the end side of the housing 2 forming the strip-shaped portion 23, which is then bent inward to form the raised portion 21.

[0050] In this embodiment, during assembly, the small-diameter section 102 of the end cover 1 can be first inserted into the end of the shell 2 in the axial direction; the end cover 1 or the shell 2 can be rotated to align each strip portion 23 with the corresponding groove 11; then the strip portion 23 is bent inward to form a protrusion 21, and the assembly of the end cover and the shell 2 is completed, which is simple and efficient.

[0051] In this embodiment, the small-diameter section 102 may be interference-fitted with the end portion of the housing 2 .

[0052] In this embodiment, since the strip portion 23 is bent inwardly along the radial direction to form the protrusion 21, the protrusion 21 will retreat only when subjected to radial force. Therefore, it can withstand a large axial force without deformation and can well fix the end cover 1 and the shell 2.

[0053] In summary, the end cover fixing structure and motor of the present invention remove the screws and nuts, and use the plug-in and clip-on connection between the end cover and the housing, so the end cover and the housing are no longer fixed by screws and nuts, which solves various faults caused by creepage distance, reduces product costs, saves time and labor, and improves product production efficiency.

[0054] It should be noted that the various devices selected in this application (components whose specific structures are not specified) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0055] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An end cover fixing structure, characterized in that: include: End cover (1) and housing (2); The end of the shell (2) is provided with a plurality of protrusions (21) facing the inner side of the shell (2); A plurality of radially recessed grooves (11) are provided on the outer wall of the end cover (1), and the grooves (11) include a fixing surface (111) axially facing the outside of the housing (2); The protrusion (21) is used to be accommodated in the groove (11) and pressed against the fixing surface (111).

2. The end cover fixing structure according to claim 1, characterized in that: The end cover (1) comprises a large diameter section (101) and a small diameter section (102) along the axial direction; A step surface (103) is formed at the connection between the large diameter section (101) and the small diameter section (102); The small-diameter section (102) is used to be inserted into the end of the shell (2), and the end surface of the shell (2) is tightly pressed against the step surface (103).

3. The end cover fixing structure according to claim 2, characterized in that: The groove (11) is formed by being recessed in the axial direction from the outer end surface of the end cover (1); The axial depth of the groove (11) is greater than the length of the large-diameter section (101) and less than the overall length of the end cover (1).

4. The end cover fixing structure according to claim 2, characterized in that: Along the axial direction of the housing (2), at least one side of the protrusion (21) is provided with a through hole (22).

5. The end cover fixing structure according to claim 4, characterized in that: Along the axial direction of the shell (2), one side of the protrusion (21) is the side of the end of the shell (2), and the other side is the side of the through hole (22).

6. The end cover fixing structure according to claim 5, characterized in that: The raised portion (21) is formed by bending the strip portion (23) into the groove (11).

7. A motor, characterized in that: include: A housing (2) having a stator (3) and a rotor (4) disposed therein; The two end covers (1) are respectively fixed to the two ends of the shell (2) by using the end cover fixing structure according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that A motor bracket mounting block (5) is provided on the outer end surface of the end cover (1).

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