Motor

Abstract

The invention relates to the technical field of motors, and discloses a motor, which comprises a shell, a stator and a chip collection protective sleeve, the shell is provided with a mounting cavity; the stator is inserted into the mounting cavity and is in interference fit with the shell; the chip collection protective sleeve comprises an annular main body and an annular bending part, and the upper end face of the annular main body is suitable for abutting against the stator; the first end of the annular bending part is connected to the outer wall of the annular main body, the annular bending part gradually extends from the annular main body to the direction deviating from the annular main body, and the annular bending part is suitable for deforming and abutting against the inner wall of the shell; the shell, the stator, the annular main body and the annular bending part are enclosed to form a chip collecting space; the inner wall of the shell is attached in a self-adaptive mode through deformation of the annular bending part, and the upper end face of the annular body abuts against the stator, so that a space for containing chippings generated in the assembling process of the stator and the shell is formed in the motor, and the chippings generated in the assembling process are effectively prevented from affecting operation of components in the motor.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a motor. Background Technology

[0002] An electric motor typically consists of a rotor, a stator, and a housing. To ensure the relative fixation of the stator and the housing, the existing technology usually adopts an interference fit between the stator and the housing, and the stator is pressed into the housing for fixation by extrusion. During the pressing process, peeling debris is generated between the stator and the housing. The debris falls into the housing and affects the operation of the internal components of the motor, resulting in problems such as high motor noise and short service life. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a motor that can collect debris generated during the assembly of the stator and housing through a debris collection protective sleeve, thereby preventing the debris from affecting the operation of the motor's internal components.

[0004] This invention provides a motor, comprising: The outer casing has a mounting cavity; The stator is inserted into the mounting cavity and is interference-fitted with the housing; A chip collection protective sleeve includes an annular body and an annular bend portion. The upper end face of the annular body is adapted to abut against the stator. The first end of the annular bend portion is connected to the outer wall of the annular body, and the annular bend portion gradually extends from the annular body in a direction away from the annular body. The annular bend portion is adapted to deform and abut against the inner wall of the outer shell. The outer shell, the stator, the annular body, and the annular bend form a chip collection space.

[0005] According to some embodiments of the present invention, the chip collection protective sleeve further includes a sleeve portion connected to the upper end face of the annular body. The sleeve portion is provided with a plurality of abutment surfaces extending axially along the annular body, and the abutment surfaces are adapted to abut and fix against the inner wall of the stator core of the stator.

[0006] According to some embodiments of the present invention, the sleeve portion is a sleeve ring, the annular body is provided with a relief groove surrounding the sleeve portion, and the inner wall of the relief groove is connected to the outer wall of the sleeve portion.

[0007] According to some embodiments of the present invention, the extending direction of the annular bend is at an acute angle to the direction from the lower end face of the annular body to the upper end face of the annular body, and the annular bend and the annular body are sandwiched to form a chip collection groove.

[0008] According to some embodiments of the present invention, the annular body includes a first base ring and a second base ring, a stepped surface is formed between the first base ring and the second base ring, and the stepped surface connects the annular bend portion; The chip collection groove is sandwiched between the first base ring and the annular bend.

[0009] According to some embodiments of the present invention, the shortest distance from the upper end face of the annular body to the first end of the annular bend is greater than or equal to the length of the cross section of the annular bend along the extending direction of the annular bend.

[0010] According to some embodiments of the present invention, the wall of the chip collection groove is provided with an adhesive layer.

[0011] According to some embodiments of the present invention, a reserved gap is provided between the lower end face of the stator and the bottom wall of the housing, and the reserved gap communicates with the lower end face of the annular body.

[0012] According to some embodiments of the present invention, the cross-sectional thickness of the annular bend gradually decreases along the extending direction of the annular bend.

[0013] According to some embodiments of the present invention, the chip collection protective sleeve is made of plastic.

[0014] The embodiments of the present invention have at least the following beneficial effects: by adapting the deformation of the annular bending portion to fit the inner wall of the outer shell, and by combining the upper end face of the annular body with the stator, a space is formed inside the motor to accommodate the debris generated during the assembly of the stator and the outer shell, effectively preventing the debris generated during the assembly process from affecting the operation of the internal components of the motor; furthermore, the annular structure of the chip collection protective sleeve is simple and efficient to install, and will not affect the original pressing process of the stator and the outer shell, greatly avoiding the cost of changing the motor wiring.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the motor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the chip collection protective sleeve according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of part A in the middle.

[0017] Figure label: 100. Chip collection protective sleeve; 110. Annular body; 111. Circumferential groove; 112. First base ring; 113. Second base ring; 120. Annular bend; 130. Chip collection groove; 140. Sleeve joint; 141. Abutment surface; 910. Stator; 920. Housing. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, and "above," "below," "within," etc. are understood to include the stated number. If "first," "second," etc. are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set", "install", and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Please refer to Figures 1 to 3As shown, an embodiment of the present invention provides a motor, including a housing 920, a stator 910, and a chip collection protective sleeve 100; the housing 920 has a mounting cavity; the stator 910 is inserted into the mounting cavity and is interference-fitted with the housing 920; the chip collection protective sleeve 100 includes an annular body 110 and an annular bent portion 120, the upper end surface of the annular body 110 is adapted to abut against the stator 910; the first end of the annular bent portion 120 is connected to the outer wall of the annular body 110, and the annular bent portion 120 gradually extends from the annular body 110 in a direction away from the annular body 110, the annular bent portion 120 is adapted to deform and abut against the inner wall of the housing 920; the housing 920, the stator 910, the annular body 110, and the annular bent portion 120 enclose a chip collection space.

[0023] According to an embodiment of the present invention, during the assembly process of the stator 910 and the housing 920, the stator 910 will crush and dislodge debris from the housing 920. The annular bend 120 deforms and abuts against the inner wall of the housing 920. The debris falls into the space formed between the inner wall of the housing 920, the annular bend 120, and the annular body 110 until the stator 910 is installed in place and the upper end face of the annular body 110 abuts against the stator 910, so that a closed debris collection space is formed between the inner wall of the housing 920, the annular bend 120, the annular body 110, and the stator 910. The debris collection space completely isolates the debris from other components inside the motor.

[0024] According to the present invention, the motor adapts to the inner wall of the outer casing 920 by the deformation of the annular bending portion 120, and combines the upper end face of the annular body 110 with the abutment of the stator 910 to form a space inside the motor to accommodate the debris generated during the assembly of the stator 910 and the outer casing 920. This effectively prevents the debris generated during the assembly process from affecting the operation of the internal components of the motor. Furthermore, the annular structure of the chip collection sleeve 100 is simple and efficient to install, and will not affect the original pressing process of the stator 910 and the outer casing 920, thus greatly avoiding the cost of changing the motor wiring.

[0025] In this embodiment, the annular body 110 and the annular bend 120 are adapted to the motor structure as a ring. Of course, the shape can be adjusted according to different motor structures, such as a rectangular ring or an irregular ring.

[0026] In some embodiments, combined with Figures 1 to 3 As shown, the chip collection protective sleeve 100 also includes a sleeve portion 140, which is connected to the upper end face of the annular body 110. The sleeve portion 140 is provided with a plurality of abutment surfaces 141 extending along the axial direction of the annular body 110. The abutment surfaces 141 are adapted to abut and fix with the inner wall of the stator core of the stator 910.

[0027] In this embodiment, when assembling the motor, the sleeve 140 can be preferentially abutted and fixed to the stator core, so that the stator 910 and the chip collection protective sleeve 100 form an integral whole and are simultaneously pressed into the housing 920. Then, during the assembly of the stator 910, the upper end face of the annular body 110 is always in contact with the stator 910, so that the inner wall of the housing 920, the annular bend 120, the annular body 110 and the stator 910 form a closed chip collection space that is always closed. The chips that are squeezed off by the stator 910 and the housing 920 fall stably into the closed chip collection space, effectively avoiding the leakage of chips during the assembly process.

[0028] In this embodiment, the sleeve part 140 can be based on the original stator core inner wall design, that is, there is no need to make structural adjustments to the stator core inside the existing motor design, thus reducing the motor design and manufacturing cost; of course, a structure fixed to the sleeve part 140 can also be designed independently in the stator 910, and the specific form can refer to the snap-fit ​​structure, hole-shaft mating structure, etc. in the prior art.

[0029] In some embodiments, combined with Figures 1 to 3 As shown, the socket 140 is a socket ring, and the annular body 110 is provided with a relief groove 111 surrounding the socket 140, and the inner wall of the relief groove 111 is connected to the outer wall of the socket 140.

[0030] In this embodiment, the clearance groove 111 is used to avoid the corner of the stator 910, so that the upper end surface of the annular body 110 is fully in contact with the stator 910 and the contact surface 141 is fully in contact with the inner wall of the stator core, thereby improving the sealing of the enclosed chip collection space.

[0031] In some embodiments, combined with Figures 1 to 3 As shown, the extension direction of the annular bend 120 forms an acute angle with the direction from the lower end face of the annular body 110 to the upper end face of the annular body 110, and the annular bend 120 and the annular body 110 are sandwiched to form a chip collection groove 130.

[0032] In this embodiment, the angled annular bend 120 is easier to insert into the housing 920, and the pre-set chip collection groove 130 allows the chips to fall to the bottom of the chip collection groove 130, avoiding the accumulation of chips at the contact position between the annular bend 120 and the housing 920, thus improving the chip collection effect.

[0033] In other embodiments, the extension direction of the annular bend 120 may be set to be at a right angle or an obtuse angle to the direction from the lower end face of the annular body 110 to the upper end face of the annular body 110, so as to ensure that the annular bend 120 deforms and abuts against the inner wall of the outer shell 920 during the insertion of the outer shell 920.

[0034] In some embodiments, combined with Figures 1 to 3As shown, the annular body 110 includes a first base ring 112 and a second base ring 113. A stepped surface is formed between the first base ring 112 and the second base ring 113, and the stepped surface is connected to the annular bending portion 120. A chip collection groove 130 is sandwiched between the first base ring 112 and the annular bending portion 120.

[0035] In this embodiment, by setting a stepped surface (i.e., in the radial direction of the chip collection protective sleeve 100, the cross-sectional thickness of the first base ring 112 is less than the cross-sectional thickness of the second base ring 113), the cross-sectional thickness of the first end of the annular bend 120 connected to the stepped surface can be set to be thicker, so as to prevent the annular bend 120 from breaking from the first end during the bending process.

[0036] In some embodiments, combined with Figures 1 to 3 As shown, the shortest distance from the upper end face of the annular body 110 to the first end of the annular bend 120 is greater than or equal to the length of the cross-section of the annular bend 120 along its extension direction. Even if the annular bend 120 is bent to be parallel to the axis of the chip collection sleeve 100, it cannot exceed the upper end face of the annular body 110 in height, thus preventing the annular bend 120 from abutting against the stator 910 during bending and ensuring that the debris generated between the stator 910 and the outer casing 920 falls stably into the chip collection space.

[0037] In some embodiments, the wall of the chip collection groove 130 is provided with an adhesive layer (not shown in the figure). The adhesive layer is used to adsorb chips, prevent chips from moving in the chip collection space, and effectively reduce motor noise.

[0038] In this embodiment, the adhesive layer can be made of resin, gel, etc.

[0039] In some embodiments, a reserved gap is provided between the lower end face of the stator 910 and the bottom wall of the housing 920, and the reserved gap connects to the lower end face of the annular body 110. The reserved gap ensures that the stator 910 and the chip collection protective sleeve 100 have sufficient space to be installed in place.

[0040] In this embodiment, the height of the reserved gap is 1 mm to 3 mm, which fully covers the manufacturing and assembly errors of the stator 910 and the housing 920.

[0041] In some embodiments, the cross-sectional thickness of the annular bend 120 gradually decreases along its extending direction. A smaller cross-sectional thickness is more conducive to the deformation of the annular bend 120 and improves the sealing performance between the annular bend 120 and the housing 920.

[0042] In some embodiments, the chip collection protective sleeve 100 is made of plastic. Plastic has a certain structural strength while also having good deformation capacity; of course, silicone, rubber, etc., can also be used in other embodiments.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An electric motor, characterized in that, include: The outer casing (920) has a mounting cavity; Stator (910), which is inserted into the mounting cavity and is interference-fitted with the housing (920); The chip collection protective sleeve (100) includes an annular body (110) and an annular bend (120). The upper end face of the annular body (110) is adapted to abut against the stator (910). The first end of the annular bend (120) is connected to the outer wall of the annular body (110), and the annular bend (120) gradually extends from the annular body (110) in a direction away from the annular body (110). The annular bend (120) is adapted to deform and abut against the inner wall of the outer shell (920). The outer shell (920), the stator (910), the annular body (110), and the annular bend (120) enclose a chip collection space.

2. The motor according to claim 1, characterized in that, The chip collection protective sleeve (100) also includes a sleeve portion (140), which is connected to the upper end face of the annular body (110). The sleeve portion (140) is provided with a plurality of abutment surfaces (141) extending along the axial direction of the annular body (110). The abutment surfaces (141) are adapted to abut and fix with the inner wall of the stator core of the stator (910).

3. The motor according to claim 2, characterized in that, The socket (140) is a socket ring, and the annular body (110) is provided with a relief groove (111) surrounding the socket (140), and the inner wall of the relief groove (111) is connected to the outer wall of the socket (140).

4. The motor according to any one of claims 1 to 3, characterized in that, The extension direction of the annular bend (120) is at an acute angle to the direction from the lower end face of the annular body (110) to the upper end face of the annular body (110), and the annular bend (120) and the annular body (110) are sandwiched to form a chip collection groove (130).

5. The motor according to claim 4, characterized in that, The annular body (110) includes a first base ring (112) and a second base ring (113), and a stepped surface is formed between the first base ring (112) and the second base ring (113), the stepped surface connecting the annular bend (120). The first base ring (112) and the annular bend (120) are sandwiched together by the chip collection groove (130).

6. The motor according to claim 4, characterized in that, The shortest distance from the upper end face of the annular body (110) to the first end of the annular bend (120) is greater than or equal to the length of the cross section of the annular bend (120) along the extending direction of the annular bend (120).

7. The motor according to claim 4, characterized in that, The wall of the chip collection groove (130) is provided with an adhesive layer.

8. The motor according to any one of claims 1 to 3, characterized in that, A reserved gap is provided between the lower end face of the stator (910) and the bottom wall of the outer shell (920), and the reserved gap is connected to the lower end face of the annular body (110).

9. The motor according to any one of claims 1 to 3, characterized in that, Along the extending direction of the annular bend (120), the cross-sectional thickness of the annular bend (120) gradually decreases.

10. The motor according to any one of claims 1 to 3, characterized in that, The chip collection protective sleeve (100) is made of plastic.

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