Integrally cast end cover of motor

Abstract

The utility model provides an integrally cast end cover of a motor, and belongs to the technical field of machinery. The problem that an existing end cover is poor in structural stability is solved. The motor integrally-cast end cover comprises an end cover body, the middle of the end cover body is a bearing seat with an approximately U-shaped axial section, the bearing seat comprises an inner ring and an outer ring which are distributed in the radial direction, an inner hole of the inner ring is a bearing hole, a circle of rib plate is formed between the inner ring and the outer ring, and the two sides of the rib plate extend to the inner side wall of the inner ring and the outer side wall of the outer ring respectively; a plurality of strip-shaped grooves are formed in the side wall of the inner ring in the radial direction in a penetrating mode, extend in the axial direction of the inner ring in the length direction and are evenly distributed in the circumferential direction of the inner ring. The integrally-cast end cover of the motor is stable in structure.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an electric motor, particularly an integrally cast end cap for an electric motor. Background Technology

[0002] The motor end cover is a structural component that connects the rotor and the motor frame. It serves two purposes: protecting the internal components of the motor and ensuring the relative position of the stator and rotor through rolling bearings housed within the end cover.

[0003] An existing motor end cover, such as the motor end cover and motor disclosed in the Chinese Patent Database (application number: 202110763636.1), includes an end cover body integrally stretched from a metal sheet. The end cover body includes a cover plate and an outer cylinder extending axially along the edge of the cover plate. The cover plate and the outer cylinder form a receiving cavity with one open end. The end cover body has a reinforcing structure, which includes: a first reinforcing area, a flange formed by extending radially from the open edge of the receiving cavity and then folding axially; a second reinforcing area, a protruding ring extending from the middle of the cover plate toward the open direction, wherein the upper end face of the protruding ring is flattened by a flattening tool to form a plane, and the inner and outer peripheral surfaces of the protruding ring are formed by a flattening tool to be perpendicular to the inner and outer sides of the cover plate; and a third reinforcing area, a circumferential reinforcing rib provided on the outer side of the cover plate near the edge.

[0004] In the aforementioned end cap, the inner hole of the convex ring is used to install the bearing. Since the wall thickness at this location is generally not very large after the sheet metal is stretched and formed, if the interference fit is too large after the bearing is pressed in, the convex ring will undergo slight deformation, affecting the stable operation of the motor. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a structurally stable integral cast end cap for motors.

[0006] The objective of this utility model can be achieved through the following technical solution: an integrally cast end cap for an electric motor, comprising an end cap body, the middle of which is a bearing seat with an axial cross-section approximately U-shaped, the bearing seat comprising an inner ring and an outer ring radially distributed, and the inner hole of the inner ring being a bearing hole, characterized in that a ring of ribs is formed between the inner ring and the outer ring, and the two sides of the ribs extend to the inner sidewall of the inner ring and the outer sidewall of the outer ring respectively; a strip groove is radially penetrating on the sidewall of the inner ring, and the length of the strip groove extends along the axial direction of the inner ring, and there are multiple strip grooves evenly distributed along the circumference of the inner ring.

[0007] By setting stiffeners between the inner and outer rings, the support for the inner ring is effectively strengthened, greatly enhancing its compressive strength and preventing deformation when the bearing is pressed in. At the same time, a strip groove is opened through the inner ring sidewall to release assembly stress locally, further reducing deformation or fretting wear caused by excessive interference fit of the inner ring, thereby extending the end cover life and improving the stability of motor operation.

[0008] In the aforementioned integral cast end cap for motors, the number of the aforementioned slots and stiffeners is the same, and the slots and stiffeners are alternately distributed along the inner circumference to release stress more quickly and evenly.

[0009] In the aforementioned integrally cast end cover for the motor, a sealing element is fixed on the inner ring. The number of sealing elements is the same as the number of slots, and their positions correspond one-to-one. The sealing element closes the opening of the corresponding slot to the outer ring. By sealing the slot opening with the sealing element, external dust, water, and other impurities can be effectively prevented from entering the motor, thus ensuring stable motor operation.

[0010] In the aforementioned integrated cast end cap for motors, the sealing component is a rubber plug, and one end of the rubber plug is clamped in the strip groove to seal the opening of the strip groove. It has the advantages of simple structure and stable operation.

[0011] In the aforementioned integral cast end cap for the motor, the rubber plug has a T-shaped cross-section along the inner ring axially. The rubber plug includes a head and a rod that matches the slot. The head presses against the outer surface of the inner ring, and the rod is secured in the slot. This design allows the rubber plug to be pressed into place in one go, facilitating assembly.

[0012] In the aforementioned integral cast end cap for the motor, the cross-section of the head is an arc shape that matches the outer side of the inner ring, so that the rubber plug can be inserted along the axial direction of the inner ring, further facilitating assembly.

[0013] As another option, in the aforementioned integral cast end cap for the motor, the sealing component is a rubber block that is attached to and fixed on the outer surface of the inner ring, and the rubber block covers the groove of the corresponding strip near the outer ring.

[0014] In the aforementioned integral cast end cap for the motor, the width of the strip groove is 0.1mm to 0.3mm.

[0015] Compared with existing technologies, the one-piece cast end cap of this motor has the following advantages:

[0016] 1. By setting stiffeners between the inner and outer rings, the support for the inner ring is effectively strengthened, greatly enhancing the compressive strength of the inner ring and preventing deformation when the bearing is pressed in. At the same time, a strip groove is opened through the inner ring side wall to release assembly stress locally, further reducing deformation or fretting wear of the inner ring caused by excessive interference fit, so as to extend the end cover life and improve the stability of motor operation.

[0017] 2. The sealing component is installed to seal the slot opening, which can effectively prevent external dust, water and other impurities from entering the motor and ensure stable motor operation. Attached Figure Description

[0018] Figure 1This is a cross-sectional view of the integrally cast end cap of this motor.

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 This is a side view of the integrally cast end cap of this motor.

[0021] In the figure, 1 is the end cap body; 2 is the bearing seat; 2a is the inner ring; 2a1 is the strip groove; 2b is the outer ring; 2c is the stiffening plate; 3 is the rubber plug; 3a is the head; and 3b is the rod. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] Example 1

[0024] like Figure 1 As shown, the integral cast end cover of this motor includes an end cover body 1, and the middle part of the end cover body 1 is an annular bearing seat 2, and the axial cross section of the bearing seat 2 is approximately U-shaped.

[0025] Specifically

[0026] The bearing housing 2 includes an inner ring 2a and an outer ring 2b arranged radially. The inner ring 2a is located inside the outer ring 2b, and the inner hole of the inner ring 2a serves as the bearing bore. During actual installation, the bearing is pressed into the inner hole of the inner ring 2a for installation.

[0027] like Figure 1 and Figure 3 As shown, a reinforcing rib 2c is formed between the inner ring 2a and the outer ring 2b. The length of the reinforcing rib 2c extends radially along the bearing seat 2, and its two sides extend to the inner wall of the inner ring 2a and the outer wall of the outer ring 2b, respectively. A strip-shaped groove 2a1 is radially penetrating the side wall of the inner ring 2a, and the length of the strip-shaped groove 2a1 extends axially along the inner ring 2a. There are multiple strip-shaped grooves 2a1, evenly distributed circumferentially along the inner ring 2a. Furthermore, the number of strip-shaped grooves 2a1 and the reinforcing rib 2c are the same, and the strip-shaped grooves 2a1 and the reinforcing rib 2c are alternately distributed circumferentially along the inner ring 2a to release stress more quickly and evenly.

[0028] By setting a stiffener 2c between the inner ring 2a and the outer ring 2b, the support of the inner ring 2a is effectively strengthened, greatly enhancing the compressive strength of the inner ring 2a and preventing deformation when the bearing is pressed in. At the same time, a strip groove 2a1 is opened through the side wall of the inner ring 2a to release assembly stress locally, further reducing the deformation or fretting wear of the inner ring 2a caused by excessive interference fit, so as to extend the end cover life and improve the running stability of the motor.

[0029] like Figure 1 and Figure 2 As shown, a sealing component is fixed on the inner ring 2a. The number of sealing components is the same as that of the strip grooves 2a1, and their positions correspond one-to-one. The sealing component closes the opening of the corresponding strip groove 2a1 near the outer ring 2b. By setting the sealing component to close the opening of the strip groove 2a1, external dust, water, and other impurities can be effectively prevented from entering the motor, thus ensuring stable operation of the motor.

[0030] In this embodiment, the sealing component is a rubber plug 3, and one end of the rubber plug 3 is clamped in the strip groove 2a1 to seal the opening of the strip groove 2a1, which has the advantages of simple structure and stable operation. Further, the rubber plug 3 has a T-shaped cross-section along the axial direction of the inner ring 2a. The rubber plug 3 includes a head 3a and a rod portion 3b that matches the strip groove 2a1. The head 3a presses against the outer surface of the inner ring 2a, and the rod portion 3b is clamped in the strip groove 2a1. This design allows the rubber plug 3 to be pressed into place in one go, facilitating assembly. Preferably, the cross-section of the head 3a is an arc shape that matches the outer surface of the inner ring 2a, so that the rubber plug 3 can be clamped in along the axial direction of the inner ring 2a, further facilitating assembly.

[0031] In actual products, the width of the strip groove 2a1 is 0.1mm to 0.3mm, and preferably 0.2mm.

[0032] Example 2

[0033] The structure and principle of this embodiment are basically the same as those of embodiment one. The difference is that the sealing component is a rubber block that is attached to and fixed on the outer side of the inner ring 2a, and the rubber block covers the groove of the corresponding strip groove 2a1 that is close to the outer ring 2b.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An integrally cast end cap for an electric motor, comprising an end cap body (1), wherein the middle part of the end cap body (1) is a bearing seat (2) with an axial cross-section approximately U-shaped, the bearing seat (2) comprising an inner ring (2a) and an outer ring (2b) radially distributed, and the inner hole of the inner ring (2a) is a bearing hole, characterized in that, A rib plate (2c) is formed between the inner ring (2a) and the outer ring (2b), and the two sides of the rib plate (2c) extend to the inner sidewall of the inner ring (2a) and the outer sidewall of the outer ring (2b), respectively; a strip groove (2a1) is radially penetrating the sidewall of the inner ring (2a), and the length of the strip groove (2a1) extends along the axial direction of the inner ring (2a), and there are multiple strip grooves (2a1) that are evenly distributed along the circumference of the inner ring (2a).

2. The integrally cast end cap for the motor according to claim 1, characterized in that, The number of the strip grooves (2a1) and stiffeners (2c) mentioned above is the same, and the strip grooves (2a1) and stiffeners (2c) are alternately distributed along the inner ring (2a) circumferentially.

3. The integrally cast end cap for the motor according to claim 1 or 2, characterized in that, A sealing element is fixed on the inner ring (2a). The number of sealing elements is the same as the number of strip grooves (2a1) and their positions correspond one-to-one. The sealing element closes the groove of the corresponding strip groove (2a1) near the outer ring (2b).

4. The integrally cast end cap for the motor according to claim 3, characterized in that, The sealing component is a rubber plug (3), and one end of the rubber plug (3) is clamped in the strip groove (2a1).

5. The integrally cast end cap for the motor according to claim 4, characterized in that, The rubber plug (3) has a T-shaped cross section in the axial direction of the inner ring (2a). The rubber plug (3) includes a head (3a) and a rod (3b) that matches the strip groove (2a1). The head (3a) is pressed on the outer surface of the inner ring (2a), and the rod (3b) is clamped in the strip groove (2a1).

6. The integrally cast end cap for the motor according to claim 5, characterized in that, The cross-section of the head (3a) is an arc shape that matches the outer surface of the inner ring (2a).

7. The integrally cast end cap for the motor according to claim 3, characterized in that, The sealing element is a rubber block that is attached to and fixed on the outer side of the inner ring (2a), and the rubber block covers the groove of the corresponding strip groove (2a1) near the outer ring (2b).

8. The integrally cast end cap for the motor according to claim 1, characterized in that, The width of the strip groove (2a1) is 0.1mm to 0.3mm.

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