Gasket protection structure and motor casing thereof

Abstract

The utility model discloses a gasket protection structure and a motor casing thereof, and belongs to the technical field of automobile motors. Comprising an end cover and a bearing hole formed in the end cover. A bearing is mounted in the bearing hole; the positioning ring is mounted at the bottom of the bearing hole; the waveform gasket is mounted on the positioning ring; the corrugated gasket is extruded between the positioning ring and the bearing; wherein the positioning ring is of a step structure with a low outer ring and a high inner ring; the positioning ring is mounted on an outer ring of the positioning ring, and a plurality of grooves matched with the waveform gaskets are formed in the end face of the outer ring; when the bearing compresses the wave-shaped gasket inwards by a certain distance, the bearing abuts against the inner ring of the positioning ring. The positioning ring limits the compression stroke of the wave-shaped gasket and prevents the wave-shaped gasket from reaching the compression limit, so that the service life of the wave-shaped gasket is prolonged; the grooves in the positioning ring are matched with the troughs of the corrugated gasket, so that correct positioning and stable installation of the corrugated gasket are ensured, and the reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive motor technology, specifically to a gasket protection structure and its motor housing. Background Technology

[0002] In the field of motor manufacturing, the motor shaft will experience axial movement during operation. Therefore, a corrugated shim is usually installed between the bearing at the end of the motor shaft and the motor housing to buffer this reciprocating impact force. When the motor shaft moves axially, it will cause the bearing to compress the corrugated shim. If this compression repeatedly reaches or exceeds the bearing limit of the corrugated shim, it will lead to a decrease in the performance of the corrugated shim or even damage, thereby affecting the stability and service life of the motor. Utility Model Content

[0003] The purpose of this invention is to provide a gasket protection structure and its motor housing to improve the problem of performance degradation or damage caused by interference fit of the wave gasket.

[0004] This utility model adopts the following technical solution: a gasket protection structure, including an end cap and a bearing hole opened on the end cap; a bearing is installed in the bearing hole;

[0005] Also includes:

[0006] A locating ring is installed at the bottom of the bearing hole;

[0007] A corrugated gasket is installed on the positioning ring; the corrugated gasket is pressed between the positioning ring and the bearing.

[0008] The positioning ring has a stepped structure with a lower outer ring and a higher inner ring. The positioning ring is installed on the outer ring of the positioning ring, and the end face of the outer ring has multiple grooves that mate with the wave-shaped gasket. When the bearing compresses the wave-shaped gasket inward to a certain distance, the bearing abuts against the inner ring of the positioning ring.

[0009] Preferably, when the bearing compresses the wave shim inward to a certain distance, the inner ring of the bearing abuts against the inner ring of the positioning ring.

[0010] Preferably, the waveform pad has a ring structure.

[0011] Preferably, the inner diameter of the wave-shaped gasket is larger than the inner diameter of the outer ring of the positioning ring, and the outer diameter of the wave-shaped gasket is smaller than the outer diameter of the outer ring of the positioning ring.

[0012] Preferably, the outer side of the inner ring of the positioning ring has a positioning boss, the height of which is higher than the trough of the wave pad; after the wave pad is installed on the positioning ring, a protrusion is formed by stamping the positioning boss to prevent the wave pad from detaching from the positioning ring.

[0013] Preferably, the bearing hole of the end cap has an inner liner, which is integrally cast with the end cap.

[0014] A gasket protection structure includes an end cap and a bearing hole formed in the end cap; a bearing is installed in the bearing hole;

[0015] Also includes:

[0016] A locating ring is installed at the bottom of the bearing hole;

[0017] A corrugated gasket is installed on the positioning ring; the corrugated gasket is pressed between the positioning ring and the bearing.

[0018] The positioning ring has a stepped structure with a higher outer ring and a lower inner ring. The positioning ring is installed on the inner ring of the positioning ring, and the end face of the inner ring has multiple grooves that mate with the wave-shaped gasket. When the bearing compresses the wave-shaped gasket inward to a certain distance, the bearing abuts against the outer ring of the positioning ring.

[0019] When the bearing compresses the wave shim inward to a certain distance, the outer ring of the bearing abuts against the outer ring of the locating ring.

[0020] A gasket protection structure includes an end cap and a bearing hole formed in the end cap; a bearing is installed in the bearing hole;

[0021] Its characteristic is that it further includes:

[0022] A locating ring is installed at the bottom of the bearing hole;

[0023] A corrugated gasket is installed on the positioning ring; the corrugated gasket is pressed between the positioning ring and the bearing.

[0024] The positioning ring end face has multiple grooves that mate with the troughs of the wave pad, and there are arc-shaped protrusions between adjacent grooves; when the bearing compresses the wave pad inward to a certain distance, the crest of the wave pad abuts against the arc-shaped protrusion.

[0025] An electric motor housing, the electric motor housing including a gasket protection structure.

[0026] The beneficial effects of this utility model are as follows:

[0027] The locating ring effectively prevents the corrugated gasket from being damaged due to excessive compression. The corrugated gasket is positioned between the locating ring and the inner end of the bearing. When the bearing compresses the corrugated gasket due to the axial movement of the motor shaft, the locating ring limits the compression stroke of the corrugated gasket, preventing it from reaching the compression limit, thereby extending the service life of the corrugated gasket.

[0028] The groove on the positioning ring matches the trough of the corrugated gasket, ensuring the correct positioning and stable installation of the corrugated gasket. In addition, after the corrugated gasket is installed on the positioning ring, the positioning boss can form a protruding point through stamping, further restricting the corrugated gasket from detaching from the positioning ring, simplifying the installation process and improving the reliability of the installation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a gasket protection structure provided for an embodiment of the present utility model.

[0031] Figure 2 This is a cross-sectional view of a gasket protection structure provided for an embodiment of the present utility model.

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0033] Figure 4 This is an assembly diagram of a positioning ring and a wave-shaped gasket according to an embodiment of the present invention.

[0034] Figure 5 This is an assembly diagram of the positioning ring and the wave-shaped gasket in Embodiment 2 of this utility model.

[0035] Figure 6 This is an assembly diagram of three positioning rings and wave-shaped gaskets according to embodiments of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. End cap; 11. Bearing bore; 12. Inner liner;

[0038] 2. Bearings;

[0039] 3. Wave-shaped gasket;

[0040] 4. Positioning ring; 41. Groove; 42. Positioning boss; 43. Arc-shaped protrusion. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Example 1:

[0043] like Figures 1 to 3 As shown, this utility model provides a gasket protection structure, including an end cap 1 with a bearing hole 11. In this embodiment, the bearing hole 11 of the end cap 1 has an inner liner 12, which is integrally cast with the end cap 1. The end cap 1 is made of aluminum, and the inner liner 12 is made of steel, which reduces the weight of the end cap 1 while improving the durability of the bearing hole 11. The motor shaft passes through the bearing 2, which is installed in the bearing hole 11. A wave-shaped gasket 3 is disposed at the inner end of the bearing 2 to provide cushioning. When the motor shaft is working, it will move axially upwards, and the magnitude of the movement is uncontrollable. This may cause the bearing 2 to compress the wave-shaped gasket 3 to its limit position, greatly accelerating the fatigue damage of the wave-shaped gasket 3.

[0044] Combined Figure 4 As shown, in this embodiment, a positioning ring 4 is installed at the bottom of the bearing hole 11, and a wave-shaped washer 3 is positioned between the positioning ring 4 and the inner end of the bearing 2. The positioning ring 4 has an annular stepped structure with a lower outer ring and a higher inner ring. Multiple grooves 41 evenly distributed around its own axis are formed on the end face of the outer ring of the positioning ring 4. The positioning ring 4 is fitted onto the inner ring of the positioning ring 4 and abuts against the end face of the outer ring of the positioning ring 4. The troughs of the wave-shaped washer 3 fit into the grooves 41. The inner ring of the positioning ring 4 is lower than the crests of the wave-shaped washer 3.

[0045] When in use, the bearing 2 is installed into the bearing hole 11. The bearing 2 will pre-compress the wave shim 3 inward. At this time, the bearing 2 is still a certain distance away from the inner ring of the positioning ring 4. The wave shim 3 provides elasticity to the bearing 2 at this distance. When the bearing 2 compresses the wave shim 3 inward to reach this distance, the bearing 2 will press against the inner ring of the positioning ring 4 to prevent the wave shim 3 from reaching the compression limit and improve the service life of the wave shim 3.

[0046] In this embodiment, the wave-shaped gasket 3 has an annular closed or open structure. The inner diameter of the wave-shaped gasket 3 is larger than the inner diameter of the outer ring of the positioning ring 4, and the outer diameter of the wave-shaped gasket 3 is smaller than the outer diameter of the outer ring of the positioning ring 4. When the bearing 2 compresses the wave-shaped gasket 3 inward to a certain distance, the inner ring of the bearing 2 abuts against the inner ring of the positioning ring 4, and the outer ring of the bearing 2 and the inner ring of the positioning ring 4 are completely interlocked and do not contact each other.

[0047] In this embodiment, the outer side of the inner ring of the positioning ring 4 has a positioning boss 42, the height of which is higher than the trough of the corrugated gasket 3. In actual use, after the corrugated gasket 3 is installed on the positioning ring 4, the positioning boss 42 can be punched with iron nails to form a protruding point; the protruding point is located above the trough of the corrugated gasket 3, thereby restricting the corrugated gasket 3 from detaching from the positioning ring 4, facilitating the smooth installation of the positioning ring 4 and the corrugated gasket 3 into the bearing hole 11.

[0048] Example 2:

[0049] Based on the above embodiment one, combined with Figure 5 As shown, the difference between this second embodiment and the first embodiment is:

[0050] The positioning ring 4 adopts an annular stepped structure with a higher outer ring and a lower inner ring. A groove 41 is opened on the end face of the inner ring, and a positioning boss 42 is provided on the inner side of the outer ring. In use, the wave-shaped gasket 3 is fitted into the outer ring of the positioning ring 4, and the trough of the wave-shaped gasket 3 fits into the groove 41. When the bearing 2 compresses the wave-shaped gasket 3 inward to a certain distance, the bearing 2 abuts against the outer ring of the positioning ring 4, limiting the bearing 2 and preventing the wave-shaped gasket 3 from reaching its compression limit, thereby improving the service life of the wave-shaped gasket 3.

[0051] Example 3:

[0052] Based on the above embodiment one, combined with Figure 6 As shown, the difference between this embodiment three and embodiment one is:

[0053] The positioning ring 4 does not adopt an annular stepped structure, but only a single annular structure; the end face of the positioning ring 4 has evenly distributed grooves 41, and there are arc-shaped protrusions 43 between adjacent grooves 41. In use, the troughs of the wave pad 3 fit into the grooves 41, and the crests of the wave pad 3 are located above the arc-shaped protrusions 43 and are at a certain distance from the arc-shaped protrusions 43. The wave pad 3 provides elasticity to the bearing 2 at this distance; when the bearing 2 compresses the wave pad 3 inward to a certain distance, the crests of the wave pad 3 abut against the arc-shaped protrusions 43, limiting the bearing 2, preventing the wave pad 3 from reaching its compression limit, and improving the service life of the wave pad 3.

[0054] Example 4:

[0055] This fourth embodiment provides a motor housing, which adopts a gasket protection structure from any of the above embodiments.

[0056] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A gasket protection structure, comprising an end cover and a bearing hole opened in the end cover; a bearing is installed in the bearing hole; characterized in that Further comprising: a positioning ring installed at the bottom of the bearing hole; a wave-shaped gasket installed on the positioning ring; the wave-shaped gasket is extruded between the positioning ring and the bearing; wherein the positioning ring is a stepped structure with an outer ring lower and an inner ring higher; the positioning ring is installed on the outer ring of the positioning ring, and the end face of the outer ring is provided with a plurality of grooves matched with the wave-shaped gasket; when the bearing compresses the wave-shaped gasket inward to a certain distance, the inner ring of the bearing abuts against the inner ring of the positioning ring.

2. The gasket protection structure of claim 1, wherein: When the bearing compresses the wave-shaped gasket inward to a certain distance, the inner ring of the bearing abuts against the inner ring of the positioning ring.

3. The gasket protection structure of claim 1, wherein: The wave-shaped gasket is a ring structure.

4. The gasket protection structure of claim 3, wherein: The inner diameter of the wave-shaped gasket is larger than the inner diameter of the outer ring of the positioning ring, and the outer diameter of the wave-shaped gasket is smaller than the outer diameter of the outer ring of the positioning ring.

5. The gasket protection structure of claim 3, wherein: The outer side of the inner ring of the positioning ring has a ring of positioning bosses, and the height of the positioning bosses is higher than the wave trough of the wave-shaped gasket; after the wave-shaped gasket is installed on the positioning ring, the positioning bosses are formed into protruding points by stamping, which are used to prevent the wave-shaped gasket from separating from the positioning ring.

6. The gasket protection structure of claim 1, wherein: The bearing hole of the end cover has an inner lining layer, which is integrally cast with the end cover.

7. A gasket protection structure, comprising an end cover and a bearing hole opened in the end cover; a bearing is installed in the bearing hole; characterized in that Further comprising: a positioning ring installed at the bottom of the bearing hole; a wave-shaped gasket installed on the positioning ring; the wave-shaped gasket is extruded between the positioning ring and the bearing; wherein the positioning ring is a stepped structure with an outer ring higher and an inner ring lower; the positioning ring is installed on the inner ring of the positioning ring, and the end face of the inner ring is provided with a plurality of grooves matched with the wave-shaped gasket; when the bearing compresses the wave-shaped gasket inward to a certain distance, the outer ring of the bearing abuts against the outer ring of the positioning ring.

8. The gasket protection structure of claim 7, wherein: When the bearing compresses the wave-shaped gasket inward to a certain distance, the outer ring of the bearing abuts against the outer ring of the positioning ring.

9. A gasket protection structure, comprising an end cover and a bearing hole opened in the end cover; a bearing is installed in the bearing hole; characterized in that Further comprising: a positioning ring installed at the bottom of the bearing hole; a wave-shaped gasket installed on the positioning ring; the wave-shaped gasket is extruded between the positioning ring and the bearing; wherein the end face of the positioning ring is provided with a plurality of grooves matched with the wave trough of the wave-shaped gasket, and there is an arc-shaped protrusion between adjacent grooves; when the bearing compresses the wave-shaped gasket inward to a certain distance, the wave crest of the wave-shaped gasket abuts against the arc-shaped protrusion.

10. An electrical machine housing, characterized by: The motor shell comprises a gasket protection structure according to any one of claims 1-7.

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