Lubricating structure of motor shaft

Abstract

The utility model provides a lubricating structure of a motor shaft. The lubricating structure comprises a stator assembly, a rotor assembly, a support, a bearing, a pressing ring and annular oil storage cotton. The rotor assembly is rotationally connected to the inner side of the stator assembly, the support is fixed to the end of the stator assembly, an embedding groove is formed in the middle of the inner bottom of the support, the lower portion of the bearing is embedded in the embedding groove and rotationally matched with the embedding groove, an annular cavity is formed in the inner side of the support located above the embedding groove, and the outer edge of the pressing ring is riveted to an opening in the upper end of the annular cavity in a pressing mode. A plurality of clamping jaws which are distributed at intervals in the circumferential direction are arranged on the inner edge of the pressing ring, a rotating shaft in the rotor assembly is arranged in a bearing in a penetrating mode, and the oil storage cotton is embedded in an annular concave cavity located below the pressing ring; the lubricating structure further comprises an annular oil blocking cover. The upper part of the oil baffle cover covers the bearing and is in clearance fit with the bearing; abrasion between the bearing and the support and between the bearing and the pressing ring can be effectively avoided, and the service life of the motor can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a lubrication structure for a motor shaft. Background Technology

[0002] An electric motor is a drive component used to convert electrical energy into mechanical energy. Currently, commercially available motors include a stator assembly, rotor assembly, bracket, bearing, pressure ring, and annular oil reservoir. The rotor assembly is rotatably connected to the inner side of the stator assembly. The bracket is fixed to the end of the stator assembly. A groove is provided in the center of the inner bottom of the bracket. The lower part of the bearing is fitted into the groove and rotates within it. An annular cavity is provided on the inner side of the bracket above the groove. The outer edge of the pressure ring is riveted to the opening at the upper end of the annular cavity. Several circumferentially spaced claws are provided on the inner edge of the pressure ring. These claws grip the outer wall of the upper part of the bearing and press the bearing into the groove. The shaft of the rotor assembly passes through the bearing. The oil reservoir is embedded in the annular cavity located below the pressure ring, storing oil... The inner circumferential wall of the cotton is in contact with the outer circumferential wall of the bearing in the axial direction. In the above motor structure, when the shaft in the rotor assembly rotates relative to the support and pressure ring by the bearing, the lubricating oil absorbed in the oil-retaining cotton can lubricate the gap between the bearing and the support, as well as the gap between the bearing and the clamp. However, when the above motor is actually working, after the lubricating oil is coated onto the outer circumferential wall of the bearing by the oil-retaining cotton, the lubricating oil on the outer circumferential wall of the bearing will be thrown out with the rotation of the bearing. Moreover, the existing motor structure does not have a structure that can recover the lubricating oil, which will cause the lubricating oil to be consumed quickly. Over time, the bearing and the support, as well as the bearing and the pressure ring, will not be lubricated and will wear out quickly, which means that the motor has a short service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lubrication structure for a motor shaft that can effectively avoid wear between the bearing and the bracket, as well as between the bearing and the pressure ring, thereby improving the service life of the motor.

[0004] This utility model provides a lubrication structure for a motor shaft, including a stator assembly, a rotor assembly, a bracket, a bearing, a pressure ring, and an annular oil reservoir. The rotor assembly is rotatably connected to the inner side of the stator assembly, and the bracket is fixed to the end of the stator assembly. A groove is provided in the center of the inner bottom of the bracket, and the lower part of the bearing is fitted into the groove and rotatably engages with it. An annular cavity is provided on the inner side of the bracket above the groove, and the outer edge of the pressure ring is riveted to the opening at the upper end of the annular cavity. Several oil reservoirs are provided on the inner edge of the pressure ring. The bearing has circumferentially spaced grippers that clamp onto the outer wall of the upper part of the bearing and press the bearing into the groove. The rotor shaft of the rotor assembly passes through the bearing. The oil reservoir is embedded in an annular cavity located below the pressure ring. The inner circumferential wall of the oil reservoir is in contact with the outer circumferential wall of the bearing in the axial direction. The lubrication structure also includes an annular oil baffle. The oil baffle is fixed on a bracket located above the pressure ring. The upper part of the oil baffle covers the outside of the bearing and is clearance-fitted with the bearing. The upper end of the oil baffle is higher than the upper end of the bearing.

[0005] By adopting the above-described structure, this utility model, under the action of the oil baffle, when the lubricating oil located on the outer peripheral wall of the bearing is thrown out with the rotation of the bearing, the oil baffle can block the lubricating oil thrown out from the bearing, and the lubricating oil can flow back into the oil storage cotton through the inner wall of the oil baffle and the gap between the oil baffle and the pressure ring, so as to collect the lubricating oil and avoid the loss of lubricating oil. It can also ensure that the oil storage cotton continuously and reliably lubricates the gap between the bearing and the clamp and the gap between the bearing and the groove, thereby effectively avoiding wear between the bearing and the bracket and between the bearing and the pressure ring, thus improving the service life of the motor.

[0006] In one possible implementation, the oil baffle includes a horizontally shaped annular section, a connecting section in the same ring shape, and a constricted section in the same ring shape. The horizontally shaped section is fixedly mounted on a bracket located above the pressure ring. The connecting section extends from bottom to top and from the outside inward, with its lower end integrated with the inner edge of the horizontally shaped section. The constricted section gradually narrows inward from bottom to top, with its lower end integrated with the upper end of the connecting section. The upper end of the constricted section is higher than the upper end of the bearing. With this structure, after the horizontally shaped section is fixed to the bracket, it can reliably support the connecting section and the constricted section. The connecting section extends from bottom to top and from the outside to the inside, while the constricted section gradually narrows inward from bottom to top. The upper end of the constricted section is higher than the upper end of the bearing, which enables the connecting section and the constricted section to reliably block the lubricating oil thrown out from the bearing. After the lubricating oil is thrown onto the inner wall of the connecting section and the constricted section, the lubricating oil can flow back into the oil storage cotton along the inner wall of the oil baffle and through the gap between the oil baffle and the pressure ring, so as to collect the lubricating oil and avoid the loss of lubricating oil. It can also ensure that the oil storage cotton continuously and reliably lubricates the gap between the bearing and the clamp and the gap between the bearing and the groove.

[0007] In one possible implementation, an annular step is provided on the inner wall of the bracket located above the annular cavity, and a horizontal section is supported on the annular step, with the outer edge of the horizontal section tightly fitted with the inner wall of the annular step. With this structure, the annular step can reliably support the horizontal section, that is, the annular step can reliably support the oil baffle. And because the outer edge of the horizontal section is tightly fitted with the inner wall of the annular step, the horizontal section can be reliably assembled with the bracket, that is, the oil baffle can be reliably assembled with the bracket.

[0008] In one possible implementation, an annular rolled edge is provided at the outer edge of the horizontal section. The annular rolled edge extends from bottom to top and from the inside to the outside, and the outer edge of the upper end of the annular rolled edge is tightly fitted with the inner sidewall of the annular step. With this structure, the tight fit between the annular rolled edge and the sidewall of the annular step creates an interlocking structure, which further improves the reliability of the horizontal section and the bracket assembly, i.e., improves the reliability of the oil baffle and the bracket assembly. In addition, the tight fit between the annular rolled edge and the annular step improves the reliability of the seal between the horizontal section and the bracket, i.e., improves the sealing performance between the oil baffle and the bracket. Thus, when the motor is installed horizontally, the lubricating oil located inside the oil baffle can be prevented from leaking from the gap between the oil baffle and the bracket.

[0009] In one possible implementation, the bottom of the annular cavity is provided with an annular oil storage chamber, and the bottom of the outer edge of the oil storage cotton is provided with an annular protrusion, which abuts against the bottom of the oil storage chamber. Through the provision of the oil storage chamber, the oil storage chamber can better collect and store the lubricating oil from the oil baffle. And because the bottom of the outer edge of the oil storage cotton is provided with an annular protrusion, which abuts against the bottom of the oil storage chamber, the oil storage cotton can more reliably absorb the lubricating oil in the oil storage chamber under the action of the annular protrusion to realize the recycling of the lubricating oil. Attached Figure Description

[0010] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0011] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle. Detailed Implementation

[0012] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0013] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0014] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] See Figure 1-2 As shown in the embodiment of this application, a lubrication structure for a motor shaft is disclosed, including a stator assembly 1, a rotor assembly 2, a bracket 3, a bearing 4, a pressure ring 5, and an annular oil reservoir 6. The rotor assembly 2 is rotatably connected to the inner side of the stator assembly 1. The bracket 3 is fixed to the end of the stator assembly 1. A groove 31 is provided in the middle of the inner bottom of the bracket 3. The lower part of the bearing 4 is fitted into the groove 31 and rotates with the groove 31. An annular cavity 32 is provided on the inner side of the bracket 3 above the groove 31. The outer edge of the pressure ring 5 is riveted to the opening at the upper end of the annular cavity 32. Several... Several circumferentially spaced grippers 51 clamp the upper outer wall of the bearing 4 and press the bearing 4 into the groove 31. The rotor shaft 21 in the rotor assembly 2 passes through the bearing 4. The oil storage cotton 6 is embedded in the annular cavity 32 located below the pressure ring 5. The inner peripheral wall of the oil storage cotton 6 is in contact with the outer peripheral wall of the bearing 4 in the axial direction. The lubrication structure also includes an annular oil baffle 7. The oil baffle 7 is fixed on the bracket 3 located above the pressure ring 5. The upper part of the oil baffle 7 covers the outside of the bearing 4 and is clearance-fitted with the bearing 4. The upper end of the oil baffle 7 is higher than the upper end of the bearing 4.

[0017] The oil baffle 7 includes a horizontal section 71 in the shape of an annular ring, a connecting section 72 in the shape of an annular ring, and a constricted section 73 in the shape of an annular ring. The horizontal section 71 is fixedly embedded in the bracket 3 located above the pressure ring 5. The connecting section 72 extends from bottom to top and from the outside to the inside, with its lower end connected to the inner edge of the horizontal section 71. The constricted section 73 gradually narrows inward from bottom to top, with its lower end connected to the upper end of the connecting section 72. The upper end of the constricted section 73 is higher than the upper end of the bearing 4. With this structure, after the horizontal section is fixedly embedded in the bracket, it can reliably protect the connecting section and the constricted section. The support is provided by the connecting section extending from bottom to top and from the outside to the inside, while the constricted section gradually narrows inward from bottom to top. The upper end of the constricted section is higher than the upper end of the bearing, which allows the connecting section and the constricted section to reliably block the lubricating oil thrown out from the bearing. After the lubricating oil is thrown onto the inner wall of the connecting section and the constricted section, it can flow back into the oil storage cotton along the inner wall of the oil baffle and through the gap between the oil baffle and the pressure ring, thereby collecting the lubricating oil and avoiding the loss of lubricating oil. It also ensures that the oil storage cotton continuously and reliably lubricates the gap between the bearing and the clamp, as well as the gap between the bearing and the groove.

[0018] An annular step 33 is provided on the inner wall of the bracket 3 located above the annular cavity 32. The horizontal section 71 is supported on the annular step 33, and the outer edge of the horizontal section 71 is tightly fitted with the inner wall of the annular step 33. With this structure, the annular step can reliably support the horizontal section, that is, the annular step can reliably support the oil baffle. And because the outer edge of the horizontal section is tightly fitted with the inner wall of the annular step, the horizontal section can be reliably assembled with the bracket, that is, the oil baffle can be reliably assembled with the bracket.

[0019] An annular rolled edge 74 is provided at the outer edge of the horizontal section 71. The annular rolled edge 74 extends from bottom to top and from the inside to the outside. The outer edge of the upper end of the annular rolled edge 74 is tightly fitted with the inner sidewall of the annular step 33. With this structure, the annular rolled edge and the sidewall of the annular step can form an inverted structure, which can further improve the reliability of the horizontal section and the bracket after assembly, that is, improve the reliability of the oil baffle and the bracket after assembly. In addition, the tight fit between the annular rolled edge and the annular step can improve the reliability of the seal between the horizontal section and the bracket, that is, improve the sealing performance between the oil baffle and the bracket. Thus, when the motor is installed horizontally, the lubricating oil located inside the oil baffle can be prevented from leaking from the gap between the oil baffle and the bracket.

[0020] The bottom of the annular cavity 32 is provided with an annular oil storage cavity 34, and the bottom of the outer edge of the oil storage cotton 6 is provided with an annular protrusion 61, which abuts against the bottom of the oil storage cavity 34. Through the provision of the oil storage cavity, the oil storage cavity can better collect and store the lubricating oil from the oil baffle. And because the bottom of the outer edge of the oil storage cotton is provided with an annular protrusion, which abuts against the bottom of the oil storage cavity, the oil storage cotton can more reliably absorb the lubricating oil in the oil storage cavity under the action of the annular protrusion to realize the recycling of the lubricating oil.

[0021] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A lubrication structure for a motor shaft, comprising a stator assembly (1), a rotor assembly (2), a bracket (3), a bearing (4), a pressure ring (5), and an annular oil reservoir (6); the rotor assembly (2) is rotatably connected to the inner side of the stator assembly (1), the bracket (3) is fixed to the end of the stator assembly (1), a groove (31) is provided in the middle of the inner bottom of the bracket (3), the lower part of the bearing (4) is fitted into the groove (31) and rotatably engages with the groove (31), and an annular cavity (32) is provided on the inner side of the bracket (3) above the groove (31). The outer edge of the pressure ring (5) is riveted to the opening at the upper end of the annular cavity (32). Several circumferentially spaced claws (51) are provided on the inner edge of the pressure ring (5). These claws (51) grip the outer wall of the upper part of the bearing (4) and press the bearing (4) into the groove (31). The rotating shaft (21) of the rotor assembly (2) passes through the bearing (4). The oil-retaining cotton (6) is embedded in the annular cavity (32) located below the pressure ring (5). The inner circumferential wall of the oil-retaining cotton (6) is in contact with the outer circumferential wall of the bearing (4) in the axial direction. The characteristic feature is that: The lubrication structure also includes an annular oil baffle (7); the oil baffle (7) is embedded in a bracket (3) located above the pressure ring (5), the upper part of the oil baffle (7) covers the outside of the bearing (4) and is clearance-fitted with the bearing (4), and the upper end of the oil baffle (7) is higher than the upper end of the bearing (4).

2. The lubricating structure of the motor shaft according to claim 1, characterized by: The oil baffle (7) includes a ring-shaped horizontal section (71), a ring-shaped connecting section (72), and a ring-shaped constricted section (73); the horizontal section (71) is fixed on the bracket (3) located above the pressure ring (5); the connecting section (72) extends from bottom to top and from outside to inside; the lower end of the connecting section (72) is connected to the inner edge of the horizontal section (71); the constricted section (73) gradually shrinks inward from bottom to top; the lower end of the constricted section (73) is connected to the upper end of the connecting section (72); and the upper end of the constricted section (73) is higher than the upper end of the bearing (4).

3. The lubricating structure of the motor shaft according to claim 2, characterized by: An annular step (33) is provided on the inner wall of the bracket (3) located above the annular cavity (32). The horizontal section (71) is supported on the annular step (33), and the outer edge of the horizontal section (71) is tightly fitted with the inner wall of the annular step (33).

4. The lubricating structure of the motor shaft according to claim 3, characterized by: An annular rolled edge (74) is provided at the outer edge of the horizontal section (71). The annular rolled edge (74) extends from bottom to top and from inside to outside. The outer edge of the upper end of the annular rolled edge (74) is tightly fitted with the inner sidewall of the annular step (33).

5. A lubricating arrangement for an electric machine shaft according to any one of claims 1-4, characterized in that: The bottom of the annular cavity (32) is provided with an annular oil storage cavity (34), and the bottom of the outer edge of the oil storage cotton (6) is provided with an annular protrusion (61), which abuts against the bottom of the oil storage cavity (34).

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