Motor bearing sealing structure

Abstract

The utility model provides a motor bearing sealing structure which is characterized in that a step is arranged on a motor rotating shaft, a bearing is sleeved on the outer side of the motor rotating shaft, a bracket is sleeved on the outer side of the bearing, and the inner side wall of the bracket is in interference fit with the outer ring of the bearing; the inner side sealing structure is arranged on the motor rotating shaft in a sleeving mode and located on the side, close to the motor shell, of the bearing; the outer side sealing structure is arranged on the motor rotating shaft in a sleeving mode and located on the side, away from the inner side sealing structure, of the bearing; the outer oil shield is arranged on the motor rotating shaft in a sleeving mode, one side of the outer oil shield is arranged on the side, away from the inner side sealing structure, of the outer side sealing structure in a clamped mode, the outer side sealing structure is modified into a labyrinth type sealing structure, and a heavy outer oil shield seal is added, so that the sealing capacity is improved, and in actual use, the motor rotating shaft drives the bearing inner ring, the inner oil shield, the labyrinth oil shield and the outer oil shield to rotate; the added outer oil shield is located on the outermost side of the bearing, rainwater falling on the outer oil shield can be thrown away, the drainage effect is achieved, and the phenomenon that water enters the outside is prevented.

Description

Technical Field

[0001] The utility model relates to the field of motor design, in particular to the technical field of motor waterproofing and oil leakage prevention, and specifically relates to a motor bearing sealing structure. Background Art

[0002] According to customer feedback, outdoor motors have the following problems:

[0003] 1. The problem of rainwater entering the bearing group;

[0004] 2. The on-site manufacturing of the motor feedback showed that there was oil leakage in the bearing chamber, and the oil leakage caused the bearing to become stuck or burned, resulting in the need to replace the entire bearing.

[0005] After review by the designers, it was found that the external sealing structure of the current bearing group was simple and the sealing effect was poor. In order to avoid or reduce the occurrence of such incidents, it is now necessary to modify the external sealing structure of the bearing group. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a motor bearing sealing structure for solving the difficulties of the prior art.

[0007] To achieve the above-mentioned and other related purposes, the present invention provides a motor bearing sealing structure, comprising:

[0008] A motor shaft 1 is provided with a step 11, a bearing 2 is sleeved on the outer side of the motor shaft 1, and the inner ring of the bearing 2 is in interference fit with the motor shaft 1;

[0009] The bracket 3 is sleeved on the outside of the bearing 2, and the inner wall of the bracket 3 is interference fit with the outer ring of the bearing 2. A first oil delivery channel 4 is provided on one side of the bracket 3;

[0010] An inner sealing structure 5 is sleeved on the motor shaft 1 and is located on a side of the bearing 2 close to the motor housing;

[0011] An outer sealing structure 6 is sleeved on the motor shaft 1 and is located on a side of the bearing 2 away from the inner sealing structure 5;

[0012] The outer oil stopper 7 is sleeved on the motor shaft 1 , and one side of the outer oil stopper 7 is clamped on the side of the outer sealing structure 6 away from the inner sealing structure 5 .

[0013] According to a preferred embodiment, the inner sealing structure 5 includes:

[0014] An inner end cover 51 is sleeved on the motor shaft 1 on the side where the bearing 2 is close to the motor housing. The side of the inner end cover 51 close to the bearing 2 abuts against the bracket 3. An inner oil groove 52 is provided on the side of the inner end cover 51 close to the bearing 2. The inner oil groove 52 is communicated with the No. 1 oil delivery channel 4 and the bearing 2 respectively. An oil retaining groove is provided on the side of the inner end cover 51 close to the bearing 2 on the side where the inner oil groove 52 is close to the motor shaft 1. A No. 1 sealing groove is provided on the inner side wall of the inner end cover 51 at equal intervals. A No. 1 sealing ring 53 is clamped in the No. 1 sealing groove.

[0015] The inner oil stopper 54 is an interference sleeve arranged on the outside of the motor shaft 1. The inner oil stopper 54 is located between the bearing 2 and the inner end cover 51. One side of the inner oil stopper 54 is clamped between the inner ring of the bearing 2 and the step 11, and the other side of the inner oil stopper 54 is clamped in the oil retaining groove.

[0016] According to a preferred embodiment, the outer sealing structure 6 includes:

[0017] A labyrinth oil stop 61 is sleeved on the side of the motor shaft 1 on the side of the bearing 2 away from the inner end cover 51. One side of the labyrinth oil stop 61 abuts against the inner ring of the bearing 2. A hexagonal bolt 62 is passed through the other side of the labyrinth oil stop 61. The bottom of the hexagonal bolt 62 abuts against the motor shaft 1. An outer oil groove 63 is defined on the outer wall of the other side of the labyrinth oil stop 61. An end cover slot 64 is defined on the other side of the labyrinth oil stop 61 away from the outer oil groove 63 and closer to the motor shaft 1.

[0018] The outer end cover 65, the side of the outer end cover 65 close to the motor shaft 1 is clamped in the end cover clamping slot 64, the other side of the outer end cover 65 is clamped between the labyrinth oil block 61 and the bracket 3, the other side of the outer end cover 65 is connected to the bracket 3 by bolts, an oil delivery gap is provided between the outer end cover 65 and the labyrinth oil block 61, and a second oil delivery channel 66 is opened on the side of the outer end cover 65 close to the bracket 3, and the second oil delivery channel 66 is communicated with the oil delivery gap and the outer oil groove 63.

[0019] According to the preferred embodiment, the outer oil stop 7 is clamped between the labyrinth oil stop 61 and the outer end cover 65 on the side close to the bearing 2, and the other side of the outer oil stop 7 is sleeved on the motor shaft 1. A cross flat head bolt 71 is passed through the other side of the outer oil stop 7, and the outer oil stop 7 is connected to the labyrinth oil stop 61 through the cross flat head bolt 71.

[0020] The utility model adopts a motor shaft, a bracket, a transmission device, an inner sealing structure, an outer sealing structure and an outer oil gear, modifies the outer sealing structure into a labyrinth sealing structure and adds an outer oil gear seal to improve the sealing ability. During actual use, the motor shaft drives the inner ring of the bearing, the inner oil gear, the labyrinth oil gear and the outer oil gear to rotate. The added outer oil gear is located at the outermost side of the bearing and can throw off rainwater falling thereon, thereby playing a drainage role and preventing external water from entering.

[0021] The following will describe in more detail the best embodiments of the present invention in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic cross-sectional view of the present invention;

[0023] Figure 2 Shown is a schematic cross-sectional view of a labyrinth oil gear in the present invention;

[0024] Figure 3 Shown is a schematic cross-sectional view of the outer oil gear in the present invention;

[0025] Description of labels

[0026] 1. Motor shaft; 11. Step;

[0027] 2. Bearing; 3. Bracket; 4. No. 1 oil channel;

[0028] 5. Inner sealing structure; 51. Inner end cover; 52. Inner oil tank; 53. No. 1 sealing ring; 54. Inner oil baffle;

[0029] 6. Outer sealing structure; 61. Labyrinth oil stop; 62. Hexagonal bolt; 63. Outer oil tank; 64. End cover slot; 65. Outer end cover; 66. No. 2 oil transfer channel;

[0030] 7. External oil stop; 71. Cross flat head bolt; DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not necessarily indicate a quantity limitation. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] The present invention proposes a motor bearing sealing structure for use in the motor bearing sealing design process. The present invention does not limit the type of motor bearings, but the inner sealing structure 5, the outer sealing structure 6 and the outer oil stop 7 are particularly suitable for improving the sealing, waterproof and oil leakage prevention performance of the bearings in the motor.

[0035] In general, the motor bearing sealing structure proposed in the present invention mainly includes: an inner sealing structure 5, an outer sealing structure 6 and an outer oil stop 7, wherein, you can refer to Figure 1 , which shows the arrangement relationship of the inner sealing structure 5, the outer sealing structure 6 and the outer oil stop 7.

[0036] The motor bearing sealing structure proposed in the present invention modifies the outer sealing structure 6 into a labyrinth sealing structure and adds an outer oil block 7 for sealing, thereby improving the sealing ability. In actual use, the motor shaft 1 drives the inner ring of the bearing 2, the inner oil block 54, the labyrinth oil block 61 and the outer oil block 7 to rotate. The additional outer oil block 7 is located at the outermost side of the bearing 2 and can throw off rainwater falling thereon, thereby playing a drainage role.

[0037] A step 11 is provided on the above-mentioned motor shaft 1, and a bearing 2 is sleeved on the outside of the motor shaft 1. The inner ring of the bearing 2 is in interference fit with the motor shaft 1, and a bracket 3 is sleeved on the outside of the bearing 2. The inner wall of the bracket 3 is in interference fit with the outer ring of the bearing 2, and a No. 1 oil delivery channel 4 is provided on one side of the bracket 3.

[0038] The inner sealing structure 5 is sleeved on the motor shaft 1. The inner sealing structure 5 is located on the side of the bearing 2 close to the motor housing. The inner sealing structure 5 includes: an inner end cover 51 and an inner oil baffle 54. The inner end cover 51 is sleeved on the side of the motor shaft 1 close to the motor housing at the bearing 2. The side of the inner end cover 51 close to the bearing 2 is against the bracket 3. The side of the inner end cover 51 close to the bearing 2 is provided with an inner oil groove 52. The inner oil groove 52 is communicated with the No. 1 oil delivery channel 4 and the bearing 2 respectively. The side of the inner end cover 51 close to the bearing 2 An oil retaining groove is provided on the side of the inner oil groove 52 close to the motor shaft 1, and a No. 1 sealing groove is provided on the inner wall of the inner end cover 51 at equal intervals. A No. 1 sealing ring 53 is clamped in the No. 1 sealing groove, and an inner oil stopper 54 is provided on the outer side of the motor shaft 1 through an interference sleeve. The inner oil stopper 54 is located between the bearing 2 and the inner end cover 51, and one side of the inner oil stopper 54 is clamped between the inner ring of the bearing 2 and the step 11, and the other side of the inner oil stopper 54 is clamped in the oil retaining groove. The inner sealing structure 5 is arranged in the motor casing, adopting a more traditional sealing structure to reduce costs.

[0039] The outer sealing structure 6 is sleeved on the motor shaft 1, and the outer sealing structure 6 is located on the side of the bearing 2 away from the inner sealing structure 5. The outer sealing structure 6 includes: a labyrinth oil block 61 and an outer end cover 65, wherein the labyrinth oil block 61 is sleeved on the motor shaft 1 on the side of the bearing 2 away from the inner end cover 51, one side of the labyrinth oil block 61 is against the inner ring of the bearing 2, and the other side of the labyrinth oil block 61 is penetrated by a hexagonal bolt 62, and the bottom of the hexagonal bolt 62 is against the motor shaft 1, and the outer wall of the other side of the labyrinth oil block 61 is provided with an outer oil groove 63, and the other side of the labyrinth oil block 61 is away from the outer oil groove 63. An end cover slot 64 is provided in the direction near the motor shaft 1, and the side of the outer end cover 65 close to the motor shaft 1 is clamped in the end cover slot 64, and the other side of the outer end cover 65 is clamped between the labyrinth oil block 61 and the bracket 3. The other side of the outer end cover 65 is connected to the bracket 3 by bolts, and an oil delivery gap is provided between the outer end cover 65 and the labyrinth oil block 61. A No. 2 oil delivery channel 66 is provided on the side of the outer end cover 65 close to the bracket 3, and the No. 2 oil delivery channel 66 is communicated with the oil delivery gap and the outer oil groove 63. The outer sealing structure 6 is provided on the outside, and the labyrinth sealing structure is designed to improve the oil leakage prevention performance.

[0040] The above-mentioned outer oil stopper 7 is sleeved on the motor shaft 1, and one side of the outer oil stopper 7 is clamped on the side of the outer sealing structure 6 away from the inner sealing structure 5, and the side of the outer oil stopper 7 close to the bearing 2 is clamped between the labyrinth oil stopper 61 and the outer end cover 65. The other side of the outer oil stopper 7 is sleeved on the motor shaft 1, and a cross flat head bolt 71 is passed through the other side of the outer oil stopper 7. The outer oil stopper 7 is connected to the labyrinth oil stopper 61 through the cross flat head bolt 71. The outer oil stopper 7 improves the sealing performance of the outer sealing structure 6 and prevents water from entering from the outside.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A motor bearing sealing structure, characterized in that: include: A motor shaft (1), wherein a step (11) is provided on the motor shaft (1), a bearing (2) is sleeved on the outer side of the motor shaft (1), and an inner ring of the bearing (2) is in interference fit with the motor shaft (1); A bracket (3), wherein the bracket (3) is sleeved on the outside of the bearing (2), the inner side wall of the bracket (3) and the outer ring of the bearing (2) are in interference fit, and a first oil delivery channel (4) is provided on one side of the bracket (3); An inner sealing structure (5), wherein the inner sealing structure (5) is sleeved on the motor shaft (1), and the inner sealing structure (5) is located on a side of the bearing (2) close to the motor housing; An outer sealing structure (6), wherein the outer sealing structure (6) is sleeved on the motor shaft (1), and the outer sealing structure (6) is located on a side of the bearing (2) away from the inner sealing structure (5); An outer oil stopper (7) is sleeved on the motor shaft (1), and one side of the outer oil stopper (7) is clamped on a side of the outer sealing structure (6) away from the inner sealing structure (5).

2. The motor bearing sealing structure according to claim 1, characterized in that: The inner sealing structure (5) comprises: An inner end cover (51), the inner end cover (51) is sleeved on the motor shaft (1) and located on the side of the bearing (2) close to the motor housing, the side of the inner end cover (51) close to the bearing (2) abuts against the bracket (3), an inner oil groove (52) is provided on the side of the inner end cover (51) close to the bearing (2), the inner oil groove (52) is communicated with the No. 1 oil delivery channel (4) and the bearing (2) respectively, an oil retaining groove is provided on the side of the inner end cover (51) close to the bearing (2) and located on the side of the inner oil groove (52) close to the motor shaft (1), a No. 1 sealing groove is provided on the inner side wall of the inner end cover (51) at equal intervals, and a No. 1 sealing ring (53) is clamped in the No. 1 sealing groove; An inner oil stopper (54) is provided in an interference sleeve on the outside of the motor shaft (1). The inner oil stopper (54) is located between the bearing (2) and the inner end cover (51). One side of the inner oil stopper (54) is clamped between the inner ring of the bearing (2) and the step (11), and the other side of the inner oil stopper (54) is clamped in the oil retaining groove.

3. The motor bearing sealing structure according to claim 2, characterized in that: The outer sealing structure (6) comprises: A labyrinth oil stop (61), wherein the labyrinth oil stop (61) is sleeved on the motor shaft (1) and is located on a side of the bearing (2) away from the inner end cover (51), one side of the labyrinth oil stop (61) abuts against the inner ring of the bearing (2), the other side of the labyrinth oil stop (61) is penetrated by a hexagonal bolt (62), the bottom of the hexagonal bolt (62) abuts against the motor shaft (1), an outer oil groove (63) is provided on the outer wall of the other side of the labyrinth oil stop (61), and an end cover slot (64) is provided on the other side of the labyrinth oil stop (61) away from the outer oil groove (63) and close to the motor shaft (1); An outer end cover (65), one side of the outer end cover (65) close to the motor shaft (1) is clamped in the end cover clamping groove (64), the other side of the outer end cover (65) is clamped between the labyrinth oil block (61) and the bracket (3), the other side of the outer end cover (65) is connected to the bracket (3) by bolts, an oil delivery gap is provided between the outer end cover (65) and the labyrinth oil block (61), and a second oil delivery channel (66) is opened on the side of the outer end cover (65) close to the bracket (3), and the second oil delivery channel (66) is communicated with the oil delivery gap and the outer oil groove (63).

4. The motor bearing sealing structure according to claim 3, characterized in that: The outer oil stop (7) is clamped between the labyrinth oil stop (61) and the outer end cover (65) on one side close to the bearing (2), and the other side of the outer oil stop (7) is sleeved on the motor shaft (1). A cross flat head bolt (71) is passed through the other side of the outer oil stop (7), and the outer oil stop (7) is connected to the labyrinth oil stop (61) through the cross flat head bolt (71).

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