Mud-proof motor sealing structure

Abstract

The utility model discloses an anti-mud motor sealing structure, which relates to the technical field of motors and comprises an end cover, a motor shaft and a cover plate, the motor shaft penetrates through the center of the end cover and is in running fit with the end cover, the cover plate is fixedly connected to the outer side of the end cover, a framework oil seal is fixedly arranged on the inner circumferential wall of the cover plate, and the framework oil seal is tightly abutted against the motor shaft; a waterproof cover is fixedly arranged on the motor shaft, the outer edge of the waterproof cover extends to the outer wall of the cover plate, and the waterproof cover does not make contact with the cover plate. According to the scheme, the first sealing cavity and the second sealing cavity are arranged from outside to inside, two sealing structures are formed, and a large amount of slurry is prevented from entering; by injecting grease into the accommodating cavity between the axial surface oil seal and the framework oil seal, the service life of the axial surface oil seal and the framework oil seal can be prolonged, and residual silt in the second sealing cavity can be prevented from entering the position of the framework oil seal, so that external mud is prevented from entering the motor, and the sealing effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a motor sealing structure of mud prevention belongs to motor technical field. BACKGROUND

[0002] At present, the bearing sealing of motor shaft extension part mostly adopts contact type lip-shaped sealing ring (hereinafter referred to as skeleton oil seal). When the motor works, the rotating shaft rotates, and the outer circle of the rotating shaft and the contact surface of the lip of the skeleton oil seal produce rotary friction. Long-time contact friction can cause the lip to wear, thereby affecting the sealing effect. In addition, when the motor works in the mud environment for a long time, the water in the mud can evaporate into soil, and the soil can enter the small sand in the mutual friction between the lip and the rotating shaft, further accelerating the wear of the oil seal. For the driving motor of the working vehicle in the mud environment, the mud can be attached to the surface of the motor and the sealing place for a long time, which has a great influence on the service life of the oil seal of the motor, so a new scheme is needed to solve this problem. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art and provides a motor sealing structure of mud prevention.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a motor sealing structure of mud prevention, which comprises an end cover, a motor shaft and a cover plate. The motor shaft passes through the center of the end cover and is rotationally connected with the end cover. The cover plate is fixedly connected to the outer side of the end cover. A skeleton oil seal is fixedly arranged on the inner circumferential wall of the cover plate and tightly abuts against the motor shaft. A waterproof cover is fixedly arranged on the motor shaft. The outer edge of the waterproof cover extends to the outer wall of the cover plate, and the waterproof cover does not contact the cover plate. A first sealing cavity is formed between the waterproof cover and the cover plate. A water baffle is also fixedly arranged on the motor shaft. The water baffle is located on the inner side of the waterproof cover, and a second sealing cavity is formed between the water baffle and the cover plate. An axial surface oil seal is fixedly arranged on the inner side wall of the water baffle. The axial surface oil seal tightly abuts against the cover plate, and a containing cavity is formed between the axial surface oil seal and the skeleton oil seal. The containing cavity is filled with oil.

[0005] Preferably, a water baffle groove is formed in the outer circumferential wall of the cover plate.

[0006] Preferably, a water drainage groove is formed in the lower side of the cover plate.

[0007] Preferably, the skeleton oil seal has a plurality of sealing lips, and the skeleton oil seal tightly abuts against the motor shaft through the plurality of sealing lips.

[0008] Preferably, a bearing is arranged on the end cover, and the motor shaft is rotationally connected with the end cover through the bearing.

[0009] Preferably, the skeleton oil seal is made of polytetrafluoroethylene.

[0010] Preferably, the shaft surface oil seal is made of fluororubber.

[0011] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0012] 1、The utility model discloses a first sealing cavity and second sealing cavity from outside to inside are set up, form two sealing structures, block a large number of slurry to enter, inject grease in the accommodating cavity between the shaft surface oil seal and the skeleton oil seal, not only can prolong the service life of the shaft surface oil seal and the skeleton oil seal, but also can block the residual silt in the second sealing cavity to enter the position of the skeleton oil seal, thereby preventing the outside slurry from entering the motor interior, guaranteeing the sealing effect.

[0013] 2、The water baffle on the cover plate can block the outside slurry from directly entering the first sealing cavity, avoids a large amount of slurry from gushing, and the drain groove can drain the slurry entering the first sealing cavity to prevent the slurry from accumulating. DRAWINGS

[0014] The utility model technical scheme will be further explained below in combination with the drawings:

[0015] ATTACHED Figure 1 It is the structural schematic diagram of the motor sealing structure of preventing slurry of the utility model;

[0016] ATTACHED Figure 2 It is the attached Figure 1 It is the enlarged view of A in the attached

[0017] ATTACHED Figure 3 It is the attached Figure 1 It is the enlarged view of B in the attached.

[0018] In the drawing: 1, end cover;2, motor shaft;3, cover plate;4, skeleton oil seal;5, waterproof cover;6, first sealing cavity;7, water baffle;8, second sealing cavity;9, shaft surface oil seal;10, accommodating cavity;11, water baffle groove;12, drain groove;13, sealing lip;14, bearing. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0020] As shown in the attached Figures 1-3 The utility model discloses a motor sealing structure of preventing slurry, containing end cover 1, motor shaft 2 and cover plate 3, and motor shaft 2 passes through the center of end cover 1 and is rotationally connected with end cover 1, wherein, end cover 1 is provided with bearing 14, and motor shaft 2 is rotationally connected with end cover 1 through the bearing 14, and cover plate 3 is connected and fixed on the outside of end cover 1.

[0021] The inner peripheral wall of the cover plate 3 is fixedly provided with a skeleton oil seal 4, which is in close abutment with the motor shaft 2; in the embodiment, the skeleton oil seal 4 is made of polytetrafluoroethylene, and the skeleton oil seal 4 has a plurality of sealing lips 13, which are in close abutment with the motor shaft 2, so as to ensure the sealing effect between the skeleton oil seal 4 and the motor shaft 2.

[0022] The motor shaft 2 is fixedly provided with a waterproof cover 5, wherein the longitudinal section of the waterproof cover 5 is in the shape of U, the outer edge of the waterproof cover 5 extends to the outer wall of the cover plate 3, and the waterproof cover 5 is not in contact with the cover plate 3, and a first sealing cavity 6 is formed between the waterproof cover 5 and the cover plate 3; the outer peripheral wall of the cover plate 3 is provided with a water blocking groove 11, and the lower side of the cover plate 3 is provided with a water draining groove 12.

[0023] In operation, the water blocking groove 11 on the outer wall of the cover plate 3 can block the mud from directly entering the first sealing cavity 6, and the first sealing cavity 6 can block most of the mud from entering the waterproof cover 5, thereby forming a first sealing structure; when a part of the mud enters the first sealing cavity 6 through the gap between the waterproof cover 5 and the cover plate 3, the part of the mud falls to the water draining groove 12 on the lower side of the cover plate 3 under the action of its own gravity, and most of the mud in the first sealing cavity 6 can be drained through the water draining groove 12, so as to avoid the accumulation of mud in the first sealing cavity 6.

[0024] The motor shaft 2 is also fixedly provided with a water blocking plate 7, which is located on the inner side of the waterproof cover 5, and a second sealing cavity 8 is formed between the water blocking plate 7 and the cover plate 3, thereby forming a second sealing structure; the inner side wall of the water blocking plate 7 is fixedly provided with a shaft surface oil seal 9, which is in close abutment with the cover plate 3 to form a sealing surface; in the embodiment, the shaft surface oil seal 9 is made of fluororubber, and a containing cavity 10 is formed between the shaft surface oil seal 9 and the skeleton oil seal 4, which is filled with oil.

[0025] In operation, the second sealing cavity 8 formed between the water blocking plate 7 and the cover plate 3 can further block the mud in the first sealing cavity 6 from entering the water blocking plate 7, and only a small amount of mud enters the baffle after being filtered by the two sealing structures, and the sealing surface formed by the shaft surface oil seal 9 and the cover plate 3 can block the sand from entering the containing cavity 10, and the oil filled in the containing cavity 10 can not only increase the service life of the shaft surface oil seal 9 and the skeleton oil seal 4 on both sides, but also block the sand deposited in the second sealing cavity 8 from entering the skeleton oil seal 4, thereby further ensuring the sealing effect.

[0026] In conclusion, the utility model discloses a first sealing cavity 6 and second sealing cavity 8 are set from outside to inside, form two sealing structures to block a large amount of slurry from entering, inject grease in the containing cavity 10 between the shaft surface oil seal 9 and the skeleton oil seal 4, not only can prolong the service life of the shaft surface oil seal 9 and the skeleton oil seal 4, but also can block the residual silt in the second sealing cavity 8 from entering the position of the skeleton oil seal 4, thereby preventing the outside slurry from entering the motor interior, and guaranteeing the sealing effect.

[0027] Meanwhile, the water blocking groove 11 on the cover plate 3 can block the outside slurry from directly entering the first sealing cavity 6, and the water drainage groove 12 can drain the slurry entering the first sealing cavity 6, so as to prevent the slurry from accumulating.

[0028] The above is only the specific application example of the utility model, and does not constitute any limitation on the protection scope of the utility model; the technical solutions formed by equivalent transformation or equivalent replacement all fall within the protection scope of the utility model.

Claims

1. A motor sealing structure to prevent mud slurry, characterized in that: The device includes an end cap (1), a motor shaft (2), and a cover plate (3). The motor shaft (2) passes through the center of the end cap (1) and rotates with it. The cover plate (3) is fixedly connected to the outside of the end cap (1). A skeleton oil seal (4) is fixedly installed on the inner circumferential wall of the cover plate (3), and the skeleton oil seal (4) abuts tightly against the motor shaft (2). A waterproof cover (5) is fixedly installed on the motor shaft (2), and the outer edge of the waterproof cover (5) extends to the outer wall of the cover plate (3), and the waterproof cover (5) does not contact the cover plate (3), thus providing waterproof protection. A first sealing cavity (6) is formed between the cover (5) and the cover plate (3); a water baffle (7) is also fixedly installed on the motor shaft (2), the water baffle (7) is located inside the waterproof cover (5), and a second sealing cavity (8) is formed between the water baffle (7) and the cover plate (3); a shaft surface oil seal (9) is fixedly installed on the inner wall of the water baffle (7), the shaft surface oil seal (9) is tightly abutted against the cover plate (3), and a receiving cavity (10) is formed between the shaft surface oil seal (9) and the skeleton oil seal (4), and the receiving cavity (10) is used to fill grease.

2. The motor sealing structure for preventing mud slurry according to claim 1, characterized in that: A water-blocking groove (11) is provided on the outer peripheral wall of the cover plate (3).

3. The motor sealing structure for preventing mud slurry according to claim 1, characterized in that: A drainage groove (12) is provided on the lower side of the cover plate (3).

4. The motor sealing structure for preventing mud slurry according to claim 1, characterized in that: The skeleton oil seal (4) has multiple sealing lips (13), and the skeleton oil seal (4) is tightly abutted against the motor shaft (2) through the multiple sealing lips (13).

5. The motor sealing structure for preventing mud slurry according to claim 1, characterized in that: The end cover (1) is provided with a bearing (14), and the motor shaft (2) and the end cover (1) are rotatably connected through the bearing (14).

6. A motor sealing structure for preventing mud slurry according to any one of claims 1-5, characterized in that: The skeleton oil seal (4) is made of polytetrafluoroethylene.

7. A motor sealing structure for preventing mud slurry according to any one of claims 1-5, characterized in that: The shaft oil seal (9) is made of fluororubber.

Images