A low-wear motor end cover

Abstract

The present invention relates to the technical field of motor end covers, and specifically to a low-wear motor end cover, including an end cover body, a protective cover, an oil storage cavity and a one-way oil return pipe extending into the oil storage cavity, the one-way oil return pipe is slidably connected to the end cover body, and a limit guide ring is provided on the one-way oil return pipe; and a fixed ring movably mounted on the protective cover, a smear ring is rotatably mounted on the fixed ring, a plurality of expansion pieces are provided on the inner wall of the smear ring close to the motor shaft, and a plurality of guide strips are provided on the outer wall of the smear ring close to the limit guide ring to guide the reciprocating movement of the fixed ring to increase the pressure in the oil storage cavity; a sealing member detachably connected to the end cover body, a waste oil cavity is provided on one side of the sealing member close to the end cover body, an oil pumping ring is provided on the sealing member, and an oil pumping hole connected to the one-way oil return pipe is provided on the oil pumping ring. The present invention can prevent excessive local friction, make lubrication more uniform, reduce wear of the motor end cover, improve the utilization efficiency of lubricating oil, reduce maintenance frequency, and reduce labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of motor end covers, and in particular to a low-wear motor end cover. Background Art

[0002] Motor end cover: It is the cover of the motor housing. It is generally divided into a front cover and a rear cover, which are used to fix and support the motor shaft. Generally, a motor sleeve is provided in the middle to pass the motor shaft. Poor lubrication between the motor end cover and the bearing or other rotating parts is one of the main causes of wear. If the lubricant is insufficient, contaminated or an inappropriate lubricant is used, it will increase friction and cause wear of the end cover.

[0003] At present, when lubricating the motor end cover, the motor end cover is usually lubricated by directly applying lubricating oil between the bearing and the bearing sleeve.

[0004] It is difficult to ensure uniform distribution of lubricating oil by manual application. Uneven distribution of lubricating oil will lead to insufficient lubrication in some areas and excessive lubrication in other areas. The areas with insufficient lubrication are prone to increased friction, which in turn leads to wear of the end cover. On the other hand, after long-term use, a certain amount of oil stains will accumulate inside the motor. Since the current lubrication method cannot automatically remove these oil stains, they will continue to accumulate and affect the normal operation of the motor. The accumulation of oil stains will reduce the lubrication effect and increase friction and wear. Therefore, regular maintenance by professionals is required, which increases the labor intensity of the staff. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a low-wear motor end cover, which can effectively solve the problems of uneven lubrication, inability to automatically clean dirt, and high labor intensity in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a low-wear motor end cover, comprising an end cover body, and further comprising:

[0008] A protective cover detachably connected to the end cover body, the protective cover is provided with an oil storage cavity and a one-way oil return pipe extending into the oil storage cavity, the one-way oil return pipe is slidably connected to the end cover body, and the one-way oil return pipe is provided with a limiting guide ring located between the protective cover and the end cover body;

[0009] and a fixed ring movably mounted on the protective cover for pressurizing the oil storage cavity, a coating ring rotatably mounted on the fixed ring, a plurality of expansion members are arranged on the inner wall of the coating ring close to the motor shaft, the expansion members are used to increase in volume when heated and abut against the motor shaft, so as to rotate with the motor shaft, a plurality of guide bars are arranged on the outer wall of the coating ring close to the limiting guide ring, the guide bars are used to reciprocate into the limiting guide ring when following the rotation of the coating ring, so as to guide the reciprocating movement of the fixed ring to pressurize the oil storage cavity;

[0010] A seal detachably connected to the end cover body, wherein a waste oil cavity is provided on one side of the seal close to the end cover body, an oil pumping ring located in the waste oil cavity is provided on the seal, and an oil pumping hole connected to the one-way oil return pipe is provided on the oil pumping ring.

[0011] Furthermore, the oil storage chamber is provided with two groups, one group is a recovery chamber, and the other group is an oil injection chamber, and the recovery chamber is located directly above the oil injection chamber, and a cover plate for sealing the oil storage chamber is provided on the protective cover, and a filter hole is provided between the recovery chamber and the oil injection chamber.

[0012] Furthermore, the cover plate is provided with an air inlet hole and an oil return hole connected to the recovery chamber, and a liquid inlet hole connected to the oil injection chamber.

[0013] Furthermore, the one-way oil return pipe is provided with multiple groups and is slidably connected to the end cover body, one group of the one-way oil return pipe is connected to the air inlet hole, and the other end of the one-way oil return pipe is provided with a connecting pipe that passes through the end cover body and is connected to the oil extraction hole.

[0014] Furthermore, a piston disc and a sleeve arranged on the cover plate and connected to the oil return hole are provided on the side of the fixing ring away from the smear ring, and the piston disc and the sleeve are movably connected, an elastic part is sleeved on the outer circumference of the sleeve, and the two ends of the elastic part respectively abut the cover plate and the fixing ring, and a refueling hose connected to the liquid inlet hole is provided on the side of the fixing ring close to the cover plate.

[0015] Furthermore, the liquid inlet end of the liquid inlet hole is located at the bottom end of the oil injection cavity.

[0016] Furthermore, an oil storage tank is provided on one side of the smear ring close to the bearing sleeve on the end cover body, and a through hole connected to the refueling hose is provided on the oil storage tank.

[0017] Furthermore, the cross-section of the oil storage tank is C-shaped, so that the lubricating oil can be temporarily accumulated in the oil storage tank after being introduced into the oil storage tank.

[0018] Furthermore, the oil pumping ring is an open ring, and the opening on the oil pumping ring is located at a corresponding position of the refueling hose.

[0019] Beneficial Effects

[0020] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] 1. The temperature inside the motor end cover is monitored by the expansion piece on the smear ring. When the temperature reaches the preset value, it expands and contacts the motor shaft, thereby cooperating with the limit guide ring to reciprocate and drive the fixed ring to increase and reduce the pressure in the oil storage cavity on the protective cover, so that the lubricating oil in the oil storage cavity is circulated and introduced into the bearing sleeve on the end cover body, and the bearing and motor shaft are continuously lubricated to prevent the local temperature of the parts from being damaged due to excessive local friction, and the lubrication is more uniform, which reduces the wear of the motor end cover;

[0022] 2. Through the one-way flow of the one-way oil return pipe and the refueling hose, in conjunction with the recovery chamber, the oil filling chamber and the filter hole in the oil storage chamber, the lubricating oil is circulated and introduced into the connection between the bearing and the motor shaft to improve lubrication. At the same time, the waste oil generated after work is guided into the seal and recycled for treatment, thereby improving the utilization efficiency of the lubricating oil, reducing the maintenance frequency and reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure explosion of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection between the protective cover and the one-way oil return pipe of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection between the fixing ring and the smear ring of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the sealing member of the present invention;

[0030] Figure 7 It is a partial cross-sectional view of the cover plate of the present invention.

[0031] Figure numerals: 1. end cover body; 2. protective cover; 21. oil storage chamber; 22. cover plate; 221. air inlet hole; 222. oil return hole; 223. liquid inlet hole; 23. one-way oil return pipe; 231. limiting guide ring; 24. connecting pipe; 25. fixing ring; 251. piston disc; 252. sleeve; 253. elastic part; 254. refueling hose; 26. smear ring; 261. oil storage tank; 262. expansion part; 263. guide strip; 3. sealing part; 31. waste oil chamber; 32. oil pumping ring; 321. oil pumping hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the 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.

[0033] The present invention will be further described below in conjunction with the embodiments.

[0034] Example:

[0035] A low-wear motor end cover, see attached Figure 1-7 , including an end cover body 1, and also including:

[0036] The protective cover 2 is detachably connected to the end cover body 1, and the protective cover 2 is detachably connected to the end cover body 1 through multiple sets of bolts. An equipment cavity is provided between the bearing sleeve on the end cover body 1 and the protective cover 2, and an oil storage cavity 21 is provided on the protective cover 2.

[0037] Specifically, the oil storage chamber 21 is provided with two groups, one group is a recovery chamber, and the other group is an oil injection chamber, and the recovery chamber is located directly above the oil injection chamber, and the protective cover 2 is provided with a cover plate 22 for sealing the oil storage chamber 21, and a filter hole is provided between the recovery chamber and the oil injection chamber. The oil is recovered in the recovery chamber, and the waste oil is filtered through the filter hole provided on the protective cover 2, and then flows into the oil injection chamber for subsequent lubrication.

[0038] Furthermore, the cover plate 22 is provided with an air inlet hole 221 and an oil return hole 222 connected to the recovery chamber, and a liquid inlet hole 223 connected to the oil injection chamber. The air inlet hole 221 is used to recover waste oil, and the oil return hole 222 is used to pressurize and depressurize the oil storage chamber 21, so as to realize the continuous flow of lubricating oil between the recovery chamber and the oil injection chamber in the oil storage chamber 21. The cover plate 22 is composed of two semi-fan-shaped arc plates and is symmetrically distributed along the filter hole, so as to facilitate disassembly, cleaning or adding lubricating oil as needed during maintenance. An oil injection port is provided on the protective cover 2 for adding lubricating oil.

[0039] The one-way oil return pipe 23 extends into the oil storage chamber 21. The one-way oil return pipe 23 is provided with multiple groups and is slidably connected to the end cover body 1. The one-way oil return pipe 23 can be effectively positioned when inserted into the end cover body 1, which is convenient for installation. At the same time, one group of the one-way oil return pipe 23 is connected to the air inlet hole 221.

[0040] The one-way oil return pipe 23 is used to extract waste oil into the oil storage chamber 21 , and a limiting guide ring 231 located between the protective cover 2 and the end cover body 1 is provided on the one-way oil return pipe 23 , and a fixed gap is provided on the limiting guide ring 231 .

[0041] A fixing ring 25 is movably mounted on the protective cover 2 for pressurizing the oil storage chamber 21 , and a smear ring 26 is rotatably mounted on the fixing ring 25 . The fixing ring 25 is driven to reciprocate by the rotation of the smear ring 26 and the cooperation with the limiting guide ring 231 .

[0042] Among them, a piston disc 251 and a sleeve 252 arranged on the cover plate 22 and connected to the oil return hole 222 are provided on the side of the fixing ring 25 away from the smearing ring 26, and the piston disc 251 is movably connected with the sleeve 252. When the fixing ring 25 drives the piston disc 251 to move, the piston disc 251 cooperates with the sleeve 252 to realize the injection and extraction of air in the oil storage chamber 21. An elastic member 253 is sleeved on the outer circumference of the sleeve 252, and the two ends of the elastic member 253 respectively abut against the cover plate 22 and the fixing ring 25. The elastic member 253 is used for resetting the fixing ring 25. When the smearing ring 26 rotates, it cooperates with the limiting guide ring 231 to drive the fixing ring 25 to move toward the protective cover 2. When the smearing ring 26 cancels the squeezing of the fixing ring 25, the elastic member 253 is reset to drive the fixing ring 25 to reset. A refueling hose 254 connected to the liquid inlet hole 223 is provided on the side of the fixing ring 25 close to the cover plate 22.

[0043] In addition, the liquid inlet end of the liquid inlet hole 223 is located at the bottom of the oil filling cavity, which facilitates the lubricating oil in the oil storage cavity 21 to squeeze into the liquid inlet hole 223 and the filling hose 254, thereby preventing the ineffective addition of lubricating oil.

[0044] The inner wall of the smear ring 26 near the motor shaft is provided with a plurality of expansion members 262, and the expansion members 262 are used to expand in volume and abut against the motor shaft when heated, so as to rotate with the motor shaft. When the heat in the motor is overloaded, or the temperature exceeds a preset value, the expansion members 262 expand and abut against the motor shaft, and the motor shaft drives the smear ring 26 to rotate. The outer wall of the smear ring 26 near the limit guide ring 231 is provided with a plurality of guide strips 263, and the guide strips 263 are used to reciprocate into the limit guide ring 231 when the smear ring 26 rotates, so as to guide the fixing The reciprocating movement of the ring 25 increases or decreases the pressure in the oil storage chamber 21. When the fixed ring 25 is close to the cover plate 22, the oil storage chamber 21 is pressurized. Since the one-way oil return pipe 23 is a one-way pipe, the pressure in the oil return chamber is pressed into the filter hole and then enters the oil filling chamber for filtration. At the same time, the smear ring 26 is squeezed in to lubricate the bearing. Conversely, when the fixed ring 25 is away from the cover plate 22, the gas in the oil return chamber is extracted to reduce the pressure. Since the refueling hose 254 is also a one-way pipe, the waste oil on the side of the bearing sleeve away from the protective cover 2 is extracted through the one-way oil return pipe 23 to achieve circulation.

[0045] In addition, an oil storage tank 261 is provided on one side of the smear ring 26 close to the bearing sleeve on the end cover body 1, and a through hole connected to the refueling hose 254 is provided on the oil storage tank 261. The extruded lubricating oil enters the oil storage tank 261, and then the lubricating oil is added to the bearing in the bearing sleeve. The cross-section of the oil storage tank 261 is C-shaped, and the lubricating oil can be temporarily accumulated in the oil storage tank 261 after being introduced into the oil storage tank 261.

[0046] The seal 3 is detachably connected to the end cover body 1. The seal 3 is connected to the bearing sleeve on the end cover body 1 by screws and sealed to prevent lubricating oil from entering the motor. The seal 3 is provided with a waste oil chamber 31 on one side close to the end cover body 1. The waste oil chamber 31 is used to store waste oil generated during the operation of the bearing. The seal 3 is provided with an oil pumping ring 32 located in the waste oil chamber 31, and the oil pumping ring 32 is provided with an oil pumping hole 321 connected to the one-way oil return pipe 23. When the one-way oil return pipe 23 is extracted, the oil pumping hole 321 is used to prevent the oil from entering the motor. The waste oil in the waste oil chamber 31 is pumped back, wherein a connecting pipe 24 is provided on the one-way oil return pipe 23 inserted into the sealing member 3, and the connecting pipe 24 is communicated with the oil pumping hole 321 on the pumping ring 32, the pumping ring 32 is an open ring, and the opening on the pumping ring 32 is located at the corresponding position of the refueling hose 254 and directly below the connecting pipe 24. The used lubricating oil generates debris to form waste oil due to long-term lubrication of parts, and the waste oil will accumulate in the waste oil chamber 31, and the waste oil in the waste oil chamber 31 is pumped out through the pumping ring 32.

[0047] Working principle: Lubricating oil is added to the oil filling chamber of the oil storage chamber 21 through the oil filling port. When the motor shaft rotates and the temperature inside the motor reaches a preset value, the expansion piece 262 on the coating ring 26 expands and presses against the motor shaft, so that the coating ring 26 rotates with the motor shaft. At this time, the guide strip 263 on the outer peripheral surface of the coating ring 26 cooperates with the limiting guide ring 231, so that the coating ring 26 rotates and moves back and forth towards and away from the protective cover 2, thereby driving the fixed ring 25 to move back and forth. With the repeated reciprocating movements of the coating ring 26, the recovery chamber in the oil storage chamber 21 is pressurized or depressurized by the piston disc 251 and the sleeve 252. When pressurized, the recovery is squeezed. The lubricating oil in the cavity is filtered through the filter hole and enters the oil filling cavity, and then enters the oil storage tank 261 and is slowly applied to the bearing. As the bearing and the motor rotate, it overflows into the space between the bearing sleeve and the bearing on the end cover body 1, thereby improving lubrication and reducing wear. When the pressure is reduced, the recovery cavity is decompressed, thereby extracting part of the waste oil in the seal 3 through the one-way oil return pipe 23. At the same time, the lubricating oil between the auxiliary equipment parts moves to the waste oil cavity 31 to prevent the lubricating oil from overflowing into the motor and protecting the inside of the motor. During maintenance, it is only necessary to add an appropriate amount of lubricating oil to the oil storage cavity 21, and it is only necessary to clean the recovery cavity on the protective cover 2 during cleaning, thereby reducing the labor intensity of the staff and improving work efficiency.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-wear motor end cover, comprising an end cover body (1), characterized in that: Also includes: a protective cover (2) detachably connected to the end cover body (1), the protective cover (2) being provided with an oil storage cavity (21) and a one-way oil return pipe (23) extending into the oil storage cavity (21), the one-way oil return pipe (23) being slidably connected to the end cover body (1), and the one-way oil return pipe (23) being provided with a limiting guide ring (231) located between the protective cover (2) and the end cover body (1); and a fixed ring (25) movably mounted on the protective cover (2) for increasing the pressure in the oil storage chamber (21); a coating ring (26) rotatably mounted on the fixed ring (25); a plurality of expansion members (262) are provided on the inner wall of the coating ring (26) close to the motor shaft; the expansion members (262) are used to increase in volume when heated and to abut against the motor shaft, thereby rotating with the motor shaft; a plurality of guide bars (263) are provided on the outer wall of the coating ring (26) close to the limiting guide ring (231); the guide bars (263) are used to reciprocate into the limiting guide ring (231) when the coating ring (26) rotates, thereby guiding the reciprocating movement of the fixed ring (25) to increase the pressure in the oil storage chamber (21); A sealing member (3) detachably connected to the end cover body (1), wherein a waste oil chamber (31) is provided on a side of the sealing member (3) close to the end cover body (1), an oil pumping ring (32) located in the waste oil chamber (31) is provided on the sealing member (3), and an oil pumping hole (321) connected to the one-way oil return pipe (23) is provided on the oil pumping ring (32).

2. A low-wear motor end cover according to claim 1, characterized in that: The oil storage chamber (21) is provided with two groups, one group being a recovery chamber and the other group being an oil injection chamber, and the recovery chamber is located directly above the oil injection chamber, the protective cover (2) is provided with a cover plate (22) for sealing the oil storage chamber (21), and a filter hole is provided between the recovery chamber and the oil injection chamber.

3. A low-wear motor end cover according to claim 2, characterized in that: The cover plate (22) is provided with an air inlet hole (221) and an oil return hole (222) which are in communication with the recovery chamber, and a liquid inlet hole (223) which is in communication with the oil injection chamber.

4. A low-wear motor end cover according to claim 1, characterized in that: The one-way oil return pipes (23) are provided in multiple groups and are slidably connected to the end cover body (1), wherein one group of the one-way oil return pipes (23) is connected to the air inlet hole (221), and the other end of the one-way oil return pipe (23) is provided with a connecting pipe (24) that passes through the end cover body (1) and is connected to the oil extraction hole (321).

5. A low-wear motor end cover according to claim 2, characterized in that: A piston disc (251) and a sleeve (252) arranged on the cover plate (22) and connected to the oil return hole (222) are provided on the side of the fixing ring (25) away from the smearing ring (26), and the piston disc (251) and the sleeve (252) are movably connected. An elastic member (253) is sleeved on the outer peripheral surface of the sleeve (252), and the two ends of the elastic member (253) respectively abut against the cover plate (22) and the fixing ring (25). A refueling hose (254) connected to the liquid inlet hole (223) is provided on the side of the fixing ring (25) close to the cover plate (22).

6. A low-wear motor end cover according to claim 5, characterized in that: The liquid inlet end of the liquid inlet hole (223) is located at the bottom end of the oil injection cavity.

7. A low-wear motor end cover according to claim 1, characterized in that: An oil storage groove (261) is provided on one side of the smear ring (26) close to the bearing sleeve on the end cover body (1), and a through hole communicating with the oil filling hose (254) is provided on the oil storage groove (261).

8. A low-wear motor end cover according to claim 7, characterized in that: The cross section of the oil storage tank (261) is C-shaped, and is used for temporarily accumulating lubricating oil in the oil storage tank (261) after the lubricating oil is introduced into the oil storage tank (261).

9. A low-wear motor end cover according to claim 1, characterized in that: The oil pumping ring (32) is an open ring, and the opening on the oil pumping ring (32) is located at a corresponding position of the refueling hose (254).

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