A washing machine motor with waterproof structure installation

Abstract

The present invention discloses a washing machine motor with a waterproof structure, comprising a motor body, a limit end cover installed on the top of the motor body, a waterproof mechanism and a sealing and lubricating mechanism arranged inside the limit end cover, a transmission shaft installed on the output end of the motor body, the transmission shaft and the waterproof mechanism and the sealing and lubricating mechanism are concentrically arranged, a connecting seat is clamped on the outer wall of the motor body, and the waterproof mechanism is installed on the inner wall of the limit end cover; compared with the prior art, the present invention can drive the transmission ring to rotate during the operation of the transmission shaft, can make the rotating ball squeeze the compression ring under the elastic action of the buffer block, can make the clamping shaft deform one end of the drainage plate with the help of the stretching shaft, so that the gas on one side is discharged along the one-way transmission plate, can make the air pressure on both sides of the partition plate in the drainage plate change, can use the negative pressure to guide the water adsorbed by the sponge plate from the water inlet, so that it enters the interior of the drainage plate, plays a role of temporary storage, and is convenient for cleaning during subsequent maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a washing machine motor with a waterproof structure. Background Art

[0002] The waterproof design of the washing machine motor end cover is the key to ensuring the normal operation of the washing machine in a humid environment and extending its service life. The connection between the motor end cover and the motor body must be designed with a reliable waterproof sealing structure, such as a waterproof ring, sealing gasket or O-ring, to ensure that moisture cannot penetrate from the connection.

[0003] The design of the existing washing machine motor sealing structure needs to take into account the wear and aging problems during long-term operation to ensure that good waterproof performance can be maintained throughout the product life cycle. During use, due to the aging of the seals inside the motor, the sealing performance of the washing machine is poor, but the internal detection mechanism cannot sense and alarm for a small amount of water leakage, which may easily cause a small amount of water to accumulate around the motor end cover. As the motor is used, it is easy to follow the airflow to enter the motor, shortening the service life of the motor. For this reason, we propose a washing machine motor with a waterproof structure to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a washing machine motor with a waterproof structure installation to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a washing machine motor with a waterproof structure, comprising a motor body, a limit end cover installed on the top of the motor body, a waterproof mechanism and a sealing and lubricating mechanism are arranged inside the limit end cover, a transmission shaft is installed on the output end of the motor body, the transmission shaft is concentrically arranged with the waterproof mechanism and the sealing and lubricating mechanism, and a connecting seat is clamped on the outer wall of the motor body;

[0006] The waterproof mechanism is installed on the inner wall of the limit end cover, and the waterproof mechanism includes a limit plate, and the limit plate is clamped on the inner wall of the limit end cover. The sealing and lubricating mechanism is arranged on one side of the limit plate, and the sealing and lubricating mechanism and the limit plate are arranged concentrically. The sealing and lubricating mechanism is used for auxiliary lubrication of the transmission shaft. During the operation of the motor body, when a small amount of water penetrates into the motor body and gathers on the motor body, and easily enters the air inlet groove with the airflow, the waterproof mechanism can be used to absorb and guide the moisture at the air inlet groove, so as to play the role of storage and discharge, reduce the impact on the operation of the motor, and during the operation of the motor, the compression tube can be squeezed to discharge the lubricating oil stored inside, and the transmission shaft connection end can be oiled and lubricated.

[0007] Preferably, a circular groove is opened inside the limit plate, and a transmission ring is provided inside the circular groove, a pair of limit blocks are installed on the inner wall of the transmission ring, the transmission ring is clamped on the transmission shaft, a plurality of buffer blocks are installed on the side wall of the transmission ring, and a rotating ball is rotatably provided inside the buffer block, a compression ring is provided on the outer side of the rotating ball, the compression ring is clamped inside the circular groove, a plurality of swing shafts are inserted on the compression ring, and a clamping shaft is installed at one end of the swinging shaft, the transmission ring can push the compression ring to change and pull the clamping shaft to move during rotation, which can play a driving role and cooperate with the operation of the drainage plate to prevent water vapor from entering the motor.

[0008] Preferably, a plurality of hollow plates are installed on the limit plate, a sponge plate is provided inside the hollow plate, the position of the hollow plate corresponds to the clamping shaft, a plurality of docking plates are installed on the inner wall of the limit plate, an air inlet slot is opened on the top of the limit end cover, and the position of the docking plate corresponds to the air inlet slot;

[0009] A slot is provided on the inner side of the docking plate, one end of the hollow plate is inserted into the docking plate, an adsorption shaft is installed on one side of the hollow plate passing through the slot, the adsorption shaft is higher than the hollow plate, and is used to increase the adsorption area of ​​water vapor, the adsorption shaft is against the sponge plate inside the hollow plate, and a plurality of compression plates are installed on one end of the adsorption shaft, the compression plate is "U" shaped, a guide plate can be stuck inside the compression plate, which is used to flow back the water entering the air inlet slot to one side of the adsorption shaft, and the adsorption shaft can cooperate with the guide plate to precipitate moisture in the airflow, thereby playing a drying role.

[0010] Preferably, a drain plate is installed on the top of the hollow plate, the drain plate is elastic and has one end fixedly connected to a stretching shaft, and the stretching shaft is connected to the clamping shaft, a partition plate is provided inside the drain plate, a water inlet is opened at the bottom of the drain plate on one side close to the docking plate, and the position of the water inlet corresponds to one end of the sponge plate, a plurality of one-way transmission pipes are installed on the partition plate, the one-way transmission pipes are used to transport the moisture adsorbed from the sponge plate to the other side of the drain plate, a one-way transmission plate is inserted inside the side of the drain plate away from the docking plate, one end of the one-way transmission plate passes through a limit plate and a limit end cover for discharging excess water, and can store a certain amount of water to facilitate subsequent maintenance and cleaning, so as to prevent it from directly entering the motor and shortening the service life of the motor.

[0011] Preferably, the sealing and lubricating mechanism comprises a positioning tube, one end of which is provided with a connecting cover plate, and the connecting cover plate is provided with a plurality of docking grooves, and the positions of the docking grooves correspond to the positions of the air inlet grooves at the top of the limiting end cover.

[0012] Preferably, a static sealing ring and a compression tube are provided inside the positioning tube, and the inner wall of the static sealing ring is arranged in contact with the transmission shaft to prevent external moisture from entering the interior of the motor body.

[0013] Preferably, both ends of the static sealing ring are provided with annular grooves, and support gaskets are installed inside the annular grooves, and the support gaskets are made of metal.

[0014] Preferably, the compression tube is against one end of the static sealing ring for supporting the one end of the static sealing ring, a piston cavity is provided inside the compression tube, and a piston rod is inserted inside the piston cavity, a buffer pressure plate is fixedly connected to the bottom of the piston rod, and the buffer pressure plate is compressed by force to push the piston rod to move inside the piston cavity, a plurality of straight grooves are provided on the inner wall of the compression tube, and a fixed screen plate is installed inside the straight groove, and the movement of the piston rod can press out the lubricating oil inside the piston cavity for lubricating the transmission shaft, which can play a role in maintenance, reduce the problem of insufficient lubricating oil during long-term use, and avoid abnormal noise from the motor body during operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention can drive the transmission ring to rotate during the operation of the transmission shaft, and can make the rotating ball squeeze the compression ring under the elastic action of the buffer block, so that the clamping shaft can deform one end of the drainage board with the help of the stretching shaft, so that the gas on one side is discharged along the one-way transmission plate, and the air pressure on both sides of the partition plate in the drainage board can be changed. The water adsorbed by the sponge board can be guided out from the water inlet with the help of negative pressure, so that it can enter the interior of the drainage board, play a role of temporary storage, and is convenient for cleaning during subsequent maintenance;

[0017] 2. When water vapor enters through the air inlet slot, the present invention can blow the airflow to the side of the adsorption shaft under the action of the guide plate, and can precipitate the moisture therein with the help of the adsorption shaft and the sponge plate, thereby reducing the situation where the airflow contains more moisture and preventing it from entering the motor body with the airflow. It can ensure that the inside of the equipment is dry and prevent moisture from entering the inside, causing rust or damp short circuit of electronic components;

[0018] 3. After the compression tube is installed, the buffer pressure plate at the bottom of the present invention is squeezed, which can push the piston rod to move, and absorb the lubricating oil inside the piston cavity onto the fixed screen plate. As the transmission shaft rotates, it can be lubricated, reducing the situation where the motor has abnormal noise due to insufficient lubricating oil after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the disassembly and assembly structure of the motor body of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of one side of the position limiting end cover of the present invention;

[0022] Figure 4 It is a schematic diagram of the waterproof mechanism structure of the present invention;

[0023] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram in the middle;

[0024] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a drainage board of the present invention;

[0025] Figure 7 This is a schematic diagram of the disassembly and assembly structure of the sealing and lubricating mechanism of the present invention;

[0026] Figure 8 It is a partial cross-sectional schematic diagram of the compression tube of the present invention;

[0027] In the figure: 1. Motor body; 2. Limit end cover; 3. Waterproof mechanism; 4. Sealing and lubrication mechanism; 11. Connecting seat; 12. Transmission shaft; 21. Air inlet slot; 31. Limit plate; 32. Docking plate; 33. Hollow plate; 34. Adsorption shaft; 341. Compression sheet; 35. Compression ring; 351. Card-connecting shaft; 36. Transmission ring; 361. Rotating ball; 37. Drain plate; 371. Partition plate; 372. One-way transmission pipe; 373. One-way transmission plate; 41. Positioning pipe; 42. Static sealing ring; 43. Support gasket; 44. Compression pipe; 441. Buffer pressure plate; 45. Piston rod; 46. Fixed screen plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0029] See also Figure 1-Figure 8 The present invention provides a technical solution: a washing machine motor with a waterproof structure, comprising a motor body 1, a limit end cover 2 installed on the top of the motor body 1, a waterproof mechanism 3 and a sealing and lubricating mechanism 4 are arranged inside the limit end cover 2, a transmission shaft 12 is installed on the output end of the motor body 1, the transmission shaft 12 is concentrically arranged with the waterproof mechanism 3 and the sealing and lubricating mechanism 4, and a connecting seat 11 is clamped on the outer wall of the motor body 1;

[0030] The waterproof mechanism 3 is installed on the inner wall of the limit end cover 2. The waterproof mechanism 3 includes a limit plate 31. The limit plate 31 is clamped on the inner wall of the limit end cover 2. The sealing and lubricating mechanism 4 is arranged on one side of the limit plate 31. The sealing and lubricating mechanism 4 and the limit plate 31 are arranged concentrically. The sealing and lubricating mechanism 4 is used for auxiliary lubrication of the transmission shaft 12. During the operation of the motor body 1, when a small amount of water penetrates into the motor body 1 and gathers on the motor body 1, and easily enters the air inlet groove 21 with the airflow, the waterproof mechanism 3 can be used to absorb and guide the moisture at the air inlet groove 21 at this time, so as to play the role of storage and discharge, thereby reducing the impact on the operation of the motor. In addition, during the operation of the motor, the compression tube 44 can be squeezed to discharge the lubricating oil stored inside, and the connecting end of the transmission shaft 12 can be oiled and lubricated, thereby reducing the abnormal noise caused by the lubricant during the operation of the motor.

[0031] like Figure 5 As shown, in order to squeeze the drain plate 37 to absorb excess water, a circular groove is opened inside the limit plate 31, and a transmission ring 36 is provided inside the circular groove. A pair of limit blocks are installed on the inner wall of the transmission ring 36. The transmission ring 36 is clamped on the transmission shaft 12. A plurality of buffer blocks are installed on the side wall of the transmission ring 36, and a rotating ball 361 is provided inside the buffer block for rotation. A compression ring 35 is provided on the outer side of the rotating ball 361. The compression ring 35 is clamped inside the circular groove. A plurality of swing shafts are inserted on the compression ring 35, and a clamping shaft 351 is installed at one end of the swing shaft. During the rotation of the transmission ring 36, the compression ring 35 can be pushed to deform and the clamping shaft 351 can be pulled to move. During the rotation of the transmission ring 36, the rotating ball 361 can cooperate with the buffer block to squeeze the compression ring 35, so that the swing shaft and the clamping shaft 351 on the compression ring 35 can move with the compression ring 35, and the drain plate 37 can be pulled by the stretching shaft to change the internal air pressure and drain the water in the sponge board.

[0032] like Figure 4 As shown, in order to reduce the entry of water vapor into the motor, a plurality of hollow plates 33 are installed on the limit plate 31, a sponge plate is arranged inside the hollow plate 33, and the position of the hollow plate 33 corresponds to the clamping shaft 351, a plurality of docking plates 32 are installed on the inner wall of the limit plate 31, and an air inlet slot 21 is opened on the top of the limit end cover 2, and the position of the docking plate 32 corresponds to the air inlet slot 21;

[0033] A slot is provided on the inner side of the docking plate 32, and one end of the hollow plate 33 is inserted into the docking plate 32. An adsorption shaft 34 is installed on one side of the hollow plate 33 that passes through the slot. The adsorption shaft 34 is higher than the hollow plate 33 and is used to increase the adsorption area of ​​water vapor. The adsorption shaft 34 is against the sponge plate inside the hollow plate 33. A plurality of compression plates 341 are installed at one end of the adsorption shaft 34. The compression plates 341 are "U"-shaped. A guide plate can be provided inside the compression plates 341 to reverse the water entering the air inlet slot 21 to one side of the adsorption shaft 34. The guide plate can be used to conduct the airflow containing water vapor to one side of the adsorption shaft 34, and the adsorption shaft 34 can cooperate with the sponge plate to play a role in auxiliary drying, thereby reducing the water content of the airflow and preventing the electronic components inside the motor from being damaged due to the accumulation of water vapor.

[0034] like Figure 6 As shown, the water vapor adsorbed during operation needs to be temporarily stored or discharged, and a drain plate 37 is installed on the top of the hollow plate 33. The drain plate 37 is elastic and one end is fixedly connected to a stretching shaft, and the stretching shaft is connected to the clamping shaft 351. A partition plate 371 is provided inside the drain plate 37. A water inlet is provided at the bottom of the side of the drain plate 37 close to the docking plate 32, and the position of the water inlet corresponds to one end of the sponge plate. A plurality of one-way transmission pipes 372 are installed on the partition plate 371. The one-way transmission pipe 372 is used to transport the water adsorbed from the sponge plate to the other side of the drain plate 37. A single To the transmission plate 373, one end of the one-way transmission plate 373 passes through the limiting plate 31 and the limiting end cover 2, and is used to discharge excess water. As one side of the drainage plate 37 is stretched and squeezed, the air on one side of the partition plate 371 is discharged along the one-way transmission plate 373, which can make the air pressure on both sides of the partition plate 371 different. Therefore, the water in the sponge board can be guided out along the water suction port with the help of the air pressure, and can be stored in the space on the side of the one-way transmission plate 373, which can play a role of temporary storage. In the subsequent maintenance process, the water can be extracted with the help of the desired suction equipment, which is convenient for subsequent unified maintenance processing.

[0035] like Figure 7 As shown, the sealing and lubricating mechanism 4 includes a positioning tube 41, one end of which is provided with a connecting cover plate, and a plurality of docking grooves are opened on the connecting cover plate, and the positions of the docking grooves correspond to the positions of the air inlet grooves 21 at the top of the limiting end cover 2, and will not interfere with the waterproof mechanism 3.

[0036] Preferably, a static sealing ring 42 and a compression tube 44 are provided inside the positioning tube 41. The inner wall of the static sealing ring 42 is in contact with the transmission shaft 12 to prevent external moisture from entering the motor body 1. The static sealing ring 42 can play a barrier role, which not only reduces the impact of external water vapor on the transmission shaft 12, but also avoids leakage of lubricating oil.

[0037] Both ends of the static sealing ring 42 are provided with annular grooves, and a supporting gasket ring 43 is installed inside the annular groove. The supporting gasket ring 43 is made of metal and can play a supporting role, increase the strength of the static sealing ring 42 itself, and prolong the service life.

[0038] like Figure 8 As shown, in order to reduce abnormal noise caused by lack of lubricant in the operation of the transmission shaft 12, the compression tube 44 is against one end of the static sealing ring 42 to support one end of the static sealing ring 42. A piston cavity is provided inside the compression tube 44, and a piston rod 45 is inserted inside the piston cavity. A buffer pressure plate 441 is fixedly connected to the bottom of the piston rod 45. The buffer pressure plate 441 is compressed by force and can push the piston rod 45 to move inside the piston cavity. A plurality of straight grooves are provided on the inner wall of the compression tube 44, and a fixed screen plate 46 is installed inside the straight groove. The movement of the piston rod 45 can press out the lubricating oil inside the piston cavity for oiling and lubricating the transmission shaft 12. A certain amount of lubricating oil can be stored with the help of the piston cavity. After installation, the buffer pressure plate 441 can be deformed and then push the piston rod 45 to move, and the lubricating oil inside the piston cavity can be guided out so that it adheres to the vicinity of the fixed screen plate 46. The surface of the transmission shaft 12 can be oiled and lubricated during its operation to prevent the service life of the equipment from being shortened due to insufficient lubricating oil.

[0039] Working principle: First, during the operation of the motor body 1, when a small amount of water penetrates into the motor body 1 and gathers on the motor body 1, and easily enters the air inlet slot 21 with the air flow, the waterproof mechanism 3 can be used to absorb and guide the water at the air inlet slot 21, so as to play the role of storage and discharge, and reduce the impact on the operation of the motor. In addition, during the operation of the motor, the compression tube 44 can be squeezed to discharge the lubricating oil stored inside, and the connecting end of the transmission shaft 12 can be lubricated. During the operation of the transmission shaft 12, the transmission ring 36 can be driven to rotate, and the rotating ball 361 can squeeze the compression ring 35 under the elastic action of the buffer block, and the clamping shaft 351 can deform one end of the drainage plate 37 with the help of the stretching shaft, so that the gas on one side is discharged along the one-way transmission plate 373, and the air pressure on both sides of the partition plate 371 in the drainage plate 37 can be changed. The water adsorbed by the sponge plate can be guided out from the water inlet with the help of negative pressure, so that it enters the inside of the drainage plate 37, and plays a role of temporary storage, which is convenient for cleaning during subsequent maintenance.

[0040] When water vapor or the like enters along the air inlet slot 21, the air flow can be blown to the side of the adsorption shaft 34 under the action of the guide plate, which can reduce the amount of water in the air flow, and under the action of the sponge plate, the excess water can be adsorbed to prevent it from following the air flow into the motor body 1, which can ensure that the inside of the device is dry and prevent water from entering the inside, causing rust or moisture short circuit of electronic components.

[0041] Finally, after the compression tube 44 is installed, the buffer pressure plate 441 at the bottom is squeezed, which can push the piston rod 45 to move, and absorb the lubricating oil inside the piston cavity onto the fixed screen plate 46. As the transmission shaft 12 rotates, it can be lubricated, reducing the abnormal noise inside the motor caused by insufficient lubricating oil after long-term use.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A washing machine motor with a waterproof structure, comprising a motor body (1), a limiting end cover (2) installed on the top of the motor body (1), a waterproof mechanism (3) and a sealing and lubricating mechanism (4) being provided inside the limiting end cover (2), characterized in that: A transmission shaft (12) is mounted on the output end of the motor body (1), the transmission shaft (12) is arranged concentrically with the waterproof mechanism (3) and the sealing and lubricating mechanism (4), and a connecting seat (11) is clamped on the outer wall of the motor body (1); The waterproof mechanism (3) is mounted on the inner wall of the limiting end cover (2), the waterproof mechanism (3) comprises a limiting plate (31), the limiting plate (31) is clamped on the inner wall of the limiting end cover (2), the sealing lubricating mechanism (4) is arranged on one side of the limiting plate (31), the sealing lubricating mechanism (4) and the limiting plate (31) are arranged concentrically, and the sealing lubricating mechanism (4) is used for auxiliary lubrication of the transmission shaft (12); A circular groove is provided inside the limit plate (31), and a transmission ring (36) is provided inside the circular groove. A pair of limit blocks are installed on the inner wall of the transmission ring (36). The transmission ring (36) is clamped on the transmission shaft (12). A plurality of buffer blocks are installed on the side wall of the transmission ring (36), and a rotating ball (361) is rotatably provided inside the buffer block. A compression ring (35) is provided outside the rotating ball (361). The compression ring (35) is clamped inside the circular groove. A plurality of swing shafts are inserted into the compression ring (35), and a clamping shaft (351) is installed at one end of the swing shaft. During the rotation of the transmission ring (36), the compression ring (35) can be pushed to deform, and the clamping shaft (351) can be pulled to move. A plurality of hollow plates (33) are mounted on the limit plate (31), a sponge plate is arranged inside the hollow plate (33), the position of the hollow plate (33) corresponds to the clamping shaft (351), a plurality of docking plates (32) are mounted on the inner wall of the limit plate (31), an air inlet slot (21) is provided on the top of the limit end cover (2), and the position of the docking plate (32) corresponds to the air inlet slot (21); A slot is provided on the inner side of the docking plate (32), one end of the hollow plate (33) is inserted into the docking plate (32), an adsorption shaft (34) is installed on one side of the hollow plate (33) that passes through the slot, the adsorption shaft (34) is higher than the hollow plate (33) and is used to increase the adsorption area of ​​water vapor, the adsorption shaft (34) is against the sponge plate inside the hollow plate (33), and one end of the adsorption shaft (34) is installed with a plurality of compression plates (341), the compression plates (341) are in a "U" shape, and a guide plate can be fixed inside the compression plates (341) to reverse the water entering the air inlet slot (21) to the side of the adsorption shaft (34).

2. The washing machine motor with waterproof structure installation according to claim 1, characterized in that: A drain plate (37) is installed on the top of the hollow plate (33). The drain plate (37) is elastic and has one end fixedly connected to a stretching shaft, and the stretching shaft is connected to the clamping shaft (351). A partition plate (371) is provided inside the drain plate (37). A water inlet is provided at the bottom of a side of the drain plate (37) close to the docking plate (32), and the position of the water inlet corresponds to one end of the sponge plate. A plurality of one-way transmission pipes (372) are installed on the partition plate (371). The one-way transmission pipes (372) are used to transport water absorbed from the sponge plate to the other side of the drain plate (37). A one-way transmission plate (373) is inserted inside a side of the drain plate (37) away from the docking plate (32). One end of the one-way transmission plate (373) passes through the limit plate (31) and the limit end cover (2) to discharge excess water.

3. The washing machine motor with waterproof structure installation according to claim 1, characterized in that: The sealing lubrication mechanism (4) comprises a positioning tube (41), one end of the positioning tube (41) is provided with a connecting cover plate, and the connecting cover plate is provided with a plurality of docking grooves, and the positions of the docking grooves correspond to the positions of the air inlet grooves (21) at the top of the limiting end cover (2).

4. The washing machine motor with waterproof structure installation according to claim 3, characterized in that: A static sealing ring (42) and a compression tube (44) are clamped inside the positioning tube (41); the inner wall of the static sealing ring (42) is arranged in contact with the transmission shaft (12) to prevent external moisture from entering the interior of the motor body (1).

5. The washing machine motor with waterproof structure installation according to claim 4, characterized in that: Both ends of the static sealing ring (42) are provided with annular grooves, and a supporting gasket ring (43) is installed inside the annular groove, and the supporting gasket ring (43) is made of metal.

6. The washing machine motor with waterproof structure installation according to claim 4, characterized in that: The compression tube (44) is against one end of the static sealing ring (42) for supporting one end of the static sealing ring (42); a piston cavity is provided inside the compression tube (44), and a piston rod (45) is inserted inside the piston cavity; a buffer pressure plate (441) is fixedly connected to the bottom of the piston rod (45); the buffer pressure plate (441) is compressed by force and can push the piston rod (45) to move inside the piston cavity; a plurality of straight grooves are provided on the inner wall of the compression tube (44), and a fixed screen plate (46) is installed inside the straight grooves; the movement of the piston rod (45) can press out the lubricating oil inside the piston cavity for lubricating the transmission shaft (12).

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