A lubricating device for high speed bearings and seals of a reduction gearbox

Abstract

The application discloses a lubricating device for high-speed bearing and sealing element of a reduction gearbox, and particularly relates to the technical field of reduction gearbox lubrication. The surface of a driving motor driving shaft is sleeved with a bearing seat, the inside of the bearing seat is fixedly provided with a bearing and an oil seal which are sleeved on the driving motor driving shaft. An output shaft is rotatably connected to the connecting part of the upper shell and the lower shell, the surface of the output shaft is fixedly sleeved with a cam, the inside of the lower shell is provided with a pump oil device assembly, the cam is in contact with the pump oil device assembly, and the lower shell is connected with the bearing seat through an oil pipe. The cam is arranged, the high and low points generated by the rotation of the cam are used to drive the reciprocating movement of a piston, oil suction and oil pressing are realized, the high-position bearing and the sealing element are lubricated, the lubrication of the bearing and the sealing element is ensured, more oil is avoided from being added, the cost of oil and the risk of oil leakage are avoided, and therefore the application has practicability.

Description

Technical Field

[0001] This invention relates to the field of gearbox lubrication technology, and more specifically, to a lubrication device for high-speed bearings and seals in a gearbox. Background Technology

[0002] It is known that most existing gearbox bearings and seals are lubricated using oil or grease. For bearings and seals at higher elevations, oil lubrication is generally used, typically through immersion, splash lubrication, or by adding an additional oil pump for forced lubrication. Because some gearboxes are quite tall, and the corresponding high-speed bearings and seals are located at the top, more oil needs to be added to raise the oil level to ensure lubrication. This can increase oil costs, resistance to oil churning in moving parts, and heat generation from oil churning. Excessive oil also increases the risk of leakage. Some gearboxes use circulating oil pumps to draw oil from inside the gearbox and supply it to the high-speed, high-position bearings and seals via external piping. However, this structure requires a power source for the pump, inevitably leading to structural complexity and increased costs.

[0003] Therefore, in order to solve the lubrication problem of high-speed, high-position bearings and seals, a lubrication device for high-speed bearings and seals in a gearbox is proposed as a further improvement. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a lubrication device for a high-speed bearing and seal of a gearbox, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lubrication device for a high-speed bearing and seal of a gearbox, comprising a gearbox assembly, the gearbox assembly comprising: a motor mounting bracket, an upper housing and a lower housing, the bottom of the motor mounting bracket being fixedly mounted on the top of the upper housing, the bottom of the upper housing being fixedly mounted on the top of the lower housing, a drive motor being fixedly mounted inside the motor mounting bracket, a bearing seat being sleeved on the surface of the upper housing through the drive shaft of the drive motor, and a bearing and an oil seal being fixedly mounted inside the bearing seat and sleeved on the drive shaft of the drive motor;

[0006] An output shaft is rotatably connected at the connection between the upper and lower housings. A cam is fixedly sleeved on the surface of the output shaft. An oil pump assembly is installed inside the lower housing, and the cam contacts the oil pump assembly. The lower housing is connected to a bearing seat through an oil pipe. A transmission mechanism is provided between the drive shaft and the output shaft of the drive motor.

[0007] Furthermore, the transmission mechanism includes: a driving spiral bevel gear, a driven spiral bevel gear, a driving transmission gear, and a driven transmission gear;

[0008] The driving spiral bevel gear, driven spiral bevel gear, driving transmission gear, and driven transmission gear all rotate inside the upper housing. The driving transmission gear is fixedly sleeved on one end of the drive motor drive shaft that passes through the bearing seat. The driven spiral bevel gear is fixedly sleeved on the surface of the output shaft. The driven transmission gear and the driving spiral bevel gear are fixedly sleeved on the same rotating shaft. The driving transmission gear and the driven transmission gear are meshed together. The driving spiral bevel gear and the driven spiral bevel gear are meshed together.

[0009] Furthermore, the oil pump assembly includes: a piston sleeve, a piston, a piston return spring, a large one-way valve, a damping plug, a small one-way valve, and a damping spring;

[0010] The piston sleeve has three annular grooves on its outer periphery, and the three annular grooves are fitted with a first O-ring, a second O-ring, and a third O-ring in sequence from top to bottom;

[0011] The external thread at the bottom of the piston sleeve is threadedly connected to the internal thread at the bottom of the lower housing. The top of the piston sleeve has a telescopic groove extending between the second and third O-ring seals. The bottom of the piston is inserted into the telescopic groove. The cam contacts the top of the piston. The damping spring and the small one-way valve are located inside the piston. The piston return spring and the large one-way valve are located in the telescopic groove. The damping plug is inserted into the bottom of the piston. The end face of the bottom of the damping plug is fixedly connected to the large one-way valve through the piston return spring. The oil pump assembly has an oil hole mechanism for oil suction and oil pressure.

[0012] Furthermore, a stepped groove is provided at the bottom of the piston, and a deep hole communicating with the stepped groove is provided inside the piston. The damping plug is fixedly installed in the stepped groove, one end of the damping spring is fixedly installed on the inner wall at the top of the deep hole, and the small one-way valve is fixedly installed on the other end of the damping spring.

[0013] Furthermore, the oil hole mechanism includes: a first oil hole, a second oil hole, and a third oil hole;

[0014] The first oil hole is located on the outer wall of the piston sleeve between the first O-ring and the second O-ring, and the first oil hole communicates with the inner wall of the side of the expansion joint.

[0015] The second oil hole is located on the outer wall of the piston sleeve between the second and third O-rings, and it communicates with the inner wall of the bottom of the expansion joint.

[0016] The third oil hole is located on the side of the piston and is connected to the side of the deep hole.

[0017] The damping plug has a through hole in the middle, the bottom of the small one-way valve is close to the top of the through hole, the second oil hole is chamfered at the connection between it and the expansion groove, and the bottom of the large one-way valve is close to the chamfer.

[0018] The area between the second O-ring, the third O-ring, the lower housing, and the piston sleeve is configured as a first cavity, and the lower housing has an oil suction hole communicating with the first cavity;

[0019] The area between the first O-ring, the second O-ring, the lower housing, and the piston sleeve is configured as a second cavity, and the lower housing has an oil outlet hole communicating with the second cavity.

[0020] Furthermore, the cross-sectional shape of the second oil hole is set to a T-shape.

[0021] Furthermore, the motor mounting bracket has a process hole, the bearing housing has a side hole, one end of the oil pipe passes through the process hole and is connected to the side hole, and the other end of the oil pipe is connected to the oil outlet hole.

[0022] The technical effects and advantages of this invention are as follows:

[0023] 1. Compared with existing technologies, by setting a cam, the reciprocating motion of the piston is controlled by the high and low points generated by the rotation of the cam, realizing oil suction and oil pressure, and lubricating the high-position bearing and seals. The structure of the piston and piston sleeve is simple; the lubrication system is reliable and inexpensive; the lubrication system improves the service life of the bearings and oil seals; thus ensuring the lubrication of the bearings and seals, and avoiding the need to add more oil, avoiding increased oil costs and the risk of oil leakage, thus it is practical.

[0024] 2. Compared with the existing technology, by setting a small one-way valve and a damping spring, the through hole opened by the damping plug can be blocked, thereby changing the direction of the oil to facilitate the oil suction and pressure of the whole device; by setting a large one-way valve and a piston return spring, the piston return spring can provide support force to the piston, so that the piston can be driven by the cam and the piston return spring to make uplift and reciprocating motion. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the oil pump assembly of the present invention.

[0027] Figure 3 This is a schematic diagram of the oil pressure circuit inside the piston sleeve of the present invention.

[0028] Figure 4 This is a schematic diagram of the oil suction line inside the piston sleeve of the present invention.

[0029] Figure 5 This is a diagram showing the lubrication status of the bearing oil seal in this invention.

[0030] Figure 6 This is a schematic cross-sectional view of the stepped groove and deep hole of the present invention.

[0031] Figure 7 This is a schematic cross-sectional view of the piston and damping plug of the present invention.

[0032] Figure 8 This is a cross-sectional structural diagram of the piston sleeve of the present invention.

[0033] The attached figures are labeled as follows:

[0034] 1. Gearbox assembly;

[0035] 11. Motor mounting bracket; 111. Process hole; 12. Upper housing; 13. Lower housing; 14. Drive motor; 2. Bearing housing; 21. Side hole;

[0036] 3. Bearings; 4. Oil seals; 5. Output shaft; 6. Cams;

[0037] 7. Oil pump assembly;

[0038] 71. Piston sleeve;

[0039] 711. Annular groove; 712. First O-ring seal; 713. Second O-ring seal; 714. Third O-ring seal; 715. Expansion groove;

[0040] 72. Piston; 721. Stepped groove; 722. Deep hole;

[0041] 73. Piston return spring; 74. Large one-way valve;

[0042] 75. Damping plug; 751. Through hole;

[0043] 76. Small one-way valve; 77. Damping spring;

[0044] 8. Oil pipes;

[0045] 9. Transmission mechanism;

[0046] 91. Driving spiral bevel gear; 92. Driven spiral bevel gear; 93. Driving transmission gear; 94. Driven transmission gear; 95. Rotating shaft;

[0047] 10. Oil hole mechanism;

[0048] 101. First oil hole; 102. Second oil hole; 103. Third oil hole; 104. Chamfer. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0050] As attached Figures 1-8 The lubrication device for high-speed bearings and seals of a gearbox shown includes a gearbox assembly 1. The gearbox assembly 1 includes a motor mounting bracket 11, an upper housing 12 and a lower housing 13. The bottom of the motor mounting bracket 11 is fixedly mounted on the top of the upper housing 12, and the bottom of the upper housing 12 is fixedly mounted on the top of the lower housing 13. A drive motor 14 is fixedly mounted inside the motor mounting bracket 11.

[0051] Among them, the drive motor 14 is connected to the motor mounting bracket 11 by bolts, the motor mounting bracket 11 is connected to the upper housing 12 by bolts, and the upper housing 12 is connected to the lower housing 13 by bolts;

[0052] The drive shaft of the drive motor 14 passes through the surface of the upper housing 12 and is fitted with a bearing seat 2. The bearing seat 2 is fixedly installed with a bearing 3 and an oil seal 4 that are fitted onto the drive shaft of the drive motor 14. An output shaft 5 is rotatably connected at the connection between the upper housing 12 and the lower housing 13. A cam 6 is fixedly fitted onto the surface of the output shaft 5. An oil pump assembly 7 is provided inside the lower housing 13, and the cam 6 contacts the oil pump assembly 7. The lower housing 13 is connected to the bearing seat 2 through an oil pipe 8. A transmission mechanism 9 is provided between the drive shaft of the drive motor 14 and the output shaft 5.

[0053] The transmission mechanism 9 includes: a driving spiral bevel gear 91, a driven spiral bevel gear 92, a driving transmission gear 93, and a driven transmission gear 94;

[0054] The driving spiral bevel gear 91, driven spiral bevel gear 92, driving transmission gear 93, and driven transmission gear 94 all rotate inside the upper housing 12. The driving transmission gear 93 is fixedly sleeved on one end of the drive shaft of the drive motor 14 that passes through the bearing seat 2. The driven spiral bevel gear 92 is fixedly sleeved on the surface of the output shaft 5. The driven transmission gear 94 and the driving spiral bevel gear 91 are fixedly sleeved on the same rotating shaft 95. The driving transmission gear 93 and the driven transmission gear 94 are meshed and connected. The driving spiral bevel gear 91 and the driven spiral bevel gear 92 are meshed and connected.

[0055] When the gearbox starts working, the drive shaft of the drive motor 14 passes through the bearing 3 and the oil seal 4, transmitting power to the drive gear 93 connected to it. The drive gear 93 transmits power to the driven gear 94 meshing with it. The driven gear 94 transmits power to the drive spiral bevel gear 91 via the rotating shaft 95. The drive spiral bevel gear 91 then transmits power to the driven gear 94 meshing with it. The driven gear 94 drives the output shaft 5 to rotate. Since the cam 6 is connected to the output shaft 5 via a spline, when the output shaft 5 rotates, it will drive the cam 6 to rotate. The rotation of the cam 6 will drive the piston 72 on the oil pump assembly 7 to reciprocate. Therefore, this transmission mechanism 9 has the transmission effect of driving the motor 14 to drive the output shaft 5 to rotate. That is, the cam 6 is connected to the output shaft 5 and can rotate clockwise and counterclockwise together with the output shaft 5.

[0056] In a preferred embodiment, as shown in the appendix Figures 1-8 As shown, the oil pump assembly 7 includes: piston sleeve 71, piston 72, piston return spring 73, large check valve 74, damping plug 75, small check valve 76, and damping spring 77.

[0057] The piston sleeve 71 has three annular grooves 711 on its outer periphery, and the three annular grooves 711 are fitted with a first O-ring 712, a second O-ring 713 and a third O-ring 714 from top to bottom.

[0058] The piston sleeve 71 has an external thread at the bottom that is threaded to the internal thread at the bottom of the lower housing 13. The piston sleeve 71 has a telescopic groove 715 at the top that extends between the second O-ring 713 and the third O-ring 714. The bottom of the piston 72 is inserted into the telescopic groove 715. The cam 6 contacts the top of the piston 72. The damping spring 77 and the small one-way valve 76 are located inside the piston 72. The piston return spring 73 and the large one-way valve 74 are located inside the telescopic groove 715. The damping plug 75 is inserted into the bottom of the piston 72. The end face of the bottom of the damping plug 75 is fixedly connected to the large one-way valve 74 through the piston return spring 73. The pump assembly 7 has an oil hole mechanism 10 for oil suction and oil pressure inside.

[0059] The piston 72 has a stepped groove 721 at the bottom and a deep hole 722 communicating with the stepped groove 721 inside the piston 72. The damping plug 75 is fixedly installed in the stepped groove 721. One end of the damping spring 77 is fixedly installed on the inner wall of the top of the deep hole 722. The small one-way valve 76 is fixedly installed on the other end of the damping spring 77.

[0060] Among them, the piston 72 is driven by the cam 6 and the piston return spring 73 to perform reciprocating motion in the telescopic groove 715 opened in the piston sleeve 71.

[0061] Among them, piston sleeve 71 is installed vertically;

[0062] Among them, the large one-way valve 74 uses its own weight to fall on the chamfer 715 at the bottom of the piston sleeve 71, making linear contact with it to form a seal;

[0063] Among them, the damping plug 75 has a countersunk hole at one end and a hexagonal countersunk hole at the other end, which makes it easy to disassemble and install the plug;

[0064] The oil hole mechanism 10 includes: a first oil hole 101, a second oil hole 102 and a third oil hole 103;

[0065] The first oil hole 101 is located on the outer wall of the piston sleeve 71 between the first O-ring 712 and the second O-ring 713. The first oil hole 101 communicates with the inner wall of the side of the expansion groove 715.

[0066] The second oil hole 102 is located on the outer wall of the piston sleeve 71 between the second O-ring 713 and the third O-ring 714. The second oil hole 102 communicates with the inner wall of the bottom of the expansion groove 715.

[0067] The third oil hole 103 is located on the side of the piston 72, and the third oil hole 103 is connected to the side of the deep hole 722.

[0068] The damping plug 75 has a through hole 751 in the middle, the bottom of the small one-way valve 76 is close to the top of the through hole 751, the second oil hole 102 is connected to the telescopic groove 715 with a chamfer 104, and the bottom of the large one-way valve 74 is close to the chamfer 104.

[0069] Among them, the small one-way valve 76 presses the end of the through hole 751 of the damping plug 75 under the elastic force of the damping spring 77, sealing the through hole 751 of the damping plug 75, which can change the direction of the oil so as to complete the oil suction and oil pressure of the whole device.

[0070] The area between the second O-ring 713, the third O-ring 714, the lower housing 13 and the piston sleeve 71 is set as the first cavity, and the lower housing 13 is provided with an oil suction hole communicating with the first cavity.

[0071] The area between the first O-ring 712, the second O-ring 713, the lower housing 13 and the piston sleeve 71 is set as a second cavity, and the lower housing 13 is provided with an oil outlet hole communicating with the second cavity;

[0072] The motor mounting bracket 11 has a process hole 111, and the side of the bearing housing 2 has a side hole 21. One end of the oil pipe 8 passes through the process hole 111 and is connected to the side hole 21, and the other end of the oil pipe 8 is connected to the oil outlet hole.

[0073] Among them, after the damping plug 75 is inserted into the stepped groove 721, one end of the piston return spring 73 is liquid-insulated into the stepped groove 721 so that the piston return spring 73 can be installed and positioned.

[0074] The oil inlet path is as follows: oil from outside the lower housing 13 enters the first cavity through the oil suction hole, then enters the expansion groove 715 through the second oil hole 102 under the control of the large one-way valve 74, then enters the deep hole 722 through the through hole 751 opened by the damping plug 75 under the control of the small one-way valve 76, then enters the first oil hole 101 through the expansion groove 715 from the third oil hole 103 to reach the second cavity, and finally the oil enters the bearing housing 2 along the oil pipe 8 through the oil outlet hole to lubricate the bearing 3 and the oil seal 4.

[0075] In a preferred embodiment, as shown in the appendix Figures 1-8 As shown, the cross-sectional shape of the second oil hole 102 is set to a T-shape so that when the oil in the first cavity flows into the expansion groove 715 of the piston sleeve 71 through the second oil hole 102, blockage is avoided.

[0076] Working principle of the invention: In use, the drive motor 14 drives the output shaft 5 to rotate through the transmission mechanism 9, which in turn causes the cam 6 to rotate and drive the piston 72 on the oil pump assembly 7 to reciprocate.

[0077] As the more protruding part of the cam 6 moves from the low point to the high point, the piston return spring 73 in the oil pump assembly 7 will push the piston 72 upward, so that the piston 72 is always in contact with the outer circular surface of the cam 6. At this time, the damping spring 77 in the piston 72 will push the small one-way valve 76 to press against the end face of the through hole 751 opened by the damping plug 75, sealing the oil in the sealed space constructed by the expansion groove 715 opened by the piston 72 and the piston sleeve 71. The sealed space will generate negative pressure, and the large one-way valve 74 will disengage from the chamfer 104 of the piston sleeve 71 under the action of negative pressure. Then, the oil outside the lower housing 13 enters the first cavity through the oil suction hole, and then enters the sealed space of the expansion groove 715 through the second oil hole 102 under the control of the large one-way valve 74. This process is the oil suction process of the oil pump assembly 7.

[0078] As the more protruding part of cam 6 moves from the high point to the low point, the outer surface of cam 6 is always in contact with piston 72. Cam 6 drives piston 72 to move downward. At this time, under the action of gravity and the pressure of the sealed space, the large one-way valve 74 blocks the chamfer 104, and piston 72 moves downward. Then the pressure of the sealed space forces oil into the through hole 751 opened by the damping plug 75 and overcomes the force of the damping spring 77. The small one-way valve 76 leaves the through hole 751, and the oil enters the deep hole 722. Then it enters the first oil hole 101 from the third oil hole 103 through the telescopic groove 715 and reaches the second cavity. Finally, the oil enters the bearing seat 2 along the oil pipe 8 through the oil outlet to lubricate the bearing 3 and the oil seal 4. This process is the oil pressing process of the oil pump assembly 7.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lubrication device for a high-speed bearing and seal of a gearbox, comprising a gearbox assembly (1), the gearbox assembly (1) comprising: The motor mounting bracket (11), the upper housing (12) and the lower housing (13) are provided. The bottom of the motor mounting bracket (11) is fixedly installed on the top of the upper housing (12), and the bottom of the upper housing (12) is fixedly installed on the top of the lower housing (13). A drive motor (14) is fixedly installed inside the motor mounting bracket (11). The characteristic feature is that the drive shaft of the drive motor (14) passes through the surface of the upper housing (12) and is sleeved with a bearing seat (2). The bearing seat (2) is fixedly installed inside the bearing (3) and an oil seal (4) sleeved on the drive shaft of the drive motor (14). An output shaft (5) is rotatably connected at the connection between the upper housing (12) and the lower housing (13). A cam (6) is fixedly sleeved on the surface of the output shaft (5). An oil pump assembly (7) is provided inside the lower housing (13), and the cam (6) contacts the oil pump assembly (7). The lower housing (13) is connected to the bearing seat (2) through an oil pipe (8). A transmission mechanism (9) is provided between the drive shaft of the drive motor (14) and the output shaft (5). The transmission mechanism (9) includes: a driving spiral bevel gear (91), a driven spiral bevel gear (92), a driving transmission gear (93), and a driven transmission gear (94). The active spiral bevel gear (91), driven spiral bevel gear (92), active transmission gear (93), and driven transmission gear (94) all rotate inside the upper housing (12). The active transmission gear (93) is fixedly sleeved on one end of the drive shaft of the drive motor (14) that passes through the bearing seat (2). The driven spiral bevel gear (92) is fixedly sleeved on the surface of the output shaft (5). The driven transmission gear (94) and the active spiral bevel gear (91) are fixedly sleeved on the same rotating shaft (95). The active transmission gear (93) meshes with the driven transmission gear (94), and the active spiral bevel gear (91) meshes with the driven spiral bevel gear (92). The oil pump assembly (7) includes: piston sleeve (71), piston (72), piston return spring (73), large check valve (74), damping plug (75), small check valve (76) and damping spring (77). The piston sleeve (71) has three annular grooves (711) on its outer periphery. The three annular grooves (711) are fitted with a first O-ring (712), a second O-ring (713) and a third O-ring (714) from top to bottom. The external thread at the bottom of the piston sleeve (71) is threaded to the internal thread at the bottom of the lower housing (13). The top of the piston sleeve (71) is provided with a telescopic groove (715) extending to the space between the second O-ring (713) and the third O-ring (714). The bottom of the piston (72) is inserted into the telescopic groove (715). The cam (6) contacts the top of the piston (72). The damping spring (77) and the small one-way valve (76) are located inside the piston (72). The piston return spring (73) and the large one-way valve (74) are located inside the telescopic groove (715). The damping plug (75) is inserted into the bottom of the piston (72). The end face of the bottom of the damping plug (75) is fixedly connected to the large one-way valve (74) through the piston return spring (73). The oil pump assembly (7) is provided with an oil hole mechanism (10) for oil suction and oil pressure.

2. The lubrication device for a high-speed bearing and seal of a gearbox according to claim 1, characterized in that: The piston (72) has a stepped groove (721) at its bottom and a deep hole (722) communicating with the stepped groove (721) inside the piston (72). The damping plug (75) is fixedly installed in the stepped groove (721). One end of the damping spring (77) is fixedly installed on the inner wall at the top of the deep hole (722), and the small one-way valve (76) is fixedly installed on the other end of the damping spring (77).

3. The lubrication device for a high-speed bearing and seal of a gearbox according to claim 2, characterized in that: The oil hole mechanism (10) includes: a first oil hole (101), a second oil hole (102) and a third oil hole (103); The first oil hole (101) is located on the outer wall of the piston sleeve (71) between the first O-ring (712) and the second O-ring (713). The first oil hole (101) communicates with the inner wall of the side of the expansion groove (715). The second oil hole (102) is located on the outer wall of the piston sleeve (71) between the second O-ring (713) and the third O-ring (714). The second oil hole (102) communicates with the inner wall of the bottom of the expansion groove (715). The third oil hole (103) is located on the side of the piston (72), and the third oil hole (103) communicates with the side of the deep hole (722). The damping plug (75) has a through hole (751) in the middle, the bottom end of the small one-way valve (76) is close to the top end of the through hole (751), the second oil hole (102) is connected to the expansion groove (715) with a chamfer (104), and the bottom end of the large one-way valve (74) is close to the chamfer (104). The area between the second O-ring (713), the third O-ring (714), the lower housing (13) and the piston sleeve (71) is set as the first cavity, and the lower housing (13) is provided with an oil suction hole communicating with the first cavity; The area between the first O-ring seal (712), the second O-ring seal (713), the lower housing (13) and the piston sleeve (71) is set as a second cavity, and the lower housing (13) is provided with an oil outlet hole communicating with the second cavity.

4. The lubrication device for a high-speed bearing and seal of a gearbox according to claim 3, characterized in that: The cross-sectional shape of the second oil hole (102) is set to a T-shape.

5. The lubrication device for a high-speed bearing and seal of a gearbox according to claim 4, characterized in that: The motor mounting bracket (11) has a process hole (111), the bearing seat (2) has a side hole (21), one end of the oil pipe (8) passes through the process hole (111) and is connected to the side hole (21), and the other end of the oil pipe (8) is connected to the oil outlet hole.

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