A sliding bearing assembly with an automatic oil replenishment function

Abstract

The present invention discloses a sliding bearing assembly with an automatic oil replenishment function, which relates to the technical field of sliding bearings and includes a bearing seat assembly, as well as an oil storage assembly and an automatic oil replenishment mechanism integrated on the bearing seat assembly; the bearing seat assembly is composed of a lower bearing seat and an upper bearing seat that are detachably connected. A lower bearing bush for carrying a transmission shaft is provided inside the lower bearing seat, and an upper bearing bush that forms a shaft hole with the lower bearing bush is provided inside the upper bearing seat. An oil replenishment hole is penetrated through the center of the top of the upper bearing bush; the oil storage assembly includes an oil storage cylinder fixed to the top of the upper bearing seat, a piston chamber provided inside the upper bearing seat, and a first channel connecting the oil storage cylinder and the piston chamber. In the present invention, when the oil film is sufficient, the piston stagnates due to resistance and the oil replenishment pauses. Only when the resistance decreases due to the consumption of the oil film, the piston continues to move downward to complete the oil replenishment. The oil replenishment frequency is dynamically matched with the actual consumption of the lubricating oil, completely avoiding over-lubrication and prolonging the bearing life.

Description

Technical Field

[0001] The present invention relates to the technical field of sliding bearings, and particularly to a sliding bearing assembly with an automatic oil replenishment function. Background Art

[0002] During the long-term operation of traditional sliding bearings, due to lubricating oil consumption or oil film rupture, the friction between the bearing bush and the transmission shaft is likely to increase, leading to wear, temperature rise, and even jamming failures. In the prior art, the oil replenishment methods are mostly manual periodic filling or relying on an external oil supply system. Among them, manual oil replenishment has low efficiency and requires frequent shutdown for maintenance, affecting the continuous operation of the equipment; while the external oil supply system relies on components such as electric pumps and sensors, with high costs and large energy consumption.

[0003] After retrieval, the patent with the authorized announcement number CN118622860B discloses a sliding bearing assembly for wind power equipment with an automatic oil replenishment device, which realizes the intermittent replenishment of lubricating oil through an oil storage cavity, a sliding rod, and a driving assembly, and does not require an external oil supply system. However, this technology still has the following defects:

[0004] 1. The oil replenishment process of this patent relies on electromagnetic valves and liquid level sensors, requires external energy and an electric control system for support, has reduced reliability under harsh working conditions (such as high humidity and low temperature), and increases the system cost.

[0005] 2. This patent uses the inclined surface cooperation between the main shaft driving rod and the abutting rod to forcibly trigger the periodic movement of the oil injection plate, resulting in the following problems:

[0006] 1) Excessive lubrication and damage to bearing life: Every time the main shaft rotates one week, the driving rod contacts the abutting rod, forcing the oil injection plate to complete an oil replenishment action. This fixed-frequency oil replenishment mechanism cannot dynamically adjust according to the actual lubrication requirements, easily leading to excessive accumulation of lubricating oil, which instead increases the frictional resistance and accelerates bearing wear.

[0007] 2) Frequent movement of mechanical components causes fatigue: Components such as the oil injection plate and the sliding rod reciprocate at a high frequency with the rotation speed of the main shaft. Long-term operation is likely to cause mechanical fatigue, wear, and even fracture, increasing the maintenance cost. Summary of the Invention

[0008] The purpose of the present invention is to provide a sliding bearing assembly with an automatic oil replenishment function to solve the problems raised in the above background art.

[0009] To achieve the above-mentioned invention purpose, the present invention adopts the following technical solutions:

[0010] A sliding bearing assembly with an automatic oil replenishment function provided by the present invention includes a bearing seat assembly, as well as an oil storage component and an automatic oil replenishment mechanism integrated on the bearing seat assembly;

[0011] The bearing seat assembly is composed of a lower bearing seat and an upper bearing seat which are detachably connected. A lower bearing bush for carrying a transmission shaft is arranged inside the lower bearing seat, and an upper bearing bush which forms a shaft hole together with the lower bearing bush is arranged inside the upper bearing seat. An oil replenishing hole is arranged through the center of the top of the upper bearing bush;

[0012] The oil storage assembly includes an oil storage cylinder fixed to the top of the upper bearing seat, a piston chamber arranged inside the upper bearing seat, a first passage communicating the oil storage cylinder and the piston chamber, and a second passage communicating the piston chamber and the oil replenishing hole. A first one-way valve leading to the piston chamber is arranged in the first passage, and a second one-way valve leading to the oil replenishing hole is arranged in the second passage;

[0013] The automatic oil replenishing mechanism includes a piston slidably arranged in the piston chamber, a lifting assembly for driving the piston to reciprocate, and an unlockable locking assembly for controlling the locking and releasing of the lifting assembly; a first pre-tightening spring is arranged between the bottom of the piston and the bottom of the piston chamber; the lifting assembly includes a clamping disc capable of automatic unlocking, a second pre-tightening spring for pushing the clamping disc to reset, and a transmission structure for converting the rotational power of the transmission shaft into the linear motion of the clamping disc. The clamping disc clamps the piston at the lower terminal position and disengages from the piston at the upper terminal position; the unlockable locking assembly locks the clamping disc when the clamping disc moves to the upper terminal position and releases the locking when the piston moves to the end of the compression stroke.

[0014] Further, the transmission structure includes an L-shaped transmission rod vertically fixed to the top of the clamping disc. The L-shaped transmission rod includes a vertical section vertically penetrating the top wall of the piston chamber and a horizontal section connected to the top end of the vertical section and extending above the transmission shaft. The transmission structure also includes a trigger rod fixed to the transmission shaft and a trigger piece fixed to the end of the horizontal section far from the vertical section. The trigger piece is arranged corresponding to the trigger rod. A first pushing inclined surface is arranged at the end of the trigger rod far from the transmission shaft, and a second pushing inclined surface cooperating with the first pushing inclined surface is arranged at the end of the trigger piece far from the horizontal section.

[0015] Further, a stepped mounting hole extending radially along the shaft hole is vertically opened downward on the top of the upper bearing seat. The stepped mounting hole includes a lower cylindrical part and an upper square part from top to bottom. A hydraulic shell is detachably fixed inside the upper square part. A hydraulic chamber is formed inside the hydraulic shell. A through hole communicating the hydraulic chamber and the lower cylindrical part is opened at the bottom of the hydraulic shell. The hydraulic chamber, the through hole and the lower cylindrical part form a piston chamber. The first passage and the second passage are both communicated with the lower cylindrical part. The piston is slidably arranged in the hydraulic chamber.

[0016] Furthermore, the unlockable locking assembly includes a strip-shaped groove arranged on an outer wall of one side of the hydraulic shell, a U-shaped strip is horizontally slidably arranged in the strip groove, the U-shaped strip includes an upper locking block, a lower locking block, and a connecting strip connected between the upper locking block and the lower locking block, and the ends of the upper locking block and the lower locking block away from the connecting strip both extend through the hydraulic chamber, the upper locking block is fixed with a first right-angled triangle block at one end away from the connecting strip, and the inclined surface of the first right-angled triangle block is arranged downward, and the lower locking block is fixed with a second right-angled triangle block at one end away from the connecting strip, and the inclined surface of the second right-angled triangle block is arranged upward, and a first return spring is arranged between the side of the connecting strip close to the hydraulic chamber and the side surface of the strip groove, when the first return spring is in normal state, the first right-angled triangle block and the second right-angled triangle block are both in the hydraulic chamber, and the clamping plate includes a sliding plate slidably arranged in the hydraulic chamber above the piston, and a first clamping groove arranged on the side of the sliding plate close to the strip groove, and a clamping structure for clamping the piston.

[0017] Furthermore, an embedding groove is provided on the top of the hydraulic chamber near the side of the strip groove, a second clamping groove is provided on the side of the embedding groove away from the strip groove, a protrusion corresponding to the embedding groove is provided on the bottom of the sliding plate, a component installation cavity is provided in the protrusion, the clamping structure is integrated in the component installation cavity, the clamping structure includes a third locking block arranged through the component installation cavity away from the side of the strip groove, a third right-angled triangle block is arranged on the side of the third locking block away from the strip groove, the inclined surface of the third right-angled triangle block is arranged downward, and the component installation cavity is arranged through the first A card-connecting groove, a square trigger block is slidably arranged in the first card-connecting groove, the square trigger block is located above the third locking block, and the square trigger block and the third locking block are connected through a gear structure, the gear structure includes a gear rotatably arranged in the component mounting cavity, a first rack fixed at the bottom of the square trigger block, and a second rack fixed at the top of the third locking block, the first rack and the second rack are both meshed with the gear, and a second reset spring is also arranged between the third locking block and the inner wall of the component mounting cavity, and when the second reset spring is in normal state, the third right-angled triangle block is on one side of the protrusion.

[0018] Furthermore, a pressure balance hole is provided at the top of the oil storage cylinder, and a breathable dustproof film is provided in the pressure balance hole.

[0019] Furthermore, an externally threaded tube is provided at the bottom of the oil storage cylinder, an internally threaded seat is provided at the top of the upper bearing seat, and the interior of the internally threaded seat is communicated with the top of the first channel.

[0020] Furthermore, a liquid level sensor is arranged in the oil storage cylinder.

[0021] Furthermore, smooth coatings are provided on the first pushing inclined surface and the second pushing inclined surface.

[0022] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0023] 1. When the oil film is sufficient in the present invention, the piston stalls due to resistance and the oil replenishment pauses. Only when the resistance decreases due to the consumption of the oil film, the piston continues to move downward to complete the oil replenishment. The oil replenishment frequency is dynamically matched with the actual consumption of the lubricating oil, completely avoiding over-lubrication and extending the bearing life.

[0024] 2. The unlockable locking assembly in the present invention is linked by a bidirectional right-angled triangular block and a spring, and the locking is released only at the end of the piston compression stroke. If the oil film resistance prevents the piston from moving downward, the unlockable locking assembly maintains the fixed clamping disc and pauses the oil replenishment until the resistance decreases.

[0025] 3. The present invention adopts a split hydraulic housing, a quick-release oil storage cylinder and a clamping and locking structure. The hydraulic housing can be independently replaced, and the oil storage cylinder can be quickly assembled and disassembled through a threaded quick-release structure. When maintaining, it is not necessary to disassemble the bearing seat, greatly shortening the downtime.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0028] Figure 1 is the overall structural schematic diagram of the present invention;

[0029] Figure 2 is the top view structural schematic diagram of the present invention;

[0030] Figure 3 is Figure 2 the B-B direction structural schematic diagram of

[0031] Figure 4 is Figure 3 the partial schematic diagram at A of

[0032] Figure 5 is Figure 4 the partial structural schematic diagram at B of

[0033] Figure 6 is the sectional structural schematic diagram of the piston and the clamping disc of the present invention;

[0034] Figure 7 is the structural schematic diagram of the first state of the piston and the clamping disc of the present invention;

[0035] Figure 8 is a schematic structural diagram of the second state of the piston and the clamping disc of the present invention;

[0036] Figure 9 is a schematic structural diagram of the third state of the piston and the clamping disc of the present invention;

[0037] Figure 10 is a schematic structural diagram of the fourth state of the piston and the clamping disc of the present invention.

[0038] In the figure:

[0039] 1. Bearing seat assembly; 2. Oil storage assembly; 3. Automatic oil replenishing mechanism; 4. Lower bearing seat; 5. Upper bearing seat; 6. Transmission shaft; 7. Lower bearing bush; 8. Shaft hole; 9. Upper bearing bush; 10. Oil replenishing hole; 11. Oil storage cylinder; 12. Piston cavity; 13. First channel; 14. Second channel; 15. First one-way valve; 16. Second one-way valve; 17. Piston; 19. Unlockable locking assembly; 20. First pre-tightening spring; 21. Clamping disc; 22. Second pre-tightening spring; 23. Transmission structure; 24. L-shaped transmission rod; 25. Vertical section; 26. Horizontal section; 27. Trigger rod; 28. Trigger piece; 29. First pushing inclined surface; 30. Second pushing inclined surface; 32. Lower cylindrical part; 33. Upper square part; 34. Hydraulic shell; 35. Hydraulic cavity; 36. Through hole; 37. Strip-shaped groove; 38. U-shaped strip; 39. Upper locking block; 40. Lower locking block; 41. Connecting strip; 42. First right-angled triangular block; 43. Second right-angled triangular block; 44. First return spring; 45. Sliding plate; 46. First clamping groove; 47. Clamping structure; 48. Embedding groove; 49. Second clamping groove; 50. Protrusion; 51. Component installation cavity; 52. Third locking block; 53. Third right-angled triangular block; 54. Square trigger block; 55. Gear structure; 56. Gear; 57. First rack; 58. Second rack; 59. Second return spring. Detailed implementation manners

[0040] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Please refer to Figures 1 - 10 , the present invention provides a sliding bearing assembly with an automatic oil replenishing function, including a bearing seat assembly 1, and an oil storage assembly 2 and an automatic oil replenishing mechanism 3 integrated on the bearing seat assembly 1.

[0042] As Figure 1 shown, the bearing housing assembly 1 is composed of a lower bearing housing 4 and an upper bearing housing 5 which are detachably connected. A lower bearing bush 7 for supporting a transmission shaft 6 is arranged inside the lower bearing housing 4, and an upper bearing bush 9 which forms a shaft hole 8 with the lower bearing bush 7 is arranged inside the upper bearing housing 5. As Figure 4 shown, an oil replenishing hole 10 is penetrated through the center of the top of the upper bearing bush 9.

[0043] As Figure 4 shown, the oil storage assembly 2 includes an oil storage cylinder 11 fixed to the top of the upper bearing housing 5, a piston chamber 12 arranged inside the upper bearing housing 5, a first channel 13 connecting the oil storage cylinder 11 and the piston chamber 12, and a second channel 14 connecting the piston chamber 12 and the oil replenishing hole 10. A first one-way valve 15 leading to the piston chamber 12 is arranged inside the first channel 13, and a second one-way valve 16 leading to the oil replenishing hole 10 is arranged inside the second channel 14.

[0044] Combined with Figure 4 and Figure 5 shown, the automatic oil replenishing mechanism 3 includes a piston 17 slidably arranged inside the piston chamber 12, a lifting assembly for driving the piston 17 to reciprocate, and an unlockable locking assembly 19 for controlling the locking and releasing of the lifting assembly;

[0045] Combined with Figure 4 and Figure 5 shown, a first pre-tightening spring 20 is arranged between the bottom of the piston 17 and the bottom of the piston chamber 12; the lifting assembly includes a clamping disc 21 capable of automatic unlocking, a second pre-tightening spring 22 for pushing the clamping disc 21 to reset, and a transmission structure 23 (as Figure 1 shown) for converting the rotational power of the transmission shaft 6 into the linear motion of the clamping disc 21. The clamping disc 21 clamps the piston 17 at the lower terminal position (as Figure 7 shown), and disengages from the piston 17 at the upper terminal position (as Figure 9 shown); the unlockable locking assembly 19 locks the clamping disc 21 when the clamping disc 21 moves to the upper terminal position (as Figure 9 shown), and unlocks when the piston 17 moves to the end of the compression stroke (as Figure 10 shown).

[0046] The present invention realizes mechanical linkage through the transmission structure 23 and the transmission shaft 6, and realizes the on-demand replenishment of lubricating oil without relying on external energy or manual intervention.

[0047] The specific working principle: when the transmission shaft 6 rotates, its power drives the clamping disc 21 in the lifting assembly to slide upward from the lower terminal position to the upper terminal position through the transmission structure 23. During this process, the clamping disc 21 drives the piston 17 to move upward synchronously against the resistance of the second pre-tightening spring 22 (asFigure 7 and Figure 8 As shown in Figure 8 , the first pre-tightening spring 20 is stretched to store energy. At the same time, a negative pressure is generated in the piston chamber 12 due to the expansion of its volume, prompting the lubricating oil in the oil storage cylinder 11 to be continuously sucked into the piston chamber 12 through the first channel 13 (including the first one-way valve 15) (as shown in Figure 8 ). Figure 7 and Figure 8 As shown in Figure 8 , when the clamping disc 21 moves to the upper terminal position, the unlockable locking assembly 19 fixes it, and the clamping disc 21 disengages from the piston 17 (as shown in Figure 8 ). Figure 9 As shown in Figure 9 , the piston 17 begins to slowly move downward under the elastic restoring force of the first pre-tightening spring 20, pressing the lubricating oil in the piston chamber 12 into the oil replenishing hole 10 through the second channel 14 (including the second one-way valve 16), realizing the quantitative injection of lubricating oil to the bearing friction surface.

[0048] It should be noted that this device has an adaptive adjustment ability. If there is sufficient lubricating oil between the bearing and the transmission shaft 6, when the piston 17 moves downward, it is blocked by the oil film pressure and the oil replenishing action pauses; as the lubricating oil is consumed and the resistance decreases, the piston 17 continues to move downward until the end of the compression stroke, and the unlockable locking assembly 19 automatically releases the fixation of the clamping disc 21. The clamping disc 21 quickly resets to the lower terminal position under the push of the second pre-tightening spring 22 (as shown in Figure 10 ), reconnecting with the piston 17 and triggering the next oil replenishing cycle. This design ensures the dynamic matching of lubricating oil supply and actual demand, avoiding over-supply or under-supply. Figure 10 As shown in Figure 10 , reconnecting with the piston 17 and triggering the next oil replenishing cycle. This design ensures the dynamic matching of lubricating oil supply and actual demand, avoiding over-supply or under-supply.

[0049] Combined with Figure 1 and Figure 4 As shown in Figure 1 and Figure 4 , in this embodiment, the transmission structure 23 includes an L-shaped transmission rod 24 vertically fixed on the top of the clamping disc 21. The L-shaped transmission rod 24 includes a vertical section 25 vertically penetrating the top wall of the piston chamber 12, and a horizontal section 26 connected to the top end of the vertical section 25 and extending above the transmission shaft 6. The transmission structure 23 also includes a trigger rod 27 fixed on the transmission shaft 6 and a trigger piece 28 fixed at the end of the horizontal section 26 away from the vertical section 25. The trigger piece 28 is correspondingly arranged with the trigger rod 27. A first pushing inclined surface 29 is arranged at one end of the trigger rod 27 away from the transmission shaft 6, and a second pushing inclined surface 30 cooperating with the first pushing inclined surface 29 is arranged at one end of the trigger piece 28 away from the horizontal section 26.

[0050] Based on the above settings, in this embodiment, the transmission structure 23 realizes power transmission through the cooperation between the trigger piece 28 connected to the L-shaped transmission rod 24 and the inclined surface of the trigger rod 27. Specifically, when the transmission shaft 6 rotates, the trigger rod 27 fixed on the transmission shaft 6 rotates accordingly. The first pushing inclined surface 29 at the end of the trigger rod 27 periodically contacts the second pushing inclined surface 30 of the trigger piece 28. When the two pushing inclined surfaces come into contact, the rotational force of the trigger rod 27 is converted into a vertically upward thrust of the L-shaped transmission rod 24 through inclined surface sliding, driving the clamping disc 21 to rise vertically from the lower terminal position until it moves to the upper terminal position and is locked by the unlockable locking assembly 19, completing the oil suction stroke of the piston 17. At this time, the trigger rod 27 is disengaged from the trigger piece 28 to avoid interference when the transmission shaft 6 continues to rotate. When the unlockable locking assembly 19 automatically releases the fixation of the clamping disc 21, the clamping disc 21 will quickly reset to the lower terminal position under the push of the second pre-tightening spring 22, waiting for the trigger in the next rotation cycle.

[0051] As Figure 4 shown, in this embodiment, a stepped mounting hole extending radially along the shaft hole 8 is vertically opened downward from the top of the upper bearing seat 5. The stepped mounting hole includes a lower cylindrical portion 32 and an upper square portion 33 from top to bottom. A hydraulic housing 34 is detachably fixed inside the upper square portion 33. A hydraulic chamber 35 is formed inside the hydraulic housing 34. A through hole 36 connecting the hydraulic chamber 35 and the lower cylindrical portion 32 is opened at the bottom of the hydraulic housing 34. The hydraulic chamber 35, the through hole 36, and the lower cylindrical portion 32 form a piston chamber 12. Both the first channel 13 and the second channel 14 are connected to the lower cylindrical portion 32. The piston 17 is slidably disposed inside the hydraulic chamber 35.

[0052] Based on the above settings, in this embodiment, through the design of the stepped mounting hole and the split hydraulic housing 34, the oil circuit is integrated inside the bearing seat, reducing the external pipeline layout. Moreover, the hydraulic housing 34 can be independently disassembled and replaced without decomposing the main structure of the bearing seat, significantly reducing the maintenance cost and downtime.

[0053] As Figure 5As shown, in this embodiment, the unlockable locking assembly 19 includes a strip-shaped groove 37 provided on an outer wall of one side of the hydraulic housing 34. A U-shaped strip 38 is horizontally slidably arranged in the strip-shaped groove 37. The U-shaped strip 38 includes an upper locking block 39, a lower locking block 40, and a connecting strip 41 connecting the upper locking block 39 and the lower locking block 40. One ends of the upper locking block 39 and the lower locking block 40 away from the connecting strip 41 both penetrate and extend into the hydraulic chamber 35. A first right-angled triangular block 42 is fixed to one end of the upper locking block 39 away from the connecting strip 41, and the inclined surface of the first right-angled triangular block 42 faces downward. A second right-angled triangular block 43 is fixed to one end of the lower locking block 40 away from the connecting strip 41, and the inclined surface of the second right-angled triangular block 43 faces upward. A first return spring 44 is arranged between one side of the connecting strip 41 close to the hydraulic chamber 35 and the side surface of the strip-shaped groove 37. When the first return spring 44 is in a normal state, both the first right-angled triangular block 42 and the second right-angled triangular block 43 are in the hydraulic chamber 35. The clamping disc 21 includes a sliding plate 45 slidably arranged in the hydraulic chamber 35 above the piston 17, a first clamping groove 46 arranged on one side of the sliding plate 45 close to the strip-shaped groove 37, and a clamping structure 47 for clamping the piston 17.

[0054] Based on the above settings in this embodiment, the unlockable locking assembly 19 realizes the precise locking and rapid release of the clamping disc 21 and the piston 17 through the dynamic linkage of two-way inclined surface locking and spring reset. Specifically, when the clamping disc 21 is pulled up by the L-shaped transmission rod 24, the upper edge of its sliding plate 45 contacts the first right-angled triangular block 42 (with the inclined surface facing downward). During the upward movement of the clamping disc 21, the upper edge of the sliding plate 45 slides along the inclined surface of the first right-angled triangular block 42, forcing the U-shaped strip 38 to move outward from the hydraulic housing 34 against the elastic force of the first return spring 44 to make way for the clamping disc 21. After the clamping disc 21 reaches the upper terminal position, the first return spring 44 pushes the U-shaped strip 38 to reset, and the first right-angled triangular block 42 is inserted into the first clamping groove 46, and locking is formed through the right-angled surface of the first right-angled triangular block 42. At this time, the clamping structure 47 of the clamping disc 21 is separated from the piston 17, and the piston 17 is slowly pressed down under the action of the first pre-tightening spring 20 to complete the compression and ejection of the lubricating oil. When the piston 17 moves down to the end of the compression stroke, its lower edge contacts the second right-angled triangular block 43 (with the inclined surface facing upward). The continuous downward pressure of the piston 17 pushes the second right-angled triangular block 43 to slide outward, driving the entire U-shaped strip 38 to move outward, so that the first right-angled triangular block 42 is synchronously separated from the first clamping groove 46, and the locked state is released; the clamping disc 21 quickly resets to the lower terminal position under the energy storage release of the second pre-tightening spring 22, and its clamping structure 47 is re-connected with the piston 17 to prepare for the next cycle.

[0055] Combined with Figure 5 and Figure 6As shown, in this embodiment, an embedding groove 48 is provided on the top of the piston groove near the side of the strip groove 37, and a second clamping groove 49 is provided on the side of the embedding groove 48 away from the strip groove 37. A protrusion 50 corresponding to the embedding groove 48 is provided at the bottom of the sliding plate 45, and a component installation cavity 51 is provided in the protrusion 50. The clamping structure 47 is integrated in the component installation cavity 51, and the clamping structure 47 includes a third locking block 52 that is arranged through the component installation cavity 51 on the side away from the strip groove 37, and the third locking block 52 is arranged on the side away from the strip groove 37. The inclined surface of the third right-angled triangle block 53 is arranged downward, and the component installation cavity 51 is arranged through the side close to the strip groove 37. A snap-in groove 46, in which a square trigger block 54 is slidably arranged, the square trigger block 54 is located above the third locking block 52, and the square trigger block 54 and the third locking block 52 are connected by a gear structure 55, the gear structure 55 includes a gear 56 rotatably arranged in the component installation cavity 51, a first rack 57 fixed at the bottom of the square trigger block 54, and a second rack 58 fixed at the top of the third locking block 52, the first rack 57 and the second rack 58 are both engaged with the gear 56, and a second reset spring 59 is also arranged between the third locking block 52 and the inner wall of the component installation cavity 51, when the second reset spring 59 is in normal state, the third right-angled triangle block 53 is on one side of the protrusion 50.

[0056] Based on the above arrangement, the clamping structure 47 of this embodiment realizes multi-stage locking control through the compound linkage of gear transmission and inclined locking. When the protruding portion 50 of the sliding plate 45 is embedded in the embedding groove 48, the third right-angled triangle block 53 (with the inclined surface facing downward) extends outward under the thrust of the second return spring 59, and its vertical surface forms a rigid abutment with the upper side wall of the second clamping groove 49, thereby completing the preliminary locking of the sliding plate 45 by utilizing the geometric self-locking effect. At this time, if the clamping plate 21 drives the piston 17 to move to the upper terminal position, the third right-angled triangle block 53 (with the inclined surface facing downward) extends outward under the thrust of the second return spring 59, and its vertical surface forms a rigid abutment with the upper side wall of the second clamping groove 49, thereby completing the preliminary locking of the sliding plate 45 by utilizing the geometric self-locking effect. During the process of the right-angled triangle block 42 being embedded in the first clamping groove 46, the first right-angled triangle block 42 pushes and presses the square trigger block 54, forcing the square trigger block 54 to slide toward the third locking block 52, and the gear 56 is driven to rotate counterclockwise through the first rack 57, driving the second rack 58 and the third locking block 52 to retract into the component installation cavity 51, and the third right-angled triangle block 53 is then separated from the second clamping groove 49, and the locking state of the sliding plate 45 is automatically released, and is quickly reset under the release of the stored energy of the second preload spring 22. On the contrary, when the sliding plate 45 is reset to the lower terminal position, the inclined surface of the third right-angled triangle block 53 contacts the edge of the embedded groove 48, and is retracted into the component installation cavity 51 after being squeezed. After the sliding plate 45 is fully in place, the second reset spring 59 pushes the third right-angled triangle block 53 to extend out again, so that the third right-angled triangle block 53 is clamped into the second clamping groove 49, forming a closed-loop lock.

[0057] In this embodiment, a pressure balance hole is provided at the top of the oil storage cylinder 11, and a breathable dust-proof film is arranged in the pressure balance hole. When a negative pressure is generated inside the oil storage cylinder 11 due to lubricating oil consumption or temperature change, external air penetrates into the cylinder through the microporous structure of the breathable dust-proof film to balance the internal and external pressure differences, avoiding an increase in the oil suction and delivery resistance caused by the negative pressure or deformation and oil leakage of the seal; conversely, when the internal oil expands due to heat or the piston returns oil, resulting in an increase in pressure, the excess gas slowly escapes outward through the breathable dust-proof film, preventing the accumulation of pressure inside the cylinder and causing seal failure. The breathable dust-proof film, through surface hydrophobic treatment and a multi-layer filtering structure, while allowing air to flow freely, blocks the intrusion of external dust, oil stains, and moisture into the interior of the oil storage cylinder 11, ensuring that the lubricating oil remains clean and stable for a long time.

[0058] In this embodiment, an external threaded pipe is provided at the bottom of the oil storage cylinder 11, and an internal threaded seat is provided at the top of the upper bearing seat 5. The interior of the internal threaded seat communicates with the top end of the first channel 13. When the external threaded pipe at the bottom of the oil storage cylinder 11 is screwed into the internal threaded seat at the top of the upper bearing seat 5, axial compression sealing is formed between the external threaded pipe and the internal threaded seat through screw tightening. At the same time, the internal channel of the external threaded pipe is accurately docked with the first channel 13 inside the internal threaded seat, ensuring a seamless connection of the lubricating oil delivery path; during disassembly, the oil storage cylinder 11 is rotated in the reverse direction, and the external threaded pipe and the internal threaded seat are quickly separated.

[0059] In this embodiment, a liquid level sensor (not shown) is arranged in the oil storage cavity.

[0060] In this embodiment, smooth coatings are provided on the first pushing inclined surface 29 and the second pushing inclined surface 30.

[0061] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A sliding bearing assembly with automatic oil replenishment function, characterized in that: It includes a bearing seat assembly, an oil storage assembly and an automatic oil replenishing mechanism integrated on the bearing seat assembly; The bearing seat assembly is composed of a detachably connected lower bearing seat and an upper bearing seat, the inner side of the lower bearing seat is provided with a lower bearing shell for carrying the transmission shaft, the inner side of the upper bearing seat is provided with an upper bearing shell for forming an axial hole with the lower bearing shell, and the top center of the upper bearing shell is penetrated with an oil filling hole; The oil storage assembly includes an oil storage cylinder fixed to the top of the upper bearing seat, a piston cavity arranged in the upper bearing seat, a first channel connecting the oil storage cylinder and the piston cavity, and a second channel connecting the piston cavity and the oil replenishing hole, wherein a first one-way valve connected to the piston cavity is arranged in the first channel, and a second one-way valve connected to the oil replenishing hole is arranged in the second channel; The automatic oil replenishing mechanism includes a piston slidably arranged in the piston cavity, a lifting assembly driving the piston to reciprocate, and an unlockable locking assembly controlling the locking and release of the lifting assembly; a first preload spring is provided between the bottom of the piston and the bottom of the piston cavity; the lifting assembly includes a clamping plate that can be automatically unlocked, a second preload spring pushing the clamping plate to reset, and a transmission structure converting the rotational power of the transmission shaft into linear motion of the clamping plate, the clamping plate clamps the piston at the lower terminal position and disengages from the piston at the upper terminal position; the unlockable locking assembly locks the clamping plate when the clamping plate moves to the upper terminal position, and releases the lock when the piston moves to the end of the compression stroke.

2. The sliding bearing assembly with automatic oil replenishment function according to claim 1 is characterized in that: The transmission structure includes an L-shaped transmission rod vertically fixed on the top of the clamping plate, the L-shaped transmission rod includes a vertical section vertically penetrating the top wall of the piston chamber, and a horizontal section connected to the top of the vertical section and extending to the top of the transmission shaft, the transmission structure also includes a trigger rod fixed on the transmission shaft and a trigger plate fixed at one end of the horizontal section away from the vertical section, the trigger plate is arranged corresponding to the trigger rod, a first push inclined surface is arranged at one end of the trigger rod away from the transmission shaft, and a second push inclined surface matching the first push inclined surface is arranged at one end of the trigger plate away from the horizontal section.

3. The sliding bearing assembly with automatic oil replenishment function according to claim 1, characterized in that: A stepped mounting hole extending radially along the shaft hole is vertically opened downward from the top of the upper bearing seat, and the stepped mounting hole includes a lower columnar portion and an upper square portion from top to bottom. A hydraulic shell is detachably fixed in the upper square portion, and a hydraulic cavity is formed inside the hydraulic shell. A through hole connecting the hydraulic cavity and the lower columnar portion is opened at the bottom of the hydraulic shell. The hydraulic cavity, the through hole and the lower columnar portion form a piston cavity. The first channel and the second channel are both connected to the lower columnar portion, and the piston is slidably arranged in the hydraulic cavity.

4. The sliding bearing assembly with automatic oil replenishment function according to claim 3 is characterized in that: The unlockable locking assembly includes a strip groove arranged on an outer wall of one side of the hydraulic shell, a U-shaped strip being horizontally slidably arranged in the strip groove, the U-shaped strip including an upper locking block, a lower locking block, and a connecting strip connected between the upper locking block and the lower locking block, one end of the upper locking block and the lower locking block away from the connecting strip both extend through the hydraulic chamber, the upper locking block is fixed with a first right-angled triangular block at one end away from the connecting strip, the inclined surface of the first right-angled triangular block is arranged downward, the lower locking block is fixed with a second right-angled triangular block at one end away from the connecting strip, the inclined surface of the second right-angled triangular block is arranged upward, a first return spring is arranged between the side of the connecting strip close to the hydraulic chamber and the side surface of the strip groove, when the first return spring is in normal state, the first right-angled triangular block and the second right-angled triangular block are both in the hydraulic chamber, the clamping plate includes a sliding plate slidably arranged in the hydraulic chamber above the piston, a first clamping groove arranged on the side of the sliding plate close to the strip groove, and a clamping structure for clamping the piston.

5. The sliding bearing assembly with automatic oil replenishment function according to claim 4 is characterized in that: The top of the hydraulic chamber is provided with an embedding groove on one side close to the strip groove, and the embedding groove is provided with a second clamping groove on the side away from the strip groove. The bottom of the sliding plate is provided with a protrusion corresponding to the embedding groove, and a component mounting cavity is provided in the protrusion. The clamping structure is integrated in the component mounting cavity, and the clamping structure includes a third locking block that is arranged through the component mounting cavity on the side away from the strip groove, and the third locking block is provided with a third right-angled triangle block on the side away from the strip groove, and the inclined surface of the third right-angled triangle block is arranged downward, and the first clamping structure is arranged through the component mounting cavity on the side close to the strip groove. A square trigger block is slidably arranged in the first clamping groove, the square trigger block is located above the third locking block, and the square trigger block and the third locking block are connected through a gear structure, the gear structure includes a gear rotatably arranged in the component mounting cavity, a first rack fixed at the bottom of the square trigger block, and a second rack fixed at the top of the third locking block, the first rack and the second rack are both meshed with the gear, and a second reset spring is also arranged between the third locking block and the inner wall of the component mounting cavity, and when the second reset spring is in normal state, the third right-angled triangle block is on one side of the protrusion.

6. The sliding bearing assembly with automatic oil replenishment function according to claim 1, characterized in that: A pressure balance hole is arranged on the top of the oil storage cylinder, and a breathable dustproof film is arranged in the pressure balance hole.

7. The sliding bearing assembly with automatic oil replenishment function according to claim 1, characterized in that: An externally threaded tube is arranged at the bottom of the oil storage cylinder, an internally threaded seat is arranged at the top of the upper bearing seat, and the interior of the internally threaded seat is communicated with the top end of the first channel.

8. The sliding bearing assembly with automatic oil replenishment function according to claim 1, characterized in that: A liquid level sensor is arranged in the oil storage cylinder.

9. The sliding bearing assembly with automatic oil replenishment function according to claim 2, characterized in that: The first push inclined surface and the second push inclined surface are provided with a smooth coating.

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