Self-lubricating system applied to industrial and mining equipment

Abstract

The invention discloses a self-lubricating system applied to industrial and mining equipment, and the self-lubricating system comprises a buffer unit which comprises a first buffer part and / or a second buffer part; the oil supply unit can be installed on a static component of the industrial and mining equipment directly or through a first buffering component, the oil supply unit comprises an oil storage bin used for storing lubricating grease and an oil supply device communicated with the oil storage bin and a to-be-lubricated point, and the oil supply device comprises a pressed structure; and the pressure applying unit comprises a pressure applying structure which can be directly mounted on the dynamic component or mounted on the dynamic component through a second buffer component. The pressed structure is arranged to be capable of repeatedly receiving pressure of the pressure applying structure when the dynamic component reciprocates relative to the static component and repeatedly triggering the oil feeder to supply lubricating grease in the oil storage bin to a to-be-lubricated point. The self-lubricating system not only can provide lubrication for industrial and mining equipment, but also can effectively buffer impact and absorb vibration, so that the operation reliability and durability of the self-lubricating system are improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of centralized lubrication systems. More specifically, the present invention relates to a self-lubricating system for industrial and mining equipment. Background Art

[0002] In industrial and mining equipment, such as dump trucks, excavators and other agricultural machinery, mining equipment, wind power generation, engineering vehicles or mining equipment, in order to achieve automatic lubrication of key moving parts (such as the pin shaft at the connection between the dump truck's car body and the frame), there is a self-lubricating device driven by the equipment's own movement in the relevant technology.

[0003] The working principle of a self-lubricating device is to install an oil supply unit containing an oil reservoir and an oil supply device on a static component of the equipment (such as the vehicle frame), and to install a pressure structure on a dynamic component that moves relative to it (such as the carriage). As the dynamic component reciprocates, the pressure structure repeatedly and directly squeezes or impacts the pressure-receiving structure of the oil supply device, causing the oil supply device to supply grease to the lubrication point.

[0004] However, this self-lubricating device has the following drawback: the pressure-applying and pressure-receiving structures are in rigid contact. This rigid contact generates severe shock and vibration. Sustained impact forces can easily cause fatigue damage within the lubricator due to the impact load, significantly reducing its stability and service life. Summary of the Invention

[0005] In order to solve one or more of the technical problems mentioned above, the present invention provides a self-lubricating system applied to industrial and mining equipment, which can not only provide synchronous lubrication for the industrial and mining equipment, but also effectively buffer impact and absorb vibration, thereby improving the operating reliability and durability of the self-lubricating system.

[0006] According to the present invention, a self-lubricating system for industrial and mining equipment is provided, wherein the industrial and mining equipment includes agricultural machinery equipment, mining equipment, wind power generation, engineering vehicles or mining equipment, and the agricultural machinery equipment, mining equipment, wind power generation, engineering vehicles or mining equipment include static components, dynamic components and points to be lubricated, and the dynamic components are configured to perform reciprocating motion relative to the static components. The self-lubricating system includes: a buffer unit, including a first buffer component and / or a second buffer component; an oil supply unit, which can be installed on one of the static component and the dynamic component directly or through the first buffer component, the oil supply unit includes an oil storage tank for storing grease and an oiler connected to the oil storage tank and the point to be lubricated, wherein the oiler includes a pressure structure; a pressure unit, which includes a pressure structure that can be installed on the other of the static component and the dynamic component directly or through the second buffer component. The pressure-bearing structure is configured to repeatedly receive the pressure of the pressure-applying structure when the dynamic component reciprocates relative to the static component, and repeatedly trigger the oil supply device to supply the grease in the oil storage tank to the lubrication point.

[0007] The self-lubricating system applied to industrial and mining equipment of the present invention has the advantages of simple structure, low cost, high reliability and no need for power or gas source, and can synchronize lubrication according to the actual operating conditions of the industrial and mining equipment (relative movement between dynamic components and static components).

[0008] Furthermore, the present invention innovatively incorporates a buffer unit (a first buffer component and / or a second buffer component) to establish a flexible connection between the oil supply unit / pressure unit and the mining equipment. This buffer unit effectively absorbs and dissipates the impact energy generated by the movement of dynamic components, converting sharp impact forces into gentle pressure transmission. This significantly reduces the mutual impact between the oil supply unit and the pressure unit, preventing premature damage due to impact fatigue. This significantly improves the operational stability and reliability of the self-lubricating device and the mining equipment, and extends the service life of the entire self-lubricating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0010] Figure 1 An application scenario of the self-lubricating system according to an embodiment of the present invention is shown;

[0011] Figure 2 An example of a self-lubricating system according to an embodiment of the present invention is shown;

[0012] Figure 3 Shown Figure 2 A partial enlarged view of the self-lubricating system shown;

[0013] Figure 4 Another example of a self-lubricating system according to an embodiment of the present invention is shown;

[0014] Figure 5 Shown Figure 4 The power part and pressure structure of the oil feeder of the self-lubricating system shown;

[0015] Figure 6 Shown Figure 4 The oil supply part of the oil feeder of the self-lubricating system shown.

[0016] Explanation of reference numerals: 100, self-lubricating system; 1, oil supply unit; 11, oil storage tank; 12, oil feeder; 121, pressure structure; 122, device body; 1221, correction protrusion; 123, oil supply cavity; 124, oil supply piston; 125, return spring; 126, oil supply channel; 1261, one-way valve; 127, limit assembly; 1271, limit groove; 1272, limit rod; 128, power part; 1281, power part body; 1282, power cavity; 1283, power piston; 1284, first return spring; 1286, limit assembly ;129. Oil supply part;1291. Oil supply part main body;1292. Oil supply cavity;1293. Oil supply piston;1294. Second return spring;1295. Oil supply channel;12951. One-way valve;2. Distributor;31. First buffer component;311. Shell;312. Shock absorber assembly;32. Second buffer component;6. Pressure unit;61. Pressure structure;611. Correction concave surface;612. Pressure point;62. Connecting nut;63. Connecting screw;200. Industrial and mining equipment;201. Dynamic component;202. Static component;203. Point to be lubricated. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are part of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0018] Figure 1 The embodiment of the present invention is shown to be applied to a self-lubricating system of industrial and mining equipment. Figure 1As shown, the industrial and mining equipment 200 includes agricultural machinery, mining equipment, wind power generation, engineering vehicles or mining equipment, wherein the engineering vehicles include dump trucks, excavators, loaders or forklifts, etc., and the mining equipment includes crushers, vibrating screens or conveying machinery, etc. As an application scenario, the engineering vehicle can be selected as a dump truck, which includes a frame as a static component 202, a car body as a dynamic component 201, and a hinge that can be used as a lubrication point 203 and is located between the car body and the frame. The self-lubricating system 100 can be arranged between the frame and / or the car body, and the car body can perform reciprocating flipping motion relative to the frame under the action of the hydraulic cylinder, thereby triggering the self-lubricating system 100 to implement oil supply.

[0019] like Figure 2 As shown, the self-lubricating system 100 includes an oil supply unit 1, a pressure unit 6 and a buffer unit. The buffer unit includes a first buffer component 31 and / or a second buffer component 32. Therefore, the oil supply unit 1 can be installed on one of the static component 202 and the dynamic component 201 directly or through the first buffer component 31, but is preferably installed on the static component 202 (frame) through the first buffer component 31. This can at least reduce the difficulty and cost of assembly. The oil supply unit 1 includes an oil storage tank 11 for storing grease and an oil supply device 12 connected to the oil storage tank 11 and the point to be lubricated 203 (such as a hose connection), wherein the oil supply device 12 includes a pressure-bearing structure 121.

[0020] The pressure-applying unit 6 includes a pressure-applying structure 61 that can be mounted directly on the other of the static component 202 and the dynamic component 201, or through a second buffer component 32. Preferably, the pressure-applying structure 61 is mounted on the dynamic component 201 (e.g., the vehicle body) through the second buffer component 32. The pressure-receiving structure 121 is configured to repeatedly receive pressure from the pressure-applying structure 61 when the dynamic component 201 reciprocates relative to the static component 202, repeatedly triggering the oil supply 12 to supply grease from the oil reservoir 11 to the lubrication points 203.

[0021] It can be seen from this that the self-lubricating system 100 can use the relative reciprocating motion of the dynamic component 201 and the static component 202 to prompt the pressure structure 121 of the pressure unit 6 to repeatedly trigger the oil supply unit 12 of the oil supply unit 1 to supply the grease in the oil storage tank 11 to the lubrication point 203. This design overcomes the limitations of relying on external energy, abandons power units such as electric motors, pneumatic pumps and complex control systems, and directly uses the equipment's own mechanical movement as the power source to trigger the oil supply. It not only simplifies the system structure, reduces costs and installation difficulty, but also avoids the risk of lubrication failure caused by external energy failure. In terms of lubrication mechanism, the self-lubricating system 100 realizes "synchronous lubrication", and the lubrication frequency is accurately matched with the operating status of the equipment, which not only ensures sufficient lubrication during high-intensity operations, but also avoids resource waste and environmental pollution when idle. During operation, the self-lubricating system 100 replaces manual oiling with full automation, reducing labor intensity while eliminating lubrication risks caused by human negligence. In addition, compared with the existing technology, the self-lubricating system 100 has only a small number of moving parts, which greatly reduces the number of failure points, reduces the difficulty of troubleshooting and repair, and effectively reduces the maintenance cost throughout the entire life cycle.

[0022] More importantly, the present invention innovatively introduces a buffer unit (first buffer component 31 and / or second buffer component 32) to establish a flexible connection between the oil supply unit 1 and the mining equipment 200 and / or between the pressure unit 6 and the mining equipment 200. This buffer unit can effectively absorb and dissipate the impact energy generated by the movement of the dynamic component 201, converting the sharp impact force into a gentle elastic force transmission, thereby greatly reducing the impact load on the interior of the oil supply 12 (such as the piston), avoiding premature damage due to impact fatigue, significantly improving the stability and reliability of the oil supply unit 1, and extending the service life of the entire self-lubricating system 100.

[0023] Next, combine Figure 2 and Figure 3 The buffer unit is described in detail. Figure 3 As shown, the first buffer component 31 includes a housing 311 that fits over the oil feeder 12 and connects the oil feeder 12 to the static component 202 or the dynamic component 201, and a shock-absorbing assembly 312 disposed between the housing 311 and the oil feeder 12. The shock-absorbing assembly 312 can be made of a highly elastic material such as rubber or silicone, or it can be composed of a set of springs. The housing 311 protects the oil feeder 12 within it. The shock-absorbing assembly 312 absorbs the vibration and impact of the pressure unit 6 on the oil feeder 1 when the pressure unit 6 collides with the oil feeder 1, effectively absorbing the impact energy and ensuring stable operation of the oil feeder 12.

[0024] Back to Figure 2, the second buffer component 32 includes a spring or a plate spring, etc. As an example, a plate spring is used as the second buffer component 32. One end of the plate spring is fixed to the static component 202 or the dynamic component 201, and the other end thereof is used as a free end for mounting the pressure structure 61. When the pressure unit 6 collides with the oil supply unit 1, the pressure unit 6 is subjected to a reaction force from the oil supply unit 1, and the plate spring will undergo elastic deformation, thereby absorbing the impact energy, thereby reducing the impact load on the inside of the oil supply 12 (such as the piston). As another example, a spring can also be used as the second buffer component 32, one end of which is constrained (for example, directly fixed or indirectly fixed) on the static component 202, and the other end is constrained (for example, directly fixed or indirectly fixed) on the pressure structure 61, thereby achieving a buffering effect.

[0025] In this embodiment, the above-mentioned pressure structure 61 is slidably arranged on the plate-type spring sheet. Figure 2 or Figure 4 As shown, a slide groove is formed on the plate spring. The pressure unit 6 also includes a connecting screw 63, whose first end is connected to the pressure structure 61 and whose second end passes through the slide groove and is slidably disposed on the plate spring. The pressure unit 6 also includes a connecting nut 62, which is threadedly connected to the second end of the connecting screw 63 and constrains the connecting screw 63 to the plate spring. The pressure unit 6 also includes an elastic gasket (such as a disc spring or a rubber washer) that is sleeved on the connecting screw 63 and located between the plate spring and the connecting nut 62.

[0026] In this embodiment, the pressure-applying structure 61 includes a calibration concave surface 611 and a pressure point 612 disposed on the calibration concave surface 611. The pressure-receiving structure 121 includes a pressure point. The oil supply device 12 includes a calibration protrusion 1221 surrounding the pressure point. When the dynamic component 201 moves toward the static component 202, the pressure-applying point 612 contacts the pressure-receiving structure 121, the oil supply piston 124 compresses the return spring 125 and the grease within the oil supply cavity 123, and the calibration protrusion 1221 simultaneously contacts the calibration concave surface 611 and causes the pressure-applying structure 61 to slide on the plate-type spring, thereby aligning the pressure-applying point 612 with the pressure point, ensuring precise alignment of the pressure-applying point 612 with the pressure point. Among them, the matching stroke of the correction protrusion 1221 and the correction concave surface 611 is equal to the stroke from the oil supply piston 124 to the lower dead center of the oil supply cavity 123. When the correction protrusion 1221 of the outer ring is rigidly matched with the correction concave surface 611, the extrusion work of the oil supply piston 124 in the oil supply cavity 123 is just completed and reaches the lower dead center, ensuring that the pressure applied to the oil supply device 12 is completely borne by the correction protrusion 1221 and the correction concave surface 611, and the oil supply piston 124 and the oil supply cavity 123 hidden inside are no longer subjected to external pressure. Among them, the pressure point 612 and the pressure point can be selected to be conical, prismatic or hemispherical. As a preferred example, the pressure point 612 and the pressure point are both hemispherical protrusions, which can reduce the friction loss generated when the two contact. The matching interface of the correction concave surface 611 and the correction protrusion 1221 can be selected to be an annular cone surface or an annular spherical surface with a correction function.

[0027] When there are multiple lubricating points 203 on the mining equipment 200 (e.g., two hinges between a carriage and a frame), the self-lubricating system 100 may further include a distributor 2. The oil outlet of the oil supply 12 is first connected to the distributor 2, which then delivers grease to each lubricating point 203 as needed, in equal or proportional amounts, through multiple branch oil pipes, achieving comprehensive lubrication of the key parts of the entire mining equipment 200.

[0028] Next, combine Figures 2 to 6 The specific structure of the oil feeder 12 is described. As an example, Figure 2 and Figure 3As shown, the oil supply device 12 includes a device body 122 having a correction protrusion 1221, an oil supply cavity 123 formed in the device body 122, an oil supply channel 126 provided in the device body 122 and having a one-way valve 1261, an oil supply piston 124 slidably disposed in the oil supply cavity 123 and connected to the pressure structure 121, and a return spring 125 sleeved on the oil supply piston 124 and located between the pressure structure 121 and the device body 122. The remaining space in the oil supply cavity 123 not occupied by the oil supply piston 124 is connected to the oil storage tank 11 and, via the oil supply channel 126, to the lubrication point 203. The one-way valve 1261 only allows grease to flow from the remaining space in the oil supply cavity 123 to the lubrication point 203.

[0029] During operation, when the dump truck's car body is lowered and forced to press against the pressure structure 121, this pressure directly drives the oil supply piston 124 to move within the oil supply chamber 123 and compress the remaining space in the oil supply chamber 123 and the return spring 125. The grease that has entered the oil supply chamber 123 in advance is squeezed by the oil supply piston 124, and the pressure increases, pushing open the one-way valve 1261, separating from the oil supply device 12 and flowing to the lubrication point 203. When the car body is lifted and the pressure structure 121 is no longer receiving pressure, the compressed return spring 125 quickly rebounds, pushing the oil supply piston 124 back to its initial position. That is, the retreat of the oil supply piston 124 causes the remaining space in the oil supply chamber 123 to expand, forming a negative pressure (vacuum). At this time, the one-way valve 1261 closes due to the reverse pressure, preventing the discharged grease from flowing back. The path connected to the oil storage tank 11 is attracted by negative pressure, so that the grease in the oil storage tank 11 is automatically sucked into the remaining space of the oil supply cavity 123, filling the cavity and preparing for the next pressurized oil supply.

[0030] To ensure the stability and durability of the oil supply piston 124 during long-term reciprocating motion and prevent damage due to overtravel, the oil supply device 12 also includes a limit assembly 127. This limit assembly 127 includes a limit groove 1271 provided on the oil supply piston 124 and a limit rod 1272 provided on the inner wall of the device body 122. The limit rod 1272 slides within the limit groove 1271, and the length of the limit groove 1271 accurately limits the movable travel of the oil supply piston 124.

[0031] As another example, Figure 4 、 Figure 5 and Figure 6 As shown, the oil feeder 12 includes a power part 128 and an oil feed part 129 arranged at intervals. Figure 4 and Figure 5The power part 128 includes a power part body 1281, a power cavity 1282 formed in the power part body 1281, a power piston 1283 slidably disposed in the power cavity 1282 and connected to the pressure structure 121, and a first return spring 1284 sleeved on the power cavity 1282 and located between the pressure structure 121 and the power part body 1281. The power cavity 1282 includes a remaining space not occupied by the power piston 1283. Figure 4 and Figure 6 The oil supply part 129 includes an oil supply part main body 1291, an oil supply cavity 1292 formed in the oil supply part main body 1291 and connected to the point to be lubricated 203, an oil supply channel 1295 provided in the oil supply part main body 1291 and having a one-way valve 12951, an oil supply piston 1293 which is slidable and completely arranged in the oil supply cavity 1292, and a second return spring 1294 provided in the oil supply cavity 1292 and abutting against the oil supply piston 1293. The oil supply cavity 1292 includes a driving end connected to the remaining space of the power cavity 1282, and an oil supply end connected to the oil storage tank 11 and connected to the point to be lubricated 203 through the oil supply channel 1295, so that the one-way valve 12951 only allows grease to flow from the oil supply end of the oil supply cavity 1292 to the point to be lubricated 203.

[0032] During operation, when the dump truck's body lowers and forces it against the pressure structure 121, this pressure drives the power piston 1283, compressing the remaining space in the power chamber 1282 and the first return spring 1284. This causes the transmission fluid previously stored in the remaining space in the power chamber 1282 to become pressurized, forcing more of it to flow into the drive end of the oil supply chamber 1292. The pressure of the transmission fluid acts on the oil supply piston 1293, forcing it to move from the drive end toward the oil supply end of the oil supply chamber 1292, overcoming the elastic force of the second return spring 1294. This movement of the oil supply piston 1293 compresses the space at the oil supply end of the oil supply chamber 1292, squeezing the grease previously stored there. This pressure increases, pushing open the one-way valve 12951, allowing the grease to escape from the oil supply device 12 and flow to the lubrication point 203. When the car body is lifted and the pressure-bearing structure 121 is decompressed, the compressed first return spring 1284 resets the power piston 1283. This movement within the power chamber 1282 expands the remaining space within the oil supply chamber 1292, allowing transmission fluid to be recovered from the remaining space. Simultaneously, the compressed second return spring 1294 drives the oil supply piston 1293 in the opposite direction (from the supply end of the oil supply chamber 1292 toward the drive end). This expands the space at the supply end of the oil supply chamber 1292, generating negative pressure. At this point, the check valve 12951 closes due to the reverse pressure, preventing the backflow of the discharged grease. The negative pressure in the path connecting to the oil reservoir 11 automatically draws the grease from the reservoir 11 into the space at the supply end of the oil supply chamber 1292, filling the cavity and preparing for the next round of pressurized oil supply.

[0033] Similarly, to ensure the stability and durability of the power piston 1283 during long-term reciprocating motion and prevent damage due to overtravel, the oil supply unit 12 also includes a limiter assembly 1286. This limiter assembly 1286 comprises a limiter slot on the power piston 1283 and a limiter rod on the power section body 1281. The limiter rod slides within the limiter slot, and the length of the limiter slot precisely limits the travel of the power piston 1283.

[0034] In summary, the self-lubricating system 100 can provide synchronous lubrication for industrial and mining equipment, and can effectively buffer shocks and absorb vibrations, thereby improving the operational reliability and durability of the self-lubricating system.

[0035] In the above description of this application, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood in a broad sense. For example, with respect to the term "connected," it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. Therefore, unless otherwise expressly specified in this application, those skilled in the art can understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "lower" and other terms indicating orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0037] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0038] Although a number of embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may devise numerous modifications, variations, and alternatives without departing from the concept and spirit of the present invention. It should be understood that in practicing the present invention, various alternatives to the embodiments of the present invention described herein may be employed. The appended claims are intended to define the scope of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A self-lubricating system for industrial and mining equipment, wherein the industrial and mining equipment includes agricultural machinery, mining equipment, wind power generation, engineering vehicles, or mining equipment, wherein the agricultural machinery, mining equipment, wind power generation, engineering vehicles, or mining equipment includes a static component, a dynamic component, and a point to be lubricated, wherein the dynamic component is configured to reciprocate relative to the static component, and wherein: The self-lubricating system comprises: A buffer unit, comprising a first buffer component and / or a second buffer component; an oil supply unit, which can be mounted on one of the static component and the dynamic component directly or through the first buffer component, the oil supply unit comprising an oil storage tank for storing grease and an oil supplier connected to the oil storage tank and the lubricated point, wherein the oil supplier comprises a pressure-bearing structure; a pressure applying unit including a pressure applying structure that can be mounted on the other of the static component and the dynamic component directly or through the second buffer component; The pressure-bearing structure is configured to repeatedly receive the pressure of the pressure-applying structure when the dynamic component reciprocates relative to the static component, and repeatedly trigger the oil supply device to supply the grease in the oil storage tank to the lubrication point.

2. The self-lubricating system according to claim 1, characterized in that: The second buffer component includes a spring or a plate-type spring, wherein one end of the spring is constrained to the static component or the dynamic component, and the other end is constrained to the pressure structure; one end of the plate-type spring is fixed to the static component or the dynamic component, and the other end is used to install the pressure structure.

3. The self-lubricating system according to claim 1, characterized in that: The first buffer component includes a shell which is sleeved outside the oil feeder and connects the oil feeder to the static component or the dynamic component, and a shock absorbing assembly which is arranged between the shell and the oil feeder.

4. The self-lubricating system according to claim 2, characterized in that: The pressure-applying structure is slidably disposed on the plate-type spring sheet, the pressure-applying structure includes a correction concave surface and a pressure point disposed on the correction concave surface, the pressure-receiving structure includes a pressure point, and the oil supplier includes a correction protrusion surrounding the pressure point. When the dynamic component moves close to the static component, the correction protrusion contacts the correction concave surface and prompts the pressure-applying structure to slide on the plate-type spring sheet to align the pressure-applying point with the pressure-receiving point.

5. The self-lubricating system according to claim 4, characterized in that: The pressure-applying point and the pressure-receiving point are both hemispherical protrusions.

6. The self-lubricating system according to claim 4, characterized in that: A sliding groove is formed on the plate-type spring piece, and the pressure-applying unit further includes: a connecting screw, a first end of which is connected to the pressure structure, and a second end of which passes through the slide slot and is slidably disposed on the plate-type spring; a connecting nut, which is threadedly connected to the second end of the connecting screw and constrains the connecting screw to the plate-type spring sheet; An elastic gasket is sleeved on the connecting screw and located between the plate-type spring piece and the connecting nut.

7. The self-lubricating system according to claim 1, characterized in that: The oil feeder includes a device body, an oil supply cavity formed in the device body, an oil supply passage provided in the device body and having a one-way valve, an oil supply piston slidably disposed in the oil supply cavity and connected to the pressure-bearing structure, and a return spring sleeved on the oil supply piston and located between the pressure-bearing structure and the device body, wherein the remaining space of the oil supply cavity not occupied by the oil supply piston is connected to the oil storage tank and is connected to the lubricated point through the oil supply passage, so that the one-way valve only allows the grease to flow from the remaining space of the oil supply cavity to the lubricated point; When the pressure-bearing structure receives pressure, the pressure-bearing structure can drive the oil supply piston to move in the oil supply cavity and compress the remaining space of the oil supply cavity and the return spring, so as to force the grease that has entered the remaining space of the oil supply cavity in advance to leave the oil supply and flow to the point to be lubricated; When the pressure-bearing structure receives no pressure, the compressed return spring will drive the oil supply piston to move in the oil supply cavity and expand the remaining space of the oil supply cavity, so that the grease in the oil storage tank can enter the remaining space of the oil supply cavity by relying on negative pressure with the assistance of the one-way valve.

8. The self-lubricating system according to claim 1, characterized in that: The oil feeder comprises a power part and an oil feed part which are arranged at intervals; The power part includes a power part body, a power cavity formed in the power part body, a power piston slidably disposed in the power cavity and connected to the pressure structure, and a first return spring sleeved on the power cavity and located between the pressure structure and the device body, wherein the power cavity includes a remaining space not occupied by the power piston; The oil supply portion includes an oil supply portion body, an oil supply cavity formed in the oil supply portion body and connected to the point to be lubricated, an oil supply passage provided in the oil supply portion body and having a one-way valve, an oil supply piston slidably and completely disposed in the oil supply cavity, and a second return spring provided in the oil supply cavity and abutting against the oil supply piston, the oil supply cavity including a driving end connected to the remaining space of the power cavity, and an oil supply end connected to the oil storage tank and connected to the point to be lubricated through the oil supply passage, so that the one-way valve only allows the grease to flow from the oil supply end of the oil supply cavity to the point to be lubricated; When the pressure-bearing structure receives pressure, the pressure-bearing structure can drive the power piston to move in the power cavity and compress the remaining space of the power cavity and the first return spring, so as to force the transmission fluid stored in the remaining space of the power cavity in advance to flow more into the oil supply cavity, so that the oil supply piston moves from the driving end of the oil supply cavity to the oil supply end thereof under the action of the transmission fluid and compresses the second return spring, thereby driving the grease that has entered the driving end of the oil supply cavity in advance away from the oil supply portion and flows to the point to be lubricated; When the pressure-bearing structure receives no pressure, the compressed first return spring will drive the power piston to move in the power chamber and expand the remaining space of the oil supply chamber so as to recover the transmission fluid from the remaining space of the oil supply chamber, and the compressed second return spring will drive the oil supply piston to move from the oil supply end of the oil supply chamber to its driving end, so that the grease in the oil storage tank can enter the driving end of the oil supply chamber by relying on negative pressure with the assistance of the one-way valve.

9. The self-lubricating system according to claim 1, characterized in that: The oil feeder further comprises a limiting assembly for limiting the movable stroke of the oil feed piston or the power piston and at least consisting of the limiting groove and the limiting rod.

10. The self-lubricating system according to claim 1, characterized in that: There are multiple points to be lubricated, and the self-lubricating system further includes a distributor for connecting multiple points to be lubricated with one oil supplier.

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