A linear bearing lubrication structure

Abstract

The invention discloses a linear bearing lubrication structure, and relates to the technical field of bearing assemblies. A linear bearing lubrication structure comprises a retaining frame, the outer sleeve of the retaining frame is provided with a fixing seat, a seal is installed at both ends of the retaining frame, an oil storage box is provided in the annular part around the retaining frame, an oil storage cavity is opened inside the oil storage box, and also comprises: an oil groove, which is provided on the inner wall at the bottom of the oil storage box; the invention provides an oil groove and a ball inside the oil storage box, and the oil groove can play a guiding and buffering role when the lubricating oil flows, so that the oil film is formed more evenly and stably at the bending part, and the oil film rupture or instability caused by the turbulent flow of the oil is reduced, so as to better achieve lubrication, and at the same time, the ball bearings distributed at equal intervals can evenly disperse the load borne by the bearing, avoid excessive local pressure, and enhance the overall bearing capacity of the bearing, so that it can adapt to higher loads and worse working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing components, and in particular relates to a linear bearing lubrication structure. Background Art

[0002] Linear bearings are widely used in the field of mechanical transmission, such as sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, printing machinery, etc. It can realize the movement of the shaft through the engagement of the ball and the shaft, making the movement of the housing relative to the shaft smoother and more efficient. Since the load-bearing ball is in point contact with the bearing outer shell, the steel ball rolls with minimal friction resistance. Therefore, linear bearings have the advantages of low friction, high stability, and can obtain smooth linear motion with high sensitivity and high precision without changing with the bearing speed.

[0003] However, although a lubrication structure is provided in the linear bearing in the prior art to increase the service life of the bearing, it has a certain self-limitation. For example, drip lubrication requires manual and frequent regular inspection and addition of lubricating oil, while the circulation system formed by jet lubrication has a relatively complex lubrication system and a high manufacturing cost. Most lubrication structures are unstable during use, such as the oil film formed by lubricating oil delivery, which leads to increased wear and affects the processing accuracy of the equipment. For this reason, we propose a linear bearing lubrication structure to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a linear bearing lubrication structure that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a linear bearing lubrication structure, including a retaining frame, an outer sleeve of the retaining frame is provided with a fixed seat, a seal is installed at both ends of the retaining frame, an annular part around the retaining frame is provided with an oil storage box, and an oil storage cavity is opened inside the oil storage box, and also includes: an oil groove, which is arranged on the inner wall of the bottom of the oil storage box; an oil outlet is arranged on the inner wall of the bottom of the oil storage box at the bending part of the oil groove, and balls are installed in the oil outlet, and a plurality of the balls are symmetrically distributed; an impact block, which is arranged in the oil storage cavity; a movable sealing block, which is attached to the top surface of the oil groove, and is used to intermittently inject lubricating oil into the oil groove; an air bag, which is arranged in the oil storage box, and when the impact block shakes in the oil storage cavity, it collides with the air bag to accelerate the dissipation of heat generated by the friction between the seal and the linear guide.

[0006] Preferably, the seal comprises a first sealing ring fixed at both ends of the retaining frame, a second sealing ring is fixedly mounted on one side of the first sealing ring, wherein the first sealing ring and the second sealing ring are filled with curing grease, and a cavity structure is arranged inside the first sealing ring.

[0007] Preferably, an oil filling port is installed at one end of the oil storage box, a sealing cover is provided on the oil filling port, the oil groove is arranged in an S shape, and an oil inlet is opened on the top surface of the oil groove.

[0008] Preferably, a first limit block is fixedly connected to the top of the impact block, the first limit block is sleeved on a limit rod, and both ends of the limit rod are fixedly connected to the inner wall of the oil storage box.

[0009] Preferably, a fixed block is provided on one side of the sealing block, the end of the fixed block is fixedly connected to the inner wall of the oil storage box, the interior of the fixed block is slidably connected with a sliding rod, one end of the sliding rod is fixedly connected to a contact block, the surface of the sliding rod is fixedly connected to a limiting plate, a tension spring is fixedly connected between the limiting plate and the fixed block, and the tension spring is sleeved on the surface of the sliding rod.

[0010] Preferably, a connecting rod is fixedly connected to the surface of the sliding rod, an end of the connecting rod is fixedly connected to a sealing block, a bottom surface of the sealing block fits with a top surface of the oil groove, and a diameter of the sealing block is larger than a diameter of the oil inlet.

[0011] Preferably, an airbag is fixedly connected to the surface of the limit rod, an air guide tube is fixedly connected to the top of the air bag, the end of the air guide tube passes through the inner wall of the oil storage box and is fixedly connected to an air guide head, the air guide head is arranged in a chamber, the chamber is opened inside the first sealing ring, an opening is opened on one side of the first sealing ring, and the opening is arranged at an inclined angle.

[0012] Preferably, one end of the airbag is fixedly connected to an air intake pipe, and the end of the air intake pipe passes through a fixing seat.

[0013] Preferably, mounting grooves are provided on all four sides of the fixing seat, the air inlet pipe is located in the mounting grooves, and mounting holes are provided on the surface of the fixing seat.

[0014] Preferably, side rings are clamped at both ends of the fixing seat, and a second limiting block distributed in an annular shape is fixed to one side surface of the sealing member, and the second limiting block is in close contact with the side surface of the side ring.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] 1. This linear bearing lubrication structure has an oil groove and balls arranged inside the oil storage box. The oil groove can guide and buffer the flow of lubricating oil, so that the oil film is formed more evenly and stably at the curved part, reducing the rupture or instability of the oil film caused by the turbulent flow of the oil, thereby achieving better lubrication. At the same time, the balls distributed at equal intervals can evenly disperse the load borne by the bearing, avoid excessive local pressure, enhance the overall bearing capacity of the bearing, and enable it to adapt to higher loads and worse working conditions;

[0017] 2. This linear bearing lubrication structure, through the provided impact block, causes the lubricating oil inside the oil storage box to shake when the bearing moves, thereby driving the impact block to shake left and right. During the shaking, a part of the force can be applied to separate the sealing block from the oil inlet, releasing the sealing state, so that the lubricating oil can be intermittently injected into the oil tank, effectively saving the cost of lubricating oil use, and also avoiding the occurrence of leakage and pollution caused by excessive injection of lubricating oil.

[0018] 3. This linear bearing lubrication structure can hit the airbag when the impact block shakes in the lubricating oil, which can accelerate the air flow inside the airbag. One end of the air guide head is connected and extends into the first sealing ring, thereby improving the heat dissipation effect at the first sealing ring, thereby extending the service life of the seals at both ends of the retaining frame and reducing the occurrence of seal deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached picture:

[0020] Figure 1 This is a schematic diagram of the overall structure of a linear bearing lubrication structure proposed by the present invention;

[0021] Figure 2 A side perspective structural diagram of a linear bearing lubrication structure proposed by the present invention;

[0022] Figure 3 A side cross-sectional structural schematic diagram of a linear bearing lubrication structure proposed by the present invention;

[0023] Figure 4 The present invention proposes Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0024] Figure 5 The present invention proposes Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0025] Figure 6 A schematic diagram of a top cross-sectional structure of a linear bearing lubrication structure proposed by the present invention;

[0026] Figure 7This is a schematic diagram of a partial three-dimensional structure of a sealing block in a linear bearing lubrication structure proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of a side sectional structure of an oil storage box in a linear bearing lubrication structure proposed by the present invention;

[0028] Fig. 9 This is another partial cross-sectional three-dimensional structural schematic diagram of an oil storage box in a linear bearing lubrication structure proposed by the present invention.

[0029] In the figure: 1. retaining frame; 11. side ring; 2. fixing seat; 21. mounting hole; 22. mounting groove; 3. sealing member; 31. first sealing ring; 32. second sealing ring; 4. oil storage box; 41. oil filling port; 42. oil storage chamber; 43. oil tank; 44. oil outlet; 45. ball bearing; 46. oil inlet; 5. impact block; 51. first limit block; 52. limit rod; 53. contact block; 54. fixing block; 55. sliding rod; 56. limit plate; 57. tension spring; 58. connecting rod; 59. sealing block; 61. air bag; 62. air guide pipe; 63. air guide head; 64. chamber; 65. opening; 66. air intake pipe; 7. second limit block. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0032] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Example 1: Reference Figure 1-Figure 9, a linear bearing lubrication structure, including a retaining frame 1, an outer sleeve of the retaining frame 1 is provided with a fixing seat 2, a sealing member 3 is installed at both ends of the retaining frame 1, an annular portion around the retaining frame 1 is provided with an oil storage box 4, an oil storage chamber 42 is opened inside the oil storage box 4, and also includes: an oil groove 43, arranged on the inner wall at the bottom of the oil storage box 4; the bending part of the oil groove 43 is located at the bottom inner wall of the oil storage box 4 and is provided with an oil outlet 44, and a ball 45 is installed in the oil outlet 44, and a plurality of balls 45 are symmetrically distributed; an impact block 5, arranged in the oil storage chamber 42; a movable sealing block 59, which is attached to the top surface of the oil groove 43, is used to intermittently inject lubricating oil into the oil groove 43; an air bag 61, which is arranged in the oil storage box 4, and when the impact block 5 shakes in the oil storage chamber 42, it collides with the air bag 61 to accelerate the heat dissipation generated by the friction between the seal 3 and the linear guide rail.

[0034] During installation of the present invention, the retaining frame 1 can be inserted into the fixing seat 2. After fixed installation, the retaining frame 1 is sleeved on the moving rod on the processing equipment, and the ball 45 on the inner wall of the retaining frame 1 forms point contact with the surface of the moving rod, thereby effectively reducing friction. The parts that need to be moved are installed on the fixing seat 2, which is convenient for driving the processed parts to move to a suitable position. Before use, the lubricating oil can be pre-injected into the oil storage box 4. It should be noted that the lubricating oil is injected into the oil storage box 4 in an unfilled state, wherein an oil groove 43 is provided in the oil storage box 4, and a ball 45 is installed at the oil groove 43. The oil groove 43 can play a guiding and buffering role when the lubricating oil flows, so that the oil film is formed more evenly and stably at the bending part, reducing the rupture or instability of the oil film caused by the turbulent oil flow, thereby better realizing lubrication. At the same time, the ball 45 distributed at equal intervals can evenly disperse the load borne by the bearing, avoid excessive local pressure, and enhance the bearing. The overall load-bearing capacity enables it to adapt to higher loads and worse working conditions. As the equipment starts to process the workpiece, the retaining frame 1 slides back and forth on the moving rod, so that the lubricating oil in the oil storage box 4 shakes, and the shaking of the lubricating oil can drive the impact block 5 immersed in the lubricating oil to shake. When the impact block 5 shakes, it exerts a part of the force to hit the contact block 53, thereby separating the sealing block 59 from the oil inlet 46 and releasing the sealing state, so that the lubricating oil is intermittently injected into the oil tank 43, effectively saving the cost of lubricating oil, and also avoiding the leakage and pollution caused by excessive injection of lubricating oil. When the impact block 5 shakes in the lubricating oil, it can hit the airbag 61, which can accelerate the air flow inside the airbag 61, and one end is connected to the inside of the first sealing ring 31, thereby accelerating the heat dissipation effect at the first sealing ring 31, thereby extending the service life of the seals 3 at both ends of the retaining frame 1 and reducing the deformation of the seals 3.

[0035] Example 2: Reference Figure 3 and Figure 4, which is basically the same as Example 1, and further, the sealing member 3 includes a first sealing ring 31 fixed at both ends of the retaining frame 1, and a second sealing ring 32 is fixedly installed on one side of the first sealing ring 31, wherein the space between the first sealing ring 31 and the second sealing ring 32 is filled with curing grease, and a cavity structure is arranged inside the first sealing ring 31.

[0036] The above scheme is adopted, in which the structural setting of the first sealing ring 31 and the second sealing ring 32 can form a double-layer sealing effect at both ends of the retaining frame 1, with better sealing performance, avoiding leakage of lubricating oil and pollution of the working environment. The first sealing ring 31 and the second sealing ring 32 are filled with solidified grease to form an additional sealing barrier, which effectively fills tiny gaps and unevenness and prevents external liquids, dust and other impurities from entering the relatively sealed space, thereby significantly improving the overall sealing effect. Some sealing ring materials may adhere after long-term contact or in specific environments. Filling with solidified grease can form an isolation layer between the two layers of sealing rings, effectively preventing mutual adhesion between the sealing rings, ensuring that when the sealing structure needs to be separated or adjusted, the sealing ring can remain independent and complete, which is convenient for operation and maintenance.

[0037] Example 3: Reference Figure 8 and Fig. 9 , which is basically the same as Example 2, and furthermore: an oil filling port 41 is installed at one end of the oil storage box 4, a sealing cover is provided on the oil filling port 41, the oil groove 43 is arranged in an S shape, and an oil inlet 46 is opened on the top surface of the oil groove 43.

[0038] Before use or during maintenance, the oil filling port 41 is opened by rotating the sealing cover, and the lubricating oil can be injected into the interior of the oil storage box 4 through the oil filling port 41. It should be noted that the oil filling port 41 is located on the side of the oil storage box 4 near the bottom inner wall, which is convenient for the subsequent replacement of the lubricating oil. The oil groove 43 is arranged in an S shape, and the ball 45 is arranged directly below the oil inlet 46. When the lubricating oil enters the oil groove 43 from the oil inlet 46, it can directly contact and lubricate with the ball 45 to improve the lubrication effect. At the same time, when the oil storage box 4 reciprocates, it drives the excess lubricating oil in the oil groove 43 to shake. Through the design of the S-shaped structure, the flow rate of the lubricating oil in the oil groove 43 can be reduced, which has a certain flow blocking effect, thereby effectively improving the stability of the lubricating oil film formation and preventing excessive lubricating oil from contacting the ball 45.

[0039] Example 4: Reference Figure 4 , Figure 7 and Figure 8, which is basically the same as Example 3, and further, a first limit block 51 is fixedly connected to the top of the impact block 5, and the first limit block 51 is sleeved on the limit rod 52, and the two ends of the limit rod 52 are fixedly connected to the inner wall of the oil storage box 4, and a fixed block 54 is provided on one side of the sealing block 59, and the end of the fixed block 54 is fixedly connected to the inner wall of the oil storage box 4, and a sliding rod 55 is slidably connected inside the fixed block 54, and one end of the sliding rod 55 is fixedly connected to the contact block 53, and the surface of the sliding rod 55 is fixedly connected to the limit plate 56, and a tension spring 57 is fixedly connected between the limit plate 56 and the fixed block 54, and the tension spring 57 is sleeved on the surface of the sliding rod 55, and the surface of the sliding rod 55 is fixedly connected to the connecting rod 58, and the end of the connecting rod 58 is fixedly connected to the sealing block 59, and the bottom surface of the sealing block 59 is in contact with the top surface of the oil groove 43, and the diameter of the sealing block 59 is larger than the diameter of the oil inlet 46.

[0040] With the above scheme, when the impact block 5 is in the lubricating oil in the oil storage box 4, the impact block 5 is driven to shake left and right as the lubricating oil shakes, and when the impact block 5 shakes, it hits the contact block 53 on one side, so that the sliding rod 55 at one end of the contact block 53 moves synchronously, and with the elastic rebound of the tension spring 57, the sealing block 59 is separated from the oil inlet 46, so that the lubricating oil is intermittently injected into the oil tank 43, effectively saving the use cost of the lubricating oil, and also avoiding the leakage and pollution caused by excessive injection of lubricating oil. The provision of the first limit block 51 is convenient for limiting the movement of the impact block 5, and the first limit block 51 is sleeved on the limit rod 52 There is a large gap between the surface of the limit rod 52 and the surface of the limit rod 52. In this way, since the oil storage box 4 is distributed in a ring shape on the surrounding surfaces of the retaining frame 1, the internal structure of the oil storage box 4 installed on the bottom surface of the retaining frame 1 is inverted. Due to the limitation of the first limit block 51, the impact block 5 is prevented from running around with the shaking of the lubricating oil, affecting the normal operation of the structure. Through the limitation of the first limit block 51, although the impact block 5 in the oil storage box 4 in the inverted state is immersed in the lubricating oil, it will still shake with the shaking of the lubricating oil. The bottom surface of the sealing block 59 is provided with a sealing rubber ring, which can seal and limit the oil inlet 46 in the initial state.

[0041] It should be noted that the elastic force of the tension spring 57 is smaller than the impact force of the impact block 5. During actual operation of the structure, the lubricating oil may have a smaller shaking force. Therefore, when the impact block 5 hits the contact block 53, the sealing block 59 is not separated from the oil inlet 46, and the lubricating oil cannot enter the interior of the oil groove 43. However, part of the lubricating oil that has previously entered the oil groove 43 still remains in the oil groove 43, and this part of the lubricating oil can be used to lubricate the ball 45. In actual working conditions, the more intense the reciprocating sliding of the linear bearing is, the more lubrication effect the ball 45 at the contact part needs to provide. If the reciprocating sliding is not intense, no more lubrication is required, so it will not affect the overall lubrication effect of the ball 45 in motion.

[0042] Example 5: Reference Figure 4 , Figure 5 , which is basically the same as Example 4, and further, an air bag 61 is fixedly connected to the surface of the limiting rod 52, an air guide pipe 62 is fixedly connected to the top of the air bag 61, an end of the air guide pipe 62 passes through the inner wall of the oil storage box 4 and is fixedly connected to an air guide head 63, the air guide head 63 is arranged in a chamber 64, the chamber 64 is opened inside the first sealing ring 31, an opening 65 is opened on one side of the first sealing ring 31, and the opening 65 is arranged at an inclined angle, one end of the air bag 61 is fixedly connected to an air intake pipe 66, an end of the air intake pipe 66 passes through the fixed seat 2, the surrounding surfaces of the fixed seat 2 are all provided with mounting grooves 22, the air intake pipe 66 is located in the mounting groove 22, and the surface of the fixed seat 2 is provided with a mounting hole 21.

[0043] With the above scheme, when the impact block 5 is immersed in the lubricating oil in the oil storage box 4, the impact block 5 is driven to shake with the shaking of the lubricating oil. When the impact block 5 shakes, one end will contact and collide with the airbag 61, squeezing the air inside the airbag 61, thereby disturbing the air flow inside the airbag 61. Due to the setting of the air guide tube 62, the air guide head 63 at the end of the air guide tube 62 extends into the interior of the chamber 64, and then with the disturbance of the air, the heat dissipation inside the chamber 64 is accelerated. Since the airbag 61 is set in the oil storage box 4, and It is fixedly mounted on the limit rod 52. When the oil storage box 4 is filled with lubricating oil in a less than full state, a part of the airbag 61 is immersed in the lubricating oil. During operation, due to the shaking of the lubricating oil, the liquid itself can exert a part of the force on the outside of the airbag 61, thereby providing more air flow disturbance effects, thereby improving the cooling and heat dissipation effect on the first sealing ring 31 at the sealing member 3, extending the service life of the sealing member 3, and reducing the occurrence of deformation. A one-way valve is provided at the connection between the air inlet pipe 66 and the airbag 61 to facilitate the air intake of the airbag 61. Figure 4 As shown in , a support plate is installed on the surface of the limiting rod 52, and the support plate is in contact with one side of the airbag 61 to provide support force when the airbag 61 is hit.

[0044] It should be understood that the weight of the impact block 5 is greater than the buoyancy of the lubricating oil injected into the oil storage box 4, which provides a better force when the impact block 5 shakes and collides. The opening 65 is set at an oblique angle. When the lubricating oil shakes violently, the impact block 5 hits the airbag 61 to generate a strong airflow that blows into the chamber 64 and then sprays out through the opening 65. The opening 65 points to the surface of the moving rod in contact with the linear bearing, accelerating the air flow around the moving rod, which has the effect of assisting in cooling the moving rod components to a certain extent.

[0045] The fixed seat 2 is provided with mounting grooves 22 on all four sides of the surface, the air intake pipe 66 is located in the mounting grooves 22, the fixed seat 2 is provided with mounting holes 21 on the surface, side rings 11 are clamped at both ends of the fixed seat 2, and a second limiting block 7 distributed in a ring shape is fixed to one side of the sealing member 3, and the second limiting block 7 is in close contact with the side of the side ring 11.

[0046] The setting of the mounting groove 22 makes it convenient to install the air intake pipe 66 on the mounting frame 1 and connect it with one end of the airbag 61 after the mounting frame 1 is installed in the fixing seat 2. The side ring 11 is convenient for limiting the two ends of the mounting frame 1 after installation to prevent displacement in the fixing seat 2, thereby improving the stability of the structure. The second limiting block 7 is in contact with the side ring 11, so that a certain gap exists between one side of the seal 3 and the side ring 11, thereby facilitating the dissipation of heat.

[0047] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A linear bearing lubrication structure, comprising a cage, a fixed seat is provided on the outer sleeve of the cage, seals are installed at both ends of the cage, an oil storage box is provided on the annular portion around the cage, and an oil storage cavity is provided inside the oil storage box, characterized in that: Also includes: An oil tank is arranged on the inner wall of the bottom of the oil storage box; The oil tank is bent at the bottom inner wall of the oil storage box and is provided with an oil outlet. Balls are installed in the oil outlet, and multiple balls are symmetrically distributed. An impact block is arranged in the oil storage cavity; A movable sealing block is attached to the top surface of the oil tank to intermittently inject lubricating oil into the oil tank; The airbag is arranged in the oil storage box. When the impact block shakes in the oil storage cavity, it collides with the airbag to accelerate the heat dissipation generated by the friction between the seal and the linear guide rail; An oil filling port is installed at one end of the oil storage box, a sealing cover is arranged on the oil filling port, the oil tank is arranged in an S shape, and an oil inlet is opened on the top surface of the oil tank; A fixed block is provided on one side of the sealing block, the end of the fixed block is fixedly connected to the inner wall of the oil storage box, a sliding rod is slidably connected inside the fixed block, one end of the sliding rod is fixedly connected to a contact block, a limit plate is fixedly connected to the surface of the sliding rod, a tension spring is fixedly connected between the limit plate and the fixed block, and the tension spring is sleeved on the surface of the sliding rod; The surface of the sliding rod is fixedly connected with a connecting rod, the end of the connecting rod is fixedly connected with a sealing block, the bottom surface of the sealing block fits with the top surface of the oil groove, and the diameter of the sealing block is larger than the diameter of the oil inlet.

2. A linear bearing lubrication structure according to claim 1, characterized in that: The seal comprises a first sealing ring fixed at both ends of the retaining frame, a second sealing ring is fixedly mounted on one side of the first sealing ring, wherein curing grease is filled between the first sealing ring and the second sealing ring, and a cavity structure is arranged inside the first sealing ring.

3. A linear bearing lubrication structure according to claim 2, characterized in that: The top of the impact block is fixedly connected with a first limit block, the first limit block is sleeved on the limit rod, and the two ends of the limit rod are fixedly connected with the inner wall of the oil storage box.

4. A linear bearing lubrication structure according to claim 3, characterized in that: An airbag is fixedly connected to the surface of the limiting rod, an air guide tube is fixedly connected to the top of the airbag, an end of the air guide tube passes through the inner wall of the oil storage box and is fixedly connected to an air guide head, the air guide head is arranged in a chamber, the chamber is opened inside the first sealing ring, an opening is opened on one side of the first sealing ring, and the opening is arranged at an inclined angle.

5. A linear bearing lubrication structure according to claim 4, characterized in that: One end of the air bag is fixedly connected with an air intake pipe, and the end of the air intake pipe passes through the fixing seat.

6. A linear bearing lubrication structure according to claim 5, characterized in that: The surrounding surfaces of the fixing seat are all provided with mounting grooves, the air inlet pipe is located in the mounting grooves, and the surface of the fixing seat is provided with mounting holes.

7. A linear bearing lubrication structure according to claim 1, characterized in that: Side rings are clamped at both ends of the fixing seat, and a second limiting block distributed in an annular shape is fixed to one side surface of the sealing member, and the second limiting block is in close contact with the side surface of the side ring.

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