Self-lubricating structure of chain wheel shaft sleeve of gear box of coal mining machine

Abstract

The utility model relates to the field of chain wheel shaft sleeve self-lubrication, in particular to a coal mining machine gearbox chain wheel shaft sleeve self-lubrication structure which comprises a box body, a chain wheel is arranged in the box body, a rotating shaft is arranged on the inner wall of the chain wheel, a shaft sleeve is arranged between the rotating shaft and the chain wheel, a groove is formed in the end of the shaft sleeve, a liquid inlet hole is formed in the groove, and a spraying assembly is arranged below the shaft sleeve. The shaft sleeve is driven by the rotating shaft to rotate, the top of the sliding rod is attached to the end of the shaft sleeve, and when a concave arc groove formed in the end of the shaft sleeve rotates to be attached to the sliding rod, the sliding rod slides upwards under the acting force of a second elastic piece; and lubricating oil in the liquid conveying pipe is pressed by the sealing pressing plate, so that the lubricating oil flows to the end opening of the high-pressure spray head and is instantly sprayed out, the lubricating oil is intermittently sprayed to the shaft sleeve while the shaft sleeve and the rotating shaft are automatically lubricated, and the utilization rate and efficiency of the lubricating oil are improved.

Description

Technical Field

[0001] The utility model relates to the field of self-lubrication of a sprocket shaft sleeve, more specifically to a self-lubrication structure of a sprocket shaft sleeve of a coal mining machine gear box. Background Art

[0002] Coal mining machine is an important equipment in coal mining production, and its performance directly affects the production efficiency and safety of coal mining. In coal mining machine, gearbox is a key component, and the lubrication condition of gearbox sprocket sleeve as an important component of gearbox is directly related to the operation efficiency and life of gearbox. Traditional coal mining machine gearbox sprocket sleeve lubrication usually adopts external lubrication, and lubrication condition of sleeve is maintained by regular filling of lubricating oil or grease. However, due to the particularity of coal mining machine operation environment, external lubrication has some shortcomings. For example, during the lubrication process, the gearbox needs to be manually disassembled, and the equipment to be operated needs to be shut down for manual lubrication, which affects the operation efficiency.

[0003] In view of this, the utility model provides a self-lubricating structure of a sprocket shaft sleeve of a gear box of a coal mining machine. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and provide a self-lubricating structure of a sprocket sleeve of a gear box of a coal mining machine.

[0005] Therefore, the utility model provides a self-lubricating structure of a sprocket sleeve of a gear box of a coal mining machine, comprising a box body, a sprocket is arranged inside the box body, a rotating shaft is arranged on the inner wall of the sprocket, a sleeve is arranged between the rotating shaft and the sprocket, a groove is arranged at the end of the sleeve, a liquid inlet hole is arranged in a row, a concave arc groove is arranged at the end of the sleeve, and a spray assembly is arranged below the sleeve;

[0006] A lubricating liquid tank is arranged inside the box body, and a liquid supply assembly is arranged inside the lubricating liquid tank. The liquid supply assembly squeezes the internal lubricating liquid so that the lubricating liquid is automatically sprayed to the liquid inlet hole intermittently through the spray assembly to lubricate the shaft sleeve and the rotating shaft.

[0007] As a further improvement of the present technical solution, the liquid supply assembly includes a sealing pressure plate arranged inside the liquid inlet hole, and the sealing pressure plate moves inside the lubricating liquid tank. A first elastic member is provided between the sealing pressure plate and the lubricating liquid tank, and the sealing pressure plate is squeezed and fitted to slide on the inner wall of the lubricating liquid tank through the first elastic member.

[0008] As a further improvement of the technical solution, a rubber pad is provided on the side wall of the sealing pressure plate, and the rubber pad seals the gap between the sealing pressure plate and the lubricating liquid tank during the downward movement of the sealing pressure plate.

[0009] As a further improvement of the present technical solution, the injection assembly includes an infusion tube arranged below the sleeve, the end of the infusion tube passes through the side wall of the lubricating liquid tank, the inner wall of the infusion tube is slidably connected with a sliding rod, the side wall of the infusion tube is provided with a high-pressure nozzle, and the high-pressure nozzle is located above the bottom of the sliding rod.

[0010] As a further improvement of the present technical solution, a second elastic member is provided between the slide rod and the infusion tube, and the slide rod is fitted to the bottom of the sleeve end by the force of the second elastic member. When the concave arc groove at the end of the sleeve rotates to the slide rod, the slide rod is moved upward by the force of the second elastic member, so that the connection port between the high-pressure nozzle and the infusion tube is in an open state, and the lubricating oil in the infusion tube is sprayed to the liquid inlet hole through the high-pressure nozzle under pressure.

[0011] As a further improvement of the technical solution, the injection port of the infusion tube forms an angle of 15° with the bottom of the sleeve, thereby increasing the contact area between the lubricating liquid sprayed from the injection port of the infusion tube and the liquid inlet hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the self-lubricating structure of the sprocket sleeve of the coal mining machine gear box, the sleeve is driven to rotate by the rotating shaft, and the top of the slide rod fits the end of the sleeve. When the concave arc groove provided at the end of the sleeve rotates to fit with the slide rod, the slide rod slides upward due to the force of the second elastic member, so that the connection between the end of the high-pressure nozzle and the infusion pipe is in an open state. At this time, the lubricating oil inside the infusion pipe is subjected to the pressure of the sealing pressure plate, so that the lubricating oil flows to the port of the high-pressure nozzle and is instantly sprayed out, thereby intermittently spraying the lubricating oil into the liquid inlet hole. While automatically lubricating the space between the sleeve and the rotating shaft, the lubricating oil is intermittently sprayed on the sleeve, thereby improving the utilization efficiency of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is described in more detail below by way of example with reference to the accompanying drawings, in which:

[0015] Figure 1 It is an expanded view of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the liquid supply component of the utility model;

[0017] Figure 3 It is a cross-sectional view of the injection assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the shaft sleeve structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the overall structure of the utility model.

[0020] The meaning of each number in the figure is:

[0021] 100, housing; 101, sprocket; 102, sleeve; 103, liquid inlet hole; 104, concave arc groove; 105, lubricating liquid tank; 200, liquid supply assembly; 201, sealing pressure plate; 202, first elastic member;

[0022] 300, spray assembly; 301, infusion tube; 302, slide rod; 303, second elastic member; 304, high-pressure nozzle. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The purpose of this embodiment is to provide a self-lubricating structure of the sprocket sleeve of the gear box of a coal mining machine, such as Figure 1-5 As shown, it includes a box body 100, a sprocket 101 is arranged inside the box body 100, a rotating shaft is arranged on the inner wall of the sprocket 101, a sleeve 102 is arranged between the rotating shaft and the sprocket 101, a groove is arranged at the end of the sleeve 102, a liquid inlet hole 103 is arranged in the groove, and the liquid inlet holes 103 are arranged in a row, a concave arc groove 104 is arranged at the end of the sleeve 102, and a spray assembly 300 is arranged below the sleeve 102;

[0025] A lubricating liquid tank 105 is provided inside the housing 100, and a liquid supply assembly 200 is provided inside the lubricating liquid tank 105. The liquid supply assembly 200 squeezes the internal lubricating liquid so that the lubricating liquid is automatically sprayed to the liquid inlet hole 103 intermittently through the spray assembly 300 to lubricate the shaft sleeve 102 and the rotating shaft.

[0026] The improvement of this embodiment is that the shaft drives the sleeve 102 to rotate, and the top of the slide bar 302 fits the end of the sleeve 102. When the concave arc groove 104 provided at the end of the sleeve 102 rotates to fit with the slide bar 302, the slide bar 302 slides upward due to the force of the second elastic member 303, so that the connection between the end of the high-pressure nozzle 304 and the infusion tube 301 is in an open state. At this time, the lubricating oil inside the infusion tube 301 is subjected to the pressure of the sealing pressure plate 201, so that the lubricating oil flows to the port of the high-pressure nozzle 304 and is instantly sprayed out, thereby intermittently spraying the lubricating oil into the liquid inlet hole 103. While automatically lubricating the space between the sleeve 102 and the shaft, the lubricating oil is intermittently sprayed on the sleeve 102, thereby improving the efficiency of lubricating oil utilization.

[0027] When the gearbox is working, the shaft and the sleeve 102 are prone to wear, and the sleeve 102 needs to be replaced frequently, which affects the working efficiency. Therefore, the liquid supply component 200 includes a sealing pressure plate 201 arranged inside the liquid inlet hole 103. The sealing pressure plate 201 moves inside the lubricating liquid tank 105. A first elastic member 202 is provided between the sealing pressure plate 201 and the lubricating liquid tank 105. The sealing pressure plate 201 is squeezed and fitted to slide on the inner wall of the lubricating liquid tank 105 by the first elastic member 202. The sealing pressure plate 201 slides inside the lubricating liquid tank 105 under the force of the first elastic member 202, thereby squeezing the lubricating liquid inside the lubricating liquid tank 105, so that the lubricating liquid is intermittently sprayed on the sleeve 102 through the injection assembly 300, thereby reducing the friction between the sleeve 102 and the shaft, increasing the practical life of the sleeve 102, and thus improving the working efficiency.

[0028] In order to prevent the lubricating oil from flowing through the gap between the sealing plate 201 and the lubricating liquid tank 105, which would reduce the pressure on the lubricating oil and affect the injection intensity on the shaft sleeve 102, a rubber pad is provided on the side wall of the sealing plate 201. The rubber pad seals the gap between the sealing plate 201 and the lubricating liquid tank 105 during the downward movement of the sealing plate 201. The rubber pad seals the sealing plate 201 and the lubricating liquid tank 105, so that the lubricating oil in the lubricating liquid tank 105 is subjected to the pressure of the sealing plate 201, thereby maintaining the injection intensity of the shaft sleeve 102.

[0029] When lubricating the shaft sleeve 102, it is necessary to stop the machine, disassemble the box body 100, and then lubricate the shaft sleeve 102, which is quite time-consuming. In order to facilitate the automatic lubrication of the shaft sleeve 102 during rotation, the injection assembly 300 includes an infusion tube 301 arranged below the shaft sleeve 102, the end of the infusion tube 301 passes through the side wall of the lubricating liquid tank 105, and the inner wall of the infusion tube 301 is slidably connected with a slide bar 302. The side wall of the infusion tube 301 is provided with a high-pressure nozzle 304, and the high-pressure nozzle 304 is located above the bottom of the slide bar 302. A second elastic member 303 is provided between the slide bar 302 and the infusion tube 301. The slide bar 302 is pressed against the bottom of the end of the shaft sleeve 102 by the force of the second elastic member 303. When the concave arc groove 104 at the end of the shaft sleeve 102 rotates to the slide bar 302, the slide bar 302 is moved upward by the force of the second elastic member 303, so that the high-pressure nozzle 3 304, the lubricating oil in the infusion tube 301 is subjected to pressure and is sprayed toward the liquid inlet hole 103 through the high-pressure nozzle 304. When the shaft drives the sleeve 102 to rotate, the top of the slide bar 302 fits the end of the sleeve 102. When the concave arc groove 104 provided at the end of the sleeve 102 rotates to fit with the slide bar 302, the slide bar 302 slides upward under the force of the second elastic member 303, so that the connection between the end of the high-pressure nozzle 304 and the infusion tube 301 is in an open state. At this time, the lubricating oil inside the infusion tube 301 is subjected to pressure from the sealing pressure plate 201, so that the lubricating oil flows to the port of the high-pressure nozzle 304 and is sprayed out instantly, thereby intermittently spraying the lubricating oil into the liquid inlet hole 103, while lubricating the space between the sleeve 102 and the shaft, reducing the waste of lubricating oil and improving the self-lubricating efficiency.

[0030] In order to improve the spraying effect on the liquid inlet hole 103 and increase the spraying area, the spray port of the infusion tube 301 is at an angle of 15° with the bottom of the sleeve 102, thereby increasing the contact area between the lubricating liquid sprayed from the spray port of the infusion tube 301 and the liquid inlet hole 103. By setting the infusion tube 301 at an inclined angle, the contact area with the liquid inlet hole 103 can be increased when the infusion tube 301 is spraying, thereby improving the spraying effect.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-lubricating structure for a sprocket sleeve of a coal mining machine gear box, characterized in that: The invention comprises a box body (100), wherein a sprocket (101) is arranged inside the box body (100), a rotating shaft is arranged on the inner wall of the sprocket (101), a shaft sleeve (102) is arranged between the rotating shaft and the sprocket (101), a groove is arranged at the end of the shaft sleeve (102), liquid inlet holes (103) are arranged in a row, a concave arc groove (104) is arranged at the end of the shaft sleeve (102), and a spray assembly (300) is arranged below the shaft sleeve (102); A lubricating liquid tank (105) is provided inside the box body (100), and a liquid supply assembly (200) is provided inside the lubricating liquid tank (105). The liquid supply assembly (200) squeezes the internal lubricating liquid so that the lubricating liquid is automatically sprayed to the liquid inlet hole (103) intermittently through the spray assembly (300) to lubricate the shaft sleeve (102) and the rotating shaft.

2. The self-lubricating structure of the sprocket sleeve of the gear box of the coal mining machine according to claim 1, characterized in that: The liquid supply assembly (200) comprises a sealing pressure plate (201) arranged inside the liquid inlet hole (103); the sealing pressure plate (201) moves inside the lubricating liquid tank (105); a first elastic member (202) is provided between the sealing pressure plate (201) and the lubricating liquid tank (105); the sealing pressure plate (201) is pressed and fitted to slide on the inner wall of the lubricating liquid tank (105) by the first elastic member (202).

3. The self-lubricating structure of the sprocket sleeve of the gear box of the coal mining machine according to claim 2, characterized in that: A rubber pad is provided on the side wall of the sealing pressure plate (201), and the rubber pad seals the gap between the sealing pressure plate (201) and the lubricating liquid tank (105) when the sealing pressure plate (201) moves downward.

4. The self-lubricating structure of the sprocket sleeve of the gear box of the coal mining machine according to claim 1, characterized in that: The injection assembly (300) includes a liquid infusion tube (301) disposed below the shaft sleeve (102), the end of the liquid infusion tube (301) passing through the side wall of the lubricating liquid tank (105), the inner wall of the liquid infusion tube (301) is slidably connected to a sliding rod (302), and the side wall of the liquid infusion tube (301) is provided with a high-pressure nozzle (304), and the high-pressure nozzle (304) is located above the bottom of the sliding rod (302).

5. The self-lubricating structure of the sprocket sleeve of the gear box of the coal mining machine according to claim 4, characterized in that: A second elastic member (303) is provided between the slide bar (302) and the infusion tube (301). The slide bar (302) is pressed against the bottom of the end of the shaft sleeve (102) by the force of the second elastic member (303). When the concave arc groove (104) at the end of the shaft sleeve (102) rotates to the slide bar (302), the slide bar (302) is moved upward by the force of the second elastic member (303), so that the connection between the high-pressure nozzle (304) and the infusion tube (301) is in an open state, and the lubricating oil in the infusion tube (301) is pressurized to be sprayed to the liquid inlet hole (103) through the high-pressure nozzle (304).

6. The self-lubricating structure of the sprocket sleeve of the gear box of the coal mining machine according to claim 5, characterized in that: The injection port of the infusion tube (301) and the bottom of the shaft sleeve (102) form an angle of 15°, thereby increasing the contact area between the lubricating liquid sprayed from the injection port of the infusion tube (301) and the liquid inlet hole (103).

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