An automatic forced lubrication system applied to the rocker arm of a shearer

Abstract

The present application relates to an automatic forced lubrication system applied to a shearer rocker arm, belonging to the technical field of shearers. It includes that a first oil collecting hole, a second oil collecting hole, a first oil injection hole and a second oil injection hole are formed on the rocker arm body. A power source is also provided on the rocker arm body. A collecting oil pipe and a conveying pipe are connected and communicated with the power source. The first oil collecting hole and the second oil collecting hole are both communicated with the collecting oil pipe, and the first oil injection hole and the second oil injection hole are both communicated with the conveying pipe. When the rocker arm body is lifted, the gear oil in the cavity is transported from the second oil collecting hole through the collecting oil pipe to the conveying pipe under the action of the power source, and the gear is lubricated through the first oil injection hole; when the rocker arm body is in the floor, the gear oil in the cavity is transported from the first oil collecting hole through the collecting oil pipe to the conveying pipe under the action of the power source, and the gear is lubricated through the second oil injection hole. The present application has the effect of enabling the gears and bearings located in the rocker arm to be lubricated.

Description

Technical Field

[0001] This application relates to the technical field of shearers, and in particular to an automatic forced lubrication system applied to the rocker arm of a shearer. Background Art

[0002] A shearer is one of the important devices for realizing the mechanization and modernization of coal mine production. A shearer includes a rocker arm. One end of the rocker arm is rotatably connected with a cutting drum for mining, and the other end of the rocker arm is provided with a driving source for driving the cutting drum to rotate. A multi-stage gear transmission mechanism is arranged in the cavity of the rocker arm. The gear transmission mechanism includes a plurality of gears and a plurality of bearings, and the gear transmission mechanism is used to transmit the power of the driving source to the cutting drum.

[0003] Since the transmission power of the gear transmission mechanism is relatively large, the loads on the gears and bearings are also relatively large. In order to ensure the normal operation of the gear transmission mechanism, gear oil needs to be injected into the cavity of the rocker arm. However, during actual use, when the rocker arm is raised, the gear oil concentrates at one end of the rocker arm far from the cutting drum, and the gears and bearings in the cavity of the rocker arm close to the cutting drum cannot be lubricated. When the rocker arm is in the floor, the gear oil concentrates at one end of the rocker arm close to the cutting drum, and the gears and bearings in the cavity of the rocker arm far from the cutting drum are not easily lubricated, resulting in increased wear of the gears and bearings. In severe cases, it will also cause the entire rocker arm to be difficult to use normally, affecting the production of the mine. Summary of the Invention

[0004] In order to enable the gears and bearings located in the rocker arm to be lubricated, this application provides an automatic forced lubrication system applied to the rocker arm of a shearer.

[0005] The automatic forced lubrication system applied to the rocker arm of a shearer provided by this application adopts the following technical solutions:

[0006] An automatic forced lubrication system applied to the rocker arm of a shearer includes a rocker arm body. A cavity for placing a gear transmission mechanism is arranged in the rocker arm body. A first oil collecting hole and a second oil collecting hole communicating with the cavity are formed in the rocker arm body. The first oil collecting hole and the second oil collecting hole are respectively located at both ends of the rocker arm body. A first oil injection hole and a second oil injection hole communicating with the cavity are also formed in the rocker arm body. The first oil injection hole and the second oil injection hole respectively aim at the gears located at both ends of the cavity. A power source is also arranged on the rocker arm body. A collecting oil pipe and a conveying pipe are connected and communicated with the power source. The ends of the collecting oil pipe and the conveying pipe far from the power source are both connected with the rocker arm body. The first oil collecting hole and the second oil collecting hole are both communicated with the collecting oil pipe. The first oil injection hole and the second oil injection hole are both communicated with the conveying pipe. The power source is used to lubricate the gears and bearings through the first oil injection hole and the second oil injection hole with gear oil.

[0007] By adopting the above technical solution, when the rocker arm body is lifted, the gear oil in the cavity sequentially passes through the second oil collecting hole, the oil collecting pipe, the conveying pipe and the first oil injection hole under the action of the power source, and lubricates the gear and bearing located at one end of the cavity through the first oil injection hole; when the rocker arm body lies on the ground, the gear oil in the cavity sequentially passes through the first oil collecting hole, the oil collecting pipe, the conveying pipe and the second oil injection hole under the action of the power source, and lubricates the gear and bearing located at the other end of the cavity through the second oil injection hole, so that the gears and bearings located in the cavity of the rocker arm body can be lubricated, and the service life of the gear transmission mechanism is prolonged.

[0008] Preferably, the first oil injection hole is located at one end of the swing arm body close to the cutting drum. There are multiple first oil injection holes. A second oil injection pipe and multiple first oil injection pipes are arranged on the swing arm body. The second oil injection pipe and the multiple first oil injection pipes are both connected and communicated with the conveying pipe. One ends of the multiple first oil injection pipes away from the conveying pipe respectively pass through the multiple first oil injection holes and extend into the cavity, and one end of the second oil injection pipe away from the conveying pipe passes through the second oil injection hole and extends into the cavity.

[0009] By adopting the above technical solution, since the first oil injection hole is located at one end of the rocker arm body close to the cutting drum, and there are multiple first oil injection holes, the gears and bearings in the cavity close to the cutting drum can be fully lubricated, and the reliability of driving the cutting drum to rotate through the gear transmission mechanism is improved; through the arrangement of the first oil injection pipe and the second oil injection pipe, by controlling the lengths of the first oil injection pipe and the second oil injection pipe extending into the cavity, the gears and bearings in the cavity can be better lubricated, and the quality of lubricating the gears and bearings in the cavity is improved.

[0010] Preferably, oil dripping holes are formed in the multiple first oil injection pipes. The oil dripping holes are located in the cavity. The number of oil dripping holes on the first oil injection pipe close to the power source is less than that on the first oil injection pipe away from the power source.

[0011] By adopting the above technical solution, through the arrangement of the oil dripping holes, the lubrication range of the first oil injection pipe for the gears and bearings is expanded, and the quality of lubricating the gears and bearings in the cavity is improved. And when installing, making the number of oil dripping holes on the first oil injection pipe close to the power source more than that on the first oil injection pipe away from the power source can make the gear oil flowing into the cavity from the oil dripping holes on different first oil injection pipes relatively uniform, and better lubricate the gears and bearings in the cavity.

[0012] Preferably, a connecting pipe is provided on the rocker arm body. The connecting pipe is connected and communicated with the control valve. A plurality of the first fuel injection pipes are all connected and communicated with the connecting pipe. A control valve is further provided on the rocker arm body. The delivery pipe, the connecting pipe and the second fuel injection pipe are all connected and communicated with the control valve. The control valve is used to control the communication between the delivery pipe and the connecting pipe or the second fuel injection pipe.

[0013] By adopting the above technical solution, a plurality of the first fuel injection pipes are integrated on the connecting pipe, which is convenient for controlling the opening and closing of the plurality of the first fuel injection pipes by controlling the opening and closing of the connecting pipe. Through the arrangement of the control valve, when the rocker arm body is lifted, the delivery pipe is communicated with the first fuel injection pipe, and when the rocker arm body lies on the ground, the delivery pipe is communicated with the second fuel injection pipe, so that the automatic forced lubrication system can lubricate the gears and bearings located in the cavity in a targeted manner according to the state of the rocker arm, and the quality of lubricating the gears and bearings located in the cavity is improved.

[0014] Preferably, the control valve includes a valve body and a valve core. The valve core is rotatably arranged in the valve body. An oil inlet, a first oil outlet, a second oil outlet and an oil return port are opened on the valve body. The oil inlet is communicated with the delivery pipe. The first oil outlet is communicated with the connecting pipe. The second oil outlet is communicated with the second fuel injection pipe. An oil return hole communicated with the cavity is opened on the swing arm body. The oil return hole is communicated with the oil return port. An oil inlet hole, a first oil delivery hole, a second oil delivery hole, a third oil delivery hole and an oil passing hole are opened on the valve core. The oil inlet hole, the first oil delivery hole, the second oil delivery hole and the third oil delivery hole are all communicated with the oil passing hole. The oil inlet hole is communicated with the oil inlet. After the valve core rotates, the first oil delivery hole is communicated with the first oil outlet or the second oil delivery hole is communicated with the second oil outlet or the third oil delivery hole is communicated with the oil return port. A rotating assembly for driving the valve core to rotate is provided on the rocker arm body.

[0015] By adopting the above technical solution, the valve core rotates under the action of the rotating assembly. When the rocker arm body is in the horizontal state, the valve core rotates until the third oil supply hole communicates with the oil return port, and the gear oil in the conveying pipe sequentially returns to the cavity through the oil inlet, the oil inlet hole, the oil passing hole, the oil return port and the oil return pipe; when the rocker arm body is lifted, the valve core rotates until the first oil supply hole communicates with the first oil outlet, and the gear oil in the conveying pipe sequentially enters the cavity through the oil inlet, the oil inlet hole, the oil passing hole, the first oil supply hole, the first oil outlet, the connecting pipe and the first oil spray pipe, and lubricates the gears and bearings in the cavity close to the cutting drum; when the rocker arm body is on the ground, the valve core rotates until the second oil supply hole communicates with the second oil outlet, and the gear oil in the conveying pipe sequentially enters the cavity through the oil inlet, the oil inlet hole, the oil passing hole, the second oil supply hole, the second oil outlet and the second oil spray pipe, and lubricates the gears and bearings in the cavity far from the cutting drum; according to the state of the rocker arm body, the valve core can be rotated by a certain angle relative to the valve body, so as to facilitate the control of the opening and closing between the conveying pipe and the connecting pipe or the second oil spray pipe or the oil return hole.

[0016] Preferably, the rotating assembly includes a rotating gear coaxially arranged with the valve core, a rack slidably connected to the rocker arm body and meshing with the rotating gear, first and second electromagnets are respectively arranged at both ends of the rack, the first and second electromagnets are both connected to the rocker arm body, and a control elastic member for making the rack located between the first and second electromagnets is arranged on the rocker arm body. When the rack is located between the first and second electromagnets, the third oil supply hole communicates with the oil return port. When the rack slides to fit with the first electromagnet, the first oil supply hole communicates with the first oil outlet. When the rack slides to fit with the second electromagnet, the second oil supply hole communicates with the second oil outlet. A control member for controlling the operation of the first or second electromagnet is arranged on the valve body.

[0017] By adopting the above technical solution, when the rocker arm body is in the horizontal state, the rack maintains the state of being located between the first and second electromagnets under the elastic action of the control elastic member. At this time, the third oil supply hole communicates with the oil return port. When the rocker arm body is lifted, the control member energizes the first electromagnet to make the rack slide to fit with the first electromagnet. When the rack slides, it drives the valve core to rotate until the first oil supply hole communicates with the first oil outlet through the rotating gear. When the rocker arm body is on the ground, the control member energizes the second electromagnet to make the rack slide to fit with the second electromagnet. When the rack slides, it drives the valve core to rotate until the second oil supply hole communicates with the second oil outlet through the rotating gear. With the cooperation of the rotating gear, the rack, the first electromagnet and the second electromagnet, it is convenient to control the rotation angle of the valve core in the valve body, so as to facilitate the control of the opening and closing between the conveying pipe and the connecting pipe or the second oil spray pipe or the oil return hole.

[0018] Preferably, the control member is a swing angle collector, which is connected to the rocker arm body and electrically connected to both the first electromagnet and the second electromagnet.

[0019] By adopting the above technical solution, the swing angle collector can automatically judge whether to energize the first electromagnet or the second electromagnet according to the state of the rocker arm body, improving the automation degree of controlling the rotation of the control valve core in the valve body.

[0020] Preferably, a ball is slidably connected to the valve core, a positioning groove for the ball to embed is formed on the inner wall of the valve body, and a driving elastic member for driving the ball to slide away from the valve body is provided on the valve core. When the ball is located in the positioning groove, the third oil supply hole is communicated with the oil return port.

[0021] By adopting the above technical solution, when the rocker arm body is in a horizontal state, with the cooperation of the ball, the positioning groove and the control elastic member, the valve core can rotate the ball into the positioning groove, so that the valve body can accurately rotate until the third oil supply hole is communicated with the oil return port, improving the reliability of controlling the opening and closing between the delivery pipe and the connecting pipe or the second fuel injection pipe or the oil return hole through the rotation of the valve core.

[0022] Preferably, an oil collecting block is further provided on the rocker arm body. The oil collecting block is provided with a first oil collecting port, a second oil collecting port and a delivery port. The oil collecting pipe is connected to the oil collecting block and communicated with the delivery port. A first oil inlet pipe and a second oil inlet pipe are connected to the oil collecting block. The ends of the first oil inlet pipe and the second oil inlet pipe away from the oil collecting block are both connected to the rocker arm body. The two ends of the first oil inlet pipe are respectively communicated with the first oil collecting port and the first oil collecting hole, and the two ends of the second oil inlet pipe are respectively communicated with the second oil collecting port and the second oil collecting hole.

[0023] By adopting the above technical solution, the gear oil flowing from the first oil collecting hole and the second oil collecting hole to the oil collecting pipe first concentrates in the oil collecting block and then enters the oil collecting pipe through the oil collecting block, and it is not easy to have the situation that a large amount of air is doped in the gear oil entering the gear pump from the oil collecting pipe, thereby improving the stability of the gear oil flowing into the cavity from the first fuel injection pipe and the second fuel injection pipe and improving the lubrication quality of the gears and bearings in the cavity.

[0024] Preferably, a valve plate is rotatably connected in the oil collecting block. The valve plate is connected to the valve core. When the valve core rotates to make the first oil supply hole communicate with the first oil outlet, the valve plate rotates to block the communication between the first oil collecting port and the delivery port. When the valve core rotates to make the second oil supply hole communicate with the second oil outlet, the valve plate rotates to block the communication between the second oil collecting port and the delivery port. When the third oil supply hole communicates with the oil return port, both the first oil collecting port and the second oil collecting port communicate with the delivery port.

[0025] By adopting the above technical solution, the rotation of the valve core plate drives the rotation of the valve plate located in the oil collecting block. When the valve core rotates to connect the first oil supply hole with the first oil outlet, the rocker arm body is in the raised state, and the valve plate rotates to close the connection between the first oil collecting port and the delivery port. When the valve core rotates to connect the second oil supply hole with the second oil outlet, the rocker arm body is in the lying state, and the valve plate rotates to close the connection between the second oil collecting port and the delivery port. When the valve core rotates to connect the third oil supply hole with the oil return port, the rocker arm body is in the horizontal state, and the valve plate rotates to connect both the first oil collecting port and the second oil collecting port with the delivery port, further reducing the air content doped in the gear oil delivered to the oil collecting pipe, improving the stability of the gear oil flowing into the cavity from the first oil injection pipe and the second oil injection pipe, and enhancing the lubrication quality of the gears and bearings in the cavity.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. When the rocker arm body is raised, the gear oil in the cavity sequentially passes through the second oil collecting hole, the oil collecting pipe, the delivery pipe, and the first oil injection hole under the action of the power source, and lubricates the gears and bearings at one end of the cavity through the first oil injection hole. When the rocker arm body lies down, the gear oil in the cavity sequentially passes through the first oil collecting hole, the oil collecting pipe, the delivery pipe, and the second oil injection hole under the action of the power source, and lubricates the gears and bearings at the other end of the cavity through the second oil injection hole, so that the gears and bearings in the cavity of the rocker arm body can be lubricated, extending the service life of the gear transmission mechanism;

[0028] 2. Through the setting of the control valve, when the rocker arm body is raised, the delivery pipe is connected to the first oil injection pipe, and when the rocker arm body lies down, the delivery pipe is connected to the second oil injection pipe, so that the automatic forced lubrication system can lubricate the gears and bearings in the cavity targeted according to the state of the rocker arm, improving the lubrication quality of the gears and bearings in the cavity. Description of the Drawings

[0029] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application.

[0030] Figure 2 is the internal structural schematic diagram of the swing arm body of Embodiment 1 of the present application.

[0031] Figure 3 is the overall structural schematic diagram of another perspective of Embodiment 1 of the present application.

[0032] Figure 4 is the connection structural schematic diagram of the oil collecting block and the gear pump in Embodiment 1 of the present application.

[0033] Figure 5 is the structural schematic diagram of the rotating assembly in Embodiment 1 of the present application.

[0034] Figure 6 It is a schematic diagram of the overall structure of the control valve in Embodiment 1 of the present application.

[0035] Figure 7 It is a perspective view of the internal structure of the valve core in Embodiment 1 of the present application.

[0036] Figure 8 is Figure 3 an enlarged view of part A in

[0037] Figure 9 It is a schematic diagram of the connection structure between the control valve and the oil collecting block in Embodiment 2 of the present application.

[0038] Description of the reference numerals: 1. Rocker arm body; 11. Cutting drum; 12. Cavity; 121. First oil collecting hole; 122. Second oil collecting hole; 123. First oil injection hole; 124. Second oil injection hole; 125. Oil return hole; 13. Gear transmission mechanism; 131. Linkage gear; 132. Power gear; 133. Transmission gear; 14. Control valve; 15. Rotating motor; 2. Oil collecting block; 21. First oil collecting port; 211. First oil inlet pipe; 22. Second oil collecting port; 221. Second oil inlet pipe; 23. Delivery port; 24. Valve plate; 25. Connecting rod; 3. Gear pump; 31. Feed pipe; 311. Oil collecting pipe; 32. Discharge pipe; 321. Delivery pipe; 33. Power shaft; 4. Valve body; 41. Oil inlet; 42. First oil outlet; 421. Connecting pipe; 422. First oil injection pipe; 423. Oil dripping hole; 43. Second oil outlet; 431. Second oil injection pipe; 44. Oil return port; 45. Sealing sleeve; 46. Positioning groove; 5. Valve core; 51. Oil inlet hole; 511. Oil inlet sub-hole; 52. First oil delivery hole; 53. Second oil delivery hole; 54. Third oil delivery hole; 55. Oil passing hole; 56. Ball; 561. Fixed chute; 562. Driving spring; 6. Rotating assembly; 61. Rotating gear; 62. Rack; 621. Dovetail block; 622. Sliding groove; 63. First electromagnet; 64. Second electromagnet; 65. Swing angle collector; 66. Control spring. Detailed implementation manners

[0039] The following further elaborates on the present application in conjunction with the attached Figure 1-9 drawings.

[0040] Embodiment 1 of the present application discloses an automatic forced lubrication system applied to the rocker arm of a shearer.

[0041] Embodiment 1:

[0042] Referring to Figure 1 and Figure 2, including a rocker arm body 1, one end of the rocker arm body 1 is rotatably connected with a cutting drum 11 for mining, the other end of the rocker arm body 1 is provided with a driving source for driving the cutting drum 11 to rotate, a cavity 12 is arranged inside the rocker arm body 1, and a multi-stage gear transmission mechanism 13 is arranged inside the cavity 12. The gear transmission mechanism 13 includes a plurality of gears and bearings. Among them, the gear close to the cutting drum 11 is called a linkage gear 131, and the gear close to the driving source is called a power gear 132. In this embodiment, the driving source is a rotating motor 15, the output shaft of the rotating motor 15 is coaxially fixed with the power gear 132, the linkage gear 131 is coaxially fixed with the input shaft of the cutting drum 11. When the rotating motor 15 is started, the power gear 132 rotates under the action of the rotating motor 15, and the linkage gear 131 rotates under the action of gear transmission and drives the cutting drum 11 to rotate.

[0043] Refer to Figure 1 and Figure 2 , in order to lubricate the gears and bearings located in the cavity 12, the rocker arm body 1 is provided with a first oil collecting hole 121, a second oil collecting hole 122, a first oil injection hole 123 and a second oil injection hole 124 communicating with the cavity 12. The first oil collecting hole 121 and the first oil injection hole 123 are located at one end of the rocker arm body 1 close to the cutting drum 11, and the second oil collecting hole 122 and the second oil injection hole 124 are located at one end of the rocker arm body 1 close to the rotating motor 15. There are three first oil injection holes 123, and the three first oil injection holes 123 respectively correspond to three gears close to the cutting drum 11 in the cavity 12. There is one second oil injection hole 124, and the second oil injection hole 124 is located on one side of the rocker arm body 1 close to the power gear 132.

[0044] Refer to Figure 1 , Figure 3 and Figure 4 , an oil collecting block 2 is fixedly connected to the rocker arm body 1. The oil collecting block 2 is provided with a first oil collecting port 21, a second oil collecting port 22 and a conveying port 23. A first oil inlet pipe 211 and a second oil inlet pipe 221 are fixedly connected to the oil collecting block 2. The ends of the first oil inlet pipe 211 and the second oil inlet pipe 221 away from the oil collecting block 2 are fixed to the rocker arm body 1. The two ends of the first oil inlet pipe 211 are respectively communicated with the first oil collecting hole 121 and the first oil collecting port 21, and the two ends of the second oil inlet pipe 221 are respectively communicated with the second oil collecting hole 122 and the second oil collecting port 22. When the rocker arm body 1 is lifted, the gear oil in the cavity 12 sequentially enters the oil collecting block 2 through the second oil collecting hole 122, the second oil inlet pipe 221 and the second oil collecting port 22. When the rocker arm body 1 lies on the bottom, the gear oil in the cavity 12 sequentially enters the oil collecting block 2 through the first oil collecting hole 121, the first oil inlet pipe 211 and the first oil collecting port 21.

[0045] Refer to Figure 3 and Figure 4, a power source is fixedly connected to the rocker arm body 1. In this embodiment, the power source is a gear pump 3. The gear pump 3 includes a feed pipe 31 and a discharge pipe 32. A collecting oil pipe 311 communicating with the delivery port 23 is fixedly connected to the oil collecting block 2. The other end of the collecting oil pipe 311 is fixed to the gear pump 3 and communicates with the feed pipe 31. Through the arrangement of the gear pump 3, it is convenient for the gear oil in the cavity 12 to enter the oil collecting block 2 through the first oil collecting hole 121 or the second oil collecting hole 122. The gear oil located in the oil collecting block 2 enters the gear pump 3 through the feed pipe 31. The gear pump 3 further includes a power shaft 33. The gear transmission mechanism 13 includes a transmission gear 133. The power shaft 33 of the gear pump 3 is coaxially fixed to the transmission gear 133. When the rotating motor 15 is started, the transmission gear 133 rotates under the action of gear transmission, thereby driving the power shaft 33 of the gear pump 3 to rotate, enabling the gear pump 3 to work properly and saving energy.

[0046] Refer to Figure 1 , Figure 3 and Figure 5 , a control valve 14 is fixedly connected to the rocker arm body 1. The control valve 14 includes a valve body 4 and a valve core 5. The valve core 5 is rotatably arranged in the valve body 4. The valve body 4 is provided with an oil inlet 41, a first oil outlet 42, a second oil outlet 43 and an oil return port 44. A delivery pipe 321 communicating with the oil inlet 41 is fixedly connected to the valve body 4. The other end of the delivery pipe 321 is fixed to the gear pump 3 and communicates with the discharge pipe 32. The gear oil located in the gear pump 3 enters the delivery pipe 321 through the discharge pipe 32. A connecting pipe 421 communicating with the first oil outlet 42 is fixedly connected to the valve body 4. Three first oil spray pipes 422 communicating with the connecting pipe 421 are fixedly connected to the connecting pipe 421. The ends of the three first oil spray pipes 422 far from the connecting pipe 421 respectively pass through three first oil spraying holes 123 and extend into the cavity 12. The outer diameter of the first oil spray pipe 422 fits the inner diameter of the first oil spraying hole 123. A second oil spray pipe 431 communicating with the second oil outlet 43 is fixedly connected to the valve body 4. The end of the second oil spray pipe 431 far from the valve body 4 passes through the second oil spraying hole 124 and extends into the cavity 12. An oil return hole 125 communicating with the cavity 12 is provided on the rocker arm body 1. The valve body 4 is in contact with the rocker arm body 1, so that the oil return port 44 on the valve body 4 communicates with the oil return hole 125 on the rocker arm body 1.

[0047] Refer to Figure 5 , Figure 6 and Figure 7, an oil inlet hole 51, a first oil delivery hole 52, a second oil delivery hole 53, a third oil delivery hole 54 and an oil passing hole 55 are formed in the valve core 5. The oil inlet hole 51, the first oil delivery hole 52, the second oil delivery hole 53 and the third oil delivery hole 54 are all communicated with the oil passing hole 55. The oil inlet hole 51 is communicated with the oil inlet 41. When the rocker arm body 1 is in a horizontal state, the valve core 5 is not easy to rotate. At this time, the third oil delivery hole 54 is communicated with the oil return port 44. The gear oil in the delivery pipe 321 sequentially returns to the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil passing hole 55, the oil return port 44 and the oil return hole 125; when the rocker arm body 1 is lifted, the valve core 5 rotates until the first oil delivery hole 52 is communicated with the first oil outlet 42. The gear oil in the delivery pipe 321 sequentially enters the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil passing hole 55, the first oil delivery hole 52, the first oil outlet 42, the connecting pipe 421 and the first oil injection pipe 422, and lubricates the gears in the cavity 12 near the cutting drum 11; when the rocker arm body 1 is in the floor, the valve core 5 rotates until the second oil delivery hole 53 is communicated with the second oil outlet 43. The gear oil in the delivery pipe 321 sequentially enters the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil passing hole 55, the second oil delivery hole 53, the second oil outlet 43 and the second oil injection pipe 431, and lubricates the gears in the cavity 12 near the rotating motor 15; the oil inlet hole 51 is provided with three oil inlet sub-holes 511. After the valve core 5 rotates, one of the oil inlet sub-holes 511 can be communicated with the oil inlet 41; a sealing sleeve 45 is arranged in the valve body 4. Through the arrangement of the sealing sleeve 45, oil leakage is not easy to occur, and the reliability of controlling the flow direction of the gear oil by rotating the valve core 5 arranged in the valve body 4 is improved.

[0048] Refer to Figure 3 , Figure 5 and Figure 8, a rotating assembly 6 for driving the valve core 5 to rotate is provided on the rocker arm body 1. The rotating assembly 6 includes a rotating gear 61 fixedly connected coaxially with the valve core 5. A rack 62 meshing with the rotating gear 61 is slidably connected to the rocker arm body 1. An oil dovetail block 621 is fixedly connected to the side wall of the rack 62. A sliding groove 622 for the dovetail block 621 to slide is formed on the valve body 4, which improves the reliability of the sliding of the rack 62 on the rocker arm body 1. First electromagnets 63 and second electromagnets 64 are respectively arranged at both ends of the gear. Both the first electromagnet 63 and the second electromagnet 64 are fixed to the rocker arm body 1, and the first electromagnet 63 is located above the second electromagnet 64. A control member for controlling the operation of the first electromagnet 63 or the second electromagnet 64 is provided on the valve body 4. In this embodiment, the control member is selected as a swing angle collector 65. The swing angle collector 65 is fixed to the rocker arm body 1 and is electrically connected to both the first electromagnet 63 and the second electromagnet 64. When the rocker arm body 1 is lifted, the swing angle collector 65 energizes the first electromagnet 63, and the rack 62 slides towards the first electromagnet 63. When the rack 62 is in contact with the first electromagnet 63, the first oil supply hole 52 is communicated with the first oil outlet 42. When the rocker arm body 1 lies on the ground, the swing angle collector 65 energizes the second electromagnet 64, and the rack 62 slides towards the second electromagnet 64. When the rack 62 is in contact with the first electromagnet 63 and the second electromagnet 64 is in contact, the second oil supply hole 53 is communicated with the second oil outlet 43.

[0049] Refer to Figure 3 , Figure 5 and Figure 6 , a control elastic member for making the rack 62 located between the first electromagnet 63 and the second electromagnet 64 is provided on the rocker arm body 1. In this embodiment, the control elastic member is selected as a control spring 66. There are two control springs 66 and they are respectively located at both ends of the rack 62. One end of the control spring 66 is fixed to the rack 62, and the other end of the control spring 66 is fixed to the first electromagnet 63 or the second electromagnet 64. A ball 56 is slidably connected to the valve core 5. A fixed sliding groove 561 for the ball 56 to slide is formed on the valve core 5. The fixed sliding groove 561 is arranged along the radial direction of the valve core 5. A driving elastic member for driving the ball 56 to slide outwards of the fixed sliding groove 561 is provided on the valve core 5. In this embodiment, the driving elastic member is selected as a driving spring 562. One end of the driving spring 562 is fixed to the inner wall of the fixed sliding groove 561, and the other end of the driving spring 562 is fixed to the ball 56. A positioning groove 46 for the ball 56 to be embedded is formed on the valve body 4. When the ball 56 is embedded in the positioning groove 46, the third oil supply hole 54 is communicated with the oil return port 44, which improves the reliability of controlling the opening and closing between the delivery pipe 321 and the connecting pipe 421 or the second fuel injection pipe 431 or the oil return hole 125 through the rotation of the valve core 5.

[0050] Refer to Figure 2Three oil drip holes 423 are provided on the first oil injection pipe 422 close to the cutting drum 11, one oil drip hole 423 is provided on the first oil injection pipe 422 close to the rotating motor 15, and two oil drip holes 423 are provided on the first oil injection pipe 422 located between the two first oil injection pipes 422. By providing different numbers of oil drip holes 423 on the three first oil injection pipes 422, the gear located at one end of the cutting drum 11 can also be well lubricated, thereby improving the quality of the lubrication effect on the gears and bearings located in the cavity 12.

[0051] The implementation principle of an automatic forced lubrication system for a rocker arm of a coal mining machine according to an embodiment of the present application is as follows: when the rocker arm body 1 is raised, the swing angle collector 65 energizes the first electromagnet 63, the rack 62 slides to fit the first electromagnet 63, and the valve core 5 rotates to the first oil delivery hole 52 and communicates with the first oil outlet 42 under the cooperation of the rotating gear 61 and the rack 62, and the gear oil in the cavity 12 passes through the second oil collection hole 122, the second oil inlet pipe 221 and the second oil collection port 22 in sequence. The gear oil enters the oil collecting block 2, and the gear oil in the oil collecting block 2 enters the gear pump 3 through the feed pipe 31. The gear oil in the gear pump 3 enters the delivery pipe 321 through the discharge pipe 32. The gear oil in the delivery pipe 321 enters the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil hole 55, the first oil delivery hole 52, the first oil outlet 42, the connecting pipe 421 and the first oil injection pipe 422 in sequence, and lubricates the gears in the cavity 12 close to the cutting drum 11.

[0052] When the rocker arm body 1 is lying, the swing angle collector 65 energizes the second electromagnet 64, the rack 62 slides to fit the second electromagnet 64, and the valve core 5 rotates to the second oil delivery hole 53 and is connected to the second oil outlet 43 under the cooperation of the rotating gear 61 and the rack 62. The gear oil in the cavity 12 enters the oil collection block 2 through the first oil collection hole 121, the first oil inlet pipe 211 and the first oil collection port 21 in turn, the gear oil in the oil collection block 2 enters the gear pump 3 through the feed pipe 31, the gear oil in the gear pump 3 enters the delivery pipe 321 through the discharge pipe 32, and the gear oil in the delivery pipe 321 enters the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil hole 55, the second oil delivery hole 53, the second oil outlet 43 and the second oil injection pipe 431 in turn, and lubricates the gears in the cavity 12 close to the rotating motor 15.

[0053] When the rocker arm body 1 is in a horizontal state, the valve core 5 is located between the first electromagnet and the second electromagnet 64 under the action of the control spring 66. At this time, the valve core 5 is in a state where the third oil supply hole 54 is communicated with the oil return port 44. The gear oil in the cavity 12 can sequentially pass through the second oil collecting hole 122, the second oil inlet pipe 221 and the second oil collecting port 22 to enter the oil collecting block 2, and can also sequentially pass through the first oil collecting hole 121, the first oil inlet pipe 211 and the first oil collecting port 21 to enter the oil collecting block 2. The gear oil in the oil collecting block 2 enters the gear pump 3 through the feed pipe 31. The gear oil in the gear pump 3 enters the delivery pipe 321 through the discharge pipe 32. The gear oil in the delivery pipe 321 sequentially returns to the cavity 12 through the oil inlet 41, the oil inlet hole 51, the oil passing hole 55, the oil return port 44 and the oil return hole 125.

[0054] Embodiment 2:

[0055] The difference from Embodiment 1 is that with reference to Figure 9 , the first oil collecting port 21 and the second oil collecting port 22 are both perpendicular to the length direction of the valve core 5 and are arranged perpendicular to the length direction of the valve core 5. The first oil collecting port 21 is located above the second oil collecting port 22. The first oil collecting port 21, the second oil collecting port 22 and the delivery port 23 form a T shape. A valve plate 24 is rotatably connected in the oil collecting block 2. The valve plate 24 and the valve core 5 are fixed by a connecting rod 25. The connecting rod 25 is coaxially fixed with the valve core 5. The connecting rod 25 is located between the first oil collecting port 21 and the second oil collecting port 22. The valve plate 24 is arranged in a long strip waist shape, and one end of the connecting rod 25 is fixed to the valve plate 24.

[0056] When the valve core 5 rotates to the position where the first oil supply hole 52 is communicated with the first oil outlet 42, the rocker arm body 1 is in a raised state, and the valve plate 24 rotates to close the communication between the first oil collecting port 21 and the delivery port 23. When the valve core 5 rotates to the position where the second oil supply hole 53 is communicated with the second oil outlet 43, the rocker arm body 1 is in a lying state, and the valve plate 24 rotates to close the communication between the second oil collecting port 22 and the delivery port 23. When the valve core 5 rotates to the position where the third oil supply hole 54 is communicated with the oil return port 44, the rocker arm body 1 is in a horizontal state, and the valve plate 24 rotates to a state where both the first oil collecting port 21 and the second oil collecting port 22 are communicated with the delivery port 23, reducing the air content doped in the gear oil delivered to the oil collecting pipe 311 and improving the stability of the flow of the gear oil entering the cavity 12 from the first spray pipe 422 and the second spray pipe 431.

[0057] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. An automatic forced lubrication system applied to a shearer rocker arm, comprising a rocker arm body (1), wherein a cavity (12) for placing a gear transmission mechanism (13) is provided inside the rocker arm body (1). It is characterized in that: A first oil collecting hole (121) and a second oil collecting hole (122) communicating with the cavity (12) are formed in the rocker arm body (1), the first oil collecting hole (121) and the second oil collecting hole (122) are respectively located at two ends of the rocker arm body (1), a first oil injection hole (123) and a second oil injection hole (124) communicating with the cavity (12) are further formed in the rocker arm body (1), the first oil injection hole (123) and the second oil injection hole (124) are respectively aligned with the gears located at two ends of the cavity (12), a power source is further provided on the rocker arm body (1), an oil collecting pipe (311) and a conveying pipe (321) are connected and communicated with the power source, the ends of the oil collecting pipe (311) and the conveying pipe (321) far away from the power source are both connected with the rocker arm body (1), the first oil collecting hole (121) and the second oil collecting hole (122) are both communicated with the oil collecting pipe (311), the first oil injection hole (123) and the second oil injection hole (124) are both communicated with the conveying pipe (321), and the power source is used for lubricating the gears and bearings by injecting gear oil through the first oil injection hole (123) and the second oil injection hole (124). A control valve (14) is further provided on the rocker arm body (1), the conveying pipe (321), a connecting pipe (421) and a second oil spraying pipe (431) are all connected and communicated with the control valve (14), and the control valve (14) is used for controlling the communication between the conveying pipe (321) and the connecting pipe (421) or the second oil spraying pipe (431). The control valve (14) includes a valve body (4) and a valve core (5). The valve core (5) is rotatably arranged in the valve body (4). An oil inlet (41), a first oil outlet (42), a second oil outlet (43) and an oil return port (44) are formed in the valve body (4). The oil inlet (41) is communicated with a delivery pipe (321). The first oil outlet (42) is communicated with a connecting pipe (421). The second oil outlet (43) is communicated with a second fuel injection pipe (431). An oil return hole (125) communicated with the cavity (12) is formed in the rocker arm body (1). The oil return hole (125) is communicated with the oil return port (44). An oil inlet hole (51), a first oil delivery hole (52), a second oil delivery hole (53), a third oil delivery hole (54) and an oil passing hole (55) are formed in the valve core (5). The oil inlet hole (51), the first oil delivery hole (52), the second oil delivery hole (53) and the third oil delivery hole (54) are all communicated with the oil passing hole (55). The oil inlet hole (51) is communicated with the oil inlet (41). After the valve core (5) rotates, the first oil delivery hole (52) is communicated with the first oil outlet (42), or the second oil delivery hole (53) is communicated with the second oil outlet (43), or the third oil delivery hole (54) is communicated with the oil return port (44). A rotating assembly (6) for driving the valve core (5) to rotate is arranged on the rocker arm body (1); The rotating assembly (6) includes a rotating gear (61) arranged coaxially with the valve core (5). A rack (62) meshing with the rotating gear (61) is slidably connected to the rocker arm body (1). A first electromagnet (63) and a second electromagnet (64) are respectively arranged at both ends of the rack (62). The first electromagnet (63) and the second electromagnet (64) are both connected to the rocker arm body (1). A control elastic member for making the rack (62) located between the first electromagnet (63) and the second electromagnet (64) is arranged on the rocker arm body (1). When the rack (62) is located between the first electromagnet (63) and the second electromagnet (64), the third oil delivery hole (54) is communicated with the oil return port (44). When the rack (62) slides to fit with the first electromagnet (63), the first oil delivery hole (52) is communicated with the first oil outlet (42). When the rack (62) slides to fit with the second electromagnet (64), the second oil delivery hole (53) is communicated with the second oil outlet (43). A control member for controlling the operation of the first electromagnet (63) or the second electromagnet (64) is arranged on the valve body (4).

2. The automatic forced lubrication system applied to a shearer rocker arm according to claim 1, characterized in that: The first fuel injection holes (123) are located at one end of the rocker arm body (1) close to the cutting drum (11). There are multiple first fuel injection holes (123). A second fuel injection pipe (431) and multiple first fuel injection pipes (422) are provided on the rocker arm body (1). The second fuel injection pipe (431) and the multiple first fuel injection pipes (422) are both connected and communicated with the delivery pipe (321). One ends of the multiple first fuel injection pipes (422) far from the delivery pipe (321) respectively pass through the multiple first fuel injection holes (123) and extend into the cavity (12), and one end of the second fuel injection pipe (431) far from the delivery pipe (321) passes through the second fuel injection hole (124) and extends into the cavity (12).

3. The automatic forced lubrication system applied to the rocker arm of a shearer according to claim 2, characterized in that: Drip holes (423) are formed in the multiple first fuel injection pipes (422). The drip holes (423) are located in the cavity (12). The number of drip holes (423) in the first fuel injection pipe (422) close to the power source is less than the number of drip holes (423) in the first fuel injection pipe (422) far from the power source.

4. The automatic forced lubrication system applied to the rocker arm of a shearer according to claim 2 or 3, characterized in that: A connecting pipe (421) is provided on the rocker arm body (1). The connecting pipe (421) is connected and communicated with the control valve (14). The multiple first fuel injection pipes (422) are all connected and communicated with the connecting pipe (421).

5. The automatic forced lubrication system applied to the rocker arm of a shearer according to claim 1, characterized in that: The control component is selected as a swing angle collector (65). The swing angle collector (65) is connected to the rocker arm body (1). The swing angle collector (65) is electrically connected to both the first electromagnet (63) and the second electromagnet (64).

6. The automatic forced lubrication system applied to the rocker arm of a shearer according to claim 1, characterized in that: A ball (56) is slidably connected to the valve core (5). A positioning groove (46) for the ball (56) to be embedded is formed on the inner wall of the valve body (4). A driving elastic member for driving the ball (56) to slide away from the valve body (4) is provided on the valve core (5). When the ball (56) is located in the positioning groove (46), the third oil delivery hole (54) is communicated with the oil return port (44).

7. The automatic forced lubrication system applied to the rocker arm of a shearer according to claim 1, characterized in that: An oil collecting block (2) is further provided on the swing arm body (1). A first oil collecting port (21), a second oil collecting port (22) and a conveying port (23) are formed on the oil collecting block (2). The oil collecting pipe (311) is connected to the oil collecting block (2) and communicated with the conveying port (23). A first oil inlet pipe (211) and a second oil inlet pipe (221) are connected to the oil collecting block (2). The ends of the first oil inlet pipe (211) and the second oil inlet pipe (221) far from the oil collecting block (2) are both connected to the swing arm body (1). The two ends of the first oil inlet pipe (211) are respectively communicated with the first oil collecting port (21) and the first oil collecting hole (121). The two ends of the second oil inlet pipe (221) are respectively communicated with the second oil collecting port (22) and the second oil collecting hole (122).

8. The automatic forced lubrication system applied to the shearer swing arm according to claim 7, characterized in that: A valve plate (24) is rotatably connected in the oil collecting block (2). The valve plate (24) is connected to the valve core (5). When the valve core (5) rotates to make the first oil delivery hole (52) communicate with the first oil outlet (42), the valve plate (24) rotates to close the communication between the first oil collecting port (21) and the conveying port (23). When the valve core (5) rotates to make the second oil delivery hole (53) communicate with the second oil outlet (43), the valve plate (24) rotates to close the communication between the second oil collecting port (22) and the conveying port (23). When the third oil delivery hole (54) communicates with the oil return port (44), both the first oil collecting port (21) and the second oil collecting port (22) communicate with the conveying port (23).

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