Oil self-adaptive reversing device, lubricating system and rocker arm of coal mining machine

Abstract

The utility model discloses an oil liquid self-adaptation reversing device, lubrication system and coal mining machine rocker arm, the rocker arm is provided with a hollow cavity, a plurality of gear bearings are arranged in the cavity, the cavity is filled with lubricating liquid used for lubricating the gear bearings, the reversing device comprises two inlet ends which are respectively communicated with the two end portions of the bottom wall of the cavity from the outside, and the two inlet ends are communicated with the oil liquid. Therefore, when the rocker arm swings, lubricating liquid is conveyed to the top face of the cavity from the oil liquid concentration area of the cavity so as to lubricate all the gear bearings. The two inlet ends of the oil liquid self-adaption reversing device are communicated with the two end portions of the bottom wall of the cavity correspondingly, so that when the rocker arm swings, lubricating liquid can be obtained from oil liquid concentration areas in the two end portions of the cavity, and the lubricating liquid is conveyed to the top face of the cavity and enters the cavity; the conveyed lubricating liquid is conveyed towards all the gear bearings, so that all the gear bearings are lubricated, the service life of the rocker arm transmission system is prolonged, and the reliability of the rocker arm transmission system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mining machines, and specifically relates to an oil self-adaptive reversing device, a lubrication system comprising the oil self-adaptive reversing device, and a coal mining machine rocker arm. Background Art

[0002] Coal mining machine is a widely used coal mining device. The rocker arm of the coal mining machine is often in a swinging position at different angles to mine coal seams of different thicknesses. When the rocker arm swings upward to mine the upper coal layer, the oil in the rocker arm cavity is concentrated in the high-speed area, making it impossible to lubricate the low-speed gear bearing; when the rocker arm swings downward to mine the lower coal layer, the oil is concentrated in the low-speed area, making it impossible to lubricate the high-speed gear bearing. Due to insufficient lubrication of the gear bearing, the life and reliability of the transmission system will be greatly reduced. In severe cases, the entire rocker arm transmission system will be damaged, reducing product quality and affecting the production of the mine. Utility Model Content

[0003] The utility model is developed to solve the above-mentioned problems, and aims to provide an oil adaptive reversing device and a coal mining machine rocker arm, which solves the problem of uneven lubrication of gear bearings when the coal mining machine rocker arm swings to different angles in the prior art, and effectively improves the life and reliability of the rocker arm transmission system.

[0004] The utility model provides an oil self-adaptive reversing device, which is arranged on a rocker arm of a coal mining machine. The rocker arm has a hollow cavity, in which a plurality of gear bearings are arranged and filled with lubricating liquid for lubricating the gear bearings.

[0005] The oil adaptive reversing device includes two inlet ends, and is respectively connected to the two end positions of the bottom wall of the cavity from the outside, so that when the rocker arm swings, the lubricating liquid is transported from the oil concentration area of ​​the cavity to the top surface of the cavity to lubricate all the gear bearings.

[0006] Preferably, the oil adaptive reversing device comprises:

[0007] A reversing block, internally formed with a first oil channel and a second oil channel sharing the same outlet, wherein the first oil channel is connected to an oil concentration area when the rocker arm is swung upward, and the second oil channel is connected to an oil concentration area when the rocker arm is swung downward; and

[0008] The valve core is slidably disposed in the reversing block and is used to open or close the first oil channel or the second oil channel according to the tilt angle of the rocker arm.

[0009] Preferably, a sliding cavity is formed in the area between the first oil channel and the second oil channel, and the valve core is movably disposed in the sliding cavity.

[0010] The first oil channel and the second oil channel are connected at the two end surfaces of the sliding chamber along the moving direction of the valve core, and the first oil suction port and the second oil suction port are respectively arranged at the two ends of the side wall of the sliding chamber along the sliding direction. The first oil suction port is arranged close to the first oil channel, and the second oil suction port is arranged close to the second oil channel.

[0011] Preferably, the length of the sliding cavity is matched with the length of the valve core.

[0012] Conical surfaces are respectively provided at both ends of the valve core, and the end size of the conical surface is smaller than the size of the pipe openings of the first oil channel and the second oil channel, so that the valve core can slide back and forth, thereby sealingly matching with the pipe openings of the first oil channel or the second oil channel respectively.

[0013] Preferably, a plurality of annular grooves are circumferentially arranged in the middle area of ​​the valve core for containing oil.

[0014] Preferably, one end of the sliding cavity is a detachable threaded component, and a flow pipe is arranged inside the threaded component to form a part of the first oil channel, and is connected with the sliding cavity for oil intake.

[0015] Preferably, a sealing ring is circumferentially sleeved on the inner side of the nut of the threaded member for sealing.

[0016] Preferably, the top surface of the commutation block forms a mounting surface, and threaded through holes are respectively provided at the end angle positions thereof so as to be fixedly connected to the rocker arm via threaded members.

[0017] Secondly, the utility model also provides a lubrication system, which is applied to a rocker arm of a coal mining machine, wherein the rocker arm has a hollow cavity, wherein a plurality of gear bearings are arranged in the cavity and filled with a lubricating fluid for lubricating the gear bearings, and the lubrication system comprises:

[0018] A plurality of oil inlets are arranged on the top wall of the cavity of the rocker arm and are sequentially arranged along the length direction thereof, and the plurality of oil inlets are respectively arranged corresponding to the plurality of gear bearings;

[0019] A front oil outlet and a rear oil outlet provided at two end regions of the bottom wall of the cavity;

[0020] an oil suction pump disposed on the rocker arm, wherein a plurality of oil outlets of the oil suction pump are respectively connected one by one with a plurality of oil inlets of the cavity to transport lubricating liquid; and

[0021] As described in the above scheme, the oil adaptive reversing device is arranged on the rocker arm of the coal mining machine, and is externally connected to the two end positions of the bottom wall of the cavity, so that when the rocker arm swings, the lubricating liquid is transported from the oil concentration area of ​​the cavity to the top surface of the cavity to lubricate all the gear bearings.

[0022] In addition, the utility model also provides a rocker arm of a coal mining machine, comprising the oil adaptive reversing device described in the above scheme or the lubrication system described in the above scheme.

[0023] According to the oil adaptive reversing device involved in the utility model, the oil adaptive reversing device is fixed on the rocker arm of the coal mining machine from the outside, and its two inlet ends are respectively connected to the two end positions of the bottom wall of the cavity, so that when the rocker arm swings, lubricating liquid can be obtained from the oil concentration areas in the two ends of the cavity, and the lubricating liquid is transported to the top surface of the cavity and enters the cavity. The transported lubricating liquid is transported toward all gear bearings respectively, so that all gear bearings are lubricated, thereby improving the life and reliability of the rocker arm transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the internal structure of the rocker arm and the lubrication system in an embodiment of the utility model.

[0025] Figure 2 It is a top view of the oil adaptive reversing device in an embodiment of the utility model.

[0026] Figure 3 The oil self-adaptive reversing device in the embodiment of the utility model is Figure 1 Cross-section view along the AA direction.

[0027] Figure 4 It is a structural schematic diagram of the valve core in an embodiment of the utility model.

[0028] Figure 5 This is a distribution diagram of the lubricating fluid inside the cavity when the rocker arm is in the upward swing state in the embodiment of the utility model.

[0029] Figure 6 It is a cross-sectional view of the oil adaptive reversing device in the embodiment of the utility model as the rocker arm swings upward.

[0030] Figure 7 This is a distribution diagram of the lubricating fluid inside the cavity when the rocker arm is in a downward swinging state in an embodiment of the utility model.

[0031] Figure 8 It is a cross-sectional view of the oil adaptive reversing device in the embodiment of the utility model as the rocker arm swings downward. DETAILED DESCRIPTION

[0032] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0033] <Example>

[0034] like Figures 1 to 8 As shown, this embodiment discloses an oil adaptive reversing device 10 and a lubrication system 20, which are arranged on a rocker arm 30 of a coal mining machine, and are used to achieve uniform lubrication of the gear bearings of the transmission system inside the rocker arm 30 at different inclination angles.

[0035] like Figure 1 As shown, the rocker arm 30 of the coal mining machine has a hollow cavity 31, in which a plurality of gear bearings 32 of the transmission system are arranged and filled with lubricating fluid for lubricating the gear bearings (as shown by the black shadow in the figure). Figure 1 As shown in the example, the number of the gear bearings 32 is seven gear bearings of different sizes. In practical applications, the number of gear bearings is set according to the actual production requirements of the coal mining machine. In addition, the lubricating fluid refers to various lubricating oils commonly used in the mechanical field.

[0036] based on Figure 1 From the structure of the rocker arm 30 shown in FIG, it can be seen that if the rocker arm 30 swings up and down, the lubricating liquid will inevitably be concentrated in only a part of the cavity 31, that is, along the swing direction of the rocker arm 30, the lubricating liquid is concentrated in the lower area of ​​the cavity 31, resulting in only part of the gear bearing 32 being able to be lubricated, and the gear bearing 302 located at a high position cannot be lubricated. Figure 5 and Figure 7 Lubricant distribution shown.

[0037] Based on the above situation, the oil adaptive reversing device 10 of this embodiment is provided with two inlet ends, and is respectively connected to the two end positions of the bottom wall of the cavity 31 from the outside, so that when the rocker arm 30 swings, the lubricating liquid is transported from the oil concentration area of ​​the cavity 31 to the top surface of the cavity 31 to lubricate all the gear bearings 32.

[0038] like Figure 1 As shown, the lubrication system 20 includes: a plurality of oil inlets, a front oil outlet, a rear oil outlet, an oil suction pump 21 , a power unit 22 and an oil adaptive reversing device 10 .

[0039] A plurality of oil inlets are respectively arranged on the top wall of the cavity 31 of the rocker arm 30 and are sequentially arranged along the length direction of the cavity 31. The plurality of oil inlets are respectively arranged corresponding to the plurality of gear bearings 32, so as to provide lubricating liquid to lubricate the gear bearings 32. Here, the number of oil inlets can be increased or decreased according to actual production needs. As a specific embodiment, the oil inlet can be as follows: Figure 1 As shown by the marks B1, B2, B3, B4, B5, and B6 in the figure, there are a total of six oil inlets, which are arranged one by one in the meshing areas of two adjacent gear bearings 32, so as to lubricate the gear bearings.

[0040] The front oil outlet and the rear oil outlet are respectively arranged on the two end areas of the bottom wall of the cavity 31 for conveying lubricating liquid; the front side and the rear side are measured in the length direction of the rocker arm 30, the position away from the rotation axis is the front side, and the position close to the rotation axis is the rear side. As a specific implementation, in Figure 1 In the figure, the port marked A1 is the front oil outlet, and the port marked A2 is the rear oil outlet. In addition, the two oil outlets can also be divided according to the speed of the transmission system. For example, the front oil outlet A1 is set in the low-speed area of ​​the transmission system, and the rear oil outlet A2 is set in the high-speed area of ​​the transmission system.

[0041] The oil suction pump 21 is arranged on the rocker arm 30, and its multiple oil outlets are connected one by one with the multiple oil inlets of the cavity 31 to transport the lubricating liquid. Figure 1 As shown, the oil suction pump 21 has six oil outlets, which are respectively connected to six oil inlets B1, B2, B3, B4, B5, and B6.

[0042] The power unit 22 is connected to the oil suction pump 21 and is used to provide power to the oil suction pump 21 to transport the lubricating liquid. The specific power form may be mechanical, electrical or hydraulic.

[0043] like Figure 2 , 3 As shown in , 4 , the oil adaptive reversing device 10 includes: a reversing block 11 and a valve core 12 .

[0044] A first oil channel P1 and a second oil channel P2 sharing the same outlet are formed inside the reversing block 11. The first oil channel P1 is connected to the oil concentration area when the rocker arm 30 swings upward, and the second oil channel P2 is connected to the oil concentration area when the rocker arm swings downward. The outlet of the reversing block 11 is connected to the inlet of the oil suction pump 21.

[0045] The valve core 12 is slidably disposed in the reversing block 11 , and moves with the tilt angle of the rocker arm 30 and under the action of its own gravity, thereby opening or closing the first oil passage P1 or the second oil passage P2 .

[0046] According to the oil adaptive reversing device and lubrication system involved in this embodiment, the oil adaptive reversing device is fixed to the rocker arm of the coal mining machine from the outside, and its two inlet ends are respectively connected to the two end positions of the bottom wall of the cavity, so that when the rocker arm swings, lubricating liquid can be obtained from the oil concentration areas in the two ends of the cavity, and the lubricating liquid is transported to the top surface of the cavity and enters the cavity. The transported lubricating liquid is transported toward all gear bearings respectively, so that all gear bearings are lubricated, thereby improving the life and reliability of the rocker arm transmission system.

[0047] Another example Figure 2 As shown, a sliding cavity 13 is formed in the area between the first oil passage P1 and the second oil passage P2, and the valve core 12 is movably arranged in the sliding cavity 13. The first oil passage P1 and the second oil passage P2 are connected to the two end surfaces of the sliding cavity 13 along the moving direction of the valve core 12, and the two end areas on the side wall of the sliding cavity 13 along the sliding direction are respectively provided with a first oil suction port 14 and a second oil suction port 15, the first oil suction port 14 is arranged close to the first oil passage P1, and the second oil suction port 15 is arranged close to the second oil passage P2.

[0048] As a specific implementation, the length of the sliding cavity 13 is matched with the length of the valve core 12. Conical surfaces 121 are respectively provided at both ends of the valve core 12, and the end size of the conical surface 121 is smaller than the size of the pipe openings of the first oil channel P1 and the second oil channel P2, so that the valve core 12 can slide back and forth, thereby sealingly cooperating with the pipe openings of the first oil channel P1 or the second oil channel P2, respectively, to realize the conduction or closing of the first oil channel P1 or the second oil channel P2.

[0049] As a specific implementation, a plurality of annular grooves 122 are circumferentially arranged in the middle area of ​​the valve core 12 for containing lubricating liquid, thereby strengthening the supporting effect on the valve core 12, avoiding sliding warping or blockage, and reducing the impact of processing errors.

[0050] As a specific implementation, one end of the sliding cavity 13 is a detachable threaded member 16, a flow pipe is arranged inside the threaded member 16 to form part of the first oil channel, and the threaded member 16 is connected to the sliding cavity 13 to allow oil to flow in. Such a structural form facilitates the assembly of the valve core 12, the valve core 12 is placed in the sliding cavity 13, and then the threaded member 16 is tightened.

[0051] In addition, a sealing ring 17 is circumferentially sleeved on the inner side of the nut of the threaded member 16 to perform sealing and prevent liquid leakage between the contact portion of the threaded member 16 and the reversing block 11.

[0052] As a specific implementation, the top surface of the commutation block 11 forms a mounting surface, and threaded through holes are respectively provided at the end angle positions thereof so as to be fixedly connected to the rocker arm 30 via a threaded member 18 .

[0053] The following combination Figure 5 , Figure 6 , Figure 7 , Figure 8 , the lubricating oil circulation mode of the rocker arm 30 in different states is described:

[0054] like Figure 1 and Figure 3 As shown, when the rocker arm 30 is in a horizontal state, the lubricating liquid is evenly distributed in the cavity 31, that is, the front oil outlet A1 and the rear oil outlet A2 are both distributed with lubricating liquid, and the valve core 12 is also in a horizontal position. When the rocker arm 30 swings upward, the lubricating liquid is concentrated at the rear oil outlet A2, and the valve core 12 closes the second oil channel P2 according to the tilt angle of the rocker arm 30. In this way, the lubricating oil flows to the six oil inlets B1, B2, B3, B4, B5, and B6 of the cavity 31 through the rear oil outlet A2, the first oil channel P1, and the oil suction pump 21 in sequence, thereby achieving uniform lubrication of the seven gear bearings 32. All of them are in an open state, so that the lubricating oil can flow through the front oil outlet A1 and the second oil channel P2 or the rear oil outlet A2 and the first oil channel P1 to the six oil inlets B1, B2, B3, B4, B5, and B6 of the cavity 31 via the oil suction pump 21, thereby achieving uniform lubrication of the seven gear bearings 32.

[0055] like Figure 5 and Figure 6 As shown, when the rocker arm 30 swings upward, the lubricating fluid is concentrated at the rear oil outlet A2, and the valve core 12 closes the second oil channel P2 according to the tilt angle of the rocker arm 30. In this way, the lubricating oil flows to the six oil inlets B1, B2, B3, B4, B5, and B6 of the cavity 31 through the rear oil outlet A2, the first oil channel P1, and the oil suction pump 21 in sequence, thereby achieving uniform lubrication of the seven gear bearings 32.

[0056] like Figure 7 and Figure 8 As shown, when the rocker arm 30 swings downward, the lubricating fluid is concentrated at the front oil outlet A1, and the valve core 12 closes the first oil channel P1 according to the tilt angle of the rocker arm 30. In this way, the lubricating oil flows to the six oil inlets B1, B2, B3, B4, B5, and B6 of the cavity 31 through the front oil outlet A1, the second oil channel P2, and the oil suction pump 21 in sequence, thereby achieving uniform lubrication of the seven gear bearings 32.

[0057] In addition, this embodiment also provides a coal mining machine rocker arm, including the oil adaptive reversing device of the above scheme or the lubrication system of the above scheme.

[0058] As described above, through the oil adaptive reversing device, lubrication system and coal mining machine rocker arm of the present embodiment, the oil adaptive reversing device and the lubrication system are installed on the outside of the rocker arm of the coal mining machine, and the lubricating liquid is obtained from the oil concentration areas in the two ends of the cavity of the rocker arm, and the lubricating liquid is transported to the top surface of the cavity and enters the cavity. The transported lubricating liquid is transported to all the gear bearings respectively, so that all the gear bearings are lubricated, thereby improving the life and reliability of the rocker arm transmission system.

[0059] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An oil adaptive reversing device, arranged on a rocker arm of a coal mining machine, wherein the rocker arm has a hollow cavity, wherein a plurality of gear bearings are arranged in the cavity and filled with lubricating liquid for lubricating the gear bearings, characterized in that: The oil adaptive reversing device includes two inlet ends, and is respectively connected to the two end positions of the bottom wall of the cavity from the outside, so that when the rocker arm swings, the lubricating liquid is transported from the oil concentration area of ​​the cavity to the top surface of the cavity to lubricate all the gear bearings.

2. The oil adaptive reversing device according to claim 1, characterized in that: The oil adaptive reversing device comprises: A reversing block, internally formed with a first oil channel and a second oil channel sharing the same outlet, wherein the first oil channel is connected to an oil concentration area when the rocker arm is swung upward, and the second oil channel is connected to an oil concentration area when the rocker arm is swung downward; and The valve core is slidably disposed in the reversing block and is used to open or close the first oil channel or the second oil channel according to the tilt angle of the rocker arm.

3. The oil adaptive reversing device according to claim 2, characterized in that: A sliding cavity is formed in the area between the first oil channel and the second oil channel, and the valve core is movably disposed in the sliding cavity. The first oil channel and the second oil channel are connected at the two end surfaces of the sliding chamber along the moving direction of the valve core, and the first oil suction port and the second oil suction port are respectively arranged at the two ends of the side wall of the sliding chamber along the sliding direction. The first oil suction port is arranged close to the first oil channel, and the second oil suction port is arranged close to the second oil channel.

4. The oil adaptive reversing device according to claim 3, characterized in that: The length of the sliding cavity is set to match the length of the valve core. Conical surfaces are respectively provided at both ends of the valve core, and the end size of the conical surface is smaller than the size of the pipe openings of the first oil channel and the second oil channel, so that the valve core can slide back and forth, thereby sealingly matching with the pipe openings of the first oil channel or the second oil channel respectively.

5. The oil adaptive reversing device according to claim 2, characterized in that: A plurality of annular grooves are circumferentially arranged in the middle area of ​​the valve core for containing oil.

6. The oil adaptive reversing device according to claim 3, characterized in that: One end of the sliding cavity is a detachable threaded component, and a flow pipe is arranged inside the threaded component to form a part of the first oil channel, and is connected with the sliding cavity to allow oil to enter.

7. The oil adaptive reversing device according to claim 6, characterized in that: A sealing ring is circumferentially sleeved on the inner side of the nut of the threaded member for sealing.

8. The oil adaptive reversing device according to claim 2, characterized in that: The top surface of the commutation block forms a mounting surface, and threaded through holes are respectively provided at the end angle positions thereof so as to be fixedly connected with the rocker arm through threaded parts.

9. A lubrication system, applied to a rocker arm of a coal mining machine, wherein the rocker arm has a hollow cavity, wherein a plurality of gear bearings are arranged in the cavity and filled with a lubricating fluid for lubricating the gear bearings, wherein: The lubrication system comprises: A plurality of oil inlets are arranged on the top wall of the cavity of the rocker arm and are sequentially arranged along the length direction thereof, and the plurality of oil inlets are respectively arranged corresponding to the plurality of gear bearings; A front oil outlet and a rear oil outlet provided at two end regions of the bottom wall of the cavity; an oil suction pump disposed on the rocker arm, wherein a plurality of oil outlets of the oil suction pump are respectively connected one by one with a plurality of oil inlets of the cavity to transport lubricating liquid; and The oil adaptive reversing device as described in any one of claims 1 to 8 is arranged on the rocker arm of the coal mining machine and is externally connected to the two end positions of the bottom wall of the cavity, so that when the rocker arm swings, the lubricating liquid is transported from the oil concentration area of ​​the cavity to the top surface of the cavity to lubricate all the gear bearings.

10. A rocker arm of a coal mining machine, characterized in that: It comprises the oil adaptive reversing device according to any one of claims 1 to 8 or the lubrication system according to claim 9.

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