A manual grease injection device for a coal mining machine

Abstract

The application relates to a manual grease injection device of a coal mining machine, which comprises a cylinder assembly in a cylindrical shape, the cylinder assembly is detachably connected to a machine body of the coal mining machine, both ends of the cylinder assembly are connected with end covers, a grease injection assembly is further arranged in the cylinder assembly, the grease injection assembly comprises a piston, a long bolt and a joint assembly I, the piston is slidably connected to a position between the two end covers in the cylinder assembly, the piston can slide along the axial direction of the cylinder assembly, the piston is arranged on the inner circumferential wall of the cylinder assembly, the long bolt and the joint assembly I can be detachably connected to the two end covers, the long bolt can be inserted into the cylinder assembly to drive the piston to move, the joint assembly I is connected with a rubber pipe, and the rubber pipe is connected with the cylinder assembly in communication through the joint assembly I. The application has the effect that the coal mining machine walking box bearing is lubricated simply and conveniently.

Description

Technical Field

[0001] This application relates to the field of mining machinery, and in particular to a manual grease injection device for a coal mining machine. Background Technology

[0002] Lubricating grease is a thick, oily, semi-solid substance. It is used in the friction parts of machinery to lubricate and seal. The working principle of lubricating grease is that a thickener holds the oil at the location requiring lubrication; under load, the thickener releases the oil, thus achieving lubrication. The traction of a coal mining machine is achieved through gear transmission in the traveling gearbox. Since the traveling gearbox is an open housing, it cannot store gear oil; therefore, bearing lubrication in the gear transmission is achieved by adding lithium-based grease.

[0003] The existing grease injection method involves workers carrying a special grease gun down into the well to apply grease to the travel box bearing. Although practical, this method requires carrying the special grease injection tool each time, making the operation cumbersome. Furthermore, the complex and confined working environment downhole makes it difficult to deploy the grease gun, causing inconvenience to maintenance personnel. Summary of the Invention

[0004] In order to provide a simple, convenient, and low-cost method for lubricating the bearings of the coal mining machine's traveling box, thereby effectively improving the operator's work efficiency, this application provides a manual grease injection device for a coal mining machine.

[0005] The manual grease injection device for a coal mining machine provided in this application adopts the following technical solution:

[0006] A manual grease injection device for a coal mining machine includes: a cylindrical cylinder assembly detachably connected to the coal mining machine body; end caps connected to both ends of the cylinder assembly; a grease injection assembly inside the cylinder assembly, the grease injection assembly including a piston, a long bolt, and a connector assembly; the piston is slidably connected to the cylinder assembly between the two end caps, the piston can slide along the axial direction of the cylinder assembly, the piston covers the inner peripheral wall of the cylinder assembly; the long bolt and the connector assembly are detachably connected to the two end caps; the long bolt can extend into the cylinder assembly to drive the piston to move; the connector assembly is connected to a hose, the hose being connected to the cylinder assembly through the connector assembly.

[0007] By adopting the above technical solution, the user places grease into the cylinder assembly, then installs connector assembly one onto the end cap on the piston side near the grease. Next, the user installs a long bolt onto the other end cap, extending through the end cap into the cylinder assembly. The long bolt then pushes the piston towards connector assembly one, causing the piston to push the grease through connector assembly one into the hose and then into the traveling bearing of the coal mining machine, thus lubricating the traveling bearing. When the piston is pushed by the long bolt against the end cap with connector assembly one, the user removes the long bolt and adds grease to the side of the piston away from connector assembly one. The user then removes connector assembly one and installs it onto the other end cap, repeating the above operation to continue injecting grease into the traveling bearing of the coal mining machine. The user does not need to return the piston to its original position; by simply swapping the positions of the long bolt and connector assembly one, it is convenient and quick to add grease into the coal mining machine.

[0008] Optionally, the end of the hose furthest from the first connector assembly is connected to a second connector assembly. The second connector assembly is connected to the first connector assembly via the hose. The cross-sectional area of ​​the second connector assembly furthest from the hose is smaller than the cross-sectional area of ​​the second connector assembly closest to the hose. The second connector assembly is threadedly connected to a rotating rod. The length of the rotating rod is arranged radially along the second connector assembly. A baffle is fixedly connected to the rotating rod at a position corresponding to the inner peripheral wall of the second connector assembly. The baffle can rotate around the rotating rod and can cover the inner peripheral wall of the second connector assembly.

[0009] By adopting the above technical solution, when the user uses the device, the user rotates the rotating rod, which causes the baffle to rotate inside the connector assembly two. The rotation of the baffle changes the area of ​​the baffle covering the inner peripheral wall of the connector assembly two, thereby adjusting the discharge speed of the grease and making it convenient for the user to adjust the discharge amount of the grease.

[0010] Optionally, the cylinder assembly has a round cap threadedly connected to each end cap position on its outer peripheral wall. Each round cap abuts against the corresponding end cap, and a round nut is fitted on each round cap at a position close to each other. Each round nut is threadedly connected to the outer peripheral wall of the cylinder assembly.

[0011] By adopting the above technical solution, when using the cylinder assembly, the user connects the two round caps to the two ends of the cylinder assembly by thread. The two round caps press the two end caps against the two ends of the cylinder assembly, thereby fixing the two end caps to the two ends of the cylinder assembly. Then, the user tightens the two round nuts, which press the two round caps against the outer circumferential wall of the cylinder assembly, further fixing the round caps and end caps to the two ends of the cylinder assembly, improving the stability of the end cap fixing and preventing slippage and loosening.

[0012] Optionally, an annular groove is provided on the outer side of the piston, the groove is set along the outer contour of the piston, and a Gladius ring is engaged in the groove of the piston, the outer peripheral wall of the Gladius ring is set to abut against the inner peripheral wall of the cylinder assembly.

[0013] By adopting the above technical solution, when the user uses the piston, a Glyd ring is engaged in the groove. The outer peripheral wall of the Glyd ring abuts against the inner peripheral wall of the cylinder assembly, thereby enabling the Glyd ring to further seal the gap between the piston and the cylinder assembly. During the process of the piston pushing the grease to move, the grease is prevented from overflowing to the other side of the piston through the gap between the piston and the cylinder assembly, so that the grease can be pushed into the connector assembly by the piston.

[0014] Optionally, the long bolt has graduations marked on its surface, and the length of the long bolt is greater than the length of the cylinder assembly.

[0015] By adopting the above technical solution, when the user uses the device, the user rotates the long bolt to extend it into the cylinder assembly. The scale on the surface of the long bolt allows the user to adjust the volume of grease dispensed according to the scale while using the long bolt to push the piston, making it convenient for the user to use.

[0016] Optionally, the grease injection assembly further includes a grease injection connector, which can be detachably connected to the cylinder assembly. The grease injection connector can be located on the side of the piston away from the connector assembly. A grease injection funnel is connected to the grease injection connector away from the connector assembly, and the grease injection funnel can be connected to the cylinder assembly through the grease injection connector.

[0017] By adopting the above technical solution, when using the product, the user can pour the grease into the grease funnel, and the grease will enter the grease injection connector through the grease funnel, and then enter the cylinder assembly through the grease injection connector, making it convenient for the user to add grease to the cylinder assembly.

[0018] Optionally, the outer peripheral wall of the cylinder assembly is provided with a fixing component, which includes a connecting block, a connecting plate and a connecting bolt. The connecting block is fixed to the outer peripheral wall of the cylinder assembly, and the connecting bolt is threaded to the connecting block and the connecting plate. The connecting block and the connecting plate are connected by the connecting bolt. The connecting plate is threaded with a plurality of fixing screws, and the connecting plate is connected to the coal mining machine body by the fixing screws.

[0019] By adopting the above technical solution, when using the machine, the user fixes the connecting plate to the body of the coal mining machine with multiple fixing screws, and then connects the connecting plate and the connecting block together with connecting bolts, thereby installing the manual grease injection device on the body of the coal mining machine. This eliminates the need for the user to carry the grease injection gun each time they go down the mine, saving underground space and making it more convenient for the user to operate.

[0020] Optionally, each of the end caps is provided with an annular groove at its position within the cylinder assembly. The annular groove is set along the contour of the end cap, and an O-ring and a retaining ring can be detachably connected in the annular groove of each end cap.

[0021] By adopting the above technical solution, when the user uses it, the O-ring and retaining ring play the role of sealing the gap between the end cover and the cylinder assembly, preventing the grease from coming out of the gap between the end cover and the cylinder assembly when the piston pushes the grease, thus improving the sealing performance of the manual grease injection device and preventing grease from overflowing.

[0022] Optionally, the top of the connecting block is fixed with multiple locking blocks, and the connecting plate has multiple locking slots on the side near the connecting block, so that the multiple locking blocks can be respectively locked into the multiple locking slots of the connecting plate.

[0023] By adopting the above technical solution, when using the device, the user will respectively engage multiple locking blocks of the connecting block into multiple slots of the connecting plate, and then connect the connecting block and the connecting plate together with connecting bolts. The locking blocks engaging into the slots of the connecting plate can further improve the stability of the connection between the connecting block and the connecting plate, and reduce the impact of vibration caused by the frequent operation of the coal mining machine, which can cause the connecting bolts between the connecting block and the connecting plate to become misaligned due to vibration, resulting in gaps between the connecting block and the connecting plate and affecting the stability of the manual grease injection device.

[0024] Optionally, each of the end caps is hinged with a baffle, which can cover the connection position between the grease injection connector and the corresponding end cap. The baffle is located on one side of the two end caps that are close to each other. Each baffle and the corresponding end cap are connected by a torsion spring, which applies a force to the baffle to make it stick to the end cap.

[0025] By adopting the above technical solution, during use, the baffle is pressed tightly against the end cap by the elastic force of the torsion spring. The baffle seals the connection between the grease injection connector and the end cap. When needed, the user installs the grease injection connector on the end cap, which extends into the end cap, thus lifting the baffle and connecting the grease injection connector to the cylinder assembly. After use, the user removes the grease injection connector. The baffle, pressed tightly against the end cap by the torsion spring, seals the connection between the grease injection connector and the end cap, thus preventing dust from entering the grease injection device when it is not in use and affecting its operation.

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

[0027] 1. The design of the cylinder assembly, end cap, long bolt, piston, connector assembly one, hose, connector assembly two, round cap, round nut, scale, connecting block, connecting plate, connecting bolt, and fixing screw allows users to install the manual grease injection device onto the coal mining machine body, eliminating the need to carry a grease injection gun every time they go down the mine. Simultaneously, users can insert the long bolt into the cylinder assembly to push the piston, thereby pushing grease into connector assembly one, hose, and connector assembly two, thus injecting grease into the coal mining machine's traveling bearings. Users do not need to reset the piston; they only need to swap the positions of the long bolt and connector assembly one to continue injecting grease into the coal mining machine. This design is convenient and quick for users.

[0028] 2. The design of the piston, groove, Glyd ring, end cap, annular groove, O-ring, and baffle: The Glyd ring and groove can seal the gap between the piston and the cylinder assembly, preventing grease from overflowing to the other side of the piston and affecting the injection of grease into the coal mining machine. At the same time, the annular groove, O-ring, and baffle can seal the gap between the end cap and the cylinder assembly, preventing grease from overflowing from the gap between the cylinder assembly and the end cap during the process of the piston pushing grease from the cylinder assembly into the joint assembly.

[0029] 3. The design of the baffle, torsion spring, end cap, grease injection connector, and grease injection funnel: The baffle and torsion spring can seal the connection between the grease injection connector and the end cap, preventing dust from entering the grease injection device through this connection when not in use and affecting user operation. At the same time, the grease injection connector and grease injection funnel allow users to easily add grease to the steel grease injection device through the grease injection funnel, making it convenient for users. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0031] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this application;

[0032] Figure 3 yes Figure 2 Enlarged view of section A;

[0033] Figure 4 yes Figure 2 Enlarged view of section B;

[0034] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0035] Figure 6 This is a cross-sectional view of the overall structure of Embodiment 2 of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Cylinder assembly; 2. Fixing assembly; 21. Connecting block; 22. Connecting plate; 23. Connecting bolt; 24. Locking block; 25. Locking groove; 26. Fixing screw; 27. Spring washer; 3. End cap; 31. Threaded hole; 32. Baffle; 33. Torsion spring; 34. Ring groove; 341. O-ring; 342. Retaining ring; 35. Round cap; 36. Round nut; 37. Through port; 38. Extension ring; 4. Grease injection assembly; 41. Piston; 42. Long bolt; 421. Scale; 43. Connector assembly one; 44. Rubber hose; 45. Connector assembly two; 46. Groove; 47. Glyd ring; 48. Rotating rod; 49. Baffle; 5. Grease injection connector; 51. Grease injection funnel. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0038] Reference Figure 1-4 Embodiment 1 of this application discloses a manual grease injection device for a coal mining machine.

[0039] Reference Figure 1 and Figure 2 A manual grease injection device for a coal mining machine includes a cylindrical cylinder assembly 1. A fixing component 2 is provided on the outer peripheral wall of the cylinder assembly 1. The fixing component 2 includes a connecting block 21, a connecting plate 22, and connecting bolts 23. The connecting block 21 is fixedly connected to the cylinder assembly 1 near its center along its axial direction and to the outer peripheral wall of the cylinder assembly 1. Multiple locking blocks 24, V-shaped, are fixedly attached to the top of the connecting block 21, with their length direction perpendicular to the axial direction of the cylinder assembly 1. Multiple slots 25 are formed at the bottom of the connecting plate 22, and the locking blocks 24 of the connecting block 21 can respectively engage with the slots 25 at the bottom of the connecting plate 22. The connecting bolts 23 pass through the connecting plate 22 and are threadedly connected to the connecting block 21 and the connecting plate 22. The cross-sectional area of ​​the connecting plate 22 is larger than that of the connecting block 21, and the connecting plate 22 and the connecting block 21 are connected together by the connecting bolts 23. The connecting plate 22 is threaded with fixing screws 26 at its four corners. Each fixing screw 26 is fitted with a spring washer 27. The spring washer 27 can abut against the bottom of the connecting plate 22. The connecting plate 22 is installed on the body of the coal mining machine by the four fixing screws 26.

[0040] Reference Figures 1-3Both ends of the cylinder assembly 1 are provided with end caps 3. The end caps 3 abut against the two ends of the cylinder assembly 1 and cover the inner contour of the cylinder assembly 1. The cross-sectional area of ​​the end caps 3 is not greater than the cross-sectional area of ​​the cylinder assembly 1. Each end cap 3 has a threaded hole 31 at its middle position. The axial direction of the threaded hole 31 is along the axial direction of the cylinder assembly 1 and the threaded hole 31 passes through the end cap 3. Each end cap 3 has a baffle 32 hinged at its threaded hole 31. The baffle 32 is located on the side of the two end caps 3 that are close to each other. The baffle 32 covers the threaded hole 31 of the corresponding end cap 3 and is located in a groove inside the side of the two end caps 3 that are close to each other. Each baffle 32 and the corresponding end cap 3 are fixedly connected to a torsion spring 33. The torsion spring 33 applies a force to the baffle 32 to make the baffle 32 stick to the side wall of the end cap 3.

[0041] Reference Figure 2 and Figure 4 Each end cap 3 has an annular groove 34 at its insertion point into the cylinder assembly 1. The annular groove 34 is set along the contour of the end cap 3. An elastic O-ring 341 is engaged in the annular groove 34 of each end cap 3, and the O-ring 341 is able to abut against the inner peripheral wall of the cylinder assembly 1. At the position of each end cap 3 corresponding to two O-rings 341 on opposite sides of the annular groove 34, a retaining ring 342 is engaged. The retaining ring 342 abuts against the corresponding O-ring 341 and covers the gap between the end cap 3 and the cylinder assembly 1.

[0042] Reference Figure 1 and Figure 2 Each cylinder assembly 1 has a round cap 35 threadedly connected to both ends along its axial direction. Each round cap 35 abuts against a corresponding end cap 3, pressing the end cap 3 against both ends of the cylinder assembly 1. Each round cap 35 has a through-hole 37 at the location of the threaded hole 31 of the corresponding end cap 3, and the through-hole 37 of the round cap 35 communicates with the threaded hole 31 of the corresponding end cap 3. Each round cap 35 has an extension ring 38 fixedly connected near the connecting block 21. The extension ring 38 is set along the contour of the round cap 35 and can be threadedly connected to the outer peripheral wall of the cylinder assembly 1. A round nut 36 is threadedly connected to the outer peripheral wall of the cylinder assembly 1 near each round cap 35. The round nut 36 abuts against the outside of the extension ring 38, pressing the corresponding extension ring 38 against the outer peripheral wall of the cylinder assembly 1, thereby further fixing the round cap 35 to the cylinder assembly 1.

[0043] Reference Figure 1 and Figure 2The cylinder assembly 1 is equipped with a grease injection assembly 4, which includes a piston 41, a long bolt 42, a connector assembly 43, a hose 44, and a connector assembly 45. The piston 41 is slidably connected to the inner circumferential wall of the cylinder assembly 1, and covers the inner contour of the cylinder assembly 1. The piston 41 can slide along the axial direction of the cylinder assembly 1. A groove 46 is formed on the side wall of the piston 41, which surrounds the contour of the piston 41. A Gladstone ring 47 is engaged in the groove 46 of the piston 41, and the Gladstone ring 47 can abut against the inner circumferential wall of the cylinder assembly 1. The long bolt 42 can be threaded into the threaded hole 31 of the end cap 3. The long bolt 42 passes through the threaded hole 31 of the end cap 3 and extends into the cylinder assembly 1. The long bolt 42 can abut against the piston 41 and push the piston 41 to slide within the cylinder assembly 1. The side wall of the long bolt 42 is marked with a scale 421, and the length of the long bolt 42 is greater than the length of the cylinder assembly 1. Connector assembly 43 is threaded into the threaded hole 31 of the other end cap 3. Connector assembly 43 is connected to cylinder assembly 1. The length of connector assembly 43 is greater than the length of the threaded hole 31 of end cap 3. Rubber hose 44 is fixedly connected to the end of connector assembly 43 away from piston 41. Rubber hose 44 is connected to connector assembly 43. Connector assembly 45 is fixedly connected to the end of rubber hose 44 away from connector assembly 43. Connector assembly 45 is connected to rubber hose 44. The inner peripheral wall of the second connector assembly 45 is truncated cone-shaped. The cross-sectional area of ​​the second connector assembly 45 away from the hose 44 is smaller than the cross-sectional area of ​​the second connector assembly 45 near the hose 44. A rotating rod 48 is rotatably connected to the second connector assembly 45 away from the hose 44. The rotating rod 48 passes through the side wall of the second connector assembly 45. The length direction of the rotating rod 48 is arranged along the radial direction of the second connector assembly 45. A baffle 49 is fixedly connected to the rotating rod 48 at the position corresponding to the inner peripheral wall of the second connector assembly 45. The rotating rod 48 can drive the baffle 49 to rotate inside the second connector assembly 45. The baffle 49 can cover the inner side wall of the second connector assembly 45.

[0044] The implementation principle of Embodiment 1 of this application is as follows: When in use, the user fixes the connecting plate 22 to the body of the coal mining machine using four fixing screws 26, and makes four spring washers 27 respectively abut against the connecting plate 22 and the body of the coal mining machine to reduce the vibration of the coal mining machine transmitted to the grease injection device, so that the connecting plate 22 abuts against the body of the coal mining machine, thereby installing the manual grease injection device onto the body of the coal mining machine. Multiple V-shaped locking blocks 24 on the top of the connecting block 21 are respectively engaged in multiple slots 25 of the connecting block 21. The length direction of the V-shaped locking blocks 24 is arranged perpendicular to the axial direction of the cylinder assembly 1, and the connecting block 21 and the connecting plate 22 are fixed together by connecting bolts 23, thereby firmly locking the multiple locking blocks 24 into the multiple slots 25 of the connecting plate 22, thereby further firmly fixing the connecting block 21 and the connecting plate 22 together, preventing the connecting block 21 from moving along the cylinder axial direction. Two round caps 35 press the two end caps 3 against the two ends of the cylinder assembly 1, thus fixing the two end caps 3 to the two ends of the cylinder assembly 1 and serving to secure the end caps 3. Two round nuts 36 are respectively fitted onto the extension ring positions of the two round caps 35, pressing the extension rings of the two round caps 35 against the outer peripheral wall of the cylinder assembly 1, thus pressing the two round caps 35 against the two ends of the cylinder assembly 1. The round caps 35 and round nuts 36 form a "double nut" structure to provide a fastening effect, thereby firmly installing the two end caps 3 to the two ends of the cylinder assembly 1. The annular groove 34 opened in each end cap 3 and the elastic O-ring 341 in the annular groove 34 can seal the contact position between the end cap 3 and the cylinder assembly 1, preventing the grease in the grease injection device from seeping out through the contact position between the end cap 3 and the cylinder assembly 1. The retaining ring 342 further seals the connection between the end cap 3 and the cylinder assembly 1, preventing the O-ring 341 from wearing due to the rotation of the end cap 3. The groove 46 on the piston 41 and the Glyd ring 47 within the groove 46 can fully push the grease to move, thereby preventing the grease from seeping into the chamber on the other side from the gap between the piston 41 and the cylinder assembly 1.

[0045] The user then threads the connector assembly 43 and the long bolt 42 into the threaded holes 31 of the two end caps 3, respectively. The connector assembly 43 and the long bolt 42 push open the baffle 32, allowing them to extend into the cylinder assembly 1. After use, the baffle 32, under the action of the torsion spring 33, adheres tightly to the end cap 3, thus providing a sealing and dustproof function and preventing residual grease from overflowing from the cylinder assembly 1. The user rotates the long bolt 42 to extend it into the cylinder assembly 1, causing it to abut against the piston 41. The long bolt 42 continues to extend into the cylinder assembly 1, pushing the piston 41 to slide along the inner circumferential wall of the cylinder assembly 1 until the piston 41 abuts against the end cap 3 connected to the connector assembly 43. At this point, the user rotates the round nut 36 and the round cap 35 near the long bolt 42 to remove the round nut 36, round cap 35, end cap 3, and long bolt 42. The user then adds grease into the cylinder assembly 1 from this end. Afterwards, the user reinstalls the end cap 3, round cap 35, and round nut 36. The user removes the connector assembly 43 from the other end and installs it into the threaded hole 31 of the end cap 3 at this end. The user then threads the long bolt 42 into the threaded hole 31 of the end cap 3 where the connector assembly 43 was originally installed. The user rotates the long bolt 42 to extend it into the cylinder assembly 1, thereby pushing the piston 41 from one end cap 3 position to the other end cap 3 position, thus squeezing grease into the connector assembly 43 and along the hose 44 and connector assembly 45 to the traveling bearing position of the coal mining machine to lubricate the bearing. The scale 421 marked on the long bolt 42 allows the user to easily observe the amount of grease injected. During this process, the user can rotate the rotating rod 48 to adjust the area of ​​the baffle 49 covering the second joint assembly 45, thereby adjusting the grease extrusion speed. After the piston 41 is pushed by the long bolt 42 to abut against the end cap 3 at the other end, the user can repeat the above operation to add grease into the cylinder assembly 1 and continue to add grease into the coal mining machine with minimal effort. The user's operation is labor-saving, convenient and quick.

[0046] Reference Figure 5 and Figure 6 Embodiment 2 of this application discloses a manual grease injection device for a coal mining machine, which differs from Embodiment 1 in that:

[0047] Reference Figure 5 and Figure 6A long bolt 42 is rotatably connected to two end caps 3 near both ends. The length of the long bolt 42 is along the axial direction of the cylinder. The long bolt 42 passes through the piston 41, which is threaded onto the outside of the long bolt 42. Both ends of the long bolt 42 pass through the two end caps 3. A scale 421 is marked on one end of the long bolt 42, and the scale 421 is set around the outer contour of one end of the long bolt 42. The grease injection assembly 4 also includes a grease injection connector 5. The grease injection connector 5 and connector assembly 43 are threaded into the threaded holes 31 of the two end caps 3, respectively. Both the grease injection connector 5 and connector assembly 43 are connected to the cylinder assembly 1. A grease injection funnel 51 is fixedly connected to the grease injection connector 5 at a position away from the piston 41. The cross-sectional area of ​​the grease injection funnel 51 at the position away from the grease injection connector 5 is larger than the cross-sectional area near the grease injection connector 5. The grease injection funnel 51 is connected to the grease injection connector 5.

[0048] The implementation principle of Embodiment 2 of this application is as follows: When in use, the user adds grease to the cylinder assembly 1 through the grease funnel 51. The grease is poured into the grease funnel 51 and flows along the funnel 51 into the grease injection connector 5. Then, it enters the cylinder assembly 1 through the threaded hole 31 of the end cap 3 from the grease injection connector 5. The user then removes the grease injection connector 5 and installs it into the threaded hole 31 of the end cap 3 on the other side of the piston 41. Then, the user threads the connector assembly 43 into the threaded hole 31 of the end cap 3 on that side. The user rotates the long bolt 42, causing the long bolt 42 to drive the piston 41 to slide towards the connector assembly 43 within the cylinder assembly 1. This pushes the grease from the connector assembly 43 into the hose 44, and then from the hose 44 into the connector assembly 45, injecting it into the traveling bearing position of the coal mining machine, thus lubricating the traveling bearing. After the injected grease is used up, the user swaps the positions of the grease injection connector 5 and connector assembly 43. The user can then repeat the above operation to add grease to the grease injection device. Compared with Embodiment 1, where the user only needs to swap the positions of the grease injection connector 5 and connector assembly 43, the installation and use are quicker and more convenient.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A manual grease injection device for a coal mining machine, comprising: A cylindrical cylinder assembly (1) is characterized in that: the cylinder assembly (1) is detachably connected to the body of a coal mining machine; both ends of the cylinder assembly (1) are connected to end caps (3); a grease injection assembly (4) is also provided inside the cylinder assembly (1), the grease injection assembly (4) including a piston (41), a long bolt (42) and a connector assembly (43), the piston (41) being slidably connected inside the cylinder assembly (1) at a position corresponding to the two end caps (3), the piston (41) being slidably connected to ... 41) It can slide along the axial direction of the cylinder assembly (1). The piston (41) is provided to cover the inner peripheral wall of the cylinder assembly (1). The long bolt (42) and the first connector assembly (43) can be detachably connected to the two end caps (3). The long bolt (42) can extend into the cylinder assembly (1) to drive the piston (41) to move. The first connector assembly (43) is connected to a rubber tube (44). The rubber tube (44) is connected to the cylinder assembly (1) through the first connector assembly (43). The grease injection assembly (4) also includes a grease injection connector (5), which can be detachably connected to the cylinder assembly (1). The grease injection connector (5) is located on the side of the piston (41) away from the connector assembly (43). A grease injection funnel (51) is connected to the grease injection connector (5) away from the connector assembly (43). The grease injection funnel (51) can be connected to the cylinder assembly (1) through the grease injection connector (5). Each of the end caps (3) is hinged with a baffle (32). The baffle (32) can cover the connection position between the grease injection connector (5) and the corresponding end cap (3). The baffle (32) is located on the side where the two end caps (3) are close to each other. Each baffle (32) and the corresponding end cap (3) are connected by a torsion spring (33). The torsion spring (33) applies a force to the baffle (32) to make it stick to the end cap (3). The cylinder assembly (1) has a round cover (35) threadedly connected to each end cover (3) at the corresponding position on the outer peripheral wall. Each round cover (35) abuts against the corresponding end cover (3). Each round cover (35) is fitted with a round nut (36) at the position close to each other. Each round nut (36) is threadedly connected to the outer peripheral wall of the cylinder assembly (1). When the piston (41) is pushed by the long bolt (42) to the end cap (3) on which the first joint assembly (43) is installed, the long bolt (42) is removed, and grease is added to the side of the piston (41) away from the first joint assembly (43). Then the first joint assembly (43) is removed and installed on another end cap (3). The above operation is repeated to continue to inject the grease into the traveling bearing of the coal mining machine. There is no need to return the piston (41) to its original position. The positions of the long bolt (42) and the first joint assembly (43) can be interchanged to facilitate the addition of grease into the coal mining machine.

2. The manual grease injection device for a coal mining machine according to claim 1, characterized in that: The end of the hose (44) away from the first connector assembly (43) is connected to the second connector assembly (45). The second connector assembly (45) is connected to the first connector assembly (43) through the hose (44). The cross-sectional area of ​​the second connector assembly (45) away from the hose (44) is smaller than the cross-sectional area of ​​the second connector assembly (45) near the hose (44). The second connector assembly (45) is threadedly connected to a rotating rod (48). The length direction of the rotating rod (48) is arranged radially along the second connector assembly (45). A baffle (49) is fixedly connected to the rotating rod (48) at the position corresponding to the inner peripheral wall of the second connector assembly (45). The baffle (49) can rotate around the rotating rod (48) and can cover the inner peripheral wall of the second connector assembly (45).

3. The manual grease injection device for a coal mining machine according to claim 1, characterized in that: The piston (41) has an annular groove (46) on its outer side. The groove (46) is arranged along the outer contour of the piston (41). A glyph (47) is engaged in the groove (46) of the piston (41). The outer peripheral wall of the glyph (47) abuts against the inner peripheral wall of the cylinder assembly (1).

4. The manual grease injection device for a coal mining machine according to claim 1, characterized in that: The long bolt (42) has a scale (421) marked on its surface, and the length of the long bolt (42) is greater than the length of the cylinder assembly (1).

5. The manual grease injection device for a coal mining machine according to claim 1, characterized in that: The cylinder assembly (1) is provided with a fixing component (2) on its outer peripheral wall. The fixing component (2) includes a connecting block (21), a connecting plate (22), and a connecting bolt (23). The connecting block (21) is fixed to the outer peripheral wall of the cylinder assembly (1). The connecting bolt (23) is threaded to the connecting block (21) and the connecting plate (22). The connecting block (21) and the connecting plate (22) are connected by the connecting bolt (23). The connecting plate (22) is threaded with a plurality of fixing screws (26). The connecting plate (22) is connected to the coal mining machine body by the fixing screws (26).

6. The manual grease injection device for a coal mining machine according to claim 1, characterized in that: Each end cap (3) is provided with an annular groove (34) at the position inside the cylinder assembly (1). The annular groove (34) is provided along the contour of the end cap (3). An O-ring (341) and a retaining ring (342) can be detachably connected in the annular groove (34) of each end cap (3).

7. A manual grease injection device for a coal mining machine according to claim 5, characterized in that: The top of the connecting block (21) is fixed with multiple locking blocks (24), and the connecting plate (22) has multiple slots (25) on the side near the connecting block (21). The multiple locking blocks (24) can be respectively locked into the multiple slots (25) of the connecting plate (22).

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