A gearbox oil drain device

Abstract

The present invention discloses an oil draining device for a gearbox, which comprises an oil draining mechanism, a gearbox body and a fixing seat; a first opening adapted to the fixing seat is provided at the bottom of the gearbox body, and the oil draining mechanism is arranged at the mounting hole of the fixing seat; an oil draining cover plate of the oil draining mechanism is installed on the fixing seat by bolts, a drain hole is provided in the middle of the oil draining cover plate, a plug is arranged in the drain hole, an oil draining sphere is arranged above the drain hole, and four socket head cap screws are arranged around the oil draining sphere. In the present invention, the oil draining sphere is pressed against the drain hole by oil pressure and the self-weight of the oil draining sphere to form a line seal, and the gasket of the outer plug strengthens the seal to reduce the risk of leakage; when oil needs to be drained, the plug is removed, and the oil draining steel ball is lifted by using a screw or an oil drain pipe joint, and the oil is put into a specified container. The four socket head cap screws around the oil draining steel ball form a ball cage to prevent the oil draining sphere from shifting when lifted and being unable to reset after the oil draining is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of gear oil tanks, and particularly relates to an oil draining device for a gearbox. Background Art

[0002] A housing such as a gearbox is a cavity for storing the liquid used in the system circulation. During the circulation process of the liquid used in the system, a lot of impurities will be brought in, or there will be infiltration of external substances, or the liquid will mutate due to exceeding the shelf life, and it needs to be replaced regularly.

[0003] Chinese Patent CN209262220U discloses a pitch-changing gearbox oil filling and draining device, including a gearbox, an exhaust port, a switching valve, an oil filling port, a first air pipe, a hand pump, a second air pipe, an air pump, an oil drain port, an oil outlet pipe, and a waste oil barrel; an exhaust port is provided on the side wall of the gearbox, an oil filling port is provided on the side wall of the gearbox, a switching valve is installed at the oil filling port, one interface of the switching valve communicates with one end of the first air pipe, the other end of the first air pipe communicates with the output end of the hand pump, the other interface of the switching valve communicates with one end of the second air pipe, the other end of the second air pipe is fixedly communicated with the output end of the air pump, an oil drain port is provided at the bottom end of the gearbox, the oil drain port communicates with the oil outlet pipe, and the other end of the oil outlet pipe communicates with the waste oil barrel.

[0004] The traditional operation method is to open a hole at the bottom of the tank and add a sealing cover plate. This treatment method will have several disadvantages: 1. The sealing cover plate is repeatedly disassembled during oil draining, and leakage is likely to occur; 2. The oil drain cover plate is usually fixed by more than four screws, and it is not very convenient to disassemble; 3. Liquid splashing and other dangers are likely to occur when disassembling the oil drain cover plate; 4. The traditional cover plate design method is not suitable for using an external pipeline method to drain liquid such as oil to the desired place; 5. The traditional cover plate design method cannot use the method of pumping to assist in emptying. Summary of the Invention

[0005] The object of the present invention is to solve the problems in the above background art, and propose an oil draining device for a gearbox. The oil draining ball is pressed tightly on the oil drain hole by the oil pressure and the self-weight of the oil draining ball to form a line seal, and the sealing gasket of the outer plug reinforces the seal, reducing the risk of leakage; when oil needs to be drained, the plug is removed, and the oil draining steel ball is lifted by using a screw or an oil drain pipe joint, and the oil is put into a specified container. Four hexagon socket head cap screws around the oil draining steel ball form a ball cage to prevent the oil draining ball from shifting when lifted and being unable to reset after oil draining is completed.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A gearbox oil drain device includes an oil drain mechanism, a gearbox body, and a fixing seat; a first opening adapted to the fixing seat is provided at the bottom of the gearbox body, and the oil drain mechanism is provided at the mounting hole of the fixing seat.

[0008] The oil drain cover plate of the oil drain mechanism is installed on the fixing seat by bolts. A drain hole is provided in the middle of the oil drain cover plate, a plug is provided in the drain hole, an oil drain sphere is provided above the drain hole, and four hexagon socket head cap screws are arranged in a circular array around the oil drain sphere.

[0009] As a further solution of the present invention: The fixing seat is installed on the bottom surface of the gearbox body. A convex hole is provided on the fixing seat. The oil drain hole is above the convex hole, and the mounting hole is below the convex hole.

[0010] As a further solution of the present invention: An O-ring seal is provided at the connection between the oil drain cover plate and the fixing seat. The hexagon socket head cap screws are inclined and threadedly installed on the oil drain cover plate.

[0011] As a further solution of the present invention: A filter element is sleeved on the oil drain mechanism. An elastic sleeve is provided on the inner circle of the bottom plate of the filter element, an outer cover body is provided on the top surface of the bottom plate, multiple groups of through holes are evenly provided on the surface of the outer cover body, and a filter bag is provided in the inner cavity of the outer cover body.

[0012] As a further solution of the present invention: The outer cover body is of a cylindrical structure, the through holes are of a conical structure, and the filter bag is of a frustum-shaped structure.

[0013] As a further solution of the present invention: The shape of the filter bag is adapted to the shape formed by the four hexagon socket head cap screws. The bottom of the filter bag is connected to the bottom plate, and a positioning ring is provided at the top of the filter bag, and the positioning ring is located on the top end of the hexagon socket head cap screws.

[0014] As a further solution of the present invention: A top ball mechanism is provided at the bottom of the oil drain cover plate. The horizontal part of the connecting pipe of the top ball mechanism is connected to a hose through a sealing connector. A piston plate is slidably arranged in the vertical part of the connecting pipe. The bottom end of the top rod is connected to the piston plate. The top end of the top rod passes through the connecting pipe and is slidably connected to the connecting pipe. The top end of the top rod is connected to a top ball block.

[0015] As a further solution of the present invention: The connecting pipe is an L-shaped pipe, and the output end of the cylinder of the top ball mechanism is connected to the sealing connector through a limiting member.

[0016] As a further solution of the present invention: A spring is sleeved on the top rod. The top end of the spring is connected to the inner wall of the connecting pipe, and the bottom end of the spring is connected to the piston plate.

[0017] As a further solution of the present invention: The limiting slide plate of the limiting member is installed on the bottom surface of the oil drain cover plate. A limiting slider is slidably arranged on the bottom surface of the limiting slide plate, and the output end of the cylinder is connected to the limiting slider.

[0018] Advantages of the present invention:

[0019] (1) For the oil discharge mechanism of the present invention, when discharging oil, remove the plug, and the oil discharge sphere will be lifted, so that the oil in the gearbox body will directly drain out along the oil discharge hole and the oil drain hole, and the oil will be guided to the designated position; therefore, the oil discharge mechanism of the present invention has the advantages of simple structure and convenient operation;

[0020] (2) For the filter element of the present invention, when discharging oil, it filters the oil residues and impurities, which can effectively solve the problem that after the oil is discharged, it needs further filtration treatment. However, through the filter element during the oil discharge process, filtration and purification treatment can be carried out, thus reducing the steps of oil treatment in the later stage and improving the efficiency of oil treatment;

[0021] (3) For the ball lifting mechanism of the present invention, when discharging oil, it can automatically lift the oil discharge sphere for oil discharge, so that it is not necessary for the staff to drill into the top of the gearbox body and hold tools to lift the oil discharge sphere for oil discharge. In this way of oil discharge, the action of lifting the sphere should be rapid, otherwise the oil may splash on the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the drawings.

[0023] Figure 1 is the structural schematic diagram of the present invention;

[0024] Figure 2 is the structural schematic diagram of the filter element in the present invention;

[0025] Figure 3 is the three-dimensional structural schematic diagram of the outer cover body in the present invention;

[0026] Figure 4 is the three-dimensional structural schematic diagram of the filter bag in the present invention;

[0027] Figure 5 is the structural schematic diagram of the connection relationship between the ball lifting mechanism and the oil discharge cover plate in the present invention;

[0028] Figure 6 is the structural schematic diagram of the ball lifting mechanism in the present invention.

[0029] In the figure: 1, oil discharge cover plate; 2, oil discharge sphere; 3, O-ring seal; 4, plug; 5, hexagon socket head cap screw; 6, gearbox body; 7, fixed seat; 8, ball lifting mechanism; 9, bottom plate; 10, outer cover body; 11, filter bag; 12, positioning ring; 13, through hole; 14, limit slide plate; 15, cylinder; 16, limit slider; 17, hose; 18, sealed connector; 19, connecting pipe; 20, ball lifting block; 21, ejector rod; 22, piston plate; 23, spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 As shown, the present invention is a gearbox oil drain device, comprising an oil drain mechanism, a gearbox body 6, and a fixing seat 7; a first opening matched with the fixing seat 7 is provided at the bottom of the gearbox body 6, and the fixing seat 7 is installed on the bottom surface of the gearbox body 6, and the sealing of the connection must be ensured during installation to prevent oil leakage, a convex hole is provided on the fixing seat 7, the upper part of the convex hole is the oil drain hole, the lower part of the convex hole is the mounting hole, and the mounting hole of the fixing seat 7 is provided with an oil drain mechanism;

[0032] The oil drain mechanism includes an oil drain cover plate 1, an oil drain ball 2, an O-ring 3, a plug 4, and a hexagon socket head screw 5. The oil drain cover plate 1 is located in the mounting hole of the fixing seat 7, and the oil drain cover plate 1 is mounted on the fixing seat 7 by bolts. An O-ring 3 is provided at the connection between the oil drain cover plate 1 and the fixing seat 7. The O-ring 3 ensures the sealing of the connection. The bolt connection facilitates the removal of the oil drain cover plate 1, and then facilitates the removal and installation of the oil drain mechanism. An oil drain hole is provided in the middle of the oil drain cover plate 1, and a plug 4 is provided in the oil drain hole. The plug 4 has its own sealing function. The gasket can perform secondary sealing on the oil drain hole to effectively prevent oil leakage. An oil drain ball 2 is arranged above the oil drain hole. The oil drain ball 2 is pressed against the oil drain hole of the oil drain cover plate 1 under the action of oil pressure and deadweight to form a line seal. Four hexagon socket cylindrical head screws 5 are arranged in a circular array around the oil drain ball 2; the hexagon socket cylindrical head screws 5 are arranged obliquely and threadedly installed on the oil drain cover plate 1. The four hexagon socket cylindrical head screws 5 form a ball cage, which can prevent the oil drain ball 2 from shifting and being unable to be reset when the oil drain ball 2 is lifted up;

[0033] The specific working of the oil drain mechanism is: when draining the oil, remove the plug 4, lift up the oil drain ball 2, so that the oil in the gear box body 6 is directly discharged along the oil drain hole and the oil drain hole, and the oil is introduced to the designated position; therefore, the oil drain mechanism of the present invention has the advantages of simple structure and convenient operation;

[0034] A filter element is sleeved on the oil draining mechanism. The filter element is used to filter oil slag and impurities when the gear box body 6 drains oil, which can effectively solve the problem that after the oil is discharged, further filtration treatment is required. During the oil draining process, the filter element can perform filtration and purification treatment, thereby reducing the steps of oil treatment in the later stage and improving the efficiency of oil treatment;

[0035] The filter element includes a bottom plate 9, an outer cover body 10, a filter bag 11, a positioning ring 12, and a through hole 13; the bottom plate 9 is of an annular structure. An elastic sleeve is arranged on the inner ring of the bottom plate 9. By arranging the elastic sleeve on the inner ring, the bottom plate 9 is fixed on the inner hexagon socket head cap screw 5 through elastic action. An outer cover body 10 is arranged on the top surface of the bottom plate 9. The outer cover body 10 is of a cylindrical structure. A plurality of groups of through holes 13 are evenly arranged on the surface of the outer cover body 10. The through holes 13 are of a conical structure. Specifically, the aperture of the conical through hole 13 at the part far from the inner hexagon socket head cap screw 5 is larger than the aperture at the part close to the inner hexagon socket head cap screw 5. The conical through holes 13 can well prevent oil slag and impurities from flowing back when entering the outer cover body 10;

[0036] A filter bag 11 is arranged in the inner cavity of the outer cover body 10. The filter bag 11 is adapted to the shape surrounded by the four inner hexagon socket head cap screws 5. The filter bag 11 is of a frustum of a cone structure. The bottom of the filter bag 11 is connected to the bottom plate 9. A positioning ring 12 is arranged at the top of the filter bag 11. The positioning ring 12 is located on the top end of the inner hexagon socket head cap screw 5; the positioning ring 12 plays a positioning role during installation. It is made of an elastic material to further improve the firmness of the filter bag 11 sleeved on the inner hexagon socket head cap screw 5;

[0037] The specific working process of this filter element is as follows: when draining oil, the oil in the gear box body 6 first passes through the through holes 13 on the outer cover body 10, and then passes through the filter bag 11 for filtration and enters the oil drain hole for discharge. The filtered oil slag and impurities will stay in the inner cavity between the outer cover body 10 and the filter bag 11. By removing the oil drain cover plate 1, then removing the outer cover body 10, and cleaning the oil slag and impurities;

[0038] A top ball mechanism 8 is provided at the bottom of the oil drain cover plate 1. The top ball mechanism 8 includes a cylinder 15, a hose 17, a sealed connector 18, a connecting pipe 19, a top ball block 20, a top rod 21, a piston plate 22, and a spring 23. The connecting pipe 19 is an L-shaped pipe. The horizontal part of the connecting pipe 19 is connected to the hose 17 through the sealed connector 18. The air inlet of the hose 17 can be supplied with compressed gas. A piston plate 22 is slidably arranged in the vertical part of the connecting pipe 19. The piston plate 22 can move up and down along the connecting pipe 19. The bottom end of the top rod 21 is connected to the piston plate 22. The top end of the top rod 21 passes through the connecting pipe 19 and is slidably connected to the connecting pipe 19. The top end of the top rod 21 is connected to the top ball block 20. A spring 23 is sleeved on the top rod 21. The top end of the spring 23 is connected to the inner wall of the connecting pipe 19, and the bottom end of the spring 23 is connected to the piston plate 22. The output end of the cylinder 15 is connected to the sealed connector 18 through a limiting member. The specific operation of this top ball mechanism 8 is as follows: Control the cylinder 15 to work. Through the limiting member and the sealed connector 18, the connecting pipe 19 is horizontally moved, and the vertical part of the connecting pipe 19 is moved to directly below the oil drain hole. Then, compressed gas is input into the hose 17. When the compressed gas enters the inner cavity of the connecting pipe 19, when the air pressure in the inner cavity of the connecting pipe 19 gradually increases, the spring 23 will be squeezed, pushing the piston plate 22 to move upward. The piston plate 22 drives the top ball block 20 to move upward through the top rod 21, pushing up the oil drain sphere 2. Then, the gear box 6 can be drained of oil. After being lifted, the compressed gas in the connecting pipe 19 is released, so that the top ball block 20 is reset under the action of the spring 23, and then the connecting pipe 19 is driven to reset through the cylinder 15. By providing the top ball mechanism 8, during oil draining, the oil drain sphere 2 can be automatically lifted for oil draining, so that it is not necessary for workers to climb to the top of the gear box 6 and hold tools to lift the oil drain sphere 2 for oil draining. In this way of oil draining, the action of lifting the sphere should be rapid, otherwise the oil may spill on the workers.

[0039] Preferably, the limiting member includes a limiting slide plate 14 and a limiting slider 16. The limiting slide plate 14 is installed on the bottom surface of the oil drain cover plate 1. A limiting slider 16 is slidably arranged on the bottom surface of the limiting slide plate 14. One end of the limiting slide plate 14 is provided with a cylinder 15. The output end of the cylinder 15 is connected to the limiting slider 16. By controlling the cylinder 15 to work, the limiting slider 16 is driven to move along the limiting slide plate 14. The provided limiting slide plate 14 and limiting slider 16 make the movement of the connecting pipe 19 more stable.

[0040] Working principle of the present invention: When draining oil, remove the plug 4; then control the cylinder 15 to work. Through the limiting member and the sealing connector 18, the connecting pipe 19 is horizontally moved, and the vertical part of the connecting pipe 19 is moved to directly below the oil drain hole. Then, compressed gas is input into the hose 17. When the compressed gas enters the inner cavity of the connecting pipe 19, as the air pressure in the inner cavity of the connecting pipe 19 gradually increases, it will squeeze the spring 23 and push the piston plate 22 to move upward. The piston plate 22 drives the top ball block 20 to move upward through the ejector rod 21, and the oil drain sphere 2 is pushed upward; thus, the gear box 6 can be drained of oil, so that the oil in the gear box 6 directly drains along the oil drain hole and the drainage hole, and the oil is guided to a specified position; at the same time, after the oil drain sphere 2 is lifted, the compressed gas in the connecting pipe 19 is released, so that the top ball block 20 is reset under the action of the spring 23, and then the connecting pipe 19 is driven to reset through the cylinder 15.

[0041] One embodiment of the present invention has been described in detail above, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A gearbox oil draining device, characterized in that, It includes an oil draining mechanism, a gear box body (6), and a fixing seat (7); a first opening adapted to the fixing seat (7) is provided at the bottom of the gear box body (6), and an oil draining mechanism is provided at the installation hole of the fixing seat (7). The oil draining cover plate (1) of the oil draining mechanism is installed on the fixing seat (7) by bolts. A drain hole is provided in the middle of the oil draining cover plate (1), a plug (4) is arranged in the drain hole, an oil draining sphere (2) is arranged above the drain hole, and four hexagon socket head cap screws (5) are arranged in a circular array around the oil draining sphere (2). The fixing seat (7) is located on the bottom surface of the gear box body (6). A convex hole is provided on the fixing seat (7). The oil drain hole is above the convex hole, and the installation hole is below the convex hole. An O-ring seal (3) is provided at the connection between the oil draining cover plate (1) and the fixing seat (7). The hexagon socket head cap screws (5) are arranged obliquely and are threadedly installed on the oil draining cover plate (1). A ball pushing mechanism (8) is provided at the bottom of the oil draining cover plate (1). The horizontal part of the connecting pipe (19) of the ball pushing mechanism (8) is connected to a hose (17) through a sealing connector (18). A piston plate (22) is slidably arranged in the vertical part of the connecting pipe (19). The bottom end of a push rod (21) is connected to the piston plate (22). The top end of the push rod (21) passes through the connecting pipe (19) and is slidably connected to the connecting pipe (19). The top end of the push rod (21) is connected to a ball pushing block (20). The connecting pipe (19) is an L-shaped pipe. The output end of the cylinder (15) of the ball pushing mechanism (8) is connected to the sealing connector (18) through a limiting member. A spring (23) is sleeved on the push rod (21). The top end of the spring (23) is connected to the inner wall of the connecting pipe (19), and the bottom end of the spring (23) is connected to the piston plate (22). The limiting slide plate (14) of the limiting member is installed on the bottom surface of the oil draining cover plate (1). A limiting slider (16) is slidably arranged on the bottom surface of the limiting slide plate (14). The output end of the cylinder (15) is connected to the limiting slider (16).

2. The gearbox oil draining device according to claim 1, characterized in that, A filter element is sleeved on the oil draining mechanism. An elastic sleeve is provided on the inner circle of the bottom plate (9) of the filter element. An outer cover body (10) is provided on the top surface of the bottom plate (9). A plurality of groups of through holes (13) are evenly arranged on the surface of the outer cover body (10). A filter bag (11) is arranged in the inner cavity of the outer cover body (10).

3. The gearbox oil draining device according to claim 2, characterized in that, The outer cover body (10) is of a cylindrical structure. The through holes (13) are of a conical structure. The filter bag (11) is of a frustum-shaped structure.

4. The gearbox oil draining device according to claim 2, characterized in that, The filter bag (11) is adapted to the shape formed by the four hexagon socket head cap screws (5). The bottom of the filter bag (11) is connected to the bottom plate (9). A positioning ring (12) is provided at the top of the filter bag (11), and the positioning ring (12) is located on the top end of the hexagon socket head cap screws (5).

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