A hydraulic grease filling device for a construction machine

Abstract

The utility model discloses a kind of hydraulic grease filling devices for engineering machinery, belong to hydraulic motor technical field. Including grease canister assembly, the installation valve body that grease is extracted from the inside of grease canister assembly is connected in the bottom of grease canister assembly, the hydraulic motor for providing power is connected with installation valve body, high-pressure grease outlet is equipped on installation valve body, high-pressure grease outlet is connected with grease gun head by connecting pipeline. Reduce the wear degree of hinge point friction pair, improve the maintenance level of structural member movable hinge point friction pair;Relies on the stable driving force and stirring mechanism of hydraulic motor, ensure that high hardness grease is effectively inhaled, and high pressure is delivered to specified distance, with higher grease filling efficiency, work reliability and the flexibility of filling different equipment.

Description

Technical Field

[0001] This utility model relates to a hydraulic grease filling device for engineering machinery, belonging to the field of hydraulic motor technology. Background Technology

[0002] In the field of bearing technology, bearings must withstand large axial and radial loads on rotating shafts during use. To reduce friction and wear caused by non-oil film contact during rotation, sufficient grease must be added inside the bearing.

[0003] Prior art, disclosed in CN205090174U, is a grease filling device, comprising a housing, a grease storage tank, a connecting pipe, a grease injection cylinder, a compression cavity of the injection cylinder, a piston rod, a hydraulic pump, a piston, a CNC box, a bracket, a positioning sleeve, a cavity of the positioning sleeve, and a grease injection hole. The grease storage tank is disposed within the housing; the hydraulic pump is disposed within the grease storage tank; one end of the connecting pipe is connected to the hydraulic pump, and the other end of the connecting pipe is connected to the compression cavity of the injection cylinder; the bracket is disposed on one side of the housing, and the CNC box is disposed on the upper end of the bracket. Its power source relies on a hydraulic pump and a power supply, which limits its operating environment. Summary of the Invention

[0004] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a hydraulic grease filling device for engineering machinery. This device reduces the wear of hinge friction pairs, improves the maintenance level of moving hinge friction pairs in structural components, and ensures effective intake of high-hardness grease by relying solely on the stable driving force of a hydraulic motor and a stirring mechanism. The grease is delivered under high pressure to a designated distance, resulting in good grease filling efficiency, operational reliability, and flexibility in filling different equipment.

[0005] Technical solution: To achieve the above technical objectives, a hydraulic grease filling device for engineering machinery is disclosed, including a grease tank assembly. The bottom of the grease tank assembly is connected to an installation valve body that draws grease from the grease tank assembly. The installation valve body is connected to a hydraulic motor that provides power. The installation valve body is provided with a high-pressure grease outlet, and the high-pressure grease outlet is connected to a grease gun head through a connecting pipe. The valve body is a horizontally opposed structure, including a valve body shell. An eccentric ring assembly is located in the middle of the valve body shell. On both sides of the eccentric ring assembly, horizontally opposed plunger assemblies are located inside the valve body shell. The plunger assemblies are used to draw grease from the grease tank assembly through piston movement. The symmetrically arranged plunger assemblies are all provided with suction ports that communicate with the grease tank assembly and are respectively connected to high-pressure grease outlets. The eccentric ring assembly includes an eccentric ring connected to the output shaft of the hydraulic motor. A bearing connected to the plunger assembly is sleeved on the outer side of the eccentric ring. The inner and outer rings of the bearing are provided with bearing baffles. The eccentric ring is provided with a retaining spring to prevent the bearing baffles from moving. The output shaft of the hydraulic motor is connected to a stirring device that extends into the grease tank assembly through a pad.

[0006] Furthermore, the grease container assembly includes a grease container, a lower locking buckle, a locking hook, and a lid. The grease container has upper and lower openings, with the lower opening connected to the valve body. The lid is located at the upper opening of the grease container, and locking hooks are provided on both sides of the lid. The grease container has lower locking buckles on both sides. The lower locking buckles and locking hooks ensure that the lid and the grease container are tightly fastened together.

[0007] Furthermore, a sealing gasket is provided between the plunger cylinder and the mounting valve body; the lower opening of the grease tank is provided with a flange structure, which matches the valve body shell of the mounting valve body and is fixed by mounting bolt A; an O-ring is provided between the flange of the grease tank and the upper opening of the mounting valve body; and an axial seal is provided between the plunger plug and the mounting valve body.

[0008] Furthermore, the valve body is equipped with a transverse flow channel that connects the high-pressure flow channels of the left and right plunger assemblies. The transverse flow channel connects the high-pressure flow channels on the left and right sides and is connected to the high-pressure grease outlet.

[0009] Furthermore, the grease container assembly includes a grease container, a lower locking buckle, a locking hook, and a lid. The grease container has an opening at the top, and the lid is located at the opening. Locking hooks are provided on both sides of the lid, and lower locking buckles are provided on both sides of the grease container. The lower locking buckles and locking hooks ensure that the lid and the grease container are tightly fastened together.

[0010] Furthermore, the stirring device includes a stirring plate that is horizontally fixed to the top of the pad by stirring bolts, and a vertical stirring rod is provided at the end of the stirring plate.

[0011] Furthermore, the hydraulic motor includes an inlet connector and an outlet connector, with a shut-off valve connected to the inlet connector via a conversion connector.

[0012] The beneficial effects are as follows: This utility model's hydraulic grease filling device can utilize the hydraulic oil source on the engineering machinery it serves. By driving the hydraulic motor of the hydraulic grease filling device, it can maintain the filling pressure, delivery distance, and filling flow rate of the grease, thereby improving the grease filling efficiency of the hinge friction pairs of the engineering equipment. It avoids manual grease filling, greatly reducing labor intensity. Furthermore, this utility model can flexibly fill grease for various engineering equipment containing hydraulic systems, with a wide range of applicable equipment. It reduces the wear of hinge friction pairs and improves the maintenance level of moving hinge friction pairs in structural components. In addition, in special equipment and in extremely cold outdoor conditions during winter, where the grease hardness is high, this utility model can rely on the stable driving force of the hydraulic motor and the stirring mechanism to ensure effective intake of high-hardness grease and high-pressure delivery to the designated distance. It has high grease filling efficiency, operational reliability, and flexibility in filling different equipment, and has broad engineering application value. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the hydraulic grease filling device of this utility model; Figure 2 This is a schematic diagram of the appearance of the hydraulic grease filling device of this utility model; Figure 3 This is a schematic diagram of the hydraulic principle of this utility model.

[0014] In the diagram, 1. Mounting base; 2. Hydraulic motor; 3. Mounting valve body; 4. Piston plug; 5. Flow control valve spring; 6. Ball valve core; 7. Sealing gasket; 8. O-ring seal; 9. Piston cylinder; 10. Piston spring; 11. Piston; 12. Spring seat; 13. Eccentric ring; 14. Snap ring; 15. Bearing baffle; 16. Pad; 17. Stirring plate; 18. Stirring bolt; 19. Stirring rod; 20. Lower locking buckle; 21. Locking hook; 22. Bucket lid; 23. Grease container; 24. Bearing; 25. Piston axial seal; 26. Inlet connector; 27. Adapter connector; 28. Gate valve; 29. ​​Mounting bolt A; 30. Outlet connector. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1As shown, this invention discloses a hydraulic grease filling device for engineering machinery. The hydraulic motor 2 is fixed to the mounting valve body 3 by bolts, and the mounting valve body 3 is fixed to the mounting base 1 by bolts. The grease tank assembly includes a grease tank 23, a lower locking buckle 20, a locking hook 21, and a lid 22. An O-ring seal 8 is installed between the flanges of the mounting valve body 3 and the grease tank 23. The grease tank assembly is bolted to the mounting valve body 3. The lower locking buckle 20 is welded to the grease tank 23, and the locking hook 21 is welded and fixed to the lid 22. The lower locking buckle 20 and the locking hook 21 make the lid 22 and the grease tank 23 fit together. When grease needs to be added to the grease tank 23 of the hydraulic grease filling device, the lower locking buckle 20 is manually opened and the lid 22 is removed. The mounting base 1 can be fixed in a set position by bolt connection, thus realizing the installation of the hydraulic grease filling device of this invention on the engineering machinery equipment it serves.

[0017] During operation, the hydraulic oil source on the engineering machinery equipment is used as the power source. The hydraulic oil source enters the shut-off valve 28, and then enters the hydraulic motor 2 through the conversion connector 27 and the inlet connector 26. After being discharged from the outlet connector 30, it returns to the oil tank. The hydraulic oil source drives the hydraulic motor 2 to rotate. The main shaft of the hydraulic motor 2 is connected to the eccentric ring assembly through a flat key, so that the eccentric ring assembly rotates counterclockwise with the main shaft. The eccentric ring 13 is equipped with a bearing baffle 15, a bearing 24, and a retaining ring 14. The bearing baffle 15 and the retaining ring 14 are used to prevent the bearing 24 from moving axially. The pad 16 and the stirring bolt 18 are used to limit the eccentric ring 13 from moving axially.

[0018] When the eccentric ring assembly rotates with the hydraulic motor 2, due to the eccentricity of the eccentric ring 13, the bearing 24 on the eccentric ring assembly pushes the left and right plungers 11 to reciprocate; the purpose of the reciprocating motion of the two plungers 11 is to... Figure 1Taking the left plunger 11 as an example, when the plunger 11 moves to the right, the ball valve core 6 is pressed against the plunger cylinder 9 under the action of the distribution valve spring 5. At this time, a negative pressure is formed in the sealed area between the plunger cylinder 9, the plunger, and the ball valve core 6. When the plunger 11 moves past the suction port on the plunger cylinder 9, the grease is pressed into the plunger cylinder 9 through the suction port under the action of the atmosphere. Under the action of the eccentric ring 13, when the plunger 11 moves to the left and completely blocks the suction port on the plunger cylinder 9, the plunger 11 pushes the grease in the plunger cylinder 9 and discharges it under high pressure. At this time, under the action of the grease pressure, the ball valve core 6 opens, and the high-pressure grease enters the high-pressure flow channel on the valve body 3 through the flow hole between the plunger plug 4 and the end face of the plunger cylinder 9. The valve body 3 is provided with high-pressure flow channels on both the left and right sides. The valve body 3 is machined with a transverse flow channel on the rear side to connect the high-pressure flow channels on the left and right sides and to the high-pressure grease outlet. The plunger assembly includes a plunger 11, a plunger cylinder 9, a sealing gasket 7, a plunger spring 10, a spring seat 12, a distribution valve spring 5, a ball valve core 6, and a plunger axial seal 25; the plunger assembly 1 corresponds to... Figure 1 The plunger assembly on the left side, plunger assembly 2 corresponds to Figure 1 When the bearing 24 pushes the plunger 11 to the leftmost position (position 1) in the right-hand plunger assembly, the eccentricity of the eccentric ring 13 reaches its maximum. The eccentric ring 13 continues to rotate, and the plunger 11 moves to the right under the action of the plunger spring 10 and spring seat 12. During this process, the ball valve core 6, under the action of the distribution valve spring 5, comes into contact with the right conical surface of the plunger cylinder 9 to form a sealing surface. When the plunger 11 moves to the suction port on the plunger cylinder 9, atmospheric pressure forces the grease into the interior of the plunger cylinder 9. After the eccentric ring 13 rotates 180° counterclockwise from position 1, the left-hand plunger 11 is used as an example. The right-hand side plunger 11 is a mirror image of the left-hand side plunger 11. When the side plunger 11 moves to the rightmost position (position 2), the eccentric ring 13 continues to rotate. At this time, the ball valve core 9 in the plunger assembly on the right side of the valve body 3 closes, and the bearing 24 pushes the plunger 11 to begin moving to the left. Some of the grease in the plunger cylinder 9 is drawn out from the suction port. The inlet is squeezed back into the grease tank 23. The suction port on the plunger cylinder 9 is connected to the grease tank 23. The grease sucked in by the plunger 11 when it moves to the right is squeezed out of the plunger cylinder 9 when the plunger 11 moves to the left. When the plunger 11 completely blocks the suction port on the plunger cylinder 9, the remaining grease in the plunger cylinder 9 will be squeezed out. When the plunger 11 completely blocks the suction port on the plunger cylinder 9, the grease in the plunger cylinder 9 will form high pressure under the compression of the plunger 11. Under the action of the grease pressure, it overcomes the flow distribution valve spring 5 to open the ball valve core 6 and delivers the high-pressure grease to the high-pressure flow channel through the flow passage. There is a flow passage between the plunger plug 4 and the end face of the plunger cylinder 9, and then it is discharged from the high-pressure grease outlet on the valve body 3. When the plunger 11 moves to the leftmost position (position 1), the plunger assembly completes a complete grease output.

[0019] The function of the bearing 24 is that when the plunger 11 is pushed, the inner ring of the bearing 24 rotates with the eccentric ring 13, while the outer ring of the bearing 24 remains basically stationary in the circumferential direction due to the compression and friction of the plunger 11. This transforms the sliding friction between the plunger 11 and the eccentric ring assembly into the rolling friction of the bearing 24 itself, thus avoiding frictional wear between the plunger 11 and the eccentric ring assembly.

[0020] The plunger plug 4 and the mounting valve body 3 are connected by a pipe thread, and the plunger plug 4 is provided with a plunger axial seal 25 for sealing the high-pressure grease in the high-pressure flow channel. Two plunger assemblies are installed on the left and right sides of the mounting valve body 3. Each plunger assembly has a high-pressure flow channel machined at the outlet of the ball valve core 6. The high-pressure grease discharged from the plunger assembly is connected through the high-pressure flow channel and converges to the high-pressure grease outlet on the mounting valve body 3 for discharge.

[0021] Because the grease has poor fluidity, it is easy for the plunger assembly to suck up the grease and cause it to be sucked into the air. The stirring assembly rotates with the main shaft of the hydraulic motor 2. The stirring plate 17 stirs the grease in the grease tank 23 to the vicinity of the suction port of the plunger cylinder 9. The stirring rod 19 is used to stir the grease in the upper part of the grease tank 23 down to the bottom.

[0022] A hydraulic grease filling device for engineering machinery, wherein when the left plunger assembly on the valve body 3 draws in grease, that is, when the plunger 11 moves to the right and exposes the suction port on the plunger cylinder 9, the grease is drawn in from the suction port of the plunger cylinder 9, and the right plunger assembly discharges the grease; when the left plunger assembly on the valve body 4 discharges the grease, the right plunger assembly draws in the grease, and the two plunger assemblies alternately draw in and discharge the grease in an orderly manner.

[0023] like Figure 2 As shown, the grease tank assembly is fixed to the mounting valve body 3 by a flange and mounting bolts A. The mounting valve body 3 is equipped with a safety valve and a pressure gauge. The high-pressure flow channel on the mounting valve body 3 is connected to the inlet of the safety valve. When the output grease pressure is too high, the safety valve opens, and the high-pressure grease flows back into the grease tank through the overflow channel on the mounting valve body 3, thus providing pressure limiting protection. The pressure gauge is connected to the high-pressure flow channel on the mounting valve body 3 and can measure and display the output grease pressure. The high-pressure grease output by the hydraulic grease filling device of this invention is connected to the connecting pipeline through the high-pressure grease outlet, and then connected to the grease gun head. When filling the hinge friction pair of the engineering machinery equipment with grease, the operator turns on the switch of the grease gun head, and the high-pressure grease is output. At this time, the grease gun head is connected to the grease connector on the hinge friction pair, and the high-pressure grease is filled into the gap of the hinge friction pair, thereby achieving lubrication.

[0024] The principle of a hydraulic grease filling device for engineering machinery is as follows: Figure 3 As shown, the hydraulic motor is fed with liquid from port A, which ensures that the hydraulic motor 2 rotates counterclockwise. This causes the stirring component to be obstructed by the grease, and at this time, the stirring component is subjected to clockwise resistance. The thread on the main shaft of the hydraulic motor 2 is machined as a right-hand thread, which ensures that the stirring component is always subjected to clockwise tightening force during operation, and the stirring bolt 18 will not loosen.

[0025] Simultaneously, the hydraulic oil source p driving the hydraulic motor 2 is drawn from the hydraulic system of the engineering machinery equipment being served. The hydraulic oil source p drives the hydraulic motor 2 through the shut-off valve 28 into port A of the hydraulic motor 2, and discharges from port B of the hydraulic motor 2. Port B of the hydraulic motor 2 discharges into the oil tank.

[0026] The hydraulic motor 2 drives the eccentric ring assembly to rotate, which in turn drives the plunger assembly 1 and plunger assembly 2 to draw in the grease and discharge it under high pressure. The high-pressure grease is discharged from the high-pressure grease outlet on the mounting valve body 3 and further delivered to the hinge friction pair interface that needs to be lubricated through the connecting pipeline and the grease gun head.

Claims

1. A hydraulic grease filling device for engineering machinery, characterized in that, The grease tank assembly includes a grease tank assembly with a mounting valve body (3) connected to the bottom of the grease tank assembly to extract grease from the grease tank assembly. The mounting valve body (3) is connected to a hydraulic motor (2) to provide power. The mounting valve body (3) is provided with a high-pressure grease outlet, which is connected to a grease gun head through a connecting pipe. The valve body (3) is a horizontally opposed valve body structure, including a valve body shell with an upper opening. An eccentric ring assembly is provided in the middle of the valve body shell. On both sides of the eccentric ring assembly, there are plunger assemblies horizontally opposed inside the valve body shell, which draw grease from the grease tank assembly through piston movement. The symmetrically arranged plunger assemblies are all provided with suction ports that are connected to the grease tank assembly and are respectively connected to the high-pressure grease outlet. The eccentric ring assembly includes an eccentric ring (13) connected to the output shaft of the hydraulic motor (2). A bearing (24) connected to the plunger assembly is sleeved on the outside of the eccentric ring (13). The inner and outer rings of the bearing (24) are provided with bearing baffles (15). A snap ring (14) is provided on the eccentric ring (13) to prevent the bearing baffles (15) from moving. The output shaft of the hydraulic motor (2) is connected to a stirring device that extends into the grease tank assembly through a pad (16).

2. The hydraulic grease filling device for engineering machinery according to claim 1, characterized in that, The connecting plunger assembly includes a plunger (11) that rests against the bearing (24) and is horizontally arranged. The plunger (11) has a ball valve at its end. The ball valve includes a plunger plug (4), a flow distribution valve spring (5), a ball valve core (6), and a plunger cylinder (9). The plunger (11) end is inserted into the plunger cylinder (9) to form a piston structure. The side wall of the plunger cylinder (9) has a suction port that opens or closes as the plunger (11) moves. The tail of the plunger (11) has a plunger spring (10) sleeved on the outside of the plunger (11) and the plunger cylinder (9) through a spring seat (12). The plunger cylinder (9) has a ball valve core (6). The ball valve core (6) is pressed by the plunger plug (4) through the flow distribution valve spring (5) at the end of the plunger cylinder (9). There is a flow passage between the plunger plug (4) and the end of the plunger cylinder (9) that is controlled to open and close by the ball valve core (6). The flow passage is connected to the high-pressure grease outlet through a high-pressure flow channel.

3. The hydraulic grease filling device for engineering machinery according to claim 1, characterized in that, The valve body (3) is provided with a transverse flow channel that connects the high-pressure flow channels of the left and right plunger assemblies. The transverse flow channel connects the high-pressure flow channels on the left and right sides and is connected to the high-pressure grease outlet.

4. The hydraulic grease filling device for engineering machinery according to claim 1, characterized in that, The grease container assembly includes a grease container (23), a lower latch (20), a latch hook (21), and a lid (22). The grease container (23) has openings at the top and bottom. The lower opening is connected to the valve body (3). The lid (22) is located at the opening of the grease container (23). The lid (22) has latch hooks (21) on both sides. The grease container (23) has lower latches (20) on both sides. The lid (22) and the grease container (23) are fastened together by the lower latches (20) and the latch hooks (21).

5. The hydraulic grease filling device for engineering machinery according to claim 4, characterized in that, A sealing gasket (7) is provided between the plunger cylinder (9) and the mounting valve body (3); the lower opening of the grease tank (23) is provided with a flange structure, which matches the valve body shell of the mounting valve body (3) and is fixed by mounting bolt A (29); an O-ring (8) is provided between the flange of the grease tank (23) and the upper opening of the mounting valve body (3); and a plunger axial seal (25) is provided between the plunger plug (4) and the mounting valve body (3).

6. The hydraulic grease filling device for engineering machinery according to claim 1, characterized in that, The stirring device includes a stirring plate (17) that is horizontally set on the top of the pad (16) by stirring bolts (18), and a stirring rod (19) that is vertically set at the end of the stirring plate (17).

7. The hydraulic grease filling device for engineering machinery according to claim 1, characterized in that, The hydraulic motor (2) includes an inlet connector (26) and an outlet connector (30). A shut-off valve (28) is connected to the inlet connector (26) via a conversion connector (27).

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