Hydraulic pump cover with pressure relief function

Abstract

The utility model discloses a hydraulic pump cover with a pressure relief function, which relates to the technical field of hydraulic pumps and comprises a cover body, a fixing pipe is mounted on the outer side of the cover body, two vent holes are formed in the outer side of the fixing pipe, a sealing cover is arranged at the top end of the fixing pipe, a piston is slidably connected in the fixing pipe, and a pressure relief valve is arranged in the piston. Two first springs are arranged at the top of the piston, the two mounting frames slide on the two T-shaped rods correspondingly, the two second springs stretch elastically, the two mounting frames drive the two first extrusion wheels to be away from the two inclined blocks, the two first extrusion wheels are away from the two inclined blocks, and a worker lifts the sealing cover upwards; the piston can be pulled out from the interior of the fixing pipe through the two first springs, the two sliding protruding blocks and the two mounting bases, then the piston is moved down, the two mounting bases slide out of the two sliding protruding blocks, dismounting of the piston is completed, personnel can replace the piston conveniently, and therefore due to the structural design, the fixing pipe does not need to be dismounted.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pumps, in particular to a hydraulic pump cover with a pressure relief function. Background Art

[0002] The hydraulic pump is the power element of the hydraulic system. It is driven by an engine or an electric motor. It sucks oil from the hydraulic tank, forms pressurized oil and discharges it to the actuator. Hydraulic pumps are divided into gear pumps, plunger pumps, vane pumps and screw pumps according to their structure. The hydraulic pump cover is usually connected to the pump body with bolts.

[0003] The current publication number is CN218760392U, which is a hydraulic pump cover, including a mounting hole installed on the surface of the cover body; a mounting groove is opened on one side of the cover body, and a sealing ring is installed inside the mounting groove; a fixing tube is connected to the surface of the cover body, and a vent hole is opened on the surface of the fixing tube, and a spring is connected inside the fixing tube.

[0004] Although the above solution has many advantages, it also has the following disadvantages: the fixing tube and the cover body are connected by a thread, which makes it easy to disassemble the fixing tube and replace the piston inside it. However, this structural design does not allow the piston to be directly removed from the inside of the fixing tube. Therefore, personnel are required to disassemble the piston inside the fixing tube again, which increases the number of operating steps for personnel and reduces the practicality of the device. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic pump cover with a pressure relief function to solve the problem in the prior art that the piston cannot be directly removed from the inside of the fixed tube. Therefore, personnel are required to disassemble the piston inside the fixed tube again, which increases the number of operating steps for personnel.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a hydraulic pump cover with a pressure relief function, comprising a cover body, a fixed tube is installed on the outside of the cover body, two air vents are provided on the outside of the fixed tube, a sealing cover is provided on the top of the fixed tube, a piston is slidably connected inside the fixed tube, two first springs are provided on the top of the piston, the tops of the two first springs are fixedly connected to the sealing cover, a sliding structure is provided between the two first springs and the piston, both sides of the sealing cover are fixedly connected to an inclined block, a mounting bracket is provided on the outside of the inclined block, a first extrusion wheel is rotatably connected to the inside of the mounting bracket, the first extrusion wheel is arranged on the top of the inclined block and contacts the inclined block, a T-shaped rod is provided on one side of the mounting bracket, one end of the T-shaped rod passes through the mounting bracket and is slidably connected to the mounting bracket, one end of the T-shaped rod is fixedly connected to the fixed tube, a second spring is sleeved on the outside of the T-rod, and two ends of the second spring are fixedly connected to the mounting bracket and the fixed tube respectively, the bottoms of the two mounting brackets are fixedly connected to an inclined plate, and a pushing structure is provided between the two inclined plates.

[0007] Preferably, the sliding structure includes two mounting seats, both of which are fixedly connected to the top of the piston, and both of the mounting seats are slidably connected with sliding protrusions inside, and the two sliding protrusions are respectively fixedly connected to the bottom ends of the two first springs.

[0008] Preferably, a sealing gasket is installed at the bottom of the sealing cover, and the bottom of the sealing gasket is in contact with the fixed tube. The provision of the sealing gasket has a sealing effect on the connection between the sealing cover and the fixed tube.

[0009] Preferably, a plurality of positioning grooves are provided on the top of the fixing tube, and a plurality of positioning columns are fixedly connected to the bottom of the sealing cover, and the positioning columns are arranged inside the positioning grooves. The arrangement of multiple positioning columns and multiple positioning grooves can improve the stability of the sealing cover.

[0010] Preferably, the pushing structure includes an annular plate, which is slidably connected to the outside of the fixed tube, and two supports are fixedly connected to the top of the annular plate. A second extrusion wheel is rotatably connected inside the support, and the second extrusion wheel is arranged at the position of the inclined plate. A plurality of vertical grooves are opened on the outside of the fixed tube, and a plurality of sliders are fixedly connected to the inside of the annular plate. The sliders are arranged inside the vertical grooves and are slidably connected to the fixed tube.

[0011] Preferably, the pushing structure also includes multiple sliding rods, and the multiple sliding rods are respectively arranged inside multiple vertical grooves. The multiple sliders are respectively slidably connected to the outside of the multiple sliding rods. A third spring is sleeved on the outside of the sliding rod, and the two ends of the third spring are respectively fixedly connected to the slider and the fixed tube.

[0012] Preferably, a pressing block is provided on the top of the annular plate, and the pressing block is fixedly connected to the outside of the fixing tube. The setting of the pressing block makes it convenient for personnel to buckle it so as to lift the annular plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In this application, two mounting brackets slide on two T-shaped rods respectively, and two second springs are elastically stretched. The two mounting brackets drive the two first extrusion wheels away from the two inclined blocks. The personnel lift the sealing cover upward, so that the piston can be pulled out from the inside of the fixed tube through the two first springs, two sliding protrusions and two mounting seats. Then, the piston is moved down and the two mounting seats are slid out of the two sliding protrusions to complete the disassembly of the piston, which is convenient for personnel to replace. Therefore, this structural design does not require disassembly of the fixed tube.

[0015] 2. In this application, the thumb is used to press the button block and the index finger is used to lift the annular plate. Multiple sliders slide upward inside multiple vertical slots respectively. Multiple third springs are elastically compressed. The annular plate drives the two second extrusion wheels to move upward through two supports. The two second extrusion wheels squeeze the two inclined plates at the same time, thereby realizing the movement of the two mounting frames in opposite directions, which is convenient for personnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a hydraulic pump cover with a pressure relief function according to the present invention;

[0017] Figure 2 This is a schematic diagram of the fixing pipe structure of a hydraulic pump cover with a pressure relief function according to the present invention;

[0018] Figure 3 This utility model is a hydraulic pump cover with a pressure relief function Figure 2 A magnified view of the structure of part A;

[0019] Figure 4 This is a schematic diagram of the annular plate structure of a hydraulic pump cover with a pressure relief function according to the present invention;

[0020] Figure 5 This is a cross-sectional view of a fixing pipe of a hydraulic pump cover with a pressure relief function according to the utility model.

[0021] Numbers in the figure: 1. cover body; 2. fixing tube; 200. air vent; 3. sealing cover; 4. positioning column; 5. sealing gasket; 6. inclined block; 7. first spring; 8. piston; 9. mounting seat; 10. sliding protrusion; 11. first extrusion wheel; 12. mounting frame; 13. T-shaped rod; 14. second spring; 15. inclined plate; 16. support; 17. second extrusion wheel; 18. vertical groove; 19. annular plate; 20. pressing block; 21. slider; 22. sliding rod; 23. third spring. DETAILED DESCRIPTION

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] Example: Figure 1 - Figure 5 As shown, the utility model provides a technical solution of a hydraulic pump cover with a pressure relief function, including a cover body 1, a fixed tube 2 is installed on the outside of the cover body 1, two air holes 200 are opened on the outside of the fixed tube 2, a sealing cover 3 is provided on the top of the fixed tube 2, a piston 8 is slidably connected inside the fixed tube 2, two first springs 7 are provided on the top of the piston 8, the tops of the two first springs 7 are fixedly connected to the sealing cover 3, a sliding structure is provided between the two first springs 7 and the piston 8, a sealing gasket 5 is installed on the bottom of the sealing cover 3, the bottom of the sealing gasket 5 is in contact with the fixed tube 2, a plurality of positioning grooves are opened on the top of the fixed tube 2, a plurality of positioning columns 4 are fixedly connected to the bottom of the sealing cover 3, and the positioning columns 4 are provided. Placed inside the positioning groove, the sealing cover 3 is fixedly connected with an oblique block 6 on both sides, and a mounting bracket 12 is provided on the outside of the oblique block 6. The first extrusion wheel 11 is rotatably connected inside the mounting bracket 12. The first extrusion wheel 11 is arranged on the top of the oblique block 6 and contacts the oblique block 6. A T-shaped rod 13 is provided on one side of the mounting bracket 12. One end of the T-shaped rod 13 passes through the mounting bracket 12 and is slidably connected to the mounting bracket 12. One end of the T-shaped rod 13 is fixedly connected to the fixed tube 2. A second spring 14 is sleeved on the outside of the T-shaped rod 13. The two ends of the second spring 14 are respectively fixedly connected to the mounting bracket 12 and the fixed tube 2. The bottom of the two mounting brackets 12 are fixedly connected with an oblique plate 15, and a pushing structure is provided between the two oblique plates 15.

[0024] The sliding structure includes two mounting seats 9, both of which are fixedly connected to the top of the piston 8. Sliding protrusions 10 are slidably connected inside the two mounting seats 9, and the two sliding protrusions 10 are respectively fixedly connected to the bottom ends of the two first springs 7.

[0025] Specifically, the setting of the pushing structure will be further explained later, so that the two inclined plates 15 drive the two mounting frames 12 to move in opposite directions, and the two mounting frames 12 slide on the two T-shaped rods 13 respectively, and the two second springs 14 are elastically stretched, and the two mounting frames 12 drive the two first extrusion wheels 11 away, and the two first extrusion wheels 11 move away from the two inclined blocks 6. The personnel lifts the sealing cover 3 upward, so that the piston 8 can be pulled out from the inside of the fixed tube 2 through the two first springs 7, the two sliding protrusions 10 and the two mounting seats 9. Then, the piston 8 is moved down and the two mounting seats 9 are slid out from the two sliding protrusions 10 to complete the disassembly of the piston 8 for easy replacement by personnel. Therefore, this structural design does not require disassembly of the fixed tube 2.

[0026] As for the technology of the cover body 1, the solution in a hydraulic pump cover with publication number CN218760392U is adopted.

[0027] Example: Figure 2 - Figure 5 As shown, the pushing structure includes an annular plate 19, which is slidably connected to the outside of the fixed tube 2, and two supports 16 are fixedly connected to the top of the annular plate 19. The second extrusion wheel 17 is rotatably connected inside the support 16, and the second extrusion wheel 17 is arranged at the position of the inclined plate 15. A plurality of vertical grooves 18 are opened on the outside of the fixed tube 2, and a plurality of sliders 21 are fixedly connected to the inside of the annular plate 19. The sliders 21 are arranged inside the vertical grooves 18 and are slidably connected to the fixed tube 2. The pushing structure also includes a plurality of slide rods 22, and the plurality of slide rods 22 are respectively arranged inside the plurality of vertical grooves 18. The plurality of sliders 21 are respectively slidably connected to the outside of the plurality of slide rods 22. A third spring 23 is sleeved on the outside of the slide rod 22, and the two ends of the third spring 23 are respectively fixedly connected to the slider 21 and the fixed tube 2. A pressing block 20 is provided on the top of the annular plate 19, and the pressing block 20 is fixedly connected to the outside of the fixed tube 2.

[0028] Specifically, the thumb presses the button 20, and the index finger lifts the annular plate 19. The multiple sliders 21 slide upward inside the multiple vertical slots 18 respectively. The multiple third springs 23 are elastically compressed. The annular plate 19 drives the two second extrusion wheels 17 to move upward through the two supports 16. The two second extrusion wheels 17 squeeze the two inclined plates 15 at the same time, thereby realizing the movement of the two mounting frames 12 in opposite directions, which is convenient for personnel operation.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A hydraulic pump cover with a pressure relief function, characterized in that: The invention comprises a cover body (1), a fixed tube (2) is installed on the outside of the cover body (1), two air holes (200) are provided on the outside of the fixed tube (2), a sealing cover (3) is provided on the top of the fixed tube (2), a piston (8) is slidably connected inside the fixed tube (2), two first springs (7) are provided on the top of the piston (8), the tops of the two first springs (7) are fixedly connected to the sealing cover (3), a sliding structure is provided between the two first springs (7) and the piston (8), both sides of the sealing cover (3) are fixedly connected to an inclined block (6), a mounting frame (12) is provided on the outside of the inclined block (6), and the mounting frame (12) is rotatably connected inside. A first extrusion wheel (11) is provided on the top of the inclined block (6) and in contact with the inclined block (6); a T-shaped rod (13) is provided on one side of the mounting frame (12); one end of the T-shaped rod (13) passes through the mounting frame (12) and is slidably connected to the mounting frame (12); one end of the T-shaped rod (13) is fixedly connected to the fixed tube (2); a second spring (14) is sleeved on the outside of the T-shaped rod (13); two ends of the second spring (14) are fixedly connected to the mounting frame (12) and the fixed tube (2), respectively; the bottoms of the two mounting frames (12) are fixedly connected to inclined plates (15); a pushing structure is provided between the two inclined plates (15).

2. The hydraulic pump cover with pressure relief function according to claim 1, characterized in that: The sliding structure comprises two mounting seats (9), both of which are fixedly connected to the top of the piston (8), and both of which are slidably connected to sliding protrusions (10) inside the two mounting seats (9), and the two sliding protrusions (10) are respectively fixedly connected to the bottom ends of the two first springs (7).

3. The hydraulic pump cover with pressure relief function according to claim 1, characterized in that: A sealing gasket (5) is installed at the bottom of the sealing cover (3), and the bottom of the sealing gasket (5) is in contact with the fixed tube (2).

4. The hydraulic pump cover with pressure relief function according to claim 1, characterized in that: The top of the fixed tube (2) is provided with a plurality of positioning grooves, and the bottom of the sealing cover (3) is fixedly connected with a plurality of positioning columns (4), and the positioning columns (4) are arranged inside the positioning grooves.

5. The hydraulic pump cover with pressure relief function according to claim 1, characterized in that: The pushing structure comprises an annular plate (19), the annular plate (19) is slidably connected to the outside of the fixed tube (2), two supports (16) are fixedly connected to the top of the annular plate (19), a second extrusion wheel (17) is rotatably connected inside the supports (16), and the second extrusion wheel (17) is arranged at the position of the inclined plate (15), a plurality of vertical grooves (18) are opened on the outside of the fixed tube (2), a plurality of sliders (21) are fixedly connected to the inside of the annular plate (19), and the sliders (21) are arranged inside the vertical grooves (18) and are slidably connected to the fixed tube (2).

6. The hydraulic pump cover with pressure relief function according to claim 5, characterized in that: The pushing structure further comprises a plurality of slide rods (22), wherein the plurality of slide rods (22) are respectively arranged inside the plurality of vertical slots (18), and the plurality of sliders (21) are respectively slidably connected to the outside of the plurality of slide rods (22). A third spring (23) is sleeved on the outside of the slide rod (22), and the two ends of the third spring (23) are respectively fixedly connected to the slider (21) and the fixed tube (2).

7. The hydraulic pump cover with pressure relief function according to claim 5, characterized in that: A pressing block (20) is provided on the top of the annular plate (19), and the pressing block (20) is fixedly connected to the outside of the fixed tube (2).

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