Gear pump and oil passage valve block integrated module

Abstract

This utility model provides an integrated module of a gear pump and an oil circuit valve block, belonging to the field of mechanical technology. It solves the problems of non-compact structures in existing valve blocks and gear pumps. The integrated module includes a valve block with a return oil hole connecting to its bottom and an oil outlet hole connecting to its side. The oil outlet hole and the return oil hole are connected. A control component on the valve block controls the opening and closing of the oil outlet hole and the return oil hole. A gear assembly within the valve block divides its internal cavity into an oil inlet chamber and an oil outlet chamber. An oil passage hole connecting the oil outlet hole and the oil outlet chamber is also present in the valve block. The gear assembly includes a meshing driving gear and a driven gear. The top of the driving gear shaft extends beyond the top of the valve block. A bottom cover is fixedly connected to the bottom of the valve block, sealing it. The bottom cover has an oil inlet hole connecting to the oil inlet chamber. This utility model has the advantages of compact structure and low manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a hydraulic power unit component, particularly to an integrated module of a gear pump and an oil circuit valve block. Background Technology

[0002] A hydraulic power unit, also known as an oil supply device, is the core power source equipment of an industrial hydraulic control system. It is a hydraulic power system composed of components such as a motor, gear pump, oil circuit valve block, hydraulic valve, and oil tank.

[0003] For example, Chinese patent literature discloses a hydraulic power structure for recovering energy from counterweight [Application No.: 202320178236.9; Authorization Announcement No.: CN219529474U], which includes an oil tank and a servo motor. A gear pump is mounted on the top of the oil tank via a mounting bracket. A valve block is fixed to the top of the oil tank by bolts. One end of the valve block is provided with a working oil port and a return oil port. A proportional solenoid valve is connected to the working oil port through a threaded groove. A two-way check valve is connected to the return oil port through a threaded groove. An overflow valve is connected to one end of the valve block through a threaded groove. A servo motor is mounted on the top of the valve block via a mounting bracket.

[0004] The aforementioned counterweight energy recovery hydraulic power structure allows for adjustable system pressure through the setting of a proportional solenoid valve and ensures safety through an overflow valve. However, its valve block and gear pump are separate structures, which are not compact enough, have a large volume, and are expensive to manufacture. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing an integrated module for a gear pump and an oil circuit valve block that is compact in structure and low in manufacturing cost.

[0006] The objective of this utility model can be achieved through the following technical solution: an integrated module of a gear pump and an oil circuit valve block, comprising a valve block, wherein the valve block is provided with a return oil hole communicating with its bottom and an oil outlet hole communicating with its side, the oil outlet hole and the return oil hole being connected, and a control component for controlling the opening and closing of the oil outlet hole and the return oil hole being provided on the valve block, characterized in that the valve block is provided with a gear assembly that divides its inner cavity into an oil inlet chamber and an oil outlet chamber, the valve block has an oil passage hole communicating with the oil outlet hole and the oil outlet chamber, the gear assembly includes a meshing driving gear and a driven gear, the top end of the gear shaft of the driving gear extends out of the top of the valve block, and a bottom cover is fixedly connected to the bottom of the valve block to seal it, the bottom cover having an oil inlet hole communicating with the oil inlet chamber.

[0007] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the gear assembly includes an upper floating sleeve and a lower floating sleeve. The top end of the gear shaft of the driving gear passes through the upper floating sleeve and the bottom end of the gear shaft is inserted into the lower floating sleeve. The top end of the gear shaft of the driven gear is inserted into the upper floating sleeve and the bottom end of the gear shaft is inserted into the lower floating sleeve. The top surface of the upper floating sleeve is sealed to the inner wall of the valve block, and the bottom surface of the lower floating sleeve is supported and sealed by the bottom cover.

[0008] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the upper floating sleeve has an oil inlet groove 1 connected to the oil inlet chamber on one side and an oil outlet groove 1 connected to the oil outlet chamber on the other side. Both the oil inlet groove 1 and the oil outlet groove 1 are vertically arranged and connected to the meshing point of the driving gear and the driven gear. The lower floating sleeve has an oil inlet groove 2 connected to the oil inlet chamber on one side and an oil outlet groove 2 connected to the oil outlet chamber on the other side. Both the oil inlet groove 2 and the oil outlet groove 2 are vertically arranged and connected to the meshing point of the driving gear and the driven gear.

[0009] In the aforementioned integrated module of a gear pump and an oil circuit valve block, an oil seal is fitted at the top of the gear shaft of the drive gear, and a retaining ring is embedded in the valve block for the top of the oil seal to abut against.

[0010] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the valve block is provided with an overflow hole that connects its bottom and the oil passage hole, and the valve block is connected to an overflow valve that controls the opening and closing of the inner end of the overflow hole.

[0011] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the valve block has an oil outlet hole two communicating with its side, the valve block is threaded with a plug that seals the oil outlet hole two, and the oil outlet hole one is threaded with an oil outlet connector.

[0012] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the valve block is equipped with a one-way valve that allows hydraulic oil to flow unidirectionally to outlet port one and outlet port two.

[0013] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the bottom cover is fitted with a sealing ring that surrounds and seals the inner cavity of the valve block.

[0014] In the aforementioned integrated module of a gear pump and an oil circuit valve block, the sealing ring has a sealing part that seals the periphery of the lower floating sleeve and covers the lower end of the oil inlet chamber and the inner end of the oil inlet hole. The periphery of the upper floating sleeve is fitted with a sealing strip that seals the inner wall of the top of the valve block. Both ends of the sealing strip are located on the oil inlet chamber side, and the oil inlet chamber is located between the two ends of the sealing strip.

[0015] Compared with existing technologies, this integrated module of gear pump and oil circuit valve block integrates the gear assembly into the valve block, which simplifies the structure, makes the structure compact, reduces the number of parts, and lowers the manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the integrated module of the gear pump and the oil circuit valve block.

[0017] Figure 2 This is a structural cross-sectional view of the integrated module of this gear pump and oil circuit valve block.

[0018] Figure 3 yes Figure 2 Structural cross-sectional view of section AA in the middle.

[0019] Figure 4 yes Figure 2 Structural cross-sectional view of section BB in the middle.

[0020] Figure 5 yes Figure 2 Structural cross-sectional view of section CC.

[0021] Figure 6 This is a three-dimensional structural diagram of the gear assembly in the integrated module of this gear pump and oil circuit valve block.

[0022] Figure 7 This is a structural cross-sectional view of the gear assembly in the integrated module of this gear pump and oil circuit valve block.

[0023] Figure 8 This is a partial structural diagram of the integrated module of the gear pump and the oil circuit valve block.

[0024] In the diagram, 1. Valve block; 2. Oil return hole; 3. Oil outlet hole one; 4. Solenoid valve; 5. Oil inlet chamber; 6. Oil outlet chamber; 7. Oil passage hole; 8. Drive gear; 9. Driven gear; 10. Bottom cover; 11. Oil inlet hole; 12. Upper floating sleeve; 121. Oil inlet groove one; 122. Oil outlet groove one; 13. Lower floating sleeve; 131. Oil inlet groove two; 132. Oil outlet groove two; 14. Oil seal; 15. Snap ring; 16. Overflow hole; 17. Overflow valve; 18. Oil outlet hole two; 19. Plug; 20. Oil outlet connector; 21. Check valve; 22. Sealing ring; 221. Sealing part; 23. Sealing strip. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4, Figure 5 , Figure 6 and Figure 7 As shown, the integrated module of this gear pump and oil circuit valve block includes a valve block 1. The valve block 1 has a return oil hole 2 connected to its bottom and an oil outlet hole 3 connected to its side. The oil outlet hole 3 and the return oil hole 2 are connected. The valve block 1 is provided with a control component to control the opening and closing of the oil outlet hole 3 and the return oil hole 2. In this embodiment, the control component includes a solenoid valve 4 connected to the valve block 1. The inner end of the solenoid valve 4 is inserted between the oil outlet hole 3 and the return oil hole 2 to control the opening and closing of the oil outlet hole 3 and the return oil hole 2. The valve block 1 is provided with a gear assembly that divides its inner cavity into an oil inlet chamber 5 and an oil outlet chamber 6. The valve block 1 has an oil passage hole 7 that connects the oil outlet hole 3 and the oil outlet chamber 6. The gear assembly includes a meshing drive gear 8 and a driven gear 9. The top end of the gear shaft of the drive gear 8 extends out of the top of the valve block 1. The bottom of the valve block 1 is fixedly connected with a bottom cover 10 that seals it. The bottom cover 10 has an oil inlet hole 11 that connects to the oil inlet chamber 5.

[0027] This integrated module of gear pump and oil circuit valve block integrates the gear assembly into valve block 1, simplifying the structure, making it compact, reducing parts, and lowering manufacturing costs. When this integrated module of gear pump and oil circuit valve block is in use, if oil needs to be discharged, the solenoid valve 4 disconnects the return oil hole 2 and the oil outlet hole 3. The top of the drive gear 8 is connected to the motor, and the oil inlet hole 11 of the bottom cover 10 is connected to the oil tank. The motor drives the drive gear 8 to rotate, which in turn drives the driven gear 9 to rotate, drawing hydraulic oil from the oil tank into the oil inlet hole 11. The hydraulic oil is then pumped from the oil inlet chamber 5 into the oil outlet chamber 6, then into the oil passage hole 7, and finally out through the oil outlet hole 3. If oil return is needed, the solenoid valve 4 connects the oil outlet hole 3 and the return oil hole 2, allowing the hydraulic oil to flow from the oil outlet hole 3 through the return oil hole 2 back to the oil tank, thus achieving oil return.

[0028] To elaborate further, the gear assembly includes an upper floating sleeve 12 and a lower floating sleeve 13. The top end of the gear shaft of the driving gear 8 passes through the upper floating sleeve 12, and the bottom end of its gear shaft is inserted into the lower floating sleeve 13. The top end of the gear shaft of the driven gear 9 is inserted into the upper floating sleeve 12, and the bottom end of its gear shaft is inserted into the lower floating sleeve 13. The top surface of the upper floating sleeve 12 is sealed to the inner wall of the valve block 1, and the bottom surface of the lower floating sleeve 13 is supported and sealed by the bottom cover 10. The arrangement of the upper floating sleeve 12 and the lower floating sleeve 13 facilitates the machining of the valve block 1, the driving gear 8, and the driven gear 9. During assembly, the gear assembly is assembled first, and then the entire gear assembly is installed into the valve block 1, making the operation convenient.

[0029] The upper floating sleeve 12 has an oil inlet groove 121 connected to the oil inlet chamber 5 on one side and an oil outlet groove 122 connected to the oil outlet chamber 6 on the other side. Both the oil inlet groove 121 and the oil outlet groove 122 are vertically arranged and connected to the meshing point of the driving gear 8 and the driven gear 9. The lower floating sleeve 13 has an oil inlet groove 131 connected to the oil inlet chamber 5 on one side and an oil outlet groove 132 connected to the oil outlet chamber 6 on the other side. Both the oil inlet groove 131 and the oil outlet groove 132 are vertically arranged and connected to the meshing point of the driving gear 8 and the driven gear 9. This increases the volume of the oil inlet chamber 5 and the oil outlet chamber 6, increases the oil inlet and outlet volume, and improves working efficiency.

[0030] An oil seal 14 is fitted onto the top of the gear shaft of the drive gear 8, and a retaining spring 15 is embedded in the valve block 1 to allow the top of the oil seal 14 to abut against it. This ensures the sealing performance at the top of the drive gear 8, resulting in good operational stability and a long service life.

[0031] The valve block 1 has an overflow hole 16 connecting its bottom and the oil passage hole 7. The valve block 1 is connected to an overflow valve 17 that controls the opening and closing of the inner end of the overflow hole 16. When the hydraulic oil pressure reaches the set maximum value, the overflow valve 17 opens, connecting the oil passage hole 7 and the overflow hole 16. The hydraulic oil in the oil passage hole 7 flows back to the oil tank from the overflow hole 16, ensuring safe use. The overflow valve 17 includes a steel ball, a spring, and an adjusting cover. The adjusting cover is threaded to the valve block 1. The spring is located in the adjusting cover and supported by the steel ball. The spring provides elastic force to seal the steel ball against the inner wall of the valve block 1 with a shoulder. The adjusting cover is fitted with a sealing ring that seals the valve block 1. By rotating the adjusting cover, the elastic force of the spring can be adjusted, which can adjust the maximum pressure value of the hydraulic oil. When the hydraulic oil in the oil passage hole 7 exceeds the elastic force of the spring, the hydraulic oil pushes the steel ball away and returns to the oil tank from the overflow hole 16.

[0032] The valve block 1 has an oil outlet hole 2 18 that connects to its side. A plug 19, which seals the oil outlet hole 2 18, is threaded onto the valve block 1. An oil outlet connector 20 is threaded onto the oil outlet hole 3. The position of the oil outlet hole 2 18 is set according to actual conditions. In this embodiment, the outlets of both the oil outlet hole 2 18 and the oil outlet hole 3 are located on one side of the valve block 1. In actual use, the plug 19 and the oil outlet connector 20 can be interchanged, facilitating the selection of a suitable oil outlet position and improving practicality.

[0033] The valve block 1 is equipped with a one-way valve 21 that allows hydraulic oil to flow unidirectionally to outlet port 3 and outlet port 18. The one-way valve 21 ensures the direction of hydraulic oil flow, prevents backflow, and ensures operational stability. The structure of the one-way valve 21 is existing technology, and its specific structure will not be described in detail here. The bottom cover 10 is fitted with a sealing ring 22 that surrounds and seals the inner cavity of the valve block 1. The sealing ring 22 ensures the sealing between the valve block 1 and the bottom cover 10.

[0034] like Figure 7 and Figure 8 As shown, the sealing ring 22 has a sealing part 221 that seals the periphery of the lower floating sleeve 13 and covers the lower end of the oil inlet chamber 5 and the inner end of the oil inlet hole 11. The periphery of the upper floating sleeve 12 is fitted with a sealing strip 23 that seals the inner wall of the top of the valve block 1. Both ends of the sealing strip 23 are located on the side of the oil inlet chamber 5, and the oil inlet chamber 5 is located between the two ends of the sealing strip 23. This provides good sealing performance, avoids hydraulic oil leakage, and ensures good operational stability.

[0035] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. An integrated module of a gear pump and an oil circuit valve block, comprising a valve block (1), wherein the valve block (1) has a return oil hole (2) communicating with its bottom and an oil outlet hole (3) communicating with its side, the oil outlet hole (3) and the return oil hole (2) being connected, and the valve block (1) is provided with a control component for controlling the opening and closing of the oil outlet hole (3) and the return oil hole (2), characterized in that, The valve block (1) is provided with a gear assembly that divides its inner cavity into an oil inlet chamber (5) and an oil outlet chamber (6). The valve block (1) has an oil passage (7) that connects the oil outlet hole (3) and the oil outlet chamber (6). The gear assembly includes a meshing drive gear (8) and a driven gear (9). The top end of the gear shaft of the drive gear (8) extends out of the top of the valve block (1). The bottom of the valve block (1) is fixedly connected to a bottom cover (10) that seals it. The bottom cover (10) has an oil inlet hole (11) that connects to the oil inlet chamber (5).

2. A gear pump and oil way valve block integrated module according to claim 1, characterized in that, The gear assembly includes an upper floating sleeve (12) and a lower floating sleeve (13). The top end of the gear shaft of the driving gear (8) passes through the upper floating sleeve (12) and the bottom end of its gear shaft is inserted into the lower floating sleeve (13). The top end of the gear shaft of the driven gear (9) is inserted into the upper floating sleeve (12) and the bottom end of its gear shaft is inserted into the lower floating sleeve (13). The top surface of the upper floating sleeve (12) is sealed to the inner wall of the valve block (1), and the bottom surface of the lower floating sleeve (13) is supported and sealed by the bottom cover (10).

3. A gear pump and oil way valve block integrated module according to claim 2, characterized in that, The upper floating sleeve (12) has an oil inlet groove (121) connected to the oil inlet chamber (5) on one side and an oil outlet groove (122) connected to the oil outlet chamber (6) on the other side. The oil inlet groove (121) and the oil outlet groove (122) are both vertically arranged and connected to the meshing point of the driving gear (8) and the driven gear (9). The lower floating sleeve (13) has an oil inlet groove (131) connected to the oil inlet chamber (5) on one side and an oil outlet groove (132) connected to the oil outlet chamber (6) on the other side. The oil inlet groove (131) and the oil outlet groove (132) are both vertically arranged and connected to the meshing point of the driving gear (8) and the driven gear (9).

4. The integrated module of claim 3, wherein, The top end of the gear shaft of the drive gear (8) is fitted with an oil seal (14), and the valve block (1) is fitted with a snap ring (15) against the top of the oil seal (14).

5. A gear pump and oil way valve block integrated module according to claim 4, characterized in that, The valve block (1) is provided with an overflow hole (16) that connects its bottom and the oil passage hole (7), and the valve block (1) is connected to an overflow valve (17) that controls the opening and closing of the inner end of the overflow hole (16).

6. A gear pump and oil way valve block integrated module according to claim 5, characterized in that, The valve block (1) has an oil outlet hole 2 (18) that connects to its side. The valve block (1) is threaded with a plug (19) that seals the oil outlet hole 2 (18). The oil outlet hole 1 (3) is threaded with an oil outlet connector (20).

7. A gear pump and oil way valve block integrated module according to claim 6, characterized in that, The valve block (1) is equipped with a one-way valve (21) that allows hydraulic oil to flow in one direction to the oil outlet hole one (3) and the oil outlet hole two (18).

8. A gear pump and oil way valve block integrated module according to claim 7, characterized in that, The bottom cover (10) is fitted with a sealing ring (22) that surrounds and seals the inner cavity of the valve block (1).

9. A gear pump and oil way valve block integrated module according to claim 8, characterized in that, The sealing ring (22) has a sealing part (221) that seals the periphery of the lower floating sleeve (13) and covers the lower end of the oil inlet cavity (5) and the inner end of the oil inlet hole (11). The periphery of the upper floating sleeve (12) is fitted with a sealing strip (23) that seals the inner wall of the top of the valve block (1). Both ends of the sealing strip (23) are located on the side of the oil inlet cavity (5) and the oil inlet cavity (5) is between the two ends of the sealing strip (23).

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