Bidirectional cycloid pump with independent pressure regulating mechanism

Abstract

The utility model provides a two-way cycloid pump with an independent pressure regulating mechanism, which relates to the technical field of two-way cycloid pumps and comprises a pump body, and the outer surface of the pump body is fixedly connected with a pressure regulating valve component through a bolt; the pressure regulating valve assembly comprises a shell, and a steel cap is arranged on the inner surface of the shell. According to the oil pump, part of oil of the oil outlet is distributed to the second oil way through the pressure regulating valve assembly, one oil way in an original oil pump is changed into two oil ways, the output pressure of the oil pump can be reduced, the internal pressure of the oil pump is effectively regulated, the internal temperature of the oil pump is reduced, and the service life of the oil pump is prolonged; the extrusion force of the pressure adjusting spring is controlled through manual screwing-in and screwing-out, locking is conducted through the locking nut, when the oil pressure of the oil outlet is larger than the extrusion force of the pressure adjusting spring, the steel cap is jacked up through the oil pressure, then the jacking distance of the steel cap can be manually adjusted, the flow of the second oil way is controlled, and the oil pressure in the oil pump is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of bidirectional cycloid pumps, in particular to a bidirectional cycloid pump with an independent pressure regulating mechanism. Background Art

[0002] The core components of a bidirectional cycloid pump are an eccentric cycloid disk and multiple plungers. When the cycloid disk rotates, the plungers move along the cycloid under the action of eccentric force, realizing the suction and discharge of liquid. Due to its design features, the bidirectional cycloid pump can operate in both forward and reverse directions, suitable for applications requiring bidirectional flow.

[0003] The existing bidirectional cycloid pump only realizes the characteristic function that the oil inlet and outlet always flow in one direction regardless of whether the power transmission shaft rotates clockwise or counterclockwise. It cannot meet the requirements of some customers for adjustable pressure output through the oil pump. In addition, the existing bidirectional cycloid pump has only one oil path from the oil inlet to the oil outlet. During high-speed operation, the excessive internal pressure can easily lead to excessive oil temperature, reducing the service life of the oil pump components and thus reducing the overall service life of the oil pump. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing bidirectional cycloid pump only realizes the characteristic function that the oil inlet and outlet always flow in one direction regardless of whether the power transmission shaft rotates clockwise or counterclockwise, which cannot meet the demand of some customers for adjustable pressure output through the oil pump, and the existing bidirectional cycloid pump has only one oil path from the oil inlet to the oil outlet. During high-speed operation, the internal pressure is too high, which easily leads to excessive oil temperature, shortening the service life of the oil pump components and thus shortening the overall service life of the oil pump. Therefore, a bidirectional cycloid pump with an independent pressure regulating mechanism is proposed.

[0005] In order to achieve the above object, the utility model adopts the following technical solution: a bidirectional cycloid pump with an independent pressure regulating mechanism, comprising: a pump body, the outer surface of which is fixedly connected to a pressure regulating valve assembly by bolts;

[0006] The pressure regulating valve assembly includes a shell, the inner surface of the shell is provided with a steel cap, the inner surface of the steel cap is provided with a pressure regulating spring, one end of the pressure regulating spring is fixedly connected to a pressure regulating stopper, the outer surface of the pressure regulating stopper is provided with a screw sleeve, the outer surface of the screw sleeve is provided with an O-ring B near the bottom, the outer surface of the pressure regulating stopper is provided with an O-ring A, the top thread of the screw sleeve is penetrated by a screw, the outer surface of the screw is threadedly connected to a locking nut, and the outer surface of the screw sleeve is threadedly connected to a nut near the top.

[0007] Preferably, the outer surface of the screw sleeve is threadedly connected to the inner surface of the shell near the bottom, and the outer surface of the shell is fixedly connected to the outer surface of the pump body by bolts.

[0008] Preferably, an oil pump main shaft is provided on the inner surface of the pump body, and an inner rotor is provided on the outer surface of the oil pump main shaft.

[0009] Preferably, the outer surface of the inner rotor is provided with an outer rotor, and the inner surface of the inner rotor is provided with a circular key.

[0010] Preferably, an eccentric wheel is provided on the outer surface of the outer rotor, and a limit spring is provided on the inner surface of the eccentric wheel.

[0011] Preferably, a bearing is installed on the outer surface of the oil pump main shaft near the front side, and a large cover is fixedly connected to the front surface of the pump body by bolts.

[0012] Preferably, an oil seal is provided on the rear side of the outer surface of the oil pump main shaft, and a retaining spring is provided on the rear side of the outer surface of the oil pump main shaft.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the utility model, part of the oil at the oil outlet is diverted to the second oil circuit through the pressure-regulating valve assembly, and the original one oil circuit inside the oil pump is adjusted to two oil circuits, which can reduce the pressure output by the oil pump, effectively regulate the internal pressure of the oil pump, reduce the internal temperature of the oil pump, and improve the service life of the oil pump. The extrusion force of the pressure-regulating spring is controlled by manually screwing it in and out, and locked by the locking nut. When the oil pressure at the oil outlet is greater than the extrusion force of the pressure-regulating spring, the oil pressure will lift the steel cap, and then the lifting distance of the steel cap can be manually adjusted to control the flow rate of the second oil circuit and regulate the oil pressure inside the oil pump.

[0015] 2. In the present invention, the pressure regulating valve assembly is connected to the external pump body by bolts and can be installed on other types of bidirectional cycloid pumps. It has strong versatility and can be mass-produced, greatly improving product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a three-dimensional diagram of a bidirectional cycloid pump with an independent pressure regulating mechanism;

[0017] Figure 2 The utility model proposes a partial structural explosion diagram of a bidirectional cycloid pump with an independent pressure regulating mechanism;

[0018] Figure 3 The utility model proposes a first oil circuit diagram of a bidirectional cycloid pump with an independent pressure regulating mechanism;

[0019] Figure 4 This utility model proposes an exploded diagram of a pressure regulating valve assembly of a bidirectional cycloid pump with an independent pressure regulating mechanism.

[0020] Figure 5 This utility model proposes a cross-sectional view of a pressure regulating valve assembly of a bidirectional cycloid pump with an independent pressure regulating mechanism.

[0021] Figure 6 The utility model provides a second oil circuit schematic diagram of a bidirectional cycloid pump with an independent pressure regulating mechanism.

[0022] Legend: 1. Large cover; 2. Bearing; 3. Limit spring; 4. Eccentric wheel; 5. Outer rotor; 6. Inner rotor; 7. Round key; 8. Oil pump main shaft; 9. Oil seal; 10. Circlip; 11. Pressure regulating valve assembly; 12. Pump body; 1101. Housing; 1102. Steel cap; 1103. Pressure regulating spring; 1104. O-ring A; 1105. Pressure regulating stopper; 1106. O-ring B; 1107. Screw sleeve; 1108. Lock nut; 1109. Screw; 1110. Nut. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Example 1, as Figures 1-6As shown, the utility model provides a bidirectional cycloid pump with an independent pressure regulating mechanism, comprising: a pump body 12, the outer surface of the pump body 12 is fixedly connected to a pressure regulating valve assembly 11 by bolts; the pressure regulating valve assembly 11 comprises a shell 1101, the inner surface of the shell 1101 is provided with a steel cap 1102, the inner surface of the steel cap 1102 is provided with a pressure regulating spring 1103, one end of the pressure regulating spring 1103 is fixedly connected to a pressure regulating block 1105, the outer surface of the pressure regulating block 1105 is sleeved with a screw sleeve 1107, the top thread of the screw sleeve 1107 is penetrated by a screw 1109, and the outer surface of the screw 1109 is threadedly connected to a locking nut 11 08. The outer surface of the screw sleeve 1107 is threadedly connected with a nut 1110 near the top, and the outer surface of the screw sleeve 1107 is threadedly connected with the inner surface of the shell 1101 near the bottom. The inner surface of the pump body 12 is provided with an oil pump main shaft 8, and the outer surface of the oil pump main shaft 8 is provided with an inner rotor 6, and the outer surface of the inner rotor 6 is provided with an outer rotor 5. The inner surface of the inner rotor 6 is provided with a round key 7, and the outer surface of the outer rotor 5 is provided with an eccentric wheel 4. The inner surface of the eccentric wheel 4 is provided with a limit spring 3. The outer surface of the oil pump main shaft 8 is installed with a bearing 2 near the front side, and the front surface of the pump body 12 is fixedly connected to the large cover 1 by bolts.

[0026] The effect achieved by the entire embodiment 1 is that after the oil pump body 12 is connected to the motor, the rotation of the external motor drives the oil pump main shaft 8 to rotate, and the rotation is made more stable through the bearing 2 and the large cover 1. The rotation of the oil pump main shaft 8 drives the inner rotor 6 to rotate. After the rotation, the inner rotor 6 will drive the outer rotor 5 to rotate, causing the eccentric wheel 4 to rotate, and then the oil at the oil inlet is sucked in and flows out from the oil outlet. This oil circuit is the first oil circuit, and the oil pressure of the oil pump cannot be adjusted. After the pressure regulating valve assembly 11 is installed on the pump body 12 by bolts, when the oil at the oil inlet passes through the first oil circuit and reaches the oil outlet, when the oil pressure at the oil outlet reaches a certain value, such as exceeding the squeezing force of the pressure regulating spring 1103, the oil at the oil outlet will push up the steel cap 1102 in the pressure regulating valve assembly 11. At this time, the second oil circuit is opened, and the oil at the oil outlet returns to the oil inlet through the second oil circuit, thereby reducing the pressure output by the oil pump. When the oil pressure at the oil outlet is greater than the squeezing force of the pressure-regulating spring 1103, the oil pressure will lift the steel cap 1102, and then the lifting distance of the steel cap 1102 can be manually adjusted to control the flow rate of the second oil circuit and adjust the oil pressure inside the oil pump.

[0027] Example 2, as Figures 1-6 As shown, the outer surface of the shell 1101 is fixedly connected to the outer surface of the pump body 12 by bolts, the outer surface of the oil pump main shaft 8 is provided with an oil seal 9 at the rear position, the outer surface of the oil pump main shaft 8 is provided with a retaining ring 10 at the rear position of the oil seal 9, the outer surface of the screw sleeve 1107 is provided with an O-ring B1106 near the bottom, and the outer surface of the pressure regulating block 1105 is provided with an O-ring A1104.

[0028] The effect achieved by the entire embodiment 2 is that the pressure-regulating valve assembly 11 is connected to the external pump body 12 by bolts, can be installed on other types of bidirectional cycloid pumps, has strong versatility, can be mass-produced, and greatly improves product production efficiency. The O-ring B1106 ensures the sealing when the screw sleeve 1107 is connected to the housing 1101, and the O-ring A1104 ensures the sealing when the pressure-regulating block 1105 moves in the screw sleeve 1107.

[0029] Working principle: After the oil pump body 12 is connected to the motor, the rotation of the external motor drives the oil pump main shaft 8 to rotate, and the bearing 2 and the large cover 1 make its rotation more stable. The rotation of the oil pump main shaft 8 drives the inner rotor 6 to rotate, and the inner rotor 6 drives the outer rotor 5 to rotate after the rotation, so that the eccentric wheel 4 rotates, and then the oil in the oil inlet is sucked in and flows out from the oil outlet. This oil circuit is the first oil circuit, and the oil pressure of the oil pump cannot be adjusted. The pressure regulating valve assembly 11 is installed by bolts. After being installed on the pump body 12, when the oil at the oil inlet reaches the oil outlet after passing through the first oil circuit, when the oil pressure at the oil outlet reaches a certain value, such as exceeding the squeezing force of the pressure regulating spring 1103, the oil at the oil outlet will lift the steel cap 1102 in the pressure regulating valve assembly 11, and the second oil circuit will open at this time, and the oil at the oil outlet will return to the oil inlet through the second oil circuit, thereby reducing the pressure output by the oil pump, and then regulating the internal pressure of the oil pump, reducing the temperature rise caused by excessive oil pressure when the oil pump runs at high speed, and improving the service life of the oil pump. When the pressure needs to be adjusted, the nut 1110 is manually unscrewed, and then the screw 1109 is manually screwed in. The screw 1109 pushes the pressure regulating block 1105 inward, causing the pressure regulating spring 1103 to be compressed and squeeze the steel cap 1102. When the screw 1109 is manually unscrewed, the pressure regulating block 1105 moves outward with the screw 1109 due to being squeezed by the pressure regulating spring 1103. The squeezing force of the pressure regulating spring 1103 is controlled by manually screwing in and out, and the pressure is adjusted by the locking nut. 1108 is locked. When the oil pressure at the oil outlet is greater than the squeezing force of the pressure-regulating spring 1103, the oil pressure will lift up the steel cap 1102. The lifting distance of the steel cap 1102 can be manually adjusted to control the flow of the second oil circuit and adjust the internal oil pressure of the oil pump. The sealing of the screw sleeve 1107 and the housing 1101 is guaranteed by the O-ring B1106, and the sealing of the pressure-regulating block 1105 when it moves in the screw sleeve 1107 is guaranteed by the O-ring A1104.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A bidirectional cycloid pump with an independent pressure regulating mechanism, characterized in that: include: A pump body (12), wherein the outer surface of the pump body (12) is fixedly connected to a pressure regulating valve assembly (11) by bolts; The pressure regulating valve assembly (11) comprises a shell (1101), the inner surface of the shell (1101) is provided with a steel cap (1102), the inner surface of the steel cap (1102) is provided with a pressure regulating spring (1103), one end of the pressure regulating spring (1103) is fixedly connected to a pressure regulating stopper (1105), the outer surface of the pressure regulating stopper (1105) is provided with a screw sleeve (1107), the outer surface of the screw sleeve (1107) is provided with an O-ring b (1106) near the bottom, the outer surface of the pressure regulating stopper (1105) is provided with an O-ring A (1104), the top thread of the screw sleeve (1107) is penetrated by a screw (1109), the outer surface of the screw (1109) is threadedly connected to a locking nut (1108), and the outer surface of the screw sleeve (1107) is threadedly connected to a nut (1110) near the top.

2. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 1, characterized in that: The outer surface of the screw sleeve (1107) is threadedly connected to the inner surface of the housing (1101) near the bottom, and the outer surface of the housing (1101) is fixedly connected to the outer surface of the pump body (12) via bolts.

3. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 2, characterized in that: An oil pump main shaft (8) is provided on the inner surface of the pump body (12), and an inner rotor (6) is provided on the outer surface of the oil pump main shaft (8).

4. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 3, characterized in that: The outer surface of the inner rotor (6) is provided with an outer rotor (5), and the inner surface of the inner rotor (6) is provided with a circular key (7).

5. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 4, characterized in that: An eccentric wheel (4) is provided on the outer surface of the outer rotor (5), and a limiting spring (3) is provided on the inner surface of the eccentric wheel (4).

6. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 5, characterized in that: A bearing (2) is installed on the outer surface of the oil pump main shaft (8) near the front side, and a large cover (1) is fixedly connected to the front surface of the pump body (12) by bolts.

7. The bidirectional cycloid pump with an independent pressure regulating mechanism according to claim 6, characterized in that: An oil seal (9) is provided on the rear side of the outer surface of the oil pump main shaft (8), and a retaining spring (10) is provided on the rear side of the outer surface of the oil pump main shaft (8).

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