Bidirectional cycloid pump with integrated pressure regulating mechanism

Abstract

The utility model belongs to the technical field of cycloid pumps, and particularly relates to a bidirectional cycloid pump with an integrated pressure regulating mechanism, which comprises a pump body, the pressure regulating mechanism is arranged at the top of the pump body, a sealing component is mounted on the side of the pressure regulating mechanism, an oil seal is clamped and connected in the pump body, a snap spring for a hole is tightly attached to the side of the oil seal, and the pressure regulating mechanism is arranged on the top of the pump body. The inner wall of the oil pump main shaft is connected with an inner rotor in a clamping manner, the outer wall of the inner rotor is connected with an outer rotor in a clamping manner, the side of the outer rotor is provided with an eccentric sleeve, and the inner part of the eccentric sleeve is connected with a steel ball in a clamping manner; one oil way in the original oil pump is changed into two oil ways, so that the output pressure of the oil pump is conveniently reduced, the internal pressure of the oil pump is effectively adjusted, the internal temperature of the oil pump is conveniently reduced, and the service life of the oil pump is prolonged.

Description

Technical Field

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

[0002] A cycloidal gear pump realizes oil suction and oil pressure by using the change of the sealed volume between teeth. It consists of a distribution plate, an outer rotor, and an inner rotor eccentrically arranged in the pump body, etc. The cycloidal gear pump has many advantages, such as compact structure, small volume, few parts, smooth movement, low noise, and relatively high volumetric efficiency.

[0003] In Chinese Patent No. 202320298801.5, a utility model discloses a bidirectional cycloidal gear pump, which includes a pump body, an inner rotor, an outer rotor, a pump shaft, an eccentric ring, a movable plate, and a pump cover. The pump body has a cavity, the inner rotor, the outer rotor, and the eccentric ring are arranged in the cavity, the pump shaft passes through the cavity, and the pump shaft is fixedly connected to the inner rotor. The pump cover covers the upper end of the cavity. The upper end faces of the inner rotor and the outer rotor are flush. The movable plate is arranged above the inner rotor and the outer rotor, and the outer diameter of the movable plate is larger than the outer diameter of the outer rotor. An elastic member is arranged at the lower end of the pump cover, and the elastic member makes the movable plate have a tendency to always press against the upper end faces of the inner rotor and the outer rotor; it can avoid the wear that may occur between the inner side of the pump cover and the inner rotor and the outer rotor, avoid reducing the self-suction force of the gear pump, and extend the service life of the gear pump.

[0004] The existing bidirectional cycloidal pump only realizes the characteristic function that the power transmission shaft rotates clockwise or counterclockwise, and the oil inlet and outlet always flow in one direction, and cannot meet the demand of some customers for adjustable pressure output by the oil pump. Moreover, during the high-speed operation of the existing bidirectional cycloidal pump, the internal pressure is too high, which easily leads to too high oil temperature, reduces the service life of the oil pump parts, and further reduces the overall service life of the oil pump.

[0005] Therefore, in view of the above problems, a bidirectional cycloidal pump with an integrated pressure regulating mechanism is proposed. Content of the Utility Model

[0006] In order to make up for the deficiencies of the prior art, the problems of difficult adjustment of the pressure output by the oil pump and the problem of too high oil temperature caused by too high pressure of the bidirectional cycloidal pump are solved.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A two-way cycloid pump with an integrated pressure regulating mechanism according to the present utility model includes a pump body. A pressure regulating mechanism is provided at the top of the pump body, and a sealing assembly is installed on the side of the pressure regulating mechanism. An oil seal is snap-fitted inside the pump body. A hole retaining ring is closely attached to the side of the oil seal, and an oil pump main shaft is snap-fitted inside the hole retaining ring. A round key is provided on the side of the oil pump main shaft. An inner rotor is snap-fitted on the outer wall of the oil pump main shaft, and an outer rotor is snap-fitted on the outer wall of the inner rotor. An eccentric sleeve is provided on the side of the outer rotor. A steel ball is snap-fitted inside the eccentric sleeve, and a limiting spring is elastically connected to the side of the steel ball. A large cover is provided on the other side of the limiting spring, and a screw is snap-fitted on the outer wall of the large cover.

[0008] Preferably, the pressure regulating mechanism includes a pressure regulating valve screw sleeve. A pressure regulating valve screw rod is snap-fitted inside the pressure regulating valve screw sleeve. A second O-ring is snap-fitted at one end of the pressure regulating valve screw rod, and a pressure regulating valve hex nut is snap-fitted at the other end of the pressure regulating valve screw rod. A first O-ring is snap-fitted on the outer wall of the pressure regulating valve screw sleeve. A pressure regulating valve spring is provided on the side of the pressure regulating valve screw sleeve, and a pressure regulating valve steel cap is snap-fitted on the other side of the pressure regulating valve spring.

[0009] Preferably, the pressure regulating valve screw sleeve and the pressure regulating valve screw rod form a snap-fitting structure, and the pressure regulating valve screw sleeve and the first O-ring form a snap-fitting structure.

[0010] Preferably, the pressure regulating valve screw rod and the second O-ring form a snap-fitting structure, and the pressure regulating valve screw rod and the pressure regulating valve hex nut form a snap-fitting structure.

[0011] Preferably, the pressure regulating valve screw sleeve and the pump body form a detachable structure, and the pressure regulating valve steel cap and the pressure regulating valve screw rod form an elastic structure through the pressure regulating valve spring.

[0012] Preferably, the sealing assembly includes a first plug. A first plug hole is snap-fitted at the bottom of the first plug. A second plug hole is provided on the side of the first plug hole, and a second plug is snap-fitted inside the second plug hole.

[0013] Preferably, the first plug and the first plug hole form a detachable structure, and the second plug and the second plug hole form a detachable structure.

[0014] Preferably, the oil pump main shaft and the pump body form a rotating structure, and the screw and the pump body form a detachable structure through the large cover.

[0015] The advantages of the present utility model are as follows:

[0016] 1. An oil pressure regulating mechanism is added to the original bi-directional cycloid pump, and the pump body structure of the original bi-directional cycloid pump is optimized. The oil pressure regulating mechanism can be directly installed on the pump body of the bi-directional cycloid pump.

[0017] 2. This oil pressure regulating mechanism can be directly installed on the pump body and integrated with the oil pump, saving installation space.

[0018] 3. This oil pressure regulating mechanism diverts part of the oil at the oil outlet to the oil circuit of the oil pressure regulating mechanism, changing the original one oil circuit inside the oil pump to two oil circuits. It 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 extend the service life of the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic three-dimensional structure diagram of the overall disassembly of the present invention;

[0021] Figure 2 Schematic three-dimensional structure diagram of the overall front view of the present invention;

[0022] Figure 3 Schematic cross-sectional structure diagram of the first oil circuit of the present invention;

[0023] Figure 4 Schematic cross-sectional structure diagram of the second oil circuit of the present invention;

[0024] Figure 5 Schematic disassembly structure diagram of the sealing component of the present invention;

[0025] Figure 6 Schematic cross-sectional structure diagram of the sealing component of the present invention.

[0026] In the figure: 1. Pump body; 2. Pressure regulating mechanism; 201. Pressure regulating valve screw sleeve; 202. Pressure regulating valve screw rod; 203. Second O-ring; 204. Pressure regulating valve hexagon nut; 205. First O-ring; 206. Pressure regulating valve spring; 207. Pressure regulating valve steel cap; 3. Sealing component; 301. First plug; 302. First plugged hole; 303. Second plugged hole; 304. Second plug; 4. Oil seal; 5. Hole retaining circlip; 6. Oil pump main shaft; 7. Round key; 8. Inner rotor; 9. Outer rotor; 10. Eccentric sleeve; 11. Steel ball; 12. Limiting spring; 13. Large cover; 14. Screw. Detailed implementation manners

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 4 shown, a two-way cycloid pump with an integrated pressure regulating mechanism includes a pump body 1. A pressure regulating mechanism 2 is provided at the top of the pump body 1, and a sealing assembly 3 is installed on the side of the pressure regulating mechanism 2. An oil seal 4 is snap-fitted inside the pump body 1. A hole retaining ring 5 is closely attached to the side of the oil seal 4. An oil pump main shaft 6 is snap-fitted inside the hole retaining ring 5. A round key 7 is provided on the side of the oil pump main shaft 6. An inner rotor 8 is snap-fitted on the outer wall of the oil pump main shaft 6. An outer rotor 9 is snap-fitted on the outer wall of the inner rotor 8. An eccentric sleeve 10 is provided on the side of the outer rotor 9. A steel ball 11 is snap-fitted inside the eccentric sleeve 10. A limiting spring 12 is elastically connected to the side of the steel ball 11. A large cover 13 is provided on the other side of the limiting spring 12. Screws 14 are snap-fitted on the outer wall of the large cover 13.

[0029] As Figure 5 、 Figure 6As shown in the figure, a two-way cycloid pump with an integrated pressure regulating mechanism, the pressure regulating mechanism 2 includes a pressure regulating valve screw sleeve 201. A pressure regulating valve screw rod 202 is snap-fitted inside the pressure regulating valve screw sleeve 201. One end of the pressure regulating valve screw rod 202 is snap-fitted with a second O-ring 203, and the other end of the pressure regulating valve screw rod 202 is snap-fitted with a pressure regulating valve hex nut 204. A first O-ring 205 is snap-fitted on the outer wall of the pressure regulating valve screw sleeve 201. A pressure regulating valve spring 206 is provided on the side of the pressure regulating valve screw sleeve 201, and the other side of the pressure regulating valve spring 206 is snap-fitted with a pressure regulating valve steel cap 207. Manually unscrew the pressure regulating valve hex nut 204, and then manually screw in and out the pressure regulating valve screw rod 202, so that the pressure regulating valve spring 206 is compressed and squeezes the pressure regulating valve steel cap 207. Manually screwing in and out controls the squeezing force of the spring. When the oil pressure at the oil outlet is greater than the squeezing force of the spring, the oil pressure pushes up the pressure regulating valve steel cap 207. Furthermore, the distance that the pressure regulating valve steel cap 207 is pushed up can be manually adjusted to control the flow rate of the second oil circuit and thus adjust the oil pressure inside the oil pump. The pressure regulating valve screw sleeve 201 and the pressure regulating valve screw rod 202 form a snap-fitting structure, and the pressure regulating valve screw sleeve 201 and the first O-ring 205 form a snap-fitting structure. The pressure regulating valve screw rod 202 and the second O-ring 203 form a snap-fitting structure, and the pressure regulating valve screw rod 202 and the pressure regulating valve hex nut 204 form a snap-fitting structure. The pressure regulating valve screw sleeve 201 and the pump body 1 form a detachable structure, and the pressure regulating valve steel cap 207 and the pressure regulating valve screw rod 202 form an elastic structure through the pressure regulating valve spring 206.

[0030] As Figure 1 shown in the figure, a two-way cycloid pump with an integrated pressure regulating mechanism, the sealing component 3 includes a first plug 301. A first plug hole 302 is snap-fitted at the bottom of the first plug 301. A second plug hole 303 is opened on the side of the first plug hole 302, and a second plug 304 is snap-fitted inside the second plug hole 303. The first plug 301 and the first plug hole 302 form a detachable structure, and the second plug 304 and the second plug hole 303 form a detachable structure.

[0031] As Figure 1 、 Figure 3 shown in the figure, a two-way cycloid pump with an integrated pressure regulating mechanism, the oil pump main shaft 6 and the pump body 1 form a rotating structure, and the screw 14 and the pump body 1 form a detachable structure through the big cover 13.

[0032] Working principle: First, after the oil pump is connected to the motor, the rotation of the motor drives the rotation of the main shaft 6 of the oil pump. The rotation of the main shaft 6 of the oil pump drives the rotation of the inner rotor 8, and the rotation of the inner rotor 8 drives the rotation of the outer rotor 9, thereby sucking the oil at the oil inlet and flowing out from the oil outlet, forming the first oil circuit. Then, after the pressure regulating mechanism 2 intervenes, the oil at the oil inlet reaches the oil outlet through the first oil circuit. When the oil pressure at the oil outlet reaches a certain value, the oil at the oil outlet lifts the pressure regulating valve steel cap 207 of the pressure regulating mechanism 2, and the second oil circuit is opened. 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, and then the internal pressure of the oil pump can be adjusted, reducing the temperature rise caused by the too high oil pressure during the high-speed operation of the oil pump, and improving the service life of the oil pump. Then, when the pressure regulating mechanism 2 is regulating the pressure, the operator manually unscrews the hexagonal nut 204 of the pressure regulating valve, and then manually screws in and out the screw rod 202 of the pressure regulating valve, so that the pressure regulating valve spring 206 is compressed and squeezes the pressure regulating valve steel cap 207. Manually screwing in and out controls the squeezing force of the spring. When the oil pressure at the oil outlet is greater than the squeezing force of the spring, the oil pressure lifts the pressure regulating valve steel cap 207. Furthermore, the distance by which the pressure regulating valve steel cap 207 is lifted can be manually adjusted, thereby controlling the flow rate of the second oil circuit and adjusting the internal oil pressure of the oil pump.

[0033] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A bidirectional cycloid pump with an integrated pressure regulating mechanism, characterized in that: The invention comprises a pump body (1), wherein a pressure regulating mechanism (2) is arranged on the top of the pump body (1), a sealing assembly (3) is installed on the side of the pressure regulating mechanism (2), and an oil seal (4) is connected to the inside of the pump body (1), a hole retaining spring (5) is tightly fitted to the side of the oil seal (4), and the inside of the hole retaining spring (5) is connected to the oil pump main shaft (6), and a round key (7) is arranged on the side of the oil pump main shaft (6), an inner rotor (8) is connected to the outer wall of the oil pump main shaft (6), and an outer rotor (9) is connected to the outer wall of the inner rotor (8), and an eccentric sleeve (10) is arranged on the side of the outer rotor (9), a steel ball (11) is connected to the inside of the eccentric sleeve (10), and the side of the steel ball (11) is elastically connected to a limit spring (12), a large cover (13) is arranged on the other side of the limit spring (12), and a screw (14) is connected to the outer wall of the large cover (13); The pressure regulating mechanism (2) comprises a pressure regulating valve screw sleeve (201), the interior of the pressure regulating valve screw sleeve (201) is snap-connected with a pressure regulating valve screw (202), one end of the pressure regulating valve screw (202) is snap-connected with a second O-ring (203), and the other end of the pressure regulating valve screw (202) is snap-connected with a pressure regulating valve hexagonal nut (204), the outer wall of the pressure regulating valve screw sleeve (201) is snap-connected with a first O-ring (205), a side of the pressure regulating valve screw sleeve (201) is provided with a pressure regulating valve spring (206), and the other side of the pressure regulating valve spring (206) is snap-connected with a pressure regulating valve steel cap (207).

2. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 1, characterized in that: The pressure regulating valve screw sleeve (201) and the pressure regulating valve screw rod (202) form a clamping structure, and the pressure regulating valve screw sleeve (201) and the first O-ring (205) form a clamping structure.

3. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 1, characterized in that: The pressure regulating valve screw (202) and the second O-ring (203) form a snap-fit ​​structure, and the pressure regulating valve screw (202) and the pressure regulating valve hexagonal nut (204) form a snap-fit ​​structure.

4. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 1, characterized in that: The pressure regulating valve screw sleeve (201) and the pump body (1) form a detachable structure, and the pressure regulating valve steel cap (207) forms an elastic structure with the pressure regulating valve screw rod (202) via the pressure regulating valve spring (206).

5. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 1, characterized in that: The sealing assembly (3) comprises a first plug (301), the bottom of the first plug (301) being snap-connected with a first blocking hole (302), a second blocking hole (303) being provided on the side of the first blocking hole (302), and a second plug (304) being snap-connected inside the second blocking hole (303).

6. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 5, characterized in that: The first plug (301) and the first blocking hole (302) form a detachable structure, and the second plug (304) and the second blocking hole (303) form a detachable structure.

7. A bidirectional cycloid pump with an integrated pressure regulating mechanism according to claim 1, characterized in that: The oil pump main shaft (6) and the pump body (1) form a rotating structure, and the screw (14) forms a detachable structure with the pump body (1) via the large cover (13).

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