A pump oil device

Abstract

The application discloses a pump oil device, which comprises an oil pump body assembly, an oil pump cover assembly, a rotor assembly, a valve assembly and a separation assembly. The oil pump body provided by the application provides an oil passage for the pump oil device in positive rotation, and the oil pump cover provides an oil passage for the pump oil device in reverse rotation. Compared with a conventional pump oil device, the pump oil device provided by the application can provide required flow and pressure for a hydraulic system in positive rotation and reverse rotation by controlling the left and right movement of a sliding valve, and the positive and reverse rotation of the pump oil device can be realized without other auxiliary mechanisms. The pump oil device has the advantages of compact structure, small space occupation and direct driving by a motor, and has forward-looking technical effects on realizing the light weight and intelligence of an automobile.

Description

Technical Field

[0001] This invention relates to the field of automotive hydraulic system technology, and more specifically to an oil pump device. Background Technology

[0002] Traditional automotive hydraulic systems use gear pumps or cycloidal pumps for power, with the engine driving the pump via a transmission mechanism to obtain the required flow and pressure. This type of traditional pump can only rotate in the forward direction and cannot rotate in the reverse direction.

[0003] With the development of new energy vehicle technology, especially the mature application of electric and hybrid electric vehicles, the hydraulic pumps in their hydraulic systems will be directly driven by a power motor. When the vehicle moves forward, the motor rotates in the forward direction; when the vehicle reverses or moves backward, the motor rotates in the reverse direction. Therefore, traditional oil pump devices, due to the aforementioned drawbacks, are not suitable for this type of hydraulic system directly driven by a power motor.

[0004] Existing technology utilizes a check valve to briefly reverse the oil pump and provide a small amount of lubricating oil under pressureless conditions. However, this pumping device can only provide lubricating oil for a short time and cannot provide the pressure and flow required by the hydraulic system for extended periods. This is particularly limiting in hydraulic systems that require prolonged reversal and the provision of pressure and flow under normal operating conditions. Summary of the Invention

[0005] The purpose of this invention is to provide an oil pumping device, comprising: an oil pump body assembly, an oil pump cover assembly, a rotor assembly, a valve assembly, and a separator assembly.

[0006] The oil pump body assembly includes an oil pump body and an oil pump body bushing.

[0007] The oil pump body is a combination of a cylinder and a rectangular block.

[0008] The top of the cylinder of the oil pump body is provided with a rotor cavity, and the rotor cavity is provided with a drive shaft bushing hole I, a forward rotation oil inlet passage, and a forward rotation oil outlet passage.

[0009] The drive shaft bushing hole I is located at the center of the rotor cavity.

[0010] The forward rotation oil inlet and outlet channels surround both sides of the rotor cavity, and the forward rotation oil inlet and outlet channels are connected.

[0011] A valve hole is provided on one side of the rectangular block of the oil pump body.

[0012] The top of the valve hole is provided with, in sequence from the valve opening inward, a control oil groove I, a reverse oil inlet groove I, an inlet groove I, a forward oil inlet groove, a reverse oil outlet groove I, an outlet groove I, a forward oil outlet groove, and a control oil groove II.

[0013] The forward rotation oil inlet tank and the forward rotation oil inlet passage are connected.

[0014] The intervals between the forward-rotating oil inlet, oil inlet I, and reverse-rotating oil inlet I are the same.

[0015] The forward rotation oil outlet tank and the forward rotation oil outlet channel are connected.

[0016] The intervals between the forward-rotating oil outlet trough, oil outlet trough I, and reverse-rotating oil outlet trough I are the same.

[0017] The intervals between the forward-rotating oil inlet trough, oil inlet trough I, and reverse-rotating oil inlet trough I are the same as the intervals between the forward-rotating oil outlet trough, oil outlet trough I, and reverse-rotating oil outlet trough I.

[0018] The valve orifice is provided with an oil inlet and an oil outlet at its front end.

[0019] The oil inlet is connected to the oil inlet tank I.

[0020] The oil outlet is connected to the oil outlet tank I.

[0021] The valve orifice has a plug-end valve chamber on the side closest to the valve opening and a spring-end valve chamber on the side furthest from the valve opening.

[0022] The control oil tank I is connected to the valve chamber at the end of the screw plug.

[0023] The control oil tank II is connected to the spring end valve chamber.

[0024] The top surface of the oil pump body is provided with several pin holes I and several screw holes I, and the pin holes I and screw holes I penetrate the upper and lower surfaces.

[0025] The oil pump body bushing is an annular bushing, which is placed inside the drive shaft bushing hole I.

[0026] The oil pump cover assembly includes an oil pump cover and an oil pump cover bushing.

[0027] The end face of the oil pump cover is provided with a drive shaft sleeve hole II corresponding to drive shaft sleeve hole I, a reverse oil outlet channel corresponding to forward rotation oil inlet channel, a reverse oil inlet channel corresponding to forward rotation oil outlet channel, a reverse oil inlet groove II corresponding to reverse rotation oil inlet groove I, a reverse oil outlet groove II corresponding to reverse rotation oil outlet groove I, a control oil groove III corresponding to control oil groove I, a control oil groove IV corresponding to control oil groove II, a pin hole II corresponding to pin hole I, and a screw hole II corresponding to screw hole I.

[0028] The reverse oil inlet channel and the reverse oil outlet channel are connected.

[0029] The reverse oil inlet channel and the reverse oil inlet tank II are connected.

[0030] The reverse oil outlet channel and the reverse oil outlet groove II are connected.

[0031] The control oil tank III is connected to the reverse oil outlet via the control oil passage I.

[0032] The control oil tank IV is connected to the reverse oil inlet via the control oil passage II.

[0033] The oil pump cover bushing is an annular bushing, which is placed inside the drive shaft bushing hole II.

[0034] The rotor assembly includes an outer rotor, an inner rotor, and a drive shaft.

[0035] The outer side of the outer rotor is a cylindrical structure, and its inner side meshes with the outer side of the inner rotor.

[0036] The inner side of the inner rotor is provided with a drive shaft hole I.

[0037] The middle part of the drive shaft is connected to the drive shaft hole I of the inner rotor.

[0038] The valve assembly includes a plug, a slide valve, and a spring.

[0039] The plug is located on one side of the valve assembly, and a spring is provided on the other side of the valve assembly.

[0040] The slide valve is an equally spaced slide valve, and one side of the slide valve is connected to a spring.

[0041] The interval of the slide valve is equal to the distance from the side of the oil inlet I closest to the reverse oil inlet I to the side of the forward oil inlet I furthest from the oil inlet I.

[0042] The separating component is a separating plate.

[0043] The end face of the partition component is provided with a drive shaft hole II corresponding to the drive shaft bushing hole I, an oil outlet corresponding to the forward rotation oil inlet, an oil inlet corresponding to the forward rotation oil outlet, an oil inlet groove II corresponding to the reverse rotation oil inlet groove I, an oil outlet groove II corresponding to the reverse rotation oil outlet groove I, a control oil groove V corresponding to the control oil groove I, a control oil groove VI corresponding to the control oil groove II, a pin hole III corresponding to the pin hole I, and a screw hole III corresponding to the screw hole I.

[0044] The inner rotor is placed inside the outer rotor, and the outer rotor is placed inside the rotor cavity of the oil pump body.

[0045] The drive shaft is sequentially inserted into the oil pump cover bushing, the drive shaft hole II of the separator assembly, the drive shaft hole I of the inner rotor, and the oil pump body bushing.

[0046] The spring of the valve assembly is placed in the spring end valve cavity of the oil pump body, and the slide valve is placed in the valve hole of the oil pump body. The valve hole of the oil pump body is sealed and the slide valve is limited by the screw plug.

[0047] The oil pump cover is placed on the end face of the separator assembly, and the separator assembly is placed on the top of the oil pump body.

[0048] The oil pump cover, the partition assembly, and the oil pump body are fixedly connected by locating pins and screws to form a sealed structure including an oil inlet and an oil outlet.

[0049] The forward-rotating oil inlet of the oil pump body, the oil outlet of the separator assembly, and the reverse-rotating oil outlet of the oil pump cover are connected.

[0050] The forward-rotating oil outlet of the oil pump body, the oil inlet of the separator assembly, and the reverse-rotating oil inlet of the oil pump cover are connected.

[0051] The reverse oil inlet groove I of the oil pump body, the oil inlet groove II of the separator assembly, and the reverse oil inlet groove II of the oil pump cover are connected.

[0052] The reverse oil outlet groove I of the oil pump body, the oil outlet groove II of the separator assembly, and the reverse oil outlet groove II of the oil pump cover are connected.

[0053] The control oil tank I of the oil pump body, the control oil tank V of the partition assembly, and the control oil tank III of the oil pump cover are connected.

[0054] The control oil tank II of the oil pump body, the control oil tank VI of the partition assembly, and the control oil tank IV of the oil pump cover are connected.

[0055] Furthermore, the rotor assembly also includes needle rollers.

[0056] The needle roller is located inside the drive shaft hole I of the inner rotor and is used to fix the drive shaft.

[0057] Furthermore, the rotor assembly also includes a retaining ring.

[0058] The retaining ring is located between the drive shaft and the drive shaft bore II of the separator assembly.

[0059] Furthermore, the valve assembly also includes an O-ring seal.

[0060] The O-ring is fitted into the annular groove of the screw plug.

[0061] Furthermore, the operating modes of the oil pump device include forward rotation mode and reverse rotation mode.

[0062] Furthermore, the working principle of the forward rotation mode is as follows:

[0063] When the oil pumping device starts working in the forward rotation, the slide valve moves towards the screw end valve chamber under the action of the spring. At this time, the hydraulic oil stored in the screw end valve chamber flows out from the control oil tank I. The outflowing hydraulic oil passes through the control oil tank V, the control oil tank III, and the control oil passage I in sequence before entering the reverse oil passage.

[0064] When the slide valve moves to the deepest part of the valve chamber at the screw plug end, the slide valve closes the reverse rotation oil circuit. The external power drives the drive shaft to rotate, and the drive shaft drives the inner rotor and outer rotor to pump oil. The hydraulic oil that enters the pumping device from the oil inlet passes through the oil inlet groove I, the forward rotation oil inlet groove, the forward rotation oil inlet passage, the forward rotation oil outlet passage, and the forward rotation oil outlet groove in sequence, and then flows out of the oil outlet from the oil outlet groove I.

[0065] Furthermore, the working principle of the reverse rotation mode is as follows:

[0066] When the oil pumping device starts working by rotating in reverse, the hydraulic oil stored in the spring end valve chamber flows out from the control oil tank II. The outflowing hydraulic oil passes through the control oil tank VI, control oil tank IV, and control oil passage II in sequence before entering the reverse oil inlet passage. Then, the oil is pumped by the inner rotor and outer rotor in sequence through the reverse oil outlet passage, control oil passage I, control oil tank III, control oil tank V, and control oil tank I before entering the screw end valve chamber.

[0067] When the pressure difference between the valve chamber at the screw end and the valve chamber at the spring end is greater than the spring force, the spool valve moves toward the valve chamber at the spring end. When the spool valve moves to the deepest part of the valve chamber at the spring end, the spool valve closes the forward rotation oil circuit. The hydraulic oil that enters the pumping device from the inlet passes through the inlet groove I, the reverse inlet groove I, the inlet groove II, and the reverse inlet groove II in sequence before entering the reverse inlet channel. Then, the oil is pumped by the inner rotor and the outer rotor and passes through the reverse outlet channel, the reverse outlet groove II, the outlet groove II, and the reverse outlet groove I in sequence before flowing out of the outlet from the outlet groove I.

[0068] Furthermore, the working principle of the reverse rotation mode is as follows:

[0069] When the oil pumping device starts working by rotating in reverse, the gas stored in the spring end valve chamber flows out from the control oil tank II. The gas flows out sequentially through the control oil tank VI, control oil tank IV, and control oil passage II before entering the reverse oil inlet passage. Then, the oil is pumped by the inner rotor and outer rotor sequentially through the reverse oil outlet passage, control oil passage I, control oil tank III, control oil tank V, and control oil tank I before entering the screw plug end valve chamber.

[0070] When the pressure difference between the valve chamber at the screw end and the valve chamber at the spring end is greater than the spring force, the spool valve moves toward the valve chamber at the spring end. When the spool valve moves to the deepest part of the valve chamber at the spring end, the spool valve closes the forward rotation oil circuit. The hydraulic oil that enters the pumping device from the inlet passes through the inlet groove I, the reverse inlet groove I, the inlet groove II, and the reverse inlet groove II in sequence before entering the reverse inlet channel. Then, the oil is pumped by the inner rotor and the outer rotor and passes through the reverse outlet channel, the reverse outlet groove II, the outlet groove II, and the reverse outlet groove I in sequence before flowing out of the outlet from the outlet groove I.

[0071] The technical effects of the present invention are beyond doubt. The oil pump body provided by the present invention provides an oil passage for the oil pumping device when rotating in the forward direction, and the oil pump cover provides an oil passage for the oil pumping device when rotating in the reverse direction.

[0072] Compared with traditional oil pumping devices, this invention can provide the required flow and pressure to the hydraulic system in both forward and reverse rotation by controlling the left and right movement of the slide valve, and can achieve forward and reverse operation of the oil pumping device without other auxiliary mechanisms.

[0073] This invention has a compact structure, occupies little space, and is directly driven by an electric motor, which has a forward-looking technical effect on realizing the lightweighting and intelligentization of automobiles. Attached Figure Description

[0074] Figure 1 This is a schematic diagram of the structure of the present invention;

[0075] Figure 2 This is a top view of the present invention;

[0076] Figure 3 This is a cross-sectional view of the valve assembly inside the oil pump device of the present invention;

[0077] Figure 4 This is a cross-sectional view of the rotor assembly inside the oil pumping device of the present invention;

[0078] Figure 5 This is a schematic diagram of the assembly structure of the present invention;

[0079] Figure 6 This is a schematic diagram of the oil pump body structure;

[0080] Figure 7 This is a schematic diagram of the oil pump cover structure;

[0081] Figure 8 This is a schematic diagram of the rotor assembly structure;

[0082] Figure 9 This is a schematic diagram of the valve body assembly structure;

[0083] Figure 10 This is a schematic diagram of the partition structure;

[0084] Figure 11 This is the oil circuit diagram when the oil pump unit rotates in the forward direction.

[0085] Figure 12 This is the oil circuit diagram when the oil pump unit rotates in the reverse direction.

[0086] In the figure, the components are: oil pump body assembly 1, oil pump body 11, rotor cavity 1101, drive shaft bushing hole I1102, forward rotation oil inlet 1103, forward rotation oil outlet 1104, forward rotation oil inlet groove 1105, forward rotation oil outlet groove 1106, reverse rotation oil inlet groove I1107, reverse rotation oil outlet groove I1108, oil inlet 1109, oil outlet 1110, valve hole 1111, control oil groove I1112, control oil groove II1113, plug end valve cavity 1114, spring end valve cavity 1115, oil inlet groove I1116, oil outlet groove I1117, pin hole I1118, screw hole I1119, oil pump body bushing 12, oil pump cover assembly 2, oil pump cover 21, drive shaft bushing hole II2102, reverse rotation oil inlet 2103, reverse rotation oil outlet 2104, and reverse rotation oil inlet groove II21. 07. Reverse oil outlet groove II 2108, control oil groove III 2112, control oil groove IV 2113, control oil passage I 2114, control oil passage II 2115, pin hole II 2118, screw hole II 2119, oil pump cover bushing 22, rotor assembly 3, outer rotor 31, inner rotor 32, drive shaft shaft hole I 321, drive shaft 33, needle roller 34, retaining ring 35, valve assembly 4, screw plug 41, O-ring seal 42, slide valve 43, spring 44, separator assembly 5, drive shaft shaft hole II 5102, oil inlet passage 5103, oil outlet passage 5104, oil inlet groove II 5107, oil outlet groove II 5108, control oil groove V 5112, control oil groove VI 5113, pin hole III 5118, screw hole III 5119, positioning pin 6, screw 7. Detailed Implementation

[0087] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0088] Example 1:

[0089] See Figures 1 to 12 An oil pumping device includes: an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3, a valve assembly 4, and a separator assembly 5.

[0090] The oil pump body assembly 1 includes an oil pump body 11 and an oil pump body bushing 12.

[0091] The oil pump body 11 is a combination of a cylinder and a rectangular block.

[0092] The top of the cylinder of the oil pump body 11 is provided with a rotor cavity 1101, and the rotor cavity 1101 is provided with a drive shaft bushing hole I1102, a forward rotation oil inlet passage 1103, and a forward rotation oil outlet passage 1104.

[0093] The drive shaft bushing hole I1102 is located at the center of the rotor cavity 1101.

[0094] The forward rotation oil inlet 1103 and the forward rotation oil outlet 1104 surround both sides of the rotor cavity 1101, and the forward rotation oil inlet 1103 and the forward rotation oil outlet 1104 are connected.

[0095] The rectangular block of the oil pump body 11 has a valve hole 1111 on one side facing inward.

[0096] The top of the valve hole 1111 is provided with the following in sequence from the valve port inward: control oil groove I1112, reverse oil inlet groove I1107, oil inlet groove I1116, forward oil inlet groove 1105, reverse oil outlet groove I1108, oil outlet groove I1117, forward oil outlet groove 1106, and control oil groove II1113.

[0097] The forward rotation oil inlet 1105 and the forward rotation oil inlet 1103 are connected.

[0098] The intervals between the forward-rotating oil inlet 1105, the oil inlet 11116, and the reverse-rotating oil inlet 11107 are the same.

[0099] The forward rotation oil outlet sump 1106 and the forward rotation oil outlet channel 1104 are connected.

[0100] The intervals between the forward-rotating oil outlet 1106, the oil outlet 11117, and the reverse-rotating oil outlet 11108 are the same.

[0101] The intervals between the forward-rotating oil inlet 1105, oil inlet 1116, and reverse-rotating oil inlet 11107 are the same as the intervals between the forward-rotating oil outlet 1106, oil outlet 11117, and reverse-rotating oil outlet 11108.

[0102] The valve hole 1111 has an oil inlet 1109 and an oil outlet 1110 at its front end.

[0103] The oil inlet 1109 is connected to the oil inlet tank I1116.

[0104] The oil outlet 1110 is connected to the oil outlet 1117.

[0105] The valve hole 1111 has a screw-end valve chamber 1114 on the side near the valve opening and a spring-end valve chamber 1115 on the side away from the valve opening.

[0106] The control oil tank I1112 is connected to the screw end valve chamber 1114.

[0107] The control oil tank II1113 is connected to the spring end valve chamber 1115.

[0108] The top surface of the oil pump body 11 is provided with a plurality of pin holes I1118 and a plurality of screw holes I1119, the pin holes I1118 and screw holes I1119 penetrating the upper and lower surfaces.

[0109] The oil pump body bushing 12 is an annular bushing, which is placed inside the drive shaft bushing hole I1102.

[0110] The oil pump cover assembly 2 includes an oil pump cover 21 and an oil pump cover bushing 22.

[0111] The end face of the oil pump cover 21 is provided with a drive shaft sleeve hole II2102 corresponding to the drive shaft sleeve hole I1102, a reverse oil outlet 2104 corresponding to the forward oil inlet 1103, a reverse oil inlet 2103 corresponding to the forward oil outlet 1104, a reverse oil inlet groove II2107 corresponding to the reverse oil inlet groove I1107, a reverse oil outlet groove II2108 corresponding to the reverse oil outlet groove I1108, a control oil groove III2112 corresponding to the control oil groove I1112, a control oil groove IV2113 corresponding to the control oil groove II1113, a pin hole II2118 corresponding to the pin hole I1118, and a screw hole II2119 corresponding to the screw hole I1119.

[0112] The reverse oil inlet channel 2103 and the reverse oil outlet channel 2104 are connected.

[0113] The reverse oil inlet channel 2103 and the reverse oil inlet groove II 2107 are connected.

[0114] The reverse oil outlet channel 2104 and the reverse oil outlet groove II 2108 are connected.

[0115] The control oil tank III2112 is connected to the reverse oil outlet 2104 via the control oil passage I2114.

[0116] The control oil tank IV2113 is connected to the reverse oil inlet 2103 via the control oil passage II2115.

[0117] The oil pump cover bushing 22 is an annular bushing, which is placed inside the drive shaft bushing hole II2102.

[0118] The rotor assembly 3 includes an outer rotor 31, an inner rotor 32, and a drive shaft 33.

[0119] The outer side of the outer rotor 31 is a cylindrical structure, and its inner side meshes with the outer side of the inner rotor 32.

[0120] The inner rotor 32 has a drive shaft hole I321 on its inner side.

[0121] The middle part of the drive shaft 33 is connected to the drive shaft hole I321 of the inner rotor 32.

[0122] The valve assembly 4 includes a screw plug 41, a slide valve 43, and a spring 44.

[0123] The screw plug 41 is located on one side of the valve assembly 4, and a spring 44 is provided on the other side of the valve assembly 4.

[0124] The slide valve 43 is an equally spaced slide valve, and one side of the slide valve 43 is connected to the spring 44.

[0125] The interval of the slide valve 43 is equal to the distance from the side of the oil inlet groove I1116 near the reverse oil inlet groove I1107 to the side of the forward oil inlet groove 1105 away from the oil inlet groove I1116.

[0126] The separating component 5 is a separating plate.

[0127] The end face of the partition component 5 is provided with a drive shaft hole II5102 corresponding to the drive shaft bushing hole I1102, an oil outlet 5104 corresponding to the forward rotation oil inlet 1103, an oil inlet 5103 corresponding to the forward rotation oil outlet 1104, an oil inlet groove II5107 corresponding to the reverse rotation oil inlet groove I1107, an oil outlet groove II5108 corresponding to the reverse rotation oil outlet groove I1108, a control oil groove V5112 corresponding to the control oil groove I1112, a control oil groove VI5113 corresponding to the control oil groove II1113, a pin hole III5118 corresponding to the pin hole I1118, and a screw hole III5119 corresponding to the screw hole I1119.

[0128] The inner rotor 32 is placed inside the outer rotor 31, and the outer rotor 31 is placed inside the rotor cavity 1101 of the oil pump body 11.

[0129] The drive shaft 33 is sequentially inserted into the oil pump cover bushing 22, the drive shaft hole II5102 of the separator component 5, the drive shaft hole I321 of the inner rotor 32, and the oil pump body bushing 12.

[0130] The spring 44 of the valve assembly 4 is placed in the spring end valve cavity 1115 of the oil pump body 11, and the slide valve 43 is placed in the valve hole 1111 of the oil pump body 11. The valve hole 1111 of the oil pump body 11 is blocked by the screw plug 41 and the slide valve 43 is limited.

[0131] The oil pump cover 21 is placed on the end face of the separator component 5, and the separator component 5 is placed on the top of the oil pump body 11.

[0132] The oil pump cover 21, the partition assembly 5, and the oil pump body 11 are fixedly connected by the positioning pin 6 and the screw 7 to form a sealed structure including an oil inlet 1109 and an oil outlet 1110.

[0133] The forward-rotating oil inlet 1103 of the oil pump body 11, the oil outlet 5104 of the separator 5, and the reverse-rotating oil outlet 2104 of the oil pump cover 21 are connected.

[0134] The forward-rotating oil outlet 1104 of the oil pump body 11, the oil inlet 5103 of the separator 5, and the reverse-rotating oil inlet 2103 of the oil pump cover 21 are connected.

[0135] The reverse oil inlet groove I1107 of the oil pump body 11, the oil inlet groove II5107 of the separator component 5, and the reverse oil inlet groove II2107 of the oil pump cover 21 are connected.

[0136] The reverse oil outlet groove I1108 of the oil pump body 11, the oil outlet groove II5108 of the separator component 5, and the reverse oil outlet groove II2108 of the oil pump cover 21 are connected.

[0137] The control oil tank I1112 of the oil pump body 11, the control oil tank V5112 of the partition component 5, and the control oil tank III2112 of the oil pump cover 21 are connected.

[0138] The control oil tank II1113 of the oil pump body 11, the control oil tank VI5113 of the partition component 5, and the control oil tank IV2113 of the oil pump cover 21 are connected.

[0139] Example 2:

[0140] An oil pumping device, the main technical contents of which are described in Embodiment 1, further wherein the rotor assembly 3 also includes a needle roller 34.

[0141] The needle roller 34 is located inside the drive shaft hole I321 of the inner rotor 32 and is used to fix the drive shaft 33.

[0142] Example 3:

[0143] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 2, further wherein the rotor assembly 3 also includes a retaining ring 35.

[0144] The retaining ring 35 is located between the drive shaft 33 and the drive shaft hole II5102 of the separator assembly 5.

[0145] Example 4:

[0146] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 3, further wherein the valve assembly 4 also includes an O-ring seal 42.

[0147] The O-ring 42 is fitted into the annular groove of the screw plug 41.

[0148] Example 5:

[0149] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 4, further wherein the working mode of the oil pumping device includes a forward rotation mode and a reverse rotation mode.

[0150] Example 6:

[0151] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 5, further wherein the working principle of the forward rotation mode is as follows:

[0152] When the oil pumping device starts to work in the forward rotation, the slide valve 43 moves towards the screw end valve chamber 1114 under the action of the spring 44. At this time, the hydraulic oil stored in the screw end valve chamber 1114 flows out from the control oil groove I1112. The outflowing hydraulic oil passes through the control oil groove V5112, the control oil groove III2112, and the control oil passage I2114 in sequence before entering the reverse oil passage 2104.

[0153] When the slide valve 43 moves to the deepest part of the valve chamber 1114 at the end of the screw plug, the slide valve 43 closes the reverse rotation oil circuit. The external power drives the drive shaft 33 to rotate. The drive shaft 33 drives the inner rotor 32 and the outer rotor 31 to pump oil. The hydraulic oil that enters the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the forward rotation oil inlet groove 1105, the forward rotation oil inlet passage 1103, the forward rotation oil outlet passage 1104, and the forward rotation oil outlet groove 1106 in sequence, and then flows out of the oil outlet 1110 from the oil outlet groove I1117.

[0154] Example 7:

[0155] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 6, further wherein the working principle of the reverse rotation mode is as follows:

[0156] When the oil pumping device starts working by rotating in reverse, the hydraulic oil stored in the spring end valve chamber 1115 flows out from the control oil tank II 1113. The outflowing hydraulic oil passes through the control oil tank VI 5 113, the control oil tank IV 2113, and the control oil passage II 2115 in sequence before entering the reverse oil inlet passage 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31, passing through the reverse oil outlet passage 2104, the control oil passage I 2114, the control oil tank III 2112, the control oil tank V 5 112, and the control oil tank I 1112 in sequence before entering the screw end valve chamber 1114.

[0157] When the pressure difference between the plug end valve chamber 1114 and the spring end valve chamber 1115 is greater than the elastic force of the spring 44, the slide valve 43 moves towards the spring end valve chamber 1115. When the slide valve 43 moves to the deepest part of the spring end valve chamber 1115, the slide valve 43 closes the forward rotation oil circuit. The hydraulic oil entering the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the reverse oil inlet groove I1107, the oil inlet groove II5107, and the reverse oil inlet groove II2107 in sequence before entering the reverse oil inlet channel 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 and passes through the reverse oil outlet channel 2104, the reverse oil outlet groove II2108, the oil outlet groove II5108, and the reverse oil outlet groove I1108 in sequence before flowing out of the oil outlet port 1110 from the oil outlet groove I1117.

[0158] Example 8:

[0159] An oil pumping device, the main technical contents of which are described in any one of Embodiments 1 to 7, further wherein the working principle of the reverse rotation mode is as follows:

[0160] When the oil pumping device starts working by rotating in reverse, the gas stored in the spring end valve chamber 1115 flows out from the control oil tank II 1113. The gas flows out sequentially through the control oil tank VI 5 113, the control oil tank IV 2113, and the control oil passage II 2115 before entering the reverse oil inlet passage 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 sequentially through the reverse oil outlet passage 2104, the control oil passage I 2114, the control oil tank III 2112, the control oil tank V 5 112, and the control oil tank I 1112 before entering the screw end valve chamber 1114.

[0161] When the pressure difference between the plug end valve chamber 1114 and the spring end valve chamber 1115 is greater than the elastic force of the spring 44, the slide valve 43 moves towards the spring end valve chamber 1115. When the slide valve 43 moves to the deepest part of the spring end valve chamber 1115, the slide valve 43 closes the forward rotation oil circuit. The hydraulic oil entering the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the reverse oil inlet groove I1107, the oil inlet groove II5107, and the reverse oil inlet groove II2107 in sequence before entering the reverse oil inlet channel 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 and passes through the reverse oil outlet channel 2104, the reverse oil outlet groove II2108, the oil outlet groove II5108, and the reverse oil outlet groove I1108 in sequence before flowing out of the oil outlet port 1110 from the oil outlet groove I1117.

[0162] Example 9:

[0163] See Figures 1 to 12 An oil pumping device includes: an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3, a valve assembly 4, and a separator assembly 5.

[0164] The oil pump body assembly 1 includes an oil pump body 11 and an oil pump body bushing 12.

[0165] The main component of the oil pump body assembly is the oil pump body, whose main function is to provide an oil passage for the oil pumping device during forward rotation.

[0166] The oil pump body 11 is a combination of a cylinder and a rectangular block.

[0167] The top of the cylinder of the oil pump body 11 is provided with a rotor cavity 1101, and the rotor cavity 1101 is provided with a drive shaft bushing hole I1102, a forward rotation oil inlet passage 1103, and a forward rotation oil outlet passage 1104.

[0168] The drive shaft bushing hole I1102 is located at the center of the rotor cavity 1101.

[0169] The forward rotation oil inlet 1103 and the forward rotation oil outlet 1104 surround both sides of the rotor cavity 1101, and the forward rotation oil inlet 1103 and the forward rotation oil outlet 1104 are connected.

[0170] The rectangular block of the oil pump body 11 has a valve hole 1111 on one side facing inward.

[0171] The top of the valve hole 1111 is provided with the following in sequence from the valve port inward: control oil groove I1112, reverse oil inlet groove I1107, oil inlet groove I1116, forward oil inlet groove 1105, reverse oil outlet groove I1108, oil outlet groove I1117, forward oil outlet groove 1106, and control oil groove II1113.

[0172] The forward rotation oil inlet 1105 and the forward rotation oil inlet 1103 are connected.

[0173] The intervals between the forward-rotating oil inlet 1105, the oil inlet 11116, and the reverse-rotating oil inlet 11107 are the same.

[0174] The forward rotation oil outlet sump 1106 and the forward rotation oil outlet channel 1104 are connected.

[0175] The intervals between the forward-rotating oil outlet 1106, the oil outlet 11117, and the reverse-rotating oil outlet 11108 are the same.

[0176] The intervals between the forward-rotating oil inlet 1105, oil inlet 1116, and reverse-rotating oil inlet 11107 are the same as the intervals between the forward-rotating oil outlet 1106, oil outlet 11117, and reverse-rotating oil outlet 11108.

[0177] The valve hole 1111 has an oil inlet 1109 and an oil outlet 1110 at its front end.

[0178] The oil inlet 1109 is connected to the oil inlet tank I1116.

[0179] The oil outlet 1110 is connected to the oil outlet 1117.

[0180] The valve hole 1111 has a screw-end valve chamber 1114 on the side near the valve opening and a spring-end valve chamber 1115 on the side away from the valve opening.

[0181] The control oil tank I1112 is connected to the screw end valve chamber 1114.

[0182] The control oil tank II1113 is connected to the spring end valve chamber 1115.

[0183] The top surface of the oil pump body 11 is provided with a plurality of pin holes I1118 and a plurality of screw holes I1119, the pin holes I1118 and screw holes I1119 penetrating the upper and lower surfaces.

[0184] The oil pump body bushing 12 is an annular bushing, which is placed inside the drive shaft bushing hole I1102.

[0185] The oil pump cover assembly 2 includes an oil pump cover 21 and an oil pump cover bushing 22.

[0186] The main component of the oil pump cover assembly is the oil pump cover, whose main function is to provide an oil passage for the oil pumping device during reverse rotation.

[0187] The end face of the oil pump cover 21 is provided with a drive shaft sleeve hole II2102 corresponding to the drive shaft sleeve hole I1102, a reverse oil outlet 2104 corresponding to the forward oil inlet 1103, a reverse oil inlet 2103 corresponding to the forward oil outlet 1104, a reverse oil inlet groove II2107 corresponding to the reverse oil inlet groove I1107, a reverse oil outlet groove II2108 corresponding to the reverse oil outlet groove I1108, a control oil groove III2112 corresponding to the control oil groove I1112, a control oil groove IV2113 corresponding to the control oil groove II1113, a pin hole II2118 corresponding to the pin hole I1118, and a screw hole II2119 corresponding to the screw hole I1119.

[0188] The reverse oil inlet channel 2103 and the reverse oil outlet channel 2104 are connected.

[0189] The reverse oil inlet channel 2103 and the reverse oil inlet groove II 2107 are connected.

[0190] The reverse oil outlet channel 2104 and the reverse oil outlet groove II 2108 are connected.

[0191] The control oil tank III2112 is connected to the reverse oil outlet 2104 via the control oil passage I2114.

[0192] The control oil tank IV2113 is connected to the reverse oil inlet 2103 via the control oil passage II2115.

[0193] The oil pump cover bushing 22 is an annular bushing, which is placed inside the drive shaft bushing hole II2102.

[0194] The rotor assembly 3 includes an outer rotor 31, an inner rotor 32, and a drive shaft 33.

[0195] The outer side of the outer rotor 31 is a cylindrical structure, and its inner side meshes with the outer side of the inner rotor 32.

[0196] The inner rotor 32 has a drive shaft hole I321 on its inner side.

[0197] The middle part of the drive shaft 33 is connected to the drive shaft hole I321 of the inner rotor 32.

[0198] The valve assembly 4 includes a screw plug 41, a slide valve 43, and a spring 44.

[0199] The screw plug 41 is located on one side of the valve assembly 4, and a spring 44 is provided on the other side of the valve assembly 4.

[0200] The slide valve 43 is an equally spaced slide valve, and one side of the slide valve 43 is connected to the spring 44 for resetting the slide valve when rotating in the forward direction.

[0201] The interval of the slide valve 43 is equal to the distance from the side of the oil inlet groove I1116 near the reverse oil inlet groove I1107 to the side of the forward oil inlet groove 1105 away from the oil inlet groove I1116.

[0202] The separating component 5 is a separating plate.

[0203] The end face of the partition component 5 is provided with a drive shaft hole II5102 corresponding to the drive shaft bushing hole I1102, an oil outlet 5104 corresponding to the forward rotation oil inlet 1103, an oil inlet 5103 corresponding to the forward rotation oil outlet 1104, an oil inlet groove II5107 corresponding to the reverse rotation oil inlet groove I1107, an oil outlet groove II5108 corresponding to the reverse rotation oil outlet groove I1108, a control oil groove V5112 corresponding to the control oil groove I1112, a control oil groove VI5113 corresponding to the control oil groove II1113, a pin hole III5118 corresponding to the pin hole I1118, and a screw hole III5119 corresponding to the screw hole I1119.

[0204] The inner rotor 32 is placed inside the outer rotor 31, and the outer rotor 31 is placed inside the rotor cavity 1101 of the oil pump body 11.

[0205] The drive shaft 33 is sequentially inserted into the oil pump cover bushing 22, the drive shaft hole II5102 of the separator component 5, the drive shaft hole I321 of the inner rotor 32, and the oil pump body bushing 12.

[0206] The spring 44 of the valve assembly 4 is placed in the spring end valve cavity 1115 of the oil pump body 11, and the slide valve 43 is placed in the valve hole 1111 of the oil pump body 11. The valve hole 1111 of the oil pump body 11 is blocked by the screw plug 41 and the slide valve 43 is limited.

[0207] The plug is connected to the valve hole end of the oil pump body with the control oil groove I end, and is used to limit the position of the slide valve when rotating in the forward direction, and cooperates with the O-ring to form an end face seal.

[0208] The valve assembly is installed in the valve hole of the oil pump body, and controls the movable slide valve to switch the oil passage when rotating in the forward and reverse directions.

[0209] The oil pump cover 21 is placed on the end face of the separator component 5, and the separator component 5 is placed on the top of the oil pump body 11.

[0210] The oil pump cover is mounted on the oil pump body. It is connected to the oil pump body in the middle by a partition plate.

[0211] The oil pump cover 21, the partition assembly 5, and the oil pump body 11 are fixedly connected by the positioning pin 6 and the screw 7 to form a sealed structure including an oil inlet 1109 and an oil outlet 1110.

[0212] The forward-rotating oil inlet 1103 of the oil pump body 11, the oil outlet 5104 of the separator 5, and the reverse-rotating oil outlet 2104 of the oil pump cover 21 are connected.

[0213] The forward-rotating oil outlet 1104 of the oil pump body 11, the oil inlet 5103 of the separator 5, and the reverse-rotating oil inlet 2103 of the oil pump cover 21 are connected.

[0214] The reverse oil inlet groove I1107 of the oil pump body 11, the oil inlet groove II5107 of the separator component 5, and the reverse oil inlet groove II2107 of the oil pump cover 21 are connected.

[0215] The reverse oil outlet groove I1108 of the oil pump body 11, the oil outlet groove II5108 of the separator component 5, and the reverse oil outlet groove II2108 of the oil pump cover 21 are connected.

[0216] The control oil tank I1112 of the oil pump body 11, the control oil tank V5112 of the partition component 5, and the control oil tank III2112 of the oil pump cover 21 are connected.

[0217] The control oil tank II1113 of the oil pump body 11, the control oil tank VI5113 of the partition component 5, and the control oil tank IV2113 of the oil pump cover 21 are connected.

[0218] Example 10:

[0219] An oil pumping device, the main technical contents of which are described in Embodiment 9, further wherein the rotor assembly 3 also includes a needle roller 34.

[0220] The needle roller 34 is located inside the drive shaft hole I321 of the inner rotor 32 and is used to fix the drive shaft 33.

[0221] Example 11:

[0222] An oil pumping device, the main technical contents of which are described in any one of Embodiments 9 to 10, further wherein the rotor assembly 3 also includes a retaining ring 35.

[0223] The retaining ring 35 is located between the drive shaft 33 and the drive shaft hole II5102 of the separator assembly 5.

[0224] Example 12:

[0225] An oil pumping device, the main technical contents of which are described in any one of embodiments 9 to 11, further wherein the valve assembly 4 also includes an O-ring seal 42.

[0226] The O-ring 42 is fitted into the annular groove of the screw plug 41.

[0227] Example 13:

[0228] An oil pumping device, the main technical contents of which are described in any one of Embodiments 9 to 12, further wherein the working mode of the oil pumping device includes a forward rotation mode and a reverse rotation mode.

[0229] Example 14:

[0230] An oil pumping device, the main technical contents of which are described in any one of Embodiments 9 to 13, further wherein the working principle of the forward rotation mode is as follows:

[0231] When the oil pumping device starts to work in the forward rotation, the slide valve 43 moves towards the screw end valve chamber 1114 under the action of the spring 44. At this time, the hydraulic oil stored in the screw end valve chamber 1114 flows out from the control oil groove I1112. The outflowing hydraulic oil passes through the control oil groove V5112, the control oil groove III2112, and the control oil passage I2114 in sequence before entering the reverse oil passage 2104.

[0232] When the slide valve 43 moves to the deepest part of the valve chamber 1114 at the end of the screw plug, the slide valve 43 closes the reverse rotation oil circuit. The external power drives the drive shaft 33 to rotate. The drive shaft 33 drives the inner rotor 32 and the outer rotor 31 to pump oil. The hydraulic oil that enters the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the forward rotation oil inlet groove 1105, the forward rotation oil inlet passage 1103, the forward rotation oil outlet passage 1104, and the forward rotation oil outlet groove 1106 in sequence, and then flows out of the oil outlet 1110 from the oil outlet groove I1117.

[0233] The oil pumping unit operates in a forward rotation. When the reverse rotation of the oil pumping unit ends, the spool valve moves to the right under the action of the spring (spring returns to its original position). The hydraulic oil stored in valve chamber I at the screw end flows sequentially through the oil pump body control oil groove I, the partition plate control oil groove III, the oil pump cover control oil groove II, and the oil pump cover control oil passage II, finally being discharged and depressurized through the oil pump cover inlet passage II. When the spool valve moves to the right end, it closes the oil inlet groove I' and outlet groove I' during the reverse rotation of the oil pump body (the oil circuit layout during reverse rotation is on the oil pump cover). External power drives the drive shaft to rotate, which in turn drives the inner and outer rotors to pump oil. Hydraulic oil in the forward rotation oil circuit enters from the inlet port and flows sequentially through the valve hole, oil pump body inlet groove I, inlet passage I, outlet passage I, oil pump body outlet groove I, and valve hole, finally flowing out through the outlet port. This process is mainly completed within the oil pump body assembly and the spool valve assembly.

[0234] Example 15:

[0235] An oil pumping device, the main technical contents of which are described in any one of Embodiments 9 to 14, further wherein the working principle of the reverse rotation mode is as follows:

[0236] When the oil pumping device starts working by rotating in reverse, the hydraulic oil stored in the spring end valve chamber 1115 flows out from the control oil tank II 1113. The outflowing hydraulic oil passes through the control oil tank VI 5 113, the control oil tank IV 2113, and the control oil passage II 2115 in sequence before entering the reverse oil inlet passage 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31, passing through the reverse oil outlet passage 2104, the control oil passage I 2114, the control oil tank III 2112, the control oil tank V 5 112, and the control oil tank I 1112 in sequence before entering the screw end valve chamber 1114.

[0237] When the pressure difference between the plug end valve chamber 1114 and the spring end valve chamber 1115 is greater than the elastic force of the spring 44, the slide valve 43 moves towards the spring end valve chamber 1115. When the slide valve 43 moves to the deepest part of the spring end valve chamber 1115, the slide valve 43 closes the forward rotation oil circuit. The hydraulic oil entering the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the reverse oil inlet groove I1107, the oil inlet groove II5107, and the reverse oil inlet groove II2107 in sequence before entering the reverse oil inlet channel 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 and passes through the reverse oil outlet channel 2104, the reverse oil outlet groove II2108, the oil outlet groove II5108, and the reverse oil outlet groove I1108 in sequence before flowing out of the oil outlet port 1110 from the oil outlet groove I1117.

[0238] The reverse rotation operation of the oil pumping device consists of two stages. The first stage involves the movement of the slide valve, which closes the forward rotation oil circuit in the pump body and opens the reverse rotation oil circuit. As the pumping device begins its reverse rotation, the hydraulic oil (or gas—when there is no liquid) stored in the spring-end valve chamber II is drawn out by the pumping device and flows successively through the pump body control oil tank I', the partition control oil tank III', the pump cover control oil tank II', the control oil passage II', and the outlet passage II. It then enters the pump cover inlet passage II, control oil passage II, and control oil tank II via the inner and outer rotors, enters the partition control oil tank III, enters the pump body control oil tank I, and finally enters the screw-end valve chamber I. At this time, a pressure difference is formed between valve chamber II and valve chamber I. When the pressure difference exceeds the spring force, the slide valve moves to the left, closing the forward rotation oil circuit and opening the reverse rotation oil circuit. The second stage is the reverse rotation pumping stage. Hydraulic oil in the reverse-rotating oil circuit flows through the pump body inlet, pump body inlet groove I', partition plate inlet groove III', pump cover inlet groove II', pump cover outlet passage II, pump cover inlet passage II, partition plate outlet groove III', and pump body outlet groove II, finally flowing out from the outlet and providing the pressure and flow required for the operating conditions. This process is mainly completed within the pump cover assembly and the spool valve assembly.

[0239] Example 16:

[0240] An oil pumping device, the main technical contents of which are described in any one of Embodiments 9 to 15, further wherein the working principle of the reverse rotation mode is as follows:

[0241] When the oil pumping device starts working by rotating in reverse, the gas stored in the spring end valve chamber 1115 flows out from the control oil tank II 1113. The gas flows out sequentially through the control oil tank VI 5 113, the control oil tank IV 2113, and the control oil passage II 2115 before entering the reverse oil inlet passage 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 sequentially through the reverse oil outlet passage 2104, the control oil passage I 2114, the control oil tank III 2112, the control oil tank V 5 112, and the control oil tank I 1112 before entering the screw end valve chamber 1114.

[0242] When the pressure difference between the plug end valve chamber 1114 and the spring end valve chamber 1115 is greater than the elastic force of the spring 44, the slide valve 43 moves towards the spring end valve chamber 1115. When the slide valve 43 moves to the deepest part of the spring end valve chamber 1115, the slide valve 43 closes the forward rotation oil circuit. The hydraulic oil entering the pumping device from the oil inlet 1109 passes through the oil inlet groove I1116, the reverse oil inlet groove I1107, the oil inlet groove II5107, and the reverse oil inlet groove II2107 in sequence before entering the reverse oil inlet channel 2103. Then, the oil is pumped by the inner rotor 32 and the outer rotor 31 and passes through the reverse oil outlet channel 2104, the reverse oil outlet groove II2108, the oil outlet groove II5108, and the reverse oil outlet groove I1108 in sequence before flowing out of the oil outlet port 1110 from the oil outlet groove I1117.

[0243] Example 17:

[0244] See Figures 1 to 12 An oil pumping device, the main technical contents of which are as follows:

[0245] An oil pumping device, see Figures 1 to 5 It includes an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3, a valve assembly 4, and a partition assembly 5.

[0246] See Figure 6 , Figure 11 , Figure 12 The main component of the oil pump body assembly 1 is the oil pump body 11. Its main function is to provide an oil passage for the oil pumping device during forward rotation.

[0247] A rotor cavity 1101 is formed on the end face of the oil pump body 11. A drive shaft sleeve hole I1102 is formed at the center of the bottom of the rotor cavity 1101. A forward rotation oil inlet passage I1103 and a forward rotation oil outlet passage I1104 are formed around the drive shaft sleeve hole I1102 at the bottom of the rotor cavity 1101.

[0248] The oil pump body 11 has a forward rotation oil inlet groove I1105 and a forward rotation oil outlet groove I1106 on its end face. The forward rotation oil inlet groove I1105 is connected to the forward rotation oil inlet passage I1103, and the forward rotation oil outlet groove I1106 is connected to the forward rotation oil outlet passage I1104.

[0249] The end face of the oil pump body has a reverse oil inlet groove I1107 and a reverse oil outlet groove I1108 when the oil pump device rotates in the opposite direction.

[0250] The oil pump body 11 has an oil inlet 1109 and an oil outlet 1110 on its side end face.

[0251] The oil pump body 11 has a valve hole 1111. The oil inlet 1109 is connected to the forward-rotating oil inlet groove I1105 at one end through the valve hole 1111, and to the reverse-rotating oil inlet groove I1107 at the other end. The oil outlet 1110 is connected to the forward-rotating oil outlet groove I106 at one end through the valve hole 1111, and to the reverse-rotating oil outlet groove I1108 at the other end.

[0252] The oil pump body 11 has a control oil groove I1112 and a control oil groove II1113 on its end face. The control oil groove I1112 is connected to the screw end valve chamber 1114, and the control oil groove II1113 is connected to the spring end valve chamber 1115.

[0253] See Figure 7 The main component of the oil pump cover assembly 2 is the oil pump cover 21, whose main function is to provide an oil passage for the oil pumping device when it rotates in the opposite direction.

[0254] The end face of the oil pump cover 21 is provided with a drive shaft bushing hole II 2102 that is adapted to the drive shaft bushing hole I 1102 of the oil pump body 11. The end face of the oil pump cover 11 is provided with a reverse oil outlet 2104 and a reverse oil inlet 2103 that are adapted to the forward rotation oil inlet 1103 and the forward rotation oil outlet 1104 of the oil pump body, respectively.

[0255] The end face of the oil pump cover 21 is provided with a reverse oil inlet groove II 2107 and a reverse oil outlet groove II 2108 when the oil pump device rotates in the opposite direction. The reverse oil inlet groove II 2107 is connected to the reverse oil inlet passage 2103 and is compatible with the reverse oil inlet groove I 1107 on the oil pump body. The reverse oil outlet groove II 2108 is connected to the reverse oil outlet passage 2104 and is compatible with the reverse oil outlet groove I 1108 on the oil pump body.

[0256] The oil pump cover 21 has a control oil groove III 2112 and a control oil groove IV 2113 on its end face. The control oil groove III 2112 is compatible with the control oil groove I 1112 on the oil pump body. The control oil groove IV 2113 is compatible with the control oil groove II 1113 on the oil pump body.

[0257] The oil pump cover 21 has control oil passages I2114 and II2115 on its end face. One end of control oil passage I2114 is connected to control oil tank III2112, and the other end is connected to reverse oil outlet passage 2104. Control oil passage II2115 is connected to control oil tank IV2113, and the other end is connected to reverse oil inlet passage 2103.

[0258] The oil pump cover 21 is mounted on the oil pump body 11. It is connected to the oil pump body 11 in the middle through a partition assembly 5.

[0259] See Figure 8The rotor assembly 3 mainly includes an outer rotor 31, an inner rotor 32, and a drive shaft 33.

[0260] The outer rotor 31 is located inside the rotor cavity 1101 of the oil pump body 11. The inner rotor 32 is located inside the outer rotor 31 and meshes with the outer rotor 31.

[0261] The drive shaft 33 is connected in the middle of the inner rotor 31. One end of the drive shaft 33 is installed in the drive shaft sleeve hole I1102 of the oil pump body 11, and the other end passes through the drive shaft sleeve hole II2102 of the oil pump cover 21.

[0262] See Figure 9 The valve assembly 4 includes a slide valve 43, a spring 44, an O-ring seal 42, and a screw plug 41.

[0263] The valve assembly 4 is installed in the valve hole 1111 of the oil pump body 11, and controls the movable slide valve 43 to switch the oil passage when rotating in the forward and reverse directions.

[0264] The spring 44 is mounted on the valve hole end of the oil pump body 11 with the control oil groove II1113 and is connected to the slide valve 43 for resetting the slide valve 43 when rotating in the forward direction.

[0265] The O-ring 42 is fitted into the annular groove of the screw plug 41.

[0266] The screw plug 41 is connected to the valve hole end of the oil pump body 11 with the control oil groove I1112, and is used to limit the position of the slide valve 43 when rotating in the forward direction, and cooperates with the O-ring seal 42 to form an end face seal.

[0267] See Figure 10 The separating component 5 is used to separate the oil passages during forward rotation and reverse rotation.

[0268] The main component of the partition assembly 5 is the partition plate.

[0269] The end face of the separator 5 is provided with an oil inlet channel 5103 and an oil outlet channel 5104 that are respectively adapted to the reverse oil inlet channel 2103 and the reverse oil outlet channel 2104 on the oil pump cover 21.

[0270] The end face of the separator 5 is provided with an oil inlet groove II5107 and an oil outlet groove II5108 that are respectively adapted to the reverse oil inlet groove I1107 (reverse oil inlet groove II2107) and the reverse oil outlet groove I1108 (reverse oil outlet groove II2108) on the oil pump body 11 (oil pump cover 21).

[0271] The end face of the partition component 5 is provided with control oil groove V5112 and control oil groove VI5113, which are respectively adapted to control oil grooves I1112 (control oil groove III2112) and II1113 (control oil groove IV2113) on the oil pump body 11 (oil pump cover 21).

[0272] The working principle of the oil pump when the oil pump device rotates in the forward and reverse directions.

[0273] See Figure 11 The pump unit operates in the forward rotation direction. When the pump unit finishes rotating in the reverse direction, the slide valve 43 moves to the right under the action of the spring 44 (spring returns to its original position), releasing the hydraulic oil stored in the valve chamber 1114 at the plug end. The hydraulic oil flows through the pressure relief oil passage D1 successively through the pump body control oil groove I1112, the partition plate control oil groove V5112, the pump cover control oil groove III2112, and the pump cover control oil passage I2114, finally being discharged through the pump cover reverse outlet oil passage 2104 to release the pressure. When the slide valve 43 moves to the right end, it closes the reverse inlet oil groove I1107 and the reverse outlet oil groove I1108 when the pump body 11 rotates in the reverse direction (the oil passage layout during reverse rotation is on the pump cover 21). External power drives the drive shaft 33 to rotate, which in turn drives the inner rotor 32 and outer rotor 31 to pump oil. Hydraulic oil in the forward-rotating oil circuit enters through the inlet 1109 via oil circuit L1, flowing successively through the valve port 1111, the forward-rotating oil inlet groove 1105 of the pump body, the forward-rotating oil inlet passage 1103, the forward-rotating oil outlet passage 1104, the forward-rotating oil outlet groove 1106 of the pump body, and the valve port 1111, finally flowing out through the outlet 1110. This process is mainly completed within the pump body assembly 1 and the spool valve assembly 4.

[0274] See Figure 11 , Figure 12The reverse rotation operation of the oil pump device is divided into two stages. The first stage is that the slide valve moves to the left, closing the forward rotation working oil circuit L1 in the oil pump body 11 and opening the reverse rotation working oil circuit L2. When the oil pump device starts to work in reverse rotation, the hydraulic oil (or gas - when there is no liquid) stored in the spring end valve chamber 1115 is sucked out by the oil pump device. The hydraulic oil flows through the pressure relief oil circuit D2 and successively through the oil pump body control oil tank II1113, the partition control oil tank VI5113, the oil pump cover control oil tank IV2113, the control oil passage II2115, and the reverse inlet oil passage 2103 to discharge pressure relief. At the same time, the pressurization oil circuit C enters the oil pump cover reverse outlet oil passage 2104, the control oil passage I2114, the control oil tank III2112 through the inner and outer rotor pumps, enters the partition control oil tank V5112, enters the oil pump body control oil tank I1112, and finally enters the screw end valve chamber 1114. At this time, a pressure difference is formed between the spring end valve chamber 1115 and the screw end valve chamber 1114. When the pressure formed by the pressure difference is greater than the elastic force of the spring 44, the slide valve 43 moves to the left, the forward rotation oil circuit L1 of the oil pump body 11 is closed, and the reverse rotation oil circuit L2 is opened. The second stage is the reverse rotation pumping stage. The hydraulic oil in the reverse rotation oil circuit L2 flows through the oil pump body inlet 1109, the oil pump body valve hole 1111, the oil pump body reverse inlet groove I1107, the partition plate inlet groove II5107, the oil pump cover reverse inlet groove II2107, the oil pump cover reverse inlet passage 2103, the oil pump cover reverse outlet passage 2104, the oil pump cover reverse outlet groove II2108, the partition plate outlet groove II5108, the oil pump body reverse outlet groove I1108, the oil pump body valve hole 1111, and finally flows out from the outlet 1110, providing the pressure and flow required for the working condition. This process is mainly completed within the oil pump cover assembly 2 and the slide valve assembly 4.

Claims

1. An oil pumping device, characterized in that, include: Oil pump body assembly (1), oil pump cover assembly (2), valve assembly (4) and partition assembly (5); The oil pump body assembly (1) includes an oil pump body (11) and an oil pump body bushing (12). The oil pump body (11) is a combination of a cylinder and a rectangular block. The top of the cylinder of the oil pump body (11) is provided with a rotor cavity (1101). The rotor cavity (1101) is provided with a drive shaft bushing hole I (1102), a forward rotation oil inlet passage (1103), and a forward rotation oil outlet passage (1104). The drive shaft bushing hole I (1102) is located at the center of the rotor cavity (1101). The forward rotation oil inlet passage (1103) and the forward rotation oil outlet passage (1104) surround the two sides of the rotor cavity (1101) and are connected. The rectangular block of the oil pump body (11) has a valve hole (1111) on one side facing inward. The top of the valve hole (1111) has, from the valve port inward, a control oil groove I (1112), a reverse oil inlet groove I (1107), an inlet groove I (1116), a forward oil inlet groove (1105), a reverse oil outlet groove I (1108), an outlet groove I (1117), a forward oil outlet groove (1106), and a control oil groove II (1113). The forward oil inlet groove (1105) and the forward oil inlet passage (1103) are connected, and the forward oil outlet groove (1106) and the forward oil outlet passage (1104) are connected. The valve hole (1111) The front end is provided with an oil inlet (1109) and an oil outlet (1110). The oil inlet (1109) is connected to the oil inlet groove I (1116), and the oil outlet (1110) is connected to the oil outlet groove I (1117). The valve hole (1111) is provided with a screw end valve chamber (1114) on the side close to the valve port and a spring end valve chamber (1115) on the side away from the valve port. The control oil groove I (1112) is connected to the screw end valve chamber (1114), and the control oil groove II (1113) is connected to the spring end valve chamber (1115). The oil pump body bushing (12) is an annular bushing and is placed in the drive shaft bushing hole I (1102). The oil pump cover assembly (2) includes an oil pump cover (21) and an oil pump cover bushing (22). The end face of the oil pump cover (21) is provided with a drive shaft bushing hole II (2102) corresponding to the drive shaft bushing hole I (1102), a reverse oil outlet passage (2104) corresponding to the forward rotation oil inlet passage (1103), a reverse oil inlet passage (2103) corresponding to the forward rotation oil outlet passage (1104), a reverse oil inlet groove II (2107) corresponding to the reverse oil inlet groove I (1107), a reverse oil outlet groove II (2108) corresponding to the reverse oil outlet groove I (1108), a control oil groove III (2112) corresponding to the control oil groove I (1112), and a control oil groove III (2112) corresponding to the control oil groove I (1112). II (1113) corresponds to control oil tank IV (2113), reverse oil inlet channel (2103) is connected to reverse oil outlet channel (2104), reverse oil inlet channel (2103) is connected to reverse oil inlet channel II (2107), reverse oil outlet channel (2104) is connected to reverse oil outlet channel II (2108), control oil tank III (2112) is connected to reverse oil outlet channel (2104) through control oil channel I (2114), control oil tank IV (2113) is connected to reverse oil inlet channel (2103) through control oil channel II (2115), oil pump cover bushing (22) is an annular bushing, placed in drive shaft bushing hole II (2102); The valve assembly (4) includes a screw plug (41), a slide valve (43), and a spring (44). The screw plug (41) is located on one side of the valve assembly (4), and the spring (44) is provided on the other side of the valve assembly (4). One side of the slide valve (43) is connected to the spring (44). The partition component (5) is a partition plate. The end face of the partition component (5) is provided with a drive shaft shaft hole II (5102) corresponding to the drive shaft bushing hole I (1102), an oil outlet channel (5104) corresponding to the forward rotation oil inlet channel (1103), an oil inlet channel (5103) corresponding to the forward rotation oil outlet channel (1104), an oil inlet channel II (5107) corresponding to the reverse rotation oil inlet channel I (1107), an oil outlet channel II (5108) corresponding to the reverse rotation oil outlet channel I (1108), a control oil channel V (5112) corresponding to the control oil channel I (1112), and a control oil channel VI (5113) corresponding to the control oil channel II (1113). The spring (44) is placed in the spring end valve cavity (1115), the slide valve (43) is placed in the valve hole (1111), the valve hole (1111) is blocked and the slide valve (43) is limited by the screw plug (41), the oil pump cover (21) is placed on the end face of the separator assembly (5), the separator assembly (5) is placed on the top of the oil pump body (11), the oil pump cover (21), the separator assembly (5) and the oil pump body (11) are fixedly connected to form a sealed structure including an oil inlet (1109) and an oil outlet (1110); The forward-rotating oil inlet channel (1103), oil outlet channel (5104), and reverse-rotating oil outlet channel (2104) are connected. The forward-rotating oil outlet channel (1104), oil inlet channel (5103), and reverse-rotating oil inlet channel (2103) are connected. The reverse-rotating oil inlet groove I (1107), oil inlet groove II (5107), and reverse-rotating oil inlet groove II (2107) are connected. The reverse-rotating oil outlet groove I (1108), oil outlet groove II (5108), and reverse-rotating oil outlet groove II (2108) are connected. The control oil groove I (1112), control oil groove V (5112), and control oil groove III (2112) are connected. The control oil groove II (1113), control oil groove VI (5113), and control oil groove IV (2113) are connected.

2. The oil pumping device according to claim 1, characterized in that, The device also includes a rotor assembly (3); The rotor assembly (3) includes an outer rotor (31), an inner rotor (32), a drive shaft (33), and a needle roller (34). The outer side of the outer rotor (31) is a cylindrical structure, and its inner side meshes with the outer side of the inner rotor (32). The inner side of the inner rotor (32) is provided with a drive shaft hole I (321), and the middle part of the drive shaft (33) is connected in the drive shaft hole I (321) of the inner rotor (32). The inner rotor (32) is placed inside the outer rotor (31), and the outer rotor (31) is placed inside the rotor cavity (1101) of the oil pump body (11). The drive shaft (33) is inserted into the oil pump cover bushing (22), drive shaft hole II (5102), drive shaft hole I (321), and oil pump body bushing (12) in sequence. The needle roller (34) is located in the drive shaft hole I (321) of the inner rotor (32) and is used to fix the drive shaft (33).

3. The oil pumping device according to claim 2, characterized in that, The rotor assembly (3) also includes a retaining ring (35); The retaining ring (35) is located between the drive shaft (33) and the drive shaft hole II (5102) of the partition assembly (5).

4. The oil pumping device according to claim 1, characterized in that, The valve assembly (4) also includes an O-ring (42); The O-ring (42) is fitted into the annular groove of the screw plug (41).

5. An oil pumping device according to any one of claims 1 to 4, characterized in that, The working modes of the oil pump device include forward rotation mode and reverse rotation mode.

6. The oil pumping device according to claim 5, characterized in that, The working principle of the positive rotation mode is as follows: When the pumping device starts to work in the forward rotation, the slide valve (43) moves towards the screw end valve chamber (1114) under the action of the spring (44). At this time, the hydraulic oil stored in the screw end valve chamber (1114) flows out from the control oil tank I (1112). The hydraulic oil flows out and passes through the control oil tank V (5112), control oil tank III (2112), and control oil passage I (2114) in sequence before entering the reverse oil passage (2104). When the slide valve (43) moves to the deepest part of the valve chamber (1114) at the end of the screw plug, the slide valve (43) closes the reverse rotation oil circuit. The external power drives the drive shaft (33) to rotate. The drive shaft (33) drives the inner rotor (32) and the outer rotor (31) to pump oil. The hydraulic oil that enters the pumping device from the oil inlet (1109) passes through the oil inlet groove I (1116), the forward rotation oil inlet groove (1105), the forward rotation oil inlet passage (1103), the forward rotation oil outlet passage (1104), and the forward rotation oil outlet groove (1106) in sequence, and then flows out of the oil outlet (1110) from the oil outlet groove I (1117).

7. The oil pumping device according to claim 5, characterized in that, The working principle of the reverse rotation mode is as follows: When the pumping device starts to work by rotating in reverse, the hydraulic oil or gas stored in the spring end valve chamber (1115) flows out from the control oil tank II (1113). The hydraulic oil or gas flows out sequentially through the control oil tank VI (5113), the control oil tank IV (2113), and the control oil passage II (2115) before entering the reverse inlet passage (2103). Then, the pumping device is pumped by the inner rotor (32) and the outer rotor (31) sequentially through the reverse outlet passage (2104), the control oil passage I (2114), the control oil tank III (2112), the control oil tank V (5112), and the control oil tank I (1112) before entering the screw end valve chamber (1114). When the pressure difference between the plug end valve chamber (1114) and the spring end valve chamber (1115) is greater than the elastic force of the spring (44), the slide valve (43) moves towards the spring end valve chamber (1115). When the slide valve (43) moves to the deepest part of the spring end valve chamber (1115), the slide valve (43) closes the forward rotation oil circuit. The hydraulic oil entering the pumping device from the oil inlet (1109) passes through the oil inlet groove I (1116) and the reverse oil inlet groove in sequence. After passing through oil inlet I (1107), oil inlet II (5107), and reverse oil inlet II (2107), the oil enters the reverse oil inlet channel (2103). Then, the oil is pumped by the inner rotor (32) and the outer rotor (31) and passes through the reverse oil outlet channel (2104), reverse oil outlet II (2108), oil outlet II (5108), and reverse oil outlet I (1108) in sequence, and then flows out of the oil outlet (1110) from the oil outlet I (1117).

8. The oil pumping device according to claim 1, characterized in that, The top surface of the oil pump body (11) is provided with a plurality of pin holes I (1118) and a plurality of screw holes I (1119), and the pin holes I (1118) and screw holes I (1119) penetrate the upper and lower surfaces. The end face of the oil pump cover (21) is provided with pin hole II (2118) corresponding to pin hole I (1118) and screw hole II (2119) corresponding to screw hole I (1119). The end face of the separator component (5) is provided with a pin hole III (5118) corresponding to pin hole I (1118) and a screw hole III (5119) corresponding to screw hole I (1119). The oil pump cover (21), the partition assembly (5), and the oil pump body (11) are fixedly connected by positioning pins (6) and screws (7) to form a sealed structure including an oil inlet (1109) and an oil outlet (1110).

9. The oil pumping device according to claim 1, characterized in that, The intervals between the forward-rotating oil inlet trough (1105), oil inlet trough I (1116), and reverse-rotating oil inlet trough I (1107) are the same; The intervals between the forward-rotating oil outlet trough (1106), the oil outlet trough I (1117), and the reverse-rotating oil outlet trough I (1108) are the same; The intervals between the forward-rotating oil inlet trough (1105), oil inlet trough I (1116), and reverse-rotating oil inlet trough I (1107) are the same as the intervals between the forward-rotating oil outlet trough (1106), oil outlet trough I (1117), and reverse-rotating oil outlet trough I (1108); The slide valve (43) is an equally spaced slide valve; The interval of the slide valve (43) is equal to the distance from the side of the oil inlet I (1116) near the reverse oil inlet I (1107) to the side of the forward oil inlet I (1105) away from the oil inlet I (1116).

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