Oil pumping device

Abstract

The invention discloses an oil pumping device which comprises an oil pump body assembly, an oil pump cover assembly, a rotor assembly and a partition assembly. According to the oil pumping device, the separation sleeve rotates to form the maximum containing cavities in the opposite directions, so that forward rotation and reverse rotation of the oil pumping device are achieved. Compared with a traditional oil pumping device, by controlling different positions of the separation sleeve, needed flow and pressure can be provided for a hydraulic system during forward rotation and reverse rotation, forward rotation and reverse rotation of the oil pumping device can be achieved without other auxiliary mechanisms, and the effect cannot be achieved in the traditional oil pumping device. The device is compact in structure and small in occupied space, is directly driven by a motor or a differential gear, and has a prospective technical effect of realizing light weight and intellectualization of an automobile.

Description

Technical Field

[0001] The invention relates to the technical field of automobile hydraulic systems, in particular to an oil pumping device. Background Art

[0002] Traditional automobile hydraulic systems are powered by gear pumps or cycloid pumps, and the engine drives the hydraulic pump through a speed change mechanism to obtain the required flow and pressure. This traditional oil pumping device can only work in forward rotation but not in reverse rotation.

[0003] With the development of new energy vehicle technology, especially the mature application of electric vehicle technology and hybrid electric vehicle technology, the hydraulic pump in its hydraulic system will be directly driven by a power motor or driven by the differential gear in the hybrid vehicle transmission system. When the vehicle moves forward, the motor or differential gear rotates forward; when the vehicle reverses or moves backward, the motor or differential gear rotates reversely. Therefore, the oil pump device driven by the motor or differential gear must meet both forward and reverse rotation. The traditional oil pump device cannot meet the above technical requirements and cannot be used in the hydraulic system directly driven by the power motor. Summary of the invention

[0004] The object of the present invention is to provide an oil pumping device, comprising an oil pump body assembly, an oil pump cover assembly, a rotor assembly and a partition assembly.

[0005] The oil pump body assembly provides a working chamber for the oil pumping device and provides an oil passage when the rotor assembly rotates in the forward and reverse directions.

[0006] The oil pump cover assembly is assembled and fixed with the oil pump body assembly to form a closed working chamber.

[0007] The oil pump cover assembly provides support for the drive shaft in the rotor assembly and limits the forward and reverse rotations of the partition assembly.

[0008] The rotor assembly includes an outer rotor, an inner rotor and a drive shaft.

[0009] The outer rotor is located in the rotor cavity of the separation assembly. The inner rotor and the outer rotor are meshed with each other.

[0010] The middle part of the driving shaft is connected to the inner rotor.

[0011] One end of the drive shaft is installed in the drive shaft hole II of the oil pump cover assembly, and the other end passes through the drive shaft hole I of the oil pump body assembly.

[0012] The partition plate assembly comprises a partition sleeve, a reverse rotation limit stop bar and a forward rotation limit stop bar.

[0013] When the rotor assembly rotates forward or reversely, the separation sleeve is used to realize the conversion of the maximum volume of the oil pumping device.

[0014] A rotor cavity for accommodating the inner rotor and the outer rotor is formed at one end of the separation sleeve.

[0015] The separation sleeve rotates within the range limited by the reverse rotation limit stop bar and the forward rotation limit stop bar.

[0016] Furthermore, when the oil pumping device changes from reverse rotation to forward rotation, the driving shaft drives the inner rotor to move, so that the inner rotor and the outer rotor perform forward meshing motion.

[0017] The outer rotor drives the separation sleeve to rotate in the forward direction under the force of friction. When the separation sleeve rotates to the maximum angle, the forward rotation limit bar limits the separation sleeve. The forward maximum volume cavity formed by the inner rotor and the outer rotor falls between the front oil passage of the oil inlet passage and the front oil passage of the oil outlet passage of the oil pump body assembly.

[0018] The outer rotor continues to rotate, and the hydraulic oil enters from the oil inlet hole of the oil pump body assembly according to the forward rotation oil circuit, enters the forward maximum volume chamber through the front oil channel of the oil inlet channel, and then discharges to the front oil channel of the oil outlet channel, and is discharged through the oil outlet hole of the oil pump body assembly to complete the forward rotation work.

[0019] Furthermore, when the oil pumping device changes from forward rotation to reverse rotation, the driving shaft drives the inner rotor to move, so that the inner rotor and the outer rotor perform reverse meshing movement.

[0020] The outer rotor drives the separation sleeve to rotate in the opposite direction under the force of friction. When the separation sleeve rotates to the maximum angle, the reverse rotation limit bar limits the separation sleeve. The reverse maximum volume cavity formed by the inner rotor and the outer rotor falls between the rear section of the oil channel of the oil inlet channel and the rear section of the oil channel of the oil outlet channel of the oil pump body assembly.

[0021] The outer rotor continues to rotate, and the hydraulic oil enters from the oil inlet hole according to the reverse rotation oil path, enters the reverse maximum volume chamber through the rear section of the oil inlet channel, and then is discharged to the rear section of the oil outlet channel and discharged through the oil outlet hole to complete the reverse rotation work.

[0022] Furthermore, the oil pump body assembly includes an oil pump body.

[0023] A cavity for accommodating the partition assembly is provided on the end surface of the oil pump body, and a drive shaft hole I is provided at the center of the cavity bottom.

[0024] The drive shaft hole I is connected to the oil seal hole.

[0025] The bottom of the cavity is provided with an oil inlet channel and an oil outlet channel surrounding the drive shaft hole I.

[0026] The front section oil passage and the rear section oil passage of the oil inlet passage are symmetrical relative to the horizontal central axis of the oil pump body.

[0027] The front section oil passage and the rear section oil passage of the oil outlet passage are symmetrical relative to the horizontal central axis of the oil pump body.

[0028] The oil inlet passage and the oil outlet passage are symmetrical relative to the vertical central axis of the oil pump body.

[0029] An oil inlet hole and an oil outlet hole are formed on the side end surface of the oil pump body. The oil inlet hole is connected to the oil inlet passage, and the oil outlet hole is connected to the oil outlet passage.

[0030] A sealing groove for assembling a sealing ring is provided on the assembly surface of the oil pump body.

[0031] Furthermore, a plurality of positioning pin holes and a plurality of threaded holes are formed on the assembly surface of the oil pump body.

[0032] These positioning pin holes and the plurality of threaded holes are used for assembling positioning pins and screws respectively, so as to accurately position and assemble and fix the oil pump cover of the pump cover assembly.

[0033] Furthermore, the oil pump cover assembly includes an oil pump cover.

[0034] A drive shaft hole II adapted to the drive shaft hole I of the oil pump body is provided on the end surface of the oil pump cover.

[0035] A stop pin hole is provided on the end surface of the oil pump cover for assembling a stop pin to limit the position of the partition assembly during forward and reverse rotation.

[0036] Furthermore, the assembly end surface of the oil pump cover is provided with a plurality of oil pump cover locating pin holes and a plurality of threaded through holes.

[0037] The oil pump cover locating pin holes and threaded through holes are used for assembling locating pins and screws respectively, so as to accurately locate and assemble and fix the oil pump body of the oil pump body assembly.

[0038] Furthermore, the eccentricity when the inner rotor meshes with the outer rotor is a.

[0039] The eccentricity between the inner diameter and the outer diameter of the separation sleeve is e, and e=a is satisfied.

[0040] Furthermore, the cross-sectional shape of the reverse rotation limit stop bar and the forward rotation limit stop bar is fan-shaped.

[0041] Furthermore, the maximum angle range limited by the reverse rotation limit stop bar and the forward rotation limit stop bar is 180°.

[0042] The technical effect of the present invention is undoubted, and the beneficial effects of the present invention are as follows:

[0043] 1) The forward and reverse rotation of the oil pump device is realized by rotating the separation sleeve to form the largest volume cavity in opposite directions (180°). The oil pump device can provide the required flow and pressure for the hydraulic system when working in forward and reverse rotation, and can realize the forward and reverse rotation of the oil pump device without other auxiliary mechanisms, which cannot be achieved in traditional oil pump devices.

[0044] 2) The oil pump device has a compact structure, occupies a small space, is directly driven by a motor, and has a forward-looking technical effect in achieving lightweight and intelligent automobiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 It is a schematic diagram of the assembly structure of the present invention;

[0047] Figure 3 It is a schematic diagram of the oil pump body structure;

[0048] Figure 4 It is a schematic diagram of the oil pump cover structure;

[0049] Figure 5 is a schematic diagram of the rotor assembly structure;

[0050] Figure 6 It is a schematic diagram of the separation sleeve structure;

[0051] Figure 7 This is the oil circuit diagram when the oil pump device rotates in the forward direction;

[0052] Figure 8 This is the oil circuit diagram when the oil pump device rotates in the reverse direction;

[0053] In the figure: oil pump body assembly 1, oil pump body 11, working chamber 1101, drive shaft shaft hole I1102, oil seal hole 1103, oil inlet passage 1104, oil outlet passage 1105, front section oil passage 1106 of oil inlet passage, rear section oil passage 1107 of oil inlet passage, horizontal center axis I1108, front section oil passage 1109 of oil outlet passage, rear section oil passage 1110 of oil outlet passage, vertical center axis II 1111, oil inlet port 1112, oil outlet port 1113, sealing ring groove 1114, positioning pin hole 11 15, threaded hole 1116, oil seal 12, sealing ring 13, locating pin 14; oil pump cover assembly 2, oil pump cover 21, drive shaft shaft hole II 2101, stop pin hole 2102, locating pin hole 2103, stop pin 22, screw 23; rotor assembly 3, inner rotor 31, outer rotor 32, drive shaft 33; separation assembly 4, separation sleeve 41, rotor cavity 4101, separation sleeve outer diameter 4102, limit stop bar 4103 during reverse rotation, limit stop bar 4104 during forward rotation. DETAILED DESCRIPTION

[0054] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0055] Embodiment 1:

[0056] See also Figure 1-Figure 8 , an oil pumping device, including an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3 and a partition assembly 4.

[0057] The oil pump body assembly 1 provides a working chamber 1101 for the oil pumping device and provides an oil passage when the rotor assembly 3 rotates in the forward and reverse directions.

[0058] The oil pump cover assembly 2 is assembled and fixed to the oil pump body assembly 1 to form a closed working chamber 1101 .

[0059] The oil pump cover assembly 2 provides support for the drive shaft 33 in the rotor assembly 3 and limits the forward and reverse rotations of the partition assembly 4 .

[0060] The rotor assembly 3 includes an outer rotor 32 , an inner rotor 31 and a drive shaft 33 .

[0061] The outer rotor 32 is located in the rotor cavity 4101 of the partition assembly 4. The inner rotor 31 and the outer rotor 32 are meshed with each other.

[0062] The middle portion of the drive shaft 33 is connected to the inner rotor 31 .

[0063] One end of the drive shaft 33 is installed in the drive shaft hole II2101 of the oil pump cover assembly 2, and the other end passes through the drive shaft hole I1102 of the oil pump body assembly 1.

[0064] The partition plate assembly 4 includes a partition sleeve 41 , a reverse rotation limit stop bar 4103 and a forward rotation limit stop bar 4104 .

[0065] When the rotor assembly 3 rotates forward or reversely, the separation sleeve 41 is used to achieve the conversion of the maximum volume of the oil pumping device.

[0066] A rotor cavity 4101 for accommodating the inner rotor 31 and the outer rotor 32 is formed at one end of the separation sleeve 41 .

[0067] The separation sleeve 41 rotates within the range limited by the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 .

[0068] When the oil pumping device changes from reverse rotation to forward rotation, the driving shaft 33 drives the inner rotor 31 to move, so that the inner rotor 31 and the outer rotor 32 perform forward meshing motion.

[0069] The outer rotor 32 drives the separation sleeve 41 to rotate in the forward direction under the action of friction force. When the separation sleeve 41 rotates to the maximum angle, the forward rotation limit stop bar 4104 limits the separation sleeve 41. The forward maximum volume cavity formed by the inner rotor 31 and the outer rotor 32 falls between the front oil passage 1106 of the oil inlet passage and the front oil passage 1109 of the oil outlet passage of the oil pump body assembly 1.

[0070] The outer rotor 32 continues to rotate, and the hydraulic oil enters from the oil inlet hole of the oil pump body assembly 1 according to the forward rotation oil circuit, enters the forward maximum volume chamber through the front oil passage 1106 of the oil inlet passage, and then is discharged to the front oil passage 1109 of the oil outlet passage, and is discharged through the oil outlet hole of the oil pump body assembly 1, completing the forward rotation work.

[0071] When the oil pumping device changes from forward rotation to reverse rotation, the driving shaft 33 drives the inner rotor 31 to move, so that the inner rotor 31 and the outer rotor 32 perform reverse meshing movement.

[0072] The outer rotor 32 drives the separation sleeve 41 to rotate in the opposite direction under the force of friction. When the separation sleeve 41 rotates to the maximum angle, the reverse rotation limit stop bar 4103 limits the separation sleeve 41. The reverse maximum volume cavity formed by the inner rotor 31 and the outer rotor 32 falls between the rear section oil passage 1107 of the oil inlet passage and the rear section oil passage 1110 of the oil outlet passage of the oil pump body assembly 1.

[0073] The outer rotor 32 continues to rotate, and the hydraulic oil enters from the oil inlet hole according to the reverse rotation oil path, enters the reverse maximum volume chamber through the rear section of the oil inlet channel 1104, and then discharges to the rear section of the oil outlet channel 1105, and is discharged through the oil outlet hole to complete the reverse rotation work.

[0074] The oil pump body assembly 1 includes an oil pump body 11 .

[0075] The end surface of the oil pump body 11 is provided with a cavity 1101 for accommodating the partition assembly 4. A drive shaft hole 1102 is provided at the center of the cavity bottom.

[0076] The drive shaft hole I1102 is connected to the oil seal hole 1103.

[0077] The bottom of the cavity 1101 is provided with an oil inlet passage 1104 and an oil outlet passage 1105 surrounding the drive shaft hole I1102.

[0078] The front section oil passage and the rear section oil passage of the oil inlet passage 1104 are symmetrical with respect to the horizontal central axis 1108 of the oil pump body 11 .

[0079] The front section oil passage and the rear section oil passage of the oil outlet passage 1105 are symmetrical with respect to the horizontal central axis 1108 of the oil pump body 11 .

[0080] The oil inlet passage 1104 and the oil outlet passage 1105 are symmetrical with respect to the vertical central axis 1111 of the oil pump body 11 .

[0081] An oil inlet hole and an oil outlet hole are formed on the side end surface of the oil pump body 11 . The oil inlet hole is connected to the oil inlet passage 1104 , and the oil outlet hole is connected to the oil outlet passage 1105 .

[0082] A sealing groove for assembling a sealing ring 13 is formed on the assembly surface of the oil pump body 11 .

[0083] The assembly surface of the oil pump body 11 is provided with a plurality of positioning pin holes 1115 and a plurality of threaded holes 1116 .

[0084] These positioning pin holes 1115 and the plurality of threaded holes 1116 are used to assemble the positioning pins 14 and the screws 23 , respectively, so as to accurately position and assemble and fix the oil pump cover 21 of the pump cover assembly 2 .

[0085] The oil pump cover assembly 2 includes an oil pump cover 21 .

[0086] A drive shaft hole II 2101 adapted to the drive shaft hole I 1102 of the oil pump body 11 is formed on the end surface of the oil pump cover 21 .

[0087] A stop pin hole 2102 is provided on the end surface of the oil pump cover 21 for assembling the stop pin 22 to limit the position of the partition assembly 4 during forward and reverse rotation.

[0088] The assembly end surface of the oil pump cover 21 is provided with a plurality of oil pump cover positioning pin holes 2103 and a plurality of threaded through holes.

[0089] The oil pump cover locating pin holes 2103 and threaded through holes are used for assembling the locating pins 14 and the screws 23 , respectively, so as to accurately locate and assemble and fix the oil pump body 11 of the oil pump body assembly 1 .

[0090] When the inner rotor 31 and the outer rotor 32 are meshed, the eccentricity is a.

[0091] The eccentricity between the inner diameter and the outer diameter 4102 of the separation sleeve 41 is e, and e=a is satisfied.

[0092] The cross-sectional shape of the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 is fan-shaped.

[0093] The maximum angle range limited by the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 is 180°.

[0094] Embodiment 2:

[0095] An oil pump device comprises an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3 and a partition assembly 4.

[0096] The oil pump body assembly 1 provides a working chamber 1101 for the oil pumping device and provides an oil passage when the rotor assembly 3 rotates in the forward and reverse directions.

[0097] The oil pump cover assembly 2 is assembled and fixed to the oil pump body assembly 1 to form a closed working chamber 1101 .

[0098] The oil pump cover assembly 2 provides support for the drive shaft 33 in the rotor assembly 3 and limits the forward and reverse rotations of the partition assembly 4 .

[0099] The rotor assembly 3 includes an outer rotor 32 , an inner rotor 31 and a drive shaft 33 .

[0100] The outer rotor 32 is located in the rotor cavity 4101 of the partition assembly 4. The inner rotor 31 and the outer rotor 32 are meshed with each other.

[0101] The middle portion of the drive shaft 33 is connected to the inner rotor 31 .

[0102] One end of the drive shaft 33 is installed in the drive shaft hole II2101 of the oil pump cover assembly 2, and the other end passes through the drive shaft hole I1102 of the oil pump body assembly 1.

[0103] The partition plate assembly 4 includes a partition sleeve 41 , a reverse rotation limit stop bar 4103 and a forward rotation limit stop bar 4104 .

[0104] When the rotor assembly 3 rotates forward or reversely, the separation sleeve 41 is used to achieve the conversion of the maximum volume of the oil pumping device.

[0105] A rotor cavity 4101 for accommodating the inner rotor 31 and the outer rotor 32 is formed at one end of the separation sleeve 41 .

[0106] The separation sleeve 41 rotates within the range limited by the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 .

[0107] Embodiment 3:

[0108] An oil pumping device, the technical content of which is the same as that of Example 2. Furthermore, when the oil pumping device changes from reverse rotation to forward rotation, the drive shaft 33 drives the inner rotor 31 to move, so that the inner rotor 31 and the outer rotor 32 perform forward meshing motion.

[0109] The outer rotor 32 drives the separation sleeve 41 to rotate in the forward direction under the action of friction force. When the separation sleeve 41 rotates to the maximum angle, the forward rotation limit stop bar 4104 limits the separation sleeve 41. The forward maximum volume cavity formed by the inner rotor 31 and the outer rotor 32 falls between the front oil passage 1106 of the oil inlet passage and the front oil passage 1109 of the oil outlet passage of the oil pump body assembly 1.

[0110] The outer rotor 32 continues to rotate, and the hydraulic oil enters from the oil inlet hole of the oil pump body assembly 1 according to the forward rotation oil circuit, enters the forward maximum volume chamber through the front oil passage 1106 of the oil inlet passage, and then is discharged to the front oil passage 1109 of the oil outlet passage, and is discharged through the oil outlet hole of the oil pump body assembly 1, completing the forward rotation work.

[0111] Embodiment 4:

[0112] An oil pumping device, the technical content of which is the same as any one of Examples 2-3. Further, when the oil pumping device changes from forward rotation to reverse rotation, the drive shaft 33 drives the inner rotor 31 to move, so that the inner rotor 31 and the outer rotor 32 perform reverse meshing motion.

[0113] The outer rotor 32 drives the separation sleeve 41 to rotate in the opposite direction under the force of friction. When the separation sleeve 41 rotates to the maximum angle, the reverse rotation limit stop bar 4103 limits the separation sleeve 41. The reverse maximum volume cavity formed by the inner rotor 31 and the outer rotor 32 falls between the rear section oil passage 1107 of the oil inlet passage and the rear section oil passage 1110 of the oil outlet passage of the oil pump body assembly 1.

[0114] The outer rotor 32 continues to rotate, and the hydraulic oil enters from the oil inlet hole according to the reverse rotation oil path, enters the reverse maximum volume chamber through the rear section of the oil inlet channel 1104, and then discharges to the rear section of the oil outlet channel 1105, and is discharged through the oil outlet hole to complete the reverse rotation work.

[0115] Embodiment 5:

[0116] An oil pumping device, the technical content of which is the same as any one of embodiments 2-4, further, the oil pump body assembly 1 includes an oil pump body 11.

[0117] The end surface of the oil pump body 11 is provided with a cavity 1101 for accommodating the partition assembly 4. A drive shaft hole 1102 is provided at the center of the cavity bottom.

[0118] The drive shaft hole I1102 is connected to the oil seal hole 1103.

[0119] The bottom of the cavity 1101 is provided with an oil inlet passage 1104 and an oil outlet passage 1105 surrounding the drive shaft hole I1102.

[0120] The front section oil passage and the rear section oil passage of the oil inlet passage 1104 are symmetrical with respect to the horizontal central axis 1108 of the oil pump body 11 .

[0121] The front section oil passage and the rear section oil passage of the oil outlet passage 1105 are symmetrical with respect to the horizontal central axis 1108 of the oil pump body 11 .

[0122] The oil inlet passage 1104 and the oil outlet passage 1105 are symmetrical with respect to the vertical central axis 1111 of the oil pump body 11 .

[0123] An oil inlet hole and an oil outlet hole are formed on the side end surface of the oil pump body 11 . The oil inlet hole is connected to the oil inlet passage 1104 , and the oil outlet hole is connected to the oil outlet passage 1105 .

[0124] A sealing groove for assembling a sealing ring 13 is formed on the assembly surface of the oil pump body 11 .

[0125] Embodiment 6:

[0126] An oil pumping device, the technical content of which is the same as any one of embodiments 2-5, further, a plurality of positioning pin holes 1115 and a plurality of threaded holes 1116 are opened on the assembly surface of the oil pump body 11.

[0127] These positioning pin holes 1115 and the plurality of threaded holes 1116 are used to assemble the positioning pins 14 and the screws 23 , respectively, so as to accurately position and assemble and fix the oil pump cover 21 of the pump cover assembly 2 .

[0128] Embodiment 7:

[0129] An oil pumping device, the technical content of which is the same as any one of Embodiments 2-6, and further, the oil pump cover assembly 2 includes an oil pump cover 21.

[0130] A drive shaft hole II 2101 adapted to the drive shaft hole I 1102 of the oil pump body 11 is formed on the end surface of the oil pump cover 21 .

[0131] A stop pin hole 2102 is provided on the end surface of the oil pump cover 21 for assembling the stop pin 22 to limit the position of the partition assembly 4 during forward and reverse rotation.

[0132] Embodiment 8:

[0133] An oil pumping device, the technical content of which is the same as any one of embodiments 2-7, further, the assembly end surface of the oil pump cover 21 is provided with a plurality of oil pump cover locating pin holes 2103 and a plurality of threaded through holes.

[0134] The oil pump cover locating pin holes 2103 and threaded through holes are used for assembling the locating pins 14 and the screws 23 , respectively, so as to accurately locate and assemble and fix the oil pump body 11 of the oil pump body assembly 1 .

[0135] Embodiment 9:

[0136] An oil pumping device, the technical content of which is the same as any one of embodiments 2-8, further, the eccentricity when the inner rotor 31 and the outer rotor 32 are engaged is a.

[0137] The eccentricity between the inner diameter and the outer diameter of the separation sleeve 41 is e, and e=a is satisfied.

[0138] Embodiment 10:

[0139] An oil pumping device, the technical content of which is the same as any one of embodiments 2-9, further, the cross-sectional shape of the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 is fan-shaped.

[0140] Embodiment 11:

[0141] An oil pumping device, the technical content of which is the same as any one of embodiments 2-10, further, the maximum angle range limited by the reverse rotation limit stop bar 4103 and the forward rotation limit stop bar 4104 is 180°.

[0142] Embodiment 12:

[0143] An oil pumping device, see Figure 1 , Figure 2 , including an oil pump body assembly 1, an oil pump cover assembly 2, a rotor assembly 3, and a partition assembly 4.

[0144] See also Figure 3 , Figure 7 , Figure 8 The main component of the oil pump body assembly 1 is the oil pump body 11, and its main function is to provide a working chamber 1101 for the oil pump device, as well as an oil passage during forward and reverse rotation.

[0145] A cavity 1101 for accommodating a separation sleeve is provided on the end surface of the oil pump body 11. A drive shaft hole 1102 is provided at the center of the cavity bottom of the cavity. One end of the drive shaft hole 1102 is connected to the cavity 1101, and the other end is connected to the oil seal hole 1103.

[0146] The bottom of the cavity 1101 is provided with an oil inlet passage 1104 and an oil outlet passage 1105 surrounding the drive shaft hole I1102.

[0147] The front section oil passage 1106 and the rear section oil passage 1107 of the oil inlet passage 1104 are symmetrical with respect to the horizontal central axis I1108. The front section oil passage 1109 and the rear section oil passage 1110 of the oil outlet passage 1105 are symmetrical with respect to the horizontal central axis I1108.

[0148] The oil inlet passage 1104 and the oil outlet passage 1105 are symmetrical with respect to the vertical central axis II 1111 .

[0149] The side surface of the oil pump body 11 is provided with an oil inlet hole 1112 and an oil outlet hole 1113. The oil inlet hole 1112 is connected to the oil inlet passage 1104, and the oil outlet hole 1113 is connected to the oil outlet passage 1105.

[0150] A sealing groove 1114 for assembling the sealing ring 13 is formed on the assembly surface of the oil pump body 11 .

[0151] The assembly surface of the oil pump body is provided with two positioning pin holes 1115 and three threaded holes 1116, which are used to assemble the positioning pins 14 and the screws 23 respectively, and can be accurately positioned and assembled and fixed with the oil pump cover, and sealed by the sealing ring 13.

[0152] The main component of the oil pump cover assembly 2 is the oil pump cover 21, whose main function is to form a closed working chamber 1101 with the oil pump body 11, provide support for the drive shaft 33, and limit the position of the separation sleeve 41 when it rotates forward and reverse.

[0153] The end surface of the oil pump cover 21 is provided with a drive shaft hole II 2101 adapted to the drive shaft hole I 1102 of the oil pump body 11. The end surface of the oil pump cover 21 is provided with a stop pin hole 2102 for assembling a stop pin 22 to limit the position of the separation sleeve 41 during forward and reverse rotation.

[0154] The assembly end surface of the oil pump cover 21 is provided with two positioning pin holes 2103 and three threaded through holes 2104, which are used for assembling the positioning pins 11 and the screws 23, respectively, and can be accurately positioned and assembled with the oil pump body 11.

[0155] The oil pump cover 21 is mounted on the oil pump body 11 .

[0156] The rotor assembly 3 includes an outer rotor 32 , an inner rotor 31 and a drive shaft 33 .

[0157] The outer rotor 32 is located in the rotor cavity of the separation sleeve 41. The inner rotor 31 is located in the outer rotor 32 and meshes with the outer rotor 32. When the inner rotor 31 meshes with the outer rotor 32, the eccentricity is a.

[0158] The middle part of the drive shaft 33 is connected to the inner rotor 31. One end of the drive shaft 33 is installed in the drive shaft hole I2101 of the oil pump cover 21, and the other end passes through the drive shaft hole II1102 of the oil pump body 11.

[0159] The main component of the partition plate assembly 4 is the partition sleeve 41, and its main function is to convert the maximum volume S during forward and reverse rotation operations to achieve forward and reverse rotation operations.

[0160] A rotor cavity 4101 for accommodating the inner rotor 31 and the outer rotor 32 is formed at one end of the separation sleeve 41 .

[0161] The eccentricity between the rotor cavity 4101 of the separation sleeve 41 and the outer diameter 4102 of the separation sleeve is e, and e=a is satisfied.

[0162] The other end of the separation sleeve 41 is provided with a limit stop bar 4103 for reverse rotation and a limit stop bar 4104 for forward rotation, and the two limit stop bars are distributed in a fan shape. The separation sleeve 41 rotates within the range of the two limit stop bars. The angle range limited by the two stop bars is 180°.

[0163] Working principle of oil pump when the oil pump device rotates forward and reverse

[0164] The oil pumping device works in forward rotation.

[0165] When the reverse rotation of the oil pumping device is finished and it turns to the forward rotation, the driving shaft 33 drives the inner rotor 31 and performs forward meshing motion with the outer rotor 32. The outer rotor 32 drives the separation sleeve 41 to rotate forward under the force of friction. When the separation sleeve 41 rotates 180° and stops, the maximum volume S1 formed by the inner and outer rotors falls between the front section oil passage 1106 of the oil inlet passage 1104 and the front section oil passage 1109 of the oil outlet passage 1105. The outer rotor 32 continues to rotate, and the hydraulic oil enters from the oil inlet hole 1112 according to the forward rotation oil path L1, enters the maximum volume S1 through the front section oil passage 1106 of the oil inlet passage 1104, and then discharges to the front section oil passage 1109 of the oil outlet passage 1105, and is discharged through the oil outlet hole 1113, completing the forward rotation.

[0166] The oil pumping device works in reverse rotation.

[0167] When the oil pumping device finishes the forward rotation and turns to reverse rotation, the driving shaft 33 drives the inner rotor 31 and engages with the outer rotor 32 in the reverse direction. Under the force of friction, the outer rotor 32 drives the separation sleeve 41 to rotate in the reverse direction. When the separation sleeve 41 rotates 180° and stops, the maximum volume S formed by the inner and outer rotors falls between the rear section oil passage 1107 of the oil inlet passage 1104 and the rear section oil passage 1110 of the oil outlet passage 1105. The maximum volume S2 formed at this time is exactly opposite to the direction of the maximum volume S1 during forward rotation. When the outer rotor 32 continues to rotate, the hydraulic oil enters from the oil inlet hole 1112 according to the reverse rotation oil path L2, enters the maximum volume S2 through the rear section oil passage 1107 of the oil inlet passage 1104, and then discharges to the rear section oil passage 1110 of the oil outlet passage 1105, and is discharged through the oil outlet hole 1113, completing the reverse rotation.

[0168] The oil pumping device disclosed in this embodiment can realize the forward and reverse rotation oil pumping operation of the oil pumping device without other auxiliary mechanisms; and the oil pumping device has a compact structure, occupies a small space, is directly driven by a motor or a differential gear, and has a forward-looking technical effect in realizing the lightweight and intelligentization of the automobile.

Claims

1. An oil pump device, characterized in that: It comprises an oil pump body assembly (1), an oil pump cover assembly (2), a rotor assembly (3) and the partition assembly (4). The oil pump body assembly (1) provides a working chamber (1101) for the oil pumping device and provides an oil passage when the rotor assembly (3) rotates in the forward and reverse directions. The oil pump cover assembly (2) is assembled and fixed to the oil pump body assembly (1), thereby forming a closed working chamber (1101); The oil pump cover assembly (2) provides support for the drive shaft (33) in the rotor assembly (3) and limits the forward and reverse rotation of the partition assembly (4); The rotor assembly (3) comprises an outer rotor (32), an inner rotor (31) and a drive shaft (33); The outer rotor (32) is located in the rotor cavity (4101) of the separation assembly (4); the inner rotor (31) and the outer rotor (32) are meshed with each other; The middle portion of the drive shaft (33) is connected to the inner rotor (31); One end of the drive shaft (33) is installed in the drive shaft hole II (2101) of the oil pump cover assembly (2), and the other end passes through the drive shaft hole I (1102) of the oil pump body assembly (1); The partition plate assembly (4) comprises a partition sleeve (41), a reverse rotation limit stop bar (4103) and a forward rotation limit stop bar (4104); When the rotor assembly (3) rotates in the forward and reverse directions, the separation sleeve (41) is used to achieve the conversion of the maximum volume of the oil pumping device; A rotor cavity (4101) for accommodating the inner rotor (31) and the outer rotor (32) is formed at one end of the separation sleeve (41); The separation sleeve (41) rotates within the range limited by the reverse rotation limit stop bar (4103) and the forward rotation limit stop bar (4104).

2. An oil pump device according to claim 1, characterized in that: When the oil pump device changes from reverse rotation to forward rotation, the drive shaft (33) drives the inner rotor (31) to move, so that the inner rotor (31) and the outer rotor (32) perform forward meshing movement; The outer rotor (32) drives the separation sleeve (41) to rotate in the forward direction under the action of friction force. When the separation sleeve (41) rotates to the maximum angle, the forward rotation limit stopper (4104) limits the separation sleeve (41), and the forward maximum volume cavity formed by the inner rotor (31) and the outer rotor (32) falls between the front section oil passage (1106) of the oil inlet passage and the front section oil passage (1109) of the oil outlet passage of the oil pump body assembly (1); The outer rotor (32) continues to rotate, and the hydraulic oil enters from the oil inlet hole of the oil pump body assembly (1) according to the forward rotation oil path, enters the forward maximum volume chamber through the front section oil passage (1106) of the oil inlet passage, and then flows to the front section oil passage (1109) of the oil outlet passage, and is discharged through the oil outlet hole of the oil pump body assembly (1), completing the forward rotation work.

3. An oil pump device according to claim 1, characterized in that: When the oil pump device changes from forward rotation to reverse rotation, the drive shaft (33) drives the inner rotor (31) to move, so that the inner rotor (31) and the outer rotor (32) perform reverse meshing movement; The outer rotor (32) drives the separation sleeve (41) to rotate in the opposite direction under the action of friction force. When the separation sleeve (41) rotates to the maximum angle, the reverse rotation limit stopper (4103) limits the separation sleeve (41), and the reverse maximum volume cavity formed by the inner rotor (31) and the outer rotor (32) falls between the rear section oil passage (1107) of the oil inlet passage and the rear section oil passage (1110) of the oil outlet passage of the oil pump body assembly (1). The outer rotor (32) continues to rotate, and the hydraulic oil enters from the oil inlet hole according to the reverse rotation oil path, enters the reverse maximum volume chamber through the rear section oil passage of the oil inlet passage (1104), and then flows to the rear section oil passage of the oil outlet passage (1105), and is discharged through the oil outlet hole, completing the reverse rotation work.

4. An oil pump device according to claim 1, characterized in that: The oil pump body assembly (1) comprises an oil pump body (11); A cavity (1101) for accommodating the partition assembly (4) is provided on the end surface of the oil pump body (11); a drive shaft hole I (1102) is provided at the center of the bottom of the cavity; The drive shaft hole I (1102) is connected to the oil seal hole (1103); The bottom of the cavity (1101) is provided with an oil inlet passage (1104) and an oil outlet passage (1105) surrounding the drive shaft hole I (1102); The front section oil passage and the rear section oil passage of the oil inlet passage (1104) are symmetrical relative to the horizontal central axis (1108) of the oil pump body (11); The front section oil passage and the rear section oil passage of the oil outlet passage (1105) are symmetrical relative to the horizontal central axis (1108) of the oil pump body (11); The oil inlet passage (1104) and the oil outlet passage (1105) are symmetrical relative to the vertical central axis (1111) of the oil pump body (11); An oil inlet hole and an oil outlet hole are formed on the side end surface of the oil pump body (11), the oil inlet hole is connected to the oil inlet passage (1104), and the oil outlet hole is connected to the oil outlet passage (1105); A sealing groove for assembling a sealing ring (13) is provided on the assembly surface of the oil pump body (11).

5. An oil pump device according to claim 1, characterized in that: The assembly surface of the oil pump body (11) is provided with a plurality of positioning pin holes (1115) and a plurality of threaded holes (1116); These positioning pin holes (1115) and the plurality of threaded holes (1116) are used to assemble the positioning pins (14) and the screws (23) respectively, so as to accurately position and assemble and fix the oil pump cover (21) of the pump cover assembly (2).

6. An oil pump device according to claim 1, characterized in that: The oil pump cover assembly (2) comprises an oil pump cover (21); The end surface of the oil pump cover (21) is provided with a drive shaft hole II (2101) adapted to the drive shaft hole I (1102) of the oil pump body (11); A stop pin hole (2102) is provided on the end surface of the oil pump cover (21) for assembling a stop pin (22) to limit the position of the partition assembly (4) during forward and reverse rotation.

7. An oil pump device according to claim 1, characterized in that: The assembly end surface of the oil pump cover (21) is provided with a plurality of oil pump cover positioning pin holes (2103) and a plurality of threaded through holes; The oil pump cover positioning pin holes (2103) and threaded through holes are used for assembling positioning pins (14) and screws (23) respectively, so as to accurately position and assemble and fix the oil pump body (11) of the oil pump body assembly (1).

8. An oil pump device according to claim 1, characterized in that: When the inner rotor (31) and the outer rotor (32) are meshed, the eccentricity is a; The eccentricity between the inner diameter of the separation sleeve (41) and the outer diameter of the separation sleeve (4102) is e, and e=a is satisfied.

9. An oil pump device according to claim 1, characterized in that: The cross-sectional shape of the reverse rotation limit stop bar (4103) and the forward rotation limit stop bar (4104) is fan-shaped.

10. An oil pump device according to claim 1, characterized in that: The maximum angle range limited by the reverse rotation limit stop bar (4103) and the forward rotation limit stop bar (4104) is 180°.

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