Double-rotor oil pump device

Abstract

A double-rotor oil pump device comprises an oil pump body, an oil pump cover, a low-pressure inner rotor, a low-pressure outer rotor, a high-pressure inner rotor assembly, a high-pressure outer rotor, a plurality of positioning pins and a plurality of bolts. Two oil pump devices are integrated, a cooling lubricating pump and a clutch control pump are arranged, and the lubricating function and the pressure adjusting function of the oil pump are achieved at the same time. The structure is compact, matching and manufacturing of parts are reduced, and the manufacturing cost of products is reduced. The high-pressure driving shaft is in clearance fit with the center hole of the oil pump body and the oil pump cover for positioning rotation, and the risk of eccentric wear under high pressure is reduced. The V-shaped unloading groove is designed at the large end of the oil outlet groove of the oil pump body and the oil pump cover, so that the oil trapping phenomenon is effectively optimized and the pressure pulsation and noise are reduced under the high-flow and high-pressure working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to a dual-rotor oil pump device. Background Art

[0002] In an automatic transmission, the oil pump is the power source for the entire hydraulic system. The main oil pump plays a crucial role in the system, primarily providing lubrication and supplying oil to the friction pairs in each gear. During this operation, the pump operates at a high flow rate. It also primarily shifts gears and supplies oil to the pressure regulating device, requiring high operating pressure.

[0003] The multifunctional nature of the main oil pump results in a complex structure and high manufacturing costs. High flow and high pressure operating conditions result in poor NVH performance. Furthermore, the rotor in the high-pressure chamber is at risk of uneven wear. These issues urgently need to be addressed. Utility Model Content

[0004] The utility model aims to provide a dual-rotor oil pump device, comprising: an oil pump body, an oil pump cover, a low-pressure inner rotor, a low-pressure outer rotor, a high-pressure inner rotor assembly, a high-pressure outer rotor, a plurality of locating pins, and a plurality of bolts.

[0005] The oil pump body is provided with a lubrication pump rotor cavity, a clutch control pump rotor cavity, and a lubrication pump oil outlet.

[0006] An oil inlet groove I, an oil outlet groove I, and a drive shaft hole I are provided in the lubrication pump rotor cavity.

[0007] The drive shaft hole I is located in the center of the lubrication pump rotor cavity, and the oil inlet groove I and the oil outlet groove I surround both sides of the lubrication pump rotor cavity.

[0008] An oil inlet groove II, an oil outlet groove II, and a drive shaft hole II are provided in the clutch control pump rotor cavity.

[0009] The drive shaft hole II is located at the center of the clutch control pump rotor cavity, and the oil inlet groove II and the oil outlet groove II surround the clutch control pump rotor cavity on both sides.

[0010] The oil outlet of the lubrication pump is located on a side of the lubrication pump rotor cavity away from the clutch control pump rotor cavity.

[0011] The oil pump body is also provided with a plurality of pin holes I and a plurality of screw holes I.

[0012] The oil pump cover is provided with a drive shaft hole III corresponding to the drive shaft hole I of the oil pump body.

[0013] An oil inlet groove III corresponding to the oil inlet groove I of the oil pump body is provided around the drive shaft hole III.

[0014] An oil outlet groove III corresponding to the oil outlet groove I of the oil pump body is provided around the driving shaft hole III.

[0015] The oil outlet groove III is connected to the oil outlet of the lubrication pump of the oil pump body.

[0016] The oil pump cover is provided with a drive shaft hole IV corresponding to the drive shaft hole II of the oil pump body.

[0017] An oil inlet groove IV corresponding to the oil inlet groove II of the oil pump body is provided around the drive shaft hole IV.

[0018] An oil outlet groove IV corresponding to the oil outlet groove II of the oil pump body is provided around the driving shaft hole IV.

[0019] An oil inlet is provided between the oil inlet groove III and the oil inlet groove IV, and the oil inlet, the oil inlet groove III and the oil inlet groove IV are communicated with each other.

[0020] The oil pump cover is provided with a clutch control pump oil outlet on a side of the drive shaft hole IV away from the drive shaft hole III.

[0021] The clutch control pump oil outlet is connected to the oil outlet tank IV.

[0022] The oil pump cover is provided with a plurality of pin holes II corresponding to the pin holes I of the oil pump body.

[0023] The oil pump cover is provided with a plurality of screw holes II corresponding to the screw holes I of the oil pump body.

[0024] A driving spline I is provided on the outer side of the low-pressure inner rotor, and the middle part cooperates with the drive motor shaft.

[0025] The low-pressure outer rotor is a cylindrical structure, and the inner side cooperates with the driving spline I of the low-pressure inner rotor.

[0026] The low-pressure outer rotor is placed in the lubrication pump rotor cavity of the oil pump body, and the low-pressure inner rotor is placed in the low-pressure outer rotor.

[0027] The portion of the low-pressure inner rotor driving spline I protruding from the low-pressure outer rotor cooperates with the drive shaft hole I of the oil pump body.

[0028] The high-pressure inner rotor assembly includes a high-pressure drive shaft and a high-pressure inner rotor.

[0029] The high-pressure inner rotor is provided with a driving spline II on the outer side and cooperates with the high-pressure driving shaft in the middle.

[0030] The high-pressure outer rotor is a cylindrical structure, and the inner side cooperates with the driving spline II of the high-pressure inner rotor.

[0031] The high-pressure outer rotor is placed in the clutch control pump rotor cavity of the oil pump body, and the high-pressure inner rotor is placed in the high-pressure outer rotor.

[0032] The high-pressure drive shaft is inserted into the high-pressure inner rotor, and both ends of the high-pressure drive shaft are respectively matched with the drive shaft hole II of the oil pump body and the drive shaft hole IV of the oil pump cover.

[0033] The oil pump body and the oil pump cover are positioned and connected using positioning pins, and are fixed using bolts.

[0034] Furthermore, a V-shaped unloading groove I is provided at one end of the oil outlet groove I.

[0035] A unloading groove III corresponding to the unloading groove I is provided on one side of the oil outlet groove III.

[0036] Furthermore, a V-shaped unloading groove II is provided at one end of the oil outlet groove II.

[0037] The oil outlet groove IV is provided with an unloading groove IV corresponding to the unloading groove II.

[0038] Furthermore, a lubrication groove communicating with each other is opened between the oil outlet groove I and the drive shaft hole I.

[0039] Furthermore, the positioning pin is interference fit with the oil pump body.

[0040] Furthermore, the positioning pin is loosely fitted with the oil pump cover.

[0041] Furthermore, the portion of the low-pressure inner rotor driving spline I protruding from the low-pressure outer rotor is clearance-fitted with the drive shaft hole I of the oil pump body.

[0042] Furthermore, the high-pressure drive shaft and the high-pressure inner rotor are interference fit.

[0043] Furthermore, the high-pressure drive shaft is clearance-matched with the drive shaft hole II of the oil pump body.

[0044] Furthermore, the high-pressure drive shaft is clearance-matched with the drive shaft hole IV of the oil pump cover.

[0045] The technical effect of the present invention is unquestionable, and the present invention has the following advantages:

[0046] 1) This utility model integrates two oil pump devices into one: a cooling and lubrication pump and a clutch control pump, simultaneously fulfilling the oil pump's lubrication and pressure regulation functions. Its compact structure reduces the number of components and manufacturing, lowering product production costs.

[0047] 2) The high-pressure drive shaft and the center hole of the oil pump cover of the oil pump body are matched with each other in a clearance to position and rotate, reducing the risk of eccentric wear under high pressure.

[0048] 3) The oil pump cover is designed with a V-shaped unloading groove at the large end of the oil outlet groove, which effectively optimizes the oil trapped phenomenon and reduces pressure pulsation and noise under high flow and high pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a top view of the oil pump device;

[0050] Figure 2 for Figure 1 AA section view;

[0051] Figure 3 This is a structural diagram of the high-pressure inner rotor assembly;

[0052] Figure 4 This is the disassembled structural diagram of the oil pump device;

[0053] Figure 5 This is the oil pump body structure diagram;

[0054] Figure 6 This is the oil pump cover structure diagram;

[0055] In the figure: oil pump body 1, oil pump cover 2, low-pressure inner rotor 3, low-pressure outer rotor 4, high-pressure inner rotor assembly 5, high-pressure outer rotor 6, locating pin 7, bolt 8, lubrication pump rotor cavity 101, oil inlet groove I102, oil outlet groove I103, unloading groove I104, lubrication groove 105, drive shaft hole I106, clutch control pump rotor cavity 107, oil inlet groove II108, oil outlet groove II109, unloading groove II110, drive shaft hole II111, lubrication pump oil outlet 112, oil inlet 201, oil inlet groove III202, oil outlet groove III203, unloading groove III204, oil inlet groove IV205, oil outlet groove IV206, unloading groove IV207, drive shaft hole IV208, clutch control pump oil outlet 209, high-pressure drive shaft 501, and high-pressure inner rotor 502. DETAILED DESCRIPTION

[0056] The present invention will be further described below with reference to the following embodiments. However, it should not be understood that the scope of the present invention is limited to the following embodiments. Without departing from the above technical concept of the present invention, various substitutions and modifications based on common technical knowledge and customary means in the field should be included in the scope of protection of the present invention.

[0057] Example 1:

[0058] See also Figures 1 to 6 A dual-rotor oil pump device includes: an oil pump body 1, an oil pump cover 2, a low-pressure inner rotor 3, a low-pressure outer rotor 4, a high-pressure inner rotor assembly 5, a high-pressure outer rotor 6, a plurality of positioning pins 7, and a plurality of bolts 8.

[0059] The oil pump body 1 is provided with a lubrication pump rotor cavity 101 , a clutch control pump rotor cavity 107 , and a lubrication pump oil outlet 112 .

[0060] The lubrication pump rotor cavity 101 is provided with an oil inlet groove 1102, an oil outlet groove 1103, and a drive shaft hole 1106.

[0061] The drive shaft hole 1106 is located at the center of the lubrication pump rotor cavity 101 , and the oil inlet groove 1102 and the oil outlet groove 1103 surround the lubrication pump rotor cavity 101 on both sides.

[0062] The clutch control pump rotor cavity 107 is provided with an oil inlet groove II108 , an oil outlet groove II109 , and a drive shaft hole II111 .

[0063] The drive shaft hole II111 is located at the center of the clutch control pump rotor cavity 107 , and the oil inlet groove II108 and the oil outlet groove II109 surround the clutch control pump rotor cavity 107 on both sides.

[0064] The lubrication pump oil outlet 112 is located on a side of the lubrication pump rotor cavity 101 away from the clutch control pump rotor cavity 107 .

[0065] The oil pump body 1 is also provided with a plurality of pin holes 1 and a plurality of screw holes 1.

[0066] The oil pump cover 2 is provided with a drive shaft hole III corresponding to the drive shaft hole I106 of the oil pump body 1 .

[0067] An oil inlet groove III202 corresponding to the oil inlet groove I102 of the oil pump body 1 is provided around the drive shaft hole III.

[0068] An oil outlet groove III203 corresponding to the oil outlet groove I103 of the oil pump body 1 is provided around the driving shaft hole III.

[0069] The oil outlet groove III203 is connected to the lubrication pump oil outlet 112 of the oil pump body 1.

[0070] The oil pump cover 2 is provided with a drive shaft hole IV208 corresponding to the drive shaft hole II111 of the oil pump body 1 .

[0071] An oil inlet groove IV205 corresponding to the oil inlet groove II108 of the oil pump body 1 is provided around the driving shaft hole IV208 .

[0072] An oil outlet groove IV206 corresponding to the oil outlet groove II109 of the oil pump body 1 is provided around the driving shaft hole IV208 .

[0073] An oil inlet 201 is provided between the oil inlet groove III202 and the oil inlet groove IV205, and the oil inlet 201, the oil inlet groove III202 and the oil inlet groove IV205 are connected.

[0074] The oil pump cover 2 is provided with a clutch control pump oil outlet 209 on a side of the drive shaft hole IV208 away from the drive shaft hole III.

[0075] The clutch control pump oil outlet 209 is connected to the oil outlet tank IV206.

[0076] The oil pump cover 2 is provided with a plurality of pin holes II corresponding to the pin holes I of the oil pump body 1 .

[0077] The oil pump cover 2 is provided with a plurality of screw holes II corresponding to the screw holes I of the oil pump body 1 .

[0078] The outer side of the low-pressure inner rotor 3 is provided with a driving spline I, and the middle part cooperates with the driving motor shaft.

[0079] The low-pressure outer rotor 4 is a cylindrical structure, and the inner side cooperates with the driving spline I of the low-pressure inner rotor 3.

[0080] The low-pressure outer rotor 4 is placed in the lubrication pump rotor cavity 101 of the oil pump body 1 , and the low-pressure inner rotor 3 is placed in the low-pressure outer rotor 4 .

[0081] The portion of the low-pressure inner rotor 3 driving spline I protruding from the low-pressure outer rotor 4 cooperates with the drive shaft hole I106 of the oil pump body 1.

[0082] The high-pressure inner rotor assembly 5 includes a high-pressure drive shaft 501 and a high-pressure inner rotor 502 .

[0083] The high-pressure inner rotor 502 is provided with a driving spline II on the outside and cooperates with the high-pressure driving shaft 501 in the middle.

[0084] The high-pressure outer rotor 6 is a cylindrical structure, and the inner side cooperates with the driving spline II of the high-pressure inner rotor 502.

[0085] The high-pressure outer rotor 6 is placed in the clutch control pump rotor cavity 107 of the oil pump body 1 , and the high-pressure inner rotor 502 is placed in the high-pressure outer rotor 6 .

[0086] The high-pressure drive shaft 501 is inserted into the high-pressure inner rotor 502 , and both ends of the high-pressure drive shaft 501 are respectively matched with the drive shaft hole II111 of the oil pump body 1 and the drive shaft hole IV208 of the oil pump cover 2 .

[0087] The oil pump body 1 and the oil pump cover 2 are positioned and connected by the positioning pins 7 , and are fixed by the bolts 8 .

[0088] Example 2:

[0089] A dual-rotor oil pump device, the main technical content of which is shown in Example 1. Furthermore, a V-shaped unloading groove I104 is provided at one end of the oil outlet groove I103.

[0090] A unloading groove III204 corresponding to the unloading groove I104 is provided on one side of the oil outlet groove III203.

[0091] Example 3:

[0092] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 2. Furthermore, a V-shaped unloading groove II110 is provided at one end of the oil outlet groove II109.

[0093] The oil outlet groove IV206 is provided with an unloading groove IV207 corresponding to the unloading groove II110.

[0094] Example 4:

[0095] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 3. Furthermore, a mutually communicating lubrication groove 105 is opened between the oil outlet groove 1103 and the drive shaft hole 1106.

[0096] Example 5:

[0097] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 4. Furthermore, the positioning pin 7 is interference fit with the oil pump body 1.

[0098] Example 6:

[0099] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 5, further, the positioning pin 7 is clearance-matched with the oil pump cover 2.

[0100] Example 7:

[0101] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 6. Furthermore, the part of the low-pressure inner rotor 3 driving spline I protruding from the low-pressure outer rotor 4 is clearance-matched with the drive shaft hole I106 of the oil pump body 1.

[0102] Example 8:

[0103] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 7, further, the high-pressure drive shaft 501 and the high-pressure inner rotor 502 are interference fit.

[0104] Example 9:

[0105] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 8. Furthermore, the high-pressure drive shaft 501 is clearance-fitted with the drive shaft hole II111 of the oil pump body 1.

[0106] Example 10:

[0107] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 1 to 9. Furthermore, the high-pressure drive shaft 501 is clearance-matched with the drive shaft hole IV208 of the oil pump cover 2.

[0108] Example 11:

[0109] See also Figures 1 to 6 A dual-rotor oil pump device includes: an oil pump body 1, an oil pump cover 2, a low-pressure inner rotor 3, a low-pressure outer rotor 4, a high-pressure inner rotor assembly 5, a high-pressure outer rotor 6, a plurality of positioning pins 7, and a plurality of bolts 8.

[0110] The oil pump body 1 is provided with a lubrication pump rotor cavity 101 , a clutch control pump rotor cavity 107 , and a lubrication pump oil outlet 112 .

[0111] The lubrication pump rotor cavity 101 is provided with an oil inlet groove 1102, an oil outlet groove 1103, and a drive shaft hole 1106.

[0112] The drive shaft hole 1106 is located at the center of the lubrication pump rotor cavity 101 , and the oil inlet groove 1102 and the oil outlet groove 1103 surround the lubrication pump rotor cavity 101 on both sides.

[0113] The clutch control pump rotor cavity 107 is provided with an oil inlet groove II108 , an oil outlet groove II109 , and a drive shaft hole II111 .

[0114] The drive shaft hole II111 is located at the center of the clutch control pump rotor cavity 107 , and the oil inlet groove II108 and the oil outlet groove II109 surround the clutch control pump rotor cavity 107 on both sides.

[0115] The lubrication pump oil outlet 112 is located on a side of the lubrication pump rotor cavity 101 away from the clutch control pump rotor cavity 107 .

[0116] The oil pump body 1 is also provided with a plurality of pin holes 1 and a plurality of screw holes 1.

[0117] The oil pump cover 2 is provided with a drive shaft hole III corresponding to the drive shaft hole I106 of the oil pump body 1 .

[0118] An oil inlet groove III202 corresponding to the oil inlet groove I102 of the oil pump body 1 is provided around the drive shaft hole III.

[0119] An oil outlet groove III203 corresponding to the oil outlet groove I103 of the oil pump body 1 is provided around the driving shaft hole III.

[0120] The oil outlet groove III203 is connected to the lubrication pump oil outlet 112 of the oil pump body 1.

[0121] The oil pump cover 2 is provided with a drive shaft hole IV208 corresponding to the drive shaft hole II111 of the oil pump body 1 .

[0122] An oil inlet groove IV205 corresponding to the oil inlet groove II108 of the oil pump body 1 is provided around the driving shaft hole IV208 .

[0123] An oil outlet groove IV206 corresponding to the oil outlet groove II109 of the oil pump body 1 is provided around the driving shaft hole IV208 .

[0124] An oil inlet 201 is provided between the oil inlet groove III202 and the oil inlet groove IV205, and the oil inlet 201, the oil inlet groove III202 and the oil inlet groove IV205 are connected.

[0125] The oil pump cover 2 is provided with a clutch control pump oil outlet 209 on a side of the drive shaft hole IV208 away from the drive shaft hole III.

[0126] The clutch control pump oil outlet 209 is connected to the oil outlet tank IV206.

[0127] The oil pump cover 2 is provided with a plurality of pin holes II corresponding to the pin holes I of the oil pump body 1 .

[0128] The oil pump cover 2 is provided with a plurality of screw holes II corresponding to the screw holes I of the oil pump body 1 .

[0129] The outer side of the low-pressure inner rotor 3 is provided with a driving spline I, and the middle part cooperates with the driving motor shaft.

[0130] The low-pressure outer rotor 4 is a cylindrical structure, and the inner side cooperates with the driving spline I of the low-pressure inner rotor 3.

[0131] The low-pressure outer rotor 4 is placed in the lubrication pump rotor cavity 101 of the oil pump body 1 , and the low-pressure inner rotor 3 is placed in the low-pressure outer rotor 4 .

[0132] The portion of the low-pressure inner rotor 3 driving spline I protruding from the low-pressure outer rotor 4 cooperates with the drive shaft hole I106 of the oil pump body 1.

[0133] The high-pressure inner rotor assembly 5 includes a high-pressure drive shaft 501 and a high-pressure inner rotor 502 .

[0134] The high-pressure inner rotor 502 is provided with a driving spline II on the outside and cooperates with the high-pressure driving shaft 501 in the middle.

[0135] The high-pressure outer rotor 6 is a cylindrical structure, and the inner side cooperates with the driving spline II of the high-pressure inner rotor 502.

[0136] The high-pressure outer rotor 6 is placed in the clutch control pump rotor cavity 107 of the oil pump body 1 , and the high-pressure inner rotor 502 is placed in the high-pressure outer rotor 6 .

[0137] The high-pressure drive shaft 501 is inserted into the high-pressure inner rotor 502 , and both ends of the high-pressure drive shaft 501 are respectively matched with the drive shaft hole II111 of the oil pump body 1 and the drive shaft hole IV208 of the oil pump cover 2 .

[0138] The oil pump body 1 and the oil pump cover 2 are positioned and connected by the positioning pins 7 , and are fixed by the bolts 8 .

[0139] Example 12:

[0140] A dual-rotor oil pump device, the main technical content of which is shown in Example 11. Furthermore, a V-shaped unloading groove I104 is provided at one end of the oil outlet groove I103.

[0141] A unloading groove III204 corresponding to the unloading groove I104 is provided on one side of the oil outlet groove III203.

[0142] The addition of the unloading groove enables the maximum volume oil chamber to communicate with the oil outlet groove, effectively solving the oil trapping problem and reducing the oil pump noise.

[0143] Example 13:

[0144] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 12. Furthermore, a V-shaped unloading groove II110 is provided at one end of the oil outlet groove II109.

[0145] The oil outlet groove IV206 is provided with an unloading groove IV207 corresponding to the unloading groove II110.

[0146] The addition of the unloading groove enables the maximum volume oil chamber to communicate with the oil outlet groove, effectively solving the oil trapping problem and reducing the oil pump noise.

[0147] Example 14:

[0148] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 13. Furthermore, a mutually communicating lubrication groove 105 is opened between the oil outlet groove I103 and the drive shaft hole I106, so that the oil enters the drive shaft hole I through the lubrication groove, lubricating the low-pressure inner rotor when the lubrication pump is working.

[0149] Example 15:

[0150] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 14. Furthermore, the positioning pin 7 is interference fit with the oil pump body 1.

[0151] Example 16:

[0152] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 15, further, the positioning pin 7 is clearance-matched with the oil pump cover 2.

[0153] Example 17:

[0154] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 16. Furthermore, the part of the low-pressure inner rotor 3 driving spline I protruding from the low-pressure outer rotor 4 is clearance-matched with the drive shaft hole I106 of the oil pump body 1.

[0155] Example 18:

[0156] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 17, further, the high-pressure drive shaft 501 and the high-pressure inner rotor 502 are interference fit.

[0157] Example 19:

[0158] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 18. Furthermore, the high-pressure drive shaft 501 is clearance-fitted with the drive shaft hole II111 of the oil pump body 1.

[0159] Example 20:

[0160] A dual-rotor oil pump device, the main technical content of which is shown in any one of Examples 11 to 19. Furthermore, the high-pressure drive shaft 501 is clearance-matched with the drive shaft hole IV208 of the oil pump cover 2.

[0161] The high-pressure inner rotor is interference-fitted with the high-pressure drive shaft, and the high-pressure drive shaft is clearance-fitted with the drive shaft hole II and the drive shaft hole IV, so that it can be positioned and rotated, reducing the eccentric wear caused by high pressure. A drive spline is provided on the high-pressure drive shaft, and the drive motor shaft cooperates with the drive spline to drive the high-pressure inner rotor assembly to rotate.

[0162] Example 11:

[0163] See also Figures 1 to 6 , a dual-rotor oil pump device, the main technical contents include:

[0164] A dual-rotor oil pump device includes an oil pump body, an oil pump cover, a low-pressure inner rotor, a low-pressure outer rotor, a high-pressure inner rotor assembly, and a high-pressure outer rotor. The oil pump body includes a lubrication pump rotor cavity, a clutch control pump rotor cavity, and a lubrication pump oil outlet. The low-pressure outer rotor is positioned within the lubrication pump rotor cavity and rotates in conjunction with the low-pressure inner rotor. The high-pressure outer rotor is positioned within the clutch control pump rotor cavity and rotates in conjunction with the high-pressure inner rotor assembly. The oil pump body is provided with an oil pump cover that cooperates with the oil pump body and is provided with an oil inlet shared by the lubrication pump and clutch control pump.

[0165] Furthermore, the end surface of the oil pump body is machined with a lubrication pump rotor cavity and a clutch control pump rotor cavity. The bottom of the lubrication pump rotor cavity is provided with a drive shaft hole I, an oil inlet groove I, and an oil outlet groove I. The bottom of the clutch control pump rotor cavity is provided with a drive shaft hole II, an oil inlet groove II, and an oil outlet groove II.

[0166] Furthermore, a lubrication groove is formed between the drive shaft hole I and the oil outlet groove I, so that oil enters the drive shaft hole I through the lubrication groove to lubricate the low-pressure inner rotor during operation of the lubrication pump. The oil outlet groove I is provided with a V-shaped unloading groove I at its large end. The oil outlet groove II is provided with a V-shaped unloading groove II at its large end.

[0167] Furthermore, the end surface of the oil pump cover at the lubrication pump end is provided with an oil inlet groove III and an oil outlet groove III, and the end surface of the oil pump cover at the clutch control pump end is provided with an oil inlet groove IV, an oil outlet groove IV and a drive shaft hole IV corresponding to the drive shaft hole II. The oil inlet groove III and the oil inlet groove IV are in communication with the oil inlet, and the large end of the oil outlet groove III is provided with a V-shaped unloading groove III corresponding to the unloading groove I, and the large end of the oil outlet groove IV is provided with a V-shaped unloading groove IV corresponding to the unloading groove II. The addition of the unloading groove allows the maximum volume oil chamber to be connected to the oil outlet groove, effectively solving the oil trapped phenomenon and reducing the noise of the oil pump. The oil pump cover is provided with a clutch control pump oil outlet in communication with the oil outlet groove IV, and the oil outlet groove III is in communication with the oil outlet of the lubrication pump.

[0168] Furthermore, the oil pump cover is positioned and connected to the oil pump body via a positioning pin and fixed via a bolt. The positioning pin has an interference fit with the oil pump body and a clearance fit with the oil pump cover.

[0169] Furthermore, a drive spline is provided on the low-pressure inner rotor, and the drive motor shaft cooperates with the drive spline to drive the low-pressure inner rotor to rotate, and the protruding part of the spline is clearance-fitted with the drive shaft hole I.

[0170] Furthermore, the high-pressure inner rotor assembly includes a high-pressure inner rotor and a high-pressure drive shaft. The high-pressure inner rotor and the high-pressure drive shaft have an interference fit, and the high-pressure drive shaft has a clearance fit with the drive shaft hole II and the drive shaft hole IV, so that they can be positioned and rotated, reducing uneven wear caused by high pressure. The high-pressure drive shaft is provided with a drive spline, and the drive motor shaft cooperates with the drive spline to drive the high-pressure inner rotor assembly to rotate.

Claims

1. A twin-rotor oil pump device, characterized in that: include: An oil pump body (1), an oil pump cover (2), a low-pressure inner rotor (3), a low-pressure outer rotor (4), a high-pressure inner rotor assembly (5), a high-pressure outer rotor (6), a plurality of positioning pins (7), and a plurality of bolts (8); The oil pump body (1) is provided with a lubrication pump rotor cavity (101), a clutch control pump rotor cavity (107), and a lubrication pump oil outlet (112); The lubrication pump rotor cavity (101) is provided with an oil inlet groove I (102), an oil outlet groove I (103), and a drive shaft hole I (106); The drive shaft hole I (106) is located at the center of the lubrication pump rotor cavity (101), and the oil inlet groove I (102) and the oil outlet groove I (103) surround the lubrication pump rotor cavity (101) on both sides; The clutch control pump rotor cavity (107) is provided with an oil inlet groove II (108), an oil outlet groove II (109), and a drive shaft hole II (111); The drive shaft hole II (111) is located at the center of the clutch control pump rotor cavity (107), and the oil inlet groove II (108) and the oil outlet groove II (109) surround the clutch control pump rotor cavity (107) on both sides; The lubrication pump oil outlet (112) is located on a side of the lubrication pump rotor cavity (101) away from the clutch control pump rotor cavity (107); The oil pump body (1) is also provided with a plurality of pin holes I and a plurality of screw holes I; The oil pump cover (2) is provided with a drive shaft hole III corresponding to the drive shaft hole I (106) of the oil pump body (1); An oil inlet groove III (202) corresponding to the oil inlet groove I (102) of the oil pump body (1) is provided around the drive shaft hole III; An oil outlet groove III (203) corresponding to the oil outlet groove I (103) of the oil pump body (1) is provided around the driving shaft hole III; The oil outlet groove III (203) is connected to the lubrication pump oil outlet (112) of the oil pump body (1); The oil pump cover (2) is provided with a drive shaft hole IV (208) corresponding to the drive shaft hole II (111) of the oil pump body (1); An oil inlet groove IV (205) corresponding to the oil inlet groove II (108) of the oil pump body (1) is provided around the driving shaft hole IV (208); An oil outlet groove IV (206) corresponding to the oil outlet groove II (109) of the oil pump body (1) is provided around the driving shaft hole IV (208); An oil inlet (201) is provided between the oil inlet groove III (202) and the oil inlet groove IV (205), and the oil inlet (201), the oil inlet groove III (202), and the oil inlet groove IV (205) are in communication with each other; The oil pump cover (2) is provided with a clutch control pump oil outlet (209) on a side of the drive shaft hole IV (208) away from the drive shaft hole III; The clutch control pump oil outlet (209) is connected to the oil outlet tank IV (206); The oil pump cover (2) is provided with a plurality of pin holes II corresponding to the pin holes I of the oil pump body (1); The oil pump cover (2) is provided with a plurality of screw holes II corresponding to the screw holes I of the oil pump body (1); The low-pressure inner rotor (3) is provided with a driving spline I on the outside and is matched with the drive motor shaft in the middle; The low-pressure outer rotor (4) is a cylindrical structure, and the inner side thereof cooperates with the driving spline I of the low-pressure inner rotor (3); The low-pressure outer rotor (4) is placed in the lubrication pump rotor cavity (101) of the oil pump body (1), and the low-pressure inner rotor (3) is placed in the low-pressure outer rotor (4); The portion of the low-pressure inner rotor (3) driving spline I protruding from the low-pressure outer rotor (4) is engaged with the driving shaft hole I (106) of the oil pump body (1); The high-pressure inner rotor assembly (5) comprises a high-pressure drive shaft (501) and a high-pressure inner rotor (502); The high-pressure inner rotor (502) is provided with a driving spline II on the outside and is matched with the high-pressure driving shaft (501) in the middle; The high-pressure outer rotor (6) is a cylindrical structure, and the inner side thereof cooperates with the driving spline II of the high-pressure inner rotor (502); The high-pressure outer rotor (6) is placed in the clutch control pump rotor cavity (107) of the oil pump body (1), and the high-pressure inner rotor (502) is placed in the high-pressure outer rotor (6); The high-pressure drive shaft (501) is inserted into the high-pressure inner rotor (502), and both ends of the high-pressure drive shaft (501) are respectively matched with the drive shaft hole II (111) of the oil pump body (1) and the drive shaft hole IV (208) of the oil pump cover (2); The oil pump body (1) and the oil pump cover (2) are positioned and connected using a positioning pin (7), and the oil pump body (1) and the oil pump cover (2) are fixed using a bolt (8).

2. A twin-rotor oil pump device according to claim 1, characterized in that: One end of the oil outlet groove I (103) is provided with a V-shaped unloading groove I (104); A unloading groove III (204) corresponding to the unloading groove I (104) is provided on one side of the oil outlet groove III (203).

3. A twin-rotor oil pump device according to claim 1, characterized in that: One end of the oil outlet groove II (109) is provided with a V-shaped unloading groove II (110); The oil outlet groove IV (206) is provided with an unloading groove IV (207) corresponding to the unloading groove II (110).

4. A twin-rotor oil pump device according to claim 1, characterized in that: A lubrication groove (105) communicating with each other is provided between the oil outlet groove I (103) and the drive shaft hole I (106).

5. A twin-rotor oil pump device according to claim 1, characterized in that: The positioning pin (7) is interference-fitted with the oil pump body (1).

6. A twin-rotor oil pump device according to claim 1, characterized in that: The positioning pin (7) is clearance-matched with the oil pump cover (2).

7. The dual-rotor oil pump device according to claim 1, characterized in that: The portion of the low-pressure inner rotor (3) driving spline I protruding from the low-pressure outer rotor (4) is clearance-matched with the driving shaft hole I (106) of the oil pump body (1).

8. The dual-rotor oil pump device according to claim 1, characterized in that: The high-pressure drive shaft (501) and the high-pressure inner rotor (502) are interference-fitted.

9. The dual-rotor oil pump device according to claim 1, characterized in that: The high-pressure drive shaft (501) is clearance-matched with the drive shaft hole II (111) of the oil pump body (1).

10. The dual-rotor oil pump device according to claim 1, characterized in that: The high-pressure drive shaft (501) is clearance-matched with the drive shaft hole IV (208) of the oil pump cover (2).

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