CN210799344U - Automatic transmission oil pump - Google Patents

Automatic transmission oil pump Download PDF

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Publication number
CN210799344U
CN210799344U CN201921432825.5U CN201921432825U CN210799344U CN 210799344 U CN210799344 U CN 210799344U CN 201921432825 U CN201921432825 U CN 201921432825U CN 210799344 U CN210799344 U CN 210799344U
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China
Prior art keywords
oil
oil pump
gear
cavity
groove
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CN201921432825.5U
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Chinese (zh)
Inventor
吴松
陶丽
李家驹
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Chongqing Hongyu Precision Industrial Co ltd
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Chongqing Hongyu Precision Industrial Co ltd
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Abstract

The utility model provides an automatic transmission oil pump. The oil pump comprises a reaction support assembly, an oil pump shell assembly, a driving gear, a driven gear, a bolt, a needle bearing, an oil seal, a positioning pin and an oil pump shell bushing. The driving gear comprises two key teeth and is directly connected with the hydraulic torque converter. The torque converter drives the gear to rotate. The reaction support assembly and the oil pump shell assembly are designed to correspond to the oil inlet and outlet passages and correspond to the air elimination groove, the termination position of the air elimination groove is before the position of the maximum accommodating cavity, and the termination position of the air elimination groove is before the position of the maximum accommodating cavity. The reaction supports the low-pressure oil duct to design an oil return hole, and the oil return hole is communicated with the oil inlet channel, so that redundant hydraulic oil in the control system can return to the oil pump, and the oil absorption efficiency of the oil pump is improved. The utility model discloses the oil pump can be realized directly alling oneself with torque converter. The hydraulic torque converter directly outputs the torque of the engine, so that the transmission efficiency and the stability of a hydraulic system are improved, and the service life of a friction pair in the gearbox is prolonged.

Description

Automatic transmission oil pump
Technical Field
The utility model relates to an automobile automatic gearbox technical field, in particular to automatic gearbox oil pump.
Background
An automatic Transmission (Auto Transmission) is the most reliable automatic Transmission at present, is mature in technology and smooth in gear shifting, and is widely used in middle and high-end vehicle models of various brands. The automatic transmission oil pump can reliably supply oil to the hydraulic torque converter, provides a power source for a hydraulic control system, and ensures the lubrication requirements of various friction pairs such as a planetary gear mechanism and the like, and is one of key parts related to the dynamic property, the economical efficiency, the comfort and the like of an automobile.
Because of the manufacturing requirement, gaps exist between the rotor of the oil pump and the pump body, and between the inner rotor and the outer rotor, the oil pump inevitably has the problems of leakage and noise, if the leakage is too large, the volumetric efficiency is reduced, the actual output flow of the oil pump is reduced, and the adverse effect similar to the reduction of the discharge capacity of the oil pump is generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic transmission oil pump to solve the problem that exists among the prior art.
The technical solution adopted for realizing the purpose of the present invention is that the automatic transmission oil pump comprises a reaction support assembly and an oil pump shell assembly which are mutually matched.
The center of the shell of the oil pump shell assembly is provided with a gear cavity. And an inner meshed driving gear and a driven gear are arranged in the gear cavity. The meshing line of the meshed driving gear and the meshed driven gear divides the cavity of the gear cavity into a low-pressure oil cavity and a high-pressure oil cavity. An oil inlet and an oil outlet are formed in the oil pump shell assembly. The low-pressure oil cavity is communicated with the oil inlet, and the high-pressure oil cavity is communicated with the oil outlet.
Gear chamber bottom surface is provided with shaft hole I to and encircle oil feed tank I and the oil groove I that sets up in shaft hole I. Two air-eliminating grooves I extend from the front end of the oil inlet groove I in the rotating direction of the driving gear. The front end of the air elimination groove I extends to the front of the position corresponding to the maximum interdental volume cavity. The drive gear has n teeth. The driven gear has (n +1) teeth. Tooth top clearances are formed between the driving gear and the driven gear. Two driving key teeth are symmetrically arranged on the peripheral wall of the inner hole of the driving gear. And the side wall of the pump wheel shaft sleeve of the hydraulic torque converter is provided with a driving clamping groove corresponding to the driving key teeth. The shaft sleeve of the pump wheel of the hydraulic torque converter is inserted into the inner hole of the driving gear, and the driving key teeth are clamped and embedded in the driving clamping groove. The drive gear rotates with the torque converter.
The reaction support assembly corresponds to the oil pump shell assembly and is connected with the oil pump shell assembly through a plurality of bolts. The reaction support assembly seals a gear cavity of the oil pump housing assembly. And the reaction support assembly is provided with a shaft hole II corresponding to the shaft hole I. And an oil inlet groove II corresponding to the oil inlet groove I is arranged on the reaction support assembly. And an oil outlet groove II corresponding to the oil outlet groove I is arranged on the reaction support assembly. And the reaction support assembly is provided with an air elimination groove II corresponding to the air elimination groove I.
Further, the number of teeth of the driving gear is 11, and the number of teeth of the driven gear is 12.
Furthermore, the thickness of the driven gear is 9-11 mm, and the thickness of the driving gear is 9-11 mm.
Furthermore, the diameter of the inner circle of the driven gear is 56-58 mm, the diameter of the outer circle of the driving gear is 61-63 mm, and the thickness of the outer circle of the driving gear is 9-11 mm.
Furthermore, an oil return hole is formed in the position II of the oil inlet groove. The oil return hole is communicated with the oil inlet.
The technical effects of the utility model are undoubted:
1. the oil pump is directly connected with the hydraulic torque converter, and the hydraulic torque converter can directly drive the oil pump to rotate. The hydraulic torque converter directly outputs the torque of the engine, so that the transmission efficiency is improved, the stability of a hydraulic system is improved, and the service life of a friction pair in the gearbox is prolonged;
2. because the oil passages of the reaction supporting assembly and the oil pump shell assembly adopt corresponding oil grooves, the corresponding air-eliminating grooves are arranged at the same time, and the termination positions of the air-eliminating grooves are arranged before the position of the maximum containing cavity, the oil can be absorbed all the time before the volume of the closed cavity reaches the maximum, the phenomenon of severe cavitation can be avoided, the vibration of the oil pump is reduced, and the fluid noise of the oil pump is improved;
3. an oil return hole is formed in the reaction support low-pressure cavity, redundant pressure oil in the control system is led back to the oil inlet, and the oil absorption efficiency of the oil pump is improved.
Drawings
FIG. 1 is a schematic diagram of an oil pump;
FIG. 2 is a schematic view of a reaction support assembly connection;
FIG. 3 is a schematic structural view of a gear cavity;
FIG. 4 is a schematic structural view of an oil pump housing assembly;
FIG. 5 is a schematic view of the reaction support assembly oil gallery.
In the figure: reaction support assembly 1, shaft hole II 101, oil feed tank II 102, go out oil tank II 103, the groove II 104 that disappears, oil gallery 105, oil pump shell assembly 2, gear chamber 201, shaft hole I202, oil feed tank I203, go out oil tank I204, the groove I205 that disappears, drive gear 3, drive key tooth 301, driven gear 4, bolt 5, oil inlet 10, oil-out 11.
Detailed Description
The present invention will be further described with reference to the following examples, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and modifications can be made without departing from the technical spirit of the invention and according to the common technical knowledge and conventional means in the field, and all shall be included in the scope of the invention.
Example 1:
referring to fig. 1, the present embodiment discloses an automatic transmission oil pump including a reaction support assembly 1 and an oil pump housing assembly 2 that cooperate with each other.
The center of the shell of the oil pump shell assembly 2 is provided with a gear cavity 201. And a driving gear 3 and a driven gear 4 which are meshed with each other are arranged in the gear cavity 201. The meshing line of the internally meshed driving gear 3 and the driven gear 4 divides the cavity of the gear cavity into a low-pressure oil cavity and a high-pressure oil cavity. An oil inlet 10 and an oil outlet 11 are arranged on the oil pump shell assembly 2. The low-pressure oil chamber is communicated with the oil inlet 10, and the high-pressure oil chamber is communicated with the oil outlet 11.
Referring to fig. 3 and 4, a shaft hole i 202, an oil inlet groove i 203 and an oil outlet groove i 204 are formed in the bottom surface of the gear cavity 201 and surround the shaft hole i 202. Two air-absorbing grooves I205 extend out of the front end of the oil inlet groove I203 in the rotating direction of the driving gear 3. The front end of the air elimination groove I205 extends to the front of the corresponding position of the maximum interdental volume cavity. The drive gear 3 has n teeth. The driven gear 4 has n +1 teeth. In the present embodiment, the number of teeth of the driving gear 3 is 11, and the number of teeth of the driven gear 4 is 12. The thickness of the driven gear 4 is 9-11 mm, and the thickness of the driving gear 3 is 9-11 mm. The diameter of the addendum circle of the moving gear 4 is 56-58 mm, and the diameter of the addendum circle of the driving gear 3 is 61-63 mm. Tooth top clearances are formed between the driving gear 3 and the driven gear 4. Two driving key teeth 301 are symmetrically arranged on the peripheral wall of the inner hole of the driving gear 3. And the side wall of the pump hub of the torque converter is provided with a driving clamping groove corresponding to the driving key teeth 301. The pump wheel shaft sleeve of the hydraulic torque converter is inserted into the inner hole of the driving gear 3, and the driving key teeth 301 are clamped and embedded in the driving clamping grooves. The drive gear 3 rotates together with the torque converter.
Referring to fig. 2, the reaction support assembly 1 corresponds to the oil pump housing assembly 2 and is connected to the oil pump housing assembly 2 by a plurality of bolts 5. The reaction support assembly 1 closes the gear cavity 201 of the oil pump housing assembly 2. Referring to fig. 5, the reaction support assembly 1 is provided with a shaft hole ii 101 corresponding to the shaft hole i 202. And an oil inlet groove II 102 corresponding to the oil inlet groove I203 is arranged on the reaction support assembly 1. And an oil outlet groove II 103 corresponding to the oil outlet groove I204 is arranged on the reaction supporting assembly 1. And a degassing groove II 104 corresponding to the degassing groove I205 is arranged on the reaction support assembly 1. The end position of the degassing groove is in front of the position of the maximum containing cavity, so that the oil can be absorbed all the time before the volume of the closed cavity reaches the maximum, the phenomenon of severe cavitation can be avoided, the vibration of the oil pump is reduced, and the fluid noise of the oil pump is improved. And an oil return hole is formed in the oil inlet groove II 102. The oil return hole 105 is communicated with the oil inlet 10. When the oil pump works, redundant transmission oil at the oil inlet 10 can return to the oil tank rapidly through the oil return hole 105, so that redundant hydraulic oil in the control system can return to the oil pump, and the oil absorption efficiency of the oil pump is improved.
When the driving gear 3 is meshed with the driven gear 4, the driving gear, the oil pump shell assembly 2 and the reaction support assembly 1 form a closed cavity, an oil inlet channel is formed by an oil inlet port of the oil pump and the closed cavity, and an oil outlet channel is formed by an oil outlet port of the oil pump and the closed cavity. When the hydraulic torque converter rotates, the oil pump is driven to work. The driving gear 3 and the driven gear 4 are meshed to rotate in the same direction, and the volume of the formed sealed cavity is changed continuously. When the gear rotates in the anticlockwise direction, the volume of the oil inlet channel sealing cavity is changed from small to large, partial vacuum is formed, and oil is sucked from the oil inlet channel. The volume of the oil outlet passage sealing cavity is reduced from large to small, and oil is discharged from the oil outlet passage to achieve the purpose of conveying the oil. The pressure oil is sucked and discharged by changing the volume of a sealed chamber formed by the meshed gears and the housing having the suction port and the discharge port. The oil pump is directly driven by the hydraulic torque converter and can continuously provide required pressure oil for the gearbox.
Example 2:
the embodiment discloses an automatic transmission oil pump, which comprises a reaction supporting assembly 1 and an oil pump shell assembly 2 which are matched with each other.
The center of the shell of the oil pump shell assembly 2 is provided with a gear cavity 201. And a driving gear 3 and a driven gear 4 which are meshed with each other are arranged in the gear cavity 201. The meshing line of the internally meshed driving gear 3 and the driven gear 4 divides the cavity of the gear cavity into a low-pressure oil cavity and a high-pressure oil cavity. An oil inlet 10 and an oil outlet 11 are arranged on the oil pump shell assembly 2. The low-pressure oil chamber is communicated with the oil inlet 10, and the high-pressure oil chamber is communicated with the oil outlet 11.
The gear chamber 201 bottom surface is provided with shaft hole I202 to and encircle oil feed tank I203 and the oil outlet groove I204 that shaft hole I202 set up. Two air-absorbing grooves I205 extend out of the front end of the oil inlet groove I203 in the rotating direction of the driving gear 3. The front end of the air elimination groove I205 extends to the front of the corresponding position of the maximum interdental volume cavity. The drive gear 3 has n teeth. The driven gear 4 has n +1 teeth. Tooth top clearances are formed between the driving gear 3 and the driven gear 4. Two driving key teeth 301 are symmetrically arranged on the peripheral wall of the inner hole of the driving gear 3. And the side wall of the pump hub of the torque converter is provided with a driving clamping groove corresponding to the driving key teeth 301. The pump wheel shaft sleeve of the hydraulic torque converter is inserted into the inner hole of the driving gear 3, and the driving key teeth 301 are clamped and embedded in the driving clamping grooves. The drive gear 3 rotates together with the torque converter.
The reaction support assembly 1 corresponds to the oil pump housing assembly 2 and is connected with the oil pump housing assembly 2 through a plurality of bolts 5. The reaction support assembly 1 closes the gear cavity 201 of the oil pump housing assembly 2. And the reaction supporting assembly 1 is provided with a shaft hole II 101 corresponding to the shaft hole I202. And an oil inlet groove II 102 corresponding to the oil inlet groove I203 is arranged on the reaction support assembly 1. And an oil outlet groove II 103 corresponding to the oil outlet groove I204 is arranged on the reaction supporting assembly 1. And a degassing groove II 104 corresponding to the degassing groove I205 is arranged on the reaction support assembly 1.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, wherein the number of teeth of the driving gear 3 is 11, and the number of teeth of the driven gear 4 is 12.
Example 4:
the main structure of the present embodiment is the same as that of embodiment 2, wherein the thickness of the driven gear 4 is 9-11 mm, and the thickness of the driving gear 3 is 9-11 mm.
Example 5:
the main structure of the present embodiment is the same as that of embodiment 2, wherein the diameter of the inner circle of the driven gear 4 is 56-58 mm, and the diameter of the outer circle of the driving gear 3 is 61-63 mm.
Example 6:
the main structure of this embodiment is the same as that of embodiment 2, wherein an oil return hole 105 is formed in the oil inlet groove ii 102. The oil return hole 105 is communicated with the oil inlet 10.

Claims (5)

1. An automatic transmission oil pump characterized by: comprises a reaction support assembly (1) and an oil pump shell assembly (2) which are matched with each other;
a gear cavity (201) is arranged in the center of the shell of the oil pump shell assembly (2); a driving gear (3) and a driven gear (4) which are meshed with each other are arranged in the gear cavity (201); the meshing line of the internally meshed driving gear (3) and the driven gear (4) divides the cavity of the gear cavity into a low-pressure oil cavity and a high-pressure oil cavity; an oil inlet (10) and an oil outlet (11) are arranged on the oil pump shell assembly (2); the low-pressure oil cavity is communicated with the oil inlet (10), and the high-pressure oil cavity is communicated with the oil outlet (11);
the bottom surface of the gear cavity (201) is provided with a shaft hole I (202), and an oil inlet groove I (203) and an oil outlet groove I (204) which are arranged around the shaft hole I (202); the front end of the oil inlet groove I (203) in the rotating direction of the driving gear (3) extends out of two air elimination grooves I (205); the front end of the degassing groove I (205) extends to the front of the position corresponding to the maximum interdental volume cavity; the drive gear (3) has n teeth; the driven gear (4) has (n +1) teeth; tooth top clearances are formed between the driving gear (3) and the driven gear (4); two driving key teeth (301) are symmetrically arranged on the peripheral wall of an inner hole of the driving gear (3); the side wall of the pump wheel shaft sleeve of the hydraulic torque converter is provided with a driving clamping groove corresponding to the driving key teeth (301); the pump wheel shaft sleeve of the hydraulic torque converter is inserted into an inner hole of the driving gear (3), and the driving key teeth (301) are clamped and embedded in the driving clamping grooves; the driving gear (3) rotates along with the hydraulic torque converter;
the reaction support assembly (1) corresponds to the oil pump shell assembly (2) and is connected with the oil pump shell assembly (2) through a plurality of bolts (5); the reaction support assembly (1) seals a gear cavity (201) of the oil pump housing assembly (2); the reaction support assembly (1) is provided with a shaft hole II (101) corresponding to the shaft hole I (202); an oil inlet groove II (102) corresponding to the oil inlet groove I (203) is arranged on the reaction support assembly (1); an oil outlet groove II (103) corresponding to the oil outlet groove I (204) is arranged on the reaction support assembly (1); and a degassing groove II (104) corresponding to the degassing groove I (205) is arranged on the reaction support assembly (1).
2. The automatic transmission oil pump according to claim 1, characterized in that: the number of teeth of the driving gear (3) is 11, and the number of teeth of the driven gear (4) is 12.
3. The automatic transmission oil pump according to claim 1, characterized in that: the thickness of the driven gear (4) is 9-11 mm, and the thickness of the driving gear (3) is 9-11 mm.
4. The automatic transmission oil pump according to claim 1, characterized in that: the diameter of the inner circle of the driven gear (4) is 56-58 mm, and the diameter of the outer circle of the driving gear (3) is 61-63 mm.
5. The automatic transmission oil pump according to claim 1, characterized in that: an oil return hole (105) is formed in the oil inlet groove II (102); the oil return hole (105) is communicated with the oil inlet (10).
CN201921432825.5U 2019-08-30 2019-08-30 Automatic transmission oil pump Active CN210799344U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921432825.5U CN210799344U (en) 2019-08-30 2019-08-30 Automatic transmission oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921432825.5U CN210799344U (en) 2019-08-30 2019-08-30 Automatic transmission oil pump

Publications (1)

Publication Number Publication Date
CN210799344U true CN210799344U (en) 2020-06-19

Family

ID=71244029

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921432825.5U Active CN210799344U (en) 2019-08-30 2019-08-30 Automatic transmission oil pump

Country Status (1)

Country Link
CN (1) CN210799344U (en)

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