Bidirectional oil pump structure of automobile transmission

Abstract

The utility model belongs to the field of automobile transmission lubrication, and discloses an automobile transmission two-way oil pump structure which comprises a shell, an oil suction port end cover is arranged at one end of the shell through a bolt, an oil outlet end cover is arranged at the other end of the shell through a bolt, a transmission device is movably arranged on the inner wall of the shell, and a plugging device is movably arranged on the inner wall of the shell. The problem that in the prior art, stable supply of lubricating oil cannot be guaranteed possibly under complex working conditions such as frequent advancing and retreating of a vehicle, and then the performance of a transmission is affected is solved. Meanwhile, a lubricating system of an existing automobile transmission mainly adopts a gear oil splashing lubrication mode to lubricate all parts in a gearbox, the system requires a large filling amount of gear oil, the gearbox is large in oil stirring loss and low in transmission efficiency, and meanwhile under the special working conditions such as frequent advancing and retreating, the transmission efficiency is high. And the automobile transmission lubricating oil is suitable for lubricating the automobile transmission.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile transmission lubrication, specifically to a two-way oil pump structure of automobile transmission. BACKGROUND

[0002] During the working process of the automobile transmission, the internal parts need to be fully and stably lubricated to ensure normal operation and service life. The traditional transmission lubrication system has certain limitations. For example, under complex working conditions such as frequent forward and reverse movement of the vehicle, it may not be able to ensure stable supply of lubricating oil, thereby affecting the performance of the transmission. At the same time, the existing lubrication system of the automobile transmission mainly adopts the splash lubrication mode of gear oil to lubricate each part in the transmission case. Such a system requires a large amount of gear oil to be filled, has large oil stirring loss of the transmission case, and has low transmission efficiency. At the same time, under special working conditions such as frequent forward and reverse movement, the internal parts of the transmission cannot be fully lubricated, resulting in early failure of the transmission. Therefore, through CAE lubrication simulation and test verification, a two-way oil pump structure of the transmission is designed, and the active lubrication system with the structure can well solve the above problems. SUMMARY

[0003] The utility model intends to provide a two-way oil pump structure of automobile transmission to solve the problem that the prior art may not be able to ensure stable supply of lubricating oil under complex working conditions such as frequent forward and reverse movement of the vehicle, thereby affecting the performance of the transmission. At the same time, the existing lubrication system of the automobile transmission mainly adopts the splash lubrication mode of gear oil to lubricate each part in the transmission case. Such a system requires a large amount of gear oil to be filled, has large oil stirring loss of the transmission case, and has low transmission efficiency. At the same time, under special working conditions such as frequent forward and reverse movement, the internal parts of the transmission cannot be fully lubricated, resulting in early failure of the transmission.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a two-way oil pump structure of automobile transmission, including the casing, the one end bolt of casing is equipped with the oil inlet end cover, the other end bolt of casing is equipped with the oil outlet end cover, the inner wall of casing is equipped with transmission device, the inner wall of casing is equipped with plugging device;

[0006] The inner wall of oil inlet end cover and oil outlet end cover is equipped with oil suction hole symmetrically, one end of oil suction hole is equipped with valve hole, one end of valve hole is fixedly equipped with oil groove, one end of oil groove is equipped with spring hole, one end of spring hole is equipped with oil outlet hole.

[0007] Further, the shell comprises an oil pump rotor end cover, an oil pump end cover is arranged above the oil pump rotor end cover, oil port end cover bolts grooves are symmetrically arranged on both sides of the oil pump rotor end cover and the oil pump end cover, and oil pump bolt grooves are symmetrically arranged on both sides of the oil pump rotor end cover and the oil pump end cover.

[0008] Further, the transmission device comprises an inner rotor driving shaft movably arranged on the surface of the oil pump rotor end cover, an oil pump inner rotor is fixedly arranged on the surface of the inner rotor driving shaft, and an oil pump outer rotor is movably arranged above the oil pump inner rotor.

[0009] Further, the oil pump rotor end cover and the oil pump end cover are symmetrically provided with a waist-shaped groove.

[0010] Further, the sealing device comprises a ball valve spring fixedly arranged at one end of the inner wall of the spring hole, an oil way one-way ball valve is fixedly arranged at the other end of the ball valve spring, and the one-way ball valve is matched with the valve hole at one end.

[0011] Further, the oil port end cover bolt grooves are provided with oil port end cover mounting bolts, and the oil pump bolt grooves are provided with oil pump mounting bolts.

[0012] The beneficial effects of the technical scheme are as follows.

[0013] (1) Under various complex and frequent forward and reverse special working conditions of the whole vehicle, the oil pump can provide oil for the transmission active lubrication system, so that the transmission active lubrication system can normally work in forward and reverse directions, the transmission active lubrication system with the bidirectional oil pump can reduce the use amount of lubricating oil under the condition of meeting the lubrication, and the transmission efficiency and the use economy of the whole vehicle are improved.

[0014] (2) The transmission active lubrication system with the bidirectional oil pump can accurately control the flow and distribution of oil, and the use amount of lubricating oil can be reduced under the condition of meeting the lubrication demand of the internal parts of the transmission, and the running resistance of the transmission caused by too much lubricating oil is reduced.

[0015] (3) By reducing the use amount of lubricating oil and ensuring good lubrication of the transmission under complex working conditions, the transmission efficiency is improved, and the use economy of the whole vehicle is improved, and the running cost of the vehicle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 Fig. 1 is a structural schematic view of one of the bidirectional oil pump structures of the automobile transmission according to the present application;

[0017] Fig. 2 Fig. 2 is a structural schematic view of another bidirectional oil pump structure of the automobile transmission according to the present application;

[0018] Fig. 3An internal structure schematic view of a two-way oil pump structure of an automobile transmission is provided in the utility model.

[0019] Fig. 4 An internal plane structure schematic view of a two-way oil pump structure of an automobile transmission is provided in the utility model.

[0020] Fig. 5 An anticlockwise rotation working principle schematic view of an oil pump in a two-way oil pump structure of an automobile transmission is provided in the utility model.

[0021] Fig. 6 A clockwise rotation working principle schematic view of an oil pump in a two-way oil pump structure of an automobile transmission is provided in the utility model.

[0022] The names of corresponding marks in the drawings are as follows: 1, shell; 2, oil suction port end cover; 3, oil outlet end cover; 4, transmission device; 5, plugging device; 6, oil port end cover mounting bolt; 7, oil pump mounting bolt; 101, oil pump rotor end cover; 102, oil pump end cover; 103, oil port end cover bolt groove; 104, oil pump bolt groove; 201, oil suction hole; 202, valve hole; 203, oil groove; 204, spring hole; 205, oil outlet hole; 401, inner rotor driving shaft; 402, oil pump inner rotor; 403, oil pump outer rotor; 404, waist-shaped groove; 501, ball valve spring; 502, oil way one-way ball valve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Embodiment one

[0025] Please refer to Figs. 1-6The utility model provides a technical scheme: a kind of automobile transmission bidirectional oil pump structure, oil suction port end cover 2, oil pump mounting bolt 7, inner rotor drive shaft 401, oil outlet end cover 3, ball valve spring 501, oil port end cover mounting bolt 6, oil way one-way ball valve 502, oil pump rotor end cover 101, oil pump inner rotor 402, oil pump outer rotor 403, shell 1, oil suction port end cover 2 is connected with shell 1 oil inlet end by bolt, two oil way one-way ball valves 502 of oil suction end are respectively installed to two valve holes 202 of oil suction port end cover 2, the bottom hole of valve hole 202 is conical surface, conical surface is used to limit oil way one-way ball valve 502 and mutually cooperate sealing oil way with oil way one-way ball valve 502 limit, valve hole 202 depth is greater than the diameter of oil way one-way ball valve 502, valve hole 202 hole wall has oil groove 203, oil groove 203 depth is less than valve hole 202 depth and greater than the radius of oil way one-way ball valve 502, valve hole 202 is cooperated with the small gap of oil way one-way ball valve 502, oil groove 203 is communicated with valve hole 202 and cannot affect the guiding effect of valve hole 202 to oil way one-way ball valve 502 in valve hole 202, oil suction hole 201 on oil suction port end cover 2 is coaxial with valve hole 202 and is communicated with the bottom hole conical surface of valve hole 202, oil suction hole 201 diameter is less than the diameter of oil way one-way ball valve 502, corresponding ball valve spring 501 of two oil way one-way ball valves 502 of oil suction end is respectively installed on spring hole 204 on shell 1, spring hole 204 is coaxial with valve hole 202, spring hole 204 is cooperated with the small gap of ball valve spring 501, oil groove 203 is also installed in spring hole 204 inner wall, oil groove 203 is communicated with spring hole 204 and valve hole 202 oil groove 203 and cannot affect the guiding effect of spring hole 204 to ball valve spring 501 in spring hole 204 compression rebound, spring hole 204 diameter is less than the diameter of oil way one-way ball valve 502, spring hole 204 end face is used for oil way one-way ball valve 502 in valve hole 202 moves another direction limit, there are two oil outlet holes 205 on shell 1 respectively with two spring holes 204 coaxial and pass through and are respectively communicated with two mirror image waists 404 on shell 1, oil outlet hole 205 diameter is less than the inner diameter of ball valve spring 501, spring hole 204 and oil outlet hole 205 form stepped hole for ball valve spring 501 limit, oil pump inner rotor 402 and oil pump outer rotor 403 are installed to rotor hole in shell 1, inner rotor drive shaft 401 one end is connected oil pump inner rotor 402, and the other end passes through the drive shaft hole of shell 1 and is connected with transmission internal gear shaft spare or independent drive motor, wherein, inner rotor drive shaft 401 is coaxial with oil pump inner rotor 402, and oil pump outer rotor 403 is installed relative to the eccentricity of inner rotor drive shaft 401 and oil pump inner rotor 402, oil pump rotor end cover 101 is connected with oil pump end cover 102 by oil pump mounting bolt 7 and installs fixed bidirectional oil pump, the stopper on shell 1 with inner rotor drive shaft 401 coaxial is used for the positioning of bidirectional oil pump, oil pump rotor end cover 101 is used for the axial limit of oil pump inner rotor 402 and oil pump outer rotor 403 and seals the oil in the rotor hole in shell 1;

[0026] The implementation process is as follows:

[0027] When the bidirectional oil pump is working, the internal gear shaft of the transmission or the independent driving motor drives the inner rotor driving shaft 401 to rotate, which makes the inner meshing cycloid gear pump rotate. One of the two waist-shaped grooves 404 on the shell 1 forms a negative pressure, and the other forms a positive pressure. The oil way one-way ball valve 502 of the oil inlet end cover 2 connected with the negative pressure waist-shaped groove 404 compresses the matched ball valve spring 501 and moves in the matched valve hole 202. The taper surface of the valve hole 202 cannot be sealed with the oil way one-way ball valve 502 to form a gap, and the gear oil is sucked from the oil inlet hole 201 into the oil groove 203 connected with the gap, the valve hole 202 and the spring hole 204, and then to the waist-shaped groove 404 forming a negative pressure through the oil outlet hole 205. The oil way one-way ball valve 502 of the shell 1 connected with the negative pressure waist-shaped groove 404 is tightly contacted with the taper surface of the valve hole 202 to form a seal under the action of the elastic force of the matched ball valve spring 501 and the negative pressure. The oil way one-way ball valve 502 of the shell 1 connected with the positive pressure waist-shaped groove 404 compresses the matched ball valve spring 501 and moves in the matched valve hole 202. The taper surface of the valve hole 202 cannot be sealed with the oil way one-way ball valve 502 to form a gap, and the gear oil flows from the oil groove 203 through the oil outlet hole 205, the oil groove 203 connected with the gap, the valve hole 202 and the spring hole 204, and then to the oil discharge hole to discharge the gear oil. The oil way one-way ball valve 502 of the oil inlet end cover 2 connected with the positive pressure waist-shaped groove 404 is tightly contacted with the taper surface of the valve hole 202 to form a seal under the action of the elastic force of the matched ball valve spring 501 and the oil pressure. When the rotating direction of the inner rotor driving shaft 401 changes, the oil groove 203 forming a negative pressure will form a positive pressure, and the oil groove 203 forming a positive pressure will form a negative pressure. The oil way one-way ball valve 502 of the oil inlet end cover 2 and the oil pump outlet changes from opening to closing and from closing to opening. The gear oil pumped out through the oil way fully lubricates each part inside the transmission, so that the transmission can adapt to various complex working conditions and road conditions, and the lubricating oil consumption is reduced, and the working efficiency of the transmission is improved.

[0028] Example two:

[0029] Please refer to Figs. 1-6The utility model provides a technical scheme: a kind of automobile transmission bidirectional oil pump structure, including shell 1, shell 1 includes oil pump rotor end cover 101, oil pump rotor end cover 101 top installs oil pump end cover 102, oil pump rotor end cover 101 and oil pump end cover 102 two sides symmetrical installation oil port end cover bolt groove 103, oil pump rotor end cover 101 and oil pump end cover 102 two sides symmetrical installation oil pump bolt groove 104, shell 1 one end bolt installation suction port end cover 2, suction port end cover 2 and oil outlet end cover 3 inner wall are all symmetrically provided with suction hole 201, suction hole 201 is one of the entrance of lubricating oil into oil pump, suction hole 201 one end is provided with valve hole 202, valve hole 202 is used for installing the relevant components of plugging device 5, and it plays a key role in oil flow control, valve hole 202 one end is fixedly provided with oil groove 203, oil groove 203 provides passageway for the flow of oil, oil groove 203 one end is provided with spring hole 204, spring hole 204 is used for installing ball valve spring 501, spring hole 204 one end is provided with oil outlet hole 205, shell 1 other end bolt installation oil outlet end cover 3, shell 1 inner wall movably installs transmission device 4, transmission device 4 includes the inner rotor drive shaft 401 movably installed on the surface of oil pump rotor end cover 101, the inner rotor drive shaft 401 surface fixedly installs oil pump inner rotor 402, oil pump inner rotor 402 top movably installs oil pump outer rotor 403, the inner rotor drive shaft 401 is rotated under the drive of external power (such as transmission internal gear shaft piece or independent drive motor), drives oil pump inner rotor 402 and oil pump outer rotor 403 to rotate, forms the working form of internal meshing cycloid gear pump, oil pump rotor end cover 101 and oil pump end cover 102 inner wall are all symmetrically provided with waist slot 404, in the process of oil pump work, waist slot 404 will produce pressure change with the rotation of inner rotor and outer rotor, forms negative pressure or positive pressure area, to realize the suction and discharge of oil, shell 1 inner wall movably installs plugging device 5, plugging device 5 includes ball valve spring 501 fixedly installed in the inner wall one end of spring hole 204, ball valve spring 501 other end fixedly installs oil way one-way ball valve 502, oil way one-way ball valve 502 one end is adapted with valve hole 202, ball valve spring 501 and oil way one-way ball valve 502 cooperate, according to oil pressure and the pressure state of waist slot 404, control the one-way flow of oil between suction hole 201, valve hole 202, oil groove 203, spring hole 204 and oil outlet 205, ensure that oil flows according to predetermined direction, realize the oil suction and oil discharge function of oil pump, transmission device 4 and plugging device 5 are movably arranged in the inner wall of shell 1, cooperate to realize the oil suction and oil discharge function of oil pump, oil port end cover bolt groove 103 inner bolt installation oil port end cover mounting bolt 6, oil pump bolt groove 104 inner bolt installation oil pump mounting bolt 7, oil pump rotor end cover 101 and oil pump end cover 102 are connected by the oil port end cover bolt groove 103 and oil port end cover mounting bolt 6 of two sides symmetrical settings oil port end cover 2 and oil outlet end cover 3,The oil pump rotor end cover 101 is connected with the oil pump end cover 102 through the oil pump bolt groove 104 and the oil pump mounting bolt 7 arranged symmetrically on both sides.

[0030] The implementation process is as follows:

[0031] First, the inner rotor drive shaft 401 is installed on the surface of the oil pump rotor end cover 101, ensuring that it can rotate freely, then the oil pump inner rotor 402 is fixedly installed on the surface of the inner rotor drive shaft 401, and then the oil pump outer rotor 403 is placed above the oil pump inner rotor 402, forming an internal meshing structure with the oil pump inner rotor 402.

[0032] The ball valve spring 501 is installed on one end of the inner wall of the spring hole 204 of the oil inlet end cover 2 and the oil outlet end cover 3, and then the oil way one-way ball valve 502 is installed on the other end of the ball valve spring 501, ensuring that the oil way one-way ball valve 502 can move freely in the valve hole 202 under the action of the ball valve spring 501.

[0033] The oil inlet end cover 2 is installed in the oil port end cover bolt groove 103 on one end of the shell 1 through the oil port end cover mounting bolt 6, ensuring tight connection. Similarly, the oil outlet end cover 3 is installed in the oil port end cover bolt groove 103 on the other end of the shell 1 through the oil port end cover mounting bolt 6.

[0034] Finally, the oil pump rotor end cover 101 and the oil pump end cover 102 are connected through the oil pump bolt groove 104 using the oil pump mounting bolt 7, completing the assembly of the entire oil pump structure.

[0035] After the vehicle starts, when the transmission starts to work, external power is transmitted to the inner rotor drive shaft 401, causing it to start rotating, which in turn drives the oil pump inner rotor 402 and the oil pump outer rotor 403 to rotate, and the oil pump starts to work.

[0036] During the operation of the oil pump, according to the rotation direction of the inner rotor and the outer rotor and the pressure change in the waist-shaped groove 404, the oil way one-way ball valve 502 of the sealing device 5 automatically controls the suction and discharge of oil under the cooperation of the ball valve spring 501, ensuring that the transmission is supplied with stable lubricating oil.

[0037] During the vehicle driving process, whether it is forward or backward, when the working condition changes and the rotation direction of the inner rotor drive shaft 401 changes, the oil pump can automatically adapt, through the switching of the oil way one-way ball valve 502, to ensure the correct supply direction of the lubricating oil and maintain the normal lubrication of the transmission.

[0038] Working principle: when the automobile transmission works, the external power such as the transmission internal gear shaft or the independent drive motor drives the inner rotor driving shaft 401 to rotate, and the inner rotor driving shaft 401 drives the oil pump inner rotor 402 to rotate. Since the oil pump inner rotor 402 and the oil pump outer rotor 403 are in meshing structure, the oil pump outer rotor 403 also rotates.

[0039] The oil suction process is taken as an example of rotation in a certain direction: with the rotation of the inner rotor and the outer rotor, a negative pressure area and a positive pressure area are formed in the waist-shaped groove 404 of the inner wall of the oil pump end cover 102. Assuming that the waist-shaped groove 404 area connected with the oil suction port end cover 2 forms a negative pressure, under the action of the negative pressure, the oil way one-way ball valve 502 in the oil suction port end cover 2 overcomes the elastic force of the ball valve spring 501 and moves to the spring hole 204 direction, so that a gap is generated between the oil way one-way ball valve 502 and the valve hole 202, the lubricating oil enters from the oil suction hole 201, passes through the gap between the valve hole 202 and the oil way one-way ball valve 502, flows into the oil groove 203, and finally enters the waist-shaped groove 404 area forming the negative pressure. At this time, the corresponding oil way one-way ball valve 502 in the oil outlet port end cover 3 tightly adheres to the valve hole 202 under the action of the elastic force of the ball valve spring 501 and the oil pressure, preventing the oil from flowing out of the oil outlet port end cover 3.

[0040] The oil discharge process is taken as an example of rotation in a certain direction: when the waist-shaped groove 404 area connected with the oil outlet port end cover 3 forms a positive pressure, the oil way one-way ball valve 502 in the oil outlet port end cover 3 moves to the spring hole 204 direction under the action of the oil pressure, overcoming the elastic force of the ball valve spring 501, so that a gap is generated between the oil way one-way ball valve 502 and the valve hole 202. The lubricating oil flows from the waist-shaped groove 404 through the oil outlet hole 205, flows into the spring hole 204, and then flows out of the oil outlet hole 205 of the oil outlet port end cover 3 through the gap between the oil groove 203 and the valve hole 202 and the oil way one-way ball valve 502. At this time, the corresponding oil way one-way ball valve 502 in the oil suction port end cover 2 tightly adheres to the valve hole 202 under the action of the elastic force of the ball valve spring 501 and the oil pressure, preventing the oil from entering from the oil suction port end cover 2.

[0041] When the working condition is switched, the working condition is as follows: when the working state of the automobile transmission changes, the rotation direction of the inner rotor driving shaft 401 changes, and the negative pressure and positive pressure areas of the waist-shaped groove 404 also change accordingly. At this time, the oil way one-way ball valves 502 in the oil suction port end cover 2 and the oil outlet port end cover 3 will automatically switch the opening and closing states according to the pressure change, realizing the change of the oil flow direction, so as to ensure that stable lubricating oil supply can be provided for the transmission under different working conditions such as forward and reverse driving of the automobile.

[0042] The above only is the embodiment of the present application, and the well-known specific technical solutions or common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A structure of a bidirectional oil pump for an automobile transmission, characterized by: Including shell (1), the shell (1) one end bolt is equipped with oil suction end cover (2), the shell (1) other end bolt is equipped with oil outlet end cover (3), the shell (1) inner wall is equipped with transmission (4) movably, the shell (1) inner wall is equipped with blocking device (5) movably, The oil suction end cover (2) and the oil outlet end cover (3) inner wall are all symmetrically provided with oil suction hole (201), the oil suction hole (201) one end is provided with valve hole (202), the valve hole (202) one end is fixedly provided with oil groove (203), the oil groove (203) one end is provided with spring hole (204), the spring hole (204) one end is provided with oil outlet hole (205).

2. The structure of a bidirectional oil pump of an automobile transmission according to claim 1, characterized in that: The shell (1) includes oil pump rotor end cover (101), the oil pump rotor end cover (101) is provided with oil pump end cover (102) above, the oil pump rotor end cover (101) and the oil pump end cover (102) both sides are symmetrically provided with oil port end cover bolt groove (103), the oil pump rotor end cover (101) and the oil pump end cover (102) both sides are symmetrically provided with oil pump bolt groove (104).

3. The structure of a bidirectional oil pump of an automobile transmission according to claim 2, characterized in that: The transmission (4) includes inner rotor drive shaft (401) movably installed on the surface of the oil pump rotor end cover (101), the inner rotor drive shaft (401) surface is fixedly provided with oil pump inner rotor (402), the oil pump inner rotor (402) is movably provided with oil pump outer rotor (403) above.

4. The structure of a bidirectional oil pump of an automobile transmission according to claim 3, characterized in that: The oil pump rotor end cover (101) and the oil pump end cover (102) inner wall are all symmetrically provided with waist-shaped groove (404).

5. The structure of a bidirectional oil pump of an automobile transmission according to claim 1, characterized in that: The blocking device (5) includes ball valve spring (501) fixedly installed on the inner wall one end of the spring hole (204), the ball valve spring (501) other end is fixedly provided with oil way one-way ball valve (502), the oil way one-way ball valve (502) one end is matched with the valve hole (202).

6. The structure of a bidirectional oil pump of an automobile transmission according to claim 2, characterized in that: The oil port end cover bolt groove (103) is bolted with oil port end cover mounting bolt (6), the oil pump bolt groove (104) is bolted with oil pump mounting bolt (7).

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