CN216923150U - Transmission integrated independent oil circuit structure and gearbox - Google Patents

Abstract

The utility model belongs to the technical field of automobile transmissions, and particularly relates to a transmission integrated independent oil circuit structure and a transmission. The transmission integrated independent oil circuit structure comprises an inner bushing, a rotating shaft provided with a first shaft hole and a shell provided with a mounting hole; the inner bushing is arranged in the mounting hole, and the rotating shaft is rotatably arranged in the inner bushing; the shell is provided with a first flow passage hole, a second flow passage hole and a third flow passage hole communicated with the second flow passage hole; the second flow passage hole and the third flow passage hole constitute a first oil passage; the first flow passage hole and the first shaft hole constitute a second oil passage. The transmission integrated independent oil way structure is provided with at least two independent oil ducts in a limited space, each independent oil duct can be provided with a large flow area and can bear high oil pressure, and the contradiction between the performance of the oil ducts and the small installation space is solved.

Description

Transmission integrated independent oil circuit structure and gearbox

Technical Field

The utility model belongs to the technical field of automobile transmissions, and particularly relates to a transmission integrated independent oil way structure and a transmission case.

Background

The gear shifting structure of the automatic gearbox of the automobile is mostly controlled by a clutch, and in the gearbox with a plurality of clutches, each clutch needs a separate oil path to control the disengagement and combination of the clutch; the engagement of the clutch usually requires a large oil pressure, and the disengagement of the clutch also has a time requirement, so that an oil passage of the clutch is required to be capable of bearing the large oil pressure and needs a certain flow area, and therefore, the hole diameter required to be arranged in the oil passage of the clutch is large, and the requirement on space is large. However, most of the clutches are arranged on the same rotating shaft, and a gear, a bearing and other components are also mounted on the rotating shaft; due to the rotary motion of the gear and the clutch, the oil passage is only suitable to be arranged at the position where the shaft center of the rotating shaft does not rotate or the rotating speed is slow, and the positions are limited by the rotating bearings, the gear and other parts, so that a large installation space is not provided, and the contradiction between the flow area of the oil passage and the installation space is difficult to solve.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that the contradiction between the installation space of each part on the transmission and the flow area of an oil passage in the prior art is difficult to solve, and provides an integrated independent oil way structure of the transmission and the transmission.

In view of the above problems, an embodiment of the present invention provides an integrated independent oil path structure for a transmission, including an inner bushing, a rotating shaft provided with a first shaft hole, and a housing having a mounting hole; the inner bushing is arranged in the mounting hole, and the rotating shaft is rotatably arranged in the inner bushing; the shell is provided with a first flow passage hole, a second flow passage hole and a third flow passage hole communicated with the second flow passage hole;

the second flow passage hole and the third flow passage hole constitute a first oil passage; the first flow passage hole and the first shaft hole constitute a second oil passage.

Optionally, a fourth flow passage hole is further formed in the housing, a second shaft hole communicated with the fourth flow passage hole is formed in the rotating shaft, and a center line of the first shaft hole is parallel to a center line of the second shaft hole;

the fourth flow passage hole and the second shaft hole constitute a third oil passage.

Optionally, the fourth runner hole is arranged at a first preset angle with the center line of the rotating shaft; the inner wall of the mounting hole is sunken to form a first groove, and the first groove is blocked by the outer wall of the inner bushing to form a first oil passage; the first flow passage hole is communicated with the second shaft hole through the first oil passing passage.

Optionally, the first shaft hole and the second shaft hole are communicated; the transmission integrated independent oil way structure further comprises a plug which is installed in the second shaft hole and used for separating the second shaft hole from the first shaft hole.

Optionally, the second flow channel hole is arranged at a second preset angle with respect to the center line of the rotating shaft, and the third flow channel hole is arranged at a third preset angle with respect to the center line of the rotating shaft; the inner wall of the mounting hole is sunken to form a second groove, and the second groove is blocked by the outer wall of the inner bushing to form a second oil passage; the second flow passage hole is communicated with the third flow passage hole through the second oil passing passage.

Optionally, the rotating shaft is further provided with a first branch flow passage hole and at least one second branch flow passage hole both communicated with the shaft hole, and the housing is further provided with a communication hole communicated with the second branch flow passage hole; the second oil passage conveys high-pressure oil to the second oil passage object through the first branch flow passage hole; the second oil passage also delivers high-pressure oil to a fourth oil passage object through the second branch flow passage hole and the communication hole in sequence.

Optionally, the transmission integrated independent oil passage structure further comprises an outer bushing hermetically mounted on an outer wall of the housing; and the outer bushing is provided with a through hole communicated with the third flow passage hole, and the first oil passage is communicated with the first oil passage object through the through hole.

Optionally, the transmission integrated independent oil passage structure further includes a static seal ring sealingly installed between the inner liner and the casing.

Optionally, the transmission integrated independent oil path structure further includes a dynamic seal ring hermetically installed between the rotating shaft and the inner bushing.

Optionally, the center line of the first flow channel hole, the center line of the second flow channel hole, and the center line of the third flow channel hole are located on the same plane or on a set of planes parallel to each other.

The utility model further provides a gearbox which comprises the transmission integrated independent oil circuit structure.

In the present invention, the second flow passage hole and the third flow passage hole form a first oil passage, that is, high-pressure oil may be delivered to the first oil passage object through the first oil passage, and the high-pressure oil of the first oil passage object may also flow back through the first oil passage; the first flow passage hole and the first shaft hole form a second oil passage, that is, high-pressure oil can be conveyed to a second oil passage object through the second oil passage, and the high-pressure oil of the second oil passage object can also flow back through the second oil passage. The transmission integrated independent oil way structure is provided with at least two independent oil ducts in a limited space (namely, the transmission integrated independent oil way structure at least comprises the first oil duct and the second oil duct), each independent oil duct has a larger flow area and can bear higher oil pressure, and the contradiction between the large flow area required by the oil ducts and the small installation space of the transmission integrated independent oil way structure is solved; meanwhile, when the first oil path object and the second oil path object are different independent clutches, the combination and the disengagement of the first oil path object and the second oil path object (namely two different independent clutches) can be controlled at least respectively by controlling the oil pressure of hydraulic oil in the first oil path and the second oil path, so that the rapid and timely replacement of the speed ratios of a plurality of clutches of the automobile is realized. In addition, the structure of the transmission integrated with the independent oil way is compact, occupies small space and is beneficial to the installation of the transmission integrated with the independent oil way on an automobile.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a partial structural schematic view of a transmission integrated independent oil passage structure according to a first embodiment of the present invention;

fig. 2 is a sectional view of a case of a transmission integrated independent oil passage structure according to a first embodiment of the utility model;

fig. 3 is a partial structural schematic view of a housing of the transmission integrated independent oil passage structure according to the first embodiment of the utility model;

fig. 4 is a sectional view of a rotating shaft of the transmission integrated independent oil passage structure according to the first embodiment of the present invention;

fig. 5 is a sectional view of an inner liner of the transmission integrated independent oil passage structure according to the first embodiment of the utility model;

fig. 6 is a sectional view of an outer liner of the transmission integrated independent oil passage structure according to the first embodiment of the present invention;

fig. 7 is a partial structural schematic view of a transmission integrated independent oil passage structure according to a second embodiment of the present invention;

fig. 8 is a partial structural schematic view of a case of a transmission integrated independent oil passage structure according to a second embodiment of the utility model;

fig. 9 is a partial structural schematic view of a rotating shaft of a transmission integrated independent oil passage structure according to a second embodiment of the present invention;

fig. 10 is a sectional view of a case of a transmission integrated independent oil passage structure according to a second embodiment of the utility model;

fig. 11 is a partial structural schematic diagram of a housing of the transmission integrated independent oil passage structure according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. an inner liner; 2. a rotating shaft; 21. a first shaft hole; 22. a second shaft hole; 23. a second branch flow passage hole; 3. a housing; 31. a first flow channel hole; 32. a second flow channel hole; 33. a third flow passage hole; 34. a fourth flow passage hole; 35. a first groove; 36. a second groove; 37. a communicating hole; 38. mounting holes; 4. an outer liner; 41. a through hole; 5. a static seal ring; 6. a dynamic seal ring; 7. a plug; 101. a first oil passage; 102. a second oil passage; 103. the third oil passage.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 to 3, an integrated independent oil path structure of a transmission according to an embodiment of the present invention includes an inner bushing 1, a rotating shaft 2 having a first shaft hole 21, and a housing 3 having a mounting hole 38; the inner bushing 1 is arranged in the mounting hole 38, and the rotating shaft 2 is rotatably arranged in the inner bushing 1; a first flow channel hole 31, a second flow channel hole 32 and a third flow channel hole 33 communicated with the second flow channel hole 32 are formed in the housing 3; it can be understood that the inner bushing 1 is interference-mounted in the mounting hole 38, and the rotating shaft 2 is rotatably mounted in the inner bushing 1, so as to ensure that the relative rotation between the rotating shaft 2 and the inner bushing 1 can occur.

The second flow passage hole 32 and the third flow passage hole 33 constitute a first oil passage 101; the first flow passage hole 31 and the first shaft hole 21 constitute a second oil passage 102. It is understood that the high-pressure oil may be delivered to the first oil passage object through the first oil passage 101, and the high-pressure oil of the first oil passage object may also flow back through the first oil passage 101; high-pressure oil can be conveyed to a second oil way object through the second oil passage 102, and the high-pressure oil of the second oil way object can also flow back through the second oil passage 102; specifically, in a specific embodiment, high-pressure oil may flow to the first clutch through the first oil passage 101, thereby controlling engagement and disengagement of the first clutch; a shaft through hole communicating with the first shaft hole 21 can be designed on the rotating shaft 2 according to actual requirements, so that high-pressure oil can flow to and lubricate parts such as gears, bearings and the like mounted on the rotating shaft 2 through the shaft through hole through the second oil passage 102. Understandably, the first oil way object and the second oil way object comprise one or more of a control clutch, a gear, a bearing and the like but are not limited to; that is, the high-pressure oil output from both of the oil passages (the first oil passage 101 and the second oil passage 102) may control the engagement and disengagement of the corresponding clutch, or may lubricate the corresponding clutch, gear, and bearing, etc.

In the present invention, the second flow passage hole 32 and the third flow passage hole 33 form a first oil passage 101, that is, high-pressure oil may be delivered to a first oil passage object through the first oil passage 101, and the high-pressure oil of the first oil passage object may also flow back through the first oil passage 101 (that is, the high-pressure oil may flow in both directions in the first oil passage 101); the first flow passage hole 31 and the shaft hole form a second oil passage 102, that is, high-pressure oil may be delivered to a second oil passage object through the second oil passage 102, and the high-pressure oil of the second oil passage object may also flow back through the second oil passage 102 (that is, the high-pressure oil may flow in both directions in the second oil passage 102). The speed changer integrated independent oil way structure is provided with at least two independent oil ducts in a limited space (namely, the speed changer integrated independent oil way structure at least comprises the first oil duct 101 and the second oil duct 102), each independent oil duct has a larger flow area and can bear higher oil pressure, and the contradiction between the large flow area required by the oil ducts and the small installation space of the speed changer integrated independent oil way structure is solved; meanwhile, when the first oil path object and the second oil path object are different independent clutches, the combination and the disengagement of 2 independent clutches can be controlled at least respectively by controlling the oil pressure of hydraulic oil in the two independent oil paths, and the timely quick replacement of the speed ratios of the plurality of clutches of the automobile is realized. In addition, the structure of the transmission integrated with the independent oil way is compact, occupies small space and is beneficial to the installation of the transmission integrated with the independent oil way on an automobile.

In an embodiment, as shown in fig. 7 to 9, a fourth flow passage hole 34 is further formed in the housing 3, a second shaft hole 22 communicated with the fourth flow passage hole 34 is formed in the rotating shaft 2, and a center line of the first shaft hole 21 is parallel to a center line of the second shaft hole 22; it is understood that the first shaft hole 21 and the second shaft hole 22 are both disposed on the rotating shaft 2, but the first shaft hole 21 and the second shaft hole 22 are not in conduction.

The fourth flow passage hole 34 and the second shaft hole 22 constitute a third oil passage 103. It is to be understood that high-pressure oil may be delivered to the third oil passage object through the third oil passage 102, and that high-pressure oil of the third oil passage object may also flow back through the third oil passage 103 (i.e., high-pressure oil may flow in both directions in the third oil passage 103). In a specific embodiment, the third oil passage object includes a third clutch, so that the high pressure oil can control the engagement and disengagement of the second clutch mounted on the rotating shaft 2 through the third oil passage 103. It is understood that the third oil path object includes, but is not limited to, one or more of a control clutch, a gear, a bearing, and the like; that is, the high-pressure oil output from each of the three oil passages (the first oil passage 101, the second oil passage 102, and the third oil passage 103) in the present embodiment may control the engagement and disengagement of the corresponding clutch, or may lubricate the corresponding clutch, gear, and bearing, and the like. In this embodiment, the transmission integrated independent oil path structure is provided with three independent oil paths (i.e., the first oil path 101, the second oil path 102, and the third oil path 103) in a limited space, and each of the three independent oil paths has a large flow area and can bear high oil pressure, so that the contradiction between the large flow area required by the oil paths and the small installation space of the transmission integrated independent oil path structure is solved; meanwhile, when the first oil path object, the second oil path object and the third oil path object are three independent clutches, the combination and the disengagement of the three independent clutches can be controlled at least respectively by controlling the oil pressure of hydraulic oil in the three independent oil paths, and the rapid and timely replacement of the speed ratios of the plurality of clutches of the automobile is realized.

In one embodiment, as shown in fig. 7, the fourth flow channel hole 34 is disposed at a first predetermined angle with respect to the center line of the rotating shaft 2; a first groove 35 is formed by recessing the inner wall of the mounting hole 38, and the first groove 35 is blocked by the outer wall of the inner bushing 1 to form a first oil passage; the first flow passage hole 31 communicates with the second shaft hole 22 through the first oil gallery. It is understood that the first preset angle may be set according to actual requirements, that is, the fourth flow channel hole 34 may be set to be relatively inclined with respect to the center line of the rotating shaft 2 according to the structures of the housing 3, the rotating shaft 2 and the inner liner 1, and the relative positional relationship among the three (that is, the fourth flow channel hole 34 is an inclined hole); in this way, the fourth flow passage hole 34 is not limited by the structure of the housing 3 and the outer liner 4, and may be provided at any position convenient for installation.

Furthermore, the fourth flow passage hole 34 and the center line of the rotating shaft 2 are arranged at a second preset angle, so that in order to avoid that high-pressure oil flowing into the fourth flow passage hole 34 enters the second shaft hole 22 and is bent at the inclined intersection of the fourth flow passage hole 34 and the second shaft hole 22, the energy of the high-pressure oil in the fourth flow passage is lost, the second oil passage is arranged, the transition area between the fourth flow passage hole 34 and the second shaft hole 22 is increased, the flow resistance of the high-pressure oil in the third oil passage 103 is reduced, and the high-pressure performance of the high-pressure oil in the third oil passage 103 is ensured.

In one embodiment, as shown in fig. 7, the first shaft hole 21 and the second shaft hole 22 are communicated; the speed changer integrated independent oil path structure further comprises a plug 7 which is installed in the second shaft hole 22 and used for separating the second shaft hole 22 from the first shaft hole 21. It can be understood that the plug 7 includes, but is not limited to, a steel ball, a plug, and other components; further, in order to process the first shaft hole 21 and the second shaft hole 22 on the rotating shaft 2 after one-time clamping (that is, process the first shaft hole 21 and the second shaft hole 22 from the right end to the left end in fig. 7), the first shaft hole 21 and the second shaft hole 22 are designed to be communicated, and the second shaft hole 22 and the first shaft hole 21 are separated by using the plug 7, so that the manufacturing cost of the rotating shaft 2 is reduced.

In an embodiment, as shown in fig. 1, 2, 7 and 10, the second flow channel hole 32 is disposed at a second predetermined angle with respect to the center line of the rotating shaft 2, and the third flow channel hole 33 is disposed at a third predetermined angle with respect to the center line of the rotating shaft 2; the inner wall of the mounting hole 38 is recessed to form a second groove 36, and the second groove 36 is blocked by the outer wall of the inner liner 1 to form a second oil passage; the second flow passage hole 32 communicates with the third flow passage hole 33 through the second oil passage. It can be understood that both the second preset angle and the third preset angle can be set according to actual requirements; the second flow channel hole 32 and the third flow channel hole 33 are bent, that is, the second flow channel hole 32 may be set to be inclined relative to the third flow channel hole 33 according to the structures of the housing 3, the shaft 2, and the inner hub 1, the relative positional relationship among the three, and the like; understandably, at the same time, the second flow passage hole 32 and/or the third flow passage hole 33 may also be disposed to be relatively inclined with respect to the center line of the rotating shaft 2 (that is, both the second flow passage hole 32 and the third flow passage hole 33 may be inclined holes), so that the disposition of the second flow passage hole 32 and the third flow passage hole 33 is not limited by the structure of the housing 3 and the outer bushing 4, and may be disposed at any convenient mounting position; preferably, the center line of the outlet of the second flow passage hole 32 is perpendicular to the center line of the rotating shaft 2; at this time, when the first oil passage is targeted for the first clutch mounted on the housing 3 (the center axis of the first clutch coincides with the center axis of the rotating shaft 2), the high-pressure oil in the first oil passage 101 can flow vertically into the first clutch, so that the engagement and disengagement of the first clutch can be controlled more effectively. And the first groove 35 is sealed by the inner liner 1 so that the high-pressure oil in the first oil passage 101 does not leak into the inner bore of the inner liner 1.

Further, the second flow channel hole 32 and the center line of the rotating shaft 2 are arranged at a second preset angle, and the third flow channel hole 33 and the center line of the rotating shaft 2 are arranged at a third preset angle; thereby facilitating the machining of the second flow channel hole 32 and the third flow channel hole 33; and a bent structure is formed between the second flow passage hole 32 and the third flow passage hole 33, so that when high-pressure oil flowing into the second flow passage hole 32 enters the third flow passage hole 33, the high-pressure oil can collide at a corner position where the second flow passage hole 32 and the third flow passage hole 33 are obliquely intersected, and the energy of high-pressure oil in the second flow passage hole 32 is lost, so that the second oil passage is arranged, the transition area between the second flow passage hole 32 and the third flow passage hole 33 is increased, the flow resistance of the high-pressure oil in the first oil passage 101 is reduced, and the high-pressure performance of the high-pressure oil in the first oil passage 101 is ensured.

In one embodiment, as shown in fig. 1 and 4, the center line of the first shaft hole 21 coincides with the center line of the rotating shaft 2. It can be understood that the second oil passage 102 is arranged at the center line of the rotating shaft 2, so that the rotating speed of the high-pressure oil in the second oil passage 102 can be reduced, and the stability of the high-pressure oil in the second oil passage 102 can be improved.

Further, as shown in fig. 11, the first groove 35 and the second groove 36 are disposed on the mounting hole 38, that is, the inner side wall of the housing is provided with the grooves to replace the conventional round hole oil passage, so that the space of the mounting hole 38 of the housing can be reasonably used, and the problem of insufficient wall thickness of the housing due to the excessive space of the grooves is avoided.

Further, as shown in fig. 1 and 4, the rotating shaft 2 is further provided with a first branch flow passage hole (not shown) and at least one second branch flow passage hole 23 both communicating with the first shaft hole 21, and the housing 3 is further provided with a communication hole 37 communicating with the second branch flow passage hole 23; the second oil passage 102 delivers high-pressure oil to the second oil passage object through the first branch flow passage hole; the second oil passage 102 also delivers high-pressure oil to a fourth oil passage object through the second branch flow passage hole 23 and the communication hole 37 in this order. It can be understood that the fourth oil path objects may be a clutch, a bearing, a gear, and the like, the number of the second branch flow passages may be determined according to actual requirements, and the high-pressure oil of each second branch flow passage may lubricate one bearing or one gear; wherein the high pressure oil in the second branch flow passage hole 23 may control engagement and disengagement of the clutch, or lubricate the clutch, gears, bearings, etc. In a specific embodiment, the first oil passage 101 is used for controlling engagement and disengagement of a first clutch mounted on an outer wall of the housing 3, and the high-pressure oil lubrication in the second branch flow passage hole 23 may control a second clutch mounted on an outer wall of the casing; the first branch flow channel extends along the central line of the rotating shaft 2, and the high-pressure oil in the first branch flow channel can be used for lubricating and installing rotating parts such as gears, bearings and the like on the rotating shaft 2. In the present invention, the first branch flow passage hole and the second branch flow passage hole 23 are provided, so that the integration level of the transmission integrated independent oil path structure is further improved.

In one embodiment, as shown in fig. 1, 6 and 7, the transmission integrated independent oil passage structure further includes an outer liner 4 sealingly mounted on an outer wall of the housing 3; the outer liner 4 is provided with a through hole 41 communicating with the third flow passage hole 33, and the first oil passage 101 communicates with the first oil passage object through the through hole 41. As can be understood, the outer liner 4 is connected to the housing 3 in an interference manner, so that the outer liner can seal the third flow passage hole 33 on the housing 3, and the high-pressure oil in the first oil passage 101 is ensured not to leak.

Preferably, the outer liner 4 is a rigid member, the outer liner 4 of the rigid member can bear increased pressure, and the required wall thickness of the outer liner 4 is small, so that the processing is convenient. Further, the center line of the through hole 41 is perpendicular to the center line of the outer liner 4, and the center line of the outer liner 4 coincides with the central axis of the rotating shaft 2, so that the center line of the through hole 41 is perpendicular to the center line of the rotating shaft 2, so that the high-pressure oil in the first oil passage 101 can flow vertically from the through hole 41 into the first clutch mounted on the outer wall of the outer liner 4 after flowing out from the third flow passage hole 33, whereby the engagement and disengagement of the first clutch can be controlled better.

In an embodiment, as shown in fig. 1, 5 and 7, the transmission integrated independent oil passage structure further includes a static seal ring 5 sealingly installed between the inner liner 1 and the housing 3; as will be appreciated, since the inner liner 1 is interference-mounted in the mounting hole 38 of the housing 3, the static seal ring 5 may function to seal the inner liner 1 and the mounting hole 38, thereby ensuring that the high-pressure oil in the first oil passage 101, the second oil passage 102 and the third oil passage 103 does not leak out from the gap between the inner liner 1 and the inner wall of the mounting hole 38. Further, the static sealing ring 5 can be an O-shaped sealing ring, a sealant, etc.; specifically, when the requirement on the sealing pressure of the inner bushing 1 and the rotating shaft 2 is low, the static sealing ring 5 is an O-shaped sealing ring, and sealing is realized through interference fit of the O-shaped sealing ring; when the static sealing ring 5 is an O-shaped sealing ring; the sealing between the inner bushing 1 and the mounting hole 38 of the shell 3 is realized by the O-shaped sealing ring sleeved on the inner bushing 1, and a sealing groove for mounting a sealing element is not required to be formed in the inner wall of the mounting hole 38, so that the problem that the cylindricity of the shell 3 is irregular due to the fact that the shell 3 is provided with the sealing groove is solved. Further, when the requirement on the cleanliness of the gearbox is low, the static sealing ring 5 is sealant, and the lining 1 and the shell 3 can be connected in a sealing mode through the sealant.

In an embodiment, as shown in fig. 7, the transmission integrated independent oil path structure further includes a dynamic seal ring 6 sealingly installed between the rotating shaft 2 and the inner liner 1. It can be understood that, since the rotating shaft 2 is rotatably installed in the inner bushing 1, the dynamic seal ring 6 should be fitted with the inner bushing 1 and the rotating shaft 2 according to the tolerance required by the dynamic seal ring 6, so that the dynamic seal ring 6 can achieve the technical effect of sealing the casing 3 in the third oil passage 103 and the second shaft hole 22, and prevent the high-pressure oil in the third oil passage 103 from leaking from the communication position corresponding to the connection position of the fourth passage hole 34 and the second shaft hole 22 (i.e., the communication position between the casing 3 and the rotating shaft 2).

In one embodiment, as shown in fig. 2 and 10, the center line of the first flow channel hole 31, the center line of the second flow channel hole 32, and the center line of the third flow channel hole 33 are located on the same plane or a set of planes parallel to each other. Further, the center line of the first flow channel hole 31, the center line of the second flow channel hole 32, the center line of the third flow channel hole 33, and the center line of the fourth flow channel hole 34 are located on the same plane or a set of planes parallel to each other. Preferably, the first flow channel hole 31, the second flow channel hole 32, the third flow channel hole 33 and the fourth flow channel hole 34 may be all designed as oblique holes, but the center lines of the four flow channel holes are located on the same plane, so that the four flow channel holes can be simultaneously machined and finished under the clamping of one set of clamps, thereby reducing the manufacturing cost of the transmission integrated independent oil path structure. And the first flow passage hole 31, the second flow passage hole 32 and the fourth flow passage hole 34 are all designed as inclined holes, so that three independent oil passages can be processed in the limited space of the transmission integrated independent oil passage structure, and the compactness of the transmission integrated independent oil passage structure is improved.

Further, the center line of the first flow channel hole 31, the center line of the second flow channel hole 32, the center line of the third flow channel hole 33, and the center line of the fourth flow channel hole 34 may be located on different four planes, but the four planes are a set of parallel planes; the design can also ensure that the four flow passage holes can be simultaneously processed under the clamping of one set of clamp, thereby reducing the manufacturing cost of the integrated independent oil passage structure of the transmission.

In the present invention, the housing 3 includes a first housing and a second housing connected to the first housing, the wall thickness of the first housing is smaller than that of the second housing, the first shell and the second shell are both provided with the mounting holes 38, the inner liner 1 comprises a first inner liner and a second inner liner connected with the first inner liner, the outer diameter of the first inner bushing is smaller than the outer diameter of the second inner bushing, which is clearance-fitted with the mounting hole 38 of the first housing, although a small amount of high-pressure oil leaks from the gap between the second inner liner and the mounting hole 38 (leakage of high-pressure oil from one or more of the first oil passage 101, the second oil passage 102, and the third oil passage 103), but the clearance fit can also prevent the first shell from generating an accident of damaging the second inner bushing due to interference expansion; the first inner bushing is in interference fit with the mounting hole 38 of the second shell, and the second shell is not easy to expand due to the large wall thickness of the second shell; and the interference fit between the first inner bushing and the mounting hole 38 can avoid the accident of leakage of the high-pressure oil in the first shaft hole 21 and/or the second shaft hole 22.

Further, the inner bush 1 is clearance-fitted with the rotation shaft 2 so that the rotation shaft 2 can rotate in the inner bush 1.

The utility model further provides a gearbox, which comprises the transmission integrated independent oil circuit structure.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An integrated independent oil circuit structure of a transmission is characterized by comprising an inner bushing, a rotating shaft provided with a first shaft hole and a shell with a mounting hole; the inner bushing is arranged in the mounting hole, and the rotating shaft is rotatably arranged in the inner bushing; the shell is provided with a first flow passage hole, a second flow passage hole and a third flow passage hole communicated with the second flow passage hole;

the second flow passage hole and the third flow passage hole form a first oil passage; the first flow passage hole and the first shaft hole constitute a second oil passage.

2. The integrated independent oil path structure of the transmission according to claim 1, wherein a fourth flow passage hole is further formed in the housing, a second shaft hole communicated with the fourth flow passage hole is formed in the rotating shaft, and a center line of the first shaft hole is arranged in parallel with a center line of the second shaft hole;

the fourth flow passage hole and the second shaft hole constitute a third oil passage.

3. The transmission integrated independent oil path structure according to claim 2, wherein the fourth flow passage hole is disposed at a first preset angle from a center line of the rotating shaft; the inner wall of the mounting hole is sunken to form a first groove, and the first groove is blocked by the outer wall of the inner bushing to form a first oil passage; the first flow passage hole is communicated with the second shaft hole through the first oil passing passage.

4. The transmission integrated independent oil passage structure according to claim 2, wherein the first shaft hole and the second shaft hole communicate; the transmission integrated independent oil way structure further comprises a plug which is installed in the second shaft hole and used for separating the second shaft hole from the first shaft hole.

5. The integrated independent oil path structure of the transmission according to claim 1, wherein the second flow passage hole is disposed at a second predetermined angle with respect to the center line of the rotating shaft, and the third flow passage hole is disposed at a third predetermined angle with respect to the center line of the rotating shaft; a second groove is formed in the inner wall of the mounting hole in a recessed mode, and the second groove is blocked by the outer wall of the inner bushing to form a second oil passage; the second flow passage hole is communicated with the third flow passage hole through the second oil passing passage.

6. The transmission integrated independent oil passage structure according to claim 1, wherein the rotating shaft is further provided with a first branch flow passage hole and at least one second branch flow passage hole both communicating with the first shaft hole, and the housing is further provided with a communication hole communicating with the second branch flow passage hole; the second oil passage conveys high-pressure oil to a second oil passage object through the first branch flow passage hole; the second oil passage also delivers high-pressure oil to a fourth oil passage object through the second branch flow passage hole and the communication hole in sequence.

7. The transmission integrated stand-alone oil passage structure according to claim 1, further comprising an outer liner sealingly mounted on an outer wall of the housing; and the outer bushing is provided with a through hole communicated with the third flow passage hole, and the first oil passage is communicated with a first oil passage object through the through hole.

8. The transmission integrated stand-alone oil passage structure according to claim 1, further comprising a static seal ring sealingly mounted between the inner liner and the case; and/or

The transmission integrated independent oil circuit structure further comprises a dynamic sealing ring which is hermetically arranged between the rotating shaft and the inner lining.

9. The transmission integrated separate oil passage structure according to claim 1, wherein a center line of the first flow passage hole, a center line of the second flow passage hole, and a center line of the third flow passage hole are located on the same plane or on a set of planes parallel to each other.

10. A transmission characterized by comprising the transmission integrated independent oil passage structure according to any one of claims 1 to 9.

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