The transmission integrates an independent oil circuit structure and gearbox.

Abstract

This invention belongs to the field of automotive transmission technology, and specifically relates to a transmission integrated independent oil circuit structure and a gearbox. The transmission integrated independent oil circuit structure includes an inner bushing, a rotating shaft with a first shaft hole, and a housing with a mounting hole. The inner bushing is installed in the mounting hole, and the rotating shaft is rotatably installed in the inner bushing. The housing has a first flow channel hole, a second flow channel hole, and a third flow channel hole communicating with the second flow channel hole. The second flow channel hole and the third flow channel hole constitute a first oil passage; the first flow channel hole and the first shaft hole constitute a second oil passage. In this invention, the transmission integrated independent oil circuit structure provides two independent oil passages within a limited space. Both independent oil passages can have a large flow area and can withstand high oil pressure, thus resolving the contradiction between oil passage performance and limited installation space.

Description

Technical Field

[0001] This invention belongs to the field of automotive transmission technology, and in particular relates to a transmission integrated independent oil circuit structure and gearbox. Background Technology

[0002] The shifting mechanism of an automotive automatic transmission is largely controlled by clutches. In transmissions with multiple clutches, each clutch requires a separate oil circuit to control its engagement and disengagement. Clutch engagement typically requires high oil pressure, and clutch disengagement also has time requirements. This necessitates that the clutch oil circuit withstand high oil pressure and has a certain flow area. Consequently, the orifices in the clutch oil passages need to be relatively large, requiring significant space. However, most clutches are currently mounted on the same shaft, which also houses gears, bearings, and other components. Due to the rotational motion of gears and clutches, the oil passages are only suitable for placement at the shaft's center or other non-rotating or slow-rotating locations. These locations are further constrained by the rotating bearings, gears, and other components, leaving limited installation space. This makes it difficult to resolve the conflict between the flow area of ​​the oil passages and the available installation space. Summary of the Invention

[0003] This invention solves the technical problem of the contradiction between the installation space of various components on the transmission and the flow area of ​​the oil passage in the prior art, and provides a transmission with an integrated independent oil circuit structure and a gearbox.

[0004] In view of the above problems, the present invention provides a transmission integrated independent oil circuit structure, including an inner bushing, a rotating shaft with a first shaft hole, and a housing with a mounting hole; the inner bushing is installed in the mounting hole, and the rotating shaft is rotatably installed in the inner bushing; the housing is provided with a first flow channel hole, a second flow channel hole, and a third flow channel hole communicating with the second flow channel hole;

[0005] The second flow channel hole and the third flow channel hole constitute the first oil passage; the first flow channel hole and the first shaft hole constitute the second oil passage.

[0006] Optionally, the housing is further provided with a fourth flow channel hole, and the rotating shaft is provided with a second shaft hole communicating with the fourth flow channel hole, wherein the center line of the first shaft hole is arranged parallel to the center line of the second shaft hole;

[0007] The fourth flow channel hole and the second shaft hole constitute the third oil passage.

[0008] Optionally, the fourth flow channel hole is set at a first preset angle with the center line of the rotating shaft; a first groove is formed by a recess on the inner wall of the mounting hole, and the first groove is blocked by the outer wall of the inner bushing to form a first oil passage; the fourth flow channel hole is connected to the second shaft hole through the first oil passage.

[0009] Optionally, the first shaft hole and the second shaft hole are connected; the transmission integrated independent oil circuit structure also includes a plug installed in the second shaft hole and used to separate the second shaft hole and the first shaft hole.

[0010] Optionally, the second flow channel hole is set at a second preset angle to the center line of the rotating shaft, and the third flow channel hole is set at a third preset angle to the center line of the rotating shaft; a second groove is formed by a recess on the inner wall of the mounting hole, and the second groove is blocked by the outer wall of the inner bushing to form a second oil passage; the second flow channel hole is connected to the third flow channel hole through the second oil passage.

[0011] Optionally, the rotating shaft is further provided with a first branch flow channel hole and at least one second branch flow channel hole, both of which are connected to the shaft hole, and the housing is further provided with a connecting hole connected to the second branch flow channel hole; the second oil passage delivers high-pressure oil to the second oil circuit object through the first branch flow channel hole; the second oil passage also delivers high-pressure oil to the fourth oil circuit object sequentially through the second branch flow channel hole and the connecting hole.

[0012] Optionally, the integrated independent oil circuit structure of the transmission further includes an outer bushing that is sealed and installed on the outer wall of the housing; the outer bushing is provided with a through hole that connects to the third flow channel hole, and the first oil passage connects to the first oil circuit object through the through hole.

[0013] Optionally, the transmission integrated independent oil circuit structure also includes a static sealing ring installed between the inner bushing and the housing.

[0014] Optionally, the integrated independent oil circuit structure of the transmission also includes a dynamic sealing ring that is installed between the shaft and the inner bushing.

[0015] Optionally, the center lines of the first flow channel hole, the second flow channel hole, and the third flow channel hole are located on the same plane or on a set of mutually parallel planes.

[0016] Another embodiment of the present invention provides a transmission including the above-described transmission integrated independent oil circuit structure.

[0017] In this invention, the second flow channel hole and the third flow channel hole constitute the first oil passage, meaning that high-pressure oil can be transported to the first oil circuit object through the first oil passage, and the high-pressure oil of the first oil circuit object can also flow back through the first oil passage; the first flow channel hole and the first shaft hole constitute the second oil passage, meaning that high-pressure oil can be transported to the second oil circuit object through the second oil passage, and the high-pressure oil of the second oil circuit object can also flow back through the second oil passage. This integrated independent oil circuit structure for the transmission, within a limited space, provides two independent oil passages (i.e., the first oil passage and the second oil passage). Both independent oil passages can have a large flow area and withstand high oil pressure, resolving the contradiction between the large flow area required for the oil passages and the small installation space of the integrated independent oil circuit structure for the transmission. Simultaneously, when the first oil circuit object and the second oil circuit object are two independent clutches, by controlling the oil pressure in the two independent oil passages, the engagement and disengagement of at least two independent clutches can be controlled separately, enabling timely and rapid changes in the speed ratios of multiple clutches in the vehicle. Furthermore, this integrated independent oil circuit structure for the transmission is compact, occupies little space, and is conducive to its installation in a vehicle. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a partial structural diagram of the integrated independent oil circuit structure of the transmission provided in the first embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the housing of the transmission integrated independent oil circuit structure provided in the first embodiment of the present invention;

[0021] Figure 3 A partial structural schematic diagram of the housing of the transmission integrated independent oil circuit structure provided in the first embodiment of the present invention;

[0022] Figure 4 A cross-sectional view of the shaft of the transmission with integrated independent oil circuit structure provided in the first embodiment of the present invention;

[0023] Figure 5 A cross-sectional view of the inner bushing of the transmission integrated independent oil circuit structure provided in the first embodiment of the present invention;

[0024] Figure 6 A cross-sectional view of the outer bushing of the integrated independent oil circuit structure of the transmission provided in the first embodiment of the present invention;

[0025] Figure 7 This is a partial structural diagram of the integrated independent oil circuit structure of the transmission provided in the second embodiment of the present invention;

[0026] Figure 8A partial structural schematic diagram of the housing of the transmission integrated independent oil circuit structure provided in the second embodiment of the present invention;

[0027] Figure 9 A partial structural schematic diagram of the shaft of the transmission with integrated independent oil circuit structure provided in the second embodiment of the present invention;

[0028] Figure 10 This is a cross-sectional view of the housing of the transmission integrated independent oil circuit structure provided in the second embodiment of the present invention;

[0029] Figure 11 This is a partial structural diagram of the housing of a transmission with an integrated independent oil circuit structure provided in an embodiment of the present invention.

[0030] The reference numerals in the accompanying drawings are as follows:

[0031] 1. Inner bushing; 2. Shaft; 21. First shaft hole; 22. Second shaft hole; 23. Second branch flow channel hole; 3. Housing; 31. First flow channel hole; 32. Second flow channel hole; 33. Third flow channel hole; 34. Fourth flow channel hole; 35. First groove; 36. Second groove; 37. Connecting hole; 38. Mounting hole; 4. Outer bushing; 41. Through hole; 5. Static sealing ring; 6. Dynamic sealing ring; 7. Plug; 101. First oil passage; 102. Second oil passage; 103. Third oil passage. Detailed Implementation

[0032] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0033] It should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the present invention.

[0034] like Figures 1 to 3As shown, an embodiment of the present invention provides a transmission integrated independent oil circuit structure, including an inner bushing 1, a rotating shaft 2 with a first shaft hole 21, and a housing 3 with a mounting hole 38; the inner bushing 1 is installed in the mounting hole 38, and the rotating shaft 2 is rotatably installed in the inner bushing 1; the housing 3 is provided with a first flow channel hole 31, a second flow channel hole 32, and a third flow channel hole 33 communicating with the second flow channel hole 32; it can be understood that the inner bushing 1 is interference-fitted in the mounting hole 38, and the rotating shaft 2 is rotatably installed in the inner bushing 1, thereby ensuring that relative rotation can occur between the rotating shaft 2 and the inner bushing 1.

[0035] The second flow channel hole 32 and the third flow channel hole 33 constitute the first oil passage 101; the first flow channel hole 31 and the first shaft hole 21 constitute the second oil passage 102. Understandably, high-pressure oil can be delivered to the first oil circuit object through the first oil passage 101, and high-pressure oil in the first oil circuit object can also flow back through the first oil passage 101; high-pressure oil can be delivered to the second oil circuit object through the second oil passage 102, and high-pressure oil in the second oil circuit object can also flow back through the second oil passage 102. Specifically, in a specific embodiment, high-pressure oil can flow to the first clutch through the first oil passage 101, thereby controlling the engagement and disengagement of the first clutch; the rotating shaft 2 can be designed with a shaft through-hole connecting to the first shaft hole 21 according to actual needs, so that high-pressure oil can flow through the second oil passage 102 through the shaft through-hole to gears, bearings, and other parts mounted on the rotating shaft 2 and lubricate them. Understandably, the first oil circuit object and the second oil circuit object include, but are not limited to, one or more of the following: control of clutches, gears, and bearings; that is, the high-pressure oil output from the two oil circuits (first oil passage 101 and second oil passage 102) can control the engagement and disengagement of their corresponding clutches, or can lubricate their corresponding clutches, gears, and bearings.

[0036] In this invention, the second flow channel hole 32 and the third flow channel hole 33 constitute the first oil passage 101, that is, high-pressure oil can be transported to the first oil circuit object through the first oil passage 101, and the high-pressure oil of the first oil circuit object can also flow back through the first oil passage 101 (that is, high-pressure oil can flow bidirectionally in the first oil passage 101); the first flow channel hole 31 and the shaft hole constitute the second oil passage 102, that is, high-pressure oil can be transported to the second oil circuit object through the second oil passage 102, and the high-pressure oil of the second oil circuit object can also flow back through the second oil passage 102 (that is, high-pressure oil can flow bidirectionally in the second oil passage 102). This transmission's integrated independent hydraulic circuit structure, within a limited space, features two independent oil passages (i.e., the first oil passage 101 and the second oil passage 102). Both independent oil passages have a large flow area and can withstand high oil pressure, resolving the contradiction between the large flow area required for the oil passages and the limited installation space of the integrated independent hydraulic circuit structure. Furthermore, when the first and second oil passages are used for two independent clutches, by controlling the hydraulic pressure within the two independent oil passages, the engagement and disengagement of at least two independent clutches can be controlled separately, enabling timely and rapid changes in the speed ratios of multiple clutches in the vehicle. In addition, this integrated independent hydraulic circuit structure is compact, occupies little space, and is conducive to its installation in automobiles.

[0037] In one embodiment, such as Figures 7 to 9 As shown, the housing 3 is also provided with a fourth flow channel hole 34, and the rotating shaft 2 is provided with a second shaft hole 22 that communicates with the fourth flow channel hole 34. The center line of the first shaft hole 21 is arranged parallel to the center line of the second shaft hole 22. It can be understood that the first shaft hole 21 and the second shaft hole 22 are not connected on the rotating shaft 2.

[0038] The fourth flow channel hole 34 and the second shaft hole 22 constitute the third oil passage 103. Understandably, high-pressure oil can be delivered to the third oil circuit object through the third oil passage 102, and high-pressure oil in the third oil circuit object can also flow back through the third oil passage 103 (i.e., high-pressure oil can flow bidirectionally in the third oil passage 103). In a specific embodiment, the third oil circuit object is a second clutch, so that 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. Understandably, the third oil circuit object includes, but is not limited to, controlling one or more of clutches, gears, and bearings; that is, the high-pressure oil output from the three oil passages (first oil passage 101, second oil passage 102, and third oil passage 103) in this embodiment can control the engagement and disengagement of their corresponding clutches, or can lubricate their corresponding clutches, gears, and bearings, etc. In this embodiment, the transmission integrated independent oil circuit structure has three independent oil passages (i.e., the first oil passage 101, the second oil passage 102, and the third oil passage 103) in a limited space. All three independent oil passages have a large flow area and can withstand high oil pressure, which solves the contradiction between the large flow area required for the oil passages and the small installation space of the transmission integrated independent oil circuit structure. At the same time, when the first oil circuit object, the second oil circuit object, and the third oil circuit object are three independent clutches, by controlling the oil pressure in the three independent oil passages, the engagement and disengagement of at least three independent clutches can be controlled respectively, realizing timely and rapid change of the speed ratio of multiple clutches in the vehicle.

[0039] In one embodiment, such as Figure 7 As shown, the fourth flow channel hole 34 is set at a first preset angle to the center line of the rotating shaft 2; a first groove 35 is formed by a recess on 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 fourth flow channel hole 34 is connected to the second shaft hole 22 through the first oil passage. It can be understood that the first preset angle can be set according to actual needs, that is, the fourth flow channel hole 34 can be set to be relatively inclined to the center line of the rotating shaft 2 according to the structure of the housing 3, the rotating shaft 2 and the inner bushing 1 and the relative positional relationship between the three (that is, the fourth flow channel hole 34 is an oblique hole); thus, the setting of the fourth flow channel hole 34 is not limited by the structure of the housing 3 and the outer bushing 4, and can be set in any convenient installation position.

[0040] Furthermore, the fourth flow channel hole 34 is set at a second preset angle with the center line of the rotating shaft 2. In order to prevent the high-pressure oil flowing into the fourth flow channel hole 34 from turning at the inclined intersection of the fourth flow channel hole 34 and the second shaft hole 22 when it enters the second shaft hole 22, thus causing energy loss of the high-pressure oil in the fourth flow channel, a second oil passage is set to increase the transition area between the fourth flow channel hole 34 and the second shaft hole 22, thereby reducing the flow resistance of the high-pressure oil in the third oil passage 103 and ensuring the high-pressure performance of the high-pressure oil in the third oil passage 103.

[0041] In one embodiment, such as Figure 7 As shown, the first shaft hole 21 and the second shaft hole 22 are connected; the integrated independent oil circuit structure of the transmission also includes a plug 7 installed in the second shaft hole 22 and used to separate the second shaft hole 22 and the first shaft hole 21. It can be understood that the plug 7 includes, but is not limited to, components such as steel balls and screw plugs; furthermore, in order to machine the first shaft hole 21 and the second shaft hole 22 on the rotating shaft 2 in one clamping operation (i.e., from... Figure 7 The first shaft hole 21 and the second shaft hole 22 are machined from the right end to the left end. The first shaft hole 21 and the second shaft hole 22 are designed to be connected. The plug 7 is used to separate the second shaft hole 22 and the first shaft hole 21, thereby reducing the manufacturing cost of the rotating shaft 2.

[0042] In one embodiment, such as Figure 1 , Figure 2 , Figure 7 as well as Figure 10As shown, the second flow channel hole 32 is set at a second preset angle to the center line of the rotating shaft 2, and the third flow channel hole 33 is set at a third preset angle to the center line of the rotating shaft 2; a second groove 36 is formed by a recess on the inner wall of the mounting hole 38, and the second groove 36 is blocked by the outer wall of the inner bushing 1 to form a second oil passage; the second flow channel hole 32 is connected to the third flow channel hole 33 through the second oil passage. It can be understood that the second preset angle and the third preset angle can be set according to actual needs; and the second flow channel hole 32 and the third flow channel hole 33 have a bent structure, that is, the second flow channel hole 32 can be set to be relatively inclined to the third flow channel hole 33 according to the structure of the housing 3, the rotating shaft 2 and the inner bushing 1 and the relative positional relationship between the three; it can also be understood that the second flow channel hole 32 and / or the third flow channel hole 33 can also be set to be relatively inclined to the center line of the rotating shaft 2 (that is, the second flow channel hole 32 and the third flow channel hole 33 can be Since both are oblique holes, the arrangement of the second flow channel hole 32 and the third flow channel hole 33 is not limited by the structure of the housing 3 and the outer bushing 4, and can be set in any convenient installation position. Preferably, the center line of the outlet of the second flow channel hole 32 is perpendicular to the center line of the rotating shaft 2. In this case, when the first oil circuit object is the first clutch installed 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, thereby better controlling the engagement and disengagement of the first clutch. The first groove 35 is sealed by the inner bushing 1, so that the high-pressure oil in the first oil passage 101 will not leak into the inner hole of the inner bushing 1.

[0043] Furthermore, the second flow channel hole 32 is set at a second preset angle to the center line of the rotating shaft 2, and the third flow channel hole 33 is set at a third preset angle to the center line of the rotating shaft 2; this facilitates the processing of the second flow channel hole 32 and the third flow channel hole 33. Since the second flow channel hole 32 and the third flow channel hole 33 have a bent structure, to prevent the high-pressure oil flowing into the second flow channel hole 32 from entering the third flow channel hole 33, the high-pressure oil will collide at the bend where the second flow channel hole 32 and the third flow channel hole 33 intersect, causing energy loss in the high-pressure oil within the second flow channel hole 32. Therefore, a second oil passage is provided to increase the transition area between the second flow channel hole 32 and the third flow channel hole 33, thereby reducing the flow resistance of the high-pressure oil in the first oil passage 101 and ensuring the high-pressure performance of the high-pressure oil in the first oil passage 101.

[0044] In one embodiment, such as Figure 1 and Figure 4As shown, the centerline of the first shaft hole 21 coincides with the centerline of the rotating shaft 2. It can be understood that arranging the second oil passage 102 at the centerline of the rotating shaft 2 reduces the rotational speed of the high-pressure oil within the second oil passage 102, thereby improving the stability of the high-pressure oil within the second oil passage 102.

[0045] Furthermore, such as Figure 11 As shown, the first groove 35 and the second groove 36 are provided on the mounting hole 38, that is, the groove is processed on the inner side wall of the housing to replace the traditional round hole oil passage, which can make reasonable use of the space of the mounting hole 38 of the housing, and the housing will not have insufficient wall thickness due to the excessive space of the groove.

[0046] Furthermore, such as Figure 1 and Figure 4 As shown, the rotating shaft 2 is also provided with a first branch flow channel hole (not shown) and at least one second branch flow channel hole 23, both of which are connected to the first shaft hole 21. The housing 3 is also provided with a connecting hole 37 connected to the second branch flow channel hole 23. The second oil passage 102 delivers high-pressure oil to the second oil circuit object through the first branch flow channel hole. The second oil passage 102 also delivers high-pressure oil to the fourth oil circuit object sequentially through the second branch flow channel hole 23 and the connecting hole 37. It can be understood that the fourth oil circuit object can be a clutch, bearing, gear, etc., and the number of second branch flow channels can be determined according to actual needs. The high-pressure oil in each second branch flow channel can lubricate a bearing or gear, etc. The high-pressure oil in the second branch flow channel hole 23 can control the engagement and disengagement of the clutch, or lubricate the clutch, gear, bearing, etc. In one specific embodiment, the first oil passage 101 is used to control the engagement and disengagement of the first clutch mounted on the outer wall of the housing 3, and the high-pressure oil lubrication in the second branch flow channel hole 23 can control the second clutch mounted on the outer wall of the housing; the first branch flow channel extends along the centerline of the rotating shaft 2, and the high-pressure oil in the first branch flow channel can be used to lubricate rotating components such as gears and bearings mounted on the rotating shaft 2. In this invention, the provision of the first branch flow channel hole and the second branch flow channel hole 23 further improves the integration of the independent oil circuit structure of the transmission.

[0047] In one embodiment, such as Figure 1 , Figure 6 as well as Figure 7As shown, the integrated independent oil circuit structure of the transmission also includes an outer bushing 4 sealed and installed on the outer wall of the housing 3; the outer bushing 4 is provided with a through hole 41 communicating with the third flow channel hole 33, and the first oil passage 101 is connected to the first oil circuit object through the through hole 41. It can be understood that the outer bushing 4 is interference-fitted to the housing 3, thereby sealing the third flow channel hole 33 on the housing 3 and ensuring that the high-pressure oil in the first oil passage 101 does not leak.

[0048] Preferably, the outer bushing 4 is a rigid component, which can withstand increased pressure. The outer bushing 4 requires a smaller wall thickness and is easy to process. Furthermore, the centerline of the through hole 41 is perpendicular to the centerline of the outer bushing 4, and the centerline of the outer bushing 4 coincides with the center axis of the rotating shaft 2. Therefore, the centerline of the through hole 41 is perpendicular to the centerline of the rotating shaft 2. As a result, the high-pressure oil in the first oil passage 101 can flow vertically from the through hole 41 into the first clutch installed on the outer wall of the outer bushing 4 after flowing out from the third flow channel hole 33, thereby better controlling the engagement and disengagement of the first clutch.

[0049] In one embodiment, such as Figure 1 , Figure 5 as well as Figure 7 As shown, the integrated independent oil circuit structure of the transmission also includes a static sealing ring 5 that is sealed between the inner bushing 1 and the housing 3. Understandably, since the inner bushing 1 is interference-fitted into the mounting hole 38 of the housing 3, the static sealing ring 5 can seal the inner bushing 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 will not leak out from the gap between the inner bushing 1 and the inner wall of the mounting hole 38. Furthermore, the static sealing ring 5 can be an O-ring, sealant, etc. Specifically, when the sealing pressure requirement between the inner bushing 1 and the rotating shaft 2 is low, the static sealing ring 5 is an O-ring, and the seal is achieved through the interference fit of the O-ring. When the static sealing ring 5 is an O-ring, the seal between the inner bushing 1 and the mounting hole 38 of the housing 3 is achieved by the O-ring fitted onto the inner bushing 1, eliminating the need to create a sealing groove on the inner wall of the mounting hole 38 for installing the seal, thus avoiding the problem of irregular cylindricity of the housing 3 due to the creation of a sealing groove. Furthermore, when the cleanliness requirement of the gearbox is low, the static sealing ring 5 is a sealant, and the sealing connection between the inner bushing 1 and the housing 3 can be achieved through the sealant.

[0050] In one embodiment, such as Figure 7As shown, the integrated independent oil circuit structure of the transmission also includes a dynamic sealing ring 6 sealed between the rotating shaft 2 and the inner bushing 1. Understandably, since the rotating shaft 2 is rotatably mounted inside the inner bushing 1, the dynamic sealing ring 6 should be fitted with the inner bushing 1 and the rotating shaft 2 according to the tolerances required by the dynamic sealing ring 6. Thus, the dynamic sealing ring 6 can effectively seal the housing 3 and the second shaft hole 22 in the third oil passage 103, preventing high-pressure oil in the third oil passage 103 from leaking out from the flow point corresponding to the connection position of the fourth flow channel hole 34 and the second shaft hole 22 (i.e., the connection point between the housing 3 and the rotating shaft 2).

[0051] In one embodiment, such as Figure 2 and Figure 10 As shown, the center lines of the first flow channel hole 31, the second flow channel hole 32, and the third flow channel hole 33 are located on the same plane or a set of parallel planes. Further, the center lines of 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 are located on the same plane or a set of parallel planes. 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 can all be designed as oblique holes, but the center lines of the four flow channel holes are located on the same plane. This ensures that all four flow channel holes can be machined simultaneously using a single fixture, thereby reducing the manufacturing cost of the integrated independent oil circuit structure of the transmission. Furthermore, designing the first flow channel hole 31, the second flow channel hole 32, and the fourth flow channel hole 34 as oblique holes allows for the machining of three independent oil passages within the limited space of the integrated independent oil circuit structure of the transmission, improving the compactness of the integrated independent oil circuit structure.

[0052] Furthermore, the center lines of 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 can be located on four different planes, but these four planes are a set of parallel planes; such a design can also ensure that the above four flow channel holes can be machined simultaneously under a set of fixtures, reducing the manufacturing cost of the integrated independent oil circuit structure of the transmission.

[0053] In this 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 less than that of the second housing, and both the first housing and the second housing are provided with the mounting hole 38. The inner sleeve 1 includes a first inner sleeve and a second inner sleeve connected to the first inner sleeve. The outer diameter of the first inner sleeve is less than that of the second inner sleeve. The second inner sleeve is clearance-fitted with the mounting hole 38 of the first housing. Although a small amount of high-pressure oil leakage (high-pressure oil leakage from one or more of the first oil passage 101, the second oil passage 102, and the third oil passage 103) occurs due to the gap between the second inner sleeve and the mounting hole 38, this clearance fit can prevent the first housing from being damaged due to interference expansion. The interference fit between the first inner sleeve and the mounting hole 38 of the second housing prevents the second housing from expanding due to the larger wall thickness of the second housing. Furthermore, the interference fit between the first inner sleeve and the mounting hole 38 can prevent high-pressure oil leakage from the first shaft hole 21 and / or the second shaft hole 22.

[0054] Furthermore, the inner bushing 1 is clearance-fitted with the rotating shaft 2, so that the rotating shaft 2 can rotate within the inner bushing 1.

[0055] Another embodiment of the present invention provides a transmission including the above-described transmission integrated independent oil circuit structure.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission integrated independent oil circuit structure, characterized in that, The device includes an inner bushing, a rotating shaft with a first shaft hole, and a housing with a mounting hole; the inner bushing is installed in the mounting hole, and the rotating shaft is rotatably installed in the inner bushing; the housing has a first flow channel hole, a second flow channel hole, and a third flow channel hole communicating with the second flow channel hole; The second flow channel hole and the third flow channel hole constitute the first oil passage; the first flow channel hole and the first shaft hole constitute the second oil passage; The second flow channel hole is set at a second preset angle with the center line of the rotating shaft, and the third flow channel hole is set at a third preset angle with the center line of the rotating shaft; a second groove is formed by a recess on the inner wall of the mounting hole, and the second groove is blocked by the outer wall of the inner bushing to form a second oil passage; the second flow channel hole is connected to the third flow channel hole through the second oil passage.

2. The transmission integrated independent oil circuit structure according to claim 1, characterized in that, The housing is also provided with a fourth flow channel hole, and the rotating shaft is provided with a second shaft hole that communicates with the fourth flow channel hole. The center line of the first shaft hole is parallel to the center line of the second shaft hole. The fourth flow channel hole and the second shaft hole constitute the third oil passage.

3. The integrated independent oil circuit structure for the transmission according to claim 2, characterized in that, The fourth flow channel hole is set at a first preset angle with the center line of the rotating shaft; a first groove is formed by a recess on the inner wall of the mounting hole, and the first groove is blocked by the outer wall of the inner bushing to form a first oil passage; the fourth flow channel hole is connected to the second shaft hole through the first oil passage.

4. The transmission integrated independent oil circuit structure according to claim 2, characterized in that, The first shaft hole and the second shaft hole are connected; the transmission integrated independent oil circuit structure also includes a plug installed in the second shaft hole and used to separate the second shaft hole and the first shaft hole.

5. The integrated independent oil circuit structure for the transmission according to claim 1, characterized in that, The rotating shaft is also provided with a first branch flow channel hole and at least one second branch flow channel hole, both of which are connected to the first shaft hole. The housing is also provided with a connecting hole that is connected to the second branch flow channel hole. The second oil passage delivers high-pressure oil to the second oil circuit object through the first branch flow channel hole. The second oil passage also delivers high-pressure oil to the fourth oil circuit object in sequence through the second branch flow channel hole and the connecting hole.

6. The transmission integrated independent oil circuit structure according to claim 1, characterized in that, The integrated independent oil circuit structure of the transmission also includes an outer bushing that is sealed and installed on the outer wall of the housing; the outer bushing is provided with a through hole that connects to the third flow channel hole, and the first oil passage connects to the first oil circuit object through the through hole.

7. The transmission integrated independent oil circuit structure according to claim 1, characterized in that, The integrated independent oil circuit structure of the transmission also includes a static sealing ring installed between the inner bushing and the housing; and / or the integrated independent oil circuit structure of the transmission also includes a dynamic sealing ring installed between the rotating shaft and the inner bushing.

8. The integrated independent oil circuit structure for the transmission according to claim 1, characterized in that, The centerlines of the first flow channel hole, the second flow channel hole, and the third flow channel hole are located on the same plane or on a set of mutually parallel planes.

9. A gearbox, characterized in that, Includes the transmission integrated independent oil circuit structure as described in any one of claims 1 to 8.

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