CN114838114A

CN114838114A - Transmission lubricating system and transmission

Info

Publication number: CN114838114A
Application number: CN202210617972.XA
Authority: CN
Inventors: 郭晓明; 张昊杰; 冯作英; 杨保玉; 刘明; 郝芊野; 吴玉亮; 宋琳琳; 赫建勇; 王明星
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-08-02
Anticipated expiration: 2042-06-01
Also published as: CN114838114B

Abstract

The invention relates to a transmission lubricating system and a transmission, wherein the transmission lubricating system comprises a lock pin type synchronizer; the transmission comprises a transmission shell with an accommodating cavity, wherein an oil storage space is formed at the bottom of the accommodating cavity; a reduction gear rotatably provided in the transmission case; the output shaft is arranged on the transmission shell and positioned on one side of the radial direction of the reduction gear, and the output shaft is provided with an oil duct; the driving gear is rotatably sleeved on the output shaft and is provided with at least one oil inlet; a lubricating channel which sequentially passes through the reduction gear, the driving gear, the oil inlet hole, the output shaft and the oil duct is arranged in the transmission shell. According to the transmission lubricating system, the gear teeth of the reduction gear can contact lubricating oil in the oil storage space, when the reduction gear rotates, the gear teeth of the reduction gear can stir up the lubricating oil and bring the lubricating oil into the driving gear meshed with the reduction gear, the lubricating oil enters the spline pair to be lubricated through the lubricating channel, and abrasion of the spline pair to be lubricated due to insufficient lubrication is avoided.

Description

Transmission lubricating system and transmission

Technical Field

The invention relates to the technical field of mechanical transmission devices for automobiles, in particular to a transmission lubricating system and a transmission.

Background

With the development of automobile technology, in order to improve the performance of an automobile and the economic benefit of the automobile, a double-intermediate shaft transmission comes from the beginning, and generally, a lock pin type synchronizer is adopted in the double-intermediate shaft transmission, the lock pin type synchronizer comprises a sliding gear sleeve, involute spline combination teeth are arranged on two sides of the sliding gear sleeve and are respectively used for being meshed with high-gear or low-gear combination teeth of the automobile to transmit torque, and in the meshing process of gears, lubricating oil is needed for lubricating so as to avoid the spline pair formed by the combination teeth from being worn.

At present, the mode of lubricated gear commonly used includes splash lubrication and force lubrication, splash lubrication is the high-speed rotatory lubricating oil that stirs in the derailleur casing of stirring of derailleur gear, make lubricating oil splash and realize the lubrication to key spare such as gear, bearing and oil blanket, nevertheless because the spline pair of high-grade side can be sheltered from by high-grade synchronous awl assembly, splash lubrication can not satisfy the vice lubricated demand of spline, force lubrication also can not get into the vice position of spline, this just leads to the vice wearing and tearing that has produced because of lubricated badly of spline, the vice wearing and tearing of spline can cause the tooth side clearance increase, can cause the spline connection inefficacy even, influence the use of car.

Disclosure of Invention

Therefore, in order to solve the problem that the conventional lubricating method cannot meet the lubricating requirement of the high-gear side spline pair of the automobile, the invention provides a transmission lubricating system and a transmission which can meet the lubricating requirement of the high-gear side spline pair of the automobile.

According to one aspect of the present application, there is provided a transmission lubrication system including a lockpin synchronizer, the transmission lubrication system further including:

the transmission comprises a transmission shell with an accommodating cavity, wherein an oil storage space is formed at the bottom of the accommodating cavity;

the reduction gear is rotatably arranged on the transmission shell and is accommodated in the accommodating cavity, and the gear tooth part of the reduction gear is positioned in the oil storage space;

the output shaft is arranged in the transmission shell, is accommodated in the accommodating cavity and is positioned on one side of the reduction gear in the radial direction, and the output shaft is provided with an oil duct; and

the driving gear is rotatably sleeved on the output shaft, the driving gear and the reduction gear are meshed, the driving gear is provided with at least one oil inlet, and the oil inlet penetrates through the driving gear along the radial direction of the driving gear;

and a lubricating channel which sequentially passes through the reduction gear, the driving gear, the oil inlet hole, the output shaft and the oil duct is arranged in the transmission shell.

In one embodiment, the transmission lubrication system further includes a first bearing rotatably disposed on the output shaft, the driving gear is mounted on an outer circumferential surface of the first bearing, and the driving gear is in clearance fit with an outer ring of the first bearing.

In one embodiment, the first bearing is a deep groove ball bearing.

In one embodiment, the transmission lubricating system further comprises an input shaft and a baffle plate, the input shaft is mounted in the transmission shell and is accommodated in the accommodating cavity, one axial end of the input shaft is connected to the output shaft, and two sides of the driving gear are respectively mounted on the input shaft and the output shaft; the baffle is mounted at one end of the input shaft close to the output shaft, and the reduction gear, the baffle, the driving gear, the first bearing, the fastener, the output shaft, the oil inlet and the oil duct define the lubricating channel together.

In one embodiment, the drive gear comprises:

a drive gear body having a mounting cavity;

the outer gear is circumferentially coated on the outer circumferential surface of the driving gear body, the oil inlet is formed in the tooth root of the outer gear, and the outer gear is meshed with the reduction gear; and

and the inner spline gear is connected to the inner circumferential surface of the mounting cavity along the circumferential direction, and the inner spline gear is meshed with the lock pin type synchronizer to form a spline pair to be lubricated together.

In one embodiment, the lock pin type synchronizer comprises a synchronizer main body and a sliding gear sleeve, the synchronizer main body is arranged on the output shaft, the sliding gear sleeve is sleeved on the synchronizer main body in an axially movable mode, and the sliding gear sleeve and the inner spline gear are meshed to form the spline pair to be lubricated together.

In one embodiment, the oil inlet hole is formed in the tooth root of the gear teeth of the driving gear.

In one embodiment, the driving gear is provided with two symmetrical oil inlets at intervals and symmetrically.

According to another aspect of the present application, a transmission is provided comprising the transmission lubrication system described above.

In one embodiment, the transmission further comprises an input shaft and a second bearing, one end of the input shaft is connected to the output shaft, and one end of the driving gear, which is far away from the lock pin type synchronizer, is installed on the input shaft; the second bearing is sleeved on the outer circumferential surface of one end, away from the lock pin type synchronizer, of the driving gear, and the second bearing is used for positioning and limiting the driving gear.

Above-mentioned derailleur lubricating system, lockpin formula synchronous ware, reduction gear, output shaft and driving gear all accept in the intracavity of acceping that the transmission housing seted up, lubricating oil storage is in the oil storage space that the transmission housing seted up, the teeth of a cogwheel of reduction gear can contact the lubricating oil in the oil storage space, when reduction gear rotates, the teeth of a cogwheel of reduction gear can be stirred lubricating oil, and bring lubricating oil into the driving gear with it meshing, lubricating oil can get into the oil duct that the inboard and the output shaft of driving gear seted up in proper order through the inlet port that the driving gear was seted up, flow into at last and wait to lubricate the spline pair, realize treating the lubrication of lubricated spline pair, avoid waiting to lubricate the spline pair and produce wearing and tearing because the lubrication is insufficient, even cause the connection failure of spline pair.

Drawings

FIG. 1 is a schematic axial cross-sectional view of a transmission according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a dual countershaft gear set of an embodiment of the present invention;

FIG. 3 is a schematic isometric view of the corresponding output shaft of FIGS. 1 and 2 of the present invention;

FIG. 4 is a schematic illustration of a cross-sectional view of the corresponding output shaft of FIGS. 1 and 2 in accordance with the present invention;

FIG. 5 is an isometric view of the corresponding drive gear of FIGS. 1 and 2 of the present invention;

FIG. 6 is a schematic front view of the corresponding drive gear of FIGS. 1 and 2 in accordance with the present invention;

FIG. 7 is a cross-sectional view of the drive gear of FIG. 6 at position A-A in accordance with the present invention.

The reference numbers illustrate:

10. a transmission; 100. a transmission lubrication system; 110. a lockpin synchronizer; 111. a synchronizer main body; 112. a sliding gear sleeve; 1121. a sliding gear sleeve body; 1122. a splined hub; 120. a transmission housing; 121. an accommodating cavity; 122. an oil storage space; 130. a reduction gear; 140. an output shaft; 141. a groove; 142. an oil drain hole; 150. a driving gear; 151. an oil inlet hole; 153. a driving gear body; 154. an outer gear; 155. an inner spline gear; 160. a lubrication channel; 171. a first bearing; 172. an input shaft; 173. a baffle plate; 174. a fastener; 200. a spline pair to be lubricated; 210. a second bearing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 7, fig. 1 shows a schematic diagram of a transmission in a cross-sectional structure of two intermediate shaft axes in an embodiment of the present invention, fig. 2 shows a schematic diagram of a double intermediate shaft gear pair structure in an embodiment of the present invention, fig. 3 shows a schematic diagram of an axonometric view of a corresponding output shaft in fig. 1 and 2, fig. 4 shows a schematic diagram of a cross-sectional view of a corresponding output shaft in fig. 1 and 2, fig. 5 shows a schematic diagram of an axonometric view of a corresponding drive gear in fig. 1 and 2, fig. 6 shows a schematic diagram of a front view of a corresponding drive gear in fig. 1 and 2, and fig. 7 shows a schematic diagram of a cross-sectional view of a position a-a of the drive gear in fig. 6 of the present invention.

The application provides a derailleur lubricating system 100, derailleur lubricating system 100 includes lockpin formula synchronous ware 110, have the derailleur casing 120 who accepts the chamber 121 and accept reduction gear 130, output shaft 140 and driving gear 150 in the chamber 121 of acceping of derailleur casing 120, derailleur casing 120 has still seted up oil storage space 122, lubricating oil is stored in oil storage space 122, the teeth of a cogwheel of reduction gear 130 can contact the lubricating oil in the oil storage space 122, driving gear 150 sets up inlet port 151, the oil duct has been seted up to output shaft 140. The transmission housing 120 has a lubrication passage 160 (as shown by an arrow in fig. 1) passing through the reduction gear 130, the driving gear 150, the oil inlet 151 formed in the driving gear 150, the output shaft 140, and the oil passage formed in the output shaft 140 in sequence.

So, reduction gear 130 can realize stirring oil at the pivoted in-process to reduction gear 130 is when meshing with driving gear 150, and lubricating oil can enter into the driving gear 150 inboard through the inlet port 151 that driving gear 150 seted up, and then flows through whole lubrication channel 160, and flows out from the oil duct with lubricated vice 200 of waiting to lubricate, avoids waiting to lubricate the vice 200 of spline and produces wearing and tearing because lubricated inadequately, causes the connection of spline pair to become invalid even.

Specifically, referring to fig. 1 and 2, the transmission case 120 is a hollow structure having a substantially solid body as a whole, the transmission case 120 is opened with a receiving cavity 121, an oil storage space 122 is formed at the bottom of the receiving cavity 121, and the oil storage space 122 is used for storing lubricating oil. Thus, the accommodating cavity 121 can accommodate the reduction gear 130, the output shaft 140 and the driving gear 150, the lubricating oil can be used for lubricating the spline pair 200 to be lubricated, and a driver can add the lubricating oil into the oil storage space 122 at any time, so that the operation is convenient.

The reduction gear 130 is a solid of revolution as a whole, the reduction gear 130 is rotatably disposed in the transmission housing 120 and is accommodated in the accommodating cavity 121 formed in the transmission housing 120, and the gear teeth of the reduction gear 130 can be accommodated in the oil storage space 122 (i.e., the gear teeth of the reduction gear 130 can be accommodated in the oil storage space 122 in sequence during the rotation process). So, the teeth of a cogwheel part of reduction gear 130 can contact the lubricating oil of storage in oil storage space 122, and when reduction gear 130 rotated, lubricating oil can realize the lubrication to the teeth of a cogwheel of reduction gear 130, and simultaneously, reduction gear 130 can stir lubricating oil, and when reduction gear 130 and driving gear 150 meshing, lubricating oil can also get into the teeth of a cogwheel of meshing gear pair with lubricated driving gear 150, avoids the meshing gear pair to produce wearing and tearing, improves the life of gear pair.

Referring to fig. 3 and 4, the output shaft 140 is integrally a revolving body structure, the output shaft 140 is mounted on the transmission housing 120 and is accommodated in the accommodating cavity 121 formed in the transmission housing 120, the output shaft 140 is located on one side of the reduction gear 130 in the radial direction, and the output shaft 140 is provided with an oil passage. Specifically, one end of the output shaft 140 is provided with a groove 141 along the axial direction thereof, the groove 141 is a blind hole that does not penetrate through the output shaft 140, the output shaft 140 is further provided with an oil drain hole 142 along the radial direction thereof, one end of the oil drain hole 142 is communicated with the groove 141, and the other end of the oil drain hole 142 is communicated with the spline pair 200 to be lubricated. Wherein the groove 141 and the oil discharge hole 142 together form an oil passage.

Referring to fig. 5, 6 and 7, the driving gear 150 is a hollow structure integrally formed as a revolving body, the driving gear 150 is rotatably sleeved at one end of the output shaft 140 where the groove 141 is formed, the driving gear 150 and the output shaft 140 are coaxially disposed, the driving gear 150 is formed with at least one oil inlet 151, and the oil inlet 151 penetrates through the driving gear 150 along the radial direction of the driving gear 150. In a preferred embodiment, the oil inlet 151 is disposed at the tooth root of the gear teeth of the driving gear 150, and the driving gear 150 is spaced and symmetrically disposed with two oil inlets 151.

Specifically, in one embodiment, the drive gear 150 includes a drive gear body 153, an outer gear 154, and an inner spline gear 155. The driving gear body 153 is provided with a mounting cavity, the mounting cavity penetrates through the driving gear body 153 along the axial direction of the driving gear body 153, and the driving gear body 153 is arranged on the output shaft 140 and is coaxial with the output shaft 140; the outer gear 154 is circumferentially wrapped on the outer circumferential surface of the driving gear body 153, the oil inlet 151 is formed in the tooth root of the gear teeth of the outer gear 154, and the outer gear 154 is meshed with the reduction gear 130; the inside spline gear 155 is axially connected to the inner circumferential surface of the mounting cavity, and the inside spline gear 155 and the lockpin synchronizer 110 are engaged to form the spline pair 200 to be lubricated together.

So, when reduction gear 130 and driving gear 150 mesh, lubricating oil on the teeth of a cogwheel of reduction gear 130 can get into driving gear 150 through inlet port 151, and output shaft 140 is located to driving gear 150 cover, at this moment, lubricating oil can get into output shaft 140 and recess 141, get into oil drain hole 142 from recess 141 again, lubricating oil just can flow into along oil drain hole 142 and wait to lubricate spline pair 200, thereby realize treating the lubrication of lubricated spline pair 200, avoid waiting to lubricate spline pair 200 and produce wearing and tearing because of the lubrication is insufficient, even take place the connection of spline pair and lose efficacy, influence the normal work of derailleur lubricating system 100.

The lock pin type synchronizer 110 is generally in a revolving body structure as a whole, the lock pin type synchronizer 110 includes a synchronizer main body 111 and a sliding gear sleeve 112, the synchronizer main body 111 is disposed at one end of the output shaft 140 far away from the baffle 173, the sliding gear sleeve 112 is sleeved on the synchronizer main body 111 in an axially movable manner, the sliding gear sleeve 112 can also rotate around the output shaft 140, and the sliding gear sleeve 112 is engaged with the inner spline gear 155 of the driving gear 150 to form the spline pair 200 to be lubricated together. Specifically, in an embodiment, the sliding sleeve gear 112 includes a sliding sleeve gear body 1121 and a spline hub 1122, the sliding sleeve gear body 1121 is axially movably sleeved on the synchronizer main body 111, the spline hub 1122 is mounted on an inner circumferential surface of the sliding sleeve gear body 1121, and the spline hub 1122 can be meshed with the inner spline gear 155 of the driving gear 150 to form the spline pair 200 to be lubricated together.

The reduction gear 130, the output shaft 140, the groove 141, the oil discharge hole 142, the driving gear 150 and the oil inlet 151 jointly form a lubricating channel 160, lubricating oil sequentially passes through the reduction gear 130, the driving gear 150, the oil inlet 151, the output shaft 140, the groove 141 and the oil discharge hole 142 and then flows into the spline pair 200 to be lubricated, lubrication of the spline pair 200 to be lubricated is achieved, abrasion of the spline pair 200 to be lubricated due to insufficient lubrication is avoided, and even connection failure of the spline pair is avoided.

In some embodiments, the transmission lubrication system 100 also includes a first bearing 171. The first bearing 171 is a revolving body structure as a whole, the first bearing 171 is rotatably sleeved at one end of the output shaft 140 close to the groove 141, the first bearing 171 is coaxial with the output shaft 140, the driving gear 150 is mounted on the outer circumferential surface of the first bearing 171, and the driving gear 150 is in clearance fit with the first bearing 171. In a preferred embodiment, the first bearing 171 is a deep groove ball bearing.

In this way, the driving gear 150 can be mounted on the output shaft 140 through the first bearing 171, thereby preventing the wear of the output shaft 140, and at the same time, since the driving gear 150 and the first bearing 171 are in clearance fit, the lubricating oil can enter the first bearing 171 from the oil inlet 151, thereby lubricating the first bearing 171 and preventing the wear of the first bearing 171.

In some embodiments, the transmission lubrication system 100 also includes an input shaft 172 and a baffle 173. The input shaft 172 is mounted to the transmission case 120 and is accommodated in the accommodating chamber 121, one axial end of the input shaft 172 is connected to the output shaft 140, and both sides of the drive gear 150 are mounted to the input shaft 172 and the output shaft 140, respectively. The baffle 173 is mounted on one end of the input shaft 172 close to the output shaft 140 through a fastener 174, the fastener 174 is partially positioned in a groove 141 formed in the output shaft 140, a gap exists between the groove 141 and the fastener 174, and a gap exists between the baffle 173 and the output shaft 140 and the first bearing 171. In this way, the reduction gear 130, the output shaft 140, the groove 141, the driving gear 150, the first bearing 171, the baffle 173 and the fastening member 174 define and form the above-mentioned sealed lubrication channel 160, and the lubricating oil can flow into the spline pair 200 to be lubricated through the lubrication channel 160 (including the above-mentioned gap), so as to lubricate the spline pair 200 to be lubricated, and avoid the spline pair 200 to be lubricated from being worn due to insufficient lubrication, and even avoid the connection failure of the spline pair.

The present application further provides a transmission 10, the transmission 10 including the transmission lubrication system 100 described above. The transmission 10 further includes an input shaft 172 and a second bearing 210, wherein one end of the input shaft 172 is connected to the output shaft 140, one end of the driving gear 150 away from the locking pin synchronizer 110 is mounted on the input shaft 172, the second bearing 210 is sleeved on an outer circumferential surface of one end of the driving gear 150 away from the locking pin synchronizer 110, and the second bearing 210 is used for positioning and limiting the driving gear 150.

In this way, the second bearing 210 can ensure the mounting accuracy of the drive gear 150, and the spline hub 1122 of the sliding sleeve gear 112 can be properly engaged with the inner spline gear 155 of the drive gear 150, thereby completing the speed change.

In summary, the detent synchronizer 110, the reduction gear 130, the output shaft 140 and the drive gear 150 can be accommodated in the accommodating chamber 121 formed in the transmission case 120, the lubricating oil can be stored in the oil storage space 122 formed in the transmission case 120, the gear teeth of the reduction gear 130 can contact the lubricating oil in the oil storage space 122, when the reduction gear 130 rotates, the gear teeth of the reduction gear 130 can stir up the lubricating oil, the lubricating oil is brought into the driving gear 150 engaged with the driving gear, the lubricating oil can sequentially enter the inner side of the driving gear 150 and the groove 141 formed in the output shaft 140 through the oil inlet 151 formed in the driving gear 150, and finally flows into the spline pair 200 to be lubricated from the oil outlet 142 formed in the output shaft 140, so that the lubrication of the spline pair 200 to be lubricated is realized, and the problem that the spline pair 200 to be lubricated is abraded due to insufficient lubrication and even the connection failure of the spline pair is caused is avoided; the driving gear 150 can be mounted on the output shaft 140 through the first bearing 171 to prevent the wear of the output shaft 140, and meanwhile, since the driving gear 150 and the first bearing 171 are in clearance fit, the lubricating oil can enter the first bearing 171 from the oil inlet 151 to lubricate the first bearing 171 to prevent the wear of the first bearing 171; one side of the baffle 173 abuts against the input shaft 172, and a gap is left between the other side of the baffle 173 and the output shaft 140 and the first bearing 171, so that the lubricating oil can smoothly enter the groove 141 and the oil discharge hole 142, and a complete sealed lubricating channel 160 is formed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A transmission lubrication system including a lockpin synchronizer, the transmission lubrication system further comprising:

2. The transmission lubrication system of claim 1, further comprising a first bearing rotatably disposed about said output shaft, said drive gear being mounted about an outer circumference of said first bearing, said drive gear being in clearance fit with said first bearing outer race.

3. The transmission lubrication system of claim 2, wherein the first bearing is a deep groove ball bearing.

4. The transmission lubrication system according to claim 2, further comprising an input shaft and a baffle, wherein the input shaft is mounted to the transmission housing and received in the receiving cavity, one axial end of the input shaft is connected to the output shaft, and both sides of the drive gear are mounted to the input shaft and the output shaft, respectively; the baffle is mounted at one end of the input shaft close to the output shaft, and the reduction gear, the baffle, the driving gear, the first bearing, the fastener, the output shaft, the oil inlet and the oil duct define the lubricating channel together.

5. The transmission lubrication system of claim 1, wherein the drive gear comprises:

a drive gear body having a mounting cavity;

6. The transmission lubrication system according to claim 5, wherein the lockpin synchronizer includes a synchronizer body provided to the output shaft and a sliding sleeve gear that is axially movably sleeved to the synchronizer body, the sliding sleeve gear and the internal spline gear being engaged to collectively form the spline pair to be lubricated.

7. The transmission lubrication system of claim 1, wherein said oil inlet port opens at the root of the gear teeth of said drive gear.

8. The transmission lubrication system of claim 1, wherein said drive gear has two symmetrically disposed oil inlet holes spaced apart and symmetrically disposed therein.

9. Transmission characterized in that it comprises a transmission lubrication system according to any one of claims 1 to 8.

10. The transmission of claim 9, further comprising an input shaft having one end connected to the output shaft and a second bearing, wherein an end of the drive gear remote from the lockpin synchronizer is mounted to the input shaft; the second bearing is sleeved on the outer circumferential surface of one end, far away from the lock pin type synchronizer, of the driving gear, and the second bearing is used for positioning and limiting the driving gear.