CN219062402U

CN219062402U - Gearbox power take-off

Info

Publication number: CN219062402U
Application number: CN202320090548.4U
Authority: CN
Inventors: 孙志宾; 陈岩; 亓斌; 王东坤; 张亚震; 周明辉
Original assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Current assignee: Weichai Hydraulic Transmission Co ltd; Weichai Power Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-05-23
Anticipated expiration: 2033-01-31

Abstract

The utility model relates to the technical field of power output of gearboxes, and discloses a power output device of a gearbox, wherein a reversing gear and a clutch assembly are separated from lubricating oil at the bottom of a shell through an oil stirring prevention assembly, so that oil stirring loss of the reversing gear and the clutch assembly is reduced when the power output device of the gearbox works, and the power transmission efficiency is improved; simultaneously, lubricating oil is sent into the lubricating oil cavity through a lubricating oil duct on the transmission shaft so as to lubricate the matching surfaces of the reversing gear and the transmission shaft; in addition, adopt the casing fixed anti-stirring oil subassembly, improved the stability of anti-stirring oil subassembly.

Description

Gearbox power take-off

Technical Field

The utility model relates to the technical field of gearbox power output, in particular to a gearbox power output device.

Background

The output shaft of the gearbox power output device is provided with a forward gear and a backward gear, and the forward gear and the backward gear can rotate relative to the output shaft. In order to realize the switching of the forward gear and the backward gear, the output shaft is also provided with a clutch, and the forward gear or the backward gear is fixed relative to the output shaft through the clutch.

The clutch, the forward gear and the reverse gear are rotatably arranged in a shell of the power output device of the gearbox, lubricating oil is arranged at the bottom of the shell, the lower ends of the clutch, the forward gear and the reverse gear are immersed in the lubricating oil, and the lubricating oil at the bottom of the shell is brought into the clutch, the forward gear and the reverse gear for lubrication by utilizing the rotation of the clutch, the forward gear and the reverse gear, but the oil stirring loss is large due to the arrangement.

Disclosure of Invention

The utility model aims to provide a gearbox power output device which can reduce oil stirring loss during operation of the gearbox power output device.

To achieve the purpose, the utility model adopts the following technical scheme:

the gearbox power output device comprises a shell, a transmission shaft, reversing gears and a clutch assembly, wherein the reversing gears and the clutch assembly are all arranged in the shell, two ends of the transmission shaft are rotatably arranged on two opposite side walls of the shell, at least one end of the transmission shaft penetrates out of the shell, the reversing gears are rotatably sleeved outside the transmission shaft, and the clutch assembly is configured to enable the reversing gears to be fixed relative to the transmission shaft;

a lubricating oil cavity is arranged between the outer peripheral wall of the transmission shaft and the inner peripheral wall of the reversing gear, a lubricating oil duct is arranged on the transmission shaft, one end of the lubricating oil duct extends to the outer peripheral wall of the transmission shaft to form a lubricating oil inlet, and the lubricating oil duct is communicated with the lubricating oil cavity;

the gearbox power take-off still including being located in the casing and fixed connection in prevent stirring oil subassembly of casing, prevent stirring oil subassembly be located the below of reversing gear and with reversing gear interval sets up, prevent stirring oil subassembly be used for with reversing gear with clutch pack with lubricating oil of casing bottom separates.

As an optional solution of the above gearbox power output apparatus, the anti-stirring oil assembly includes:

the fixed plate is fixedly arranged on the shell;

the oil stirring baffle is an arc plate concavely arranged downwards, one end of the oil stirring baffle is fixed with the fixed plate, and the other end of the oil stirring baffle is fixedly connected with the shell; the lower end of the reversing gear is positioned in the arc-shaped groove of the arc-shaped plate.

As an alternative solution of the above gearbox power take-off, the fixing plate is connected to the housing by a plurality of fasteners distributed at intervals in the circumferential direction.

As an alternative technical scheme of the gearbox power output device, one end of the oil stirring baffle is inserted into the fixed plate, and the other end of the oil stirring baffle is inserted into the shell; the both ends of stirring oil baffle respectively butt in the fixed plate with the inner wall of casing.

As an alternative technical scheme of the gearbox power output device, one end of the oil stirring baffle is provided with a plurality of front inserting convex parts which are circumferentially distributed at intervals, the fixed plate is provided with front inserting grooves which are in one-to-one correspondence with the front inserting convex parts, and the front inserting convex parts are inserted with the corresponding front inserting grooves;

the other end of the oil stirring baffle is provided with a plurality of rear inserting convex parts which are circumferentially distributed at intervals, the inner wall of the shell is provided with rear inserting grooves which are in one-to-one correspondence with the rear inserting convex parts, and the rear inserting convex parts are inserted into the corresponding rear inserting grooves.

As an optional technical scheme of the gearbox power output device, the oil stirring baffle comprises a front baffle, a connecting plate and a rear baffle which are sequentially arranged along the axial direction of the transmission shaft, wherein the front baffle, the rear baffle and the connecting plate are arc-shaped plates, and the inner diameters of the front baffle and the rear baffle are different;

the both ends of preceding baffle respectively with the fixed plate with the connecting plate grafting and butt, the both ends of back baffle respectively with the connecting plate with the inner wall grafting and butt of casing.

As an alternative technical scheme of the gearbox power output device, the connecting plate is provided with a plurality of inner inserting grooves which are distributed at intervals in the circumferential direction and a plurality of outer inserting grooves which are distributed at intervals in the circumferential direction, and the inner inserting grooves are positioned on the radial inner side of the connecting plate of the outer inserting grooves;

the front partition plate is provided with inner inserting convex parts which are in one-to-one correspondence with the inner inserting grooves and are inserted, and the rear partition plate is provided with outer inserting convex parts which are in one-to-one correspondence with the outer inserting grooves and are inserted.

As an alternative to the above gearbox power output apparatus, the clutch assembly includes:

the first tooth cog sleeve is fixed on the reversing gear;

the clutch sleeve is fixedly sleeved outside the transmission shaft, a clutch oil cavity is formed in the clutch sleeve, and the clutch oil cavity is connected with an oil supply assembly;

the clutch piston is fixedly connected with the second tooth-inserting sleeve, the clutch piston is limited to rotate relative to the clutch sleeve, and the clutch piston is slidably arranged in the clutch oil cavity along the axial direction of the clutch sleeve so as to enable the first tooth-inserting sleeve and the second tooth-inserting sleeve to be meshed or separated;

the clutch elastic piece is used for enabling the second tooth-inserting sleeve to have a movement trend away from the first tooth-inserting sleeve along the axial direction of the clutch sleeve.

As an alternative technical scheme of the gearbox power output device, two reversing gears are arranged, and the rotation directions of the two reversing gears are opposite; the reversing gear, the clutch oil cavity, the first tooth socket, the second tooth socket and the clutch elastic piece are uniformly and correspondingly arranged;

the oil supply assembly is selectively communicable with at most one of the two clutch oil chambers.

As an optional technical scheme of the gearbox power output device, the transmission shaft is fixedly sleeved with a bearing bush, the reversing gear is rotatably sleeved outside the bearing bush, the inner peripheral wall of the bearing bush is provided with an inner annular oil groove, the outer peripheral wall of the bearing bush is provided with an outer annular oil groove, the inner annular oil groove is communicated with the outer annular oil groove, and the inner annular oil groove is communicated with the lubricating oil duct to form the lubricating oil cavity.

The utility model has the beneficial effects that: according to the gearbox power output device provided by the utility model, the reversing gear and the clutch assembly are separated from lubricating oil at the bottom of the shell through the oil stirring prevention assembly, so that the oil stirring loss of the reversing gear and the clutch assembly is reduced when the gearbox power output device works, and the power transmission efficiency is improved; simultaneously, lubricating oil is sent into the lubricating oil cavity through a lubricating oil duct on the transmission shaft so as to lubricate the matching surfaces of the reversing gear and the transmission shaft; in addition, adopt the casing fixed anti-stirring oil subassembly, improved the stability of anti-stirring oil subassembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a transmission power take-off provided in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a transmission power take-off provided by an embodiment of the present utility model;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

fig. 4 is a front view of a fixing plate provided in an embodiment of the present utility model;

fig. 5 is a cross-sectional view of a connection plate provided by an embodiment of the present utility model.

In the figure:

1. a transmission shaft; 11. a lubrication oil passage; 111. an axial oil passage; 112. a radial oil passage;

2. a forward gear; 3. a reverse gear;

4. bearing bush; 41. an inner annular oil groove; 42. an outer annular oil groove; 43. radial oil path;

5. a clutch assembly; 51. a first tooth socket; 52. a clutch sleeve; 521. a clutch oil chamber; 53. a clutch piston; 54. a second tooth socket; 55. a clutch elastic member;

6. an anti-churning assembly; 61. a fixing plate; 611. a through hole; 612. a front insertion groove; 62. a front baffle; 63. a connecting plate; 631. an inner insertion groove; 632. an outer insertion groove; 64. a rear partition;

7. a fixed sleeve;

8. and an oil supply cavity.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 5, the present embodiment provides a power output device of a gearbox, which includes a housing, a transmission shaft 1, and a reversing gear and a clutch assembly 5 all disposed in the housing, wherein two ends of the transmission shaft 1 are rotatably mounted on two opposite side walls of the housing, at least one end of the transmission shaft penetrates out of the housing, the reversing gear is rotatably sleeved outside the transmission shaft 1, and the clutch assembly 5 is configured to fix the reversing gear relative to the transmission shaft 1.

A lubricating oil cavity is arranged between the outer peripheral wall of the transmission shaft 1 and the inner peripheral wall of the reversing gear, a lubricating oil duct 11 is arranged on the transmission shaft 1, one end of the lubricating oil duct 11 extends to the outer peripheral wall of the transmission shaft 1 to form a lubricating oil inlet, and the lubricating oil duct 11 is communicated with the lubricating oil cavity; the gearbox power take-off still includes that lie in the casing and fixed connection prevents stirring oil subassembly 6 in the casing, prevents stirring oil subassembly 6 lie in the below of switching-over gear and with switching-over gear interval setting, prevents stirring oil subassembly 6 be used for separating switching-over gear and clutch pack 5 with the lubricating oil of casing bottom.

According to the gearbox power output device provided by the embodiment, the reversing gear and the clutch assembly 5 are separated from lubricating oil at the bottom of the shell through the oil stirring prevention assembly 6, so that oil stirring loss of the reversing gear and the clutch assembly 5 during working of the gearbox power output device is reduced; simultaneously, the lubricating oil is sent into the lubricating oil cavity through the lubricating oil duct 11 on the transmission shaft 1 so as to lubricate the matching surfaces of the reversing gear and the transmission shaft 1; in addition, the anti-stirring oil component 6 is fixed by adopting the shell, so that the stability of the anti-stirring oil component 6 is improved.

Specifically, as shown in fig. 2 and 3, the lubrication oil passage 11 includes an axial oil passage 111 and a radial oil passage 112, the axial oil passage 111 is provided penetrating in the axial direction of the drive shaft 1, and both ends of the axial oil passage 111 are provided with plugs in a sealing manner to prevent oil leakage. The radial oil passage 112 extends in the radial direction of the drive shaft 1, and one end of the radial oil passage 112 communicates with the axial oil passage 111, and the other end extends to the outer peripheral wall of the drive shaft 1.

The radial oil passage 112 is provided in plurality, one of which serves as an oil inlet passage and the other of which serves as an oil outlet passage. When the gearbox power take-off is used for a gearbox, the gearbox is provided with a lubricating oil pump, the lubricating oil pump sends lubricating oil into the axial oil duct 111 through an oil inlet channel, and then sends the lubricating oil into a lubricating oil cavity through an oil outlet channel to lubricate a matching surface between the steering gear and the transmission shaft 1.

Further, as shown in fig. 2 and 3, in order to reduce friction between the reversing gear and the transmission shaft 1, the transmission shaft 1 is fixedly sleeved with a bearing bush 4, the reversing gear is rotatably sleeved outside the bearing bush 4, an inner circumferential wall of the bearing bush 4 is provided with an inner annular oil groove 41, an outer circumferential wall of the bearing bush 4 is provided with an outer annular oil groove 42, the inner annular oil groove 41 and the outer annular oil groove 42 are communicated, and the inner annular oil groove 41 is communicated with the lubricating oil duct 11 to form the lubricating oil cavity.

Illustratively, the bearing bush 4 is provided with a radial oil passage 43, one end of the radial oil passage 43 extends to an inner bottom wall of the inner annular oil groove 41, and the other end extends to an inner bottom wall of the outer annular oil groove 42. The lubricating oil in the axial lubricating oil passage 11 enters the inner annular oil groove 41 through the radial lubricating oil passage 11, and the lubricating oil in the inner annular oil groove 41 enters the outer annular oil groove 42 through the radial oil passage 43, so that the mating surfaces of the bearing bush 4 and the reversing gear are lubricated by the lubricating oil in the outer annular oil groove 42.

Optionally, as shown in fig. 1, 2, 4 and 5, the anti-stirring component 6 includes a fixing plate 61 and a stirring baffle, where the fixing plate 61 is fixedly installed on the housing, the stirring baffle is an arc plate concavely arranged downwards, one end of the stirring baffle is fixed with the fixing plate 61, and the other end is fixedly connected with the housing; the lower end of the reversing gear is positioned in the arc-shaped groove of the arc-shaped plate.

Specifically, the fixing plate 61 is connected to the housing by a plurality of fasteners circumferentially spaced apart. One end of the oil stirring baffle is inserted into the fixed plate 61, and the other end is inserted into the shell; both ends of the oil stirring baffle are respectively abutted against the fixed plate 61 and the inner wall of the housing. The oil stirring baffle comprises a front baffle plate 62, a connecting plate 63 and a rear baffle plate 64 which are sequentially arranged along the axial direction of the transmission shaft 1, wherein the front baffle plate 62, the rear baffle plate 64 and the connecting plate 63 are arc-shaped plates, and the inner diameters of the front baffle plate 62 and the rear baffle plate 64 are different; both ends of the front partition plate 62 are respectively inserted into and abutted against the fixing plate 61 and the connecting plate 63, and both ends of the rear partition plate 64 are respectively inserted into and abutted against the connecting plate 63 and the inner wall of the housing.

The anti-stirring oil component 6 provided by the embodiment is characterized in that the fixing plate 61 is connected with the shell only through the fastening piece, and the front partition plate 62 is fixed with the fixing plate 61, the front partition plate 62, the connecting plate 63, the rear partition plate 64 and the connecting plate 63 in an inserting mode, so that the structure is simple, and the installation is convenient and quick.

Illustratively, one end of the oil stirring baffle is provided with a plurality of front inserting convex parts which are circumferentially distributed at intervals, and the fixing plate 61 is provided with front inserting grooves 612 which are in one-to-one correspondence with the front inserting convex parts, and the front inserting convex parts are inserted into the corresponding front inserting grooves 612. The other end of the oil stirring baffle is provided with a plurality of rear plug-in convex parts which are circumferentially distributed at intervals, the inner wall of the shell is provided with rear plug-in grooves which are in one-to-one correspondence with the rear plug-in convex parts, and the rear plug-in convex parts are plugged with the corresponding rear plug-in grooves.

The connecting plate 63 is provided with a plurality of inner inserting grooves 631 and a plurality of outer inserting grooves 632 which are circumferentially distributed at intervals; the front partition plate 62 has inner insertion protrusions corresponding to the inner insertion grooves 631 one by one and inserted, and the rear partition plate 64 has outer insertion protrusions corresponding to the outer insertion grooves 632 one by one and inserted.

Illustratively, the front mating groove 612, the rear mating groove, the inner mating groove 631, and the outer mating groove 632 are arc-shaped grooves, and the front mating protrusion, the rear mating protrusion, the inner mating protrusion, and the outer mating protrusion are arc-shaped structures corresponding to the corresponding arc-shaped grooves, respectively.

Optionally, the front partition plate 62, the rear partition plate 64 and the connecting plate 63 are arc plates with central angles smaller than 180 degrees, so that the strength requirement on fasteners used for connecting the fixed plate 61 and the shell can be reduced, and meanwhile, the interference of the front partition plate 62, the connecting plate 63 and the rear partition plate 64 on the actions of the reversing gears and the clutch assembly 5 can be effectively avoided; and reduces the weight of the anti-churning assembly 6.

Optionally, the fixing plate 61 is an annular plate, and the fixing plate 61 is sleeved outside the clutch assembly 5, so that the stability of the whole anti-stirring assembly 6 when connected with the housing can be improved through the connection between the fixing plate 61 and the housing.

Alternatively, as shown in fig. 2, the clutch assembly 5 includes a first jaw sleeve 51, a clutch sleeve 52, a clutch piston 53, a second jaw sleeve 54, and a clutch elastic member 55, wherein the first jaw sleeve 51 is fixed to the reversing gear; the clutch sleeve 52 is fixedly sleeved outside the transmission shaft 1, a clutch oil cavity 521 is arranged on the clutch sleeve 52, and the clutch oil cavity 521 is connected with an oil supply assembly; the clutch piston 53 is fixedly connected with the second tooth-inserting sleeve 54, the clutch piston 53 is limited to rotate relative to the clutch sleeve 52, and the clutch piston 53 is slidably arranged in the clutch oil cavity 521 along the axial direction of the clutch sleeve 52 so as to enable the first tooth-inserting sleeve 51 and the second tooth-inserting sleeve 54 to be engaged or disengaged; the clutch elastic member 55 serves to cause the second jaw case 54 to have a movement tendency away from the first jaw case 51 in the axial direction of the clutch case 52.

When the oil supply unit feeds hydraulic oil into the clutch oil chamber 521, the hydraulic oil in the clutch oil chamber 521 provides a force to the second cog sleeve 54 through the clutch piston 53, which can axially slide the second cog sleeve 54 relative to the clutch sleeve 52 and approach the first cog sleeve 51.

When the oil pressure of the lubricating oil in the clutch oil chamber 521 is small, the second cog sleeve 54 is kept in a separated state separated from the first cog sleeve 51 by the clutch elastic member 55, and at this time, power is transmitted to the first cog sleeve 51 through the reversing gear, the reversing gear and the first cog sleeve 51 rotate relative to the transmission shaft 1, and the transmission shaft 1 has no power output, namely, a so-called neutral state.

When the reversing gear and the transmission shaft 1 are required to be relatively fixed for power transmission, the oil supply assembly sends hydraulic oil into the clutch oil cavity 521, and the clutch piston 53 drives the second tooth socket 54 to axially slide relative to the clutch socket 52 and approach the first tooth socket 51 under the pushing action of lubricating oil in the clutch oil cavity 521, so that the first tooth socket 51 and the second tooth socket 54 are meshed, and the second tooth socket 54 is switched to a meshed state meshed with the first tooth socket 51. The power is output through the reversing gear, the first tooth socket 51, the second tooth socket 54, the clutch socket 52 and the transmission shaft 1, and through the transmission shaft 1.

Further, two reversing gears are arranged, and the rotation directions of the two reversing gears are opposite; the reversing gear, the clutch oil cavity 521, the first tooth socket 51, the second tooth socket 54 and the clutch elastic member 55 are uniformly and correspondingly arranged; the oil supply assembly is selectively communicable with at most one of the two clutch oil chambers 521.

For convenience of description, the two reversing gears are respectively referred to as a forward gear 2 and a reverse gear 3, and when the above-described transmission power output apparatus is used in a transmission, a forward output gear meshed with the forward gear 2 and a reverse output gear meshed with the reverse gear 3 are provided in the transmission. The clutch assembly 5 controls the engagement of the first tooth socket 51 and the corresponding second tooth socket 54 connected with the forward gear 2, and the power is output through the forward output gear, the forward gear 2, the first tooth socket 51 connected with the forward gear 2, the second tooth socket 54 corresponding to the first tooth socket 51, the clutch piston 53, the clutch sleeve 52 and the transmission shaft 1, so that the forward power is output through the transmission shaft 1. The clutch assembly 5 controls the engagement of the first tooth socket 51 and the corresponding second tooth socket 54 connected with the reverse gear 3, and the power is output through the reverse output gear, the reverse gear 3, the first tooth socket 51 connected with the reverse gear 3, the second tooth socket 54 corresponding to the first tooth socket 51, the clutch piston 53, the clutch sleeve 52 and the transmission shaft 1, so that the power can be output through the transmission shaft 1.

In the case of power output by the above-described transmission power output apparatus, only one set of the first and

second cog jackets

51, 54 is in the engaged state, and the other set of the first and

second cog jackets

51, 54 is in the disengaged state, out of the combination of the two sets of the first and

second cog jackets

51, 54.

Optionally, the clutch sleeve 52 is sleeved with a fixed sleeve 7, the fixed sleeve 7 is fixed on the shell, an oil supply cavity 8 is arranged between the clutch sleeve 52 and the fixed sleeve 7, the oil supply cavity 8 corresponds to the clutch oil cavity 521 one by one, an oil supply port communicated with the oil supply cavity 8 one by one is arranged on the fixed sleeve 7, the oil supply assembly comprises an oil supply pump and an oil supply valve, and an outlet of the oil supply pump is selectively communicated with at most one of the two oil supply ports through the oil supply valve. The outlet of the oil supply pump can be communicated with any oil supply port or not communicated with both oil supply ports according to the requirements.

When the gearbox power output device is used for a vehicle, the transmission shaft 1 is connected with the four-wheel drive structure of the vehicle, so that the power of the gearbox is transmitted to the four-wheel drive structure of the vehicle through the gearbox power output device.

Optionally, the front partition 62 faces the clutch assembly 5, the rear partition 64 faces the forward gear 2, and the aperture of the rear partition 64 is larger than that of the front partition 62, so as to meet the requirement of the clutch assembly 5 and the forward gear 2 on the installation space.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. The gearbox power output device comprises a shell, a transmission shaft (1), reversing gears and a clutch assembly (5), wherein the reversing gears and the clutch assembly are all arranged in the shell, two ends of the transmission shaft (1) are rotatably arranged on two opposite side walls of the shell, at least one end of the reversing gears penetrates out of the shell, the reversing gears are rotatably sleeved outside the transmission shaft (1), and the clutch assembly (5) is configured to enable the reversing gears to be fixed relative to the transmission shaft (1);

the transmission shaft is characterized in that a lubricating oil cavity is formed between the outer peripheral wall of the transmission shaft (1) and the inner peripheral wall of the reversing gear, a lubricating oil duct (11) is formed in the transmission shaft (1), one end of the lubricating oil duct (11) extends to the outer peripheral wall of the transmission shaft (1) to form a lubricating oil inlet, and the lubricating oil duct (11) is communicated with the lubricating oil cavity;

the gearbox power take-off also includes being located in the casing and fixed connection in prevent stirring oil subassembly (6) of casing, prevent stirring oil subassembly (6) be located the below of switching-over gear and with switching-over gear interval sets up, prevent stirring oil subassembly (6) be used for with switching-over gear with separation and reunion subassembly (5) with lubricating oil of casing bottom separates.

2. A gearbox power take-off according to claim 1, wherein the anti-churning assembly (6) comprises:

a fixing plate (61), the fixing plate (61) being fixedly mounted to the housing;

the oil stirring baffle is an arc plate concavely arranged downwards, one end of the oil stirring baffle is fixed with the fixed plate (61), and the other end of the oil stirring baffle is fixedly connected with the shell; the lower end of the reversing gear is positioned in the arc-shaped groove of the arc-shaped plate.

3. A transmission power take off as claimed in claim 2, wherein the fixed plate (61) is connected to the housing by a plurality of circumferentially spaced fasteners.

4. A gearbox power take-off according to claim 2, characterised in that one end of the oil-stirring baffle is plugged with the fixed plate (61) and the other end is plugged with the housing; the two ends of the oil stirring baffle are respectively abutted against the fixed plate (61) and the inner wall of the shell.

5. The gearbox power output device according to claim 4, wherein one end of the oil stirring baffle is provided with a plurality of front inserting convex parts which are circumferentially distributed at intervals, the fixed plate (61) is provided with front inserting grooves (612) which are in one-to-one correspondence with the front inserting convex parts, and the front inserting convex parts are inserted into the corresponding front inserting grooves (612);

6. The transmission power take-off according to claim 2, wherein the stirring baffle comprises a front baffle plate (62), a connecting plate (63) and a rear baffle plate (64) which are sequentially arranged along the axial direction of the transmission shaft (1), wherein the front baffle plate (62), the rear baffle plate (64) and the connecting plate (63) are arc-shaped plates, and the inner diameters of the front baffle plate (62) and the rear baffle plate (64) are different;

the two ends of the front partition plate (62) are respectively connected with the fixing plate (61) and the connecting plate (63) in an inserting and abutting mode, and the two ends of the rear partition plate (64) are respectively connected with the connecting plate (63) and the inner wall of the shell in an inserting and abutting mode.

7. The transmission power take-off as claimed in claim 6, characterized in that the connection plate (63) is provided with a plurality of circumferentially spaced inner insertion grooves (631) and a plurality of circumferentially spaced outer insertion grooves (632), the inner insertion grooves (631) being located radially inward of the connection plate (63) of the outer insertion grooves (632);

the front partition plate (62) is provided with inner inserting convex parts which are in one-to-one correspondence with the inner inserting grooves (631) and are inserted, and the rear partition plate (64) is provided with outer inserting convex parts which are in one-to-one correspondence with the outer inserting grooves (632) and are inserted.

8. A gearbox power take-off according to any one of claims 1 to 7, wherein the clutch assembly (5) comprises:

a first tooth socket (51), the first tooth socket (51) being fixed to the reversing gear;

the clutch sleeve (52) is fixedly sleeved outside the transmission shaft (1), a clutch oil cavity (521) is formed in the clutch sleeve (52), and the clutch oil cavity (521) is connected with an oil supply assembly;

a clutch piston (53) and a second jaw sleeve (54), wherein the clutch piston (53) is fixedly connected with the second jaw sleeve (54), the clutch piston (53) is limited to rotate relative to the clutch sleeve (52), and the clutch piston (53) is slidably arranged in the clutch oil cavity (521) along the axial direction of the clutch sleeve (52) so as to enable the first jaw sleeve (51) and the second jaw sleeve (54) to be meshed or separated;

and the clutch elastic piece (55) is used for enabling the second tooth embedding sleeve (54) to have a movement trend away from the first tooth embedding sleeve (51) along the axial direction of the clutch sleeve (52).

9. The transmission power take-off of claim 8, wherein there are two of said reversing gears and the directions of rotation of the two reversing gears are opposite; the reversing gear, the clutch oil cavity (521), the first tooth-inserting sleeve (51), the second tooth-inserting sleeve (54) and the clutch elastic piece (55) are uniformly and correspondingly arranged;

the oil supply assembly is selectively communicable with at most one of the two clutch oil chambers (521).

10. Gearbox power take-off according to any of claims 1 to 7, characterised in that the transmission shaft (1) is fixedly sleeved with a bearing bush (4), the reversing gear is rotatably sleeved outside the bearing bush (4), the inner peripheral wall of the bearing bush (4) is provided with an inner annular oil groove (41), the outer peripheral wall of the bearing bush (4) is provided with an outer annular oil groove (42), the inner annular oil groove (41) is communicated with the outer annular oil groove (42) and the inner annular oil groove (41) is communicated with the lubricating oil duct (11) to form the lubricating oil cavity.