CN215634845U - Engine rear power takeoff and engine - Google Patents

Abstract

The utility model provides an engine rear power take-off device and an engine, comprising a shell unit, an input gear and a rear power take-off output shaft, wherein the shell unit comprises a shell and a sealing assembly; the first end and the input gear fixed connection of back power take off output shaft, the second end of back power take off output shaft has torque output portion, and torque output portion is used for output torque, and seal assembly sets up between shaft hole and back power take off output shaft, and is located the second end department of back power take off output shaft. The utility model has better sealing effect.

Description

Engine rear power takeoff and engine

Technical Field

The utility model relates to the technical field of engines, in particular to an engine rear power takeoff device and an engine.

Background

With the improvement of the requirements of the social and economic activities on the dynamic property, the economy, the adaptability and the like of the vehicle, the light weight, the safety and the applicability of the vehicle and parts thereof become a promotion direction which gets a great attention. The rear power takeoff device is widely applied to engineering machinery and agricultural machinery, and mainly has the main function of taking power from a vehicle chassis system and then transmitting the power to a vehicle oil pump system through a transmission shaft through self conversion. For example, a rotating mechanism of a transport tank of a concrete mixing transport vehicle, a harvesting mechanism of an agricultural machine and the like all need to provide power by taking power from behind.

The existing rear power take-off device outputs power to the outside to work, generally comprises parts such as a gear, a box body and a bearing, and is connected with an output shaft (or a gear) of an engine or a gearbox, wherein a rear power take-off gear shaft and the output shaft are connected by a spline and fixed by bolts.

However, in the rear power take-off device in the prior art, most of the rear power take-off devices have poor working conditions, and the rear power take-off output shaft has large vibration bounce, so that the rear power take-off device is easy to loosen and jump, and oil leakage of an oil seal and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an engine rear power take-off device and an engine, which have a good sealing effect.

The utility model provides a rear power take-off device of an engine, which comprises a shell unit, an input gear and a rear power take-off output shaft, wherein the shell unit comprises a shell and a sealing assembly, the shell is provided with shaft holes penetrating through two opposite sides of the shell, the rear power take-off output shaft is arranged in the shaft holes, and a first end and a second end of the rear power take-off output shaft are exposed to the outer side of the shell; the first end and the input gear fixed connection of back power take off output shaft, the second end of back power take off output shaft has torque output portion, and torque output portion is used for output torque, and seal assembly sets up between shaft hole and back power take off output shaft, and is located the second end department of back power take off output shaft. The rear power take-off device has the advantages that the rear power take-off device can vibrate in the working process of the engine, the vibration amplitude of the second end of the rear power take-off output shaft is large, the stability of connection between the second end of the rear power take-off output shaft and another structure is affected, the rear power take-off output shaft is easy to move, and the service life of the rear power take-off device is prolonged. The sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is located at the second end of the rear power take-off output shaft, the influence of the external environment on the rear power take-off output shaft can be effectively reduced, the service life of the rear power take-off output shaft is prolonged, meanwhile, the sealing assembly is far away from the first end of the rear power take-off output shaft, the problem that the sealing effect is not good due to the fact that the sealing assembly easily generates play is solved, and the sealing effect of the device is improved.

Get power device behind engine as above-mentioned, optional, back power take-off output shaft is including setting up the axis body in the shaft hole, and the axis body extends to the casing outside, and the axis body is the same at axial everywhere cross sectional shape. Specifically, the axis body sets up in the shaft hole, and extends to the casing outside, lies in between the first end and the second end of back power take-off output shaft, wherein, for better setting in the shaft hole, it is inseparabler to mutually support with the shaft hole, and the axis body is the same at cross sectional shape everywhere in the axial.

According to the engine rear power take-off device, optionally, the rear power take-off output shaft and the input gear are connected in an interference fit mode or in a spline fit mode. Specifically, the rear power take-off output shaft and the input gear are in interference fit, so that the combination area and the combination force can be increased, the rear power take-off output shaft and the output gear are tightly combined, and the rear power take-off output shaft and the output gear are firm and have high reliability and cannot loosen and fall off; or an involute spline is adopted between the rear power take-off output shaft and the input gear, so that the centering is good, the precision is high, and the stable operation is ensured. The two connection modes can increase the stability between the rear power take-off output shaft and the input gear, so that the rear power take-off output shaft and the input gear are connected into an integrated structure.

In the above-described engine rear power take-off, the torque output portion may be a flange. Specifically, when the power take-off device behind the engine works, the external engine can drive the input gear to rotate, the rear power take-off output shaft which is connected with the input gear into a whole also rotates along with the input gear, and then the rear power take-off torque is output again through the flange plate arranged at the second end of the rear power take-off output shaft.

As the above engine rear power take-off, optionally, the sealing assembly includes an oil seal, and the oil seal is located at one end of the shaft body close to the torque output part. Specifically, the oil blanket setting is between shaft hole and back power take-off output shaft, is located the one end that is close to the torque output portion of axis body, is located the second end department of back power take-off output shaft promptly, and the oil blanket has played fine effect to whole back power take-off sealing to prevent the oil leak, seal up the lubricating oil in the cavity of casing like this, prevent that lubricating oil from leaking to the outside, wherein the oil blanket is the skeleton oil blanket.

The engine rear power take-off device optionally further comprises a bearing, and the bearing is arranged between the rear power take-off output shaft and the inner wall of the shell. Specifically, the bearing sets up between the inner wall of back power take-off output shaft and casing, that is to say, back power take-off output shaft passes through the bearing and installs in the casing, can improve the reliability of back power take-off output shaft installation, moves steadily.

The rear power takeoff device for the engine optionally further comprises a circlip, the outer edge of the circlip abuts against the inner wall of the shaft hole, and the end face of the circlip abuts against the bearing. Specifically, the circlip is located the shaft hole, and its outer fringe and shaft hole inner wall butt, its terminal surface butt are on the outer lane of bearing for the fixed bearing for the axial positioning of bearing increases the pretightning force, prevents bearing axial displacement.

As the engine rear power take-off device, optionally, the bearing comprises a first bearing and a second bearing, and the first bearing and the second bearing are sequentially arranged between the first end and the second end of the rear power take-off output shaft at intervals. Specifically, the bearing includes first bearing and second bearing, and first bearing and second bearing interval set up in proper order between the first end of back power take-off output shaft and the second end, that is to say, in order to improve the reliability of back power take-off output shaft installation, back power take-off output shaft installs in the casing through two bearings, and wherein first bearing is located the first end department of back power take-off output shaft, and the second bearing is located the second end department of back power take-off output shaft.

The engine rear power take-off device optionally further comprises a spacer, wherein the spacer is arranged on the rear power take-off output shaft and is positioned between the input gear and the end face of the first bearing.

That is to say, the isolator is located the first end department of back power take-off output shaft, and is located between the terminal surface of input gear and first bearing, and wherein, the isolator is not totally in the casing, that is to say, the isolator is in the outside of casing at the first position that is close to the input gear, and the isolator is in the inboard of casing at the second position that is close to first bearing, guarantees that the input gear is connected and does not take place axial float on the back power take-off output shaft for the connection between input gear and the back power take-off output shaft is more firm.

The utility model provides an engine rear power take-off device, which comprises a shell unit, an input gear and a rear power take-off output shaft, wherein the shell unit comprises a shell and a sealing assembly, the shell is provided with shaft holes penetrating through two opposite sides of the shell, the rear power take-off output shaft is arranged in the shaft holes, and a first end and a second end of the rear power take-off output shaft are exposed to the outer side of the shell; the first end and the input gear fixed connection of back power take off output shaft, the second end of back power take off output shaft has torque output portion, and torque output portion is used for output torque, and seal assembly sets up between shaft hole and back power take off output shaft, and is located the second end department of back power take off output shaft. Specifically, the shell unit, the input gear and the rear power take-off output shaft are of independent structures, the rear power take-off output shaft penetrates through the whole shaft hole, the first end and the second end of the rear power take-off output shaft are exposed outside the shell, the first end of the rear power take-off output shaft and the input gear are fixedly connected into a whole, namely, the joint of the first end of the rear power take-off output shaft and the input gear is exposed outside the shell, the second end of the rear power take-off output shaft is provided with a torque output part, and the torque output part is connected with an external structure and used for outputting torque. The problem of behind the engine power take-off device can produce the vibration at the in-process of work, wherein the second end vibration range of back power take-off output shaft is big, has influenced the steadiness of being connected between the second end department of back power take-off output shaft and another structure, makes it produce the drunkenness easily is solved, has improved the life of device. The sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is located at the second end of the rear power take-off output shaft, the influence of the external environment on the rear power take-off output shaft can be effectively reduced, the service life of the rear power take-off output shaft is prolonged, meanwhile, the sealing assembly is far away from the first end of the rear power take-off output shaft, the problem that the sealing effect is not good due to the fact that the sealing assembly easily generates play is solved, and the sealing effect of the device is improved.

The utility model also provides an engine, which comprises the engine rear power take-off device. That is to say, this engine rear power take-off that engine includes has solved and can produce the vibration at the in-process of work, and wherein rear power take-off output shaft's second end vibration amplitude is big, has influenced the steadiness of being connected between rear power take-off output shaft's second end department and another structure, makes its problem that produces the drunkenness easily, has improved the life of device. The sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is located at the second end of the rear power take-off output shaft, the influence of the external environment on the rear power take-off output shaft can be effectively reduced, the service life of the rear power take-off output shaft is prolonged, meanwhile, the sealing assembly is far away from the first end of the rear power take-off output shaft, the problem that the sealing effect is not good due to the fact that the sealing assembly easily generates play is solved, and the sealing effect of the device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first view angle of an engine rear power take-off device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second perspective view of an engine rear power take-off device according to an embodiment of the present application.

Description of reference numerals:

100-an engine rear power take-off;

1-a housing unit;

11-a housing;

12-a sealing assembly;

121-oil seal;

2-an input gear;

3-rear power take-off output shaft;

31-torque output;

32-shaft body;

4-a bearing;

41-a first bearing;

42-a second bearing;

5-elastic retainer ring;

6-spacer ring;

7-spacers.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of the present invention, not full embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. All other embodiments obtained are within the scope of protection of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

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 utility model 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 utility model.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other in the inner cavities or the interaction relationship of the two components. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be noted that, in the description of the present invention, the terms "first", "second" and "third" are used merely for convenience in describing different cavity elements, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.

In the prior art, a rear power take-off device outputs power to the outside to work, generally comprises parts such as a gear, a box body and a bearing, and is connected with an output shaft (or a gear) of an engine or a gearbox, wherein a rear power take-off gear shaft and the output shaft are connected through a spline and fixed through bolts. However, most rear power take-off devices have poor working conditions, and the rear power take-off output shaft has large vibration and bounce, so that the rear power take-off is easy to loosen and move, and oil leakage of an oil seal is caused.

In order to overcome the defects in the prior art, the utility model provides the engine rear power take-off device and the engine, the first end of the rear power take-off output shaft is fixedly connected with the input gear, so that the problem that the rear power take-off device of the engine vibrates in the working process is solved, the vibration amplitude of the second end of the rear power take-off output shaft is large, the connection stability between the second end of the rear power take-off output shaft and another structure is influenced, the rear power take-off device is easy to move, and the service life of the device is prolonged. Through sealing assembly's setting, can effectually reduce external environment to the influence of back power take-off output shaft, prolong the life of back power take-off output shaft, simultaneously, sealing assembly keeps away from the setting of the first end of back power take-off output shaft, has solved because of producing the drunkenness easily and has brought the not good problem of sealed effect, has improved the sealed effect of device.

The present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can more clearly understand the contents of the present invention in detail.

Fig. 1 is a schematic structural diagram of an engine rear power take-off device provided in an embodiment of the present application, and fig. 2 is a schematic structural diagram of a second viewing angle of the engine rear power take-off device provided in the embodiment of the present application. As shown in fig. 1 and 2, the present embodiment provides an engine rear power take-off device 100, which includes a housing unit 1, an input gear 2, and a rear power take-off output shaft 3, wherein the housing unit 1 includes a housing 11 and a seal assembly 12, the housing 11 has shaft holes penetrating through two opposite sides of the housing 11, the rear power take-off output shaft 3 is disposed in the shaft holes, and a first end and a second end of the rear power take-off output shaft 3 are exposed to the outside of the housing 11; the first end of the rear power take-off output shaft 3 is fixedly connected with the input gear 2, the second end of the rear power take-off output shaft 3 is provided with a torque output part 31, the torque output part 31 is used for outputting torque, and the sealing assembly 12 is arranged between the shaft hole and the rear power take-off output shaft 3 and is positioned at the second end of the rear power take-off output shaft 3.

Specifically, the housing unit 1, the input gear 2 and the rear power take-off shaft 3 are of an independent structure, the rear power take-off shaft 3 penetrates through the whole shaft hole, and the first end and the second end of the rear power take-off shaft 3 are exposed outside the housing 11, wherein the first end of the rear power take-off shaft 3 and the input gear 2 are fixedly connected into a whole, that is, the joint of the first end of the rear power take-off shaft 3 and the input gear 2 is exposed outside the housing 11, and the second end of the rear power take-off shaft 3 is provided with a torque output part 31 which is connected with an external structure through the torque output part 31 and used for outputting torque. The problem of power take-off 100 can produce the vibration at the in-process of work behind the engine is solved, wherein the second end vibration range of back power take-off output shaft 3 is big, has influenced the steadiness of being connected between the second end department of back power take-off output shaft 3 and another structure, makes it produce the drunkenness easily is solved, has improved the life of device. Sealing assembly 12 sets up between shaft hole and back power take-off output shaft 3, and is located the second end department of back power take-off output shaft 3, can effectually reduce external environment to the influence of back power take-off output shaft 3, and the life of back power take-off output shaft 3 is prolonged, and simultaneously, sealing assembly 12 keeps away from the setting of the first end of back power take-off output shaft 3, has solved because of producing the drunkenness easily and has brought the not good problem of sealed effect, has improved the sealed effect of device.

In an alternative embodiment, the rear power take-off output shaft 3 includes a shaft body 32 disposed in the shaft hole, the shaft body 32 extends to the outside of the housing 11, and the cross-sectional shape of the shaft body 32 is the same at all positions in the axial direction. Specifically, the axis body 32 is disposed in the axial hole, and extends to the outside of the housing 11, and is located between the first end and the second end of the rear power take-off output shaft 3, wherein, for better disposition in the axial hole, the cross-sectional shape of the axis body 32 is the same at all positions in the axial direction, and the axis body is mutually matched with the axial hole more closely.

In an alternative embodiment, the rear power take-off shaft 3 and the input gear 2 are connected by an interference fit or by a spline fit. Specifically, the rear power take-off output shaft 3 and the input gear 2 are in interference fit, so that the combination area and the combination force can be increased, the rear power take-off output shaft 3 and the output gear are tightly combined, and the rear power take-off output shaft is firm and firm, has high reliability and cannot loosen and fall off; or an involute spline is adopted between the rear power take-off output shaft 3 and the input gear 2, so that the centering is good, the precision is high, and the stable operation is ensured. The two connection modes can increase the stability between the rear power take-off output shaft 3 and the input gear 2, so that the rear power take-off output shaft 3 and the input gear 2 are connected into an integrated structure.

In an alternative embodiment, the torque output 31 is a flange. Specifically, when the engine rear power take-off device 100 works, the external engine drives the input gear 2 to rotate, the rear power take-off output shaft 3 integrally connected with the input gear 2 also rotates, and then the rear power take-off torque is output again through the flange plate arranged at the second end of the rear power take-off output shaft 3.

In an alternative embodiment, the seal assembly 12 includes an oil seal 121, and the oil seal 121 is located at an end of the shaft body 32 near the torque output portion 31. Specifically, oil blanket 121 sets up between shaft hole and back power take-off output shaft 3, is located the one end that is close to torque output portion 31 of axis body 32, is located the second end department of back power take-off output shaft 3 promptly, and oil blanket 121 has played fine effect to whole back power take-off's sealed to prevent the oil leak, seal up the lubricating oil in the cavity of casing 11 like this, prevent that lubricating oil from leaking to the outside, wherein oil blanket 121 is skeleton oil blanket 121.

In an alternative embodiment, a bearing 4 is further included, and the bearing 4 is disposed between the rear power output shaft 3 and the inner wall of the housing 11. Specifically, as shown in fig. 1, the bearing 4 is disposed between the rear power take-off output shaft 3 and the inner wall of the housing 11, that is, the rear power take-off output shaft 3 is mounted in the housing 11 through the bearing 4, so that the mounting reliability of the rear power take-off output shaft 3 can be improved, and the movement is smooth.

In an alternative embodiment, the bearing further comprises a circlip 5, the outer edge of the circlip 5 abuts against the inner wall of the shaft hole, and the end face of the circlip 5 abuts against the bearing 4. Specifically, circlip 5 is located the shaft hole, and its outer fringe and shaft hole inner wall butt, its terminal surface butt are on bearing 4's outer lane for fixed bearing 4, the axial positioning for bearing 4 increases the pretightning force, prevents bearing 4 axial displacement.

In an alternative embodiment, the bearing 4 includes a first bearing 41 and a second bearing 42, and the first bearing 41 and the second bearing 42 are sequentially disposed at intervals between the first end and the second end of the rear power take-off output shaft 3. Specifically, the bearings 4 include a first bearing 41 and a second bearing 42, and the first bearing 41 and the second bearing 42 are sequentially disposed between the first end and the second end of the rear power take-off output shaft 3 at intervals, that is, in order to improve the reliability of the installation of the rear power take-off output shaft 3, the rear power take-off output shaft 3 is installed in the housing 11 through the two bearings 4, wherein the first bearing 41 is located at the first end of the rear power take-off output shaft 3, and the second bearing 42 is located at the second end of the rear power take-off output shaft 3.

That is, the spacer ring 6 is provided between the first bearing 41 and the second bearing, and the spacer ring 6 is installed between the rear power output shaft 3 and the inner wall of the housing 11 and is located between the first bearing 41 and the second bearing 42, that is, both end surfaces of the spacer ring 6 respectively abut against the inner ring thrust surface of the first bearing 41 and the inner ring thrust surface of the second bearing 42, thereby preventing the inner rings of the first bearing 41 and the second bearing 42 from axially moving.

In an alternative embodiment, a spacer 7 is further included, the spacer 7 being provided on the rear power take-off shaft 3, the spacer 7 being located between the input gear 2 and the end face of the first bearing 41.

That is, the spacer 7 is located at the first end of the rear power take-off output shaft 3 and between the input gear 2 and the end surface of the first bearing 41, wherein the spacer 7 is not completely inside the housing 11, that is, the spacer 7 is located outside the housing 11 at a first position close to the input gear 2, and the spacer 7 is located inside the housing 11 at a second position close to the first bearing 41, so as to ensure that the input gear 2 is connected to the rear power take-off output shaft 3 without axial play, and thus the connection between the input gear 2 and the rear power take-off output shaft 3 is more stable.

The rear power take-off device for the engine comprises a shell unit, an input gear and a rear power take-off shaft, wherein the shell unit comprises a shell and a sealing assembly, the shell is provided with shaft holes penetrating through two opposite sides of the shell, the rear power take-off shaft is arranged in the shaft holes, and a first end and a second end of the rear power take-off shaft are exposed to the outer side of the shell; the first end and the input gear fixed connection of back power take off output shaft, the second end of back power take off output shaft has torque output portion, and torque output portion is used for output torque, and seal assembly sets up between shaft hole and back power take off output shaft, and is located the second end department of back power take off output shaft.

Specifically, the shell unit, the input gear and the rear power take-off output shaft are of independent structures, the rear power take-off output shaft penetrates through the whole shaft hole, the first end and the second end of the rear power take-off output shaft are exposed outside the shell, the first end of the rear power take-off output shaft and the input gear are fixedly connected into a whole, namely, the joint of the first end of the rear power take-off output shaft and the input gear is exposed outside the shell, the second end of the rear power take-off output shaft is provided with a torque output part, and the torque output part is connected with an external structure and used for outputting torque. The problem of behind the engine power take-off device can produce the vibration at the in-process of work, wherein the second end vibration range of back power take-off output shaft is big, has influenced the steadiness of being connected between the second end department of back power take-off output shaft and another structure, makes it produce the drunkenness easily is solved, has improved the life of device. The sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is located at the second end of the rear power take-off output shaft, the influence of the external environment on the rear power take-off output shaft can be effectively reduced, the service life of the rear power take-off output shaft is prolonged, meanwhile, the sealing assembly is far away from the first end of the rear power take-off output shaft, the problem that the sealing effect is not good due to the fact that the sealing assembly easily generates play is solved, and the sealing effect of the device is improved.

The embodiment also provides an engine, which comprises the engine rear power take-off device 100. That is to say, this power take-off 100 behind engine in engine, solved power take-off 100 behind engine and can produced the vibration in the course of the work, wherein the second end vibration range of rear power take-off output shaft 3 is big, has influenced the steadiness of being connected between the second end department of rear power take-off output shaft 3 and another structure, makes its problem that produces the drunkenness easily, has improved the life of device.

The embodiment also provides an engine, which comprises the engine rear power take-off device. That is to say, this engine rear power take-off that engine includes has solved and can produce the vibration at the in-process of work, and wherein rear power take-off output shaft's second end vibration amplitude is big, has influenced the steadiness of being connected between rear power take-off output shaft's second end department and another structure, makes its problem that produces the drunkenness easily, has improved the life of device. The sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is located at the second end of the rear power take-off output shaft, the influence of the external environment on the rear power take-off output shaft can be effectively reduced, the service life of the rear power take-off output shaft is prolonged, meanwhile, the sealing assembly is far away from the first end of the rear power take-off output shaft, the problem that the sealing effect is not good due to the fact that the sealing assembly easily generates play is solved, and the sealing effect of the device is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can still be modified, or the technical features of the partial or full cavities therein can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The rear power take-off device of the engine is characterized by comprising a shell unit, an input gear and a rear power take-off output shaft, wherein the shell unit comprises a shell and a sealing assembly, the shell is provided with shaft holes penetrating through two opposite sides of the shell, the rear power take-off output shaft is arranged in the shaft holes, and a first end and a second end of the rear power take-off output shaft are exposed to the outer side of the shell; the first end of the rear power take-off output shaft is fixedly connected with the input gear, the second end of the rear power take-off output shaft is provided with a torque output part, the torque output part is used for outputting torque, and the sealing assembly is arranged between the shaft hole and the rear power take-off output shaft and is positioned at the second end of the rear power take-off output shaft.

2. The engine rear power take-off of claim 1, characterized in that the rear power take-off output shaft includes a shaft body disposed in the shaft hole, the shaft body extending to the outside of the housing, the shaft body being identical in cross-sectional shape everywhere in the axial direction.

3. The engine rear power take-off of claim 2, characterized in that the rear power take-off output shaft and the input gear are connected by an interference fit or by a spline fit.

4. The engine rear power take-off of claim 2 or 3, characterized in that the torque output is a flange.

5. The engine rear power take-off of claim 4, wherein the seal assembly includes an oil seal located at an end of the shaft body proximate the torque output.

6. The engine power take-off unit as defined in any one of claims 1 to 3, further comprising a bearing disposed between the power take-off output shaft and an inner wall of the housing.

7. The engine rear power take-off according to claim 6, further comprising a circlip, an outer edge of which abuts against an inner wall of the shaft hole of the housing, and an end surface of the circlip abutting against the bearing.

8. The engine rear power take-off of claim 7, wherein the bearing comprises a first bearing and a second bearing, the first bearing and the second bearing in turn being spaced apart between the first end and the second end of the rear power take-off output shaft.

9. The engine rear power take-off of claim 8, further comprising a spacer disposed on the rear power take-off shaft, the spacer being located between the input gear and the end face of the first bearing.

10. An engine comprising the engine rear power take-off of any one of claims 1 to 9.

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