Hydraulic transmission box and output structure thereof

Abstract

The utility model discloses a hydraulic transmission box and an output structure thereof. A first power take-off shaft and a second power take-off shaft are both in transmission connection with an input shaft. The KR shaft is in transmission connection with the input shaft through the KR clutch, the KV shaft is in transmission connection with the input shaft through the KV clutch, the fourth shaft is in transmission connection with the input shaft through the fourth clutch, the KR shaft is in transmission connection with the fourth shaft, the fourth shaft is in transmission connection with the first shaft, the fourth shaft is in transmission connection with the second shaft, and the first shaft is in transmission connection with the third shaft through the first clutch. The third shaft is in transmission connection with the second shaft through a third clutch, the second shaft is in transmission connection with the third shaft through a second clutch, and the third shaft is in transmission connection with the first output shaft; the two ends of the first output shaft are output ends, and one output end is in transmission connection with the second output shaft through a bridge disengaging structure. According to the scheme, the output shaft can carry out multi-gear forward and backward output, and the output direction is provided with the off-bridge structure, so that switching of normal four-wheel drive output or normal two-wheel drive output of the gearbox can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gearbox, especially to a hydraulic gearbox and output structure thereof. BACKGROUND

[0002] The engineering machinery gearbox for port usually adopts power shift gearbox of hydraulic transmission, at present, the gearbox adapted to 160-230 kilowatt engine power section is all hydraulic gearbox directly taking power from the pump wheel, driving the working pump of the whole vehicle to work, the working pump is double hydraulic pump, and the hydraulic gearbox four-wheel drive is directly outputted. When the working pump is double pump, the wheel base is lengthened, and the suspension is installed on the power taking port of the gearbox, the oil circuit of the whole vehicle is dense, and the space requirement is high; and the double pump requires more delicate work and efficient coordination, and has large energy consumption and high maintenance cost; at the same time, the gearbox four-wheel drive output does not meet the demand of green and efficient when the whole vehicle is in high gear walking, and the maneuverability is poor; in the process of the continuous development of the present technical level, people have higher and higher requirements for the functionality and economy of the transmission mechanism, for this kind of situation, the present power section hydraulic gearbox cannot meet the use requirements of high efficiency, energy saving, flexible installation and high economy. SUMMARY

[0003] In order to solve the problem that the multi-gear hydraulic gearbox can only be outputted in the four-wheel drive direct output mode in the prior art, resulting in poor maneuverability when the whole vehicle is in high gear walking, the purpose of the utility model is to provide an output structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an output structure comprises a gearbox part, a power taking part and a bridge disconnecting part; the gearbox part comprises an input shaft, a first shaft, a second shaft, a third shaft, a fourth shaft, a KV shaft, a KR shaft and a first output shaft which are installed on a gearbox body; the power taking part comprises a first power taking shaft and a second power taking shaft; the bridge disconnecting part comprises a second output shaft; the first power taking shaft and the second power taking shaft are in driving connection with the input shaft; the KR shaft is in driving connection with the input shaft through a KR clutch, the KV shaft is in driving connection with the input shaft through a KV clutch, the fourth shaft is in driving connection with the input shaft through a fourth clutch, the KR shaft and the fourth shaft are in driving connection, the fourth shaft and the first shaft are in driving connection, the fourth shaft and the second shaft are in driving connection, the first shaft is in driving connection with the third shaft through a first clutch, the third shaft is in driving connection with the second shaft through a third clutch, the second shaft is in driving connection with the third shaft through a second clutch, and the third shaft and the first output shaft are in driving connection; both ends of the first output shaft are output ends, and one of the output ends is in driving connection with the second output shaft through a bridge disconnecting structure.

[0005] As preferred, the power take-off box is fixed on the gearbox body, the first power take-off shaft, the second power take-off shaft and the transmission shaft are rotatably installed in the power take-off box, the first power take-off shaft is in transmission connection with the transmission shaft, the second power take-off shaft is in transmission connection with the transmission shaft, one end of the transmission shaft extends out of the power take-off box, and the other end of the transmission shaft is inserted into the input shaft and is in spline connection.

[0006] As preferred, the power take-off box comprises a power take-off base and a power take-off end cover, the power take-off base and the power take-off end cover are fixedly connected, the power take-off base is fixedly connected with the gearbox body, the two ends of the first power take-off shaft are rotatably connected with the power take-off base and the power take-off end cover through bearings respectively, the two ends of the second power take-off shaft are rotatably connected with the power take-off base and the power take-off end cover through bearings respectively, and the two ends of the transmission shaft are rotatably connected with the power take-off base and the power take-off end cover through bearings respectively; the KV shaft and the KR shaft are both provided with an inner oil hole, the power take-off base is provided with a lubricating oil hole, the lubricating oil hole is in communication with the inner oil hole, and part of the cooling lubricating oil flowing through the KV clutch and the KR clutch enters the power take-off box through the inner oil hole and the lubricating oil hole.

[0007] As preferred, the lubricating oil hole is arranged at the position where the bearing is installed on the power take-off base, and the oil in the lubricating oil hole can flow through the bearing installed on the power take-off base.

[0008] As preferred, the power take-off base is provided with a plurality of first oil collecting grooves, and the plurality of first oil collecting grooves are arranged at the positions where the bearings are installed on the power take-off base; the power take-off end cover is provided with a plurality of second oil collecting grooves, and the plurality of second oil collecting grooves are arranged at the positions where the bearings are installed on the power take-off end cover.

[0009] As preferred, the first power take-off shaft, the second power take-off shaft and the transmission shaft are all gear shafts, the power take-off box is provided with an oil pool, part of the transmission shaft is immersed in the oil pool, and the transmission shaft can stir the oil in the oil pool.

[0010] As preferred, the power take-off base is provided with a first oil return hole, the gearbox body and the power take-off box are in communication through the first oil return hole, and the oil in the power take-off box can enter the gearbox body through the first oil return hole.

[0011] As preferred, the gear sleeve is sleeved on the second output shaft, the gear sleeve is in spline connection and sliding fit with the second output shaft, the first output shaft is fixed with a spline seat, the gear sleeve is in plug-in connection and spline fit with the spline seat; when the gear sleeve moves to the two-wheel drive working position, the gear sleeve is separated from the first output shaft, and the power of the gearbox is only output from the first output shaft; when the gear sleeve moves to the four-wheel drive working position, the gear sleeve is engaged with the spline seat, and the power of the gearbox is output from the first output shaft and the second output shaft.

[0012] As preferred, the shift fork is slidably installed on the gearbox body, the shift fork is connected with the gear sleeve, and the shift fork can drive the gear sleeve to move when the shift fork moves.

[0013] A hydraulic gearbox comprises the output structure.

[0014] The beneficial effects of the technical solution of the present invention are as follows: in the above solution, the output shaft can perform multi-gear forward and reverse output, and the disengaging bridge structure is set in the output direction to realize the switching of the gearbox between normal four-wheel drive output and normal two-wheel drive output. In this way, the whole vehicle using the above gearbox can freely change the drive output mode according to the actual working conditions, thereby meeting the requirements of green and high efficiency and improving the maneuverability of the whole vehicle; during the operation of the gearbox, the two power take-off ports of the gearbox always maintain output. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the transmission principle diagram of the gearbox;

[0016] Figure 2 Schematic diagram of the connection structure of the gearbox body, input shaft, KR shaft, KV shaft and power take-off part;

[0017] Figure 3 It is a schematic diagram of the connection structure of the decoupling structure, the first output shaft and the second output shaft;

[0018] Figure 4 It is a structural diagram of the power take-off base;

[0019] Figure 5 This is a structural diagram of the power take-off end cover.

[0020] Figure numerals: 1, torque converter; 2, input shaft; 3, input shaft; 4, KR shaft; 5, KR clutch; 6, KV shaft; 7, KV clutch; 8, input shaft; 9, first clutch; 10, second shaft; 11, second clutch; 12, third shaft; 13, third clutch; 14, fourth shaft; 15, fourth clutch; 16, transmission shaft; 17, first power take-off shaft; 18, second power take-off shaft; 19, first output shaft; 20, gearbox body; 21, power take-off base; 22, power take-off end cover; 23, lubricating oil hole; 24, decoupled axle housing; 25, piston seat; 26, decoupled axle end cover; 27, gear sleeve; 28, second output shaft; 29, shift fork; 30, fork shaft; 31, piston; 32, signal switch. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0024] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Example

[0026] like Figures 1-5The output structure of a hydraulic gearbox includes a gearbox part, a power take-off part and a bridge disconnecting part; the gearbox part includes an input shaft 3, a first shaft 8, a second shaft 10, a third shaft 12, a fourth shaft 14, a KV shaft 6, a KR shaft 4 and a first output shaft 19 which are installed on a gearbox body 20; the power take-off part includes a first power take-off shaft 17 and a second power take-off shaft 18; the bridge disconnecting part includes a second output shaft 28;

[0027] The first power take-off shaft 17 and the second power take-off shaft 18 are both in driving connection with the input shaft 3; the KR shaft 4 is in driving connection with the input shaft 3 through a KR clutch 5, the KV shaft 6 is in driving connection with the input shaft 3 through a KV clutch 7, the fourth shaft 14 is in driving connection with the input shaft 3 through a fourth clutch 15, the KR shaft 4 is in driving connection with the fourth shaft 14, the fourth shaft 14 is in driving connection with the first shaft 8, the fourth shaft 14 is in driving connection with the second shaft 10, the first shaft 8 is in driving connection with the third shaft 12 through a first clutch 9, the third shaft 12 is in driving connection with the second shaft 10 through a third clutch 13, the second shaft 10 is in driving connection with the third shaft 12 through a second clutch 11, and the third shaft 12 is in driving connection with the first output shaft 19.

[0028] Both ends of the first output shaft 19 are output ends, one of which is in driving connection with the second output shaft 28 through a bridge disconnecting structure.

[0029] In this way, in the above scheme, the output shaft can perform multi-gear forward and reverse output, and the bridge disconnecting structure arranged at the output end can realize the switching of the gearbox between the four-wheel drive output and the two-wheel drive output; during the operation of the gearbox, the two power take-off ports of the gearbox always maintain output.

[0030] In this embodiment, a power take-off box body is fixed on the gearbox body 20, the first power take-off shaft 17, the second power take-off shaft 18 and a transmission shaft 16 are all rotatably installed in the power take-off box body, the first power take-off shaft 17 is in driving connection with the transmission shaft 16, the second power take-off shaft 18 is in driving connection with the transmission shaft 16, one end of the transmission shaft 16 extends out of the power take-off box body, and the other end of the transmission shaft 16 is inserted into the input shaft 3 and is in spline connection.

[0031] Further preferably, the power take-off box body comprises a power take-off base 21 and a power take-off end cover 22, the power take-off base 21 and the power take-off end cover 22 are fixedly connected, the power take-off base 21 and the gearbox body 20 are fixedly connected, the two ends of the first power take-off shaft 17 are rotatably connected to the power take-off base 21 and the power take-off end cover 22 through bearings respectively, the two ends of the second power take-off shaft 18 are rotatably connected to the power take-off base 21 and the power take-off end cover 22 through bearings respectively, and the two ends of the transmission shaft 16 are rotatably connected to the power take-off base 21 and the power take-off end cover 22 through bearings respectively; the KV shaft 6 and the KR shaft 4 are both provided with an inner oil hole, the power take-off base 21 is provided with a lubricating oil hole 23, the lubricating oil hole 23 is in communication with the inner oil hole, and part of the cooling lubricating oil flowing through the KV clutch 7 and the KR clutch 5 enters the power take-off box body through the inner oil hole and the lubricating oil hole 23.

[0032] Further preferably, the lubricating oil hole 23 is arranged at a position where a bearing is arranged on the power take-off base 21, and the oil in the lubricating oil hole 23 can flow through the bearing arranged on the power take-off base 21.

[0033] In the embodiment, the first power take-off shaft 17, the second power take-off shaft 18 and the transmission shaft 16 are all gear shafts, an oil pool is arranged in the power take-off box body, part of the transmission shaft 16 is immersed in the oil pool, and the transmission shaft 16 can stir the oil in the oil pool; the power take-off base 21 is provided with a plurality of first oil collecting grooves 21a, and the plurality of first oil collecting grooves 21a are arranged at positions where bearings are arranged on the power take-off base 21; the power take-off end cover 22 is provided with a plurality of second oil collecting grooves 22a, and the plurality of second oil collecting grooves 22a are arranged at positions where bearings are arranged on the power take-off end cover 22. In this way, the oil can fully lubricate the bearings and take away heat, and finally flow into the inner cavity of the power take-off box body. Since part of the structure is immersed in the oil stored in the power take-off box body, the transmission shaft 16 is rotated to stir and throw the oil, part of the oil is collected in the oil collecting grooves on the power take-off base 21 and the oil collecting grooves on the power take-off end cover 22, and the oil in the oil collecting grooves flows through the bearings under the action of gravity, so that the oil lubricates the bearings and takes away heat.

[0034] Further preferably, the power take-off base 21 is provided with a first oil return hole 22b, the gearbox body 20 and the power take-off box body are in communication through the first oil return hole 22b, and the oil in the power take-off box body can enter the gearbox body 20 through the first oil return hole 22b. In this way, the oil in the power take-off box body is used for lubrication at the same time, and the excess lubricating oil returns to the hydraulic gearbox body 20 through the first oil return hole 22b on the power take-off base 21, so as to ensure that the lubricating oil in the power take-off box body is continuously circulated and cooled.

[0035] In the embodiment, the intermediate shaft 2 is sleeved on the input shaft 3, the input shaft 3 and the intermediate shaft 2 are spline-coupled, the KR shaft 4 is in transmission connection with the intermediate shaft 2 through the KR clutch 5, the KV shaft 6 is in transmission connection with the intermediate shaft 2 through the KV clutch 7, and the torque converter 1 is connected with the intermediate shaft 2; the inner hole of the intermediate shaft 2 is in communication with the oil cavity of the torque converter 1, the transmission shaft 16 and the input shaft 3 cooperate to form a lubricating oil cavity, the input shaft 3 is provided with an oil passing hole in communication with the lubricating oil cavity and the inner hole of the intermediate shaft 2, and the transmission shaft 16 is provided with a through hole in communication with the lubricating oil cavity. In this way, the oil in the torque converter can pass through the gap between the input shaft and the intermediate shaft, then pass through the oil passing hole into the lubricating oil cavity, and then the oil in the lubricating oil cavity can lubricate the bearing installed at one end of the transmission shaft 16 through the spline side gap between the transmission shaft 16 and the input shaft 3, and the oil in the lubricating oil cavity can lubricate the bearing installed at the other end of the transmission shaft 16 through the through hole.

[0036] In order to facilitate the realization of the bridge, in the embodiment, the tooth sleeve 27 is sleeved on the second output shaft 28, the tooth sleeve 27 is spline-coupled and slidingly fitted with the second output shaft 28, the first output shaft 19 is fixed with a spline seat, the tooth sleeve 27 is plug-connected and spline-fitted with the spline seat; when the tooth sleeve 27 moves to the two-drive working position, the tooth sleeve 27 is disengaged from the first output shaft 19, and the power of the gearbox is only output from the first output shaft 19; when the tooth sleeve 27 moves to the four-drive working position, the tooth sleeve 27 is engaged with the spline seat, and the power of the gearbox is output from the first output shaft 19 and the second output shaft 28.

[0037] Further preferably, the second output shaft 28 is provided with a positioning groove, a limiting spring and a limiting steel ball are arranged in the positioning groove, the limiting spring can push the limiting steel ball out of the positioning groove; a first limiting groove and a second limiting groove are arranged on the inner wall of the tooth sleeve 27, when the tooth sleeve 27 moves to the two-drive working position, the limiting spring pushes the limiting steel ball into the first limiting groove; when the tooth sleeve 27 moves to the four-drive working position, the limiting spring pushes the limiting steel ball into the second limiting groove.

[0038] In the embodiment, the shift fork 29 is slidingly installed on the gearbox body 20, the shift fork 29 is connected with the tooth sleeve 27, and the shift fork 29 can drive the tooth sleeve 27 to move when the shift fork 29 moves.

[0039] Further preferably, the gearbox body 20 is fixed with a take-off bridge base 23, the take-off bridge base 23 is fixed with a take-off bridge shell 24, the take-off bridge base 23 and the take-off bridge shell 24 cooperate to form a take-off bridge space, one end of the first output shaft 19 extends into the take-off bridge space, one end of the second output shaft 28 extends into the take-off bridge space, the second output shaft 28 is installed with an output flange at the other end, the second output shaft 28 is rotatably installed on the take-off bridge shell 24 through the first shaft bearing 8, the gear sleeve 27 and the shift fork 29 are arranged in the take-off bridge space; the take-off bridge shell 24 is fixed with a piston seat 25, the piston seat 25 is fixed with a take-off bridge end cover 26, the take-off bridge end cover 26 and the piston seat 25 cooperate to form a driving space, the piston 31 is slidably installed in the driving space, the piston 31 is installed with a fork shaft 30, one end of the fork shaft 30 extends into the take-off bridge space, the fork shaft 30 is in sliding cooperation with the piston seat 25, one end of the shift fork 29 is installed on the fork shaft 30, the other end of the shift fork 29 is connected with the gear sleeve 27, the fork shaft 30 can drive the shift fork 29 to engage or disengage the gear sleeve 27 with the first output shaft 19 when the fork shaft 30 moves.

[0040] Further preferably, one end of the fork shaft 30 is a threaded connection end, the fork shaft 30 is threadedly connected with the piston 31, the threaded connection end of the fork shaft 30 penetrates through the piston 31 and is threadedly connected with a locking nut, the fork shaft 30 is fixed on the piston 31 by screwing the locking nut.

[0041] Further preferably, the piston 31 divides the driving space into a first working chamber and a second working chamber, the first working chamber is installed with a driving spring, the driving spring can drive the piston 31 to engage the gear ring with the first output shaft 19; the piston seat 25 is provided with an oil hole communicating with the second working chamber, the oil in the second working chamber can drive the piston 31 to disengage the gear ring from the first output shaft 19.

[0042] Further preferably, the take-off bridge base 23 is provided with a positioning hole, one end of the fork shaft 30 extends into the positioning hole and is in sliding cooperation.

[0043] In this embodiment, the take-off bridge end cover 26 is installed with a signal switch 32 for controlling the piston 31, the whole vehicle control system is electrically connected with the signal switch 32.

[0044] In the embodiment, the intermediate shaft 2, the first shaft 8, the second clutch 11 shaft, the third shaft 12, the fourth shaft 14, the KR shaft 4, the KV shaft 6 and the output shaft are gear shafts. The KR shaft 4 is in meshing transmission with the gear part on the intermediate shaft 2 through the KR clutch 5, the fourth shaft 14 is in meshing transmission with the gear part on the intermediate shaft 2 through the fourth clutch 15, the KV shaft 6 is in meshing transmission with the gear part on the intermediate shaft 2 through the KV clutch 7, the gear part of the KR shaft 4 is in meshing transmission with the gear part of the fourth shaft 14, the gear part on the fourth shaft 14 is in meshing transmission with the gear part on the first shaft 8, the first shaft 8 is in meshing transmission with the gear part on the third shaft 12 through the first clutch 9, the gear part on the fourth shaft 14 is in meshing transmission with the gear part on the second shaft 10, and the third shaft 12 is in meshing transmission with the gear part on the second shaft 10 through the third clutch 13.

[0045] A hydraulic transmission gearbox comprising the output structure.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application without departing from the principles and spirits of the present application.

Claims

1. An output structure, characterized in that: It includes a gearbox part, a power take-off part and a decoupling part; the gearbox part includes an input shaft (3), a first shaft (8), a second shaft (10), a third shaft (12), a fourth shaft (14), a KV shaft (6), a KR shaft (4) and a first output shaft (19) installed on a gearbox body (20); the power take-off part includes a first power take-off shaft (17) and a second power take-off shaft (18); and the decoupling part includes a second output shaft (28); The first power take-off shaft (17) and the second power take-off shaft (18) are both connected to the input shaft (3); the KR shaft (4) is connected to the input shaft (3) through the KR clutch (5); the KV shaft (6) is connected to the input shaft (3) through the KV clutch (7); the fourth shaft (14) is connected to the input shaft (3) through the fourth clutch (15); the KR shaft (4) is connected to the fourth shaft (14); the fourth shaft (14) is connected to the first shaft (8); the fourth shaft (14) is connected to the second shaft (10); the first shaft (8) is connected to the third shaft (12) through the first clutch (9); the third shaft (12) is connected to the second shaft (10) through the third clutch (13); the second shaft (10) is connected to the third shaft (12) through the second clutch (11); and the third shaft (12) is connected to the first output shaft (19); Both ends of the first output shaft (19) are output ends, and one of the output ends is transmission-connected to the second output shaft (28) via a decoupling structure.

2. An output structure according to claim 1, characterized in that: A power take-off housing is fixed on the gearbox housing (20), and a first power take-off shaft (17), a second power take-off shaft (18) and a transmission shaft (16) are all rotatably mounted in the power take-off housing. The first power take-off shaft (17) is in transmission connection with the transmission shaft (16), and the second power take-off shaft (18) is in transmission connection with the transmission shaft. One end of the transmission shaft (16) extends from the power take-off housing, and one end of the transmission shaft (16) is inserted into the input shaft (3) and is spline-connected.

3. An output structure according to claim 2, characterized in that: The power take-off box body includes a power take-off base (21) and a power take-off end cover (22), the power take-off base (21) and the power take-off end cover (22) are fixedly connected, the power take-off base (21) and the gearbox body (20) are fixedly connected, the two ends of the first power take-off shaft (17) are respectively rotatably connected to the power take-off base (21) and the power take-off end cover (22) through bearings, the two ends of the second power take-off shaft (18) are respectively rotatably connected to the power take-off base (21) and the power take-off end cover (22) through bearings, and the two ends of the transmission shaft (16) are respectively rotatably connected to the power take-off base (21) and the power take-off end cover (22) through bearings; the KV shaft (6) and the KR shaft (4) are both provided with inner oil holes, the power take-off base (21) is provided with a lubricating oil hole (23), the lubricating oil hole (23) is communicated with the inner oil hole, and part of the cooling lubricating oil flowing through the KV clutch (7) and the KR clutch (5) enters the power take-off box body through the inner oil hole and the lubricating oil hole (23).

4. An output structure according to claim 3, characterized in that: The lubricating oil hole (23) is provided at a position on the power take-off base (21) where the bearing is mounted, and the oil in the lubricating oil hole (23) can flow through the bearing mounted on the power take-off base (21).

5. An output structure according to claim 4, characterized in that: A plurality of first oil collecting grooves (21a) are provided on the power take-off base (21), and the plurality of first oil collecting grooves (21a) are respectively provided at positions where bearings are installed on the power take-off base (21); a plurality of second oil collecting grooves (22a) are provided on the power take-off end cover (22), and the plurality of second oil collecting grooves (22a) are respectively provided at positions where bearings are installed on the power take-off end cover (22).

6. The output structure according to claim 2, characterized in that: The first power take-off shaft (17), the second power take-off shaft (18) and the transmission shaft (16) are all gear shafts. An oil pool is provided in the power take-off housing, and part of the transmission shaft (16) is immersed in the oil pool. The transmission shaft (16) can stir the oil in the oil pool.

7. The output structure according to claim 2, characterized in that: A first oil return hole (22b) is provided on the power take-off base (21); the transmission case (20) and the power take-off case are connected via the first oil return hole (22b); and the oil in the power take-off case can enter the transmission case (20) via the first oil return hole (22b).

8. The output structure according to claim 1, characterized in that: The gear sleeve (27) is sleeved on the second output shaft (28), the gear sleeve (27) and the second output shaft (28) are spline-connected and slidingly matched, the first output shaft (19) is fixed with a spline seat, the gear sleeve (27) and the spline seat are plug-in connected and spline-matched; when the gear sleeve (27) moves to the two-wheel drive working position, the gear sleeve (27) is disengaged from the first output shaft (19), and the power of the gearbox is output only from the first output shaft (19); when the gear sleeve (27) moves to the four-wheel drive working position, the gear sleeve (27) is engaged with the spline seat, and the power of the gearbox is output from the first output shaft (19) and the second output shaft (28).

9. An output structure according to claim 8, characterized in that: The shift fork (29) is slidably mounted on the transmission case (20), and the shift fork (29) is connected to the gear sleeve (27). When the shift fork (29) moves, it can drive the gear sleeve (27) to move.

10. A hydraulic transmission, characterized in that: The invention comprises an output structure according to any one of claims 1 to 9.

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