Hydraulic transmission with pto

Abstract

The utility model discloses a kind of hydraulic transmission gearbox with PTO, including box and the PTO output gear wheel being set in box, PTO intermediate shaft gear, hydraulic torque converter, PTO input gear wheel, turbine shaft, oil pump, forward clutch, one clutch, two clutches, three clutches, reverse clutch and high-speed clutch, PTO output gear wheel includes first PTO output gear wheel and second PTO output gear wheel.The utility model provides a kind of hydraulic transmission gearbox for double PTO output hydraulic transmission gearbox, through the unique structure design, realize two independent power outputs, to meet the different device to the demand of power diversification, improve the working efficiency and applicability of equipment, adapt to more complex vehicle type.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a hydraulic gearbox with PTO. Background Technology

[0002] With the development of my country's logistics economy, forklifts are being used more widely, and the design and manufacturing of forklift transmission components are gradually maturing. The requirements for the transmission in forklifts are also constantly increasing, and the integration of the transmission is improving. In previous structures, the transmission had one or no PTO (Power Take-Off), and the vehicle used a transfer case to add a power take-off port. This resulted in a complex structure and high cost.

[0003] Referring to Chinese patent publication CN219796028U, entitled "A PTO Structure and Transmission," the PTO structure in this transmission includes a PTO housing, a clutch assembly housed within the PTO housing, and a first gear engaged on the side of the clutch assembly away from the PTO housing. An input shaft passes through the first gear and connects to the clutch assembly. The first gear meshes with a second gear, which connects to a power output assembly. A brake lever is positioned between the power output assembly and the clutch assembly, with one end of the brake lever near the PTO housing and the other end abutting against the second gear. A spring is fitted onto the brake lever. An internal oil passage is built into the PTO housing and connects to the brake lever. This transmission with only one PTO cannot meet various operating conditions, requiring a transfer case to add a power take-off port. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a hydraulic transmission with PTO, which can meet the power requirements under various working conditions through a dual PTO output design.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydraulic transmission with PTO includes a housing and a PTO output gear, a PTO intermediate shaft gear, a hydraulic torque converter, a PTO input gear, a turbine shaft, a forward clutch, a first gear clutch, a second gear clutch, a third gear clutch, a reverse clutch, and a high-speed clutch disposed in the housing. The PTO output gear includes a first PTO output gear and a second PTO output gear.

[0007] The turbine shaft is connected to the hydraulic torque converter, the PTO input gear is connected to the hydraulic torque converter, the PTO intermediate shaft gear meshes with the PTO input gear, the PTO intermediate shaft gear is connected to the oil pump, and the PTO intermediate shaft gear meshes with the first PTO output gear and the second PTO output gear respectively. The first PTO output gear and the second PTO output gear are respectively located on both sides of the PTO intermediate shaft gear.

[0008] The forward clutch, first gear clutch, second gear clutch, third gear clutch, reverse clutch, and high-speed clutch are located below the turbine shaft.

[0009] In some embodiments, the oil pump is located on the side of the PTO intermediate shaft gear closer to the forward clutch, and the torque converter is located on the other side of the PTO intermediate shaft gear away from the forward clutch.

[0010] In some embodiments, the system further includes a first-gear driveshaft gear, an output flange, an idler gear, a forward clutch comprising a forward clutch gear and a forward clutch hub gear, a reverse clutch comprising a reverse clutch gear and a reverse / second-gear clutch hub gear, a high-speed clutch comprising a high-speed / third-gear clutch gear and a third-gear clutch hub gear, a first-gear clutch comprising a first-gear clutch gear and a first-gear clutch hub gear, a second-gear clutch comprising a reverse / second-gear clutch hub gear and a first-gear clutch hub gear, and a third-gear clutch comprising a third-gear clutch hub gear and an output gear. The forward clutch gear meshes with the turbine shaft for transmission, and the turbine shaft is connected to the torque converter. The transmission connection consists of a forward clutch gear and a forward clutch hub gear, which are combined via friction plate assemblies to form a forward clutch. When the forward clutch is engaged, the forward clutch gear and the forward clutch hub gear are locked and rotate synchronously. The reverse clutch gear meshes with the turbine shaft for transmission. The reverse clutch gear and the reverse / second gear clutch hub gear are combined via friction plate assemblies to form a reverse clutch. When the reverse clutch is engaged, the reverse clutch gear and the reverse / second gear clutch hub gear are locked and rotate synchronously. The forward clutch hub gear meshes with the reverse / second gear clutch hub gear for transmission. The high-speed / third gear clutch gear meshes with the third gear clutch hub gear. Gears are assembled via friction plate assemblies to form a high-speed clutch. When the high-speed clutch is engaged, the high-speed / third-gear clutch gear and the third-gear clutch hub gear are engaged and rotate synchronously. The high-speed / third-gear clutch gear meshes with the idler gear, which in turn meshes with the forward clutch gear. The first-gear drive shaft gear is fixedly connected to the forward clutch hub gear and rotates synchronously. The first-gear clutch gear meshes with the first-gear drive shaft gear, and the first-gear clutch gear and the first-gear clutch hub gear are assembled via friction plate assemblies to form a first-gear clutch. When the first-gear clutch is engaged, the first-gear clutch gear and the first-gear clutch hub gear are engaged and rotate synchronously. The clutch hub gear meshes with the output gear for transmission, and the output gear is fixedly connected to the output flange outside the housing for synchronous rotation. The reverse / second gear clutch hub gear and the first gear clutch hub gear are combined through a friction plate assembly to form a second gear clutch. When the second gear clutch is engaged, the reverse / second gear clutch hub gear and the first gear clutch hub gear are engaged and fixed for synchronous rotation. The reverse / second gear clutch hub gear meshes with the third gear clutch hub gear for transmission, and the third gear clutch hub gear and the output gear are combined through a friction plate assembly to form a third gear clutch. When the third gear clutch is engaged, the third gear clutch hub gear and the output gear are engaged and fixed for synchronous rotation.

[0011] In some embodiments, the PTO input gear is mounted on the turbine shaft via bearings and can rotate independently; the reverse clutch gear is mounted on one side of the reverse / second gear clutch hub gear shaft via bearings and can rotate independently; a sleeve A is loosely fitted on the other side of the reverse / second gear clutch hub gear shaft, the inner friction plate of the second gear clutch is mounted on the sleeve A, and both are circumferentially fixed and rotate synchronously; the sleeve A is fixedly connected to one end of the first gear clutch hub gear shaft, and this end of the first gear clutch hub gear shaft is mounted on the reverse / second gear clutch hub gear shaft via bearings, allowing both to rotate independently. Furthermore, one end of the shaft of the first gear clutch hub gear is supported by a bearing and installed in the housing. The first gear clutch gear is sleeved on the shaft of the first gear clutch hub gear through the bearing, so that it can rotate independently. A shaft sleeve B is loosely fitted on the shaft of the third gear clutch hub gear. The inner friction plate of the third gear clutch is sleeved on the shaft sleeve B, and the two are fixed in the circumference and rotate synchronously. The shaft sleeve B is fixedly connected to one end of the shaft of the output gear. This end of the shaft of the output gear is sleeved on the shaft of the third gear clutch hub gear through a bearing, so that the two can rotate independently. Furthermore, this end of the shaft of the output gear is supported by a bearing and installed in the housing.

[0012] In some embodiments, the forward clutch, reverse clutch, and high-speed clutch are arranged sequentially from top to bottom below the turbine shaft, the first gear drive shaft is arranged on the side of the forward clutch away from the hydraulic torque converter, the first gear clutch and the output gear are arranged sequentially from top to bottom below the first gear drive shaft, the second gear clutch is arranged between the first gear clutch and the reverse clutch, the third gear clutch is arranged below the second gear clutch, the idler gear is arranged below the high-speed clutch, and the output flange is arranged on the side of the output gear away from the third gear clutch.

[0013] This utility model has the following beneficial effects:

[0014] The hydraulic transmission provided by this utility model is a dual PTO output hydraulic transmission. It outputs accessory power from the hydraulic torque converter of the transmission through gear transmission, thereby eliminating and simplifying the engine structure, realizing two independent power outputs to meet the diverse power needs of different devices, improving the working efficiency and applicability of the equipment, adapting to more complex vehicle models, optimizing the internal design to reduce the need for additional distribution devices, reducing system complexity and cost. Attached Figure Description

[0015] Figure 1 This is a perspective view of a hydraulic transmission with PTO in an embodiment of the present invention;

[0016] Figure 2 This is a second-view perspective perspective view of the hydraulic transmission with PTO in an embodiment of this utility model;

[0017] Figure 3This is a third-person perspective view of the hydraulic transmission with PTO in an embodiment of the present invention.

[0018] Figure 4 This is a cross-sectional view of the hydraulic transmission with PTO in an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. PTO output gear; 101. First PTO output gear; 102. Second PTO output gear; 2. PTO intermediate shaft gear; 3. Hydraulic torque converter; 4. PTO input gear; 5. Turbine shaft; 7. First gear drive shaft gear; 15. Output flange; 16. Output gear; 17. Idler gear; 211. Working oil pump; 212. Lubricating oil pump. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of this utility model.

[0022] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be used for fixing, coupling, or communication.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] refer to Figures 1-4The hydraulic transmission with PTO in this embodiment includes a housing and a PTO output gear 1, a PTO intermediate shaft gear 2, a hydraulic torque converter 3, a PTO input gear 4, a turbine shaft 5, a forward clutch KF, a first gear clutch K1, a second gear clutch K2, a third gear clutch K3, a reverse clutch KR, and a high-speed clutch KFH disposed in the housing. The PTO output gear 1 includes a first PTO output gear 101 and a second PTO output gear 102.

[0026] The turbine shaft 5 is driven by the hydraulic torque converter 3, the PTO input gear 4 is driven by the hydraulic torque converter 3, the PTO intermediate shaft gear 2 meshes with the PTO input gear 4, the PTO intermediate shaft gear 2 is connected to the oil pump, and the PTO intermediate shaft gear 2 meshes with the first PTO output gear 101 and the second PTO output gear 102 respectively. The first PTO output gear 101 and the second PTO output gear 102 are respectively located on both sides of the PTO intermediate shaft gear 2.

[0027] The forward clutch KF, first gear clutch K1, second gear clutch K2, third gear clutch K3, reverse clutch KR, and high-speed clutch KFH are located below the turbine shaft 5.

[0028] In this embodiment and some other embodiments, the oil pump is located on the side of the PTO intermediate shaft gear 2 near the forward clutch, and the hydraulic torque converter 3 is located on the other side of the PTO intermediate shaft gear 2 away from the forward clutch. In this embodiment, the oil pump includes a working oil pump 211 and a lubricating oil pump 212, both of which are connected to the PTO intermediate shaft gear 2.

[0029] In this embodiment and some other embodiments, it also includes a first-gear drive shaft gear 7, an output flange 15, an idler gear 17, a forward clutch KF including a forward clutch gear and a forward clutch hub gear, a reverse clutch KR including a reverse clutch gear and a reverse / second-gear clutch hub gear, a high-speed clutch KFH including a high-speed / third-gear clutch gear and a third-gear clutch hub gear, a first-gear clutch K1 including a first-gear clutch gear and a first-gear clutch hub gear, a second-gear clutch K2 including a reverse / second-gear clutch hub gear and a first-gear clutch hub gear, a third-gear clutch K3 including a third-gear clutch hub gear and an output gear, and a forward clutch gear meshing with a turbine shaft 5. The transmission system connects the turbine shaft 5 to the hydraulic torque converter 3. The forward clutch gear and forward clutch hub gear are combined via friction plate assemblies to form the forward clutch. When the forward clutch is engaged, the forward clutch gear and forward clutch hub gear are fixed and rotate synchronously. The reverse clutch gear meshes with the turbine shaft 5 for transmission. The reverse clutch gear and reverse / second gear clutch hub gear are combined via friction plate assemblies to form the reverse clutch. When the reverse clutch is engaged, the reverse clutch gear and reverse / second gear clutch hub gear are fixed and rotate synchronously. The forward clutch hub gear meshes with the reverse / second gear clutch hub gear for transmission. The high-speed / third gear clutch gear meshes with the third gear... The clutch hub gears, assembled via friction plate assemblies, form a high-speed clutch KFH. When the high-speed clutch is engaged, the high-speed / third-gear clutch gear and the third-gear clutch hub gear are fixed and rotate synchronously. The high-speed / third-gear clutch gear meshes with idler gear 17 for transmission, and idler gear 17 meshes with the forward clutch gear for transmission. The first-gear drive shaft gear 7 is fixedly connected to the forward clutch hub gear and rotates synchronously. The first-gear clutch gear meshes with the first-gear drive shaft gear 7 for transmission. The first-gear clutch gear and the first-gear clutch hub gear, assembled via friction plate assemblies, form a first-gear clutch. When the first-gear clutch is engaged, the first-gear clutch gear and the first-gear clutch hub gear are fixed and rotate synchronously. The first gear clutch hub gear meshes with the output gear 16 for transmission. The output gear 16 is fixedly connected to the output flange 15 outside the housing and rotates synchronously. The reverse / second gear clutch hub gear and the first gear clutch hub gear are combined through a friction plate assembly to form a second gear clutch. When the second gear clutch is engaged, the reverse / second gear clutch hub gear and the first gear clutch hub gear are engaged, fixed, and rotate synchronously. The reverse / second gear clutch hub gear meshes with the third gear clutch hub gear for transmission. The third gear clutch hub gear and the output gear 16 are combined through a friction plate assembly to form a third gear clutch. When the third gear clutch is engaged, the third gear clutch hub gear and the output gear 16 are engaged, fixed, and rotate synchronously.

[0030] In this embodiment and some other embodiments, the PTO input gear 4 is mounted on the turbine shaft 5 via bearings and can rotate independently; the reverse clutch gear is mounted on one side of the reverse / second gear clutch hub gear shaft via bearings and can rotate independently; a sleeve A is loosely fitted on the other side of the reverse / second gear clutch hub gear shaft, and the inner friction plate of the second gear clutch is mounted on the sleeve A, with both rotating synchronously and circumferentially. The sleeve A is fixedly connected to one end of the first gear clutch hub gear shaft, and this end of the first gear clutch hub gear shaft is mounted on the reverse / second gear clutch hub gear shaft via bearings, allowing both to rotate independently. Furthermore, one end of the shaft of the first gear clutch hub gear is supported by a bearing and installed in the housing. The first gear clutch gear is sleeved on the shaft of the first gear clutch hub gear through the bearing, so that it can rotate independently. A shaft sleeve B is loosely fitted on the shaft of the third gear clutch hub gear. The inner friction plate of the third gear clutch is sleeved on the shaft sleeve B, and the two are fixed in the circumferential direction and rotate synchronously. The shaft sleeve B is fixedly connected to one end of the shaft of the output gear 16. This end of the shaft of the output gear 16 is sleeved on the shaft of the third gear clutch hub gear through a bearing, so that the two can rotate independently. Furthermore, this end of the shaft of the output gear 16 is supported by a bearing and installed in the housing.

[0031] In this embodiment and some other embodiments, the forward clutch KF, the reverse clutch KR, and the high-speed clutch KFH are arranged sequentially from top to bottom below the turbine shaft 5. The first gear drive shaft 7 is arranged on the side of the forward clutch KF away from the hydraulic torque converter 3. The first gear clutch K1 and the output gear 16 are arranged sequentially from top to bottom below the first gear drive shaft 7. The second gear clutch K2 is arranged between the first gear clutch and the reverse clutch. The third gear clutch K3 is arranged below the second gear clutch. The idler wheel 17 is arranged below the high-speed clutch. The output flange 15 is arranged on the side of the output gear 16 away from the third gear clutch.

[0032] When the gearbox is in first gear, the forward clutch KF is engaged, the first gear clutch K1 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → forward clutch gear → first gear drive shaft gear 7 → first gear clutch gear → first gear clutch hub gear → output gear 16 → output flange 15.

[0033] When the transmission is in forward second gear, the forward clutch KF is engaged, the second gear clutch K2 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → forward clutch gear → forward clutch hub gear → reverse / second gear clutch hub gear → first gear clutch hub gear → output gear 16 → output flange 15.

[0034] When the transmission is operating in forward third gear, the high-speed clutch KFH is engaged, the second-gear clutch K2 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → forward clutch gear → idler gear 17 → high-speed / third-gear clutch gear → high-speed / third-gear clutch hub gear → reverse / second-gear clutch hub gear → first-gear clutch gear → output gear 16 → output flange 15.

[0035] When the transmission is in forward fourth gear, the forward clutch KF is engaged, the third gear clutch K3 is engaged, and the other clutches are not engaged. The specific transmission route is: torque converter 3 → turbine shaft 5 → forward clutch gear → forward clutch hub gear → reverse / second gear clutch hub gear → high speed / third gear clutch gear → high speed / third gear clutch hub gear → output gear 16 → output flange 15.

[0036] When the transmission is in forward fifth gear, the high-speed clutch KFH is engaged, the third-speed clutch K3 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → forward clutch gear → idler gear 17 → high-speed / third-speed clutch gear → high-speed / third-speed clutch hub gear → output gear 16 → output flange 15.

[0037] When the transmission is in reverse first gear, the reverse clutch KR is engaged, the first gear clutch K1 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → reverse clutch gear → reverse / second gear clutch hub gear → forward clutch hub gear → first gear clutch gear → first gear clutch hub gear → output gear 16 → output flange 15.

[0038] When the transmission is in reverse second gear, the reverse clutch KR is engaged, the second gear clutch K2 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → reverse clutch gear → reverse / second gear clutch hub gear → first gear clutch gear → output gear 16 → output flange 15.

[0039] When the transmission is operating in reverse third gear, the reverse clutch KR is engaged, the third gear clutch K3 is engaged, and the other clutches are not engaged. The specific transmission route is: hydraulic torque converter 3 → turbine shaft 5 → reverse clutch gear → reverse / second gear clutch hub gear → high speed / third gear clutch hub gear → output gear 16 → output flange 15.

[0040] The transmission principle of the gearbox with dual PTO in this embodiment is as follows:

[0041] PTO output: hydraulic torque converter 3 → PTO input gear 4 → PTO intermediate shaft gear 2 → first PTO output gear 101 / second PTO output gear 102;

[0042] The engine drives the hydraulic torque converter 3 to rotate, dividing the power into two parts. The first part: the PTO input gear 4 is connected to the pump wheel of the hydraulic torque converter 3 and rotates together with it. The PTO input gear 4 transmits power to the PTO intermediate shaft gear 2. The PTO intermediate shaft gear 2 transmits part of the power to the transmission oil pump, part to the first PTO output gear 101 on the left, and part to the second PTO output gear 102 on the right. The second part: the hydraulic torque converter 3 transmits power to the turbine shaft 5 through the rotation of the pump wheel. The turbine shaft 5 transmits the power to the gears of each gear in the transmission, and finally transmits it to the axle through the output shaft.

[0043] The oil pump in this embodiment includes two oil pumps, a main one and a secondary one. The oil pump on the left is the lubricating oil pump, which is the secondary oil pump and its main function is to provide lubrication for the gearbox. The oil pump on the right is the working oil pump, which is the main oil pump and its main function is to provide pressure and lubrication for each functional component.

[0044] The transmission in this embodiment of the invention consists of a hydraulic torque converter and an electromagnetically controlled shift transmission. The installed hydraulic torque converter 3 is a single-stage, two-phase, three-operation integrated hydraulic torque converter. The shift transmission is equipped with an external oil pump and a PTO structure. The oil pump is located above the transmission, allowing the vehicle's hydraulic system to obtain smooth power from the transmission for drive.

[0045] Advantages of the gearbox in the utility model embodiment:

[0046] 1. Multi-functional output: The dual PTO output design meets the power requirements under various working conditions.

[0047] 2. Compact structure: Optimized internal design reduces the need for additional distribution devices, lowers system complexity, and reduces costs.

[0048] 3. High reliability: High-strength gear design improves gear life;

[0049] 4. The PTO port is designed at the front end and adopts a speed-up transmission to increase the output speed of the PTO and improve the efficiency of the external hydraulic device.

[0050] 5. Suitable for more complex working conditions.

[0051] Traditional gearboxes in existing technology do not have other power output ports, so forklift manufacturers can only choose engines with power take-off ports when selecting engines, which affects the forklift manufacturers' choice of engines.

[0052] The transmission described in this application integrates the traditional transmission and the PTO structure of the vehicle's accessory power source. By using gear transmission, the accessory power is output from the transmission's hydraulic torque converter, thereby eliminating and simplifying the engine structure. The transmission also adds new power output functions and further broadens market choices and demands.

[0053] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A hydraulic transmission with PTO, characterized in that, It includes a housing and a PTO output gear (1), a PTO intermediate shaft gear (2), a hydraulic torque converter (3), a PTO input gear (4), a turbine shaft (5), a forward clutch, a first gear clutch, a second gear clutch, a third gear clutch, a reverse clutch and a high-speed clutch, which are installed in the housing. The PTO output gear (1) includes a first PTO output gear (101) and a second PTO output gear (102). The turbine shaft (5) is connected to the hydraulic torque converter (3) for transmission. The PTO input gear (4) is connected to the hydraulic torque converter (3) for transmission. The PTO intermediate shaft gear (2) meshes with the PTO input gear (4) for transmission. The PTO intermediate shaft gear (2) is connected to the oil pump. The PTO intermediate shaft gear (2) meshes with the first PTO output gear (101) and the second PTO output gear (102) for transmission respectively. The first PTO output gear (101) and the second PTO output gear (102) are respectively located on both sides of the PTO intermediate shaft gear (2). The forward clutch, first gear clutch, second gear clutch, third gear clutch, reverse clutch and high speed clutch are located below the turbine shaft (5).

2. A hydraulic transmission with PTO as described in claim 1, characterized in that, The oil pump is located on the side of the PTO intermediate shaft gear (2) near the forward clutch, and the hydraulic torque converter (3) is located on the other side of the PTO intermediate shaft gear (2) away from the forward clutch.

3. A hydraulic transmission with PTO as described in claim 1, characterized in that, It also includes a first-gear drive shaft gear (7), an output flange (15), an idler gear (17), a forward clutch including a forward clutch gear and a forward clutch hub gear, a reverse clutch including a reverse clutch gear and a reverse / second-gear clutch hub gear, a high-speed clutch including a high-speed / third-gear clutch gear and a third-gear clutch hub gear, a first-gear clutch including a first-gear clutch gear and a first-gear clutch hub gear, a second-gear clutch including a reverse / second-gear clutch hub gear and a first-gear clutch hub gear, a third-gear clutch including a third-gear clutch hub gear and an output gear, a forward clutch gear meshing with a turbine shaft (5), and a turbine shaft (5) transmitting power to a hydraulic torque converter (3). The forward clutch gear and the forward clutch hub gear are connected by friction plate assembly to form a forward clutch. When the forward clutch is engaged, the forward clutch gear and the forward clutch hub gear are engaged and rotate synchronously. The reverse clutch gear meshes with the turbine shaft (5) for transmission. The reverse clutch gear and the reverse / second gear clutch hub gear are connected by friction plate assembly to form a reverse clutch. When the reverse clutch is engaged, the reverse clutch gear and the reverse / second gear clutch hub gear are engaged and rotate synchronously. The forward clutch hub gear meshes with the reverse / second gear clutch hub gear for transmission. The high-speed / third gear clutch gear and the third gear clutch hub gear are connected by friction plate assembly. The high-speed clutch is formed by combining the gears. When the high-speed clutch is engaged, the high-speed / third-speed clutch gear and the third-speed clutch hub gear are engaged and rotate synchronously. The high-speed / third-speed clutch gear meshes with the idler gear (17) for transmission. The idler gear (17) meshes with the forward clutch gear for transmission. The first-speed drive shaft gear (7) is fixedly connected to the forward clutch hub gear and rotates synchronously. The first-speed clutch gear meshes with the first-speed drive shaft gear (7) for transmission. The first-speed clutch gear and the first-speed clutch hub gear are combined through the friction plate assembly to form the first-speed clutch. When the first-speed clutch is engaged, the first-speed clutch gear and the first-speed clutch hub gear are engaged and rotate synchronously. The first-speed clutch hub gear meshes with the drive shaft gear (7) for transmission. The output gear (16) meshes and drives, and the output gear (16) is fixedly connected to the output flange (15) outside the housing and rotates synchronously; the reverse / second gear clutch hub gear and the first gear clutch hub gear are combined through friction plate assembly to form a second gear clutch. When the second gear clutch is engaged, the reverse / second gear clutch hub gear and the first gear clutch hub gear are engaged and fixedly rotated synchronously; the reverse / second gear clutch hub gear meshes and drives with the third gear clutch hub gear. The third gear clutch hub gear and the output gear (16) are combined through friction plate assembly to form a third gear clutch. When the third gear clutch is engaged, the third gear clutch hub gear and the output gear (16) are engaged and fixedly rotated synchronously.

4. A hydraulic transmission with PTO as described in claim 3, characterized in that, The PTO input gear (4) is mounted on the turbine shaft (5) via a bearing and can rotate independently; the reverse clutch gear is mounted on one side of the reverse / second gear clutch hub gear shaft via a bearing and can rotate independently, and a sleeve A is loosely mounted on the other side of the reverse / second gear clutch hub gear shaft, the inner friction plate of the second gear clutch is mounted on the sleeve A and the two rotate synchronously in a fixed circumferential direction, the sleeve A is fixedly connected to one end of the first gear clutch hub gear shaft, and this end of the first gear clutch hub gear shaft is mounted on the reverse / second gear clutch hub gear shaft via a bearing so that the two can rotate independently, and the first gear clutch… One end of the shaft of the clutch hub gear is supported by a bearing and installed in the housing. The first gear clutch gear is sleeved on the shaft of the first gear clutch hub gear through a bearing so that it can rotate independently. A shaft sleeve B is loosely sleeved on the shaft of the third gear clutch hub gear. The inner friction plate of the third gear clutch is sleeved on the shaft sleeve B and the two are fixed in the circumferential direction and rotate synchronously. The shaft sleeve B is fixedly connected to one end of the shaft of the output gear (16). This end of the shaft of the output gear (16) is sleeved on the shaft of the third gear clutch hub gear through a bearing so that the two can rotate independently. Furthermore, this end of the shaft of the output gear (16) is supported by a bearing and installed in the housing.

5. A hydraulic transmission with PTO as described in claim 1, characterized in that, The forward clutch, reverse clutch, and high-speed clutch are arranged from top to bottom below the turbine shaft (5). The first gear transmission shaft gear (7) is arranged on the side of the forward clutch away from the hydraulic torque converter (3). The first gear clutch and the output gear (16) are arranged from top to bottom below the first gear transmission shaft gear (7). The second gear clutch is arranged between the first gear clutch and the reverse clutch. The third gear clutch is arranged below the second gear clutch. The idler wheel (17) is arranged below the high-speed clutch. The output flange (15) is arranged on the side of the output gear (16) away from the third gear clutch.

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