Final drive integrated winch, full hydraulic bulldozer and control method

Abstract

The present application relates to bulldozer technical field, especially a kind of final drive integrated winch, full hydraulic bulldozer and control method, including final drive mechanism and winch mechanism;Final drive mechanism includes: final drive input shaft;Final drive output shaft, final drive output shaft is connected between final drive input shaft by first reduction mechanism, to realize the speed reduction of final drive output shaft compared with final drive input shaft;Winch mechanism includes winch roller shaft, the winch roller shaft is connected between final drive output shaft by second reduction mechanism, second reduction mechanism is connected with final drive output shaft by winch engagement sleeve, second reduction mechanism is used to realize the speed reduction of winch roller shaft compared with final drive output shaft, winch engagement sleeve is used to realize the connection or separation of second reduction mechanism and final drive output shaft;Solve the technical problems that the cost of increasing hydraulic winch equipment is too high and cannot meet the winch for large tension, high rope speed and high power function in prior art full hydraulic bulldozer.

Description

Technical Field

[0001] This invention relates to the field of bulldozer technology, and in particular to a final drive integrated winch, a fully hydraulic bulldozer, and a control method thereof. Background Technology

[0002] Fully hydraulic bulldozers primarily utilize hydrostatic transmission, featuring stepless speed regulation, compact structure, small size, light weight, and flexible operation. Their engines boast high power, low fuel consumption, and a large torque reserve coefficient, resulting in high overall machine efficiency. They are mostly small to medium horsepower bulldozers. Hydraulic winches are hydraulically driven winches that utilize a hydraulic motor to directly or through a reduction gear mechanism to drive a drum. They mainly consist of a hydraulic motor, a normally closed hydraulic multi-plate brake, a reduction gearbox, a drum, and a frame. They offer advantages such as compact structure, small size, light weight, good safety, high efficiency, large starting torque, and good low-speed stability. Fully hydraulic bulldozers place extremely high demands on the performance of both the bulldozer and the winch, requiring high winch pulling force, fast rope speed, and good maneuverability. Typically, fully hydraulic bulldozers are equipped with hydraulic winches. However, hydraulic winches are complex in structure and very expensive to purchase. Adding a hydraulic winch requires either an additional working valve to control the direction and speed of the winch's hydraulic circuit (open system) or a closed-loop hydraulic pump as the system's oil source (closed system), as well as related control components, piping, and connectors. Therefore, adding a hydraulic winch assembly to a fully hydraulic bulldozer can often increase the overall cost by more than 30%, resulting in an excessively high price and reduced product competitiveness.

[0003] The prior art also discloses a variable speed final drive device for a fully hydraulic bulldozer and a bulldozer. The invention patent application with publication number CN108999950A includes a first-stage gear transmission assembly, a second-stage gear transmission assembly, and a third-stage gear transmission assembly. The first-stage gear transmission assembly includes a first drive shaft for connecting the hydraulic motor of the bulldozer, a clutch, a first gear set, and a second gear set. The clutch is used to selectively transmit the power from the first drive shaft to the first gear set or the second gear set, thereby realizing speed change. The first gear set or the second gear set transmits the power sequentially to the second-stage gear transmission assembly and the third-stage gear transmission assembly. The output end of the third-stage gear transmission assembly is connected to the sprocket of the bulldozer. The related technologies, including the above-mentioned technical solutions, still have many problems, such as: ① If a hydraulic winch is added, an expensive imported hydraulic winch needs to be selected separately. At the same time, the whole machine also needs to add a closed pump to provide power to the hydraulic winch or a working valve for controlling the hydraulic winch, as well as related hydraulic pipeline connections, electrical control, operation control, etc., which greatly increases the equipment cost; ② It cannot meet the requirements of high pulling force and high rope speed. The winch power and torque reserve need to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a final drive integrated winch, a fully hydraulic bulldozer, and a control method to solve the technical problems commonly found in existing fully hydraulic bulldozers, such as the high cost of adding a hydraulic winch and the inability to meet the winch's requirements for high pulling force, high rope speed, and high power.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An integrated final drive winch includes a final drive mechanism and a winch mechanism; The final drive mechanism includes: Final drive input shaft; A final drive output shaft is connected to the final drive input shaft via a first reduction mechanism to reduce the rotational speed of the final drive output shaft compared to the final drive input shaft. The winch mechanism includes: A winch roller shaft is connected to the final drive output shaft via a second reduction mechanism. The second reduction mechanism is connected to the final drive output shaft via a winch engagement sleeve. The second reduction mechanism is used to reduce the rotational speed of the winch roller shaft relative to the final drive output shaft. The winch engagement sleeve is used to connect or disconnect the second reduction mechanism from the final drive output shaft. The final drive output shaft is connected to the two tracks via a third reduction mechanism to drive the tracks to rotate. A final drive rotary clutch is installed in series between the final drive output shaft and the third reduction mechanism. The final drive rotary clutch is used to connect or disconnect the final drive output shaft from the tracks.

[0006] Furthermore, the second reduction mechanism includes a winch primary reduction drive gear rotatably mounted relative to the final drive output shaft, and a winch engagement sleeve slidably mounted relative to the final drive output shaft. The winch engagement sleeve slides to achieve synchronous rotation or separation of the winch primary reduction drive gear and the final drive output shaft.

[0007] Furthermore, the first reduction mechanism includes a first-stage reduction driving gear and a first-stage reduction driven gear that mesh with each other. The first-stage reduction driving gear is coaxially mounted with the final drive input shaft, and the first-stage reduction driven gear is coaxially mounted with the final drive output shaft.

[0008] Furthermore, the second reduction mechanism also includes a first-stage reduction driven gear of the winch that meshes with the first-stage reduction drive gear of the winch. The first-stage reduction driven gear of the winch is coaxially mounted with a second-stage reduction drive gear of the winch. The second-stage reduction drive gear of the winch meshes with and mounts a second-stage reduction driven gear of the winch. The second-stage reduction driven gear of the winch is coaxially mounted with a winch roller shaft.

[0009] Furthermore, the third reduction mechanism includes a planetary gear reducer sun gear connected to the final drive output shaft via a final drive rotary clutch. The planetary gear reducer sun gear meshes with the planetary gear reducer planet gears. The planetary gear reducer planet gears are simultaneously meshed with a gear ring, which is fixedly mounted relative to the frame. The planetary gear reducer planet gears are rotatably mounted on the planet gear shaft of the planetary carrier. The output shaft of the planetary carrier drives the track to move linearly via a sprocket.

[0010] Furthermore, a brake is installed on the final drive input shaft, which is used to rotate or stop the final drive input shaft.

[0011] A fully hydraulic bulldozer includes the aforementioned integrated final drive winch, wherein there are two final drive mechanisms, and the winch roller shaft of the winch mechanism is simultaneously driven to rotate by the two secondary reduction passive gears of the final drive mechanisms.

[0012] A fully hydraulic bulldozer includes the aforementioned integrated final drive winch, wherein there are two final drive mechanisms, and the winch roller shaft of each winch mechanism is driven to rotate by the secondary reduction passive gear of any one of the final drive mechanisms.

[0013] Furthermore, the fully hydraulic bulldozer also includes an engine connected to a triple pump via a coupling. The triple pump drives two final drive mechanisms via a travel motor. The travel motor controls the rotation of the final drive input shaft. The bulldozer also includes a travel handle, which controls the speed and direction of the travel pump and travel motor of the triple pump, thereby controlling the track speed or the forward or backward movement of the track, as well as the rope winding or unwinding speed of the winch.

[0014] A control method for a fully hydraulic bulldozer, comprising the following steps: S1. When the bulldozer is working, start the engine and operate the travel handle. The engine drives the travel pump of the triple pump through the coupling, which in turn drives the travel motor. The travel motor outputs the speed and the steering drive final transmission input shaft to rotate. S2. When the tracks need to move forward or backward, the final drive rotary clutch is engaged. The travel handle is pushed forward or pulled back to achieve bidirectional operation of the travel pump, driving the travel motor to rotate forward or backward, which in turn drives the final drive input shaft to rotate forward or backward. The final drive input shaft is driven by a first-stage reduction drive gear through a first-stage reduction driven gear, driving the final drive output shaft to rotate forward or backward. The final drive output shaft is driven by the final drive rotary clutch to drive the planetary gear reducer sun gear and planetary gear reducer planet gear through meshing, driving the planet carrier to rotate. The rotation of the planet carrier drives the tracks to rotate through the sprocket for linear motion, thus achieving forward or backward movement. S3. When the winch needs to release or retract the rope, the final drive rotary clutch disengages, the winch engagement sleeve closes, the track stops running, and the operating travel handle is pushed forward or pulled back to achieve bidirectional operation of the travel pump, driving the travel motor to rotate forward or reverse, which in turn drives the final drive input shaft to rotate forward or reverse. The final drive input shaft is driven by the first-stage reduction drive gear through the first-stage reduction driven gear, driving the final drive output shaft to rotate forward or reverse. The final drive output shaft is engaged with the first-stage reduction drive gear of the winch through the first-stage reduction drive gear of the winch. The first-stage reduction driven gear of the winch drives the second-stage reduction drive gear of the winch to rotate synchronously. The second-stage reduction drive gear of the winch engages with the second-stage reduction driven gear of the winch, driving the winch roller shaft to rotate, thus realizing the winch release or retract rope action. S4. When it is necessary to adjust the track running speed or winch speed, the current of the travel pump and travel motor can be increased or decreased by adjusting the thumb wheel of the travel handle, thereby controlling the speed of the travel motor and thus realizing the adjustment of the track running speed or winch speed.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: (1) In this invention, a final drive rotary clutch and a winch engagement sleeve are added to the final drive mechanism. The final drive rotary clutch is located between the first-stage reduction driven gear and the planetary gear reducer sun gear. When disengaged, it cuts off the track travel power, so that all the power of the original double-set closed hydraulic system used for travel is directed to the winch drive chain. The winch engagement sleeve slides on the first-stage reduction driven gear, introducing power into the newly added winch gear set, realizing the mechanical reversal of power introduction. The two work together so that the bulldozer does not need to be equipped with an additional hydraulic winch dedicated pump or working valve connection. The winch can be driven by the original travel hydraulic pump and motor, realizing the reuse of power source and greatly improving efficiency. This reduces the complexity and cost of the hydraulic system. At the same time, the final drive rotary clutch and winch engagement sleeve control the power input and cut-off of the travel and winch respectively, forming independent switching of functions. This allows the same travel hydraulic system to drive the track or winch under different working conditions. Since the power source remains unchanged, the speed regulation or reversing logic of the original travel handle closed pump and travel motor can be reused. When operating the winch, the direction of rope winding and unwinding is still controlled by pushing and pulling the handle, and the speed is controlled by the thumb wheel. The mechanical structure and electrical control system remain isomorphic, avoiding the redevelopment of new control valve groups, operating mechanisms and software logic, which significantly reduces the development cost and failure points of the electrical and control systems. (2). The winch transmission chain disclosed in this invention borrows the original single-stage spur gear reduction of the final drive and connects two stages of spur gear reduction in series to form a three-stage spur gear reduction to increase torque. There is no need to configure a separate winch gearbox. The position arrangement of the final drive rotary clutch and the winch engagement sleeve allows the travel transmission chain and the winch transmission chain to share the same brake. There is no need to set up a separate braking device for the winch, which further simplifies the structure. Through the spatial stacking of the gear set and the clutch, the winch transmission is completely embedded in the final drive housing, saving the overall layout space. At the same time, the power superposition of the dual travel system is used to achieve the winch performance of high pulling force and high rope speed. The final drive rotary clutch and the winch engagement sleeve achieve efficient drive of the winch by utilizing the existing travel system without adding a dedicated power source and control components for the hydraulic winch. This achieves multiple beneficial effects such as significantly reducing costs, increasing power density, simplifying operation and enhancing product competitiveness. Attached Figure Description

[0016] Figure 1 This is a simplified transmission diagram of the entire invention; Figure 2 This is the overall power transmission route of the present invention; Figure 3 This is a block diagram of the power transmission control of the present invention.

[0017] In the diagram: 1. Brake; 2. First-stage reduction drive gear; 3. First-stage reduction driven gear; 4. Planetary gear reducer sun gear; 5. Planetary gear reducer planet gear; 6. Gear ring; 7. Planetary carrier; 8. Sprocket; 9. Track; 10. Final drive rotary clutch; 11. Winch engagement sleeve; 12. Winch first-stage reduction drive gear; 13. Winch first-stage reduction driven gear; 14. Winch second-stage reduction drive gear; 15. Winch second-stage reduction driven gear; 16. Winch roller; 17. Engine; 18. Coupling; 19. Triple pump; 20. Travel motor; 21. Final drive mechanism; 23. Winch mechanism. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of this application. The singular forms “a,” “described,” and “…” used in the embodiments of this application and the appended claims are also considered. The word "the" is also intended to include the majority form unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0020] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0021] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" The description of the relationships between related objects indicates that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "OR" relationship. The invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] The present invention relates to a final drive integrated winch, a fully hydraulic bulldozer and a control method. It is mainly a technical improvement to address common problems in the prior art. In the prior art, the walking handle and walking controller of the walking closed hydraulic transmission system are the basis for operation. The configuration of a hydraulic winch on a fully hydraulic bulldozer often leads to a significant increase in the cost of the whole machine. Moreover, there is no good solution for the technical requirements of large winch pulling force and high rope speed. Example 1

[0025] See appendix Figure 1An integrated winch with a final drive includes a final drive mechanism 21 and a winch mechanism 23. The final drive mechanism 21 includes: a final drive input shaft; a brake 1 is mounted on the final drive input shaft for rotating or stopping the final drive input shaft. A final drive output shaft is connected to the final drive input shaft via a first reduction mechanism to reduce the rotational speed of the final drive output shaft compared to the final drive input shaft. Specifically, the first reduction mechanism includes a first-stage reduction drive gear 2 and a first-stage reduction driven gear 3 meshing with each other. The first-stage reduction drive gear 2 is coaxially mounted with the final drive input shaft, and the first-stage reduction driven gear 3 is coaxially mounted with the final drive output shaft.

[0026] See appendix Figure 1 The winch mechanism 23 includes: a winch roller shaft 16, on which a winch drum is coaxially mounted. The winch roller shaft 16 is connected to the final drive output shaft via a second reduction mechanism. The second reduction mechanism is connected to the final drive output shaft via a winch engagement sleeve 11. The second reduction mechanism is used to reduce the rotational speed of the winch roller shaft 16 relative to the final drive output shaft. The winch engagement sleeve 11 is used to connect or disconnect the second reduction mechanism from the final drive output shaft. Specifically, the second reduction mechanism includes a first-stage reduction drive gear 12 that is rotatably mounted relative to the final drive output shaft. That is, the first-stage reduction drive gear 12 is loosely fitted on the final drive output shaft, and the winch engagement sleeve 11 is slidably mounted on the final drive output shaft. The winch engagement sleeve 11 slides to achieve synchronous rotation or separation of the first-stage reduction drive gear 12 and the final drive output shaft. That is, when the winch engagement sleeve 11 is engaged, it synchronously locks the first-stage reduction drive gear 12 and the final drive output shaft. Specifically, the second reduction mechanism also includes a first-stage reduction driven gear 13 that meshes with the first-stage reduction drive gear 12 of the winch. The first-stage reduction driven gear 13 is coaxially mounted with a second-stage reduction drive gear 14. The second-stage reduction drive gear 14 meshes with a second-stage reduction driven gear 15, and the second-stage reduction driven gear 15 is coaxially mounted with a winch roller shaft 16. It can be understood that the main function of the winch engagement sleeve 11 is to switch power transmission through the axial movement of the gears.

[0027] See appendix Figure 1The final drive output shaft is connected to the two tracks 9 via a third reduction mechanism to drive the tracks 9 to rotate. A final drive rotary clutch 10 is installed in series between the final drive output shaft and the third reduction mechanism. The final drive rotary clutch 10 is used to connect or disconnect the final drive output shaft from the tracks 9. Specifically, the third reduction mechanism is a planetary gear reduction assembly, including a planetary gear reducer sun gear 4 connected to the final drive output shaft via the final drive rotary clutch 10. The planetary gear reducer sun gear 4 meshes with planetary gear reducer planet gears 5. The planetary gear reducer planet gears 5 are simultaneously meshed with a gear ring 6, which is fixedly installed relative to the frame. The planetary gear reducer planet gears 5 are rotatably mounted on the planetary gear shaft of the planetary carrier 7. The output shaft of the planetary carrier 7 drives the tracks 9 to move linearly via a sprocket 8.

[0028] The final drive integrated winch disclosed in this invention utilizes the original single-stage spur gear reduction of the final drive, and connects two more stages of spur gear reduction in series to form a three-stage spur gear reduction for torque amplification. This eliminates the need for a separate winch gearbox. The arrangement of the final drive rotary clutch 10 and the winch engagement sleeve 11 allows the traveling drive chain and the winch drive chain to share the same brake 1, eliminating the need for a separate braking device for the winch and further simplifying the structure. Through the spatial stacking of the gear set and the clutch, the winch drive is completely embedded in the final drive housing, saving overall layout space. At the same time, by utilizing the power superposition of the dual traveling systems, the winch performance of high pulling force and high rope speed is achieved. Example 2

[0029] See appendix Figure 1 and Figure 2 A fully hydraulic bulldozer includes a final drive integrated winch as described in Embodiment 1. There are two final drive mechanisms 21. The winch roller 16 of the winch mechanism 23 is simultaneously driven to rotate by the secondary reduction driven gears 15 of the two final drive mechanisms 21. The fully hydraulic bulldozer also includes an engine 17, which is connected to a triple pump 19 via a coupling 18. The triple pump 19 drives the two final drive mechanisms 21 respectively via a travel motor 20. The travel motor 20 controls the rotation of the final drive input shaft. It also includes a travel handle, which controls the speed and direction of the travel pump of the triple pump 19 and the travel motor 20, thereby controlling the speed of the track 9 or the forward or backward movement of the track 9, as well as the rope winding or unwinding speed of the winch. Understandably, the travel handle includes a push-pull button and a thumbwheel adjustment button. The push-pull button controls the running direction of the track 9 or the rotation direction of the winch, while the thumbwheel adjusts the speed of the travel motor 20, thereby controlling the running speed of the track 9 or the speed of the winch. When controlled by the travel handle, the movement of the travel handle needs to be converted into a control signal by the travel controller. This control signal is used to control the movement of the travel pump and the travel motor, thereby achieving the adjustment of the movement of each component. Example 3

[0030] The difference from Embodiment 2 is that this embodiment discloses a fully hydraulic bulldozer, including a final drive integrated winch of Embodiment 1, with two final drive mechanisms 21, and the winch roller 16 of the winch mechanism 23 is driven to rotate by the winch secondary reduction passive gear 15 of any one of the final drive mechanisms 21.

[0031] In this embodiment, the single-sided final drive integrated winch structure allows the final drive rotary clutch 10 to still be used to cut off the power of the track 9 on that side, avoiding travel interference, while the winch engagement sleeve 11 controls the single-sided hydraulic system to output power to the winch, forming a more flexible downgrade solution. Example 4

[0032] See appendix Figure 1-3 A control method for a fully hydraulic bulldozer, comprising the following steps: S1. Start the machine: When the bulldozer is working, start the engine 17, operate the travel handle, the engine 17 drives the travel pump of the triple pump 19 through the coupling 18, and then drives the travel motor 20 to move. The travel motor 20 outputs the speed and the steering drive final transmission input shaft to rotate. S2. When the track 9 needs to move forward or backward, the final drive rotary clutch 10 is engaged. The travel handle is pushed forward or pulled back to achieve bidirectional operation of the travel pump, driving the travel motor 20 to rotate forward or backward, which in turn drives the final drive input shaft to rotate forward or backward. The final drive input shaft is driven by the first-stage reduction drive gear 2 through the first-stage reduction driven gear 3, driving the final drive output shaft to rotate forward or backward. The final drive output shaft is driven by the final drive rotary clutch 10 to drive the planetary gear reducer sun gear 4 and planetary gear reducer planet gear 5 to rotate, driving the planet carrier 7 to rotate. The rotation of the planet carrier 7 drives the track 9 to rotate through the sprocket 8 for linear motion, thus achieving forward or backward movement. It can be understood that the winch engagement sleeve 11 is in a disengaged state at this time, so the winch is not working.

[0033] S3. When the winch needs to release or retract the rope, the final drive rotary clutch 10 disengages, the winch engagement sleeve 11 closes, the track 9 stops running, and the travel handle is pushed forward or pulled back to achieve bidirectional operation of the travel pump, driving the travel motor 20 to rotate forward or reverse, which in turn drives the final drive input shaft to rotate forward or reverse. The final drive input shaft is driven by the first-stage reduction drive gear 2 through the first-stage reduction driven gear 3, driving the final drive output shaft to rotate forward or reverse. The final drive output shaft is engaged with the first-stage reduction drive gear 13 of the winch through the first-stage reduction drive gear 12. The first-stage reduction driven gear 13 drives the second-stage reduction drive gear 14 of the winch to rotate synchronously. The second-stage reduction drive gear 14 engages with the second-stage reduction driven gear 15 of the winch, driving the winch roller shaft 16 to rotate, thus realizing the winch releasing or retracting the rope. It should be understood that the track 9 is in a stopped state at this time.

[0034] S4. When it is necessary to adjust the running speed of track 9 or the speed of winch, the current of travel pump and travel motor 20 can be increased or decreased by adjusting the thumb wheel of travel handle, thereby controlling the speed of travel motor 20, so as to realize the adjustment of the running speed of track 9 or the speed of winch.

[0035] The beneficial effects achieved by this invention are as follows: 1. Significant cost reduction: The winch fully reuses the original vehicle's hydraulic power source consisting of engine 17, triple pump 19, and travel motor 20, eliminating the need for additional winch hydraulic pumps, multi-way directional valves, and independent hydraulic pipelines. This also eliminates the need for external hydraulic motors and dedicated gearboxes, reducing the overall winch cost by more than 30%. 2. Excellent power performance: The winch features a three-stage gear reduction system (one stage in the final drive + two stages in the winch), resulting in a large reduction ratio. Dual-path confluence of the travel motors on both sides allows for dual-path drive of the drum, achieving high traction. The rope speed can be directly changed by adjusting the displacement of the travel motor 20, meeting high rope speed requirements. The single-drive mode allows for power extraction from one side as needed, suitable for light traction operations. 3. Mechanical partitioning and non-interference: The final drive rotary clutch 10 disconnects the power from the track 9, while the winch engagement sleeve 11 connects to the winch power. The two clutches mechanically achieve travel / … The winch operating conditions are interlocked, and there is no power crosstalk during operation switching; the whole machine shares the same input shaft brake 1, eliminating the need for additional winch braking structures, simplifying the housing layout; the winch transmission is fully integrated inside the final drive housing, resulting in a compact overall layout; 4. Universal operation: the original travel handle is used to realize winch reversing and speed adjustment without adding new operating handles or electrical control modules, the control logic is universal, reducing electrical control development costs and lowering the learning cost of operation.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A final drive integrated winch, characterized in that, Includes a final drive mechanism (21) and a winch mechanism (23); The final drive mechanism (21) includes: Final drive input shaft; A final drive output shaft is connected to the final drive input shaft via a first reduction mechanism to reduce the rotational speed of the final drive output shaft compared to the final drive input shaft. The winch mechanism (23) includes: The winch roller shaft (16) is connected to the final drive output shaft via a second reduction mechanism. The second reduction mechanism is connected to the final drive output shaft via a winch engagement sleeve (11). The second reduction mechanism is used to reduce the rotational speed of the winch roller shaft (16) relative to the final drive output shaft. The winch engagement sleeve (11) is used to connect or disconnect the second reduction mechanism from the final drive output shaft. The final drive output shaft is connected to the two tracks (9) through the third reduction mechanism to drive the tracks (9) to rotate. A final drive rotary clutch (10) is installed in series between the final drive output shaft and the third reduction mechanism. The final drive rotary clutch (10) is used to connect or separate the final drive output shaft from the tracks (9).

2. The final drive integrated winch according to claim 1, characterized in that, The second reduction mechanism includes a winch first-stage reduction drive gear (12) rotatably mounted relative to the final drive output shaft. The winch engagement sleeve (11) is slidably mounted relative to the final drive output shaft. The winch engagement sleeve (11) slides to achieve synchronous rotation or separation of the winch first-stage reduction drive gear (12) and the final drive output shaft.

3. The final drive integrated winch according to claim 2, characterized in that, The first reduction mechanism includes a first-stage reduction drive gear (2) and a first-stage reduction driven gear (3) that mesh with each other. The first-stage reduction drive gear (2) is coaxially mounted with the final drive input shaft, and the first-stage reduction driven gear (3) is coaxially mounted with the final drive output shaft.

4. The final drive integrated winch according to claim 3, characterized in that, The second reduction mechanism also includes a first-stage reduction driven gear (13) of the winch that meshes with the first-stage reduction drive gear (12). The first-stage reduction driven gear (13) of the winch is coaxially mounted with a second-stage reduction drive gear (14). The second-stage reduction drive gear (14) of the winch meshes with a second-stage reduction driven gear (15). The second-stage reduction driven gear (15) of the winch is coaxially mounted with a winch roller shaft (16).

5. A final drive integrated winch according to claim 4, characterized in that, The third reduction mechanism includes a planetary gear reducer sun gear (4) connected to the final drive output shaft via a final drive rotary clutch (10). The planetary gear reducer sun gear (4) meshes with the planetary gear reducer planet gear (5). The planetary gear reducer planet gear (5) is also meshed with a gear ring (6). The gear ring (6) is fixedly installed relative to the frame. The planetary gear reducer planet gear (5) is rotatably mounted on the planetary gear shaft of the planetary carrier (7). The output shaft of the planetary carrier (7) drives the track (9) to move linearly via a sprocket (8).

6. The final drive integrated winch according to claim 5, characterized in that, A brake (1) is installed on the final drive input shaft, which is used to realize the rotation or stop of the final drive input shaft.

7. A fully hydraulic bulldozer, comprising a final drive integrated winch as described in any one of claims 1-6, characterized in that, There are two final drive mechanisms (21), and the winch roller shaft (16) of the winch mechanism (23) is driven to rotate simultaneously by the two final drive mechanisms (21) winch secondary reduction passive gears (15).

8. A fully hydraulic bulldozer, comprising a final drive integrated winch as described in any one of claims 1-6, characterized in that, There are two final drive mechanisms (21), and the winch roller shaft (16) of the winch mechanism (23) is driven to rotate by the winch secondary reduction passive gear (15) of any one of the final drive mechanisms (21).

9. A fully hydraulic bulldozer according to claim 7 or 8, characterized in that, The fully hydraulic bulldozer also includes an engine (17), which is connected to a triple pump (19) via a coupling (18). The triple pump (19) drives two final drive mechanisms (21) via a travel motor (20). The travel motor (20) controls the rotation of the final drive input shaft. The bulldozer also includes a travel handle, which controls the speed and direction of the travel pump and the travel motor (20) of the triple pump (19), thereby controlling the speed of the track (9) or the forward or backward movement of the track (9), as well as the winding or unwinding speed of the winch.

10. A control method for a fully hydraulic bulldozer, characterized in that, The steps of this method are as follows: S1. When the bulldozer is working, start the engine (17), operate the travel handle, the engine (17) drives the travel pump of the triple pump (19) through the coupling (18), and then drives the travel motor (20) to move. The travel motor (20) outputs the speed and the steering drive final transmission input shaft to rotate. S2. When the track (9) needs to move forward or backward, the final drive rotary clutch (10) is closed, and the walking handle is pushed forward or pulled back to realize the bidirectional operation of the walking pump, drive the walking motor (20) to rotate forward or backward, and then drive the final drive input shaft to rotate forward or backward. The final drive input shaft is driven by the first-stage reduction drive gear (2) through the first-stage reduction driven gear (3) to drive the final drive output shaft to rotate forward or backward. The final drive output shaft is driven by the final drive rotary clutch (10) to drive the planetary gear reducer sun gear (4) and the planetary gear reducer planet gear (5) to rotate, drive the planet carrier (7) to rotate, and the rotation of the planet carrier (7) drives the track (9) to rotate through the sprocket (8) to perform linear motion, thereby realizing forward or backward movement. S3. When the winch needs to release or retract the rope, the final drive rotary clutch (10) is disengaged, the winch engagement sleeve (11) is closed, the track (9) stops running, and the walking handle is pushed forward or pulled back to realize the bidirectional operation of the walking pump, drive the walking motor (20) to rotate forward or reverse, and then drive the final drive input shaft to rotate forward or reverse. The final drive input shaft is driven by the first-level reduction drive gear (2) through the first-level reduction passive gear (3) to drive the final drive output shaft to rotate forward or reverse. The final drive output shaft is engaged with the first-level reduction drive gear (13) of the winch through the first-level reduction drive gear (12). The first-level reduction passive gear (13) of the winch drives the second-level reduction drive gear (14) of the winch to rotate synchronously. The second-level reduction drive gear (14) of the winch is engaged with the second-level reduction passive gear (15) of the winch. The second-level reduction passive gear (15) of the winch drives the winch roller shaft (16) to rotate, thus realizing the winch release or retracting of the rope. S4. When it is necessary to adjust the running speed of the track (9) or the speed of the winch, the current of the travel pump and the travel motor (20) can be increased or decreased by adjusting the thumb wheel of the travel handle, thereby controlling the speed of the travel motor (20) and thus realizing the adjustment of the running speed of the track (9) or the speed of the winch.

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