Hydraulic gear shifting device

Abstract

The invention provides a hydraulic gear shifting device, and relates to the technical field of mechanical engineering. The hydraulic gear shifting device comprises an input shaft, an output shaft, a clutch, a fan-shaped block, a shifting fork, a gear shifting rod and a gear shifting oil cylinder. A first input gear, a second input gear, a first external spline, a second external spline and a third external spline are arranged on the input shaft; a first output gear and a second output gear are arranged on the output shaft, the first output gear is meshed with the second input gear, and the second output gear is meshed with the first input gear; the clutch is provided with an annular groove and an internal spline, the external spline is connected with the clutch, the fan-shaped block is connected with the clutch, the fan-shaped block is connected with the shifting fork, the shifting fork is connected with the gear shifting rod, and the gear shifting rod is connected with the gear shifting oil cylinder; an oil inlet and an oil return opening are formed in the gear shifting oil cylinder. A user does not need to manually apply force or judge the gear shifting time, the gear shifting process can be completed only by adjusting the flow direction of the hydraulic oil, and the operation complexity of the gear shifting device is reduced through the design.

Description

Technical Field

[0001] This application relates to the technical field of mechanical engineering, and particularly to a hydraulic gear shifting device. Background Art

[0002] A hydraulic gear shifting device is a device that uses a hydraulic system to achieve gear shifting of mechanical equipment. Its main function is to drive the shifting actuator through hydraulic pressure, thereby achieving smooth, rapid and accurate gear shifting.

[0003] The gearbox shifting devices in the prior art mainly achieve shifting through manual operation. When shifting gears, the user manually applies force to move the shifting transmission structure along the sliding direction of the spline shaft, thereby changing the meshing state of the gears and achieving the switching of different gears. In this way, the user can select the appropriate gear under different working conditions to meet different power transmission requirements.

[0004] The gearbox shifting devices of the prior art have the problem of high operation complexity. Since the shifting process depends on the user manually applying force to move the shifting transmission structure, the user must judge the appropriate shifting timing and force under different working conditions to avoid poor gear meshing or wear. This high requirement for operation accuracy increases the operation complexity. At the same time, in a dangerous environment, the safety of manual shifting is low. Summary of the Invention

[0005] This application provides a hydraulic gear shifting device to solve the problem of high operation complexity of the gearbox shifting device in the prior art.

[0006] In a first aspect, this application provides a hydraulic gear shifting device, which includes: an input shaft, an output shaft, a clutch, a sector block, a first screw, a shifting fork, a shifting lever and a shifting oil cylinder;

[0007] A first input gear and a second input gear are provided on the input shaft. A first external spline is provided between the first input gear and the second input gear. A second external spline is provided on the side of the first input gear close to the first external spline. A third external spline is provided on the side of the second input gear close to the first external spline;

[0008] A first output gear and a second output gear are provided on the output shaft. The first output gear meshes with the second input gear, and the second output gear meshes with the first input gear;

[0009] The clutch is provided with an annular groove and an internal spline. The first external spline is connected to the clutch through the internal spline. One end of the sector block is connected to the clutch through the annular groove. The other end of the sector block is connected to one end of the shift fork through the first screw. The other end of the shift fork is connected to one end of the shift lever. The other end of the shift lever is connected to the piston in the shift cylinder.

[0010] The shift cylinder is provided with an oil inlet and an oil return port.

[0011] When the hydraulic gear shift device shifts gears, the oil inlet and the oil return port are used to switch the flow direction of the hydraulic oil to generate a pressure difference in the shift cylinder. The piston is used to perform an axial movement according to the pressure difference, so that the shift lever drives the shift fork and the clutch to perform an axial movement. The clutch is used to connect with the second external spline or the third external spline according to the axial movement. When the clutch is connected to the second external spline, the second external spline is used to drive the first input gear to rotate, so that the first input gear drives the second output gear to rotate. When the clutch is connected to the third external spline, the third external spline is used to drive the second input gear to rotate, so that the second input gear drives the first output gear to rotate.

[0012] In a possible design, the hydraulic gear shift device further includes: a flange. The flange is connected to the shift cylinder through a second screw. The other end of the shift lever is connected to the piston in the shift cylinder through the flange.

[0013] In a possible design, the flange is provided with a first sealing ring, and the first sealing ring is used to prevent the hydraulic oil in the shift cylinder from leaking.

[0014] In a possible design, the flange is provided with a first wear-resistant ring, a first rotary Grease seal and a dust-proof ring. The first wear-resistant ring is used to reduce the wear between the shift lever and the flange. The first rotary Grease seal is used to prevent the hydraulic oil in the shift cylinder from leaking. The dust-proof ring is used to prevent impurities from entering the shift cylinder.

[0015] In a possible design, the hydraulic gear shift device further includes: a shift ring. The other end of the shift lever is provided with a concave groove. The shift ring is provided with a protrusion. The concave groove on the shift lever is connected to the protrusion on the shift ring. The shift ring is connected to the piston.

[0016] In a possible design, a fixing nut is arranged outside the shift ring. A retaining ring is arranged outside the fixing nut. The retaining ring is connected to the piston. The fixing nut is used to fix the shift ring. The retaining ring is used to prevent the fixing nut from loosening.

[0017] In a possible design, a second wear-resistant ring and a second rotary packing ring are provided on the shift piston. The second wear-resistant ring is used to reduce the wear between the shift piston and the shift oil cylinder, and the second rotary packing ring is used to prevent the hydraulic oil in the shift oil cylinder from leaking.

[0018] In a possible design, a round nut and a thrust washer are provided at one end of the shift lever. The round nut is used to fix the connection between the shift fork and the shift lever, and the thrust washer is used to prevent the round nut from loosening.

[0019] In a possible design, an oil guide hole is provided on the shift lever. The oil guide hole is used to guide the gear oil to lubricate the shift lever.

[0020] In a possible design, a guiding structure is provided on the internal spline. The guiding structure is used to ensure that the clutch maintains the correct moving direction when moving axially.

[0021] The present application provides a hydraulic gear shifting device, which includes: an input shaft, an output shaft, a clutch, a sector block, a first screw, a fork, a shift lever, and a shift oil cylinder; a first input gear and a second input gear are provided on the input shaft, a first external spline is provided between the first input gear and the second input gear, a second external spline is provided on a side of the first input gear close to the first external spline, and a third external spline is provided on a side of the second input gear close to the first external spline; a first output gear and a second output gear are provided on the output shaft, the first output gear meshes with the second input gear, and the second output gear meshes with the first input gear; an annular groove and an internal spline are provided on the clutch, the first external spline is connected to the clutch through the internal spline, one end of the sector block is connected to the clutch through the annular groove, the other end of the sector block is connected to one end of the fork through the first screw, the other end of the fork is connected to one end of the shift lever, and the other end of the shift lever is connected to a piston in the shift oil cylinder; an oil inlet and an oil return port are provided on the shift oil cylinder; when the hydraulic gear shifting device shifts gears, the oil inlet and the oil return port are used to switch the flow direction of the hydraulic oil to generate a pressure difference in the shift oil cylinder, the piston is used to perform an axial movement according to the pressure difference, so that the shift lever drives the fork and the clutch to perform an axial movement, and the clutch is used to connect with the second external spline or the third external spline according to the axial movement. When the clutch is connected to the second external spline, the second external spline is used to drive the first input gear to rotate, so that the first input gear drives the second output gear to rotate. When the clutch is connected to the third external spline, the third external spline is used to drive the second input gear to rotate, so that the second input gear drives the first output gear to rotate. In the hydraulic gear shifting device according to the embodiment of the present application, the user does not need to manually apply force or judge the shifting timing, and only needs to adjust the flow direction of the hydraulic oil to complete the shifting process. By controlling the flow direction of the hydraulic oil at the oil inlet and the oil return port, the pressure difference in the oil cylinder can be controlled. This pressure difference drives the piston to perform an axial movement, thereby driving the clutch to perform a corresponding movement, so that the clutch is connected to the first external spline or the second external spline, and the gear is switched. When the clutch is connected to the first external spline, the first external spline drives the first input gear to rotate, so that the first input gear drives the second output gear to rotate. When the clutch is connected to the second external spline, the second external spline is used to drive the second input gear to rotate, so that the second input gear drives the first output gear to rotate. This design enables the user to no longer need to judge and operate the shifting timing and force, reduces the operation complexity, and improves the safety of the shifting operation. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 1 ;

[0024] Figure 2 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 2 ;

[0025] Figure 3 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 3 ;

[0026] Figure 4 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 4 ;

[0027] Figure 5 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 5 。

[0028] Explanation of reference numerals:

[0029] 100 - Input shaft;

[0030] 101 - First input gear;

[0031] 102 - Second input gear;

[0032] 103 - First external spline;

[0033] 104 - Second external spline;

[0034] 105 - Third external spline;

[0035] 200 - Output shaft;

[0036] 201 - First output gear;

[0037] 202 - Second output gear;

[0038] 300 - Clutch;

[0039] 301 - Annular groove;

[0040] 302 - Internal spline;

[0041] 303 - Guide structure;

[0042] 400 - Sector block;

[0043] 500 - First screw;

[0044] 600 - Fork;

[0045] 700 - Shift lever;

[0046] 701 - Round nut;

[0047] 702 - Thrust washer;

[0048] 703 - Oil guiding hole;

[0049] 800 - Shift cylinder;

[0050] 801 - Piston;

[0051] 802 - Oil inlet;

[0052] 803 - Oil return port;

[0053] 804 - Shift ring;

[0054] 805 - Fixing nut;

[0055] 806 - Retaining ring;

[0056] 807 - Second wear-resistant ring;

[0057] 808 - Second rotating Grease seal;

[0058] 900 - Flange;

[0059] 901 - First sealing ring;

[0060] 902 - First wear-resistant ring;

[0061] 903 - First rotating Grease seal;

[0062] 904 - Dust seal;

[0063] 1000 - Second screw. Detailed implementation mode

[0064] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0065] In the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner. In the embodiments of the present application, "at least one" means one or more, and "a plurality of" means two or more.

[0066] It should be noted that "when... " in the embodiments of the present application can be at the instant when a certain situation occurs, or within a period of time after a certain situation occurs. The embodiments of the present application do not make specific limitations on this. In addition, a hydraulic gear shift device provided in the embodiments of the present application is only an example, and the hydraulic gear shift device may also include more or less content.

[0067] To facilitate a clear description of the technical solutions of the embodiments of the present application, the following briefly introduces some terms and technologies involved in the embodiments of the present application:

[0068] Gear shift device: It is a mechanical or electronic system for a transmission system that allows a user to switch between different gears to adapt to different working conditions. Common gear shift devices include the gear shift lever and clutch in a manual transmission, and the gear shift knob or paddle shifters in an automatic transmission.

[0069] Fork: It is a mechanical component in a transmission. Its main function is to move gears or synchronizer sleeves during gear shifting to achieve switching between different gears. The fork is usually connected to the gear shift lever or shift mechanism. When the user operates the gear shift lever, the fork slides in the guide groove, pushing the gear into or out of the engaged position, thereby changing the transmission ratio.

[0070] External spline: It is a shaft-like part in mechanical design, and its surface is evenly distributed with a plurality of protruding tooth-like structures along the axial direction. These tooth-like structures mesh with corresponding structures to transmit torque and rotational motion, while allowing a certain degree of axial sliding.

[0071] Internal spline: It is a hole-type part in mechanical design. Multiple recessed tooth grooves are evenly distributed along the axial direction on its inner surface. These tooth grooves mesh with the corresponding external splines to transmit torque and rotational motion, while allowing a certain degree of axial sliding. Internal splines are commonly used in various mechanical devices such as gears, couplings, and flywheels to ensure reliable power transmission and precise alignment of components.

[0072] Rotary Gland Packing: It is a seal used to seal a rotating shaft, usually made of wear-resistant and high-temperature-resistant materials. It has one or more lips that can maintain close contact during the rotation of the shaft, thus effectively preventing the leakage of liquid or gas. Rotary Gland Packing is widely used in hydraulic systems, pumps, compressors, and other rotating equipment to ensure the sealing performance and operating efficiency of the system.

[0073] Here, exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0074] The technical solution of the present invention will be described in detail below with specific embodiments. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0075] To clearly understand the technical solution of this application, the solutions of the prior art will be introduced in detail first. In the prior art, hydraulic gear shifting is usually achieved through a hydraulic system. This system uses the hydraulic pressure generated by a hydraulic pump to drive a shifting actuator or piston to achieve gear shifting. The hydraulic oil is guided to a specific shifting actuator under the action of a control valve to push the piston to move, thereby driving the fork or synchronizer sleeve to engage or disengage the gears. Precise control of the hydraulic system can achieve fast and smooth shifting operations.

[0076] However, the gearbox shifting device of the prior art has the problem of high operation complexity. Since the shifting process relies on the user to manually apply force to move the shifting transmission structure, the user must judge the appropriate shifting timing and force under different working conditions to avoid poor gear meshing or wear. This high requirement for operation precision increases the operation complexity.

[0077] Therefore, in view of the problem of high operation complexity of the gearbox shifting device in the prior art, it is found in the research that to solve this problem, an automated or semi-automated shifting system can be introduced. By using an electronic control unit and sensors, the shifting timing can be accurately judged and the shifting operation can be executed, thereby reducing the operation burden of the user and improving the shifting efficiency: ① Introduce an electronically controlled hydraulic shifting system in the transmission, and use an electronically controlled hydraulic actuator to assist the shifting operation. The user only needs to simply operate the shift lever, and the system will automatically adjust the shifting force and timing according to the current working conditions, reducing the requirements for the user's operation accuracy. ② Adopt automatic transmission technology, and use an electronic control unit and sensors to monitor the operating state of the equipment in real time and automatically execute the shifting operation. The user does not need to manually judge and operate the shifting timing, and the system can automatically adjust the shifting strategy according to the working conditions.

[0078] Specifically: An automated shifting operation can be achieved through a hydraulic drive system. The system uses the pressure difference generated by a hydraulic cylinder to drive a piston to perform linear motion, and then transfers the motion to the clutch through a series of mechanical connectors. Under the action of hydraulic drive, the clutch moves to select different gear combinations, thereby changing the transmission ratio and achieving shifting.

[0079] In the hydraulic gear shifting device of the embodiment of the present application, by adjusting the flow direction of the hydraulic oil through the oil inlet and the oil return port, a pressure difference is generated in the shifting oil cylinder to drive the piston to perform axial movement. The movement of the piston is transmitted to the clutch through the shift lever and the shift fork, causing the clutch to move axially and connect with different external splines, realizing the switching of the input gear and the output gear and completing the shifting operation. The shifting operation is simplified, the user does not need to manually apply force or judge the shifting timing, the operation complexity of the shifting device is reduced, and the safety of the shifting operation is improved.

[0080] Based on the above creative discovery, the technical solution of the present application is proposed.

[0081] The embodiments of the present application will be introduced below with reference to the accompanying drawings of the specification.

[0082] Figure 1 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 1 。 Figure 2 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 2 。As Figure 1 and Figure 2 shown, in this embodiment, the hydraulic gear shifting device includes: an input shaft 100, an output shaft 200, a clutch 300, a sector block 400, a first screw 500, a shift fork 600, a shift lever 700, and a shifting oil cylinder 800.

[0083] Specifically, the input shaft 100 and the output shaft 200 are key components of the transmission system. The input shaft 100 is used to receive power and transmit it to the output shaft 200 through gears. The first output gear 201 and the second output gear 202 are installed on the output shaft 200 and mesh with the gears on the input shaft 100 to output the power after speed change. The clutch 300 is connected to the external spline through the internal spline 302 and can selectively connect different external splines during axial movement to achieve different gear combinations and gearshifts. The sector block 400 is connected to the clutch 300 through the annular groove 301 and connected to the shift fork 600 through the first screw 500 to transmit the movement of the shift lever 700 to the clutch 300. The shift fork 600 is connected between the shift lever 700 and the sector block 400 to play a role in transmitting movement. The shift lever 700 is connected between the shift fork 600 and the piston 801 of the shift cylinder 800 to transmit the axial movement generated in the shift cylinder 800 to the shift fork 600. The shift cylinder 800 controls the flow direction of the hydraulic oil through the oil inlet 802 and the oil return port 803 to generate a pressure difference to push the piston 801 to perform axial movement, thereby realizing the gearshift operation.

[0084] The first input gear 101 and the second input gear 102 are provided on the input shaft 100. A first external spline 103 is provided between the first input gear 101 and the second input gear 102. A second external spline 104 is provided on the side of the first input gear 101 close to the first external spline 103, and a third external spline 105 is provided on the side of the second input gear 102 close to the first external spline 103.

[0085] Specifically, the first input gear 101, the second input gear 102, the first external spline 103, the second external spline 104, and the third external spline 105 are arranged on the input shaft 100 through a specific mechanical structure. This arrangement realizes the power transmission and switching between different gears by arranging the gears and splines axially in sequence. The first external spline 103 is located between the two input gears, allowing the clutch 300 to slide thereon and mesh with it, thereby selectively connecting different gears. The second external spline 104 and the third external spline 105 are located on both sides of the first input gear and the second input gear respectively, providing connection points with the clutch 300 to realize different transmission paths. When the clutch 300 is connected to the second external spline 104, the power is transmitted through the first input gear 101; when the clutch 300 is connected to the third external spline 105, the power is transmitted through the second input gear 102. This design is used to achieve different transmission ratios to meet different working requirements.

[0086] The first output gear 201 and the second output gear 202 are provided on the output shaft 200. The first output gear 201 meshes with the second input gear 102, and the second output gear 202 meshes with the first input gear 101.

[0087] Specifically, the first output gear 201 meshes with the second input gear 102, while the second output gear 202 meshes with the first input gear 101. This gear meshing relationship is achieved through precise gear design and axial arrangement to ensure that the power of the input shaft can be effectively transmitted to the output shaft under different clutch connection states. Through this design, the system can achieve different transmission ratios according to the selective connection of the clutch 300, thereby meeting different working conditions and performance requirements. This structure is used to provide flexible power output options in the transmission system to adapt to different operating needs.

[0088] The clutch 300 is provided with an annular groove 301 and an internal spline 302. The first external spline 103 is connected to the clutch 300 through the internal spline 302. One end of the sector block 400 is connected to the clutch 300 through the annular groove 301. The other end of the sector block 400 is connected to one end of the shift fork 600 through the first screw 500. The other end of the shift fork 600 is connected to one end of the shift lever 700. The other end of the shift lever 700 is connected to the piston 801 in the shift cylinder 800.

[0089] Specifically, the structural design of the clutch 300 enables it to achieve flexible connection and disconnection in the transmission system. The clutch 300 is provided with an internal spline 302 and an annular groove 301. The internal spline 302 meshes with the first external spline 103 on the input shaft 100, enabling the clutch to slide axially and selectively connect different external splines. The annular groove 301 is used to connect to one end of the sector block 400, enabling the sector block 400 to transmit force when the clutch 300 moves axially. The other end of the sector block 400 is connected to the shift fork 600 through the first screw 500. The shift fork 600 is then connected to the piston 801 in the shift cylinder 800 through the shift lever 700. When the shift cylinder 800 pushes the piston 801 through hydraulic operation, the axial movement of the piston is transmitted to the shift fork 600 through the shift lever 700, and then acts on the clutch 300 through the sector block 400 to achieve the axial movement of the clutch 300. This design is used to achieve the selective meshing of different gears in the transmission system, thereby changing the transmission ratio to meet different gear requirements.

[0090] The shift cylinder 800 is provided with an oil inlet 802 and an oil return port 803.

[0091] Specifically, the shift cylinder 800 achieves hydraulic control by setting an oil inlet 802 and an oil return port 803. These two oil ports are respectively used for the input and output of hydraulic oil. The oil inlet 802 is connected to the pressure source of the hydraulic system. When the hydraulic oil enters the cylinder through this port, the generated hydraulic pressure pushes the piston 801 in the cylinder to move axially. The oil return port 803 is used for discharging the hydraulic oil. When it is necessary to change the movement direction of the piston 801 or reset it, the hydraulic oil is discharged from the cylinder through the oil return port 803. By controlling the oil flow direction and pressure of the oil inlet 802 and the oil return port 803, the shift cylinder 800 can accurately control the movement of the piston 801, thereby realizing the drive of the shift lever 700 and ultimately realizing the axial movement of the clutch 300 and the gear shift. This design is used to provide a reliable and controllable shift operation in the transmission system.

[0092] When shifting gears in the hydraulic gear shifting device, the oil inlet 802 and the oil return port 803 are used to switch the flow direction of the hydraulic oil to generate a pressure difference within the shift cylinder 800. The piston 801 is used to perform axial movement according to the pressure difference, so that the shift lever 700 drives the fork 600 and the clutch 300 to perform axial movement. The clutch 300 is used to connect with the second external spline 104 or the third external spline 105 according to the axial movement. When the clutch 300 is connected to the second external spline 104, the second external spline 104 is used to drive the first input gear 101 to rotate, so that the first input gear 101 drives the second output gear 202 to rotate. When the clutch 300 is connected to the third external spline 105, the third external spline 105 is used to drive the second input gear 102 to rotate, so that the second input gear 102 drives the first output gear 201 to rotate.

[0093] A hydraulic gear shifting device provided in this embodiment can control the pressure difference within the cylinder by controlling the flow direction of the hydraulic oil at the oil inlet and the oil return port. This pressure difference drives the piston to perform axial movement, thereby driving the clutch to perform corresponding movement, connecting the clutch with the first external spline or the second external spline, and realizing gear shift. When the clutch is connected to the first external spline, the first external spline drives the first input gear to rotate, so that the first input gear drives the second output gear to rotate. When the clutch is connected to the second external spline, the second external spline is used to drive the second input gear to rotate, so that the second input gear drives the first output gear to rotate. The hydraulic gear shifting device achieves the following technical effects: By controlling the flow direction of the hydraulic oil at the oil inlet and the oil return port, a pressure difference within the cylinder is generated, thereby driving the piston to perform axial movement, and then driving the clutch to connect with the corresponding external spline to realize gear shift. In this way, the system can automatically select the appropriate gear combination, realize the efficient transmission of power and the switching of different transmission ratios, improve the convenience of the shift operation, reduce the complexity of the shift operation, and improve the safety of the shift operation.

[0094] Figure 3 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 3 . As Figure 3 shown, based on the Figure 1 and Figure 2 embodiments, the hydraulic gear shifting device will be described in detail.

[0095] The hydraulic gear shifting device further includes: a flange 900, the flange 900 is connected to the shifting oil cylinder 800 through a second screw 1000, and the other end of the shifting lever 700 is connected to the piston 801 in the shifting oil cylinder 800 through the flange 900.

[0096] Specifically, the flange 900 is fixedly connected to the shifting oil cylinder 800 through the second screw 1000. Its main function is to provide a stable connection interface to ensure that the other end of the shifting lever 700 can be reliably connected to the piston 801 in the shifting oil cylinder 800. Through this connection method, the flange 900 not only enhances the structural stability, but also ensures that the shifting lever 700 can accurately transmit the movement during the axial movement of the piston 801, thereby realizing the effective shifting operation of the clutch 300. This design helps to improve the overall performance and durability of the shifting device.

[0097] The technical effect of this embodiment is: by adding a flange and its connection to the shifting oil cylinder, the connection stability and reliability between the shifting lever and the piston are enhanced. This design effectively reduces the possible mechanical looseness or misalignment during the shifting process, thereby improving the accuracy and response speed of the shifting operation.

[0098] A first sealing ring 901 is provided on the flange 900, and the first sealing ring 901 is used to prevent the hydraulic oil in the shifting oil cylinder 800 from leaking.

[0099] Specifically, the first sealing ring 901 provided on the flange 900 plays a sealing role. This design prevents the hydraulic oil from leaking from the inside of the shifting oil cylinder 800 to the external environment, thereby ensuring the stability of the pressure in the hydraulic system and guaranteeing the accuracy and reliability of the shifting operation. In addition, this sealing measure can also prevent external impurities from entering the inside of the oil cylinder, protecting the cleanliness and normal operation of the hydraulic system.

[0100] The technical effect of this embodiment is: by providing a first sealing ring on the flange, the leakage of the hydraulic oil in the shifting oil cylinder is prevented, thereby improving the accuracy and reliability of the shifting operation, protecting the cleanliness inside the system, preventing external pollutants from entering, and thus extending the service life and maintenance cycle of the device.

[0101] The flange 900 is provided with a first wear-resistant ring 902, a first rotating packing ring 903 and a dust-proof ring 904. The first wear-resistant ring 902 is used to reduce the wear between the shift lever 700 and the flange 900. The first rotating packing ring 903 is used to prevent the hydraulic oil in the shift cylinder 800 from leaking. The dust-proof ring 904 is used to prevent impurities from entering the shift cylinder 800.

[0102] Specifically, the first wear-resistant ring 902, the first rotating packing ring 903 and the dust-proof ring 904 are integrated on the flange 900 to achieve multiple protections and functional optimizations. The first wear-resistant ring 902 reduces the wear between the shift lever 700 and the flange 900 by providing a low-friction contact surface, thereby extending the service life of the components. The first rotating packing ring 903 prevents the hydraulic oil from leaking out of the shift cylinder 800 through its sealing characteristics, ensuring the pressure stability of the hydraulic system and the reliability of the shift operation. The dust-proof ring 904 acts as a barrier to prevent external impurities and contaminants from entering the shift cylinder 800, protecting the cleanliness and normal operation of the system. These components work together to improve the durability and performance stability of the device.

[0103] The technical effect of this embodiment is that by introducing the first wear-resistant ring, the first rotating packing ring and the dust-proof ring into the shift system, the stability and accuracy of the shift operation are optimized. This optimization not only improves the durability and reliability of the system, but also enhances the fluency and response speed of the operation, thereby improving the performance efficiency and service life of the entire device.

[0104] The hydraulic gear shift device further includes: a shift ring 804. The other end of the shift lever 700 is provided with a concave groove. The shift ring 804 is provided with a protrusion. The concave groove on the shift lever 700 is connected to the protrusion on the shift ring 804. The shift ring 804 is connected to the piston 801.

[0105] Specifically, by connecting the concave groove on the shift lever 700 to the protrusion of the shift ring 804, a solid mechanical connection is formed. This design ensures that the movement of the shift lever 700 can be accurately transmitted to the shift ring 804 and further transmitted to the piston 801 connected thereto. At the same time, this design is also convenient for disassembly and maintenance. In this way, the axial movement generated by the hydraulic system can effectively drive the shift operation, ensuring the smoothness and accuracy of the shift process, and at the same time increasing the overall stability and durability of the structure.

[0106] The technical effect of this embodiment is that by setting the shift ring and a specific structure, the operation safety and reliability of the device are enhanced. This involves an improved fixing and locking mechanism to ensure that the key components remain stable during operation, preventing loosening or displacement. This design improves the overall performance of the device.

[0107] There is a fixing nut 805 outside the shifting ring 804, and a retaining ring 806 is arranged outside the fixing nut 805. The retaining ring 806 is connected to the piston 801. The fixing nut 805 is used to fix the shifting ring 804, and the retaining ring 806 is used to prevent the fixing nut 805 from loosening.

[0108] Specifically, the outside of the shifting ring 804 is equipped with a fixing nut 805, and a retaining ring 806 is further arranged outside the fixing nut 805. Through the fastening effect, the fixing nut 805 firmly fixes the shifting ring 804 in the required position to ensure that it will not be displaced during operation. The retaining ring 806 is connected to the piston 801 and functions to lock the fixing nut 805 to prevent it from loosening during vibration or long-term use. This multi-level fixing design not only ensures the stability and precise positioning of the shifting ring 804, but also improves the reliability and durability of the entire shifting mechanism, preventing failures or misoperations caused by nut loosening.

[0109] The technical effect of this embodiment is that by setting the fixing nut and the retaining ring, the sealing performance and durability of the device are improved. This includes optimized sealing ring or gasket configurations to effectively prevent the leakage of liquids or gases, thereby maintaining the pressure stability inside the system. At the same time, improved wear-resistant materials or structural designs reduce the friction and wear between key components and extend the service life of the equipment. This technical effect not only improves the reliability and efficiency of the device, but also reduces the maintenance frequency and cost.

[0110] There are a second wear-resistant ring 807 and a second rotating Grease ring 808 on the shifting piston 801. The second wear-resistant ring 807 is used to reduce the wear between the shifting piston 801 and the shifting oil cylinder 800, and the second rotating Grease ring 808 is used to prevent the hydraulic oil in the shifting oil cylinder 800 from leaking.

[0111] Specifically, the second wear-resistant ring 807 and the second rotating Grease ring 808 are integrated on the shifting piston 801 to achieve key protection and sealing functions. The second wear-resistant ring 807 reduces the friction and wear between the shifting piston 801 and the inner wall of the shifting oil cylinder 800 by providing a wear-resistant contact surface, thereby extending the service life of the component. The second rotating Grease ring 808 prevents the hydraulic oil from leaking from the inside of the shifting oil cylinder 800 through its excellent sealing performance, ensuring the pressure stability of the hydraulic system and the reliability of the shifting operation. Such a design not only improves the durability and performance stability of the device, but also maintains the overall efficiency and cleanliness of the hydraulic system.

[0112] The technical effect of this embodiment is that by introducing the second wear-resistant ring and the second rotating Grease ring, the efficiency and functionality of the device are enhanced. This includes optimized component arrangements and interaction methods to improve the response speed and operation smoothness of the system. Such a design not only improves the overall performance of the device, but also reduces the maintenance requirements and operating costs.

[0113] The shift lever 700 is provided with an oil guiding hole 703 for guiding gear oil to lubricate the shift lever 700.

[0114] Specifically, an oil guiding hole 703 is designed on the shift lever 700, which is used to guide gear oil to achieve lubrication of the shift lever 700. Through its precise positioning and size, the oil guiding hole 703 allows the gear oil to flow along the surface of the shift lever 700 to form a lubricating film. This lubrication not only reduces the friction and wear between the shift lever 700 and other components, thus extending its service life, but also ensures the smoothness and efficiency of the shifting operation. By maintaining the lubricated state, the oil guiding hole 703 helps to improve the performance stability and reliability of the entire device.

[0115] The technical effect of this embodiment is that by providing an oil guiding hole on the shift lever, the gear oil can be guided to flow to the surface of the shift lever, thereby achieving lubrication of the shift lever. This lubrication effect not only reduces the friction and wear of the shift lever during operation, improves the service life of the shifting device, but also ensures the smoothness and stability of the shifting process, and enhances the performance and reliability of the overall device.

[0116] Figure 4 Schematic structure of the hydraulic gear shifting device provided by the embodiment of the present application Figure 4 . As Figure 4 shown, based on the Figures 1 to 3 embodiment, the hydraulic gear shifting device will be described in detail.

[0117] One end of the shift lever 700 is provided with a round nut 701 and a thrust washer 702. The round nut 701 is used to fix the connection between the shift fork 600 and the shift lever 700, and the thrust washer 702 is used to prevent the round nut 701 from loosening.

[0118] Specifically, one end of the shift lever 700 is equipped with a round nut 701 and a thrust washer 702 to ensure the firmness and reliability of the connection. The round nut 701 firmly fixes the shift fork 600 on the shift lever 700 through fastening, ensuring that the shift fork 600 can accurately transmit the movement of the shift lever. The thrust washer 702 is located between the round nut 701 and the shift lever 700, playing a buffering and locking role to prevent the round nut 701 from loosening due to vibration or other factors during operation. This design not only ensures the reliable connection between the shift fork 600 and the shift lever 700, but also improves the stability and durability of the entire shifting device, preventing operation errors or mechanical failures caused by nut loosening.

[0119] The technical effect of this embodiment is that by setting a round nut and a thrust washer at one end of the shift lever, it effectively prevents the connection from loosening or falling off due to vibration or other external forces during the shifting process, ensuring the reliability and stability of the shifting operation, and thus improving the durability and safety of the entire device.

[0120] Figure 5 Structural schematic of the hydraulic gear shifting device provided by the embodiment of the present application Figure 5 As Figure 5 shown, on the basis of the Figures 1 to 4 embodiment, the hydraulic gear shifting device will be described in detail.

[0121] A guiding structure 303 is provided on the internal spline 302, and the guiding structure 303 is used to ensure that the clutch 300 maintains the correct moving direction when moving axially.

[0122] Specifically, the guiding structure 303 is designed on the internal spline 302, and its main function is to ensure that the clutch 300 maintains the correct moving direction when moving axially. The guiding structure 303 cooperates with the corresponding guiding groove or guiding surface to limit the lateral or rotational offset of the clutch 300, thereby ensuring its smooth movement along the axial path. This design not only improves the operation accuracy and reliability of the clutch, but also reduces the wear and potential failures caused by improper movement, thereby extending the service life and maintenance cycle of the device.

[0123] The technical effect of this embodiment is that by setting a guiding structure on the internal spline, it ensures that the clutch can maintain the correct moving direction when moving axially. This guiding structure effectively prevents the clutch from being skewed or stuck during the movement process, improves the connection accuracy and reliability between the clutch and the external spline, thus ensuring the accuracy and stability of the shifting operation, and improving the performance and service life of the entire hydraulic gear shifting device.

[0124] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydraulic gear shifting device, characterized in that, Including: Input shaft (100), output shaft (200), clutch (300), sector block (400), first screw (500), fork (600), shift lever (700) and shift oil cylinder (800); A first input gear (101) and a second input gear (102) are provided on the input shaft (100). A first external spline (103) is provided between the first input gear (101) and the second input gear (102). A second external spline (104) is provided on one side of the first input gear (101) close to the first external spline (103). A third external spline (105) is provided on one side of the second input gear (102) close to the first external spline (103); A first output gear (201) and a second output gear (202) are provided on the output shaft (200). The first output gear (201) meshes with the second input gear (102), and the second output gear (202) meshes with the first input gear (101); An annular groove (301) and an internal spline (302) are provided on the clutch (300). The first external spline (103) is connected to the clutch (300) through the internal spline (302). One end of the sector block (400) is connected to the clutch (300) through the annular groove (301). The other end of the sector block (400) is connected to one end of the fork (600) through the first screw (500). The other end of the fork (600) is connected to one end of the shift lever (700). The other end of the shift lever (700) is connected to a piston (801) in the shift oil cylinder (800); An oil inlet (802) and an oil return port (803) are provided on the shift oil cylinder (800); When the hydraulic gear shift device shifts gears, the oil inlet (802) and the oil return port (803) are used to switch the flow direction of the hydraulic oil to generate a pressure difference in the shift oil cylinder (800). The piston (801) is used to perform an axial movement according to the pressure difference, so that the shift lever (700) drives the fork (600) and the clutch (300) to perform an axial movement. The clutch (300) is used to connect with the second external spline (104) or the third external spline (105) according to the axial movement. When the clutch (300) is connected to the second external spline (104), the second external spline (104) is used to drive the first input gear (101) to rotate, so that the first input gear (101) drives the second output gear (202) to rotate. When the clutch (300) is connected to the third external spline (105), the third external spline (105) is used to drive the second input gear (102) to rotate, so that the second input gear (102) drives the first output gear (201) to rotate.

2. The hydraulic gear shifting device according to claim 1, wherein Also including: Flange (900), the flange (900) is connected to the shift cylinder (800) by a second screw (1000), and the other end of the shift lever (700) is connected to the piston (801) in the shift cylinder (800) through the flange (900).

3. The hydraulic gear shifting device according to claim 2, wherein, A first sealing ring (901) is provided on the flange (900), and the first sealing ring (901) is used to prevent the hydraulic oil in the shift cylinder (800) from leaking.

4. The hydraulic gear shifting device according to claim 2, characterized in that, A first wear-resistant ring (902), a first rotating Grease ring (903) and a dust-proof ring (904) are provided on the flange (900). The first wear-resistant ring (902) is used to reduce the wear between the shift lever (700) and the flange (900). The first rotating Grease ring (903) is used to prevent the hydraulic oil in the shift cylinder (800) from leaking. The dust-proof ring (904) is used to prevent impurities from entering the shift cylinder (800).

5. The hydraulic gear shifting device according to claim 1, characterized in that, It further includes: Shift ring (804). A concave groove is provided at the other end of the shift lever (700). A protrusion is provided on the shift ring (804). The concave groove on the shift lever (700) is connected to the protrusion on the shift ring (804). The shift ring (804) is connected to the piston (801).

6. The hydraulic gear shifting device according to claim 5, characterized in that, A fixing nut (805) is provided outside the shift ring (804). A retaining ring (806) is provided outside the fixing nut (805). The retaining ring (806) is connected to the piston (801). The fixing nut (805) is used to fix the shift ring (804), and the retaining ring (806) is used to prevent the fixing nut (805) from loosening.

7. The hydraulic gear shifting device according to claim 1, characterized in that, A second wear-resistant ring (807) and a second rotating Grease ring (808) are provided on the shift piston (801). The second wear-resistant ring (807) is used to reduce the wear between the shift piston (801) and the shift cylinder (800). The second rotating Grease ring (808) is used to prevent the hydraulic oil in the shift cylinder (800) from leaking.

8. The hydraulic gear shifting device according to claim 1, wherein, A round nut (701) and a thrust washer (702) are provided at one end of the shift lever (700). The round nut (701) is used to fix the connection between the shift fork (600) and the shift lever (700), and the thrust washer (702) is used to prevent the round nut (701) from loosening.

9. The hydraulic gear shifting device according to claim 1, characterized in that An oil guiding hole (703) is provided on the shift lever (700), and the oil guiding hole (703) is used to guide the gear oil to lubricate the shift lever (700).

10. The hydraulic gear shifting device according to claim 1, characterized in that, A guiding structure (303) is provided on the internal spline (302), and the guiding structure (303) is used to ensure that the clutch (300) maintains the correct moving direction during axial movement.

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