Speed regulation gear box

Abstract

The embodiment of the invention provides a speed regulation gear box, which relates to the technical field of mechanical engineering, and comprises a hydraulic variable displacement motor speed reducer, a shell, a first input shaft, a first output shaft, a clutch, a gear shifting fork, a gear shifting rod, a gear shifting oil cylinder and a fan-shaped block, the first input shaft is connected with the hydraulic variable displacement motor speed reducer and the cover plate; 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 first input shaft; a first output gear and a second output gear are arranged on the first 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 first input shaft is connected with the clutch, the clutch is connected with the gear shifting fork, the gear 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. And the rotating speed and the torque of the drilling machine power head connected with the speed regulation gear box can be regulated by controlling the speed regulation gear box, so that the cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of mechanical engineering, and particularly to a speed-regulating gearbox. Background Art

[0002] In the field of tunnel construction, the power head of a drilling rig is the core component of the rig. Different drilling parameters are required under different applications and geological conditions. For example, in soft soil layers, relatively low rotational speeds and high torques may be needed to prevent cave-ins and equipment damage; while in hard rock formations, higher rotational speeds and moderate torques may be required to improve drilling speed and efficiency. Therefore, the power head of a drilling rig must be capable of flexibly adjusting drilling parameters to adapt to different construction requirements and geological conditions, thereby optimizing the construction process.

[0003] In the prior art, in order to enable the power head of a drilling rig to have the ability to flexibly adjust drilling parameters, different power output modes can be achieved by adopting a method of connecting multiple motors in series and parallel. By switching gear pairs with large and small transmission ratios, the power head can provide a wide range of rotational speed adjustment and large torque output under different working conditions. This design allows operators to flexibly adjust the performance of the power head according to specific geological conditions and construction requirements to optimize drilling efficiency.

[0004] However, the prior art has the problem of high cost. The configuration of multiple motors increases the cost because high-quality and high-performance motors are required to meet the needs under different working conditions. Secondly, the complex transmission system and gear pair switching mechanism require precise manufacturing processes and high-quality materials, which further increase the manufacturing cost. All these factors combined increase the cost of this power head design. Summary of the Invention

[0005] An embodiment of this application provides a speed-regulating gearbox to solve the problem of high cost of the power head of a drilling rig in the prior art.

[0006] In a first aspect, this application provides a hydraulic gear shifting device, which includes: a hydraulic variable motor reducer, a housing, a first input shaft, a first output shaft, a clutch, a shifting fork, a shifting rod, a shifting oil cylinder, a sector block, and a cover plate;

[0007] The hydraulic variable motor reducer is arranged on the housing, the hydraulic variable motor reducer is connected to one end of the first input shaft, and the other end of the first input shaft is connected to the cover plate through the housing;

[0008] A first input gear and a second input gear are provided on the first input shaft. A first external spline is provided between the first input gear and the second input gear. A second external spline is provided between the first input gear and the first external spline. A third external spline is provided between the second input gear and the first external spline;

[0009] One end of the first output shaft is connected to the housing, and the other end of the first output shaft is connected to the cover plate through the housing. A first output gear and a second output gear are provided on the first output shaft. The first output gear meshes with the second input gear, and the second output gear meshes with the first input gear;

[0010] The first input shaft is connected to the clutch. The clutch is connected to the shift fork through the sector block. The shift fork is connected to the shift lever. The shift lever is connected to the shift oil cylinder through the housing;

[0011] An oil inlet and an oil outlet are provided on the shift oil cylinder;

[0012] The cover plate is provided on the housing, and the cover plate is used to close the housing;

[0013] When the speed-regulating gearbox is working, the hydraulic variable motor reducer is used to generate a driving force and transmit the driving force to the first input shaft. The first input shaft is used to transmit the driving force to the first output shaft. The first output shaft is used to transmit the driving force to an external device. The oil inlet and the oil outlet are used to switch the flow direction of the hydraulic oil in the shift oil cylinder to generate a pressure difference in the shift oil cylinder. The shift lever is used to perform an axial movement according to the pressure difference to drive 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.

[0014] In a possible design, an oil suction port, a first oil guiding hole, and a second oil guiding hole are provided on the cover plate;

[0015] A gear pump, a gear oil distributor, and an oil return port are provided on the housing;

[0016] The oil suction port is connected to the gear pump, the gear pump is connected to the gear oil distributor, the gear oil distributor is respectively connected to the oil return port, the first oil guiding hole and the second oil guiding hole, the first oil guiding hole is connected to the first input shaft, and the second oil guiding hole is connected to the first output shaft; wherein, the oil suction port is used for sucking the gear oil, the gear pump is used for transporting the gear oil, the gear oil distributor is used for distributing the gear oil, the first oil guiding hole is used for transmitting the gear oil to the first input shaft to reduce the temperature of the first input shaft, and the second oil guiding hole is used for transmitting the gear oil to the first output shaft to reduce the temperature of the first output shaft.

[0017] In a possible design, a second input shaft is provided on the gear pump, the second input shaft is connected to a cooling gear, and the cooling gear meshes with the first input gear;

[0018] A first internal spline is provided on the clutch, and the first external spline is connected to the clutch through the first internal spline.

[0019] In a possible design, an observation port is provided on the housing, and the observation port is used for displaying the internal condition of the speed regulation gearbox.

[0020] In a possible design, a second internal spline and a threaded hole are provided on the first output shaft, and both the second internal spline and the threaded hole are used for connecting external devices.

[0021] In a possible design, a first needle roller bearing and a second needle roller bearing are provided on the first input shaft, the first input shaft is connected to the first input gear through the first needle roller bearing, and the first input shaft is connected to the second input gear through the second needle roller bearing.

[0022] In a possible design, a first roller bearing and a second roller bearing are provided on the housing, and a third roller bearing and a fourth roller bearing are provided on the cover plate;

[0023] The first roller bearing is connected to one end of the first input shaft, the second roller bearing is connected to one end of the first output shaft, the third roller bearing is connected to the other end of the first input shaft, and the fourth roller bearing is connected to the other end of the first output shaft; the first roller bearing and the third roller bearing are used for bearing the radial force received by the first input shaft, and the second roller bearing and the fourth roller bearing are used for bearing the axial force received by the first output shaft.

[0024] In a possible design, a first skeleton oil seal and a second skeleton oil seal are provided on the housing, and a third skeleton oil seal and a fourth skeleton oil seal are provided on the cover plate;

[0025] The first skeleton oil seal is arranged on the side of the first roller bearing away from the housing, the second skeleton oil seal is arranged on the side of the second roller bearing away from the housing, the third skeleton oil seal is arranged on the side of the third roller bearing away from the housing, the fourth skeleton oil seal is arranged on the side of the fourth roller bearing away from the housing, and the first skeleton oil seal, the second skeleton oil seal, the third skeleton oil seal and the fourth skeleton oil seal are all used to seal the gear oil in the housing.

[0026] In a possible design, a third needle roller bearing is arranged between the second roller bearing and the second skeleton oil seal, a fourth needle roller bearing is arranged between the fourth roller bearing and the fourth skeleton oil seal, the third needle roller bearing is connected to one end of the first output shaft and the housing, and the fourth needle roller bearing is connected to the other end of the first output shaft and the cover plate.

[0027] In a possible design, a first positioning and adjusting block is arranged between the first input gear and the first roller bearing, the first positioning and adjusting block is connected to one end of the first input shaft and the housing, a second positioning and adjusting block is arranged between the second input gear and the third roller bearing, the second positioning and adjusting block is connected to the other end of the first input shaft and the cover plate, and both the first positioning and adjusting block and the second positioning and adjusting block are used to prevent the first input shaft from moving.

[0028] The present application provides a speed-regulating gearbox, comprising: a hydraulic variable motor reducer, a housing, a first input shaft, a first output shaft, a clutch, a shift fork, a shift lever, a shift cylinder, a sector block and a cover plate; the hydraulic variable motor reducer is arranged on the housing, the hydraulic variable motor reducer is connected to one end of the first input shaft, and the other end of the first input shaft is connected to the cover plate through the housing; a first input gear and a second input gear are arranged on the first input shaft, a first external spline is arranged between the first input gear and the second input gear, a second external spline is arranged between the first input gear and the first external spline, and a third external spline is arranged between the second input gear and the first external spline; one end of the first output shaft is connected to the housing, and the other end of the first output shaft is connected to the cover plate through the housing. A first output gear and a second output gear are arranged on the first output shaft. The first output gear meshes with the second input gear, and the second output gear meshes with the first input gear; the first input shaft is connected to the clutch, the clutch is connected to the shift fork through the sector block, the shift fork is connected to the shift lever, and the shift lever is connected to the shift cylinder through the housing; an oil inlet and an oil outlet are arranged on the shift cylinder; the cover plate is arranged on the housing, and the cover plate is used to seal the housing; when the speed-regulating gearbox is working, the hydraulic variable motor reducer is used to generate a driving force and transmit the driving force to the first input shaft, the first input shaft is used to transmit the driving force to the first output shaft, the first output shaft is used to transmit the driving force to an external device, the oil inlet and the oil outlet are used to switch the flow direction of the hydraulic oil in the shift cylinder to generate a pressure difference in the shift cylinder, the shift lever is used to perform an axial movement according to the pressure difference to drive the shift 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. The speed-regulating gearbox of the embodiment of the present application is provided with a variable motor reducer and a gear transmission ratio switching mechanism, which reduces the cost of the power head of the drill rig. The variable motor reducer can provide variable output speed and torque. By adjusting the displacement of the hydraulic motor, the rotation speed of the output shaft can be changed, so as to achieve different power output requirements. The gear transmission ratio switching mechanism enables the gearbox to switch between different gear transmission ratios by using a combination of a clutch, a shift fork and a shift cylinder, thereby changing the meshing relationship between the input gear and the output gear.This mechanical switching mechanism allows operation at different gear ratios, thereby further expanding the speed regulation range. In summary, this design can meet the diverse speed and torque requirements of the drill rig power head, eliminating the need for multiple motors in the drill rig power head and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Structural schematic of the speed regulation gearbox provided by the embodiment of the present application Figure 1 ;

[0031] Figure 2 Structural schematic of the speed regulation gearbox provided by the embodiment of the present application Figure 2 ;

[0032] Figure 3 Structural schematic of the speed regulation gearbox provided by the embodiment of the present application Figure 3 ;

[0033] Figure 4 Structural schematic of the speed regulation gearbox provided by the embodiment of the present application Figure 4 ;

[0034] Figure 5 Structural schematic of the speed regulation gearbox provided by the embodiment of the present application Figure 5 。

[0035] Description of the reference numerals:

[0036] 100 - Hydraulic variable motor reducer

[0037] 200 - Housing

[0038] 201 - Gear pump

[0039] 2011 - Second input shaft

[0040] 202 - Gear oil distributor

[0041] 203 - Oil return port

[0042] 204 - Observation port

[0043] 205 - First roller bearing

[0044] 206 - Second roller bearing

[0045] 207 - First skeleton oil seal;

[0046] 208 - Second skeleton oil seal;

[0047] 209 - Third needle roller bearing;

[0048] 210 - Fourth needle roller bearing;

[0049] 211 - First positioning adjustment block;

[0050] 212 - Second positioning adjustment block;

[0051] 300 - First input shaft;

[0052] 301 - First input gear;

[0053] 302 - Second input gear;

[0054] 303 - First external spline;

[0055] 304 - Second external spline;

[0056] 305 - Third external spline;

[0057] 306 - First needle roller bearing;

[0058] 307 - Second needle roller bearing;

[0059] 400 - First output shaft;

[0060] 401 - First output gear;

[0061] 402 - Second output gear;

[0062] 403 - Second internal spline;

[0063] 404 - Threaded hole;

[0064] 500 - Clutch;

[0065] 501 - First internal spline;

[0066] 600 - Shift fork;

[0067] 700 - Shift lever;

[0068] 800 - Shift cylinder;

[0069] 801 - Oil inlet;

[0070] 802 - Oil outlet;

[0071] 900 - Sector block;

[0072] 1000 - Cover plate;

[0073] 1001 - Oil suction port;

[0074] 1002 - First oil guiding hole;

[0075] 1003 - Second oil guiding hole;

[0076] 1004 - Third roller bearing;

[0077] 1005 - Fourth roller bearing;

[0078] 1006 - Third skeleton oil seal;

[0079] 1007 - Fourth skeleton oil seal;

[0080] 1100 - Cooling gear. Detailed implementation manner

[0081] 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 implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0082] In the embodiments of the present application, the same or similar items with basically the same functions and effects are distinguished by using words such as "first" and "second". Those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" 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 represent 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. Exactly speaking, using 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" means two or more.

[0083] 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 speed regulation gearbox provided in the embodiments of the present application is only an example, and the speed regulation gearbox may further include more or less content.

[0084] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0085] Hydraulic variable motor reducer: It is a device that combines the functions of hydraulic variable motor and reducer, which is used to convert hydraulic energy into mechanical energy and adjust the output speed and torque. The hydraulic variable motor adjusts the output speed by changing the displacement, while the reducer reduces the speed and increases the torque through gear transmission. This combination is widely used in industrial equipment and mechanical systems that require precise control of speed and torque, such as construction machinery, ship propulsion systems and wind turbines.

[0086] Drilling head: It is a key component in the drilling rig, responsible for transmitting power to the drill pipe to achieve drilling operations. It is usually driven by an electric motor or a hydraulic motor, which transmits the rotational motion to the drill pipe through a gear or belt system, so that the drill bit can drill holes in the ground or rock. The design and performance of the power head directly affect the efficiency and drilling capacity of the drilling rig.

[0087] Drilling rig: It is a mechanical device used to drill holes in the ground or rock. It is widely used in the exploration and exploitation of oil, natural gas, geothermal resources, as well as the construction of water wells, mines and building foundations. The drilling rig drives the drill rod and drill bit through the power system to achieve drilling operations. Its type and size can vary according to specific application requirements, including land drilling rigs, offshore drilling rigs and portable drilling rigs.

[0088] Shift fork: It is a key component in the transmission, used to switch between different gears to achieve the shifting operation. It usually works with the shift lever and synchronizer to change the power transmission path by shifting the gear set, thereby adjusting the speed and torque output of the equipment. The precise operation of the shift fork is essential to ensure a smooth and efficient shifting process.

[0089] Shifter: A control device in a transmission system that allows the user to select and switch between different gears to adjust the speed and power output of the equipment. The shifter is connected to the transmission and controls the engagement and disengagement of the gears mechanically or electronically.

[0090] Shift cylinder: It is a component in the hydraulic control system, usually used in automatic transmissions or heavy machinery to achieve gear shifting operations. It pushes the piston through hydraulic pressure, which in turn drives the shift mechanism to engage or disengage the gears, thereby changing the transmission ratio of the equipment.

[0091] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying 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 invention as detailed in the appended claims.

[0092] The technical solution of the present application 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 in conjunction with the accompanying drawings.

[0093] To clearly understand the technical solution of the present application, the solutions of the prior art will be introduced in detail first. In the field of tunnel construction, the drill power head of a drill rig needs to have the ability to flexibly adjust drilling parameters to meet the changing requirements of different construction needs and geological conditions. To achieve this flexibility, a method of connecting multiple motors in series and parallel is usually adopted. This design allows the power head to adjust the power output mode by changing the combination of motors, thereby achieving precise control of drilling parameters. By connecting different numbers of motors in series or parallel, the rotational speed and torque of the power head output can be flexibly adjusted without changing the overall structure of the equipment, meeting the construction requirements under different geological conditions.

[0094] However, the drill power head of the prior art has the problem of high cost. Due to the complex design of connecting multiple motors in series and parallel in the drill power head of the prior art, the manufacturing and maintenance costs are relatively high. The use of multiple motors not only increases the initial cost of the equipment but also increases the complexity of the system, thereby increasing the failure rate and maintenance difficulty. In addition, the configuration of multiple motors requires a more precise control system to manage its power output mode, which further increases the overall cost of the equipment. These factors combined make the drill power head of the prior art costly.

[0095] Therefore, in view of the problem of high cost of the drill power head in the prior art, it is found in the research that to solve this problem, the manufacturing and maintenance costs can be reduced by optimizing the motor configuration and simplifying the control system design to reduce the number of components and complexity: ① The drill power head can be connected to a gearbox, and the rotational speed of the drill power head can be controlled by adjusting the rotational speed of the gearbox. ② The combination of a hydraulic cylinder, a shift fork, and a clutch can be used to achieve automatic gear shifting. Through this integrated shifting mechanism, the power output mode can be flexibly adjusted without increasing additional complexity, adapting to different construction needs, and thus reducing the cost of the equipment.

[0096] Specifically, the power head of the drill can be directly connected to the gearbox, and by adjusting the speed of the gearbox, the speed of the power head of the drill can be flexibly controlled to achieve performance output under different working conditions. In addition, a combined design of a hydraulic cylinder, a shifting fork, and a clutch is adopted to achieve automatic gear shifting and provide an integrated shifting mechanism. This design can not only flexibly adjust the power output mode without increasing the system complexity, but also adapt to different construction requirements, significantly reducing the manufacturing and maintenance costs of the equipment.

[0097] The speed-regulating gearbox of the embodiment of the present application is provided with a variable motor reducer and a gear transmission ratio switching mechanism. The variable motor reducer can provide variable output speed and torque. By adjusting the displacement of the hydraulic motor, the speed of the output shaft can be changed, so as to achieve different power output requirements. The gear transmission ratio switching mechanism enables the gearbox to switch between different gear transmission ratios through the combination of a clutch, a shifting fork, and a shifting oil cylinder. The clutch can switch the connection between the second external spline and the third external spline, thereby changing the meshing relationship between the input gear and the output gear. This mechanical switching mechanism allows operation at different gear ratios, further expanding the speed regulation range. In summary, this design meets the diverse speed and torque requirements of the power head of the drill, and the power head of the drill does not need to be equipped with multiple motors, reducing costs.

[0098] Based on the above creative findings, the technical solution of the present application is proposed.

[0099] The embodiments of the present application will be introduced below with reference to the accompanying drawings of the specification.

[0100] Figure 1 Structural schematic of the speed-regulating gearbox provided by the embodiment of the present application Figure 1 。 Figure 2 Structural schematic of the speed-regulating gearbox provided by the embodiment of the present application Figure 2 。 Figure 3 Structural schematic of the speed-regulating gearbox provided by the embodiment of the present application Figure 3 。 Figure 4 Structural schematic of the speed-regulating gearbox provided by the embodiment of the present application Figure 4 。As Figures 1 to 4 shown, in this embodiment, the speed-regulating gearbox includes: a hydraulic variable motor reducer 100, a housing 200, a first input shaft 300, a first output shaft 400, a clutch 500, a shifting fork 600, a shifting lever 700, a shifting oil cylinder 800, a sector block 900, and a cover plate 1000.

[0101] Specifically, the hydraulic variable motor reducer 100 is used to generate driving force and transmit it to the first input shaft 300, and it can be a combination of an electric servo motor and a reducer, or a combination of a permanent magnet synchronous motor and a controller; the housing 200 is a structural component for supporting and protecting internal components; the first input shaft 300 is a rotating shaft for transmitting the driving force of the hydraulic variable motor reducer 100 to the first output shaft 400; the first output shaft 400 is another rotating shaft for transmitting the driving force to external equipment; the clutch 500 is a mechanical device for switching connections between different external splines to change the transmission path; the shift fork 600 is a mechanical component for shifting gears, and the axial movement of the clutch 500 is achieved through the movement of the shift lever 700; the shift lever 700 is a control lever for axial movement according to the pressure difference in the shift cylinder 800, thereby driving the shift fork 600; the shift cylinder 800 is a hydraulic device for switching the flow direction of hydraulic oil through the oil inlet 801 and the oil return port 203 to generate a pressure difference; the sector block 900 is a connecting component for connecting the clutch 500 and the shift fork 600.

[0102] The hydraulic variable motor reducer 100 is provided on the housing 200, and the hydraulic variable motor reducer 100 is connected to one end of the first input shaft 300, and the other end of the first input shaft 300 is connected to the cover plate 1000 through the housing 200.

[0103] Specifically, the hydraulic variable motor reducer 100 is fixed on the housing 200 through mechanical connection or installation structure, and its output end is connected to one end of the first input shaft 300 to transmit the generated driving force to the first input shaft 300. The other end of the first input shaft 300 is connected to the cover plate 1000 through the housing 200 to ensure its stability and centering during rotation. This configuration is used to effectively transmit the driving force generated by the hydraulic variable motor reducer 100 to the first input shaft 300 and further transmit it to other components of the gearbox through this shaft, thereby realizing the transmission and speed change functions of the driving force.

[0104] The first input shaft 300 is provided with a first input gear 301 and a second input gear 302. There is a first external spline 303 between the first input gear 301 and the second input gear 302. There is a second external spline 304 between the first input gear 301 and the first external spline 303. There is a third external spline 305 between the second input gear 302 and the first external spline 303.

[0105] Specifically, two input gears are mounted on the first input shaft 300: the first input gear 301 and the second input gear 302. They are respectively fixedly connected to the first input shaft 300 through spline connections. The first external spline 303 is located between the first input gear 301 and the second input gear 302, allowing the clutch 500 to switch connections between these two gears. The second external spline 304 between the first input gear 301 and the first external spline 303, and the third external spline 305 between the second input gear 302 and the first external spline 303 provide different connection positions, enabling the clutch 500 to selectively connect to the second external spline 304 or the third external spline 305. This configuration is used to achieve different transmission paths in order to change the transmission ratio under different working conditions, thereby realizing the speed change function.

[0106] One end of the first output shaft 400 is connected to the housing 200, and the other end of the first output shaft 400 is connected to the cover plate 1000 through the housing 200. The first output shaft 400 is provided with a first output gear 401 and a second output gear 402. The first output gear 401 meshes with the second input gear 302, and the second output gear 402 meshes with the first input gear 301.

[0107] Specifically, the first output shaft 400 is connected to the housing 200 at one end and to the cover plate 1000 through the housing 200 in the form of bearings or other support structures to ensure its stability during rotation. Two output gears are mounted on the first output shaft 400: the first output gear 401 and the second output gear 402. The first output gear 401 meshes with the second input gear 302, while the second output gear 402 meshes with the first input gear 301. This gear meshing relationship realizes different paths for power transmission from the first input shaft 300 to the first output shaft 400, allowing the transmission ratio to be changed according to the selection of the clutch 500, thereby achieving different output speeds and torques to adapt to different operating requirements.

[0108] The first input shaft 300 is connected to the clutch 500. The clutch 500 is connected to the shift fork 600 through the sector block 900. The shift fork 600 is connected to the shift lever 700. The shift lever 700 is connected to the shift oil cylinder 800 through the housing 200.

[0109] Specifically, the first input shaft 300 is connected to the clutch 500 through a mechanical connection, allowing the clutch to switch connections between different external splines. The clutch 500 is connected to the shift fork 600 through the sector block 900. The sector block 900 provides a mechanical connection point, enabling the shift fork 600 to control the axial movement of the clutch 500. The shift fork 600 is connected to the shift lever 700, and the shift lever 700 extends through the housing 200 and is connected to the shift oil cylinder 800. The shift oil cylinder 800 hydraulically controls the axial movement of the shift lever 700, using the pressure difference of the hydraulic oil to push the shift lever 700, thereby driving the shift fork 600 and the clutch 500 to move axially. This configuration is used to achieve the gear shifting function of the gearbox, by changing the connection position of the clutch 500 to select different transmission paths and transmission ratios to adapt to different operating conditions and requirements.

[0110] The shift oil cylinder 800 is provided with an oil inlet 801 and an oil outlet 802.

[0111] Specifically, the shift oil cylinder 800 is designed with two hydraulic interfaces: an oil inlet 801 and an oil outlet 802. These two interfaces are used to connect the pipelines of the hydraulic system. The oil inlet 801 allows the hydraulic oil to enter the shift oil cylinder 800, thereby generating pressure inside the shift oil cylinder 800 to push the shift lever 700 to move axially. The oil outlet 802 is used for the discharge of the hydraulic oil, enabling the pressure inside the shift oil cylinder 800 to be released or reverse movement to be achieved. This configuration regulates the pressure inside the shift oil cylinder 800 by controlling the inflow and outflow of the hydraulic oil, thereby controlling the movement of the shift lever 700, and further achieving precise control of the shift fork 600 and the clutch 500 to select different transmission paths and realize the speed change function.

[0112] The cover plate 1000 is provided on the housing 200, and the cover plate 1000 is used to enclose the housing 200.

[0113] Specifically, the cover plate 1000 can be fixed to the housing 200 by designing specific connection mechanisms such as screws, snaps or hinges, etc., to ensure its stable installation. This connection method can provide a reliable closed structure to prevent the influence of the external environment on the inside of the housing 200, while allowing the cover plate 1000 to be easily opened or removed when needed for maintenance or repair. This design not only improves the durability and safety of the equipment.

[0114] When the speed-regulating gearbox is working, the hydraulic variable motor reducer 100 is used to generate a driving force and transmit the driving force to the first input shaft 300. The first input shaft 300 is used to transmit the driving force to the first output shaft 400. The first output shaft 400 is used to transmit the driving force to an external device. The oil inlet 801 and the oil outlet 802 are used to switch the flow direction of the hydraulic oil in the shift cylinder 800 to generate a pressure difference in the shift cylinder 800. The shift lever 700 is used to perform an axial movement according to the pressure difference to drive the shift fork 600 and the clutch 500 to perform an axial movement. The clutch 500 is used to connect with the second external spline 304 or the third external spline 305 according to the axial movement. When the clutch 500 is connected with the second external spline 304, the second external spline 304 is used to drive the first input gear 301 to rotate, so that the first input gear 301 drives the second output gear 402 to rotate. When the clutch 500 is connected with the third external spline 305, the third external spline 305 is used to drive the second input gear 302 to rotate, so that the second input gear 302 drives the first output gear 401 to rotate.

[0115] A speed-regulating gearbox provided in this embodiment generates and transmits a driving force through a hydraulic variable motor reducer, and realizes the functions of speed change and gear shift by using a series of mechanical connections and gear meshing. The hydraulic variable motor reducer transmits the driving force to the first input shaft. The first input shaft is connected to the first output shaft through different gear and external spline configurations, so as to realize different transmission paths. The clutch is connected to the shift cylinder through a sector block, a shift fork and a shift lever. The shift cylinder controls the movement of the shift lever through hydraulic pressure, and then controls the connection position of the clutch to realize different transmission ratios and output speeds. This design is used to provide flexible speed and torque adjustment under different operating conditions. The speed-regulating gearbox achieves the following technical effects: The speed-regulating gearbox can output multiple speeds and torques. By connecting the drilling rig power head to the speed-regulating gearbox, it can obtain the speeds and torques under multiple working conditions, reducing the need for multiple motors, thereby reducing the cost of the drilling rig power head. At the same time, the gear transmission ratio switching mechanism reduces the dependence on complex transmission systems and precision manufacturing processes by simplifying the mechanical structure, further reducing the cost. In summary, this design meets the diverse speed and torque requirements of the drilling rig power head. The drilling rig power head no longer needs to be equipped with multiple motors, reducing the cost of the drilling rig power head.

[0116] In a possible design, the cover plate 1000 is provided with an oil suction port 1001, a first oil guide hole 1002 and a second oil guide hole 1003.

[0117] Specifically, the oil suction port 1001, the first oil guiding hole 1002, and the second oil guiding hole 1003 can be set by opening corresponding channels and interfaces on the cover plate 1000. Such a design can effectively provide lubrication and cooling for the input shaft and the output shaft, reduce their operating temperatures, thereby improving the operating efficiency and service life of the gearbox, and reducing mechanical wear caused by overheating.

[0118] A gear pump 201, a gear oil distributor 202, and an oil return port 203 are provided on the housing 200.

[0119] Specifically, the gear pump 201, the gear oil distributor 202, and the oil return port 203 can be integrated in the structural design of the housing 200. These components are fixedly installed inside the housing 200 to form a compact oil management system. The gear pump 201 is responsible for pumping oil from the oil suction port 1001 and pressurizing and delivering it to the gear oil distributor 202. The gear oil distributor 202 then distributes the oil to each part that requires lubrication and cooling, while the oil return port 203 is used to collect and return the excess or recycled oil to the system. Such an integrated design not only saves space but also improves the efficiency and reliability of the lubrication system, ensuring that the gearbox is fully lubricated and cooled during operation.

[0120] The oil suction port 1001 is connected to the gear pump 201, the gear pump 201 is connected to the gear oil distributor 202, the gear oil distributor 202 is respectively connected to the oil return port 203, the first oil guiding hole 1002, and the second oil guiding hole 1003. The first oil guiding hole 1002 is connected to the first input shaft 300, and the second oil guiding hole 1003 is connected to the first output shaft 400.

[0121] Specifically, the oil suction port 1001 can be connected to the gear pump 201 through a pipeline or an internal channel. The gear pump 201 is then connected to the gear oil distributor 202 through a pipeline. The gear oil distributor 202 is connected to the oil return port 203, the first oil guiding hole 1002, and the second oil guiding hole 1003 through their respective channels. The first oil guiding hole 1002 and the second oil guiding hole 1003 are respectively connected to the first input shaft 300 and the first output shaft 400. This design realizes a closed oil circuit circulation system, ensuring that the gear oil can be effectively delivered to the input shaft and the output shaft for lubrication and cooling, improving the lubrication efficiency and thermal management ability of the system, reducing the wear of mechanical components, and thus enhancing the overall performance and reliability of the gearbox. Among them, the oil suction port 1001 is used to suck in the gear oil, the gear pump 201 is used to transport the gear oil, the gear oil distributor 202 is used to distribute the gear oil, the first oil guiding hole 1002 is used to transmit the gear oil to the first input shaft 300 to reduce the temperature of the first input shaft 300, and the second oil guiding hole 1003 is used to transmit the gear oil to the first output shaft 400 to reduce the temperature of the first output shaft 400.

[0122] The technical effect of this embodiment is as follows: By providing an oil suction port, an oil guide hole, a gear pump, a gear oil distributor, and an oil return port on the cover plate and the housing, an efficient oil circulation system is formed. This system can continuously provide lubrication and cooling for the key components in the gearbox, reduce the operating temperatures of the input shaft and the output shaft, and reduce friction and wear, thereby improving the operating efficiency and reliability of the gearbox.

[0123] In a possible design, the housing 200 is provided with an observation port 204, and the observation port 204 is used to display the internal condition of the speed regulation gearbox.

[0124] Specifically, the main function of the observation port 204 is to provide a visible window so that users can directly observe the internal operation of the gearbox. The observation port 204 is usually made of transparent materials such as tempered glass or transparent plastic to ensure that it can withstand the internal pressure and external environment, while providing a clear view. Through the observation port 204, users can monitor the gear meshing inside the gearbox and the operation of other key components in real time, so as to discover potential problems in a timely manner. This design helps to improve the maintenance efficiency of the equipment, reduce the downtime, and extend the service life of the gearbox.

[0125] The technical effect of this embodiment is as follows: The observation port provides a directly visible window, enabling users to monitor the internal operating state of the speed regulation gearbox in real time. This design improves the maintainability and safety of the equipment. Through the observation port, users can quickly identify and diagnose abnormal conditions of the internal components, so that appropriate maintenance measures can be taken at the initial stage of the problem, reducing unexpected downtime and maintenance costs.

[0126] In a possible design, the first output shaft 400 is provided with a second internal spline 403 and a threaded hole 404, and both the second internal spline 403 and the threaded hole 404 are used to connect external devices.

[0127] Specifically, the first output shaft 400 is provided with a second internal spline 403 and a threaded hole 404, and these two structures are used to achieve mechanical connection with external devices. The second internal spline 403 can cooperate with the corresponding external spline shaft of the external device to achieve torque transmission and synchronous rotational movement. The threaded hole 404 is used to fix the external device to the first output shaft 400 through bolts or screws to ensure the stability and safety of the connection. This design allows the speed regulation gearbox to effectively transmit its output power to various external mechanical equipment to meet the requirements of different application scenarios.

[0128] The technical effect of this embodiment is as follows: By providing a second internal spline and a threaded hole on the first output shaft, a flexible and reliable connection method with external devices is achieved. The second internal spline provides a standardized interface for efficiently transmitting torque and rotational motion, while the threaded hole ensures the mechanical connection's stability and anti-vibration performance. This design not only improves the applicability and compatibility of the speed regulation gearbox, enabling seamless integration with a variety of external devices, but also enhances the overall stability and reliability of the system.

[0129] In a possible design, a first needle bearing 306 and a second needle bearing 307 are provided on the first input shaft 300. The first input shaft 300 is connected to the first input gear 301 through the first needle bearing 306, and the first input shaft 300 is connected to the second input gear 302 through the second needle bearing 307.

[0130] Specifically, the first needle bearing 306 enables the first input shaft 300 to freely rotate within the first input gear 301 while providing radial support to reduce friction and wear. The second needle bearing 307 enables the first input shaft 300 to freely rotate within the second input gear 302 and provides corresponding radial support. This design not only improves the mechanical efficiency and service life of the gearbox but also ensures smooth transmission between the input shaft and the input gear, reducing energy loss and noise.

[0131] The technical effect of this embodiment is as follows: By providing a first needle bearing and a second needle bearing on the first input shaft, efficient support and low-friction connection between the input shaft and the input gear are achieved. This design effectively reduces friction and wear between rotating components, enhancing the mechanical efficiency and durability of the gearbox.

[0132] In a possible design, a first roller bearing 205 and a second roller bearing 206 are provided on the housing 200, and a third roller bearing 1004 and a fourth roller bearing 1005 are provided on the cover plate 1000.

[0133] Specifically, the first roller bearing 205 and the second roller bearing 206 provided on the housing 200, and the third roller bearing 1004 and the fourth roller bearing 1005 provided on the cover plate, support and stabilize these shafts by connecting to both ends of the first input shaft 300 and the first output shaft 400 respectively. This design effectively reduces the offset and wear of the shafts caused by radial and axial forces during operation, thereby improving the overall operating stability and service life of the gearbox.

[0134] The first roller bearing 205 is connected to one end of the first input shaft 300, the second roller bearing 206 is connected to one end of the first output shaft 400, the third roller bearing 1004 is connected to the other end of the first input shaft 300, and the fourth roller bearing 1005 is connected to the other end of the first output shaft 400; the first roller bearing 205 and the third roller bearing 1004 are used to bear the radial force received by the first input shaft 300, and the second roller bearing 206 and the fourth roller bearing 1005 are used to bear the axial force received by the first output shaft 400.

[0135] Specifically, bearing seats can be designed and machined in the internal structures of the housing and the cover plate to install the roller bearings respectively. The first roller bearing 205 and the third roller bearing 1004 are respectively connected to both ends of the first input shaft 300, while the second roller bearing 206 and the fourth roller bearing 1005 are connected to both ends of the first output shaft 400. This configuration ensures the stability of the shaft during rotation by providing support at both ends of the shaft, reduces shaft offset and vibration caused by radial and axial forces, improves the running smoothness of the gearbox, avoids mechanical wear and failure problems, and thus extends the service life of the equipment.

[0136] The technical effect of this embodiment is that by respectively arranging roller bearings on the housing and the cover plate, effective support and stability are provided for the first input shaft and the first output shaft. This design effectively reduces the offset and wear of the shaft caused by the force during operation, improves the running smoothness and reliability of the gearbox, and further extends the service life of the equipment.

[0137] In a possible design, a first skeleton oil seal 207 and a second skeleton oil seal 208 are provided on the housing 200, and a third skeleton oil seal 1006 and a fourth skeleton oil seal 1007 are provided on the cover plate 1000.

[0138] Specifically, by installing skeleton oil seals at key positions on the housing 200 and the cover plate 1000, these oil seals can effectively seal the gap between the bearing and the shaft, prevent the gear oil from leaking into the external environment, and also prevent external dust and impurities from entering the inside of the gearbox. This design not only improves the sealing performance of the gearbox, but also extends the service life of the equipment and reduces the maintenance frequency and cost.

[0139] The first skeleton oil seal 207 is provided on the side of the first roller bearing 205 away from the housing 200, the second skeleton oil seal 208 is provided on the side of the second roller bearing 206 away from the housing 200, the third skeleton oil seal 1006 is provided on the side of the third roller bearing 1004 away from the housing 200, and the fourth skeleton oil seal 1007 is provided on the side of the fourth roller bearing 1005 away from the housing 200. The first skeleton oil seal 207, the second skeleton oil seal 208, the third skeleton oil seal 1006, and the fourth skeleton oil seal 1007 are all used to seal the gear oil inside the housing 200.

[0140] Specifically, the skeleton oil seals are installed on the sides of the respective roller bearings away from the housing 200, aiming to form a sealing barrier between the bearings and the external environment. By setting the oil seals at these specific positions, it can effectively prevent the lubricating oil from leaking from the bearings and at the same time prevent external contaminants from entering the inside of the bearings. This arrangement not only helps to maintain the lubrication state of the bearings, reduce wear and extend the service life, but also improves the reliability and operating efficiency of the entire gearbox.

[0141] The technical effect of this embodiment is that by setting the skeleton oil seals on the housing and the cover plate, an effective sealing system is formed, preventing the gear oil from leaking from the roller bearings and preventing external contaminants from entering the inside of the gearbox. This sealing design not only ensures the lubrication and clean environment inside the gearbox, reduces wear, but also improves the reliability and service life of the equipment, while reducing the maintenance cost and frequency.

[0142] In a possible design, a third needle roller bearing 209 is provided between the second roller bearing 206 and the second skeleton oil seal 208, and a fourth needle roller bearing 210 is provided between the fourth roller bearing 1005 and the fourth skeleton oil seal 1007. The third needle roller bearing 209 is connected to one end of the first output shaft 400 and the housing 200, and the fourth needle roller bearing 210 is connected to the other end of the first output shaft 400 and the cover plate 1000.

[0143] Specifically, by setting the third needle roller bearing 209 between the second roller bearing 206 and the second skeleton oil seal 208, and setting the fourth needle roller bearing 210 between the fourth roller bearing 1005 and the fourth skeleton oil seal 1007, further support and stability of the first output shaft 400 are achieved. This configuration can effectively disperse and bear the forces from different directions, reduce the friction and wear between the bearings, and improve the overall running smoothness and service life of the gearbox. At the same time, this design helps to maintain the sealing of the gear oil and prevent leakage, thereby ensuring the reliability and efficiency of the gearbox under various working conditions.

[0144] The technical effect of this embodiment is as follows: By arranging a third needle roller bearing between the second roller bearing and the second skeleton oil seal, and arranging a fourth needle roller bearing between the fourth roller bearing and the fourth skeleton oil seal, the support and stability of the first output shaft are enhanced. This design effectively disperses the axial and radial loads, reduces the friction and wear between the bearings, and thus improves the running smoothness and durability of the gearbox.

[0145] In a possible design, a first positioning and adjusting block 211 is provided between the first input gear 301 and the first roller bearing 205. The first positioning and adjusting block 211 is connected to one end of the first input shaft 300 and the housing 200. A second positioning and adjusting block 212 is provided between the second input gear 302 and the third roller bearing 1004. The second positioning and adjusting block 212 is connected to the other end of the first input shaft 300 and the cover plate 1000. Both the first positioning and adjusting block 211 and the second positioning and adjusting block 212 are used to prevent the first input shaft 300 from moving.

[0146] Specifically, by arranging a first positioning and adjusting block 211 between the first input gear 301 and the first roller bearing 205, and arranging a second positioning and adjusting block 212 between the second input gear 302 and the third roller bearing 1004, the axial positioning and fixation of the first input shaft 300 are realized. These positioning and adjusting blocks are respectively connected to both ends of the first input shaft 300, the housing, and the cover plate, ensuring that the first input shaft 300 remains stable during operation, preventing it from moving axially, and thus improving the running accuracy and reliability of the gearbox.

[0147] The technical effect of this embodiment is as follows: By arranging the first positioning and adjusting block and the second positioning and adjusting block, the precise positioning and fixation of the first input shaft are realized. This design effectively prevents the first input shaft from moving axially during operation, thus ensuring the stability of gear meshing and transmission efficiency, reducing the wear and noise caused by axial displacement, and improving the overall running reliability and service life of the gearbox.

[0148] Figure 5 is the structural schematic diagram of the hydraulic gear shifting device provided by the embodiment of the present application Figure 5 . As Figure 5 shown, based on the Figures 1 to 4 embodiment, the speed regulating gearbox is described in detail in this embodiment.

[0149] A second input shaft 2011 is provided on the gear pump 201. The second input shaft 2011 is connected to the cooling gear 1100, and the cooling gear 1100 meshes with the first input gear 301.

[0150] Specifically, the second input shaft 2011 of the gear pump 201 is meshed with the first input gear 301 through the cooling gear 1100, achieving power transmission. When the first input gear 301 rotates, it drives the cooling gear 1100 to rotate together, thereby driving the second input shaft 2011 of the gear pump 201. This design enables the gear pump 201 to work synchronously when the gearbox is running, ensuring the continuous circulation and distribution of the gear oil. This structure drives the gear pump 201 by utilizing the power of the gearbox itself, without the need for an additional power source, improving the overall efficiency of the system.

[0151] The first internal spline 501 is provided on the clutch 500, and the first external spline 303 is connected to the clutch 500 through the first internal spline 501.

[0152] Specifically, the first internal spline 501 provided on the clutch 500 meshes with the first external spline 303, achieving a mechanical connection between the two. When the clutch 500 moves axially, the meshing relationship between the internal spline and the external spline enables the clutch 500 to selectively connect or disconnect from different gear sets. This design can switch the power transmission path through a simple axial movement, thereby changing the output speed or torque, providing a flexible speed regulation function, and improving the adaptability and operating efficiency of the gearbox.

[0153] The technical effects of this embodiment are as follows: By connecting the second input shaft of the gear pump to the cooling gear and meshing the cooling gear with the first input gear, synchronous drive of the gear pump is achieved. This design directly drives the gear pump using the power output of the gearbox, without the need for an additional power source, ensuring the effective circulation and distribution of the gear oil. At the same time, through the meshing of the internal spline and the external spline on the clutch, flexible switching of the power transmission path is achieved. This structure not only improves the overall efficiency of the system but also effectively reduces the temperature of each shaft in the gearbox, extending the service life of the equipment.

[0154] 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 described 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 speed regulating gearbox, characterized in that: include: A hydraulic variable motor reducer (100), a housing (200), a first input shaft (300), a first output shaft (400), a clutch (500), a shift fork (600), a shift rod (700), a shift oil cylinder (800), a sector block (900) and a cover plate (1000); The hydraulic variable motor reducer (100) is arranged on the housing (200), the hydraulic variable motor reducer (100) is connected to one end of the first input shaft (300), and the other end of the first input shaft (300) is connected to the cover plate (1000) through the housing (200); A first input gear (301) and a second input gear (302) are provided on the first input shaft (300); a first external spline (303) is provided between the first input gear (301) and the second input gear (302); a second external spline (304) is provided between the first input gear (301) and the first external spline (303); and a third external spline (305) is provided between the second input gear (302) and the first external spline (303); One end of the first output shaft (400) is connected to the housing (200), and the other end of the first output shaft (400) is connected to the cover plate (1000) through the housing (200); a first output gear (401) and a second output gear (402) are provided on the first output shaft (400); the first output gear (401) is meshed with the second input gear (302), and the second output gear (402) is meshed with the first input gear (301); The first input shaft (300) is connected to the clutch (500), the clutch (500) is connected to the shift fork (600) via the sector block (900), the shift fork (600) is connected to the shift rod (700), and the shift rod (700) is connected to the shift oil cylinder (800) via the housing (200); The shift oil cylinder (800) is provided with an oil inlet (801) and an oil outlet (802); The cover plate (1000) is arranged on the shell (200), and the cover plate (1000) is used to close the shell (200); When the speed regulating gearbox is working, the hydraulic variable motor reducer (100) is used to generate a driving force and transmit the driving force to the first input shaft (300), the first input shaft (300) is used to transmit the driving force to the first output shaft (400), the first output shaft (400) is used to transmit the driving force to an external device, the oil inlet (801) and the oil outlet (802) are used to switch the flow direction of the hydraulic oil in the shift cylinder (800) to generate a pressure difference in the shift cylinder (800), and the shift rod (700) is used to perform axial movement according to the pressure difference to drive the shift fork (600) and the clutch (500) to move. Axial movement, the clutch (500) is used to connect with the second external spline (304) or the third external spline (305) according to the axial movement; when the clutch (500) is connected with the second external spline (304), the second external spline (304) is used to drive the first input gear (301) to rotate, so that the first input gear (301) drives the second output gear (402) to rotate; when the clutch (500) is connected with the third external spline (305), the third external spline (305) is used to drive the second input gear (302) to rotate, so that the second input gear (302) drives the first output gear (401) to rotate.

2. The speed regulating gear box according to claim 1, characterized in that: The cover plate (1000) is provided with an oil suction port (1001), a first oil guide hole (1002) and a second oil guide hole (1003); The housing (200) is provided with a gear pump (201), a gear oil distributor (202) and an oil return port (203); The oil suction port (1001) is connected to the gear pump (201), the gear pump (201) is connected to the gear oil distributor (202), the gear oil distributor (202) is respectively connected to the oil return port (203), the first oil guide hole (1002) and the second oil guide hole (1003), the first oil guide hole (1002) is connected to the first input shaft (300), and the second oil guide hole (1003) is connected to the first output shaft (400); wherein, The oil suction port (1001) is used to suck the gear oil, the gear pump (201) is used to convey the gear oil, the gear oil distributor (202) is used to distribute the gear oil, the first oil guide hole (1002) is used to transmit the gear oil to the first input shaft (300) to reduce the temperature of the first input shaft (300), and the second oil guide hole (1003) is used to transmit the gear oil to the first output shaft (400) to reduce the temperature of the first output shaft (400).

3. The speed regulating gear box according to claim 2, characterized in that: The gear pump (201) is provided with a second input shaft (2011), the second input shaft (2011) is connected to a cooling gear (1100), and the cooling gear (1100) is meshed with the first input gear (301); The clutch (500) is provided with a first internal spline (501), and the first external spline (303) is connected to the clutch (500) via the first internal spline (501).

4. The speed regulating gear box according to claim 1, characterized in that: The housing (200) is provided with an observation port (204), and the observation port (204) is used to display the internal conditions of the speed regulating gear box.

5. The speed regulating gear box according to claim 1, characterized in that: The first output shaft (400) is provided with a second internal spline (403) and a threaded hole (404), and the second internal spline (403) and the threaded hole (404) are both used for connecting to external equipment.

6. The speed regulating gear box according to claim 1, characterized in that: A first needle roller bearing (306) and a second needle roller bearing (307) are provided on the first input shaft (300); the first input shaft (300) is connected to the first input gear (301) via the first needle roller bearing (306); and the first input shaft (300) is connected to the second input gear (302) via the second needle roller bearing (307).

7. The speed regulating gear box according to claim 1, characterized in that: The housing (200) is provided with a first roller bearing (205) and a second roller bearing (206), and the cover plate (1000) is provided with a third roller bearing (1004) and a fourth roller bearing (1005); The first roller bearing (205) is connected to one end of the first input shaft (300), the second roller bearing (206) is connected to one end of the first output shaft (400), the third roller bearing (1004) is connected to the other end of the first input shaft (300), and the fourth roller bearing (1005) is connected to the other end of the first output shaft (400); the first roller bearing (205) and the third roller bearing (1004) are used to bear the radial force exerted on the first input shaft (300), and the second roller bearing (206) and the fourth roller bearing (1005) are used to bear the axial force exerted on the first output shaft (400).

8. The speed regulating gear box according to claim 7, characterized in that: The housing (200) is provided with a first skeleton oil seal (207) and a second skeleton oil seal (208), and the cover plate (1000) is provided with a third skeleton oil seal (1006) and a fourth skeleton oil seal (1007); The first skeleton oil seal (207) is arranged on a side of the first roller bearing (205) away from the housing (200), the second skeleton oil seal (208) is arranged on a side of the second roller bearing (206) away from the housing (200), the third skeleton oil seal (1006) is arranged on a side of the third roller bearing (1004) away from the housing (200), and the fourth skeleton oil seal (1007) is arranged on a side of the fourth roller bearing (1005) away from the housing (200). The first skeleton oil seal (207), the second skeleton oil seal (208), the third skeleton oil seal (1006) and the fourth skeleton oil seal (1007) are all used to seal the gear oil in the housing (200).

9. The speed regulating gear box according to claim 8, characterized in that: A third needle roller bearing (209) is provided between the second roller bearing (206) and the second skeleton oil seal (208), and a fourth needle roller bearing (210) is provided between the fourth roller bearing (1005) and the fourth skeleton oil seal (1007). The third needle roller bearing (209) is connected to one end of the first output shaft (400) and the housing (200), and the fourth needle roller bearing (210) is connected to the other end of the first output shaft (400) and the cover plate (1000).

10. The speed regulating gear box according to claim 7, characterized in that: A first positioning adjustment block (211) is provided between the first input gear (301) and the first roller bearing (205), the first positioning adjustment block (211) being connected to one end of the first input shaft (300) and the housing (200); a second positioning adjustment block (212) is provided between the second input gear (302) and the third roller bearing (1004), the second positioning adjustment block (212) being connected to the other end of the first input shaft (300) and the cover plate (1000); the first positioning adjustment block (211) and the second positioning adjustment block (212) are both used to prevent the first input shaft (300) from moving.

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