Coaxial double-motor electric drive structure and tractor

Abstract

The application provides a coaxial double-motor electric drive structure and a tractor. The coaxial double-motor electric drive structure comprises a walking drive component and a power drive component; the walking drive component has a walking part, and the walking part has a first output part capable of transmitting power to a rear central assembly; the power drive component is connected with the walking drive component, and the power drive component has a power part, the power part has a second output part and a third output part extending in directions away from each other, and the second output part passes through the first output part. The rear power output shaft of the application passes through the walking motor output shaft, so that the output motor and the walking motor form a coaxial double-motor structure, which has three output ends of the first output part, the second output part and the third output part, and can drive a rear axle, a front power output assembly and a rear power output assembly respectively; in this way, the space occupancy is greatly reduced, and a larger operation space is provided for the overall machine arrangement.

Description

Technical Field

[0001] This application relates to the field of tractor technology, and in particular to a coaxial dual-motor electric drive structure and a tractor. Background Technology

[0002] A tractor is a self-propelled power unit used to tow and drive construction machinery to complete various mobile tasks, and can also be used as a power source for stationary operations; it consists of systems or devices such as engine, transmission, travel, steering, hydraulic suspension, power output, electrical instruments, driving control and traction.

[0003] However, currently, when a tractor needs to output to multiple points, an additional motor must be added, which results in high costs and difficulty in deployment due to the large number of motors.

[0004] Therefore, there is an urgent need for a coaxial dual-motor electric drive structure and tractors to solve the technical problems existing in the current technology to a certain extent. Utility Model Content

[0005] The purpose of this application is to provide a coaxial dual-motor electric drive structure and a tractor, which to some extent solves the technical problem in the prior art that when multiple outputs are required, additional motors must be added, resulting in high costs and difficult layout.

[0006] This application provides a coaxial dual-motor electric drive structure; comprising: A walking drive component having a walking section having a first output section capable of transmitting power to a rear central assembly; A power drive component is connected to the walking drive component. The power drive component has a power section, which has a second output section and a third output section extending in mutually opposite directions, and the third output section passes through the first output section.

[0007] In the above technical solution, the walking part is a walking motor, and the first output part is the output shaft of the walking motor; The output shaft of the travel motor is connected to the rear central assembly to drive the rear axle to rotate.

[0008] In the above technical solution, the power unit is a power output motor, the second output unit is a front power output shaft, and the third output unit is a rear power output shaft; The front power output shaft is connected to the front power output assembly and is used to output power to the front power output assembly. The rear power output shaft passes through the output shaft of the walking motor and is connected to the rear power output assembly for outputting power to the rear power output assembly.

[0009] In the above technical solution, the front power output shaft and the rear power output shaft are further connected by an internal spline structure; The output shaft of the walking motor is connected to the rear central assembly using an external spline structure.

[0010] In the above technical solution, the walking motor and the power output motor are further connected by a connector.

[0011] In the above technical solution, the coaxial dual-motor electric drive structure further includes a housing; The housing encloses an installation space having a first mounting position and a second mounting position arranged along a first direction; The power drive component is disposed at the first mounting position, and the walking drive component is disposed at the second mounting position.

[0012] This application also provides a tractor, including the above-described coaxial dual-motor electric drive structure and rear central assembly; The rear central assembly includes a gear shaft, an input gear, a first bevel gear, and a second bevel gear; The output shaft of the walking motor is connected to the gear shaft and can drive the gear shaft to rotate in the second direction; The gear shaft meshes with the input gear, and the input gear is coaxial with the first bevel gear, so that when the gear shaft rotates in the second direction, both the input gear and the first bevel gear can rotate in the second direction. The second bevel gear is sleeved on the axle extending in the third direction and meshes with the first bevel gear. When the first bevel gear rotates in the second direction, the second bevel gear can rotate in the fourth direction to drive the axle to rotate in the fourth direction and realize the rear-drive mode.

[0013] In the above technical solution, the rear central assembly further includes a transfer case; The transfer case includes a drive gear, a transfer case idler gear, a transfer case driven gear, and a front axle input shaft; The drive gear is coaxial with the input gear, the transfer case driven gear is sleeved on the front axle input shaft, and the transfer case driven gear meshes with the transfer case idler gear; When switched to four-wheel drive mode, the drive gear meshes with the transfer case idler gear.

[0014] In the above technical solution, the rear central assembly further includes a rear power output module and a centrally located power output module; The rear power output shaft is connected to the rear power output module and the mid-mounted power output module respectively, and transmits power to the rear power output module and the mid-mounted power output module respectively through the rear power output shaft.

[0015] In the above technical solution, the tractor further includes a front power output assembly, which includes a power take-off box, a transfer case, and a hydraulic pump. The front power output shaft is connected to the power take-off box, the output of the power take-off box is connected to the transfer case, and the output of the transfer case is connected to the hydraulic pump.

[0016] Compared with the prior art, this application has the following beneficial effects: This application provides a coaxial dual-motor electric drive structure; comprising: A walking drive component having a walking section having a first output section capable of transmitting power to a rear central assembly; A power drive component is connected to the walking drive component. The power drive component has a power section, which has a second output section and a third output section extending in mutually opposite directions, and the third output section passes through the first output section.

[0017] In summary, the third output section of this application passes through the first output section, so that the output motor (power section) and the travel motor (travel section) form a coaxial dual-motor structure. It has three output ends: the first output section, the second output section and the third output section, which can drive the rear axle, the front power output assembly and the rear power output assembly respectively. This arrangement greatly reduces the space occupancy rate and provides more operating space for the overall machine layout.

[0018] This application also provides a tractor, including the above-described coaxial dual-motor electric drive structure and rear central assembly; The rear central assembly includes a gear shaft, an input gear, a first bevel gear, and a second bevel gear; The output shaft of the walking motor is connected to the gear shaft and can drive the gear shaft to rotate in the second direction; The gear shaft meshes with the input gear, and the input gear is coaxial with the first bevel gear, so that when the gear shaft rotates in the second direction, both the input gear and the first bevel gear can rotate in the second direction. The second bevel gear is sleeved on the axle extending in the third direction and meshes with the first bevel gear. When the first bevel gear rotates in the second direction, the second bevel gear can rotate in the fourth direction to drive the axle to rotate in the fourth direction and realize the rear-drive mode.

[0019] This solution incorporates a coaxial dual-motor electric drive structure, thus possessing all the beneficial effects of a coaxial dual-motor electric drive structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the coaxial dual-motor electric drive structure provided in this application; Figure 2 A structural schematic diagram of the tractor provided in this application from a first-view perspective; Figure 3 A structural schematic diagram of the tractor provided in this application from a second-view perspective; Figure 4 A structural schematic diagram of the tractor provided in this application from a third-person perspective; Figure 5 A partial structural schematic diagram of the tractor provided in this application from a fourth-person perspective; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 A partial structural schematic diagram of the tractor provided in this application from a fifth-person perspective; Figure 8 for Figure 7 Enlarged view of section B in the middle.

[0022] Reference numerals: 1-Walking drive component; 101-Walking part; 102-First output part; 103-Walking motor; 104-Walking motor output shaft; 2-Power drive component; 201-Power unit; 202-Second output unit; 203-Third output unit; 204-Power output motor; 205-Front power output shaft; 206-Rear power output shaft; 207-Internal spline structure; 208-Internal gear; 209-Connector; 210-External gear; 211-External spline structure; 3-Rear central assembly; 301-Rear axle; 302-Gear shaft; 303-Input gear; 304-First bevel gear; 305-Second bevel gear; 306-Second direction; 307-Third direction; 309-Fourth direction; 310-Transfer case; 311-Drive gear; 312-Transfer case idler gear; 313-Transfer case driven gear; 314-Front axle input shaft; 315-Front axle; 316-Rear power take-off module; 317-Mid-mounted power take-off module; 318-Power take-off box; 319-Transfer case; 4-Housing; 401-First direction; 402-Mounting space. Detailed Implementation

[0023] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order presented herein; rather, changes that will be apparent upon understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity. The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application. Throughout this specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between. As used herein, the term "and / or" includes any one of the relevant items listed and any combination of any two or more of them. Although terms such as "first," "second," and "third" may be used herein to describe individual components, assemblies, regions, layers, or portions, these components, assemblies, regions, layers, or portions are not limited by these terms. More precisely, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as such in the examples may also be referred to as the second component, assembly, region, layer, or part. For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element.Therefore, the term "above" includes both "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., oscillating 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly. The terminology used herein is for describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising," "including," and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. Variations in the shapes shown in the figures may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing. The features of the examples described herein may be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible as will be apparent upon understanding the disclosure of this application.

[0024] Example 1 To address the current technical problem that when a tractor requires multiple outputs, additional motors must be added, leading to high costs and complex deployment due to the large number of motors, this application provides a solution. The coaxial dual-motor electric drive structure is described below in conjunction with... Figures 1-8 This paper elaborates on the coaxial dual-motor electric drive structure.

[0025] Combination Figure 1 As shown, the coaxial dual-motor electric drive structure includes a walking drive component 1. Specifically, the walking drive component 1 has a walking section 101, which has a first output section 102 capable of transmitting power to the rear central assembly 3.

[0026] Furthermore, the walking part 101 is a walking motor 103, and the first output part 102 is a walking motor output shaft 104; The output shaft 104 of the travel motor 103 is connected to the rear central assembly 3 to drive the rear axle 301 to rotate.

[0027] Continue to combine Figure 1 As shown, the coaxial dual-motor electric drive structure also includes a power drive component 2, which is connected to the walking drive component 1. Specifically, the power drive component 2 has a power unit 201, which has a second output unit 202 and a third output unit 203. Figure 1Taking the direction shown in the figure as an example, the second output section 202 extends to the left and the third output section 203 extends to the right, that is, the second output section 202 and the third output section 203 extend in opposite directions.

[0028] In addition, the third output section 203 passes through the output shaft 104 of the walking motor.

[0029] Furthermore, the power unit 201 is a power output motor 204, the second output unit 202 is a front power output shaft 205, and the third output unit 203 is a rear power output shaft 206; wherein, the front power output shaft 205 is connected to the front power output assembly and is used to output power to the front power output assembly; wherein, the rear power output shaft 206 passes through the travel motor output shaft 104 and is connected to the rear power output assembly and is used to output power to the rear power output assembly.

[0030] In summary, the rear power output shaft 206 of this application passes through the walking motor output shaft 104, so that the output motor and the walking motor 103 form a coaxial dual-motor structure. It has three output ends: a first output part 102, a second output part 202, and a third output part 203, which can drive the rear axle 301, the front power output assembly, and the rear power output assembly, respectively. This arrangement greatly reduces the space occupancy rate and provides more operating space for the overall machine layout.

[0031] In this embodiment, further combined Figure 1 As shown, the front power output shaft 205 and the rear power output shaft 206 are connected by an internal spline structure 207; the travel motor output shaft 104 and the rear central assembly 3 are connected by an external spline structure 211.

[0032] Specifically, the internal spline structure 207 includes internal teeth 208, that is, a groove is provided at one end of the front power output shaft 205 near the rear power output shaft 206, the groove has internal teeth 208, one end of the rear power output shaft 206 near the front power output shaft 205 is inserted into the groove, and one end of the rear power output shaft 206 near the front power output shaft 205 is provided with external teeth 210, the external teeth 210 mesh with the internal teeth 208 to realize torque transmission.

[0033] Specifically, the external spline structure 211 includes external teeth 210. The outer side wall of the end of the walking motor output shaft 104 opposite to the front power output shaft 205 is provided with external teeth 210, and the rear central assembly 3 has internal teeth 208. The external teeth 210 and the internal teeth 208 mesh and connect to realize torque transmission.

[0034] In this embodiment, further combined Figure 1 As shown, the walking motor 103 and the power output motor 204 are connected by a connector 209.

[0035] Optionally, the housing of the travel motor 103 and the housing of the power output motor 204 are connected by a connector 209. Preferably, the connector 209 is a connecting bolt, that is, the housing of the travel motor 103 and the housing of the power output motor 204 are connected by connecting bolts.

[0036] In this embodiment, further combined Figure 1 As shown, the coaxial dual-motor electric drive structure also includes a housing 4; the housing 4 surrounds a mounting space 402 having a first mounting position and a second mounting position arranged along a first direction 401; here, the first direction 401 refers to... Figure 1 The left and right directions within this area. The first and second mounting positions here are used to divide the mounting space 402 area, but they do not have a physical structure.

[0037] Alternatively, the power drive component 2 is disposed in the first mounting position, and the walking drive component 1 is disposed in the second mounting position.

[0038] Preferably, the housing of the walking motor 103 is bolted to the housing 4, and the housing of the power output motor 204 is bolted to the housing 4.

[0039] Example 2 In this embodiment, combined with Figures 2-8 As shown, the structure of a tractor is described in detail. The tractor includes a coaxial dual-motor electric drive structure and a rear central assembly 3.

[0040] Specifically, combined Figures 5-8 As shown, the rear central assembly 3 includes a gear shaft 302, an input gear 303, a first bevel gear 304, and a second bevel gear 305; wherein, the output shaft 104 of the travel motor is connected to the gear shaft 302 and can drive the gear shaft 302 to rotate along a second direction 306; the second direction 306 is in Figure 6 As shown in the diagram, the gear shaft 302 is meshed with the input gear 303, meaning that when the gear shaft 302 rotates in the second direction 306, the input gear 303 will also rotate in the second direction 306.

[0041] The input gear 303 is coaxial with the first bevel gear 304, meaning that when the input gear 303 rotates along the second direction 306, the first bevel gear 304 can rotate along the second direction 306.

[0042] The second bevel gear 305 is fitted onto the axle extending along a third direction 307 and meshes with the first bevel gear 304. Here, the third direction 307 refers to the width direction of the tractor. Figure 4 It is shown in the figure.

[0043] Furthermore, since both the first bevel gear 304 and the second bevel gear 305 are conical gears, the meshing action of the first bevel gear 304 and the second bevel gear 305 can change the direction of power transmission and increase torque. That is, when the first bevel gear 304 rotates along the second direction 306, the second bevel gear 305 can rotate along the fourth direction 309. Here, the fourth direction 309 refers to... Figure 6 It is shown in the figure.

[0044] In actual driving process, the second bevel gear 305 drives the differential housing to rotate, distributing power to the left and right half shafts, which in turn drive the two rear wheels (rear axle 301) to rotate, thus achieving rear-drive mode.

[0045] Further integration Figures 5-8 As shown, the rear central assembly 3 also includes a transfer case 310; the transfer case 310 includes a drive gear 311, a transfer case idler gear 312, a transfer case driven gear 313, and a front axle input shaft 314.

[0046] In this configuration, the drive gear 311 is coaxial with the input gear 303, and the transfer case driven gear 313 is sleeved on the front axle input shaft 314 (which extends along the length of the tractor). The transfer case driven gear 313 meshes with the transfer case idler gear 312. In actual driving, when switching to four-wheel drive mode, the gear shifting causes the drive gear 311 to mesh with the transfer case idler gear 312, which allows some power to be drawn from the gearbox output shaft and transmitted to the front axle input shaft 314. The power is then distributed to the two front wheels (front axle 315) through the front half-shaft, thus achieving four-wheel drive mode. When switching back to two-wheel drive, the power transmission to the front axle 315 is cut off, leaving only the rear axle 301 to drive.

[0047] In this embodiment, combined with Figure 3 and Figure 4 As shown, the rear central assembly 3 also includes a rear power output module 316 and a central power output module 317. The rear power output shaft 206 is connected to both the rear power output module 316 and the central power output module 317, and transmits power to both modules respectively.

[0048] The aforementioned rear power output module 316 and the aforementioned mid-mounted power output module 317 both refer to some external equipment, such as mixing equipment and crushing equipment.

[0049] In this embodiment, combined with Figure 3 and Figure 4 As shown, the tractor also includes a front power take-off assembly, which includes a power take-off box 318, a transfer case 319, and a hydraulic pump.

[0050] The front power output shaft 205 is connected to the power take-off box 318, the output of the power take-off box 318 is connected to the transfer case 319, and the output of the transfer case 319 is connected to the hydraulic pump.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A coaxial dual-motor electric drive structure; characterized in that, include: A walking drive component having a walking section having a first output section capable of transmitting power to a rear central assembly; A power drive component is connected to the walking drive component. The power drive component has a power section, which has a second output section and a third output section extending in mutually opposite directions, and the third output section passes through the first output section.

2. The coaxial dual-motor electric drive structure according to claim 1, characterized in that, The walking part is a walking motor, and the first output part is the output shaft of the walking motor; The output shaft of the travel motor is connected to the rear central assembly to drive the rear axle to rotate.

3. The coaxial dual-motor electric drive structure according to claim 2, characterized in that, The power unit is a power output motor, the second output unit is a front power output shaft, and the third output unit is a rear power output shaft; The front power output shaft is connected to the front power output assembly and is used to output power to the front power output assembly. The rear power output shaft passes through the output shaft of the walking motor and is connected to the rear power output assembly for outputting power to the rear power output assembly.

4. The coaxial dual-motor electric drive structure according to claim 3, characterized in that, The front power output shaft and the rear power output shaft are connected by an internal spline structure; The output shaft of the walking motor is connected to the rear central assembly using an external spline structure.

5. The coaxial dual-motor electric drive structure according to claim 3, characterized in that, The walking motor and the power output motor are connected by a connector.

6. The coaxial dual-motor electric drive structure according to claim 5, characterized in that, The coaxial dual-motor electric drive structure also includes a housing; The housing encloses an installation space having a first mounting position and a second mounting position arranged along a first direction; The power drive component is disposed at the first mounting position, and the walking drive component is disposed at the second mounting position.

7. A tractor, characterized in that, Includes the coaxial dual-motor electric drive structure and the rear central assembly as described in claim 6; The rear central assembly includes a gear shaft, an input gear, a first bevel gear, and a second bevel gear; The output shaft of the walking motor is connected to the gear shaft and can drive the gear shaft to rotate in the second direction; The gear shaft meshes with the input gear, and the input gear is coaxial with the first bevel gear, so that when the gear shaft rotates in the second direction, both the input gear and the first bevel gear can rotate in the second direction. The second bevel gear is sleeved on the axle extending in the third direction and meshes with the first bevel gear. When the first bevel gear rotates in the second direction, the second bevel gear can rotate in the fourth direction to drive the axle to rotate in the fourth direction and realize the rear-drive mode.

8. The tractor according to claim 7, characterized in that, The rear central assembly also includes a transfer case; The transfer case includes a drive gear, a transfer case idler gear, a transfer case driven gear, and a front axle input shaft; The drive gear is coaxial with the input gear, the transfer case driven gear is sleeved on the front axle input shaft, and the transfer case driven gear meshes with the transfer case idler gear; When switched to four-wheel drive mode, the drive gear meshes with the transfer case idler gear.

9. The tractor according to claim 7, characterized in that, The rear central assembly also includes a rear power output module and a centrally mounted power output module; The rear power output shaft is connected to the rear power output module and the mid-mounted power output module respectively, and transmits power to the rear power output module and the mid-mounted power output module respectively through the rear power output shaft.

10. The tractor according to claim 7, characterized in that, The tractor also includes a front power take-off assembly, which includes a power take-off box, a transfer case, and a hydraulic pump. The front power output shaft is connected to the power take-off box, the output of the power take-off box is connected to the transfer case, and the output of the transfer case is connected to the hydraulic pump.

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