Dual-power coaxial decoupling transmission device

Abstract

A dual-power coaxial decoupling transmission device, comprising an outer transmission shaft (110) and an inner transmission shaft (134) which are coaxially arranged. The outer transmission shaft (110) is a hollow shaft, the diameter of the outer transmission shaft (110) is larger than that of the inner transmission shaft (134), and the inner transmission shaft (134) is arranged in the outer transmission shaft (110); an outer transmission input gear (137) for driving a wheel assembly is provided on the outer transmission shaft (110), and the outer transmission input gear (137) is driven by traveling power (131) by means of a transmission unit; the inner transmission shaft (134) connected to an external working component is driven by an inner shaft driving gear (133), and the inner shaft driving gear (133) is driven by external power (101) by means of a transmission structure; and the outer transmission input gear (137) and the inner shaft driving gear (133) are concentrically and coaxially arranged.

Description

Dual-power concentric decoupling transmission device TECHNICAL FIELD

[0001] The present application relates to the field of mechanical transmission, in particular to a dual-power concentric decoupling transmission device. BACKGROUND

[0002] The conventional vehicle gearbox is adapted to the characteristics of the fuel engine to meet the working condition requirements, and all driving sources are derived from the same power source, for example, the walking traction power and PTO working power of the conventional fuel tractor are derived from the same diesel engine, which cannot achieve completely independent driving and interfere with each other.

[0003] At present, the gearboxes designed for new energy motor drive generally adopt a one-to-one power mode according to power requirements, and multiple power sources are installed in a split manner, which occupies a large space and has low system integration. In the field of new energy tractor driving, a research institution proposes a coupled gearbox integrated in one body, which uses two small power motors for coupled transmission. Although it achieves integration, the coupled mechanism control is complex, and it can meet the power confluence requirement in single working condition, but when facing the complex working condition of walking traction power and PTO power, the real-time power distribution is limited by the maximum power of a single motor, and the working condition adaptability is limited.

[0004] A research institution proposes a way to realize dual-power coupled driving in the same gearbox in the electric drive tractor coupling control, and the walking drive and PTO working system power are supplemented by the coupling mechanism. However, the subsequent power distribution is limited, and additional controllable hydraulic valves, or controllable hydraulic pumps, or controllable torque converters, etc. must be matched to meet the actual application.

[0005] Therefore, the current split gearbox decoupling, co-gearbox decoupling, non-coaxial, co-gearbox coupling cannot meet the application scenarios with high space requirements, and it is necessary to improve. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a dual-power concentric decoupling transmission device, which adopts concentric coaxial, independent transmission mode of inner and outer separate driving, has compact structure, high space utilization rate, energy saving integration, and facilitates precise control of the system.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is:

[0008] The application comprises concentrically arranged outer transmission shaft and inner transmission shaft, the outer transmission shaft is a hollow shaft and the diameter of the outer transmission shaft is larger than that of the inner transmission shaft, the inner transmission shaft is arranged in the outer transmission shaft; the outer transmission shaft is provided with an outer transmission input gear for driving a wheel assembly, the outer transmission input gear is driven by a walking power through a transmission unit; the inner transmission shaft connected with an external working component is driven by an inner shaft driving gear, the inner shaft driving gear is driven by an external power through a transmission structure; the outer transmission input gear and the inner shaft driving gear are arranged concentrically and coaxially.

[0009] The further improvement of the application is that the transmission unit comprises a power input transmission shaft connected with the walking power, a power input driving gear arranged on the power input transmission shaft and a power input intermediate gear meshed with the power input driving gear on one side, the other side of the power input intermediate gear is meshed with the outer transmission input gear.

[0010] The further improvement of the application is that the outer transmission input gear is connected with a first driving gear, a third driving gear and a fourth driving gear respectively, the first driving gear drives a first driven gear or a second driven gear; the third driving gear drives a third driven gear, the fourth driving gear drives a fourth driven gear; a first gear shifting mechanism is arranged between the first driven gear and the second driven gear, a second gear shifting mechanism is arranged between the third driving gear and the fourth driving gear.

[0011] The further improvement of the application is that the transmission structure comprises an external input transmission shaft connected with the external power, an external transmission gear arranged on the external input transmission shaft and an external transmission intermediate gear meshed with the external transmission gear, the external transmission intermediate gear is meshed with the inner shaft driving gear.

[0012] The further improvement of the application is that the external transmission intermediate gear is arranged on an intermediate gear shaft.

[0013] The further improvement of the application is that both ends of the inner transmission shaft are supported by inner shaft support bearings on the box, the inner shaft support bearings comprise a first inner shaft support bearing and a second inner shaft support bearing.

[0014] The further improvement of the application is that the inner transmission shaft is provided with an inner shaft output gear for transmitting torque and rotating speed to the external working component.

[0015] The further improvement of the application is that the external input transmission shaft is connected with a power output additional pump.

[0016] The further improvement of the application is that the external power and the walking power are both arranged on the box.

[0017] Further improvement of the present application is that the box is provided with an outer shaft support bearing supporting the outer transmission shaft, and the outer shaft support bearing comprises a first outer shaft support bearing, a third outer shaft support bearing arranged at both ends of the outer transmission shaft and a second outer shaft support bearing arranged at the middle part.

[0018] Due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0019] The walking power and external power of the present application adopt the concentric coaxial, inner and outer split driving mode, and the structure is compact and the space utilization rate is high. The double power transmission is independent and does not occur coupling. In the working condition that the walking traction load and the external load change in real time, each power transmission route can provide the highest power, and the adaptability is strong.

[0020] The present application is a double power concentric decoupling transmission, which realizes zero emission and zero pollution by adopting electric drive; has smaller noise and vibration than traditional fuel-driven; saves energy and money; is easy to maintain; and has fast starting and accelerating response. The simple operation, good energy saving, integrated control and simplified speed change mechanism not only meet the demand of installation space, but also easily realize precise control of the system. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a schematic diagram of the three-dimensional structure of the present application;

[0022] Fig. 2 is a schematic diagram of the cross-sectional structure of the concentric decoupling transmission of the present application;

[0023] Fig. 3 is a schematic diagram of the three-dimensional structure of the transmission box of the present application;

[0024] Fig. 4 is a schematic diagram of the transmission principle structure of the present application.

[0025] Among them, 101 is external power; 103 is external transmission gear; 104 is external transmission intermediate gear; 105 is external input transmission shaft; 106 is intermediate gear shaft; 107 is power output additional pump; 108 is first level driving gear; 110 is outer transmission shaft; 111 is third level driven gear; 112 is box; 113 is fourth level driving gear; 114 is inner shaft output gear; 115 is first inner shaft support bearing; 116 is first outer shaft support bearing; 117 is second outer shaft support bearing; 119 is fourth level driven gear; 120 is second gear shifting mechanism; 121 is third level driving gear; 122 is outer shaft driven shaft; 123 is second level driven gear; 124 is first gear shifting mechanism; 125 is first level driven gear; 127 is power input driving gear; 128 is power input intermediate gear; 129 is power input transmission shaft; 131 is walking power; 133 is inner shaft driving gear; 134 is inner transmission shaft; 135 is second inner shaft support bearing; 136 is third outer shaft support bearing; 137 is outer transmission input gear. DETAILED DESCRIPTION

[0026] The application will be further described in detail in connection with the following examples:

[0027] A dual-power concentric decoupling transmission device, as shown in Figures 1-4, comprises a concentrically arranged outer transmission shaft 110 and an inner transmission shaft 134, the outer transmission shaft 110 is a hollow shaft and the diameter of the outer transmission shaft 110 is larger than the diameter of the inner transmission shaft 134, the inner transmission shaft 134 is arranged inside the outer transmission shaft 110, the inner transmission shaft 134 is arranged concentrically with the outer transmission shaft 110, the outer transmission shaft 110 is a hollow shaft, the inner transmission shaft 134 can be a solid shaft or a hollow shaft, and the inner transmission shaft 134 is installed at the shaft center of the outer transmission shaft 110.

[0028] The outer transmission shaft 110 is driven by a walking power 131 to provide power for the vehicle walking mechanism, and the inner transmission shaft 134 is driven by an external power 101 to provide power for the driving output of the vehicle external implement. The external power 101 and the walking power 131 are arranged on the box body 112, and the external power 101 and the walking power 131 are installed in parallel, concentrically coaxial, and independently driven, which has a compact structure and high space utilization rate. It meets the installation space requirements of the tractor transmission, realizes system integration and precise control. The external power 101 and the walking power 131 are independently driven and do not interfere with each other, do not couple, simplify the gear arrangement of the box body 112, and have high transmission efficiency. Under the working condition of real-time change of walking traction load and external load, each power transmission route can provide the highest power, and the adaptability is strong.

[0029] As shown in Figures 3 and 4, the outer transmission shaft 110 is provided with an outer transmission input gear 137 for driving a wheel assembly, the outer transmission input gear 137 is driven by the walking power 131 through a transmission unit, the inner transmission shaft 134 of the external working part is driven by an inner shaft driving gear 133, and the inner shaft driving gear 133 is driven by the external power 101 through a transmission structure; the outer transmission input gear 137 and the inner shaft driving gear 133 are concentrically coaxial and independently driven in an inner-outer structure, the walking power 131 drives the outer transmission shaft 110 to transmit torque and speed through the outer transmission input gear 137, and the external power 101 drives the inner transmission shaft 134 arranged in the center of the outer transmission shaft 110 to transmit torque and speed through the inner shaft driving gear 133. The external power 101 and the walking power 131 are both electrically driven, realizing zero emission, zero pollution, smaller noise and vibration, energy saving and money saving, easy maintenance, and fast response to starting and acceleration. It realizes simple operation, good energy saving, integrated control, and simplified transmission mechanism, which not only meets the installation space requirements, but also easily realizes precise control of the system.

[0030] The transmission unit comprises a power input transmission shaft 129 connected with the walking power 131, a power input driving gear 127 arranged on the power input transmission shaft 129, and a power input intermediate gear 128 engaged with the power input driving gear 127, and the other side of the power input intermediate gear 128 is engaged with an external transmission input gear 137. Start the walking power 131, and the power input transmission shaft 129 connected with the output shaft of the walking power 131 rotates, and then the power input driving gear 127 on the power input transmission shaft 129 rotates, and the power input intermediate gear 128 engaged with the power input driving gear 127 rotates, and the other side of the power input intermediate gear 128 is engaged with the external transmission input gear 137 rotates.

[0031] The external transmission input gear 137 is connected with the first driving gear 108, the third driving gear 121 and the fourth driving gear 113 respectively, and the external transmission input gear 137 rotates to drive the first driving gear 108 to rotate, and the first driving gear 108 drives the first driven gear 125 or the second driven gear 123, and the first gear shifting mechanism 124 is arranged between the first driven gear 125 and the second driven gear 123, and the first gear shifting mechanism 124 is operated to select whether to drive the first driven gear 125 or the second driven gear 123.

[0032] The third driving gear 121 drives the third driven gear 111, and the fourth driving gear 113 drives the fourth driven gear 119, and the second gear shifting mechanism 120 is arranged between the third driving gear 121 and the fourth driving gear 113, and the second gear shifting mechanism 120 is operated to select whether to drive the third driving gear 121 to drive the third driven gear 111 or to drive the fourth driving gear 113 to drive the fourth driven gear 119. Further drive the wheel assembly to complete the walking of the tractor.

[0033] The transmission structure comprises an external input transmission shaft 105 connected with the external power 101, an external transmission gear 103 arranged on the external input transmission shaft 105, and an external transmission intermediate gear 104 engaged with the external transmission gear 103, and the external transmission intermediate gear 104 is engaged with the inner shaft driving gear 133. Start the external power 101, and the output shaft of the external power 101 rotates to drive the external input transmission shaft 105 connected therewith to rotate, and the external transmission gear 103 arranged on the external input transmission shaft 105 rotates, and the external transmission gear 103 rotates to drive the external transmission intermediate gear 104 engaged therewith to rotate, and then the inner shaft driving gear 133 engaged with the external transmission intermediate gear 104 rotates, and the inner shaft driving gear 133 rotates to drive the inner transmission shaft 134, and the inner shaft output gear 114 for transmitting torque and rotating speed to other external working components is arranged on the inner transmission shaft 134, and the power is provided for the external implement driving output of the tractor.

[0034] As shown in Fig. 3, the outer transmission intermediate gear 104 is arranged on the intermediate gear shaft 106. Both ends of the inner transmission shaft 134 are supported by the inner shaft support bearings arranged on the box 112, which include the first inner shaft support bearing 115 and the second inner shaft support bearing 135. The box 112 is provided with the outer shaft support bearings supporting the outer transmission shaft 110, which include the first outer shaft support bearing 116, the third outer shaft support bearing 136 arranged at both ends of the outer transmission shaft 110, and the second outer shaft support bearing 117 arranged at the middle part.

[0035] As shown in Figs. 3 and 4, the outer input transmission shaft 105 is connected with the power output additional pump 107 to provide the required power for other executing elements.

[0036] Finally, it should be noted that the above examples are only for the purpose of illustrating the present application, and are not intended to limit the embodiments. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can be made, and all the embodiments cannot be exhausted, and the obvious changes or variations still belong to the protection scope of the present application.

Claims

1. A dual-power concentric decoupling transmission device, characterized in that: It includes an outer drive shaft (110) and an inner drive shaft (134) arranged concentrically. The outer drive shaft (110) is a hollow shaft and its diameter is larger than that of the inner drive shaft (134). The inner drive shaft (134) is disposed inside the outer drive shaft (110). The outer drive shaft (110) is provided with an outer drive input gear (137) for driving the wheel assembly. The outer drive input gear (137) is driven by the walking power (131) through the transmission unit. The inner drive shaft (134) of the external working component is driven by the inner shaft drive gear (133), which is driven by the external power (101) through the transmission structure; The external transmission input gear (137) and the internal shaft drive gear (133) are arranged concentrically and coaxially.

2. The dual-power concentric decoupling transmission device according to claim 1, characterized in that: The transmission unit includes a power input drive shaft (129) connected to the walking power (131), a power input drive gear (127) disposed on the power input drive shaft (129), and a power input intermediate gear (128) meshing with the power input drive gear (127) on one side, and the other side of the power input intermediate gear (128) meshing with the external transmission input gear (137).

3. The dual-power concentric decoupling transmission device according to claim 2, characterized in that: The external transmission input gear (137) is connected to the first-stage driving gear (108), the third-stage driving gear (121), and the fourth-stage driving gear (113) respectively. The first-stage driving gear (108) drives the first-stage driven gear (125) or the second-stage driven gear (123); the third-stage driving gear (121) drives the third-stage driven gear (111), and the fourth-stage driving gear (113) drives the fourth-stage driven gear (119). A first shifting mechanism (124) is provided between the first-stage driven gear (125) and the second-stage driven gear (123), and a second shifting mechanism (120) is provided between the third-stage driving gear (121) and the fourth-stage driving gear (113).

4. The dual-power concentric decoupling transmission device according to claim 1, characterized in that: The transmission structure includes an external input transmission shaft (105) connected to an external power source (101), an external transmission gear (103) mounted on the external input transmission shaft (105), and an external transmission intermediate gear (104) meshing with the external transmission gear (103). The external transmission intermediate gear (104) meshes with the inner shaft drive gear (133).

5. The dual-power concentric decoupling transmission device according to claim 4, characterized in that: The external transmission intermediate gear (104) is mounted on the intermediate gear shaft (106).

6. The dual-power concentric decoupling transmission device according to claim 4, characterized in that: Both ends of the inner drive shaft (134) are supported by inner shaft support bearings on the housing (112), and the inner shaft support bearings include a first inner shaft support bearing (115) and a second inner shaft support bearing (135).

7. The dual-power concentric decoupling transmission device according to claim 6, characterized in that: The inner drive shaft (134) is provided with an inner shaft output gear (114) for transmitting torque and speed to external working parts.

8. The dual-power concentric decoupling transmission device according to claim 7, characterized in that: The external input drive shaft (105) is connected to the power output auxiliary pump (107).

9. The dual-power concentric decoupling transmission device according to any one of claims 1-8, characterized in that: The external power (101) and the walking power (131) are both located on the housing (112).

10. A dual-power concentric decoupling transmission device according to claim 9, characterized in that: The housing (112) is provided with an outer shaft support bearing for supporting the outer drive shaft (110). The outer shaft support bearing includes a first outer shaft support bearing (116) and a third outer shaft support bearing (136) located at both ends of the outer drive shaft (110) and a second outer shaft support bearing (117) located in the middle.

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