Dual-power concentric decoupling transmission device

Abstract

The utility model discloses a dual-power concentric decoupling transmission device which is applied to the field of mechanical transmission and comprises an outer transmission shaft and an inner transmission shaft which are concentrically arranged, the outer transmission shaft is a hollow shaft, the diameter of the outer transmission shaft is larger than that of the inner transmission shaft, and the inner transmission shaft is arranged in the outer transmission shaft. Walking power and external power are concentric, coaxial and internally and externally driven, the structure is compact, and the space utilization rate is high; dual-power transmission is independent, coupling is avoided, under the working condition that the walking traction load and the external load change in real time, each power transmission line can provide the highest power, and adaptability is high; dual-power concentric decoupling transmission is adopted, and zero emission and zero pollution are realized by adopting electric driving; compared with traditional fuel oil driving, noise and vibration are lower; energy and money are saved; the maintenance is convenient; the starting acceleration response is fast; the simplified speed change mechanism not only meets the requirement of installation space, but also is easy to realize accurate control of the system.

Description

Technical Field

[0001] The utility model relates to the field of mechanical transmission, in particular to a dual-power concentric decoupling transmission device. Background Art

[0002] In order to adapt to the characteristics of fuel engines and meet working conditions, all drives of traditional vehicle transmissions come from the same power source. For example, the walking traction power and PTO working power of traditional fuel tractors both come from the same diesel engine. They cannot be driven completely independently and interfere with each other.

[0003] At present, the gearboxes designed for new energy motor transmission generally adopt a one-to-one power method according to power requirements, and multiple power sources are installed separately, which takes up a large space and has low system integration. In the field of new energy tractor drive, a research institute proposed an integrated coupled gearbox, which uses two low-power motors for coupled transmission. Although it is integrated, the coupling mechanism is complex to control. It can meet the needs of power confluence under a single working condition, but when facing the complex and changeable working conditions of walking traction power and PTO power, the real-time power distribution change is subject to the maximum power limit of a single motor, and the ability to adapt to working conditions is limited.

[0004] A research institute has proposed a method of realizing dual power coupling drive in the same gearbox in the coupling control of electric tractors, where the travel drive and the PTO working system power complement each other using a coupling mechanism. However, there are restrictions on the subsequent power distribution, and additional controllable hydraulic valves, controllable hydraulic pumps, or controllable torque converters and other parts or components must be matched to meet practical applications.

[0005] Therefore, the current decoupling of separate boxes, decoupling of common boxes without coaxiality, and coupling of common boxes cannot meet the application scenarios with high space requirements, and it is necessary to improve them. Utility Model Content

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

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] The utility model comprises an outer transmission shaft and an inner transmission shaft which are arranged concentrically, wherein the outer transmission shaft is a hollow shaft and the diameter of the outer transmission shaft is larger than the diameter of the inner transmission shaft, and the inner transmission shaft is arranged inside the outer transmission shaft; an outer transmission input gear for driving a wheel assembly is arranged on the outer transmission shaft, and the outer transmission input gear is driven by a traveling power through a transmission unit; the inner transmission shaft of an external working part is driven by an inner shaft driving gear, and 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] A further improvement of the utility model is that the transmission unit includes a power input transmission shaft connected to the walking power, a power input driving gear arranged on the power input transmission shaft and a power input intermediate gear whose one side is meshed with the power input driving gear, and the other side of the power input intermediate gear is meshed with the external transmission input gear.

[0010] A further improvement of the utility model is that: the external transmission input gear is respectively connected with the primary driving gear, the third driving gear and the fourth driving gear; the primary driving gear drives the primary driven gear or the second driven gear; the third driving gear drives the third driven gear, and the fourth driving gear drives the fourth driven gear; a first shifting mechanism is provided between the primary driven gear and the second driven gear, and a second shifting mechanism is provided between the third driving gear and the fourth driving gear.

[0011] A further improvement of the utility model is that the transmission structure includes an external input transmission shaft connected to the external power, an external transmission gear arranged on the external input transmission shaft and an external transmission intermediate gear meshing with the external transmission gear, and the external transmission intermediate gear meshes with the internal shaft driving gear.

[0012] A further improvement of the utility model is that the external transmission intermediate gear is arranged on the intermediate gear shaft.

[0013] A further improvement of the utility model is that both ends of the inner transmission shaft are supported by inner shaft support bearings on the housing, and the inner shaft support bearings include a first inner shaft support bearing and a second inner shaft support bearing.

[0014] A further improvement of the utility model is that: the inner transmission shaft is provided with an inner shaft output gear for transmitting torque and rotation speed to the external working parts.

[0015] A further improvement of the utility model is that the external input transmission shaft is connected to a power output additional pump.

[0016] A further improvement of the utility model is that both the external power and the walking power are arranged on the box body.

[0017] A further improvement of the utility model is that an outer shaft support bearing for supporting the outer transmission shaft is provided on the box body, and the outer shaft support bearing includes a first outer shaft support bearing arranged at both ends of the outer transmission shaft, a third outer shaft support bearing and a second outer shaft support bearing arranged in the middle.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are:

[0019] The utility model adopts the concentric and coaxial travel power and external power, and adopts the internal and external drive mode, which has a compact structure and high space utilization. The dual power transmission is independent and does not couple. Under the working conditions where the travel traction load and the external load change in real time, each power transmission route can provide the highest power, and has strong adaptability.

[0020] The utility model is a dual-power concentric decoupled transmission, which uses electric drive to achieve zero emission and zero pollution; it has less noise and vibration than traditional fuel drive; it saves energy and money; it is easy to maintain; and it has fast starting and acceleration response. It achieves simple operation, good energy saving, integrated control, and a simplified speed change mechanism that not only meets the requirements of installation space, but also makes it easy to achieve precise control of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the concentric decoupling transmission of the utility model;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the gearbox of the utility model;

[0024] Figure 4 It is a schematic diagram of the transmission principle structure of the utility model.

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

[0026] The present invention is further described in detail below in conjunction with the embodiments:

[0027] A dual-power concentric decoupling transmission device, such as Figure 1-4 As shown, it includes an outer transmission shaft 110 and an inner transmission shaft 134 which are arranged concentrically, 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 on the axial center portion of the outer transmission shaft 110.

[0028] The outer transmission shaft 110 is driven by the travel power 131 to provide power for the vehicle travel mechanism; the inner transmission shaft 134 is driven by the external power 101 to provide power for the vehicle external machine drive output. The external power 101 and the travel power 131 are both arranged on the box 112, and the external power 101 and the travel power 131 are installed in parallel, concentrically and coaxially, and the internal and external drive modes have a compact structure and high space utilization. It meets the compact installation space requirements of the tractor transmission, realizes system integration and precise control. Moreover, the external power 101 and the travel power 131 are driven independently, do not interfere with each other, and do not couple, which simplifies the gear arrangement of the box 112 and has high transmission efficiency. Under the working conditions where the travel traction load and the external load change in real time, each power transmission route can provide the highest power and has strong adaptability.

[0029] like Figure 3 and Figure 4As shown, the outer transmission shaft 110 is provided with an outer transmission input gear 137 of the driving wheel assembly, the outer transmission input gear 137 is driven by the travel power 131 through the transmission unit, the inner transmission shaft 134 of the external working part is driven by the inner shaft driving gear 133, and the inner shaft driving gear 133 is driven by the external power 101 through the transmission structure; the outer transmission input gear 137 and the inner shaft driving gear 133 are in a coaxial and internal and external drive structure, the travel power 131 drives the outer transmission shaft 110 through the outer transmission input gear 137 to transmit torque and speed, and the external power 101 drives the inner transmission shaft 134 set at the center of the outer transmission shaft 110 through the inner shaft driving gear 133 to transmit torque and speed. Both the external power 101 and the travel power 131 are electrically driven, achieving zero emissions, zero pollution, less noise and vibration; saving energy and money; easy maintenance; fast starting acceleration response. Simple operation, good energy saving, and integrated control are achieved, and the simplified speed change mechanism not only meets the requirements of installation space, but also makes it easy to achieve precise control of the system.

[0030] The transmission unit includes a power input transmission shaft 129 connected to the travel power 131, a power input driving gear 127 provided on the power input transmission shaft 129, and a power input intermediate gear 128 meshing with the power input driving gear 127, and the other side of the power input intermediate gear 128 meshing with the external transmission input gear 137. When the travel power 131 is started, the power input transmission shaft 129 connected to the output shaft of the travel power 131 rotates, and then the power input main gear 127 on the power input transmission shaft 129 rotates, the power input intermediate gear 128 meshing with the power input driving gear 127 rotates, and the external transmission input gear 137 meshing with the other side of the power input intermediate gear 128 rotates.

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

[0032] The three-stage driving gear 121 drives the three-stage driven gear 111, and the four-stage driving gear 113 drives the four-stage driven gear 119. A second shifting mechanism 120 is provided between the three-stage driving gear 121 and the four-stage driving gear 113. The second shifting mechanism 120 is operated to select whether to drive the three-stage driving gear 121 to drive the three-stage driven gear 111 or to drive the four-stage driving gear 113 to drive the four-stage driven gear 119. The wheel assembly is then driven to complete the movement of the tractor.

[0033] The transmission structure includes an external input transmission shaft 105 connected to the external power 101, an external transmission gear 103 arranged on the external input transmission shaft 105, and an external transmission intermediate gear 104 meshing with the external transmission gear 103, and the external transmission intermediate gear 104 meshes with the internal shaft driving gear 133. When the external power 101 is started, the output shaft of the external power 101 rotates to drive the external input transmission shaft 105 connected thereto to rotate, and the external transmission gear 103 arranged on the external input transmission shaft 105 rotates accordingly, and the external transmission intermediate gear 104 meshing therewith rotates, and then the internal shaft driving gear 133 meshing with the external transmission intermediate gear 104 rotates, and the rotation of the internal shaft driving gear 133 drives the internal transmission shaft 134 to rotate, and the internal transmission shaft 134 is provided with an internal shaft output gear 114 for transmitting torque and speed to other external working parts, so as to provide power for the drive output of the external implements of the tractor.

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

[0035] like Figure 3 and Figure 4 As shown, the external input transmission shaft 105 is connected to the power output additional pump 107 to provide the required power for other actuators.

[0036] Finally, it should be noted that the above embodiments are only examples for the purpose of clearly explaining the present invention, and are by no means limiting of the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here, and the obvious changes or modifications derived from them still fall within the scope of protection of the present invention.

Claims

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

2. A dual-power concentric decoupling transmission device according to claim 1, characterized in that: The transmission unit comprises a power input transmission shaft (129) connected to the travel power (131), a power input driving gear (127) arranged on the power input transmission shaft (129), and a power input intermediate gear (128) meshed with the power input driving gear (127) on one side, and the other side of the power input intermediate gear (128) meshed with the external transmission input gear (137).

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

4. A dual-power concentric decoupling transmission device according to claim 1, characterized in that: The transmission structure comprises an external input transmission shaft (105) connected to an external power (101), an external transmission gear (103) arranged on the external input transmission shaft (105), and an external transmission intermediate gear (104) meshing with the external transmission gear (103), wherein the external transmission intermediate gear (104) meshes with an internal shaft driving gear (133).

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

6. A dual-power concentric decoupling transmission device according to claim 4, characterized in that: Both ends of the inner transmission 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. A dual-power concentric decoupling transmission device according to claim 6, characterized in that: The inner transmission shaft (134) is provided with an inner shaft output gear (114) for transmitting torque and rotation speed to an external working component.

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

9. The dual-power concentric decoupling transmission device according to any one of claims 1 to 8, characterized in that: The external power (101) and the walking power (131) are both arranged on the box (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 transmission shaft (110), and the outer shaft support bearing comprises a first outer shaft support bearing (116) arranged at both ends of the outer transmission shaft (110), a third outer shaft support bearing (136) and a second outer shaft support bearing (117) arranged in the middle.

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