Automatic two-gear gearbox for new energy engineering machinery

Abstract

The utility model provides an automatic two-gear gearbox for new energy engineering machinery. The automatic two-gear gearbox for the new energy engineering machinery comprises an input end, a speed reducing mechanism, a torque reducing mechanism and an output end, the input end is provided with a one-way bearing and a centrifugal clutch, the one-way bearing and the centrifugal clutch are in transmission connection with the speed reducing mechanism and the torque reducing mechanism respectively, and the speed reducing mechanism and the torque reducing mechanism are in transmission connection with the output end. And the two motors are in transmission connection with the output end. According to the automatic two-gear gearbox for the new energy engineering machinery, the defects that the structure and the control method are complex, and pause is prone to occurring are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of speed changer, concretely relates to an automatic two-gear gearbox for new energy engineering machinery. BACKGROUND

[0002] With the maturity of new energy electric drive technology, the electric trend of engineering machinery is also gradually obvious, at present, engineering machinery mostly adopts single-stage reducer with fixed speed ratio, the single-stage scheme has the advantages of high transmission efficiency, rich resources and small development difficulty, but the single-stage reducer scheme requires larger motor torque and higher speed, and cannot ensure the best operation state of the motor under complex working conditions. The two-gear gearbox can effectively adjust the output performance of the motor, the two-gear gearbox scheme can reduce the motor output torque, reduce the motor volume and cost, and optimize the motor operation state. However, the two-gear transmission increases the shifting mechanism, and the structure and control method are complex, and jerk is prone to occur. For example, the scheme provided by the utility model with the application number "202322916519.1", the applicant "Zhuzhou Gear Co., Ltd.", and the name "pure electric loader gearbox" is to solve the problem caused by the existence of the shifting fork, and cannot solve the above defects from the root. SUMMARY

[0003] To solve the defects such as complex structure and control method, and easy to appear jerk of the existing two-gear gearbox scheme, the utility model provides an automatic two-gear gearbox for new energy engineering machinery to solve the above problems.

[0004] An automatic two-gear gearbox for new energy engineering machinery, comprising an input end, a reduction mechanism, a torque reduction mechanism and an output end, the input end is provided with a one-way bearing and a centrifugal clutch, both of which are drivingly connected with the reduction mechanism and the torque reduction mechanism respectively, the reduction mechanism and the torque reduction mechanism are both drivingly connected with the output end.

[0005] In a preferred embodiment of the automatic two-gear gearbox for new energy engineering machinery provided by the utility model, the input end is an input shaft connected with the motor output, the one-way bearing is installed in the middle section of the shaft, and the centrifugal clutch is installed at the end of the shaft.

[0006] In a preferred embodiment of the automatic two-gear gearbox for new energy engineering machinery provided by the utility model, the reduction mechanism comprises a plurality of reduction gears, which are arranged around the one-way bearing and are in meshing engagement with the outer wall of the one-way bearing and the output end.

[0007] In a preferred embodiment of the automatic two-gear gearbox for new energy engineering machinery provided by the utility model, the torque reduction mechanism is a planetary torque reduction mechanism, comprising a planet carrier and an outer gear ring, both of which are fixedly connected with the centrifugal clutch and the output end respectively.

[0008] The torsion reduction mechanism comprises a planet carrier, planet gears, a sun gear, an outer gear ring and a bearing, the planet carrier is provided with a plurality of convex shafts at an end face and is respectively provided with the planet gears, inner sides of all the planet gears are engaged with the sun gear, outer sides are engaged with an inner wall of the outer gear ring, the sun gear and the outer gear ring are provided with the bearing for support.

[0009] In a preferred embodiment of the automatic two-gear gearbox for new energy engineering machinery provided by the utility model, the shell end and the shaft end of the centrifugal clutch are respectively fixedly connected with the shaft end part of the input end and fixedly connected with the large end face of the planet carrier.

[0010] In a preferred embodiment of the automatic two-gear gearbox for new energy engineering machinery provided by the utility model, the output end is an output shell, the input end, the speed reduction mechanism and the torsion reduction mechanism are all arranged in the output end, the outer side of the speed reduction mechanism is engaged with the inner wall of the output end, and the outer gear ring penetrates to the outside of the output end and is fixedly connected therewith.

[0011] A control method for the automatic two-gear gearbox for new energy engineering machinery is to control the rotating speed of the input end to select the transmission direction and realize gear shifting.

[0012] Low rotating speed and high load working condition: the rotating speed of the input end is controlled to be low, the one-way bearing is automatically combined, the centrifugal clutch is automatically disconnected, and power is transmitted along the input end-one-way bearing-speed reduction mechanism-output end;

[0013] High rotating speed and low load working condition: the rotating speed of the input end is controlled to be high, the one-way bearing is automatically disconnected, the centrifugal clutch is automatically combined, and power is transmitted along the input end-centrifugal clutch-torsion reduction mechanism-output end.

[0014] Compared with the prior art, the automatic two-gear gearbox for new energy engineering machinery provided by the utility model has the following beneficial effects:

[0015] 1. Compared with the traditional single-stage speed reducer, the scheme provided by the utility model can provide greater torque under low rotating speed and high load working condition, improve power performance, and keep the motor in a high-efficiency interval under high rotating speed and low load working condition, reduce energy consumption and improve economy.

[0016] 2. Compared with the traditional single-stage speed reducer, the scheme provided by the utility model can reduce the motor output torque and reduce the volume and cost of the motor.

[0017] 3. In the scheme provided by the utility model, the one-way bearing and the centrifugal clutch are used in cooperation as a gear shifting mechanism, which has the advantages of simple structure, easy implementation and low failure rate compared with the gear shifting mechanism of the traditional parallel shaft two-gear gearbox.

[0018] 4、The scheme provided by the utility model can realize automatic gear shifting only by motor speed regulation, is simple in control, smooth in gear shifting, and has no power interruption. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of an automatic two-gear gearbox for new energy engineering machinery.

[0020] Reference numerals in the drawing:

[0021] Input end 1, one-way bearing 2, centrifugal clutch 3, speed reduction mechanism 4, planet carrier 51, planet wheel 52, sun gear 53, outer ring gear 54, bearing 55, output end 6, motor 7. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] Please refer to Figure 1 is a structural schematic view of an automatic two-gear gearbox for new energy engineering machinery provided by the utility model.

[0024] The automatic two-gear gearbox for new energy engineering machinery comprises an input end 1, a one-way bearing 2, a centrifugal clutch 3, a speed reduction mechanism 4, a torque reduction mechanism and an output end 6. For the convenience of description, a motor 7 is additionally introduced. The power output shaft of the motor 7 is the input end 1.

[0025] The one-way bearing 2 is installed in the middle section of the shaft of the input end 1, and the centrifugal clutch 3 is installed in the end part of the shaft of the input end 1.

[0026] The inner ring of the one-way bearing 2 is fixed to the input end 1, and the outer ring is provided with a gear ring. The speed reduction mechanism 4 comprises three speed reduction gears, which are arranged around the one-way bearing 2 and engaged with the gear ring of the outer ring of the one-way bearing 2. A support frame is arranged between the three speed reduction gears, which is not drawn in the drawing.

[0027] One end of the centrifugal clutch 3 is a housing fixed to the input end 1, and the other end is a shaft center coaxial with the input end 1. The torque reduction mechanism is a planetary torque reduction mechanism, which comprises a planet carrier 51, a planet wheel 52, a sun gear 53, an outer ring gear 54 and a bearing 55.

[0028] The upper end surface of the planet carrier 51 is fixedly connected with the shaft center of the centrifugal clutch 3, and the lower end surface is provided with three convex shafts and one planet gear 52 respectively. The planet gears 52 are in mesh with the sun gear 53 and the outer gear ring 54 on the outside.

[0029] The output end 6 is an output housing, and the input end 1, the one-way bearing 2, the centrifugal clutch 3, the speed reduction mechanism 4 and the torque reduction mechanism are located in the housing. The upper end of the housing of the output end 6 extends to be close to or abut the motor 7; the inner wall of the middle section of the housing is provided with a gear ring which is in mesh with the speed reduction gear of the speed reduction mechanism 4; and the lower end of the housing is contracted in size and is fixedly connected with the outer gear ring 54.

[0030] The one-way bearing 2 works in one-way transmission. When the rotating speed of the input end 1 is greater than that of the output end 6, the one-way bearing 2 normally transmits; when the rotating speed of the input end 1 is less than that of the output end 6, the one-way bearing 2 idles and cannot transmit, thereby forming a disconnected effect.

[0031] The centrifugal clutch 3 works as follows: when the rotating speed is low, the pawl is contracted and the inside and outside are disconnected; when the rotating speed is high, the pawl is thrown away and the inside and outside are connected. When the rotating speed of the input end 1 is relatively large, the centrifugal clutch 3 is connected and normally transmits; when the rotating speed of the input end 1 is relatively low, the centrifugal clutch 3 is disconnected and cannot transmit.

[0032] The overall working principle of the automatic two-gear transmission for new energy engineering machinery is that the rotating speed of the input end 1 is controlled to select the transmission direction and realize gear shifting.

[0033] When the rotating speed of the input end 1 is controlled to be low, the one-way bearing 2 is automatically connected, the centrifugal clutch 3 is automatically disconnected, and the power is transmitted along the input end 1-one-way bearing 2-speed reduction mechanism 4-output end 6. That is, a low-speed gear suitable for a low-speed high-load working condition.

[0034] When the rotating speed of the input end 1 is controlled to be high, the one-way bearing 2 is automatically disconnected, the centrifugal clutch 3 is automatically connected, and the power is transmitted along the input end 1-centrifugal clutch 3-torque reduction mechanism-output end 6. That is, a high-speed gear suitable for a high-speed low-load working condition.

[0035] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process conversion or direct or indirect application in other related technical fields based on the content of the present application is also included in the patent protection range of the present application.

Claims

1. An automatic two-speed gearbox for a new energy construction machine, characterized in that: The application relates to a transmission mechanism, which comprises an input end, a speed reduction mechanism, a torque reduction mechanism and an output end.

2. Double range automatic gearbox for new energy construction machines according to claim 1, characterized in that: The input end is an input shaft connected with the output of a motor, the one-way bearing is arranged in the middle section of the shaft, and the centrifugal clutch is arranged at the end of the shaft.

3. The automatic two-speed gearbox for new energy engineering machinery according to claim 2, characterized in that: The speed reduction mechanism comprises a plurality of speed reduction gears, which are arranged around the one-way bearing and are in mesh with the outer wall of the one-way bearing and the output end.

4. The automatic two-speed gearbox for new energy engineering machinery according to claim 3, characterized in that: The torque reduction mechanism is a planetary torque reduction mechanism, which comprises a planet carrier and an outer gear ring, and the two are fixedly connected with the centrifugal clutch and the output end respectively.

5. The automatic two-speed gearbox for new energy engineering machinery according to claim 4, characterized in that: The torque reduction mechanism comprises a planet carrier, a planet wheel, a sun gear, an outer gear ring and a bearing, the end surface of the planet carrier is provided with a plurality of convex shafts, the planet wheel is arranged on each convex shaft, the inner side of all the planet wheels is in mesh with the sun gear, the outer side of all the planet wheels is in mesh with the inner wall of the outer gear ring, and the sun gear and the outer gear ring are supported by the bearing.

6. The automatic two-speed gearbox for new energy engineering machinery according to claim 5, characterized in that: The shell end and the shaft end of the centrifugal clutch are fixedly connected with the end of the shaft of the input end and the large end surface of the planet carrier respectively.

7. The automatic two-speed gearbox for a new energy construction machine according to any one of claims 4 to 6, characterized by: The output end is an output shell, and the input end, the speed reduction mechanism and the torque reduction mechanism are arranged in the output end.

8. The automatic two-speed gearbox for new energy engineering machinery according to claim 7, characterized in that: The outer side of the speed reduction mechanism is in mesh with the inner wall of the output end, and the outer gear ring penetrates through the output end and is fixedly connected with the output end.

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