Ultra-low-gear electric drive transmission system for engineering machinery

Abstract

The ultra-low-gear electric drive transmission system for the engineering machinery comprises a gearbox body, a sun wheel shaft, a clutch shaft and an output shaft which are sequentially in transmission connection through gears are installed inside the gearbox body, the sun wheel shaft is connected with a motor outside the gearbox body, and a planetary speed reduction mechanism and an input gear are installed on the sun wheel shaft. A clutch is installed on the clutch shaft, two working cavities are symmetrically formed in the clutch in the left-right direction, and disc hub gears are arranged at the two ends of the clutch respectively. The output shaft comprises two half shafts which are coaxially arranged, two output gears are fixedly installed on the longer half shaft, and the two output gears are connected with the two disc hub gears in a meshed mode. According to the ultra-low-gear electric drive transmission system for the engineering machinery, the rotating speed of the motor can be reduced through cooperation of the two speed reducing mechanisms, the ultra-low-gear function is achieved, and specific working condition requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to an ultra-low gear electric drive transmission system for engineering machinery and belongs to the electric drive transmission system technical field. BACKGROUND

[0002] The electric drive gearbox is a device for converting electric energy into mechanical energy, which comprises a motor and a gear transmission system.

[0003] In the prior art, the electric drive gearbox applied to engineering machinery has the following technical problems in use:

[0004] The motor speed is simply reduced by the gear structure inside the gearbox, and sometimes the reduction effect cannot achieve the requirement of realizing ultra-low gear, resulting in that the gearbox does not have the function of ultra-low gear and cannot meet the specific working condition requirement.

[0005] In summary, the prior art obviously has inconvenience and defects in actual use, so it is necessary to improve. INVENTION CONTENTS

[0006] The utility model provides an ultra-low gear electric drive transmission system for engineering machinery, which can reduce the motor speed through the cooperation of two kinds of speed reduction mechanisms and realize the function of ultra-low gear to meet the specific working condition requirement.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] An ultra-low gear electric drive transmission system for engineering machinery comprises a gearbox body, a sun gear shaft, a clutch shaft and an output shaft which are connected in sequence by gears and are installed inside the gearbox body, the sun gear shaft is connected with a motor outside the gearbox body, a planetary speed reduction mechanism and an input gear are installed on the sun gear shaft;

[0009] A clutch is installed on the clutch shaft, two working cavities are symmetrically arranged in the clutch, and disc hub gears are arranged at both ends of the clutch;

[0010] The output shaft comprises two half shafts arranged coaxially, two output gears are fixedly installed on the longer half shaft, and the two output gears are meshed and connected with the two disc hub gears.

[0011] Further, the planetary speed reduction mechanism is arranged close to the power input end of the sun gear shaft.

[0012] Further, a power transmission gear is also installed on the clutch shaft, and the power transmission gear is meshed and connected with the input gear.

[0013] Further, a gear ring which is meshed with the input gear is arranged outside the clutch.

[0014] Further, the opposite inner ends of the two half shafts are provided with left and right sliding engagement sleeves, and the engagement sleeves are connected with the shift fork mechanism.

[0015] Further, the opposite outer ends of the two half shafts are provided with flanges for power output.

[0016] Further, the planetary reduction mechanism comprises a sun gear which is in an integral structure with the sun gear shaft.

[0017] Further, the sun gear is provided with a plurality of planetary gears on the periphery, the side portions of the planetary gears are connected through a planet carrier, the periphery of the planetary gears is engaged with a ring gear, and the ring gear is fixedly installed inside the gearbox body.

[0018] Compared with the prior art, the utility model has the following advantages after adopting the above technical scheme:

[0019] The utility model discloses a planetary reduction mechanism is installed at the power input to reduce the motor input rotating speed, and then the gearbox internal gear structure is used to reduce the rotating speed, and the motor rotating speed is reduced through the cooperation of two reduction mechanisms, so that the function of super low gear is realized, and the large torque output is used to meet the specific working condition demand.

[0020] The utility model discloses a hydraulic oil control clutch to realize gear shifting, and the shift fork mechanism is used to drive the engagement sleeve to slide left and right to realize the switching between two drive and four drive modes.

[0021] The utility model will be described in detail below in combination with the drawings and examples. DRAWINGS

[0022] Figure 1 It is the structural schematic diagram of example 1.

[0023] Figure 2 It is the structural schematic diagram of example 2.

[0024] In the drawing, 1 is the gearbox body, 2 is the sun gear shaft, 3 is the clutch shaft, 4 is the output shaft, 5 is the planetary gear, 6 is the planet carrier, 7 is the ring gear, 8 is the input gear, 9 is the power transmission gear, 10 is the clutch, 11 is the disc hub gear, 12 is the engagement sleeve, 13 is the flange, and 14 is the output gear. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described in combination with the drawings.

[0026] Example 1

[0027] As Figure 1The utility model provides an ultra low gear electric drive system for engineering machinery, including gearbox body 1, the inside installation of gearbox body 1 has the sun gear shaft 2, clutch shaft 3 and output shaft 4 connected by gear transmission in turn, the sun gear shaft 2 is connected with the motor outside gearbox body 1, is installed with planetary reducer and input gear 8 on the sun gear shaft 2, and planetary reducer is close to the power input end setting of sun gear shaft 2.

[0028] The planetary reducer comprises a sun gear, the sun gear is an integral structure with the sun gear shaft 2, a plurality of planetary gears 5 are engaged with the periphery of the sun gear, the side portions of the planetary gears 5 are connected through a planet carrier 6, the periphery of the planetary gears 5 is engaged with a ring gear 7, and the ring gear 7 is fixedly installed in the gearbox body 1.

[0029] The planetary reducer in the utility model utilizes the engagement and rotation of gears to increase the rotational resistance of the sun gear shaft 2, and then reduces the input rotating speed of the motor.

[0030] The clutch shaft 3 is provided with a power transmission gear 9 and a clutch 10, the power transmission gear 9 is engaged with the input gear 8, the clutch 10 has two symmetrical working cavities, the clutch 10 is provided with disc hub gears 11 at both ends, and the clutch 10 is controlled by hydraulic oil to realize gear shifting.

[0031] The output shaft 4 comprises two half shafts arranged coaxially, two output gears 14 are fixedly installed on the longer half shaft, and the two output gears 14 are engaged with the two disc hub gears 11.

[0032] The opposite inner ends of the two half shafts are provided with engagement sleeves 12 that can slide left and right, the engagement sleeves 12 are connected with a shift fork mechanism, the shift fork mechanism drives the engagement sleeves 12 to slide to realize switching between two-wheel drive and four-wheel drive modes.

[0033] The opposite outer ends of the two half shafts are provided with flanges 13 for power output.

[0034] The specific working principle of the utility model is as follows:

[0035] The planetary reducer is installed at the power input end to reduce the input rotating speed of the motor, and then the internal gear structure of the gearbox is used for speed reduction, so that the rotating speed of the motor is reduced through the cooperation of the two speed reduction mechanisms, the function of ultra low gear is realized, and the selection cost of the motor is reduced.

[0036] The utility model realizes gear shifting by controlling the clutch through hydraulic oil, and realizes switching between two-wheel drive and four-wheel drive modes by driving the engagement sleeves to slide left and right through the shift fork mechanism.

[0037] Example 2

[0038] As Figure 2As shown, the utility model provides a kind of ultra-low grade electric drive transmission system for engineering machinery, and the difference between embodiment 2 and embodiment 1 is:

[0039] The clutch shaft 3 in embodiment 1 is provided with power transmission gear 9 and clutch 10, and the power transmission gear 9 is connected with the input gear 8.

[0040] And the clutch shaft 3 in embodiment 2 is provided with clutch 10, and the clutch 10 is provided with gear ring outside which is engaged with the input gear 8.

[0041] Compared with embodiment 1, embodiment 2 can reduce a gear layout, so that the space layout is more compact and reasonable.

[0042] The above is an example of the best embodiment of the utility model, wherein the parts not described in detail are the common knowledge of ordinary skilled in the art. The protection scope of the utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. An ultra-low profile electric drive system for an engineering machine, characterized by: The gearbox body (1) is internally provided with a sun shaft (2), a clutch shaft (3) and an output shaft (4) which are sequentially connected by gears, the sun shaft (2) is connected with a motor outside the gearbox body (1), and the sun shaft (2) is provided with a planetary reduction mechanism and an input gear (8); The clutch shaft (3) is provided with a clutch (10), the clutch (10) is internally provided with two symmetrical working cavities, and the clutch (10) is provided with disc hub gears (11) at two ends thereof; The output shaft (4) comprises two half shafts which are coaxially arranged, two output gears (14) are fixedly arranged on the longer half shaft, and the two output gears (14) are in meshing connection with the two disc hub gears (11).

2. The ultra-low profile electric drive system for an engineered machine of claim 1, wherein: The planetary reduction mechanism is arranged close to the power input end of the sun shaft (2).

3. The ultra-low profile electric drive system for an engineered machine of claim 1, wherein: The clutch shaft (3) is further provided with a power transmission gear (9), and the power transmission gear (9) is in meshing connection with the input gear (8).

4. The ultra-low profile electric drive system for an engineered machine of claim 1, wherein: The clutch (10) is externally provided with a gear ring which is in meshing connection with the input gear (8).

5. The ultra-low profile electric drive system for an engineered machine of claim 1, wherein: The facing inner ends of the two half shafts are provided with meshing sleeves (12) which can slide leftward and rightward, and the meshing sleeves (12) are connected with a yoke mechanism.

6. The ultra-low profile electric drive system for an engineered machine of claim 5, wherein: The facing outer ends of the two half shafts are both provided with flanges (13) which are used for power output.

7. The ultra-low profile electric drive system for an engineered machine of claim 1, wherein: The planetary reduction mechanism comprises a sun gear, and the sun gear and the sun shaft (2) are in an integrated structure.

8. The ultra-low profile electric drive system for an engineered machine of claim 7, wherein: The sun gear is peripherally provided with a plurality of planetary gears (5), the planetary gears (5) are connected through a planet carrier (6), the periphery of the planetary gear (5) is in meshing connection with a gear ring (7), and the gear ring (7) is fixedly arranged in the gearbox body (1).

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