Hydraulic reversing and gear shifting electric drive gearbox for engineering machinery

Abstract

The utility model discloses a hydraulic reversing and shifting electrically-driven gearbox for engineering machinery, which comprises a gearbox body, a power input shaft is rotatably mounted on the side wall of the gearbox body, the inner end of the power input shaft is in transmission connection with a pump driven shaft, a clutch shaft A and a clutch shaft B through gears, and the outer end of the power input shaft is connected with a motor. One end of the pump driven shaft is provided with a power take-off port connected with a walking pump, and the walking pump is fixedly installed on the outer wall of the gearbox body. The axis of the power input shaft is parallel to the pump driven shaft, the clutch shaft A and the clutch shaft B. An output shaft parallel to the clutch shaft B is arranged on the side portion of the clutch shaft B. Hydraulic reversing and hydraulic gear shifting can be achieved, the pressure of an electrical system is remarkably reduced, the continuous heat dissipation capacity is achieved, overheating of the motor caused by frequent reversing is avoided, and the hydraulic gear shifting hydraulic system is suitable for long-time high-load operation.

Description

Technical Field

[0001] This utility model relates to an electric drive gearbox for hydraulic reversing and shifting in engineering machinery, belonging to the field of electric drive gearbox technology. Background Technology

[0002] The electric drive gearbox is a key component of an electric drive system. It is responsible for transmitting power from the electric motor to the wheels or other drive devices, while simultaneously achieving different speeds and torque outputs to meet the varying driving needs of the vehicle or equipment. Electric drive gearboxes offer advantages such as compact structure, high efficiency, and low noise, and are widely used in electric vehicles, electric construction machinery, and other fields.

[0003] Currently, electric drive transmissions typically use motor reversal to achieve commutation (forward / reverse), which presents the following technical problems: increased stress on the electrical system, such as the instantaneous high current putting a strain on the battery and inverter, potentially affecting their lifespan in the long run. Furthermore, frequent reversals may subject the motor windings to more thermal stress, thus impacting reliability.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] This utility model addresses the shortcomings of the prior art by providing an electric drive gearbox for hydraulic reversing and shifting in engineering machinery. It can realize hydraulic reversing and shifting, significantly reduce the pressure on the electrical system, has continuous heat dissipation capabilities, avoids overheating of the motor due to frequent reversing, and is suitable for long-term high-load operation.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] An electric drive gearbox for hydraulic reversing and shifting in engineering machinery includes a gearbox body. A power input shaft is rotatably mounted on the side wall of the gearbox body. The inner end of the power input shaft is connected to a pump driven shaft, a clutch shaft A, and a clutch shaft B via gears. The outer end of the power input shaft is connected to a motor. One end of the pump driven shaft is provided with a power take-off port connected to a travel pump. The travel pump is fixedly mounted on the outer wall of the gearbox body. The axis of the power input shaft is parallel to the pump driven shaft, clutch shaft A, and clutch shaft B, and an output shaft parallel to it is provided on the side of clutch shaft B.

[0008] Furthermore, the motor is fixedly installed via a connecting plate on the outer wall of the gearbox body.

[0009] Furthermore, a power input gear is mounted on the inner end of the power input shaft.

[0010] Furthermore, a pump driven gear is mounted on the pump driven shaft, which meshes with the power input gear for transmission.

[0011] Furthermore, a clutch with two working chambers is installed on the clutch shaft A, a clutch gear ring A is provided in the middle of the clutch, one end of the clutch is connected to a disc hub gear A, the disc hub gear A meshes with the power input gear, and the other end of the clutch is connected to a disc hub gear B.

[0012] Furthermore, a clutch with two working chambers is installed on the clutch shaft B. A clutch gear ring B is provided in the middle of the clutch. The clutch gear ring B meshes with the clutch gear ring A for transmission. One end of the clutch is connected to a disc gear C, which meshes with the power input gear for transmission. The other end of the clutch is connected to a disc gear D, and a disc gear that meshes with the disc gear B is provided on the side of the disc gear D.

[0013] Furthermore, an output gear that meshes with the disc hub gear D is mounted on the output shaft.

[0014] Furthermore, output flanges are provided at both ends of the output shaft.

[0015] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0016] The gearbox in this utility model adopts a two-speed structure with high and low speeds; through hydraulic control, it can realize hydraulic high and low speed drive, hydraulic forward and reverse, and significantly reduce the pressure of the electrical system through hydraulic reversing and hydraulic shifting, and has continuous heat dissipation capacity to avoid the motor from overheating due to frequent reversing, making it suitable for long-term high-load operation.

[0017] This utility model retains the power take-off port for providing the walking pump, which can be directly assembled onto the housing, making the installation process convenient. The walking pump works along with the operation of the motor.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram, 1-gearbox body, 2-power input shaft, 3-motor, 4-connecting disc, 5-power input gear, 6-pump driven shaft, 7-pump driven gear, 8-travel pump, 9-clutch shaft A, 10-clutch shaft B, 11-clutch ring gear A, 12-disc hub gear A, 13-disc hub gear B, 14-clutch ring gear B, 15-disc hub gear C, 16-disc hub gear D, 17-disc gear, 18-output shaft, 19-output gear, 20-output flange. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0022] like Figure 1 As shown, this utility model provides an electric drive gearbox for hydraulic reversing and shifting in engineering machinery, including a gearbox body 1. A power input shaft 2 is rotatably mounted on the side wall of the gearbox body 1. The inner end of the power input shaft 2 is connected to the pump driven shaft 6, the clutch shaft A9 and the clutch shaft B10 through gears. The outer end of the power input shaft 2 is connected to the motor 3. One end of the pump driven shaft 6 is provided with a power take-off port connected to a travel pump 8. The travel pump 8 is fixedly mounted on the outer wall of the gearbox body 1.

[0023] The axis of the power input shaft 2 is arranged parallel to the pump driven shaft 6, the clutch shaft A9 and the clutch shaft B10, and the clutch shaft B10 has an output shaft 18 parallel to it on its side.

[0024] The motor 3 is fixedly installed via a connecting plate 4 on the outer wall of the gearbox body 1.

[0025] The inner end of the power input shaft 2 is equipped with a power input gear 5.

[0026] The pump driven shaft 6 is equipped with a pump driven gear 7 that meshes with the power input gear 5.

[0027] A clutch with two working chambers is installed on the clutch shaft A9. A clutch gear ring A11 is provided in the middle of the clutch. One end of the clutch is connected to a disc hub gear A12, which meshes with the power input gear 5 for transmission. The other end of the clutch is connected to a disc hub gear B13.

[0028] A clutch with two working chambers is installed on the clutch shaft B10. A clutch gear ring B14 is provided in the middle of the clutch. The clutch gear ring B14 meshes with the clutch gear ring A11. One end of the clutch is connected to a disc gear C15, which meshes with the power input gear 5. The other end of the clutch is connected to a disc gear D16. A disc gear 17 that meshes with the disc gear B13 is provided on the side of the disc gear D16.

[0029] The output shaft 18 is equipped with an output gear 19 that meshes with the disc hub gear D16, and output flanges 20 are provided at both ends of the output shaft 18.

[0030] The power transmission route of this utility model is as follows:

[0031] The power transmission route from motor 3 to the traveling pump 8 is as follows: power input gear 5 → pump driven gear 7 → pump driven shaft 6 → traveling pump 8. The traveling pump 8 rotates as the motor 3 rotates.

[0032] Forward 1st gear: Power input gear 5 → Disc hub gear A12 → Disc hub gear B13 → Disc gear 17 → Disc hub gear D16 → Output gear 19 → Output flange 20;

[0033] Forward 2nd gear: Power input gear 5 → Disc hub gear A12 → Clutch gear ring A11 → Clutch gear ring B14 → Disc hub gear D16 → Output gear 19 → Output flange 20;

[0034] Reverse 1st gear: Power input gear 5 → Disc hub gear C15 → Clutch gear ring B14 → Clutch gear ring A11 → Disc hub gear B13 → Disc gear 17 → Disc hub gear D16 → Output gear 19.

[0035] Reverse 2 gears: Power input gear 5 → Hub gear C15 → Hub gear D16 → Output gear 19.

[0036] The gearbox adopts a two-speed structure with high and low speeds; through hydraulic control, it can realize hydraulic high and low speed drive, hydraulic forward and reverse.

[0037] This utility model retains the power take-off port for providing the walking pump, which can be directly assembled onto the housing, making the installation process convenient. The walking pump works along with the operation of the motor.

[0038] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. An electric drive gearbox for hydraulic reversing and shifting in engineering machinery, characterized in that: The gearbox includes a gearbox housing (1), on which a power input shaft (2) is rotatably mounted. The inner end of the power input shaft (2) is connected to the pump driven shaft (6), clutch shaft A (9) and clutch shaft B (10) via gears. The outer end of the power input shaft (2) is connected to a motor (3). One end of the pump driven shaft (6) is provided with a power take-off port connected to a travel pump (8). The travel pump (8) is fixedly mounted on the outer wall of the gearbox housing (1). The axis of the power input shaft (2) is parallel to the pump driven shaft (6), clutch shaft A (9) and clutch shaft B (10), and the side of the clutch shaft B (10) is provided with an output shaft (18) parallel to it.

2. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 1, characterized in that: The motor (3) is fixedly installed via a connecting plate (4) on the outer wall of the gearbox body (1).

3. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 1, characterized in that: The inner end of the power input shaft (2) is equipped with a power input gear (5).

4. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 3, characterized in that: The pump driven shaft (6) is equipped with a pump driven gear (7) that meshes with the power input gear (5).

5. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 3, characterized in that: The clutch shaft A (9) is equipped with a clutch with two working chambers. The clutch is provided with a clutch gear ring A (11) in the middle. One end of the clutch is connected to a disc hub gear A (12). The disc hub gear A (12) meshes with the power input gear (5) for transmission. The other end of the clutch is connected to a disc hub gear B (13).

6. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 5, characterized in that: The clutch shaft B (10) is equipped with a clutch with two working chambers. The clutch has a clutch gear ring B (14) in the middle. The clutch gear ring B (14) meshes with the clutch gear ring A (11) for transmission. One end of the clutch is connected to a disc gear C (15). The disc gear C (15) meshes with the power input gear (5) for transmission. The other end of the clutch is connected to a disc gear D (16). The side of the disc gear D (16) is provided with a disc gear (17) that meshes with the disc gear B (13) for transmission.

7. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 1, characterized in that: An output gear (19) is mounted on the output shaft (18) and meshes with the hub gear D (16).

8. The electric drive gearbox for hydraulic reversing and shifting in engineering machinery as described in claim 7, characterized in that: Output flanges (20) are provided at both ends of the output shaft (18).

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