Hydraulic gear shifting electric drive gearbox for engineering machinery

Abstract

The utility model discloses a hydraulic shifting electric drive gearbox for engineering machinery, which comprises a gearbox body, a power input shaft is rotatably mounted on the side wall of the gearbox body, a power input gear is mounted at the inner end of the power input shaft, the power input gear is in meshed connection with a pump driven gear and a driven gear, the pump driven gear is mounted on a pump driven shaft, and the driven gear is mounted on the pump driven shaft. The driven gear is mounted on the clutch shaft A, and the pump driven shaft and the clutch shaft A are rotationally mounted in the gearbox body; 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. High speed and low speed can be achieved through hydraulic control, the control complexity in the gear shifting process is reduced, a power take-off opening of the walking pump is reserved in the gearbox body, and connection between the walking pump and the gearbox body is facilitated.

Description

Technical Field

[0001] This utility model relates to an electric drive gearbox with hydraulic shifting for engineering machinery, belonging to the technical field of electric drive systems. 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] The core of electric drive transmission shifting is to achieve speed synchronization through active speed regulation of the motor and to precisely control the interruption and restoration of power using an electronic control system. The entire process is fully automated by algorithms without driver intervention. This shifting method has the following technical problems:

[0004] The system has high control complexity and strong algorithm dependence. Active speed regulation of the motor requires additional electrical energy, which will reduce the overall efficiency of the system, especially when the speed is adjusted over a wide range.

[0005] Existing electric drive transmissions typically do not retain a power take-off port for the travel pump, which makes the connection process between the travel pump and the electric drive transmission quite inconvenient.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] To address the shortcomings of the prior art, this utility model provides an electric drive gearbox for engineering machinery with hydraulic shifting. High and low speeds can be achieved through hydraulic control, reducing the control complexity of the shifting process. The gearbox body retains the power take-off port of the travel pump, facilitating the connection between the travel pump and the gearbox body.

[0008] To solve the above technical problems, the present invention adopts the following technical solution:

[0009] An electric drive gearbox for hydraulic shifting in engineering machinery includes a gearbox body. A power input shaft is rotatably mounted on the side wall of the gearbox body. A power input gear is mounted on the inner end of the power input shaft. The power input gear meshes with a pump driven gear and a driven gear. The pump driven gear is mounted on a pump driven shaft. The driven gear is mounted on a clutch shaft A. The pump driven shaft and clutch shaft A are rotatably mounted in the gearbox body. 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.

[0010] Furthermore, the outer end of the power input shaft is connected to the motor.

[0011] Furthermore, the motor is fixedly installed via a connecting plate on the outer wall of the gearbox.

[0012] Furthermore, the clutch shaft A has a clutch shaft B and an output shaft arranged parallel to it on its side.

[0013] Furthermore, a clutch with a working chamber is installed on the clutch shaft A, a single-gear clutch ring gear A is provided on one side of the clutch, and a disc hub gear A is provided on the other side of the clutch.

[0014] Furthermore, a clutch with a working chamber is installed on the clutch shaft B. A single-gear clutch gear ring B is provided on one side of the clutch, which is meshed and connected to the single-gear clutch gear ring A. A disc gear B is provided on the other side of the clutch, and a disc gear is provided on the side of the disc gear B, which is meshed and connected to the disc gear A.

[0015] Furthermore, an output gear that meshes with the hub gear B is mounted on the output shaft.

[0016] Furthermore, output flanges are provided at both ends of the output shaft.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0018] The gearbox in this invention adopts a two-speed structure with high and low speeds; through hydraulic control, hydraulic high and low speed drive can be realized, reducing control complexity and dependence on algorithms, and ensuring the overall efficiency of the system.

[0019] The power take-off port for the travel pump is retained, and the travel pump can be directly mounted onto the gearbox body, making assembly convenient. The travel pump works along with the travel motor.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] 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-single-gear clutch gear ring A, 12-driven gear, 13-disc hub gear A, 14-single-gear clutch gear ring B, 15-disc hub gear B, 16-disc gear, 17-output shaft, 18-output gear, 19-output flange. Detailed Implementation

[0023] 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.

[0024] like Figure 1 As shown, this utility model provides an electric drive gearbox for hydraulic 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. A power input gear 5 is mounted on the inner end of the power input shaft 2. The power input gear 5 is meshed with a pump driven gear 7 and a driven gear 12. The pump driven gear 7 is mounted on a pump driven shaft 6, and the driven gear 12 is mounted on a clutch shaft A9. The pump driven shaft 6 and the clutch shaft A9 are rotatably mounted inside the gearbox body 1.

[0025] The outer end of the power input shaft 2 is connected to the motor 3, and the motor 3 is fixedly installed through the connecting plate 4 on the outer wall of the gearbox body 1.

[0026] One end of the pump driven shaft 6 is provided with a power take-off port that is connected to the travel pump 8, and the travel pump 8 is fixedly installed on the outer wall of the gearbox body 1.

[0027] The clutch shaft A9 has a clutch shaft B10 and an output shaft 17 arranged parallel to it on its side.

[0028] A clutch with a working chamber is installed on the clutch shaft A9. A single-gear clutch ring gear A11 is provided on one side of the clutch, and a disc hub gear A13 is provided on the other side of the clutch.

[0029] A clutch with a working chamber is installed on the clutch shaft B10. A single-gear clutch gear ring B14 is provided on one side of the clutch. The single-gear clutch gear ring B14 is meshed and connected to the single-gear clutch gear ring A11. A disc gear B15 is provided on the other side of the clutch. A disc gear 16 is provided on the side of the disc gear B15. The disc gear 16 is meshed and connected to the disc gear A13.

[0030] The output shaft 17 is equipped with an output gear 18 that meshes with the disc hub gear B15, and output flanges 19 are provided at both ends of the output shaft 17.

[0031] The power transmission route of this utility model is as follows:

[0032] 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.

[0033] 1st gear: Power input gear 5 → Driven gear 12 → Disc hub gear A13 → Disc gear 16 → Disc hub gear B15 → Output gear 18 → Output flange 19;

[0034] 2nd gear: Power input gear 5 → Driven gear 12 → Single gear clutch gear ring A11 → Single gear clutch gear ring B14 → Disc hub gear B15 → Output gear 18 → Output flange 19.

[0035] The gearbox in this invention adopts a two-speed structure with high and low speeds; hydraulic control enables high and low speed hydraulic drive. A power take-off port for the travel pump is retained, allowing the travel pump to be directly mounted onto the gearbox body. The travel pump operates in conjunction with the travel motor.

[0036] 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 with hydraulic shifting for engineering machinery, characterized in that: The gearbox includes a gearbox housing (1), on which a power input shaft (2) is rotatably mounted. A power input gear (5) is mounted on the inner end of the power input shaft (2). The power input gear (5) meshes with a pump driven gear (7) and a driven gear (12). The pump driven gear (7) is mounted on a pump driven shaft (6), and the driven gear (12) is mounted on a clutch shaft A (9). The pump driven shaft (6) and the clutch shaft A (9) are rotatably mounted inside the gearbox housing (1). 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).

2. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 1, characterized in that: The outer end of the power input shaft (2) is connected to the motor (3).

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

4. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 1, characterized in that: The clutch shaft A (9) has a clutch shaft B (10) and an output shaft (17) arranged parallel to it on its side.

5. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 4, characterized in that: A clutch with a working chamber is installed on the clutch shaft A (9). A single-gear clutch ring gear A (11) is provided on one side of the clutch, and a disc hub gear A (13) is provided on the other side of the clutch.

6. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 5, characterized in that: The clutch shaft B (10) is equipped with a clutch having a working chamber. A single-gear clutch gear ring B (14) is provided on one side of the clutch. The single-gear clutch gear ring B (14) is meshed with the single-gear clutch gear ring A (11) for transmission. A disc hub gear B (15) is provided on the other side of the clutch. A disc gear (16) is provided on the side of the disc hub gear B (15). The disc gear (16) is meshed with the disc hub gear A (13) for transmission.

7. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 6, characterized in that: An output gear (18) is mounted on the output shaft (17) and meshes with the hub gear B (15).

8. The hydraulic shifting electric drive gearbox for engineering machinery as described in claim 7, characterized in that: Output flanges (19) are provided at both ends of the output shaft (17).

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