Forklift electric drive assembly double-motor reduction gearbox

Abstract

The utility model relates to the technical field of motor reduction gearbox discloses a double motor reduction gearbox of forklift electric drive assembly, including the shell, the inside of shell is provided with the oil cavity, is used for to the inside of oil cavity adds lubricating oil, lubricates to one reduction gear set and second reduction gear set together, the inside of oil cavity is provided with one reduction gear set and second reduction gear set respectively, just the one reduction gear set and second reduction gear set between be provided with the anti -wave board, through the integration two sets of reduction gear set, share the same oil cavity and lubricating system, reduced the shell material consumption, reduce overall volume, promote space utilization, moreover, through the anti -wave board separates the inside of oil cavity one, second reduction gear set, effectively avoid two sets of gear reverse operation produced lubricating oil eddy current and dead zone, in addition, cooperate with the arc fairlead and direct the lubricating oil that gear rotation took part to the meshing area above reduction gear, optimize lubrication effect.

Description

Technical Field

[0001] This utility model relates to the field of motor gearbox technology, and in particular to a dual-motor gearbox for a forklift electric drive assembly. Background Technology

[0002] The forklift's travel system is powered by a servo motor. After the gearbox reduces speed and increases torque, the power is transmitted to the output shaft system to drive the forklift to complete actions such as walking and steering. It needs to meet the speed and torque matching requirements under dynamic loads.

[0003] The forklift's hydraulic system uses another servo motor, which, after being reduced in speed by a gearbox, drives the hydraulic pump to convert mechanical energy into hydraulic energy, providing stable pressure and flow for hydraulic actuators such as fork lifting and mast tilting.

[0004] Among them, the gearbox, as the core of power adaptation, completes the conversion from high speed and low torque of the motor to low speed and high torque of the actuator through gear meshing, thus solving the problem of power characteristic mismatch.

[0005] However, in existing forklift electric drive assemblies, the power systems driving the travel and hydraulic pumps mostly adopt an independent gearbox design. The travel motor corresponds to one set of reduction gears, and the hydraulic pump motor is matched with another set of independent gearboxes. The two systems are arranged separately through pipelines or brackets. This design not only requires separate lubrication, increasing the overall structural volume and assembly complexity, but also increases the later maintenance costs. At the same time, the power transmission paths of the travel and hydraulic pumps are dispersed, resulting in low integration of the forklift electric drive assembly and occupying a large amount of internal space in the chassis. Utility Model Content

[0006] Purpose of the utility model: The purpose of this utility model is to provide a dual-motor reduction gearbox for a forklift electric drive assembly to solve the above-mentioned shortcomings in the prior art.

[0007] Technical solution: A dual-motor gearbox for a forklift electric drive assembly includes a housing. An oil chamber is provided inside the housing for adding lubricating oil to lubricate both a first reduction gear set and a second reduction gear set. The first and second reduction gear sets are respectively arranged inside the oil chamber, and a baffle is provided between the first and second reduction gear sets to separate them.

[0008] As a further description of the above technical solution: A second guide plate with an arc-shaped profile is provided on the side of the wave deflector near the first reduction gear set, located above the first reduction gear set.

[0009] As a further description of the above technical solution: a first guide plate with an arc-shaped profile is also provided on the side wall of the anti-wave plate near the second reduction gear set, and the first guide plate is located above the second reduction gear set.

[0010] As a further description of the above technical solution: a magnet is respectively provided below the first guide plate and the second guide plate, and the two ends of the magnet are connected to the rotating shaft, which is connected to the wave deflector plate through the connecting block.

[0011] As a further description of the above technical solution: the wave deflector and the outer shell are arranged in a semi-enclosed manner.

[0012] As a further description of the above technical solution: the outer shell is connected to a bridge housing via a flange, and an output end gear is provided on the inner side of the bridge housing, and the output end gear is connected to the first reduction gear set via a transmission gear.

[0013] As a further description of the above technical solution: the first reduction gear set is rotatably connected to the inside of the outer casing through the second bearing, and the second reduction gear set is rotatably connected to the inside of the outer casing through the first bearing.

[0014] As a further description of the above technical solution: a suspension bracket is provided at the outer end of the outer shell.

[0015] Beneficial effects: By integrating two sets of reduction gears and sharing the same oil chamber and lubrication system, the consumption of housing material is reduced, the overall volume is reduced, and the space utilization rate is improved. Moreover, by separating the No. 1 and No. 2 reduction gear sets inside the oil chamber with baffles, the lubricating oil eddies and dead zones generated when the two sets of gears rotate in opposite directions are effectively avoided.

[0016] In addition, the curved guide plate directs some of the lubricating oil carried by the gear rotation to the meshing area above the reduction gear, thus optimizing the lubrication effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a dual-motor reduction gearbox for a forklift electric drive assembly proposed in this utility model;

[0018] Figure 2 This is a partial structural cross-sectional view of a dual-motor reduction gearbox for a forklift electric drive assembly according to the present invention.

[0019] Figure 3 This is a partial three-dimensional structural diagram of a dual-motor reduction gearbox for a forklift electric drive assembly according to this utility model.

[0020] Legend:

[0021] 1. Outer shell; 2. Flange; 3. Bridge housing; 5. Bearing No. 1; 6. Internal spline; 7. Reduction gear set No. 1; 8. Reduction gear set No. 2; 9. Transmission gear; 10. Output gear; 12. Deflector; 14. Guide vane No. 1; 15. Guide vane No. 2; 16. Connecting block; 17. Magnet; 18. Shaft; 19. Suspension bracket; 20. Oil chamber; 21. Bushing; 22. Bearing No. 2. Detailed Implementation

[0022] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-3 A dual-motor gearbox for a forklift electric drive assembly includes a housing 1. An oil chamber 20 is provided inside the housing 1, allowing lubricating oil to be added to lubricate both a first reduction gear set 7 and a second reduction gear set 8. The meshing gears of the first and second reduction gear sets 7 and 8 are preferably helical gears for good meshing performance. The housing 1 has an oil inlet and an oil outlet for adding and discharging lubricating oil. The oil chamber 20 contains the first and second reduction gear sets 7 and 8 respectively. The first reduction gear set 7 is connected to the output of a servo motor used to drive the forklift. The second reduction gear set 8 is connected to the output end of the servo motor used to drive the hydraulic pump. A bushing 21 is provided on the second reduction gear set 8, and an internal spline 6 is provided on the inner side of the bushing 21. It is connected to the hydraulic pump via a spline. Both the first reduction gear set 7 and the second reduction gear set 8 are used to reduce the output speed of the servo motor. A baffle 12 is provided between the first reduction gear set 7 and the second reduction gear set 8 to separate them, preventing insufficient lubrication caused by eddies or dead zones in the oil chamber 20 when the first and second reduction gear sets 7 and 8 operate in opposite directions.

[0024] Furthermore, a second guide plate 15 with an arc-shaped profile is provided on the side of the anti-surge plate 12 near the first reduction gear set 7. It is located above the first reduction gear set 7 and can guide some of the lubricating oil carried up by the first reduction gear set 7 when it rotates rapidly back to the area of ​​the first reduction gear set 7 along the arc surface of the second guide plate 15. It can guide the lubricating oil to the meshing part above the first reduction gear set 7 by its own rotation, even when the lubricating oil only submerges half of the first reduction gear set 7, thereby improving the lubrication effect.

[0025] Furthermore, a first guide plate 14 with an arc-shaped profile is also provided on one side wall of the anti-surge plate 12 near the second reduction gear set 8, and the first guide plate 14 is positioned above the second reduction gear set 8. The first guide plate 14 and the second guide plate 15 have the same function: by utilizing the rotation of the first reduction gear set 7 itself, the splashed lubricating oil is directed to the meshing part, thereby improving the lubrication effect.

[0026] Furthermore, a magnet 17 is respectively provided below the first guide plate 14 and the second guide plate 15, and the two ends of the magnet 17 are connected to the rotating shaft 18. The rotating shaft 18 is connected to the anti-surge plate 12 through the connecting block 16. In the middle of guiding the lubricating oil to the meshing area of ​​the first reduction gear set 7 and the second reduction gear set 8, the magnet 17 is used to attract iron filings mixed in the lubricating oil, so as to prevent them from falling onto the first reduction gear set 7 and the second reduction gear set 8 and causing damage to them.

[0027] Furthermore, the anti-surge plate 12 and the outer shell 1 are arranged in a semi-enclosed manner, which allows lubricating oil to flow in the area between both sides of the anti-surge plate 12, while simultaneously lubricating the first reduction gear set 7 and the second reduction gear set 8.

[0028] Furthermore, the outer casing 1 is connected to the bridge housing 3 via the flange 2, and the inner side of the bridge housing 3 is provided with an output end gear 10. The output end gear 10 is connected to the first reduction gear set 7 via the transmission gear 9. It should be noted that the output end gear 10 is also provided with a bushing 21, and the inner side of the bushing 21 is provided with internal spline teeth 6, which are connected to the conveyor shaft to realize power transmission.

[0029] Furthermore, the first reduction gear set 7 is rotatably connected to the inside of the outer casing 1 via the second bearing 22, and the second reduction gear set 8 is rotatably connected to the inside of the outer casing 1 via the first bearing 5. The arrangement of the first bearing 5 and the second bearing 22 can reduce the transmission resistance of the first reduction gear set 7 and the second reduction gear set 8, thereby reducing energy consumption.

[0030] Furthermore, a suspension bracket 19 is provided at the outer end of the outer shell 1, which is fixed to the frame of the forklift by bolts to secure it in place.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A double-motor reduction gearbox for an electric drive assembly of a forklift truck, comprising a housing (1), characterized in that, The outer shell (1) is provided with an oil chamber (20) for adding lubricating oil into the oil chamber (20) to lubricate the first reduction gear set (7) and the second reduction gear set (8). The oil chamber (20) is provided with the first reduction gear set (7) and the second reduction gear set (8) respectively. A baffle plate (12) is provided between the first reduction gear set (7) and the second reduction gear set (8) to separate the first reduction gear set (7) and the second reduction gear set (8).

2. The dual-motor reduction gearbox for a forklift electric drive assembly according to claim 1, characterized in that, The wave deflector (12) is provided with a second guide plate (15) with an arc shape on the side near the first reduction gear set (7), which is located above the first reduction gear set (7).

3. The double-motor reduction gearbox of an electric drive assembly of a forklift according to claim 2, characterized in that, On the side wall of the wave deflector (12) near the second reduction gear set (8), there is also a first guide plate (14) with an arc shape, and the first guide plate (14) is located above the second reduction gear set (8).

4. A dual-motor reduction gearbox for a forklift electric drive assembly according to claim 3, characterized in that, A magnet (17) is provided below the first guide plate (14) and the second guide plate (15), and the two ends of the magnet (17) are connected to the rotating shaft (18). The rotating shaft (18) is connected to the wave deflector (12) through the connecting block (16).

5. A dual-motor reduction gearbox for a forklift electric drive assembly according to claim 1, characterized in that, The wave deflector (12) and the outer shell (1) are arranged in a semi-enclosed manner.

6. A dual-motor reduction gearbox for a forklift electric drive assembly according to claim 1, characterized in that, The outer shell (1) is connected to the bridge shell (3) via the flange (2), and the inner side of the bridge shell (3) is provided with an output end gear (10), and the output end gear (10) is connected to the first reduction gear set (7) via the transmission gear (9).

7. The double-motor reduction gearbox of an electric drive assembly of a forklift according to claim 1, characterized in that, The first reduction gear set (7) is rotatably connected to the inside of the outer shell (1) via the second bearing (22), and the second reduction gear set (8) is rotatably connected to the inside of the outer shell (1) via the first bearing (5).

8. A dual-motor reduction gearbox for a forklift electric drive assembly according to claim 1, characterized in that, The outer end of the outer shell (1) is provided with a suspension bracket (19).

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