CN216105879U

CN216105879U - Single motor driven forklift power system

Info

Publication number: CN216105879U
Application number: CN202121947417.0U
Authority: CN
Inventors: 唐师法
Original assignee: Wuxi Mingheng Hybrid Power Technology Co ltd
Current assignee: Wuxi Mingheng Hybrid Power Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-03-22
Anticipated expiration: 2031-08-18

Abstract

The utility model relates to the technical field of vehicle driving systems, in particular to a forklift power system driven by a single motor, which comprises a driving motor, wherein one end of the driving motor is connected with a speed reducer mechanism and is used for providing power for the walking of a forklift; the other end of the driving motor is connected with a rotating direction retaining mechanism, and an oil pump is connected to the rotating direction retaining mechanism and used for providing power for a lifting hydraulic system of the forklift. Compared with the prior art, the system can save one set of motor and controller, avoid long-time low-load operation of the lifting motor, and is favorable for saving resources and reducing energy consumption.

Description

Single motor driven forklift power system

Technical Field

The utility model relates to the technical field of vehicle driving systems, in particular to a forklift power system driven by a single motor.

Background

In recent years, environmental protection issues are more and more emphasized at home and abroad, and if the goals of carbon peak reaching and carbon neutralization are realized, a comprehensive energy system needs to be constructed, and the construction path and the development mode of the traditional energy system are changed. In the field of forklifts, as a pure electric forklift has the advantages of less pollution, low noise and the like, the development trend is rapid in recent years, and the pure electric forklift gradually replaces an internal combustion engine forklift. The power system of the pure electric forklift mainly adopts a walking motor and a lifting motor to respectively realize the walking function and the lifting function of the forklift, the power difference of the two motors is small, and the lifting motor needs to supply oil to a steering system of the forklift through a hydraulic oil pump, so that the lifting motor needs to be operated under low load for a long time in the running process of the forklift, and the resource waste is caused. The traditional internal combustion engine forklift is driven by a single power source, the internal combustion engine rotates in only one direction, and the rotation direction needs to be changed and driven through a mechanical structure during reversing. In addition, although the motor can realize rotation in two directions, compared with a gear shifting mechanism driven by an internal combustion engine, the gear shifting mechanism can save forward gears and reverse gears, but the hydraulic oil pump cannot suck oil to generate oil pressure when reversely rotating.

Therefore, a new technology to solve the above problems is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provides a forklift power system driven by a single motor, wherein a driving motor is adopted to drive a speed reducer mechanism to realize the walking of a forklift, and a driving motor is adopted to drive a rotating direction retaining mechanism to realize the lifting function of the forklift.

The above purpose is realized by the following technical scheme:

a forklift power system driven by a single motor comprises a driving motor, wherein one end of the driving motor is connected with a speed reducer mechanism and is used for providing power for the walking of a forklift; the other end of the driving motor is connected with a rotating direction retaining mechanism, and an oil pump is connected to the rotating direction retaining mechanism and used for providing power for a lifting hydraulic system of the forklift.

Furthermore, the speed reducer mechanism comprises a clutch, a gear pair and a differential mechanism which are connected with each other, and the power of the driving motor is transmitted to the forklift after passing through the clutch, the gear pair and the differential mechanism so as to provide the power for the forklift to walk; the clutch is connected with the driving motor, and the interruption and combination of the speed reducer mechanism and the driving motor can be realized.

Further, the clutch may be any one of a dog clutch, a dry friction plate clutch, or a wet clutch.

Further, the rotation direction maintaining mechanism comprises an input shaft connected with the driving motor, a group of first one-way clutches and second one-way clutches which are symmetrical to each other are connected to the input shaft, a first bevel gear is connected to the first one-way clutch, a second bevel gear is connected to the second one-way clutch, and the first bevel gear and the second bevel gear can be meshed with an output shaft simultaneously to drive the oil pump.

Further, a first rotational direction of the first one-way clutch may transmit torque and a second rotational direction may not transmit torque; the second one-way clutch is non-torque transferable in a first rotational direction and torque transferable in a second rotational direction.

Further, when the input shaft drives the first one-way clutch and the second one-way clutch to rotate in a first rotation direction, the first one-way clutch may transmit torque to the first bevel gear and drive the output shaft to rotate; when the input shaft drives the first one-way clutch and the second one-way clutch to rotate in a second rotational direction, the second one-way clutch may transmit torque to the second bevel gear and drive the output shaft to rotate.

Further, a bevel gear structure which can be matched with the first bevel gear and the second bevel gear is arranged on the output shaft, and gear meshing can be formed.

Advantageous effects

According to the forklift power system driven by the single motor, the driving motor is adopted to drive the speed reducer mechanism to realize the walking of the forklift, the driving motor is adopted to drive the rotation direction retaining mechanism to realize the lifting function of the forklift, and the lifting function of the forklift is not interfered by the rotation direction of the driving motor.

Drawings

FIG. 1 is a schematic structural diagram of a power system of a single motor driven forklift truck according to the present invention;

fig. 2 is a schematic structural diagram of a rotation direction retaining mechanism in a power system of a forklift driven by a single motor.

Graphic notation:

1-driving motor, 2-reducer mechanism, 21-clutch, 22-gear pair, 23-differential, 3-rotation direction holding mechanism, 31-input shaft, 32-first one-way clutch, 33-output shaft, 34-second one-way clutch, 35-second bevel gear, 36-first bevel gear and 4-oil pump.

Detailed Description

The utility model is explained in more detail below with reference to the figures and examples. The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a power system of a forklift driven by a single motor comprises a driving motor 1, wherein one end of the driving motor 1 is connected with a speed reducer mechanism 2 and is used for providing power for the walking of the forklift; the other end of the driving motor 1 is connected with a rotating direction retaining mechanism 3, and an oil pump 4 is connected to the rotating direction retaining mechanism 3 and used for providing power for a lifting hydraulic system of the forklift.

Specifically, the system can not only realize the walking and lifting of the forklift through one driving motor 1, but also always ensure the unchanged rotating direction of the rotating direction keeping mechanism 3 no matter the driving motor 1 is clockwise or anticlockwise when controlling the lifting of the lifting hydraulic system.

As shown in fig. 1, as an optimization of the speed reducer mechanism 2 in this embodiment, the speed reducer mechanism 2 includes a clutch 21, a gear pair 22 and a differential 23 that are connected to each other, and the power of the driving motor 1 is transmitted to the forklift after passing through the clutch 21, the gear pair 22 and the differential 23, so as to provide the power for the forklift to walk;

the clutch 21 is used for being connected with the driving motor 1, so that the speed reducer mechanism 2 and the driving motor 1 can be interrupted and combined, and the running and the stopping of the forklift can be controlled.

In the present embodiment, the clutch 21 may be any one of a dog clutch, a dry friction plate clutch, and a wet clutch.

As shown in fig. 2, as an optimization of the rotation direction maintaining mechanism 3 in the present embodiment, the rotation direction maintaining mechanism 3 includes an input shaft 31 connected to the driving motor 1, a set of first one-way clutch 32 and a set of second one-way clutch 34 are connected to the input shaft 31, the first one-way clutch 32 is connected to a first bevel gear 36, the second one-way clutch 34 is connected to a second bevel gear 35, and the first bevel gear 36 and the second bevel gear 35 can be engaged with an output shaft 33 at the same time, so as to drive the oil pump 4.

Specifically, the output shaft 33 is provided with a bevel gear structure which can be matched with the first bevel gear 36 and the second bevel gear 35, so that gear engagement can be formed, and further, the output shaft 33 can be driven to rotate.

In this embodiment, the output shaft 33 always rotates in the same direction regardless of whether the first bevel gear 36 drives the output shaft 33 or the second bevel gear 35 drives the output shaft 33. The principle of this function implementation is as follows:

as shown in fig. 2, the first one-way clutch 32 is torque transferable in a first rotational direction and torque non-transferable in a second rotational direction; the second one-way clutch 34 is torque-non-transferable in a first rotational direction and torque-transferable in a second rotational direction.

When the input shaft 31 drives the first one-way clutch 32 and the second one-way clutch 34 to rotate in a first rotation direction, the first one-way clutch 32 can transmit torque to the first bevel gear 36, the first bevel gear 36 is meshed with a bevel gear on the output shaft 33, and then the output shaft 33 is driven to rotate, at this time, the second one-way clutch 34 is idle;

when the input shaft 31 drives the first one-way clutch 32 and the second one-way clutch 34 to rotate in the second rotation direction, the second one-way clutch 34 may transmit torque to the second bevel gear 35, and the second bevel gear 35 is engaged with the bevel gear on the output shaft 33, so as to drive the output shaft 33 to rotate, at this time, the first one-way clutch 32 idles.

In the present embodiment, in both of the above states, the output shaft 33 rotates in the first rotational direction.

The above description is for the purpose of illustrating embodiments of the utility model and is not intended to limit the utility model, and it will be understood by those skilled in the art that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A forklift power system driven by a single motor is characterized by comprising a driving motor, wherein one end of the driving motor is connected with a speed reducer mechanism and used for providing power for the walking of a forklift; the other end of the driving motor is connected with a rotating direction retaining mechanism, and an oil pump is connected to the rotating direction retaining mechanism and used for providing power for a lifting hydraulic system of the forklift.

2. The power system of the single-motor-driven forklift truck according to claim 1, wherein the speed reducer mechanism comprises a clutch, a gear pair and a differential which are connected with each other, and the power of the driving motor is transmitted to the forklift truck after passing through the clutch, the gear pair and the differential to provide the power for the forklift truck to walk; the clutch is connected with the driving motor, and the interruption and combination of the speed reducer mechanism and the driving motor can be realized.

3. The power system of a single motor driven forklift truck according to claim 2, wherein said clutch is any one of a dog clutch, a dry friction plate clutch or a wet clutch.

4. The power system of a single-motor-driven forklift truck according to claim 1, wherein the rotation direction maintaining mechanism includes an input shaft connected to the driving motor, the input shaft is connected to a set of first one-way clutch and a set of second one-way clutch which are symmetrical to each other, the first one-way clutch is connected to a first bevel gear, the second one-way clutch is connected to a second bevel gear, and the first bevel gear and the second bevel gear can be engaged with an output shaft at the same time to drive the oil pump.

5. The single motor driven forklift powertrain of claim 4, wherein said first one-way clutch is torque transmissible in a first rotational direction and torque is not transmissible in a second rotational direction; the second one-way clutch is non-torque transferable in a first rotational direction and torque transferable in a second rotational direction.

6. The single motor driven forklift powertrain of claim 4, wherein said first one-way clutch is adapted to transmit torque to said first bevel gear and to rotate said output shaft when said input shaft drives said first one-way clutch and said second one-way clutch to rotate in a first rotational direction; when the input shaft drives the first one-way clutch and the second one-way clutch to rotate in a second rotational direction, the second one-way clutch may transmit torque to the second bevel gear and drive the output shaft to rotate.

7. The power system of a single motor driven forklift truck according to claim 4, wherein said output shaft is provided with a bevel gear structure which can be matched with said first bevel gear and said second bevel gear to form a gear mesh.