CN-224201108-U - Power takeoff of electric actuating mechanism

Abstract

The utility model discloses a power takeoff of an electric actuating mechanism, which relates to the technical field of transmission power takeoff, and comprises an input shaft, an input gear, a driving unit, a transmission unit and a self-locking unit, wherein the input gear and the input shaft are coaxially arranged, the transmission unit comprises a rocker arm, the first end of the rocker arm is connected with the output end of the driving unit, the second end of the rocker arm is connected with a shifting fork, the shifting fork is also connected with a sliding sleeve, the sliding sleeve is respectively connected with the input shaft and the input gear, the input gear is meshed with an output gear shaft, and the shifting fork is connected with the self-locking unit. The power takeoff of the electric actuating mechanism eliminates pneumatic elements such as an air cylinder, an air valve and the like in the traditional pneumatic actuating mechanism, replaces pneumatic driving by a transmission unit consisting of a rocker arm, a shifting fork and a sliding sleeve, directly transmits power through a mechanical structure, has no risk of leakage of compressed air, and remarkably reduces the requirements on sealing materials and processes.

Inventors

• ZHANG CHEN
• FENG WEIGANG
• GAO TAO
• YANG SHUANGHU
• LI BOWEN
• MA BAOYU
• HU MINGHE
• ZHOU SIQUAN

Assignees

• 陕西法士特汽车传动集团有限责任公司

Dates

Publication Date

20260505

Application Date

20250529

Claims (10)

1. 1. An electric actuator power take-off comprising: An input shaft (2), an input gear (3), a driving unit, a transmission unit and a self-locking unit; the input gear (3) and the input shaft (2) are coaxially arranged; The transmission unit comprises a rocker arm (6), a first end of the rocker arm (6) is connected with the output end of the driving unit, a second end of the rocker arm is connected with a shifting fork (9), the shifting fork (9) is further connected with a sliding sleeve (1), the sliding sleeve (1) is respectively connected with an input shaft (2) and an input gear (3), the input gear (3) is meshed with an output gear shaft (4), and the shifting fork (9) is connected with the self-locking unit.
2. 2. An electric actuator power take-off according to claim 1, characterized in that the drive unit comprises a ball screw (5) and a motor (13), the output of the motor (13) being connected to the ball screw (5), the ball screw (5) being adapted to convert rotational movement into linear movement.
3. 3. An electric actuator power take-off according to claim 1, characterized in that the fork (9) comprises a fork groove (9 a) and a fork leg (9 b), the second end of the rocker arm (6) being inserted into the fork groove (9 a), the fork leg (9 b) being connected to the sliding sleeve (1).
4. 4. A power take-off for an electric actuator according to claim 3, characterized in that the sliding sleeve (1) is provided with a sliding sleeve groove (1 a) into which a fork leg (9 b) can be inserted.
5. 5. An electric actuator power takeoff according to claim 3, characterized in that the self-locking unit comprises a shifting fork shaft (7), a steel ball (10), a spring (11) and a self-locking screw plug (12), wherein the shifting fork shaft (7) is connected with a shifting fork (9), a shifting fork shaft groove (7 a) is arranged on the shifting fork shaft (7), the steel ball (10) can be embedded into the shifting fork shaft groove (7 a), the outer side of the steel ball (10) abuts against the first end of the spring (11) and is pressed by the pretightening force of the spring (11), the second end of the spring (11) abuts against the self-locking screw plug (12), and the self-locking screw plug (12) is screwed into a shell threaded hole of the power takeoff mechanical body.
6. 6. An electric actuator power take-off according to claim 1, further comprising a detection unit comprising a displacement sensor (14), the displacement sensor (14) being arranged on the drive unit housing, detecting the amount of displacement of the rocker arm (6).
7. 7. An electric actuator power take-off according to claim 2, characterized in that the output of the motor (13) is connected to the ball screw (5) by means of splines.
8. 8. An electric actuator power take-off according to claim 5, characterized in that the shift rail (7) is connected to the shift fork (9) by means of a set screw (8).
9. 9. An electric actuator power take-off as claimed in claim 1, characterized in that the input gear (3) and the input shaft (2) are provided with external splines, the sliding sleeve (1) is internally provided with internal splines, and the sliding sleeve (1) is arranged outside the input gear (3) through a spline connecting sleeve and can move along the axial direction of the input gear (3) when a gear is engaged.
10. 10. An electric actuator power take-off as claimed in claim 2, characterized in that the ball screw (5) is provided with a protective sleeve, one end of which is fixed to the drive unit housing and the other end of which is retractable with the linear movement of the ball screw (5).

Description

Power takeoff of electric actuating mechanism Technical Field The utility model relates to the technical field of transmission power takeoff devices, in particular to an electric actuator power takeoff device. Background The power takeoff is used as a key mechanical device for connecting the transmission with external equipment, is widely applied to commercial vehicles such as dumpers, garbage collection vehicles and the like, and can drive equipment such as a hydraulic pump, an air compressor and the like to work by outputting power of the transmission as required so as to realize functions such as lifting, loading and unloading of the vehicles. In actual work, the power takeoff needs to flexibly switch neutral gear and working gear through the actuating mechanism according to the operation scene and working condition, so as to accurately control the start, stop and magnitude of power output. At present, the power takeoff actuating mechanism in the market mostly adopts a pneumatic structure, and the pneumatic structure depends on a whole vehicle air source system, and the piston is pushed by compressed air to drive a piston fork shaft to reciprocate, so that the gear-shifting operation is completed. However, the traditional pneumatic actuating mechanism has the obvious defects that firstly, the pneumatic actuating mechanism is difficult to accurately control due to air pressure fluctuation, so that gear abrasion is increased, strong gear shifting impact is generated, the service life and operation comfort of equipment are affected, secondly, the pneumatic actuating mechanism has extremely high requirements on sealing performance, sealing elements of components such as an air cylinder and an air valve are easy to age and leak, faults occur frequently, and the maintenance cost is high, thirdly, along with the accelerated transformation of a commercial vehicle to the new energy field, the 'complete vehicle gasification' becomes an important development trend, and the pneumatic actuating mechanism is highly dependent on an air source system, so that the pneumatic actuating mechanism cannot be matched with a pure electric and hybrid vehicle architecture without an air source or insufficient air source, and the integrated optimization and the lightweight design of a commercial vehicle power system are severely restricted. Disclosure of utility model The utility model aims to provide an electric actuator power takeoff to overcome the defects of low control precision, high sealing requirement and dependence on an air source system in the prior art. In order to achieve the above purpose, the following technical scheme is adopted herein: an electric actuator power take-off comprising: the device comprises an input shaft, an input gear, a driving unit, a transmission unit and a self-locking unit; The input gear and the input shaft are coaxially arranged; The transmission unit comprises a rocker arm, a first end of the rocker arm is connected with the output end of the driving unit, a second end of the rocker arm is connected with a shifting fork, the shifting fork is further connected with a sliding sleeve, the sliding sleeve is respectively connected with an input shaft and an input gear, the input gear is meshed with an output gear shaft, and the shifting fork is connected with the self-locking unit. Further, the driving unit comprises a ball screw and a motor, wherein the output end of the motor is connected with the ball screw, and the ball screw can convert rotary motion into linear motion. Further, the shifting fork comprises a shifting fork groove and a shifting fork foot, the second end of the rocker arm is inserted into the shifting fork groove, and the shifting fork foot is connected with the sliding sleeve. Further, the sliding sleeve is provided with a sliding sleeve groove for the fork foot of the shifting fork to be inserted. Further, the self-locking unit comprises a shifting fork shaft, a steel ball, a spring and a self-locking plug screw, wherein the shifting fork shaft is connected with a shifting fork, a shifting fork shaft groove is formed in the shifting fork shaft, the steel ball can be embedded into the shifting fork shaft groove, the outer side of the steel ball abuts against the first end of the spring and is extruded by the pretightening force of the spring, the second end of the spring abuts against the self-locking plug screw, and the self-locking plug screw is screwed into a shell threaded hole of the mechanical body of the power takeoff. Further, the device also comprises a detection unit, wherein the detection unit comprises a displacement sensor, and the displacement sensor is arranged on the driving unit shell and used for detecting the displacement of the rocker arm. Further, the output end of the motor is connected with the ball screw through a spline. Further, the shifting fork shaft is connected with the shifting fork through a set screw. Furthermore, the input gear and the input