CN-224214263-U - Three-stage transmission electronic throttle valve of diesel engine

CN224214263UCN 224214263 UCN224214263 UCN 224214263UCN-224214263-U

Abstract

The three-stage transmission electronic throttle valve of the diesel engine comprises a valve shell, a valve shaft assembly, a driving assembly and an intermediate transmission mechanism, wherein the valve shaft assembly comprises a valve shaft and a sector gear, the sector gear is connected with the top end of the valve shaft, the driving assembly comprises a motor and a driving gear, the driving gear is connected with the output end of the motor, the driving gear is in transmission connection with the sector gear through the intermediate transmission mechanism, the intermediate transmission mechanism comprises a first intermediate gear and a second intermediate gear, the first intermediate gear and the second intermediate gear are duplex gears, the first intermediate gear comprises a first input large gear and a first output small gear, the second intermediate gear comprises a second input large gear and a second output small gear, the first input large gear is in meshed connection with the driving gear, the first output small gear is in meshed connection with the second input large gear, and the second output small gear is in meshed connection with the sector gear. The utility model has large torque transmission ratio, high precision and stability, and the valve plate is not easy to shake under large pressure difference.

Inventors

HU QINWEI
ZHANG SHILAI
SUN SHENGMING
HAO JIANHUA
XU XIN
WU JIAN

Assignees

浙江科博达工业有限公司

Dates

Publication Date: 20260508
Application Date: 20250516

Claims (8)

1. The three-stage transmission electronic throttle valve of the diesel engine comprises a valve shell, a valve shaft assembly, a driving assembly and an intermediate transmission mechanism, wherein the valve shaft assembly comprises a valve shaft and a sector gear assembly, the sector gear assembly comprises a sector gear, the sector gear is connected with the top end of the valve shaft, the driving assembly comprises a motor and a driving gear, the driving gear is connected with the output end of the motor, and the driving gear is in transmission connection with the sector gear through the intermediate transmission mechanism; The number of teeth of the driving gear is smaller than that of the first input big gear, the number of teeth of the first output small gear is smaller than that of the second input big gear, and the number of teeth of the second output small gear is smaller than that of the sector gear.
2. The three-stage transmission electronic throttle valve of a diesel engine according to claim 1, wherein the valve housing comprises a valve body and a cover plate, the valve body is provided with a mounting cavity, the cover plate covers the opening of the mounting cavity and is connected with the valve body, and the driving assembly, the intermediate transmission mechanism and the sector gear assembly are respectively arranged in the mounting cavity.
3. The three-stage transmission electronic throttle valve of a diesel engine according to claim 2, wherein the outer wall of the installation cavity of the valve body is integrally provided with an outwardly protruding reinforcing rib.
4. The three-stage transmission electronic throttle of a diesel engine of claim 1, wherein the drive gear has a ratio of 5.3 to the first input gear, the first output pinion has a ratio of 2.3 to the second input gear, and the second output pinion has a ratio of 5.7 to the sector gear.
5. The three-stage transmission electronic throttle of a diesel engine according to claim 4, wherein the driving gear is a 10-tooth gear, the first input large gear is a 53-tooth gear, the first output small gear is a 10-tooth gear, the second input large gear is a 23-tooth gear, the second output small gear is a 10-tooth gear, and the sector gear is a 57-tooth gear.
6. The three-stage transmission electronic throttle valve of the diesel engine according to claim 1, wherein the sector gear assembly comprises a return torsion spring, the sector gear comprises a sector gear body and an annular guide post, the sector gear body is provided with a through hole for the valve shaft to penetrate, and one end of the annular guide post is connected with one surface of the sector gear body facing the valve shaft and surrounds the through hole; the valve shaft penetrates through the annular guide post, the top end of the valve shaft stretches into the through hole of the sector gear body and is connected with the sector gear body, and the return torsion spring is sleeved outside the annular guide post.
7. The three-stage transmission electronic throttle valve of a diesel engine according to claim 6, wherein a torsion spring pushing part is arranged on the side surface of the annular guide post, and the torsion spring pushing part is provided with a first pushing part side elevation and a second pushing part side elevation which are opposite to each other; When the sector gear component is not installed in the valve shell, the first blocking leg and the second blocking leg of the return torsion spring sleeved outside the annular guide post respectively lean against the side elevation of the first pushing blocking part and the side elevation of the second pushing blocking part, so that the return torsion spring has pretightening torque.
8. The three-stage transmission electronic throttle valve of a diesel engine according to claim 7, wherein the valve housing comprises a valve body, the valve body is provided with a mounting cavity, the bottom surface of the mounting cavity is provided with an upward protruding return upright post, and two opposite sides of the return upright post are respectively provided with a first return upright post side elevation and a second return upright post side elevation; When the sector gear rotates to deviate from a preset initial position, the first blocking leg is clamped on the first return upright post side elevation, and the torsion spring pushing blocking part pushes the second blocking leg to deviate from the second return upright post side elevation so as to twist the return torsion spring.

Description

Three-stage transmission electronic throttle valve of diesel engine Technical Field The utility model relates to an electronic throttle valve of an air inlet system of an automobile engine. Background The electronic throttle valve is a core execution component of an air inlet system in a modern diesel engine management system, is connected with an air filter at the upper part and an engine cylinder at the lower part, and is mainly responsible for controlling the air-fuel ratio of an engine, adjusting the pressure difference of air inlet and exhaust, optimizing the exhaust temperature, effectively activating a catalyst of an aftertreatment system and reducing the emission of tail gas pollutants. At present, the working principle of the electronic throttle valve of the diesel engine is that an Electronic Control Unit (ECU) controls a direct current motor by Pulse Width Modulation (PWM) signals according to the current running state and the exhaust emission condition, a transmission gear is driven to twist by the direct current motor, and then a valve plate is driven by the transmission gear to rotate within a certain angle range, so that the opening angle of the throttle valve is regulated, and the size of the air inflow is controlled, so that the engine is ensured to be in an optimal working state. In the existing electronic throttle valve technology of the diesel engine, secondary gear transmission is commonly adopted, and diesel engine vehicles often face a use scene of heavy load or high torque output, at the moment, the air inflow and the air inflow pressure required by the engine are increased, so that the pressure difference at two sides of a valve plate is increased, the secondary gear transmission can provide rapid transmission response, but the transmission ratio is limited, the torque transmission capability is limited, when the throttle valve is under the pressure difference of heavy air flow, unstable phenomenon is easily generated, the valve plate is often caused to shake, vibration and noise are generated, the control precision of equipment is further influenced, and the service life is reduced. Disclosure of Invention The utility model aims to solve the technical problem of providing an electronic throttle valve with large torque transmission ratio, high precision and stability and difficult shaking of a valve plate under large pressure difference. The utility model aims to solve the technical problem of providing the electronic throttle valve with large mechanical strength of the installation cavity of the valve body. Yet another object of the present utility model is to provide an electronic throttle valve that is simple and reliable in installation of a sector gear assembly. The embodiment of the utility model provides a three-stage transmission electronic throttle valve of a diesel engine, which comprises a valve shell, a valve shaft assembly, a driving assembly and an intermediate transmission mechanism, wherein the valve shaft assembly comprises a valve shaft and a sector gear assembly, the sector gear assembly comprises a sector gear, the sector gear is connected with the top end of the valve shaft, the driving assembly comprises a motor and a driving gear, the driving gear is connected with the output end of the motor, the driving gear is in transmission connection with the sector gear through the intermediate transmission mechanism, the intermediate transmission mechanism comprises a first intermediate gear and a second intermediate gear, the first intermediate gear and the second intermediate gear are duplex gears, the first intermediate gear comprises a first input big gear and a first output small gear, the second intermediate gear comprises a second input big gear and a second output small gear, the first input big gear is in meshed connection with the driving gear, the second output small gear is in meshed connection with the sector gear, the number of teeth of the driving gear is smaller than that of the first input big gear, the number of teeth of the first output small gear is smaller than that of the second input big gear, and the number of teeth of the second output small gear is smaller than that of the sector gear. Preferably, the valve housing comprises a valve body and a cover plate, wherein the valve body is provided with a mounting accommodating cavity, the cover plate is covered at the opening part of the mounting accommodating cavity and is connected with the valve body, and the driving assembly, the intermediate transmission mechanism and the sector gear assembly are respectively arranged in the mounting accommodating cavity. Preferably, the outer wall of the mounting cavity of the valve body is integrally provided with an outwardly convex reinforcing rib. Preferably, the sector gear assembly comprises a return torsion spring, the sector gear comprises a sector gear body and an annular guide post, the sector gear body is provided with a through hole for a valve shaf