CN114893307A - Electronic throttle valve body of brushless direct current motor - Google Patents

Abstract

The invention relates to the field of automobile air throttles, in particular to an electronic air throttle body of a brushless direct current motor. The driven mechanism is positioned in the valve body; the transmission mechanism is positioned outside the valve body and comprises a first transmission device directly connected to the driven mechanism and a second transmission device directly connected to the power mechanism. The first transmission device and the second transmission device are not rigidly connected; when the power mechanism outputs power, the power mechanism drives the second transmission device to drive the first transmission device to enable the driven mechanism to act. When the power mechanism does not output, the first transmission device drives the driven mechanism to return to the initial position. The electronic throttle valve body of the brushless direct current motor adopts the mechanically separated transmission mechanism, and can realize that one brushless motor is suitable for various valve bodies, thereby reducing the cost and improving the benefit.

Description

A brushless DC motor electronic throttle body

technical field

The invention relates to the field of automobile throttles, in particular to an electronic throttle body of a brushless DC motor.

Background technique

Electronic throttle body is an important part of automobile engine. Electronic throttle valve technology helps to improve the stability and economy of automobile driving, and can effectively reduce emission and pollution. In the prior art, the electronic throttle body is usually coaxial with the shaft of the brushless motor and the shaft of the throttle valve, so that the applicability of one brushless motor to different valve bodies is limited.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an electronic throttle body of a brushless DC motor to solve the problems existing in the prior art.

The invention provides a brushless DC motor electronic throttle body, which is characterized in that it includes a valve body, a driven mechanism, a transmission mechanism and a power mechanism; the driven mechanism is located in the valve body; the transmission mechanism is located in the The valve body includes a first transmission device directly connected to the driven mechanism and a second transmission device directly connected to the power mechanism; there is no rigid connection between the first transmission device and the second transmission device ; When the power mechanism outputs power, the power mechanism drives the second transmission device to drive the first transmission device to make the driven mechanism act; when the power mechanism does not output power, the first transmission device The transmission device drives the driven mechanism to return to the initial position.

Further, the driven mechanism includes a throttle plate and a throttle shaft; the throttle plate is fixed on the throttle shaft by a throttle plate screw, and rotates with the throttle shaft.

Further, the driven mechanism also includes a needle roller bearing and a stuffing cover; the needle roller bearing is provided at the connection between the throttle shaft and the valve body; and the throttle shaft is far from the transmission mechanism. The stuffing cover is provided outside the needle bearing at one end.

Further, the first transmission device includes a spring seat, a return spring and a driven swivel; the driven swivel is fixed on the driven mechanism; the return spring is sleeved on the spring seat, used for The driven mechanism is driven to return to the initial position; the second transmission device is an active rotating frame, and the active rotating frame is fixed on the power mechanism for driving the driven rotating frame to rotate.

Further, an opening is arranged on the active revolving frame, and a supporting foot matching the opening is arranged on the driven revolving frame; the supporting foot extends into the opening; when the active revolving frame rotates, the One side of the opening is in close contact with the supporting foot, which drives the driven rotating frame to rotate.

Further, a first torsion arm and a second torsion arm are respectively provided at both ends of the return spring; the first torsion arm is fitted with the valve body limit block, and the second torsion arm is connected to the slave Rotary frame fit.

Further, the power mechanism is a brushless motor; the brushless motor is fixed on the valve body by the screw; the second transmission device is rigidly connected to the output shaft of the brushless motor.

Further, the power mechanism further includes an end cover and a buckle; the end cover is fixed on the brushless motor through the buckle.

Further, a sealing ring is provided between the brushless motor and the valve body.

Further, a limit block is provided between the driven mechanism and the transmission mechanism.

The electronic throttle body of the brushless DC motor of the present invention adopts a mechanically separated transmission mechanism. Compared with the prior art, one brushless motor can be applied to various valve bodies, thereby reducing the cost and improving the benefit.

Description of drawings

1 is a schematic structural diagram of a preferred embodiment of a brushless DC motor electronic throttle body of the present invention;

FIG. 2 is an assembly schematic diagram of a preferred embodiment of the brushless DC motor electronic throttle body of the present invention;

FIG. 3 is another assembly schematic diagram of a preferred embodiment of the brushless DC motor electronic throttle body of the present invention.

Among them, 1- throttle plate screw, 2- throttle plate, 3- return spring, 4- driven rotary frame, 5- sealing ring, 6- snap, 7- end cover, 8- screw, 9- brushless Motor, 10-brushless motor shaft, 11-active rotary frame, 12-spring seat, 13-throttle shaft, 14-first needle bearing, 15-limit block, 16-valve body, 17-second roller Needle bearing, 18-stuffed cover.

1101-opening, 3001-first torsion arm, 3002-second torsion arm, 4001-foot, 1601-first side of valve body limit block, 1602- valve body limit block second side.

Detailed ways

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Example

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , a preferred embodiment of the brushless DC motor electronic throttle body of the present invention includes a valve body 16 , a driven mechanism, a transmission mechanism and a power mechanism. Between the driven mechanism and the transmission mechanism, a limit block 15 is provided. The limiting block 15 is sleeved on the throttle shaft 13 to limit the positions of the first needle bearing 14 and the valve body 16 .

The driven mechanism is located in the valve body 16 and includes the throttle plate 2 and the throttle shaft 13 . The throttle plate 2 is fixed on the throttle shaft 13 by the throttle plate screw 1 . When the throttle shaft 13 rotates, it drives the throttle plate 2 to move, thereby controlling the size of the airflow flowing through the throttle. The throttle shaft 13 traverses the valve body 16 , and one needle bearing is provided at the connection through the side wall of the valve body 16 , which are the first needle bearing 14 and the second needle bearing 17 respectively. The first needle bearing 14 is close to the power mechanism, and the second needle bearing 17 is located in a direction away from the power mechanism. A stuffing cover 18 is arranged on the outer side of the second needle bearing 17 to isolate the inner and outer space of the valve body 16 .

The transmission mechanism is located outside the valve body 16 and consists of two parts. Wherein, the first transmission device is rigidly connected with the driven mechanism, and the second transmission device is rigidly connected with the power mechanism, but there is no rigid connection between the first transmission device and the second transmission device. A valve body limiting block is provided on the outside of the valve body 16, and has two side surfaces, which are a first side surface 1601 of the valve body limiting block and a second side surface 1602 of the valve body limiting block, respectively.

The first transmission device is composed of a spring seat 12 , a return spring 3 and a driven rotary frame 4 . The second transmission is the active rotary frame 11 . The driven swing frame 4 is welded on the throttle shaft 13 . The return spring 3 is sheathed on the spring seat 12 , and the spring seat 12 is further sheathed on the throttle shaft 13 . A first torsion arm 3001 and a second torsion arm 3002 are respectively provided at both ends of the return spring 3 . The first torsion arm 3001 is fitted to the first side surface 1601 of the valve body limiting block, and the second torsion arm 3002 is fitted to the driven rotary frame 4 . When the brushless motor 9 is not outputting, the return spring 3 presses the driven rotary frame 4 to the second side surface 1602 of the valve body limiting block. An opening 1101 is provided on the active rotating frame 11 , and a supporting foot 4001 matching the opening 1101 is set on the driven rotating frame 4 . After the assembly is completed, the legs 4001 extend into the openings 1101 . In this way, no matter which direction the active rotating frame 11 rotates, one side of the opening 1101 can always be in close contact with and push the supporting feet 4001 to drive the driven rotating frame 4 to rotate.

The power mechanism is a brushless motor 9 , and power is output through a brushless motor shaft 10 . The brushless motor 9 is fixed to the valve body 16 by screws 8 . The active rotating frame 11 is fixed to the brushless motor shaft 10 by welding. On one side of the brushless motor 9, an end cover 7 for protecting the brushless motor 9 is also provided. The end cover 7 is fixed on the brushless motor 9 through the buckle 6 . In addition, a sealing ring 5 is provided between the brushless motor 8 and the valve body 16 to further isolate the inner and outer space of the valve body 16 .

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patented scope of the present invention shall fall within the technical scope of the present invention.

Claims (10)

1. An electronic throttle body of a brushless direct current motor is characterized by comprising a valve body, a driven mechanism, a transmission mechanism and a power mechanism; the driven mechanism is positioned in the valve body; the transmission mechanism is positioned outside the valve body and comprises a first transmission device directly connected to the driven mechanism and a second transmission device directly connected to the power mechanism; the first transmission device and the second transmission device are not rigidly connected; when the power mechanism outputs power, the power mechanism drives the second transmission device to drive the first transmission device to enable the driven mechanism to act; when the power mechanism does not output, the first transmission device drives the driven mechanism to return to the initial position.

2. The brushless dc motor electronic throttle body of claim 1, wherein the follower mechanism comprises a throttle blade and a throttle shaft; the throttle plate is fixed on the throttle shaft through a throttle plate screw and rotates along with the throttle shaft.

3. The brushless dc motor electronic throttle body of claim 2, wherein the follower further comprises a needle bearing and a blank cap; the needle roller bearing is arranged at the joint of the throttle shaft and the valve body; and the blank cap is arranged outside the needle roller bearing at one end of the throttle shaft far away from the transmission mechanism.

4. The brushless dc motor electronic throttle body of claim 1, wherein the first actuator comprises a spring seat, a return spring, and a driven yoke; the driven rotating frame is fixed on the driven mechanism; the reset spring is sleeved on the spring seat and used for driving the driven mechanism to return to an initial position; the second transmission device is a driving rotating frame which is fixed on the power mechanism and used for driving the driven rotating frame to rotate.

5. The brushless dc motor electronic throttle body of claim 4, wherein an opening is provided on the driving swing frame, and a leg matching the opening is provided on the driven swing frame; the support legs extend into the openings; when the driving rotating frame rotates, one side of the opening is tightly attached to the supporting leg, and the driven rotating frame is driven to rotate.

6. The brushless dc motor electronic throttle body according to claim 4, wherein a first torsion arm and a second torsion arm are respectively provided at both ends of the return spring; the first torque arm is attached to the valve body limiting block, and the second torque arm is attached to the driven rotating frame.

7. The brushless dc motor electronic throttle body of claim 1, wherein the power mechanism is a brushless motor; the brushless motor is fixed on the valve body through the screw; the second transmission is rigidly connected to the output shaft of the brushless motor.

8. The brushless dc motor electronic throttle body of claim 7, wherein the power mechanism further comprises an end cap and a latch; the end cover is fixed on the brushless motor through the buckle.

9. The brushless dc motor electronic throttle body of claim 7, wherein a seal is disposed between the brushless dc motor and the valve body.

10. The brushless dc motor electronic throttle body of claim 1, wherein a stop is provided between the follower mechanism and the transmission mechanism.

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