CN114087074A

CN114087074A - Exhaust throttle valve

Info

Publication number: CN114087074A
Application number: CN202111608679.9A
Authority: CN
Inventors: 陈剑; 戴益锋; 孙晓峰; 许杰; 王东东
Original assignee: Anhui Aozhong Auto Parts Co ltd
Current assignee: Anhui Aozhong Auto Parts Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-02-25

Abstract

The invention relates to the technical field of exhaust aftertreatment of automobile engines, in particular to an exhaust throttle valve which is characterized by comprising a valve body, a driven mechanism, a transmission mechanism, a speed change mechanism and a power mechanism, wherein the valve body is provided with a valve body; the driven mechanism is positioned in the valve body; the transmission mechanism is positioned outside the valve body, is protected by a bracket and comprises a first transmission device connected to the driven mechanism and a second transmission device connected to the power mechanism through the speed change 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 through the speed change mechanism 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. Compared with the prior art, the exhaust throttle valve has the characteristics of high temperature resistance and simple structure by adopting a mechanically separated transmission mechanism, thereby reducing the cost and improving the benefit.

Description

Exhaust throttle valve

Technical Field

The invention relates to the technical field of exhaust aftertreatment of automobile engines, in particular to an exhaust throttle valve.

Background

In an automotive engine exhaust system, an exhaust throttle valve is used to regulate and control the flow of engine exhaust. Because the temperature of the gas discharged by the automobile engine is higher, the high-temperature waste gas passes through the exhaust throttle valve, and the exhaust throttle valve is in a severe gas environment.

Disclosure of Invention

The present invention aims to provide an exhaust throttle valve, which aims to solve the above problems.

The invention provides an exhaust throttle valve which is characterized by comprising a valve body, a driven mechanism, a transmission mechanism, a speed change mechanism and a power mechanism, wherein the driven mechanism is arranged on the valve body; the driven mechanism is positioned in the valve body; the transmission mechanism is positioned outside the valve body, is protected by a bracket and comprises a first transmission device connected to the driven mechanism and a second transmission device connected to the power mechanism through the speed change 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 through the speed change mechanism 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.

Further, the follower mechanism includes a throttle blade and a valve shaft; the throttle blade is rigidly fixed to the valve shaft and rotates with the valve shaft.

Further, the follower mechanism comprises a needle bearing and a blank cap; the needle bearing is arranged at one end, close to the transmission mechanism, of the valve shaft; and the blank cap is arranged at one end of the valve shaft, which is far away from the transmission mechanism.

Further, the valve also comprises a shaft sleeve and a sealing sheet which are used for closing a gap between the driven mechanism and the valve body; the shaft sleeve is sleeved on the valve shaft; the sealing sheet is sleeved at the position, close to the inner side of the valve body, of the shaft sleeve; the shape of the sealing piece is matched with that of the valve shaft and used for isolating gas inside and outside the valve body.

Furthermore, the outer diameter of the valve shaft is suddenly changed at the position, close to the inner side of the valve body, of the shaft sleeve to form a step; the sealing piece is annular, and the suit is in on the step, the sealing piece internal diameter with constitute the external diameter of the less cylinder of step matches.

Furthermore, the outer diameter of the valve shaft is gradually reduced at the position, close to the inner side of the valve body, of the shaft sleeve, so that a conical surface is formed; the sealing sheet is annular, and the inner side of the sealing sheet is provided with a round angle matched with the conical surface; the sealing piece suit is in on the valve shaft, the sealing piece internal diameter with constitute the external diameter of the less cylinder of conical surface matches, the fillet laminating the conical surface.

Further, the first transmission device comprises a return spring and a lower rotating frame; the lower rotary frame is fixed on the driven mechanism; the reset spring is sleeved on the valve body and drives the lower rotating frame to drive the driven mechanism to return to an initial position; the second transmission device is an upper rotating frame which is fixed on the speed change mechanism and used for driving the lower rotating frame to rotate by overcoming the elasticity of the return spring.

Furthermore, an opening is arranged on the upper swing frame, and a support leg matched with the opening is arranged on the lower swing frame; the support legs extend into the openings; when the upper rotary frame rotates, one side of the opening is tightly attached to the supporting leg, and the lower rotary frame is driven to rotate.

Further, the speed change mechanism comprises a motor gear, an intermediate gear and a reset gear; the motor gear is rigidly connected to an output shaft of the power mechanism; when the motor gear rotates, the intermediate gear is driven to rotate, the reset gear is driven by the intermediate gear, and finally the reset gear shaft of the reset gear supplies power to the transmission mechanism.

Further, the power mechanism is a direct current motor; and an end cover for protecting the direct current motor is arranged on one side of the direct current motor.

Compared with the prior art, the exhaust throttle valve has the characteristics of high temperature resistance and simple structure by adopting a mechanically separated transmission mechanism, thereby reducing the cost and improving the benefit.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of the exhaust throttle valve of the present invention;

FIG. 2 is another schematic illustration of the construction of a preferred embodiment of the exhaust throttle valve of the present invention;

FIG. 3 is a schematic view showing an assembled structure of an upper bracket and a lower bracket in a preferred embodiment of the exhaust throttle valve of the present invention;

FIG. 4 is a schematic view showing an assembly structure of a sealing plate and a valve shaft in a preferred embodiment of the exhaust throttle valve according to the present invention;

FIG. 5 is a schematic view showing an assembly structure of a sealing plate and a valve shaft according to another preferred embodiment of the exhaust throttle valve of the present invention;

figure 6 is a schematic view of the sealing disc structure of figure 5.

The device comprises an end cover 1, a motor gear 2, a middle gear 3, a reset gear 4, a reset gear shaft 5, a needle roller bearing 6, an upper swing frame 7, a lower swing frame 8, a shaft sleeve 9, a reset spring 10, a sealing sheet 11, a support 12, a valve shaft 13, a throttle sheet 14, a blank cap 15, a valve body 16 and a direct current motor 17;

71-opening, 81-leg, 131-taper, 111-fillet.

Detailed Description

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

Examples

Referring to fig. 1 to 6, a preferred embodiment of the exhaust throttle valve of the present invention comprises a valve body 16, a driven mechanism, a transmission mechanism, a speed change mechanism and a power mechanism. When the power mechanism outputs power, the power mechanism drives the second transmission device through the speed change mechanism 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 follower mechanism is located within the valve body 16 and includes a throttle blade 14 and a valve shaft 13. The valve shaft 13 penetrates the valve body 16, and the throttle blade 14 is rigidly fixed to the valve shaft 13 and is rotated by the valve shaft 13 to adjust the gas flow rate of the exhaust throttle valve. The needle bearing 6 is arranged at one end of the valve shaft 13 close to the transmission mechanism, and the blank cap 15 is arranged at one end of the valve shaft 13 far away from the transmission mechanism to isolate the inner space and the outer space of the valve body 16.

Where the valve shaft 13 passes through the valve body 13, a boss 9 and a seal plate 11 for closing a gap between the valve shaft 13 and the valve body 16 are provided. The hub 9 and the sealing plate 11 are both fitted over the valve spindle 13, wherein the sealing plate 11 is mounted below the hub 9, i.e. close to the position inside the valve body 16. The valve shaft 13 has different shapes, and the shape of the sealing sheet 11 needs to match with the shape of the valve shaft 13, so as to isolate the air inside and outside the valve body 16.

In one way (as shown in fig. 4), at the bottom of the sleeve 9 (i.e. at the mounting position of the sealing plate 11), the outer diameter of the valve shaft 13 is formed to be a sudden change, so that two cylinders with different diameters are formed, and a step is formed at the joint of the two cylinders. At this time, the annular sealing sheet 11 made of metal is sleeved on the smaller cylinder on the step, and the inner diameter of the annular sealing sheet 11 is matched with the outer diameter of the smaller cylinder to play a role in sealing. The annular sealing disc 11 can also be welded directly to the smaller cylinder.

Alternatively (as shown in fig. 5 and 6), the two cylinders of different diameters forming the valve shaft 13 are transitioned by a tapered surface 131 at a position where the sleeve 9 is close to the inside of the valve body 16. A round corner 111 matching with the conical surface 131 is arranged at the inner bottom of the metal annular sealing sheet 11. After the sealing plate 11 is sleeved on the smaller cylinder of the valve shaft 13, the inner diameter of the sealing plate 11 is matched with the outer diameter of the smaller cylinder, and meanwhile, the fillet 111 is attached to the conical surface 131 to play a role in sealing.

The transmission mechanism is located outside the valve body 16, protected by the support 12, and comprises a first transmission connected to the valve shaft 13 and a second transmission connected to the power mechanism through a gear change mechanism. There is no rigid connection between the first transmission and the second transmission.

The first transmission comprises a return spring 4 and a lower rotating frame 8. The lower swing frame 8 is welded to the valve shaft 13. The reset spring 10 is sleeved on the valve body 16, one end of the reset spring is fixed on the valve body 16, and the other end of the reset spring is attached to the lower rotating frame 8 to drive the driven mechanism to return to the initial position. The second transmission device is an upper rotating frame 7 welded on the reset gear shaft 5 and used for driving a lower rotating frame 8 to rotate against the elastic force of the reset spring 4. An opening 71 is provided in the upper swing frame 7, and a leg 81 matching the opening 71 is provided in the lower swing frame 8. After assembly, the legs 81 extend into the openings 71. Then, no matter which side the upper swing frame 7 is rotated, the side having the opening 71 is closely attached to and drives the leg 81, thereby rotating the lower swing frame 8.

The speed change mechanism comprises a motor gear 2, an intermediate gear 3 and a reset gear 4. The motor gear 2 is rigidly connected to the output shaft of the dc motor 17. When the motor gear 2 rotates, the intermediate gear 3 is driven to rotate, the intermediate gear 3 drives the reset gear 4, and finally, the reset gear shaft 5 of the reset gear 4 provides power for the upward rotating frame 7. By adjusting the gear ratio of the motor gear 2, the intermediate gear 3 and the reset gear 4, the output of the direct current motor 17 and the input required to drive the throttle blade 14 can be matched, thereby adapting to a wider range of power requirements.

The power mechanism is a direct current motor 17. On one side of the dc motor 17, an end cover 1 for protecting the dc motor 17 is provided.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be within the technical scope of the present invention.

Claims

1. An exhaust throttle valve is characterized by comprising a valve body, a driven mechanism, a transmission mechanism, a speed change mechanism and a power mechanism; the driven mechanism is positioned in the valve body; the transmission mechanism is positioned outside the valve body, is protected by a bracket and comprises a first transmission device connected to the driven mechanism and a second transmission device connected to the power mechanism through the speed change 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 through the speed change mechanism 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 exhaust throttle valve according to claim 1, wherein the driven mechanism includes a throttle blade and a valve shaft; the throttle blade is rigidly fixed to the valve shaft and rotates with the valve shaft.

3. The exhaust throttle valve of claim 2, wherein the follower mechanism comprises a needle bearing and a blank cap; the needle bearing is arranged at one end, close to the transmission mechanism, of the valve shaft; and the blank cap is arranged at one end of the valve shaft, which is far away from the transmission mechanism.

4. The exhaust throttle valve according to claim 2, further comprising a sleeve and a seal for closing a gap between the driven mechanism and the valve body; the shaft sleeve is sleeved on the valve shaft; the sealing sheet is sleeved at the position, close to the inner side of the valve body, of the shaft sleeve; the shape of the sealing piece is matched with that of the valve shaft and used for isolating gas inside and outside the valve body.

5. The exhaust throttle valve according to claim 4, wherein the outer diameter of the valve shaft is abruptly changed at a position where the boss is located near the inside of the valve body to form a step; the sealing piece is annular, and the suit is in on the step, the sealing piece internal diameter with constitute the external diameter of the less cylinder of step matches.

6. The exhaust throttle valve according to claim 4, wherein the valve shaft is tapered in outer diameter to form a tapered surface at a position where the boss is located close to the inside of the valve body; the sealing sheet is annular, and the inner side of the sealing sheet is provided with a round angle matched with the conical surface; the sealing piece suit is in on the valve shaft, the sealing piece internal diameter with constitute the external diameter of the less cylinder of conical surface matches, the fillet laminating the conical surface.

7. The exhaust throttle valve of claim 1, wherein the first transmission means comprises a return spring and a lower spin frame; the lower rotary frame is fixed on the driven mechanism; the reset spring is sleeved on the valve body and drives the lower rotating frame to drive the driven mechanism to return to an initial position; the second transmission device is an upper rotating frame which is fixed on the speed change mechanism and used for driving the lower rotating frame to rotate by overcoming the elasticity of the return spring.

8. The exhaust throttle valve according to claim 7, wherein an opening is provided on the upper swing frame, and a leg matching the opening is provided on the lower swing frame; the support legs extend into the openings; when the upper rotary frame rotates, one side of the opening is tightly attached to the supporting leg, and the lower rotary frame is driven to rotate.

9. The exhaust throttle valve according to claim 1, wherein the speed change mechanism includes a motor gear, an intermediate gear, and a return gear; the motor gear is rigidly connected to an output shaft of the power mechanism; when the motor gear rotates, the intermediate gear is driven to rotate, the reset gear is driven by the intermediate gear, and finally the reset gear shaft of the reset gear supplies power to the transmission mechanism.

10. The exhaust throttle valve according to claim 1, wherein the power mechanism is a direct current motor; and an end cover for protecting the direct current motor is arranged on one side of the direct current motor.