JPH0996228A - Exhaust brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust an exhaust gas pressure by an exhaust brake valve, by providing a bypass passage and through holes inside a valve body of the exhaust brake valve, and adjusting a flow amount of exhaust gas passing through the through hole by in/out moving operation of an adjusting bolt. SOLUTION: In an exhaust brake valve 1, an exhaust passage 4 with exhaust gas passing is formed in a valve body 5 having large thickness in an upper part, a brake valve element 7 opening/closing this exhaust passage 14 is rotatably provided. A bypass passage 9 and through holes 10, 11, communicating with the exhaust passage 4, are formed in an internal peripheral surface of the large thickness part of the valve body 5, in this way, even when the valve element 7 is placed in a fully opened condition when the exhaust brake valve 1 is operated, exhaust gas can be circulated through the through holes 10, 11 and the bypass passage 9, so that an exhaust gas pressure cart be suppressed from its excessive rise. Here, by adjusting in/out movement of an adjusting bolt 6 relating to the through hole 11, a flow amount of exhaust gas passing through the through hole 11 can be properly set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust brake device that closes an exhaust brake valve arranged midway in an exhaust pipe of a vehicle or the like to operate a brake.

[0002]

2. Description of the Related Art As conventional exhaust brake devices, there are those shown in FIGS. 5 and 6, for example. The exhaust brake device includes an exhaust brake valve 51 arranged in the middle of an exhaust pipe of a vehicle, and an exhaust passage 52 through which exhaust gas passes is formed inside the exhaust brake valve 51.
A brake valve body 54 and a lever 55 are attached to a valve shaft 53 of the exhaust brake valve 51, and the tip of the lever 55 is connected to a piston rod 58 of a control cylinder 57 via a clevis 56.

However, in the exhaust brake device, when compressed air from a tank (not shown) is supplied to the working pressure chamber 59 of the control cylinder 57, the control cylinder 5
7 operates to slide the piston 60, and the valve shaft 53 is rotated through the piston rod 58 and the lever 55 which are coupled to the piston 60 and move in and out, and the brake valve body 54 is closed to perform the exhaust brake. It is designed to work.
In the figure, the arrow a indicates the direction of exhaust gas flow.

[0004]

However, in the above-described conventional exhaust brake device, as shown in FIG. 5, a pair of stopper bolts 62 and 63 are provided on the bracket 61 with a space therebetween, and the lever 55 is provided with these stopper bolts. 62,
It rotates between 63, and as a result, the exhaust brake valve 5
When the valve 1 is closed, the angle of the brake valve body 54 is adjusted by the stopper bolts 62 and 63 so that the exhaust gas pressure does not rise excessively and the engine is not damaged, so that the clearance S is opened, and the exhaust gas is exhausted through the clearance S. The passage 52 is designed to flow from the upstream side to the downstream side. However, since the adjustment width of the stopper bolts 62 and 63 is narrow and the angle of the brake valve body 54 is too sensitive, the adjustment is complicated and time-consuming.
There was a risk of variations in the adjustment of exhaust gas pressure.
Further, in the conventional exhaust brake device, since a pair of stopper bolts 62 and 63 are required, there is a problem that the number of parts increases and the cost increases.

The present invention has been made in view of such an actual situation, and an object thereof is to easily adjust the exhaust gas pressure by an exhaust brake valve and to reduce the variation, thereby reducing the number of parts. An object of the present invention is to provide an exhaust brake device that can reduce the cost.

[0006]

In order to solve the above-mentioned problems of the prior art, in the present invention, a valve shaft of an exhaust brake valve, which is arranged in the middle of an exhaust pipe and has an exhaust passage formed therein, is provided. In an exhaust brake device that opens and closes a brake valve body by rotating it with a lever, an adjusting bolt is attached to a valve body of the exhaust brake valve, and a bypass passage and a through hole are provided inside the valve body. Is communicated with the exhaust passage of the exhaust brake valve via the through hole, and the flow rate of the exhaust gas passing through the through hole is adjusted by the movement of the adjusting bolt.

In the exhaust brake device according to the present invention, an adjusting bolt is attached to the valve body of the exhaust brake valve, a bypass passage and a through hole are provided inside the valve body, and the bypass passage is provided through the through hole. Since the flow rate of the exhaust gas passing through the through hole is adjusted by the movement of the adjustment bolt in communication with the exhaust passage of the exhaust brake valve, the exhaust gas pressure can be easily adjusted by the exhaust brake valve. It is possible to eliminate the pair of brake valve body angle adjusting stopper bolts, which were required in the conventional exhaust brake device.

In another aspect of the present invention, the brake valve body is opened and closed by rotating a valve shaft of an exhaust brake valve, which is disposed in the middle of the exhaust pipe and has an exhaust passage formed therein, with a lever. In an exhaust brake device, an adjusting bolt is attached to a valve body of the exhaust brake valve, a recess is provided on an inner wall surface of the valve body, and a flow rate of exhaust gas passing through the recess is adjusted by an operation of moving the adjusting bolt in and out. Is configured as follows.

In another exhaust brake system according to the present invention,
An adjustment bolt is attached to the valve body of the exhaust brake valve, and a recess is provided on the inner wall surface of the valve body, and the flow rate of exhaust gas passing through the recess is adjusted by the movement of the adjustment bolt. Therefore, similarly to the above-described invention, the exhaust gas pressure can be easily adjusted, and the pair of brake valve body angle adjusting stopper bolts can be eliminated.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments.

1 and 2 show an embodiment of an exhaust brake device according to the present invention. The exhaust brake device in the figure includes an exhaust brake valve 1 arranged in the middle of an exhaust pipe (not shown) of a four-wheeled vehicle or the like, and a control cylinder 2 that controls the operation of the exhaust brake valve 1. The control cylinder 2 is attached to the exhaust brake valve 1 via a bracket 3.

The exhaust brake valve 1 has a cylindrical valve body 5 having a thick upper portion, and an exhaust passage 4 through which exhaust gas passes is formed inside the valve body 5. There is. An adjusting bolt 6 for adjusting the flow rate of exhaust gas is attached to the upper portion of the valve body 5. For this reason, the adjustment bolt 6 is formed such that the tip end side thereof has a length capable of projecting into a bypass passage described later, and can be moved in and out of a through hole described later by tightening or loosening. Moreover, since the exhaust brake valve 1 is disposed at a location where vibration is great, the adjusting bolt 6 is screwed with a double nut to prevent loosening due to vibration.

A brake valve body 7 that opens and closes the exhaust passage 4 is provided inside the valve body 5 so as to be rotatable about an axis, and the central portion of the brake valve body 7 is an exhaust brake. It is attached to one end of the valve shaft 8 of the valve 1. Further, as shown in FIG. 2, the bypass passage 9 and the through hole 10, the through hole 10,
11 is provided in association with the brake valve body 7, and the bypass passage 9 is formed so as to communicate with the exhaust passage 4 via the through holes 10 and 11. That is, these through holes 1
0 and 11 are provided on the upstream side and the downstream side of the exhaust gas with the brake valve body 7 in between, and the through hole 11 on the downstream side is set so as to be located below the tip of the adjusting bolt 7. .
Note that, in FIGS. 1 and 2, the arrow a indicates the direction in which the exhaust gas flows.

On the other hand, the other end of the valve shaft 8 is disposed so as to project outward from the side surface of the valve body 5 and the bracket 3, and the other end is attached with the base end of the lever 12. The valve shaft 8 is rotated by the lever 12. Therefore, the tip of the lever 12 is connected to the piston rod 15 of the control cylinder 2 via the clevis 14 joined by the pin 13.

Further, the lever 12 is adapted to rotate between a pair of L-shaped blocks 16 and 17, as shown in FIG.
As shown by the solid line, the exhaust brake valve 1 is in the fully open state when it comes into contact with one block 16, and when it comes into contact with the other block 17 as shown by the chain line in FIG.
Is fully closed and the exhaust brake works. Therefore, the blocks 16 and 17 are fixed to the outer surface of the bracket 3 with a predetermined space therebetween.

The control cylinder 2 is provided with a cylinder housing 20 composed of a housing body 18 and a cover plate 19 on one end side bolted to a flange portion of the housing body 18. Further, in the control cylinder 2, a supply port 21 is opened in the cover plate 19 and a connector 22 is screwed thereto, and a piston rod 15 is arranged so as to project from the other end side. Further, a slidable piston 23 is housed at one end of the cylinder housing 20, and a return spring 24 is housed at the other end. Moreover, the working pressure chamber 25 is formed in the cylinder housing 20 by the piston 23.

The piston 23 is connected to the inner end of the piston rod 15 by a nut 26. When compressed air is supplied to the working pressure chamber 25 during operation of the exhaust brake device, the piston 23 moves forward in the cylinder housing 20. Then, the piston rod 15 is moved to the exhaust brake valve 1 side, and is returned to the supply port 21 side by the urging force of the return spring 24 when the exhaust brake device is not operating.

When operating the exhaust brake device of the present embodiment, compressed air is supplied to the supply port 21 of the control cylinder 2 from a tank (not shown), and this compressed air is introduced into the working pressure chamber 25 through the supply port 21. Get burned. Along with this, the pressure in the working pressure chamber 25 rises, and the piston 23 moves toward the exhaust brake valve 1 side against the biasing force of the return spring 24. At the same time, piston rod 15
When the brake valve body 7 in the valve body 5 is fully closed by rotating the valve shaft 8 of the exhaust brake valve 1 clockwise through the lever 12 shown in FIG.
The exhaust brake will work.

At this time, the exhaust brake valve 1 of the present embodiment
Then, the exhaust gas in the exhaust passage 4 on the upstream side passes through the through hole 10, the bypass passage 9 and the through hole 11, and the exhaust passage 4 on the downstream side.
Flow through the through hole 1 when the adjusting bolt 6 moves in and out.
Since the flow rate of the exhaust gas passing through No. 1 is properly set, the exhaust gas pressure does not rise too high.

Further, when the exhaust brake is released to bring it into a non-operating state, if the supply of compressed air to the supply port 21 of the control cylinder 2 is stopped, the piston 23 is returned by the urging force of the return spring 24, The compressed air in the working pressure chamber 25 is discharged through a solenoid valve (not shown), and at the same time, the piston rod 15 enters and operates, and the valve shaft 8 of the exhaust brake valve 1 rotates counterclockwise via the lever 12, The brake valve body 7 in the body 5 is fully opened, and the exhaust brake does not work.

According to the present embodiment, the exhaust brake valve 1
Even if the brake valve body 7 is fully closed during the operation of the exhaust gas, the exhaust gas flows from the upstream side to the downstream side in the exhaust passage 4 through the through holes 10 and 11 and the bypass passage 9, so that the exhaust gas pressure becomes excessive. Can suppress the rise of. Also, the through hole 11
On the other hand, when the adjusting bolt 6 is moved in and out, the flow rate of the exhaust gas passing through the through hole 11 can be set to an appropriate amount with little variation, so that the exhaust gas pressure can be easily adjusted. . Further, since the adjusting bolt 6 is composed of a double nut, loosening due to vibration can be reliably prevented.

FIGS. 3 and 4 show another embodiment of the exhaust brake device according to the present invention, and FIGS.
The same parts as those of the invention of FIG. In the exhaust brake valve 1 in this exhaust brake device, the bypass passage 9 and the through holes 10, 1 of the invention described above are used.
Instead of 1, the concave portion 39 is provided on the inner wall surface of the upper portion of the valve body 35 in association with the brake valve body 7, and the tip end side of the adjusting bolt 6 can move in and out of the concave portion 39. There is. Other configurations and operations are almost the same as those of the above invention.

According to the present embodiment, the exhaust brake valve 1
The cross-sectional shape of the valve body 35 is simpler than that of the valve body 5 shown in FIG.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications and changes can be made based on the technical idea of the present invention. is there.

For example, the adjusting bolt 6 in the above-described embodiment is a double nut in order to prevent loosening due to vibration, but when the location where the exhaust brake valve 1 is installed is small in vibration, the adjusting bolt 6 is not a double nut, and is adjusted. A spring may be arranged between the head of the bolt 6 and the upper surface of the valve body 5, 35. Further, in the above-described embodiment, the adjusting bolt 6 is arranged at the downstream side of the downstream through hole 11 and the recess 39, but the adjusting bolt 6 is located at the upstream through hole 10 and the recess 39.
It is also possible to arrange it in the upstream side position.

[0026]

As described above, in the exhaust brake device according to the present invention, the valve shaft of the exhaust brake valve, which is disposed in the middle of the exhaust pipe and has the exhaust passage formed therein, is rotated by the lever. For opening and closing the brake valve,
An adjustment bolt is attached to the valve body of the exhaust brake valve, a bypass passage and a through hole are provided inside the valve body, and the bypass passage is communicated with the exhaust passage of the exhaust brake valve through the through hole. It is configured to adjust the flow rate of the exhaust gas that passes through the through hole by the movement of the adjustment bolt, so it becomes possible to adjust the exhaust gas pressure with the exhaust brake valve quickly and easily. Of the exhaust gas can be improved and the variation of the exhaust gas pressure can be reduced. Moreover, according to the exhaust brake device of the present invention, the pair of stopper bolts used in the conventional exhaust brake device for adjusting the angle of the brake valve body can be eliminated, so that the cost can be reduced by reducing the number of parts. You can

Further, in another exhaust brake device according to the present invention, a brake valve is provided by rotating a valve shaft of an exhaust brake valve, which is arranged in the middle of an exhaust pipe and has an exhaust passage formed therein, with a lever. The body is opened and closed, and an adjusting bolt is attached to the valve body of the exhaust brake valve, and a recess is provided on the inner wall surface of the valve body. Since it is configured to adjust the flow rate, the exhaust gas pressure can be adjusted quickly and easily with a simpler structure than the above-described invention, and the cost can be reduced by eliminating the pair of stopper bolts. Can be planned.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an exhaust brake device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing an exhaust brake valve used in the exhaust brake device of the present embodiment.

FIG. 3 is a front view showing an exhaust brake device according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an exhaust brake valve of the exhaust brake device in FIG.

FIG. 5 is a configuration diagram showing a conventional exhaust brake device.

FIG. 6 is a cross-sectional view showing an exhaust brake valve used in a conventional exhaust brake device.

[Explanation of symbols]

 1 Exhaust Brake Valve 2 Control Cylinder 3 Bracket 4 Exhaust Passage 5,35 Valve Body 6 Adjustment Bolt 7 Brake Valve Disc 8 Valve Shaft 9 Bypass Passage 10, 11 Through Hole 12 Lever 13 Pin 14 Clevis 15 Piston Rod 20 Cylinder Housing 21 Supply Port 23 Piston 24 Return Spring 25 Working Pressure Chamber 39 Recess

Claims (2)

[Claims] 1. An exhaust brake device that opens and closes a brake valve body by rotating a valve shaft of an exhaust brake valve, which is disposed in the middle of an exhaust pipe and has an exhaust passage formed therein, with a lever, An adjusting bolt is attached to the valve body of the brake valve, a bypass passage and a through hole are provided inside the valve body, and the bypass passage is communicated with the exhaust passage of the exhaust brake valve through the through hole. The exhaust brake device is configured to adjust the flow rate of the exhaust gas passing through the through hole by the movement of the exhaust gas. 2. An exhaust brake device that opens and closes a brake valve body by rotating a valve shaft of an exhaust brake valve, which is arranged in the middle of an exhaust pipe and has an exhaust passage formed therein, with a lever, An adjustment bolt is attached to the valve body of the brake valve, a recess is provided on the inner wall surface of the valve body, and the flow rate of exhaust gas passing through the recess is adjusted by the movement of the adjustment bolt. Exhaust brake device.