JPH0244030Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is generally used in large vehicles such as trucks or buses, and is installed in the middle of the exhaust pipe to block the exhaust flow path of exhaust gas when descending steeply. The present invention relates to an improvement in the structure of a slide-type exhaust brake device that imparts a braking effect to a vehicle.

[Conventional technology]

Conventionally, this type of sliding exhaust brake device has a plate-shaped valve member 14 reciprocating in a direction substantially perpendicular to the exhaust flow path 12, as shown in FIG. The reciprocating path of the main body housing 11 of the exhaust brake device that communicates with the path 13,
The valve member 1 has an exhaust adjustment hole 15 penetrating to the rear flow path 12 side at the bottom of the front surface of the gate surface, and has a pair of hanging walls 14', 14'' protruding from the front surface thereof.
A piston culm 16 on the side of the air cylinder device, which is directly connected and fixed to the upper end of the piston culm 16, penetrates one of the hanging support walls 14' and is loosely engaged with the other hanging support wall 14'. The support wall 14'' is placed between the support walls 14' and 14'' and provided on the piston culm 16 side.
The flow path 12 by the valve member 14 is controlled by the auxiliary valve member 16'' installed on the guide wall 16' that engages with the valve member 4'.
The exhaust pressure adjustment hole 15 is closed in accordance with the closing operation of the circuit, and on the other hand, when the circuit is opened, the exhaust pressure adjustment hole 15 is opened with the movement of the auxiliary valve member 16'' before the valve member 14 moves upward, and the collection A part of the exhaust gas that was being released is released to the rear to lower the exhaust pressure applied to the valve member, and then the valve is opened.

[Problem that the invention attempts to solve]

However, in the conventional exhaust brake device, the exhaust pressure adjustment hole 1 is located at the bottom of the front surface of the valve member 14.
5 through the valve member 14, the mechanical strength of the valve member 14 itself deteriorates, and furthermore, the repeated opening and closing operations of the valve member 14 during use may cause damage to the bottom of the front surface of the valve member. This causes significant wear on the sliding surfaces between the wall surface and the auxiliary valve member 16'', which impairs their mutual tightness in a closed circuit state, resulting in an early deterioration of the braking function.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention specifically places the exhaust pressure adjustment path on the bottom wall of the reciprocating path of the main body housing, and connects it behind the bottom wall surface when the valve member is in the closed state. The tip of the piston culm on the air cylinder device side, which is provided in communication with the flow path and loosely engaged with the valve member, follows the opening/closing operation of the flow path by the valve member to open and close the exhaust pressure adjustment path. By configuring it to open and close, it does not affect the mechanical strength of the valve member itself, and also allows the opening and closing function at the entrance of the exhaust pressure adjustment path due to the movement of the tip of the piston culm in the axial direction. Therefore, we have proposed a slide type exhaust brake device that eliminates concerns about wear and can ensure the sealing of the closed exhaust pressure adjustment path over a long period of time, and effectively maintains the braking function. The purpose is to

[Means to solve the problem]

In the present invention, the reciprocating path of the plate-shaped valve member is connected to the reciprocating path of the main body housing of the exhaust brake device, in which the reciprocating path of the plate-shaped valve member is connected to the reciprocating path of the exhaust brake device, which is connected to the reciprocating path of the plate-shaped valve member in a direction substantially perpendicular to the exhaust flow path, which has connecting walls protruding from both ends with the exhaust pipe. The valve member is attached to the vicinity of the tip of the piston culm on the side of the air cylinder device, which has a member inside and is directly connected and fixed to the upper end of the main body housing, and the opening/closing operation in the flow path is performed by moving the piston culm in the vertical direction. In the exhaust brake device, an exhaust pressure adjustment path is provided on the bottom wall of the reciprocating path of the main body housing, the exhaust pressure adjustment path communicating from the bottom wall surface to the flow path behind the valve member when the valve member is in a closed circuit state. The valve member is loosely attached near the tip of a piston culm that passes through a pair of engagement walls protruding from the front surface of the valve member and has a guide wall located therebetween that engages with the engagement walls. The gist of the system is a sliding exhaust brake device configured to be engaged with the valve member and to open and close the entrance of the exhaust pressure adjustment path using the tip of the piston culm in accordance with the opening/closing operation of the flow path by the valve member. Further, the exhaust pressure adjustment path is constituted by a piping path communicating with the bottom wall surface of the reciprocating path and the flow path behind the valve member when the valve member is in a closed state.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. Fig. 1 shows a partially cutaway longitudinal cross-section of the sliding exhaust brake device of the present invention, and 1 indicates connection walls 1 with exhaust pipes at both ends. A main body housing of an exhaust brake device in which a reciprocating path 3 of a plate-shaped valve member 4 is communicated with a reciprocating path 3 of a plate-shaped valve member 4 in a direction substantially perpendicular to an exhaust flow path 2 having projecting portions ′, 1″.
A valve member 4 is installed in the reciprocating path 3, and an air cylinder device 7 is directly connected and fixed to the upper end of the main body housing 1 via a partition wall, and a piston culm 6 on the side of the air cylinder device penetrates the partition wall and its tip end. A valve member 4 is attached nearby, and a flow path 2 is created by the valve member.
The opening and closing of the piston culm 3 is performed by the vertical movement of the piston culm 3. The above-mentioned fastening means include a pair of hanging walls 4' that protrude from the front surface of the valve member 4;
4" slot, and these hanging walls 4', 4"
It is loosely engaged near the tip of a piston culm 6 which has a guide wall 6' that engages with the piston culm 6 located therebetween. Reference numeral 5 denotes an exhaust pressure adjustment path provided in the bottom wall of the reciprocating path 3 of the main body housing 1, which communicates from the bottom wall surface with the flow path 2 behind the valve member 4 in the closed state. Following the opening and closing operation of the flow passage 2, the tip 6'' of the piston culm 6, which is shaped like a truncated cone or an arc, opens and closes the inlet of the exhaust pressure regulating passage 5. Before the member 4 moves upward, as the tip 6'' on the piston culm 6 side moves away, the exhaust pressure adjustment path 5 is opened, and a part of the collected exhaust gas is released to the rear, and the valve member 4, and when the valve member 4 is closed, its inlet is closed by the tip 6'' before the valve member 4 moves downward. 8 urges the piston member upward. It is a coil spring member, and 9 is a quick supply/exhaust valve device that is attached to the upper part of the air cylinder device 7 and connected to an external high-pressure gas supply source (not shown).The solid arrow indicates the direction of flow of exhaust gas. This shows that.

[Effect]

Since the present invention is configured in this way, when the flow passage 2 is closed by the valve member 4, the piston culm 6 is moved downward as high pressure gas is supplied from the outside to the cylinder device 7, and the piston is moved downward. The guide wall 6' on the culm side is engaged with the hanging support wall 4'', and the valve member 4 is pressed to close the flow passage 2.
The exhaust pressure adjustment path 5 is connected to the tip 6'' of the piston culm 6.
When the inlet of the piston is closed, the braking function is exerted.On the other hand, when the inlet is opened, the piston culm 6 moves upward, so that its tip 6'' is connected to the exhaust pressure adjustment path 5.
A part of the exhaust gas that has accumulated away from the inlet of the exhaust gas is released from the exhaust pressure adjustment path to the rear flow path 2 side, thereby reducing the exhaust pressure applied to the valve member 4, and at the same time reducing the exhaust gas that has been collected by the guide wall 6'. The engagement with the wall 4' causes the valve member 4 to be pulled upward, thereby opening the flow passage 2 and releasing the braking function.

[Effect of idea]

As explained above, the slide type exhaust brake device of the present invention is particularly advantageous in that the exhaust pressure adjustment path 5 is connected to the bottom wall of the reciprocating path 3 of the valve member 4 of the main body housing 1, and the exhaust pressure adjustment path 5 is connected to the bottom wall of the valve member 4 in the closed circuit state. The tip 6'' of the piston culm 6 is connected to the flow passage 2 behind the piston culm 6.
As the valve member 4 moves in the axial direction, the exhaust pressure adjustment path 5 follows the opening/closing operation of the flow path 2 by the valve member 4.
Since the inlet is configured to open and close, the position and structure of the exhaust pressure regulating passage 5 do not affect the mechanical strength of the valve member 4 itself, and the tip 6'' of the piston culm 6 By adjusting the opening and closing in the axial direction at the inlet of the exhaust pressure regulating path 5, there is no fear of wear, and therefore, the sealing at the inlet can be ensured, especially when the path is closed, and at the same time, mutual contact at the inlet can be ensured. This is an extremely useful slide-type exhaust brake device that can maintain its braking function effectively over a long period of time due to its wear-resistant structure.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a sliding exhaust brake device according to an embodiment of the present invention, and FIG. 2 is a partially cutaway sectional view of the main parts of a conventional product. 1...Body housing, 2...Flow path, 3...
Reciprocating path, 4... Valve member, 4', 4''... A pair of hanging walls, 5... Exhaust pressure adjustment path, 6... Piston culm, 6'
...Guidance wall, 6″...Tip.

Claims (1)

[Claims for Utility Model Registration] 1. Claims for a main body housing of an exhaust brake device in which a reciprocating path of a plate-shaped valve member is communicated with a reciprocating path of a plate-shaped valve member in a direction substantially perpendicular to an exhaust flow path having protruding connecting walls with an exhaust pipe at both ends. The valve member is installed in the reciprocating path, and the valve member is engaged near the tip of the piston culm on the side of the air cylinder device, which is directly connected and fixed to the upper end of the main body housing, and the opening/closing operation in the flow path is controlled by the piston culm. In the exhaust brake device, a flow path 2 is provided at the bottom wall of the reciprocating path 3 of the main body housing 1 by moving the valve member 4 in the vertical direction from the bottom wall surface.
An exhaust pressure adjustment path 5 communicating with the valve member 4 is provided.
A guide wall 6' is provided between the valve member and the guide wall 6', which passes through a pair of retaining walls 4' and 4'' projecting from the front surface of the valve member and engages with the retaining walls 4' and 4''. The vicinity of the tip of the piston culm 6 is loosely engaged, and following the opening/closing operation of the flow passage 2 by the valve member 4, the tip 6'' of the piston culm 6 closes the entrance of the exhaust pressure regulating passage 5. A sliding type exhaust brake device characterized in that it is configured to open and close.2 Utility Model Registration Claim 1 In the claim 1, the exhaust pressure regulating passage 5 is arranged between the bottom wall surface of the reciprocating passage 3 and the valve member 4. A slide type exhaust brake device characterized in that it is constituted by a piping path that communicates with a flow path 2 behind it when in a closed circuit state.