JPH0517391Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is generally installed in the middle of the exhaust pipe of large vehicles such as trucks or buses, and is used to control the discharge of exhaust gas flowing through the exhaust pipe when going down a steep slope. The present invention relates to an improvement in the structure of a sliding type exhaust brake device that is closed to provide a braking effect to a vehicle.

[Prior Art] Conventionally, this type of exhaust brake device has a brake body in which a reciprocating path of a plate-shaped valve member is passed directly through a flow path approximately perpendicular to a flow path in which a connecting wall with an exhaust pipe is provided on the outer wall of the brake body. A second valve having a structure in which the valve member is housed in a housing and is engaged near the tip of a piston rod that penetrates a partition formed by an air cylinder device connected to an end of a reciprocating path. As illustrated in the figure, the partition wall has a base wall 19 having a concave groove 20 on the upper surface side, and a separate body of the same diameter that is fitted and overlapped to form an annular hollow chamber on the upper surface of the base wall. and an adapter wall 21.

[Problems to be solved by the invention] In general, these exhaust brake devices are constantly exposed to exhaust gas from the engine while driving, so the temperature becomes extremely high, which is transmitted to the air cylinder device side. It is necessary to reduce thermal effects as much as possible to ensure smooth and reliable operation, and countermeasures are currently desired.

However, in the conventional exhaust brake device, the air cylinder device structure is made of aluminum, the base wall 19 is made of iron, and the adapter wall 21 is made of aluminum.
In addition, due to heat transfer from the brake body side in the groove 20 forming the annular hollow chamber, heat affects the air cylinder device side, and when driving for a long time, the air cylinder device side is exposed to a high temperature state. This often causes damage to the packing made of rubber or resin material that is stretched around the circumferential surface of the piston, reducing its functionality and impeding its long-term service life.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention provides a base wall that directly connects the housing of the brake body to one end surface of the partition wall, and an air cylinder device to the other end surface of the partition wall. The heat dissipation performance is significantly improved by constructing the base joint, which is a single unit with an approximately E-shaped overall vertical cross section, and has an annular groove-shaped heat dissipation space along its outer circumferential surface. This reduces the heat effect on the air cylinder device side, eliminates the worry of deterioration of the piston member due to the packing, prevents the piston function from deteriorating even during long-term driving, allows smooth and reliable operation, and improves the quality of the product. The purpose of this invention is to propose a sliding type exhaust brake device that can be used for a long period of time.

[Means for Solving the Problems] The present invention provides a structure in which a reciprocating path of a plate-shaped valve member is directly passed through the housing of the exhaust brake body in a direction substantially perpendicular to a flow path in which a connecting wall with an exhaust pipe is protruded from the outer wall. The valve member is installed inside the piston rod, and the valve member is attached to the vicinity of the tip of the piston rod that penetrates the base wall and the adapter wall that form a partition wall from the air cylinder device connected to one end of the reciprocating path. In an exhaust brake device in which a valve member opens and closes a flow path in conjunction with the sliding of a piston rod, the partition wall has a base wall that directly connects the housing of the flake body to one end surface thereof, and a base wall that directly connects the housing of the flake body to one end surface thereof, and the other end surface thereof. A slide consisting of a single base joint having an approximately E-shaped overall vertical cross section and having an adapter wall that directly connects an air cylinder device to the adapter wall and an annular concave heat dissipating space along the outer circumferential surface of the slide. The main feature is a type exhaust brake device, and furthermore, cooling fins radially extending outward are formed in the concave groove-shaped heat dissipation space of the base joint.

[Embodiment] Hereinafter, an embodiment of the present invention will be described based on the drawings. Fig. 1 is a partially cutaway side view of the slide type exhaust brake device of the present invention, and 1 is a side view showing an exhaust brake device on the outer wall. An exhaust system in which connecting walls 1' and 1'' with a pipe are provided in a protruding manner, and an exhaust gas flow path 2 is provided inside, and a reciprocating path 4 of a plate-shaped valve member is directly passed through the flow path in a direction substantially perpendicular to the flow path. A housing for the brake body. Reference numeral 3 denotes the valve member installed in the flow path 2, and an air cylinder device 5 having an intake and exhaust mechanism 7 at the top where the valve part is connected to the upper end of the reciprocating path 4. A coil spring 8 always urges upward a piston member (not shown) installed in the air cylinder device 5; is a base joint that is formed as a single partition wall and has a substantially E-shaped overall cross section in the vertical direction, and has a base wall 9a to which the housing 1 of the brake body is directly connected to one end surface, and a base wall 9a to which the housing 1 of the brake body is directly connected to the other end surface. It has an adapter wall 9b that directly connects the air cylinder device 5, and has an annular groove-shaped heat dissipation space 10 along its outer peripheral surface.11 is the groove-shaped groove of the base joint 9 as desired. The cooling fins are radially outwardly protruding from the heat dissipation space 10, and may be integrated with the base joint 9, or may be separately formed cooling fins with good heat dissipation performance such as aluminum material. It may be fixed to the base joint 9 by press fitting or welding. 12 is the base joint 9.
This is a bushing provided on the sliding surface between the piston rod 6 and the piston rod 6.

[Function] Since the present invention is configured as described above, the base station is made of a single unit having an annular groove-shaped heat dissipation space 10 along the outer peripheral surface as the partition wall and whose overall vertical cross section is approximately E-shaped. By using the int 9, the heat transfer area from the housing 1 of the brake body to the air cylinder device 5 side is significantly reduced, and it is insulated as a thermal barrier to suppress the heat transfer effect, and the groove-shaped heat radiation space 10 This promotes heat dissipation and prevents the packing material stretched over the outer peripheral surface of the piston member from deteriorating due to the influence of heat. Furthermore, since the fitting portion is located at a single location between the adapter wall 9b of the base joint 9 and the air cylinder device 5, centering can be facilitated during assembly.

[Effects of the Invention] As explained above, the slide type exhaust brake device according to the present invention reduces the thermal influence on the air cylinder device 5 by the above-mentioned action, so that the deterioration of the piston member due to the packing is reduced. The sliding type exhaust system is extremely useful because it can fully utilize the piston function and operate smoothly and reliably even during long-distance driving, and it also allows the product to last for a long time. It is a brake device.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a sliding exhaust brake device according to an embodiment of the present invention, and FIG.
The figure is a partial longitudinal cross-sectional view of a conventional example through a notch near a partition wall. DESCRIPTION OF SYMBOLS 1... Housing, 5... Air cylinder device, 9... Base joint, 10... Heat radiation space, 11... Cooling fin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Inside the housing of the exhaust brake body, the reciprocating path of the plate-shaped valve member passes directly in a direction substantially perpendicular to a flow path in which a connecting wall with an exhaust pipe is protruded from the outer wall. The valve member is attached to the vicinity of the tip of a piston rod that penetrates through a base wall and an adapter wall that form a partition wall from an air cylinder device in which the valve member is installed and connected to one end of a reciprocating path, In an exhaust brake device in which a valve member opens and closes a flow path in conjunction with the sliding movement of a piston rod, the partition wall has a base wall 9a that directly connects the housing 1 of the brake body to one end surface thereof, and a base wall 9a that directly connects the housing 1 of the brake body to one end surface thereof, and the other end surface thereof. A base joint 9 consisting of a single unit having an adapter wall 9b that directly connects the air cylinder device 5 to the air cylinder device 5, and having an annular concave heat radiation space 10 along its outer circumferential surface and having a substantially E-shaped overall longitudinal cross section. A slide type exhaust brake device characterized by comprising: (2) Utility model registration Claim 1, wherein cooling fins 1 configured to radiate heat outward are provided in 10 portions of the groove-shaped heat radiating space of the base joint 9.
1. A sliding exhaust brake device characterized in that it is formed by protruding.