An exhaust structure on an exhaust brake control cylinder

Abstract

This utility model proposes an exhaust structure for an exhaust brake control cylinder, including a cylinder body with a piston chamber inside. The front end of the cylinder body has a connecting hole that communicates with and penetrates the piston chamber. The outer diameter of the cylinder body segment corresponding to the piston chamber is larger than the outer diameter of the segment corresponding to the connecting hole. The two cylinder body segments are connected by an inclined plane. An exhaust hole penetrating the inclined plane is provided on the bottom surface of the piston chamber near the connecting hole. Two ends of a cover are respectively wrapped around the outer walls of the two cylinder body segments. The cover has through holes with filters installed at the through holes. A cover is installed at the exhaust hole of the cylinder body, forming an air chamber between the cover and the outer wall of the cylinder body. The cover has through holes with filters installed at the through holes, thus forming an air path of outside—through hole—air chamber—exhaust hole—piston chamber. The filter prevents external debris from entering the piston chamber.

Description

Technical Field

[0001] This utility model relates to the field of exhaust brake control cylinder technology, specifically to an exhaust structure on an exhaust brake control cylinder. Background Technology

[0002] The exhaust brake control cylinder is a key actuator in the exhaust brake system. Its main function is to achieve engine exhaust braking by controlling the opening, closing or throttling of the exhaust passage, thereby helping the vehicle to decelerate. It is widely used, especially in heavy trucks, large buses and other vehicles.

[0003] The exhaust brake control cylinder typically consists of a cylinder body, piston, push rod, spring, and other components. Its working process is as follows:

[0004] When the driver operates the exhaust brake switch (such as by pressing a specific pedal or button), compressed air (or hydraulic oil, depending on the vehicle model) enters the air chamber (or oil chamber) of the control cylinder.

[0005] Pneumatic (or hydraulic) pressure drives the piston to move, compressing the return spring and simultaneously causing the push rod to extend.

[0006] The push rod connects to the exhaust brake valve (such as a butterfly valve), which pushes the valve to close or partially close the engine exhaust pipe, thus blocking the exhaust passage.

[0007] When the pressure inside the exhaust pipe increases, the engine piston has to overcome greater resistance during the exhaust stroke, creating a braking effect, reducing the engine speed, and thus slowing down the vehicle.

[0008] After the exhaust brake switch is released, the compressed air (or hydraulic oil) in the control cylinder air chamber (or oil chamber) is discharged, the return spring pushes the piston and push rod back to their original positions, the exhaust brake valve opens, and the exhaust brake is released.

[0009] When compressed air enters the control cylinder, the piston moves. At this time, the air in the control cylinder needs to be discharged. In the existing technology, exhaust ports are usually set directly on the side wall of the control cylinder. During the reciprocating movement of the piston, outside air needs to enter and exit the control cylinder through the exhaust port. How to prevent external debris from entering the control cylinder through the exhaust port is a problem that needs to be solved. Utility Model Content

[0010] In view of the problems pointed out in the background art, this utility model proposes an exhaust structure on an exhaust brake control cylinder to solve the above-mentioned technical problems.

[0011] The technical solution of this utility model is implemented as follows:

[0012] An exhaust structure for an exhaust brake control cylinder includes a cylinder body, a piston chamber within the cylinder body, and a connecting hole at the front end of the cylinder body that communicates with and extends through the piston chamber.

[0013] The outer diameter of the cylinder body corresponding to the piston chamber is larger than the outer diameter of the cylinder body corresponding to the connecting hole, and the two cylinder bodies are connected by an inclined plane.

[0014] An exhaust port with a through-bevel is provided on the bottom surface of the piston chamber near the connection hole;

[0015] It also includes a ring-shaped cover, with both ends of the cover wrapping around the outer walls of the two cylinder sections. The cover has through holes with filter screens installed at the through holes.

[0016] The present invention is further configured such that the exhaust hole and the through hole are misaligned.

[0017] The present invention is further configured such that an air cavity is formed between the outer wall of the cover and the outer wall of the cylinder.

[0018] The present invention is further configured such that a first connecting segment and a second connecting segment are formed on the outer wall of the cylinder body corresponding to the piston cavity. The first connecting segment is located between the second connecting segment and the inclined surface. The outer diameter of the first connecting segment is smaller than the outer diameter of the second connecting segment. The outer diameter of the second connecting segment is smaller than the outer diameter of the cylinder body corresponding to the piston cavity. One end of the cover is clamped on the second connecting segment.

[0019] The present invention is further configured such that one end of the cover forms an outwardly folding guide portion.

[0020] The present invention is further configured such that the other end of the cover is clamped onto the outer wall of the cylinder corresponding to the section of the connecting hole.

[0021] The present invention is further configured such that the filter screen is disposed on the inner side wall of the cover.

[0022] The present invention is further configured such that the air chamber is located between the cover and the cylinder body corresponding to the connecting hole.

[0023] The present invention is further configured such that a push rod is connected inside the connecting hole, a piston connected to the push rod is provided inside the piston chamber, and a spring is sleeved on the push rod.

[0024] The present invention is further configured such that the cover is made of metal material.

[0025] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0026] The exhaust structure for the exhaust brake control cylinder provided by this utility model features a cover at the exhaust port of the cylinder body, forming an air chamber between the cover and the outer wall of the cylinder body. A through-hole is provided on the cover, and a filter screen is installed at the through-hole, thus creating an air path from the outside—through-hole—air chamber—exhaust port—piston chamber. The filter screen prevents external debris from entering the piston chamber. The air chamber between the cover and the cylinder body has a certain size, and the exhaust port, penetrating the inclined surface, directly communicates with the air chamber, satisfying the airflow requirements. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is an exploded view of the present invention.

[0030] Figure 3 This is a cross-sectional view of the present invention.

[0031] Figure 4 This is a partial structural schematic diagram of the present invention.

[0032] The following are the labels in the attached diagram: cylinder 1, piston chamber 2, connecting hole 3, inclined surface 4, exhaust port 5, cover 6, through hole 7, filter screen 8, air chamber 9, first connecting section 10, second connecting section 11, guide part 12, push rod 13, spring 14. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] For reference as follows Figures 1-4 The present invention will be described as follows:

[0035] Example: An exhaust structure on an exhaust brake control cylinder includes a cylinder body 1, a piston chamber 2 inside the cylinder body 1, and a connecting hole 3 at the front end of the cylinder body 1 that communicates with the piston chamber 2 and passes through the front end of the cylinder body 1.

[0036] The cylinder block 1 has two sections with different outer diameters. The outer diameter of the cylinder block section corresponding to the piston chamber 2 is larger than that of the cylinder block section corresponding to the connecting hole 3. The two sections are smoothly transitioned by the inclined surface 4, forming a stepped outer contour.

[0037] The piston chamber 2 has an exhaust port 5 on the bottom surface near the connection hole 3, which is a through inclined surface 4; thus, it becomes a direct channel for gas exchange between the piston chamber 2 and the external environment.

[0038] It also includes an annular cover 6, whose two ends are tightly fitted to the outer walls of the cylinder 1 with different outer diameters, forming an encircling connection, so that the cover 6 and the outer wall of the cylinder 1 form a closed air chamber 9, which is specifically located between the cover 6 and the cylinder corresponding to the connecting hole 3.

[0039] The cover 6 has a through hole 7, and a filter screen 8 is fixedly installed at the through hole 7. The exhaust hole 5 and the through hole 7 are misaligned in space and have no direct correspondence.

[0040] An air chamber 9 is formed between the outer wall of the cover 6 and the outer wall of the cylinder 1. The air chamber 9 is located between the cover 6 and the cylinder 1 corresponding to the section of the connecting hole 3.

[0041] The air path formed by the above structure is "outside - through hole 7 - air chamber 9 - exhaust hole 5 - piston chamber 2".

[0042] When air needs to enter the piston chamber 2, outside air enters through the through hole 7 on the cover 6 under pressure, and enters the air chamber 9 after being filtered by the filter screen 8. The air chamber 9 serves as a transition space, temporarily storing the air and distributing it evenly. Subsequently, the air enters the piston chamber 2 through the exhaust hole 5, completing the air intake process.

[0043] When exhaust is required in piston chamber 2, the gas inside the chamber enters gas chamber 9 sequentially through exhaust port 5, and then exits to the outside through through port 7, realizing the reverse flow of gas. The connectivity of each link in the entire path ensures the smooth flow of gas and meets the needs of gas entry and exit due to changes in gas pressure within piston chamber 2.

[0044] The cover 6, with its annular design, cooperates with the two outer side walls of the cylinder 1 to form a closed air chamber 9, providing a transition space for gas flow. At the same time, the encircling connection of the cover 6 ensures the airtightness of the air chamber 9, preventing gas leakage along non-preset paths and ensuring that gas can only be exchanged through the through hole 7 and the exhaust hole 5.

[0045] The filter screen 8, installed at the through hole 7, acts directly on the air entering the air chamber 9. Its main function is to intercept impurities in the outside air and prevent these impurities from entering the piston chamber 2 through the exhaust hole 5. This interception function can prevent impurities from adhering to the surface of components such as the piston and spring, reducing the risk of component wear or jamming, and ensuring the normal operation of the control cylinder.

[0046] The air chamber 9, enclosed by the cover 6 and the outer wall of the cylinder 1, has a certain spatial capacity. This space can buffer pressure fluctuations during gas flow, ensuring a stable airflow before the gas enters the exhaust port 5. This prevents local turbulence at the exhaust port 5 caused by airflow impact, ensuring the stability of gas entering and exiting the piston chamber 2. Simultaneously, the existence of the air chamber 9 creates an indirect connection between the exhaust port 5 and the through hole 7, providing a structural basis for their staggered arrangement.

[0047] The staggered arrangement of the exhaust port 5 and the through port 7 prevents external debris from being directly drawn into the exhaust port 5 through the through port 7 by the airflow, increasing the path length and obstruction for impurities to enter the piston chamber 2. Even if a small amount of tiny impurities are not completely intercepted by the filter screen 8, they are unlikely to accurately enter the exhaust port 5 after being diffused through the air chamber 9, further reducing the probability of impurity intrusion.

[0048] The positional relationship between the inclined surface 4 and the exhaust port 5 is such that the exhaust port 5 penetrates through the inclined surface 4. The angle of the inclined surface 4 ensures that the inlet and outlet directions of the exhaust port 5 are aligned with the air chamber 9, reducing resistance to gas flow. Simultaneously, the structure of the inclined surface 4 enhances the structural strength of the cylinder block 1 at this location, preventing localized stress concentration caused by the exhaust port 5 and ensuring the overall stability of the cylinder block 1.

[0049] The direct filtration of the filter screen 8 and the misalignment of the exhaust port 5 and the through hole 7 form a dual protection mechanism, effectively preventing external debris from entering the piston chamber 2, ensuring the cleanliness of the internal components of the control cylinder, and reducing the risk of failure caused by impurities.

[0050] The space capacity of the air chamber 9 provides ample buffer space for gas flow. Combined with the structural cooperation of the exhaust port 5 and the inclined surface 4, it reduces the resistance when the gas enters and exits, ensuring the timeliness and smoothness of gas exchange in the piston chamber 2, and meeting the response requirements of the control cylinder to changes in air pressure during braking and releasing the brake.

[0051] The design of the difference in the outer diameter of the two sections of cylinder 1 and the transition connection of the inclined surface 4 not only meet the functional requirements of piston chamber 2 and connecting hole 3, but also enhance the overall structural strength of cylinder 1; the ring-shaped installation of cover 6 ensures the sealing of air chamber 9, so that the entire exhaust structure remains stable and reliable during operation.

[0052] A first connecting section 10 and a second connecting section 11 are formed on the outer wall of the cylinder 1 corresponding to the piston chamber 2. The first connecting section 10 is located between the second connecting section 11 and the inclined surface 4. The outer diameter of the first connecting section 10 is smaller than the outer diameter of the second connecting section 11, and the outer diameter of the second connecting section 11 is smaller than the outer diameter of the cylinder 1 corresponding to the piston chamber 2. This stepped outer diameter design provides a precise positioning reference for the installation of the cover 6, allowing one end of the cover 6 to be stably clamped onto the second connecting section 11, ensuring the firmness of the connection between the cover 6 and the cylinder 1.

[0053] One end of the cover 6 is clamped onto the second connecting section 11, and the other end of the cover 6 is clamped onto the outer wall of the cylinder 1 corresponding to the connecting hole 3. This clamping connection method ensures the airtightness of the air chamber 9, prevents gas leakage on non-preset paths, and ensures that gas can only be exchanged through the through hole 7 and the exhaust hole 5.

[0054] One end of the cover 6 forms an outwardly folded guide section 12. This guide section serves as a guide during installation, facilitating precise alignment between the cover 6 and the cylinder 1.

[0055] The filter screen 8 is installed on the inner wall of the cover 6.

[0056] The two ends of the cover 6 are clamped onto the cylinder 1, but they do not form a complete seal. Air will flow through the air chamber 9 and the through hole 7 first.

[0057] A push rod 13 is connected to the connecting hole 3, and a piston connected to the push rod 13 is located in the piston chamber 2. A spring 14 is sleeved on the push rod 13. When the exhaust brake is engaged, the piston moves within the piston chamber 2, transmitting force through the push rod 13. When the brake is released, the spring 14 uses its own elasticity to push the piston and push rod 13 back to their original positions, ensuring the normal switching of the exhaust brake system. The connection between the push rod 13 and the connecting hole 3 ensures the stability of force transmission, allowing the piston's movement to effectively act on the exhaust brake valve.

[0058] The cover 6 is made of metal.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An exhaust structure for an exhaust brake control cylinder, comprising a cylinder body, a piston chamber within the cylinder body, and a connecting hole at the front end of the cylinder body communicating with and penetrating the piston chamber, characterized in that: The outer diameter of the cylinder body corresponding to the piston chamber is larger than the outer diameter of the cylinder body corresponding to the connecting hole, and the two cylinder bodies are connected by an inclined plane. An exhaust port with a through-beam is provided on the bottom surface of the piston chamber near the connection hole; It also includes a ring-shaped cover, with both ends of the cover wrapping around the outer walls of the two cylinder sections. The cover has through holes with filter screens installed at the through holes.

2. The exhaust structure on the exhaust brake control cylinder according to claim 1, characterized in that: The exhaust port and the through hole are misaligned.

3. The exhaust structure on a brake control cylinder according to claim 1, characterized by: An air cavity is formed between the outer wall of the cover and the outer wall of the cylinder.

4. The exhaust structure on a brake control cylinder according to claim 1, characterized by: A first connecting section and a second connecting section are formed on the outer wall of the cylinder body corresponding to the piston chamber. The first connecting section is located between the second connecting section and the inclined surface. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section. The outer diameter of the second connecting section is smaller than the outer diameter of the cylinder body corresponding to the piston chamber. One end of the cover is clamped onto the second connecting section.

5. The exhaust structure on an exhaust brake control cylinder according to claim 4, characterized in that: One end of the cover is formed into an outward-folding guide section.

6. The exhaust structure on an exhaust brake control cylinder according to claim 4, characterized in that: The other end of the cover is clamped onto the outer wall of the cylinder corresponding to the connecting hole.

7. The exhaust structure on an exhaust brake control cylinder according to claim 1, characterized in that: The filter screen is installed on the inner wall of the cover.

8. The exhaust structure on an exhaust brake control cylinder according to claim 3, characterized in that: The air chamber is located between the cover and the cylinder body corresponding to the connecting hole.

9. The exhaust structure on an exhaust brake control cylinder according to claim 1, characterized in that: A push rod is connected to the connection hole, and a piston connected to the push rod is provided in the piston chamber. A spring is sleeved on the push rod.

10. The exhaust structure on an exhaust brake control cylinder according to claim 1, characterized in that: The cover is made of metal.

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