Three-circle semi-trailer three-bridge brake valve

Abstract

The utility model discloses a three-circle semi-trailer three-axle brake valve, which relates to the technical field of valves, and comprises an upper shell and a lower shell, the inner side of the upper shell is respectively provided with a main pressure regulating structure and a secondary pressure regulating structure, and the secondary pressure regulating structure comprises a rear axle pressure regulating assembly, a middle axle pressure regulating assembly and a front axle pressure regulating assembly; a rear axle brake chamber control outlet, a middle axle brake chamber control outlet and a front axle brake chamber control outlet are formed in the lower shell, and lower exhaust ports are formed in the positions, located at the lower ends of the rear axle pressure adjusting assembly, the middle axle pressure adjusting assembly and the front axle pressure adjusting assembly, in the upper shell. Lower air guide ports are formed in the lower shell and located at the lower ends of the three lower exhaust ports. According to the three-circle semi-trailer three-axle brake valve, independent air pressure adjustment of a front axle, a middle axle and a rear axle can be achieved through the overall structural matching design, and therefore three-axle asynchronous air pressure output during braking is achieved, and the problem that air pressure is not synchronous during braking is thoroughly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a three-circular semi-trailer three-bridge brake valve. Background Art

[0002] At present, the existing three-axle trailer brake valve products on the market all have a circular main cavity with six air outlets for synchronous air pressure output. Since the weight-bearing force of the three axles of the semi-trailer is uneven, the front axle bears the least weight, the middle axle bears the middle weight, and the rear axle bears the most weight, this causes the front axle wheels to lock first during driving braking, resulting in serious tire wear, increased braking distance and safety hazards, and greatly increased transportation costs. Installing ABS on the trailer can effectively prevent the tires of the empty vehicle from locking, but the braking force is insufficient when loading, the cost is high, and the subsequent maintenance costs are high, which also increases the transportation cost. For this reason, the present application proposes a three-circular semi-trailer three-axle brake valve. Utility Model Content

[0003] Based on this, it is necessary to provide a three-circular semi-trailer three-bridge brake valve to address the above technical problems. Through the overall structural coordination design, independent air pressure adjustment of the front, middle and rear axles can be achieved, thereby realizing asynchronous air pressure output of the three axles during braking, completely solving the problem of asynchronous air pressure during braking, greatly shortening the braking distance, improving safety and reducing transportation costs.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A three-circular semi-trailer three-bridge brake valve, which is applied to a three-bridge trailer;

[0006] It comprises an upper shell and a lower shell, the upper shell and the lower shell are fitted together, a main pressure regulating structure and a secondary pressure regulating structure are respectively arranged on the inner side of the upper shell, the secondary pressure regulating structure comprises a rear axle pressure regulating assembly, a middle axle pressure regulating assembly and a front axle pressure regulating assembly, and the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all in communication with the interior of the main pressure regulating structure;

[0007] The lower shell body is provided with a rear axle brake air chamber control outlet, a middle axle brake air chamber control outlet and a front axle brake air chamber control outlet respectively; the upper shell body is provided with lower exhaust ports at the lower ends of the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly; the lower shell body is provided with lower air guide ports at the lower ends of the three lower exhaust ports; the three lower air guide ports are respectively communicated with the rear axle brake air chamber control outlet, the middle axle brake air chamber control outlet and the front axle brake air chamber control outlet; a sealed air duct is also provided between the upper shell body and the lower shell body and on the inner side of the rear axle brake air chamber control outlet.

[0008] As a preferred embodiment of the three-circular semi-trailer three-bridge brake valve provided by the utility model, the sealed air duct includes an air inlet, an air inlet is opened inside the lower shell body and located on the inner side of the rear axle brake air chamber control outlet, an air outlet is opened inside the lower shell body and located on the upper end of the rear axle brake air chamber control outlet, the air inlet and the air outlet are internally communicated, an air flow channel is opened at the upper end of the lower shell body and located on the outer side of the air outlet, the air outlet is communicated with the inside of the air flow channel, a rising air port is opened inside the upper shell body and located at the lower end of the main pressure regulating structure, and the main pressure regulating structure and the air flow channel are both communicated with the inside of the rising air port.

[0009] As a preferred embodiment of the three-circular semi-trailer three-bridge brake valve provided by the utility model, three circular sealing gaskets are also arranged on the inner side of the upper end of the lower shell, and the bottom end of the upper shell is fitted with the three circular sealing gaskets.

[0010] As a preferred embodiment of the three-circular semi-trailer three-bridge brake valve provided by the utility model, brake pistons are arranged on the inner side of the lower shell and located at the inner sides of the rear axle brake air chamber control outlet, the middle axle brake air chamber control outlet and the front axle brake air chamber control outlet, and dustproof bottom frames are arranged at the lower end of the lower shell and located at the lower ends of the rear axle brake air chamber control outlet, the middle axle brake air chamber control outlet and the front axle brake air chamber control outlet.

[0011] As a preferred embodiment of the three-circular semi-trailer three-bridge brake valve provided by the utility model, the main pressure regulating structure is composed of a first valve, a first piston, a first compression spring, a spring gasket, a fixed pressure regulating cap, a dust cap, an adjusting screw and a nut.

[0012] As a preferred embodiment of the three-circular semi-trailer three-bridge brake valve provided by the utility model, the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all composed of a second piston, a second compression spring, a second valve, an adjusting top column, a fixing nut and a dust cover.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The three-circular semi-trailer three-bridge brake valve provided by the utility model can realize independent air pressure adjustment of the front, middle and rear axles through the overall structural coordination design, thereby realizing asynchronous air pressure output of the three axles during braking, completely solving the problem of asynchronous air pressure during braking, greatly shortening the braking distance, improving safety and reducing transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of the three-circular semi-trailer three-bridge brake valve provided by the utility model;

[0017] Figure 2 An exploded view of the overall structure of the three-circular semi-trailer three-bridge brake valve provided by the utility model;

[0018] Figure 3 A schematic diagram of the structure of the upper housing of the three-circular semi-trailer three-bridge brake valve provided by the utility model;

[0019] Figure 4 This is a schematic structural diagram of the lower housing of the three-circular semi-trailer three-bridge brake valve provided by the utility model.

[0020] The markings in the figure are as follows:

[0021] 1. Upper shell; 2. Lower shell; 3. Main pressure regulating structure; 4. Secondary pressure regulating structure; 5. Rear axle brake chamber control outlet; 6. Middle axle brake chamber control outlet; 7. Front axle brake chamber control outlet; 8. Rising air port; 9. Lower exhaust port; 10. Air inlet; 11. Air outlet; 12. Air flow channel; 13. Three circular sealing gaskets; 14. Lower air guide port; 15. Dustproof bottom frame; 16. Brake piston. DETAILED DESCRIPTION

[0022] As described in the background technology, the existing three-axle trailer brake valve products on the market currently all have a circular main cavity with six air outlets for synchronous air pressure output. Since the weight-bearing force of the three axles of the semi-trailer is uneven, the front axle bears the least weight, the middle axle bears the middle weight, and the rear axle bears the most weight, this causes the front axle wheels to lock first during driving braking, resulting in severe tire wear, increased braking distance and safety hazards, and greatly increased transportation costs. Installing ABS on the trailer can effectively prevent the tires of the empty vehicle from locking, but the braking force is insufficient when loading, the cost is high, and the subsequent maintenance costs are high, which also increases transportation costs.

[0023] In order to solve this technical problem, the utility model provides a three-circular semi-trailer three-bridge brake valve, which is applied to a three-bridge trailer;

[0024] It includes an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are fitted together, a main pressure regulating structure 3 and a secondary pressure regulating structure 4 are respectively arranged on the inner side of the upper shell 1, the secondary pressure regulating structure 4 includes a rear axle pressure regulating assembly, a middle axle pressure regulating assembly and a front axle pressure regulating assembly, and the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all communicated with the inside of the main pressure regulating structure 3;

[0025] A rear axle brake air chamber control outlet 5, a middle axle brake air chamber control outlet 6 and a front axle brake air chamber control outlet 7 are respectively provided inside the lower shell 2, lower exhaust ports 9 are provided inside the upper shell 1 and at the lower ends of the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly, lower air guide ports 14 are provided inside the lower shell 2 and at the lower ends of the three lower exhaust ports 9, the three lower air guide ports 14 are respectively communicated with the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7, and a sealed air duct is also provided between the upper shell 1 and the lower shell 2 and on the inner side of the rear axle brake air chamber control outlet 5.

[0026] The three-circular semi-trailer three-bridge brake valve provided by the utility model can realize independent air pressure adjustment of the front, middle and rear axles through the overall structural coordination design, thereby realizing asynchronous air pressure output of the three axles during braking, completely solving the problem of asynchronous air pressure during braking, greatly shortening the braking distance, improving safety and reducing transportation costs.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] Please refer to Figure 1-4 A three-circular semi-trailer three-bridge brake valve comprises an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are fitted together, a main pressure regulating structure 3 and a secondary pressure regulating structure 4 are respectively arranged on the inner side of the upper shell 1, the secondary pressure regulating structure 4 comprises a rear axle pressure regulating assembly, a middle axle pressure regulating assembly and a front axle pressure regulating assembly, and the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all communicated with the main pressure regulating structure 3;

[0030] Among them, the main pressure regulating structure 3 is composed of a first valve, a first piston, a first compression spring, a spring gasket, a fixed pressure regulating cap, a dust cap, an adjusting screw and a nut; and the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all composed of a second piston, a second compression spring, a second valve, an adjusting top column, a fixed screw cap and a dust cover;

[0031] The lower housing 2 is provided with a rear axle brake air chamber control outlet 5, a middle axle brake air chamber control outlet 6 and a front axle brake air chamber control outlet 7, respectively. A brake piston 16 is provided on the inner side of the lower housing 2 and located inside the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7. A dustproof bottom frame 15 is provided at the lower end of the lower housing 2 and located at the lower end of the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7.

[0032] When the airflow enters the inner side of the rear axle brake air chamber control outlet 5, in order to conveniently guide the airflow into the main pressure regulating structure 3, and then firstly regulate the air pressure as a whole through the main pressure regulating structure 3, a sealed air passage is further provided between the upper shell 1 and the lower shell 2 and located on the inner side of the rear axle brake air chamber control outlet 5;

[0033] Specifically, the sealed air passage includes an air inlet 10, an air inlet 10 is provided inside the lower shell 2 and located inside the rear axle brake air chamber control outlet 5, an air outlet 11 is provided inside the lower shell 2 and located at the upper end of the rear axle brake air chamber control outlet 5, the air inlet 10 and the air outlet 11 are internally communicated, an air flow channel 12 is provided at the upper end of the lower shell 2 and located outside the air outlet 11, the air outlet 11 is internally communicated with the air flow channel 12, an ascending air port 8 is provided inside the upper shell 1 and located at the lower end of the main pressure regulating structure 3, and the main pressure regulating structure 3 and the air flow channel 12 are both communicated with the interior of the ascending air port 8;

[0034] When the airflow enters the inner side of the airflow channel 12 from the air inlet 10 and the air outlet 11, in order to further improve the sealing performance between the upper shell 1 and the lower shell 2, three circular sealing gaskets 13 are further provided on the inner side of the upper end of the lower shell 2, and the bottom end of the upper shell 1 fits with the three circular sealing gaskets 13, so that the airflow can enter the main pressure regulating structure 3 from the airflow channel 12 and the rising air port 8, and the main pressure regulating structure 3 first performs overall pressure regulation on the airflow;

[0035] The main pressure regulating structure 3 and the secondary pressure regulating structure 4 are internally connected, so that after the airflow is pressure-regulated as a whole by the main pressure regulating structure 3, the airflow is evenly distributed to the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly, and then the airflow is pressure-regulated differently by the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly, thereby realizing asynchronous pressure output;

[0036] At this time, in order to facilitate the re-introduction of the airflows of different pressures adjusted in the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly into the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7, lower exhaust ports 9 are provided inside the upper shell 1 and at the lower ends of the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly, and lower air guide ports 14 are provided inside the lower shell 2 and at the lower ends of the three lower exhaust ports 9, and the lower exhaust ports 9 are internally communicated with the lower air guide ports 14 by the sealing of the three circular sealing gaskets 13, and then the three lower air guide ports 14 are respectively communicated with the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7, so that the airflow contacts the brake piston 16 to control its stable downward movement to achieve soft braking;

[0037] The use process of the three-circular semi-trailer three-bridge brake valve provided by the utility model is as follows: when the vehicle body brakes, the airflow enters the control outlet 5 of the rear axle brake air chamber, and then is guided into the main pressure regulating structure 3 by the sealed airway, and then the airflow is overall pressure regulated by the main pressure regulating structure 3, specifically: the compression force of the first compression spring is increased or decreased by adjusting the adjusting screw in the forward and reverse directions respectively, so that the opening stroke of the first valve is increased or decreased, so that the pressure flowing to the secondary pressure regulating structure 4 is higher or lower, and the pressure is higher when the first valve is opened more, and the pressure is lower when the first valve is opened less;

[0038] When the airflow after pressure regulation by the main pressure regulating structure 3 is evenly distributed and enters the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly in the secondary pressure regulating structure 4, similarly, the compression force of the second compression spring is increased or decreased by adjusting the top column in the positive and negative directions, thereby increasing or decreasing the opening stroke of the second valve. When the second valve is opened more and the pressure is higher, the brake is softer, and when the second valve is opened less and the pressure is lower, the brake is stronger.

[0039] After the airflow is asynchronously pressure-regulated by the secondary pressure-regulating structure 4, it is redirected to the rear axle brake air chamber control outlet 5, the middle axle brake air chamber control outlet 6 and the front axle brake air chamber control outlet 7 through the lower exhaust port 9 and the lower air guide port 14, so that the three airflows with different pressures are in contact with the three brake pistons 16 respectively, so as to control the brake piston 16 to move downward stably and realize soft braking.

Claims

1. A three-circular semi-trailer three-bridge brake valve, characterized in that: The invention comprises an upper shell (1) and a lower shell (2), wherein the upper shell (1) and the lower shell (2) are fitted together, and a main pressure regulating structure (3) and a secondary pressure regulating structure (4) are respectively arranged on the inner side of the upper shell (1), and the secondary pressure regulating structure (4) comprises a rear axle pressure regulating assembly, a middle axle pressure regulating assembly and a front axle pressure regulating assembly, and the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all in communication with the interior of the main pressure regulating structure (3); The lower shell (2) is provided with a rear axle brake air chamber control outlet (5), a middle axle brake air chamber control outlet (6) and a front axle brake air chamber control outlet (7) respectively; the upper shell (1) is provided with a lower exhaust port (9) at the lower ends of the rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly; the lower shell (2) is provided with a lower air guide port (14) at the lower ends of the three lower exhaust ports (9); the three lower air guide ports (14) are respectively connected to the rear axle brake air chamber control outlet (5), the middle axle brake air chamber control outlet (6) and the front axle brake air chamber control outlet (7); and a sealed air passage is also provided between the upper shell (1) and the lower shell (2) and at the inner side of the rear axle brake air chamber control outlet (5).

2. The three-circular semi-trailer three-bridge brake valve according to claim 1, characterized in that: The sealed air passage comprises an air inlet (10), an air inlet (10) is provided inside the lower shell (2) and located inside the rear axle brake air chamber control outlet (5), an air outlet (11) is provided inside the lower shell (2) and located at the upper end of the rear axle brake air chamber control outlet (5), the air inlet (10) and the air outlet (11) are internally communicated, an air flow channel (12) is provided at the upper end of the lower shell (2) and located outside the air outlet (11), the air outlet (11) is internally communicated with the air flow channel (12), an ascending air port (8) is provided inside the upper shell (1) and located at the lower end of the main pressure regulating structure (3), the main pressure regulating structure (3) and the air flow channel (12) are both internally communicated with the ascending air port (8).

3. The three-circular semi-trailer three-bridge brake valve according to claim 2, characterized in that: Three circular sealing gaskets (13) are also provided on the inner side of the upper end of the lower shell (2), and the bottom end of the upper shell (1) is in contact with the three circular sealing gaskets (13).

4. The three-circular semi-trailer three-bridge brake valve according to claim 1, characterized in that: A brake piston (16) is provided on the inner side of the lower shell (2) and located at the inner side of the rear axle brake air chamber control outlet (5), the middle axle brake air chamber control outlet (6) and the front axle brake air chamber control outlet (7), and a dustproof bottom frame (15) is provided at the lower end of the lower shell (2) and located at the lower end of the rear axle brake air chamber control outlet (5), the middle axle brake air chamber control outlet (6) and the front axle brake air chamber control outlet (7).

5. The three-circular semi-trailer three-bridge brake valve according to claim 1, characterized in that: The main pressure regulating structure (3) is composed of a first valve, a first piston, a first compression spring, a spring gasket, a fixed pressure regulating cap, a dustproof cap, an adjusting screw and a nut.

6. The three-circular semi-trailer three-bridge brake valve according to claim 1, characterized in that: The rear axle pressure regulating assembly, the middle axle pressure regulating assembly and the front axle pressure regulating assembly are all composed of a second piston, a second compression spring, a second valve, an adjusting top column, a fixing screw nut and a dust cover.

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