Pneumatic hand brake external control air cut-off trailer control valve and tractor

Abstract

The utility model relates to a pneumatic hand brake external control air cut-off trailer control valve and a tractor, which comprise a valve I and a valve II, the valve I is provided with an air inlet and an air outlet, and the air inlet is communicated with the air outlet; the air inlet is communicated with one end of an air source pipeline; the air source pipeline is communicated with a spring interface at one end of the valve I through a pipeline; the second valve is provided with a first connector, a second connector, a third connector and a fourth connector, the first connector is communicated with the air outlet through an air inlet pipeline, and the connector at the other end of the first valve is communicated with the air inlet pipeline through a pipeline; the first connector is communicated with the second connector, and the third connector is communicated with the fourth connector or the first connector. The trailer braking device has the advantages of being simple in structure, reasonable in design, good in braking effect, time-saving and labor-saving, and braking of the trailer is achieved by controlling energization of the air source.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves for tractors, in particular to a pneumatic handbrake externally controlled air cut-off trailer control valve and a tractor. Background Art

[0002] Existing pneumatic brake trailer systems mostly use a single-line braking system with a single braking mode, and the trailer parking brake usually uses an anti-slip block, which is not very reliable and safe. The utility model provides a pneumatic handbrake externally controlled air cut-off trailer control valve. By controlling the direction of the air line, the trailer brake is achieved, which has a better braking effect, saves time and effort, and is safer. Utility Model Content

[0003] The utility model provides a pneumatic handbrake externally controlled air cut-off trailer control valve and a tractor, aiming to solve the problems in the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A pneumatic handbrake externally controlled air cut-off trailer control valve comprises valve 1 and valve 2, wherein the valve 1 is provided with an air inlet and an air outlet, the air inlet being connected to the air outlet; the air inlet being connected to one end of an air source pipeline, and the air source pipeline being connected to a spring interface at one end of the valve 1 through a pipeline;

[0006] The valve two is provided with interface one, interface two, interface three and interface four. The interface one is connected with the air outlet through the air inlet pipe, and the interface on the other end of the valve one is connected with the air inlet pipe through a pipe; the interface one is connected with the interface two, and the interface three is connected with the interface four or the interface one.

[0007] The beneficial effects of the utility model are as follows: during operation, when driving, the air inlet, the air outlet, the first interface and the second interface are always connected;

[0008] When the foot pedal is pressed, the air path enters the air inlet, the air outlet, interface 1 and interface 2, and interface 3 is connected to the air source to achieve trailer braking;

[0009] When the foot pedal is released, the valve core of valve 2 is reset and exhaust is carried out through port 4;

[0010] When parking, pull the handbrake, and the air path enters the air inlet, air outlet, interface 1 and interface 3. Interface 3 is connected to the air source to achieve trailer braking.

[0011] The utility model has a simple structure and a reasonable design, and realizes the braking of the trailer by controlling the power supply of the air source, has a better braking effect, and saves time and effort.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, a service brake oil source inlet is provided in the middle of one end of the valve 2 and is communicated with the internal valve cavity thereof, and the service brake oil source inlet is communicated with one end of the service brake oil source pipeline.

[0014] The beneficial effect of adopting the above further solution is that when the foot pedal is stepped on, the oil flows from the service brake oil source pipeline through the service brake oil source inlet and pushes the valve core of valve 2 to move to the right, thereby realizing the change of the valve core.

[0015] Furthermore, both ends of the valve 2 are respectively provided with a preload port and a pneumatic handbrake port connected to its internal valve cavity. The preload port is connected to one end of the preload pipeline, and the pneumatic handbrake port is connected to one end of the pneumatic handbrake pipeline.

[0016] The beneficial effect of adopting the above further solution is that during the operation, the structure is simple and the design is reasonable. The preload port and the pneumatic handbrake port can be used to change the position of the second valve core of the valve and preload can be performed in advance.

[0017] Furthermore, the interface three is connected to one end of the control pipeline, and the other end of the control pipeline is used to connect to the trailer; the control pipeline is connected to the interface on the valve two that is connected to the valve core cavity through the pipeline.

[0018] The beneficial effects of adopting the above further solution are simple structure and reasonable design. Interface three uses the control pipeline to take in air to achieve trailer braking. In addition, the control pipeline is connected to the interface on valve two that is connected to the valve core cavity through the pipeline, so that the movement of the valve core can be controlled.

[0019] Furthermore, the second interface is connected to one end of the air supply pipeline, and the other end of the air supply pipeline is used to connect to the trailer.

[0020] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and utilizing the air supply pipeline to supply air to brake the trailer.

[0021] Furthermore, the interface four is connected to one end of the exhaust pipe.

[0022] The beneficial effects of adopting the above further solution are simple structure and reasonable design. When the foot brake is released, the valve core in the second valve is reset, and the gas in the second valve is discharged through the exhaust pipe.

[0023] Furthermore, the valve 1 is a three-position two-way valve.

[0024] The beneficial effect of adopting the above further solution is that it is more reasonable to use a three-position two-way valve as valve one, which has a simple structure, flexible control and diverse functions.

[0025] Furthermore, a throttle valve is fixedly installed on two valve core pipelines of the valve 1, and the opening degrees of the two throttle valves are different.

[0026] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the use of the throttle valve to control the air intake of valve 1, thereby ensuring the braking effect of the trailer.

[0027] Furthermore, the other end of the valve is provided with an external air cut-off port communicating with the internal valve cavity thereof, and the external air cut-off port is communicated with one end of an external control pipeline.

[0028] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the use of gas introduced through an external control pipeline to push the valve core of valve one to move until valve one is disconnected.

[0029] The utility model also relates to a tractor, comprising the pneumatic handbrake externally controlled air cut-off trailer control valve as described above.

[0030] The beneficial effect of adopting the above-mentioned further solution is that the utility model also provides a tractor with a simple structure and reasonable design. The tractor can brake the trailer by controlling the power supply of the air source, which has a good braking effect and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the present utility model.

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 1. Air source pipeline; 2. Air intake pipeline; 3. Exhaust pipeline; 4. Valve 1; 5. Valve 2; 6. Throttle valve; 21. Air supply pipeline; 22. Control pipeline; 41. Service brake oil source pipeline; 42. Preload pipeline; 43. Pneumatic handbrake pipeline; 45. External control pipeline. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment provides a pneumatic handbrake externally controlled air cut-off trailer control valve, including valve 1 4 and valve 2 5. Valve 1 4 is provided with an air inlet and an air outlet, and the air inlet is connected to the air outlet; the air inlet is connected to one end of the air source pipeline 1, and the air source pipeline 1 is connected to the spring interface at one end of valve 1 4 through the pipeline;

[0040] The valve 2 5 is provided with interface 1, interface 2, interface 3 and interface 4. The interface 1 is connected with the air outlet through the air inlet pipe 2, and the interface on the other end of the valve 1 4 is connected with the air inlet pipe 2 through a pipeline; the interface 1 is connected with the interface 2, and the interface 3 is connected with the interface 4 or the interface 1.

[0041] During operation, when the foot pedal is stepped on, the air path enters the air inlet, air outlet, interface 1 and interface 2, and interface 3 is connected to the air source to achieve trailer braking;

[0042] When the foot pedal is released, the valve core of valve 2 5 is reset and exhaust is carried out through port 4;

[0043] When parking, pull the handbrake, and the air path enters the air inlet, air outlet, interface 1 and interface 3. Interface 3 is connected to the air source to achieve trailer braking.

[0044] This embodiment has a simple structure and a reasonable design. The braking of the trailer is achieved by controlling the power supply of the air source, which has a good braking effect and saves time and effort.

[0045] Example 2

[0046] Based on Example 1, in this embodiment, a service brake oil source inlet is provided at the middle of one end of the valve 2 5 , which is connected to its internal valve cavity, and the service brake oil source inlet is connected to one end of the service brake oil source pipeline 41 .

[0047] When the foot pedal is stepped on, oil flows in from the service brake oil source pipeline 41 through the service brake oil source inlet, and pushes the valve core of valve 2 5 to move to the right, realizing the change of the valve core.

[0048] It should be noted that the tractor's brakes are divided into left brakes and right brakes, and the oil source of the service brake oil source pipeline 41 is the maximum value of the left brake and the right brake.

[0049] Example 3

[0050] Based on Example 2, in this embodiment, the two ends of the valve 2 5 are respectively provided with a preloading port and a pneumatic handbrake port connected to its internal valve cavity, the preloading port is connected to one end of the preloading pipeline 42, and the pneumatic handbrake port is connected to one end of the pneumatic handbrake pipeline 43.

[0051] During the operation, the structure is simple and the design is reasonable. The preload port and the pneumatic hand brake port can be used to change the valve core position of valve 2 5 and preload in advance.

[0052] Example 4

[0053] Based on Example 3, in this embodiment, the interface three is connected to one end of the control line 22, and the other end of the control line 22 is used to connect to the trailer; the control line 22 is connected to the interface on the valve two 5 that is connected to the valve core cavity through the pipeline.

[0054] This solution has a simple structure and a reasonable design. Interface three uses the control line 22 for air intake to achieve trailer braking. In addition, the control line 22 is connected to the interface on valve two 5 that is connected to the valve core cavity through the pipeline, which can control the movement of the valve core.

[0055] Example 5

[0056] On the basis of the above embodiments, in this embodiment, the second interface is connected to one end of the air supply pipeline 21, and the other end of the air supply pipeline 21 is used to connect to the trailer.

[0057] This solution has a simple structure and a reasonable design, and utilizes the air supply line 21 to supply air to brake the trailer.

[0058] Example 6

[0059] On the basis of the above embodiments, in this embodiment, the interface 4 is connected to one end of the exhaust pipe 3.

[0060] This solution has a simple structure and a reasonable design. When the foot brake is released, the valve core in the valve 2 5 is reset, and the gas in the valve 2 5 is discharged through the exhaust pipe 3.

[0061] Example 7

[0062] On the basis of the above embodiments, in this embodiment, the valve 1 4 is a three-position two-way valve.

[0063] It is more reasonable to use a three-position two-way valve for valve 1-4. The three-position two-way valve has a simple structure, flexible control and diverse functions.

[0064] Example 8

[0065] On the basis of Example 7, in this embodiment, a throttle valve 6 is fixedly installed on two valve core pipelines of the valve 1 4, and the opening degrees of the two throttle valves 6 are different.

[0066] This solution has a simple structure and a reasonable design. It uses the throttle valve 6 to control the air intake of the valve 1 4, thereby ensuring the braking effect of the trailer.

[0067] Example 9

[0068] On the basis of the above embodiments, in this embodiment, the other end of the valve 4 is further provided with an external air cut-off port communicating with its internal valve cavity, and the external air cut-off port is communicated with one end of the external control pipeline 45.

[0069] This solution has a simple structure and a reasonable design. It uses an external control pipeline 45 to introduce gas to push the valve core of valve 1 4 to move until valve 1 4 is disconnected.

[0070] Example 10

[0071] On the basis of the above embodiments, this embodiment further provides a tractor, comprising the pneumatic handbrake externally controlled air cut-off trailer control valve as described above.

[0072] This embodiment also provides a tractor with a simple structure and reasonable design. The tractor can brake the trailer by controlling the power supply of the air source, thereby achieving a good braking effect and saving time and effort.

[0073] The working principle of this utility model is as follows:

[0074] When driving, the air inlet, air outlet, interface 1 and interface 2 are always connected;

[0075] When the foot pedal is depressed, the air path enters the air inlet, air outlet, interface 1 and interface 2, and interface 3 is connected to the air source, realizing trailer braking; at the same time, the air source from the external air shut-off port pushes the valve core of valve 1 4 to the right, reducing the air intake of the air inlet;

[0076] When the foot pedal is released, the valve core of valve 2 is reset and exhaust is carried out through port 4;

[0077] When parking, pull the handbrake and the pneumatic handbrake pipeline is disconnected. At this time, the air path enters the air inlet, the air outlet, the interface 1 and the interface 3. The interface 3 is connected to the air source to realize the trailer braking.

[0078] It should be noted that all electronic components involved in the present invention adopt existing technologies, and the above components are electrically connected to the controller, and the control circuits between the controller and the components are existing technologies.

[0079] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0080] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic handbrake externally controlled air cut-off trailer control valve, characterized by: It comprises valve one (4) and valve two (5), wherein the valve one (4) is provided with an air inlet and an air outlet, wherein the air inlet is connected to the air outlet; the air inlet is connected to one end of an air source pipeline (1), and the air source pipeline (1) is connected to a spring interface at one end of the valve one (4) through the pipeline; The valve 2 (5) is provided with interface 1, interface 2, interface 3 and interface 4, the interface 1 is connected to the air outlet through the air inlet pipeline (2), and the interface on the other end of the valve 1 (4) is connected to the air inlet pipeline (2) through a pipeline; the interface 1 is connected to the interface 2, and the interface 3 is connected to the interface 4 or the interface 1.

2. The pneumatic handbrake externally controlled air cut-off trailer control valve according to claim 1 is characterized in that: A service brake oil source inlet is provided at the middle of one end of the valve 2 (5) and is communicated with the valve cavity inside the valve 2 (5). The service brake oil source inlet is communicated with one end of the service brake oil source pipeline (41).

3. The pneumatic handbrake externally controlled air cut-off trailer control valve according to claim 2, characterized in that: The two ends of the valve 2 (5) are also provided with a preload port and a pneumatic handbrake port respectively connected to the internal valve cavity thereof, the preload port is connected to one end of the preload pipeline (42), and the pneumatic handbrake port is connected to one end of the pneumatic handbrake pipeline (43).

4. The pneumatic handbrake externally controlled air cut-off trailer control valve according to claim 3 is characterized in that: The interface three is connected to one end of the control pipeline (22), and the other end of the control pipeline (22) is used to connect to the trailer; the control pipeline (22) is connected to the interface on the valve two (5) that is connected to the valve core cavity through the pipeline.

5. The pneumatic handbrake externally controlled air cut-off trailer control valve according to any one of claims 1 to 4, characterized in that: The second interface is connected to one end of the air supply pipeline (21), and the other end of the air supply pipeline (21) is used to connect to the trailer.

6. The pneumatic handbrake externally controlled air cut-off trailer control valve according to any one of claims 1 to 4, characterized in that: The interface 4 is communicated with one end of the exhaust pipe (3).

7. The pneumatic handbrake externally controlled air cut-off trailer control valve according to any one of claims 1 to 4, characterized in that: The valve one (4) is a three-position two-way valve.

8. The pneumatic handbrake externally controlled air cut-off trailer control valve according to claim 7, characterized in that: A throttle valve (6) is fixedly installed on two valve core pipelines of the valve 1 (4), and the opening degrees of the two throttle valves (6) are different.

9. The pneumatic handbrake externally controlled air cut-off trailer control valve according to any one of claims 1 to 4, characterized in that: The other end of the valve 1 (4) is also provided with an external air cut-off port communicating with the internal valve cavity thereof, and the external air cut-off port is communicated with one end of the external control pipeline (45).

10. A tractor, characterized in that: It comprises the pneumatic handbrake externally controlled air cut-off trailer control valve as described in any one of claims 1 to 9.

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