Single-pipeline hydraulic braking system and tractor

Abstract

The utility model relates to a single-pipeline hydraulic brake system and tractor, the hydraulic brake system includes tractor brake valve, brake valve group, brake cylinder and accumulator, the brake valve group is equipped with oil inlet P, oil return port T, energy storage oil port and oil outlet, oil inlet P is communicated with oil port 1 on tractor brake valve through oil supply pipeline, and oil return port T is communicated with oil port 2 on tractor brake valve through oil supply pipeline. The oil return port T is communicated with an oil port II in the tractor brake valve through an oil return pipeline; the oil inlet P can be communicated with the oil outlet and the energy storage oil port, and the oil return port T can be communicated with the oil outlet and the energy storage oil port; and the oil outlet is communicated with the brake cylinder through a pipeline. The utility model has the beneficial effects that the structure is simple, the design is reasonable, the coordination brake control of the whole machine is realized through the combination of the tractor main body and the trailer, and the real-time operation of the vehicle is facilitated and the cost is effectively reduced by adopting an emergency control mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor technical field, concretely relates to a single pipeline hydraulic braking system and tractor. BACKGROUND

[0002] With the vigorous development of tractor in international market, its application field also gradually expands. Among them, the configuration trailer is very common. The international general trailer is divided into two kinds of air brake and hydraulic brake, and has different adaptation regions. The hydraulic brake is higher in technical development difficulty, and has less matched elements. In order to faster adapt to the demand of international market competition, a brand new single pipeline brake design scheme is provided. UTILITY MODEL CONTENTS

[0003] The utility model provides a single pipeline hydraulic braking system and tractor, aims at solving the problem in prior art.

[0004] The utility model solves the technical problem that the utility model discloses a single pipeline hydraulic braking system and tractor.

[0005] A single pipeline hydraulic braking system, including tractor brake valve, brake valve group, brake cylinder and energy accumulator, the brake valve group is equipped with oil inlet P, oil return port T, energy storage oil port and oil outlet, the oil inlet P is communicated with the oil port one on the tractor brake valve through oil supply pipeline, the oil return port T is communicated with the oil port two on the tractor brake valve through oil return pipeline.

[0006] The oil inlet P can be communicated with the oil outlet and the energy storage oil port, and the oil return port T can be communicated with the oil outlet and the energy storage oil port, and the oil outlet is communicated with the brake cylinder through a pipeline.

[0007] The utility model has the advantages of simple structure and reasonable design, and realizes the coordinated brake control of the whole machine by combining the tractor main body and the trailer, and realizes the real-time operation of the vehicle by adopting the emergency control mode, so that the cost is effectively reduced.

[0008] The utility model has the advantages of simple structure and reasonable design, and realizes the coordinated brake control of the whole machine by combining the tractor main body and the trailer, and realizes the real-time operation of the vehicle by adopting the emergency control mode, so that the cost is effectively reduced.

[0009] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0010] Further, the brake valve group includes a reversing valve and a check valve, the reversing valve is provided with interface one, interface two and interface three, the interface two can be communicated with the interface one or the interface three, and the interface two is communicated with the brake cylinder through a pipeline.

[0011] The interface one is communicated with the oil inlet P through a pipeline one, the interface three is communicated with the accumulator through a pipeline two, and one end of the oil return pipeline is communicated with the pipeline two through a pipeline four; the pipeline one is communicated with the pipeline two through a pipeline three, and the one-way valve is fixedly installed on the pipeline three.

[0012] The beneficial effect of the above further scheme is that the reversing valve and the one-way valve jointly act to ensure normal operation of the brake cylinder during operation.

[0013] Further, the pipeline four is fixedly installed with a manual valve.

[0014] The beneficial effect of the above further scheme is that when the parking brake needs to be released, the pressure of the accumulator can be released by opening the manual valve in the brake valve group.

[0015] Further, the reversing valve is a two-position three-way valve.

[0016] The beneficial effect of the above further scheme is that the two-position three-way valve is flexible in control, easy to operate, and widely applicable.

[0017] Further, the reversing valve is an electromagnetic valve.

[0018] The beneficial effect of the above further scheme is that the electromagnetic valve has the advantages of high sensitivity, fast response, strong controllability, strong adaptability, low energy consumption, high reliability, safety in use, simple structure, and convenient installation and maintenance.

[0019] Further, the brake cylinder comprises at least one oil cylinder, and the rodless cavity of each oil cylinder is communicated with the oil outlet through a pipeline.

[0020] The beneficial effect of the above further scheme is that the tractor brake valve and the brake valve group provide oil for the oil cylinder during operation, facilitating operation of the oil cylinder.

[0021] Further, the brake cylinder comprises a plurality of oil cylinders, and the plurality of oil cylinders are distributed in parallel.

[0022] The beneficial effect of the above further scheme is that the structure is simple and reasonable in design, the number of the above oil cylinders is reasonably set, and normal operation is ensured.

[0023] Further, the number of the oil cylinders is four, the four oil cylinders are divided into two groups, the rodless cavities of the two oil cylinders in each group are communicated through an oil line one respectively; two oil lines one are communicated through an oil line two, and the oil outlet is communicated with the oil line two through a pipeline.

[0024] The beneficial effect of the further scheme is simple structure and reasonable design, and the number of the oil cylinders is reasonable to ensure normal operation.

[0025] Further, a pressure gauge is fixedly installed on a pipeline in communication between the oil outlet and the brake cylinder.

[0026] The beneficial effect of the further scheme is simple structure and reasonable design, and the pressure in the pipeline is monitored by the pressure gauge.

[0027] The utility model also relates to a tractor which comprises the single-pipeline hydraulic brake system.

[0028] The beneficial effect of the further scheme is that the utility model also provides a tractor which has simple structure and reasonable design, realizes coordinated brake control of the whole machine by combining the tractor main body and the trailer, and realizes real-time operation of the vehicle by adopting the emergency control mode, thereby effectively reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the principle diagram of the utility model;

[0030] Figure 2 It is the principle diagram of the utility model accumulator liquid filling and parking brake state;

[0031] Figure 3 It is the principle diagram of the utility model trailer running brake state;

[0032] Figure 4 It is the principle diagram of the utility model emergency manual brake release state.

[0033] In the drawings, the components represented by each reference numeral are listed as follows:

[0034] 1, tractor brake valve; 2, brake valve group; 2.1, manual valve; 2.2, reversing valve; 2.3, check valve; 3, accumulator; 4, oil cylinder; 5, pressure gauge. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] like Figures 1 to 4 As shown, this embodiment provides a single-line hydraulic braking system, including a tractor brake valve 1, a brake valve assembly 2, a brake cylinder, and an accumulator 3. The brake valve assembly 2 is provided with an oil inlet P, an oil return port T, an accumulator port, and an oil outlet. The oil inlet P is connected to port one on the tractor brake valve 1 through an oil supply pipeline, and the oil return port T is connected to port two on the tractor brake valve 1 through a return pipeline.

[0041] The oil inlet P can be connected to the oil outlet and the accumulator oil port, and the oil return port T can be connected to the oil outlet and the accumulator oil port; the oil outlet is connected to the brake cylinder through a pipeline.

[0042] During operation, the tractor brake valve 1 and brake valve group 2 are used to supply oil to the brake cylinder; at the same time, the accumulator 3 is used to store energy.

[0043] It should be noted that the aforementioned tractor brake valve 1 uses existing technology, and its specific structure and principle will not be described in detail here.

[0044] The embodiment has simple structure and reasonable design, realizes coordinated braking control of the whole machine by combining the tractor main body and the trailer, and facilitates real-time operation of the vehicle by adopting the emergency control mode, and effectively reduces the cost.

[0045] Embodiment 2

[0046] In the embodiment, on the basis of embodiment 1, the brake valve group 2 comprises a reversing valve 2.3 and a check valve 2.2, the reversing valve 2.3 is provided with an interface one, an interface two and an interface three, the interface two can be communicated with the interface one or the interface three, the interface two is communicated with the brake cylinder through a pipeline;

[0047] The interface one is communicated with the oil inlet P through a pipeline one, the interface three is communicated with the accumulator 3 through a pipeline two, one end of the oil return pipeline is communicated with the pipeline two through a pipeline four, the pipeline one is communicated with the pipeline two through a pipeline three, and the check valve 2.2 is fixedly installed on the pipeline three.

[0048] During operation, the reversing valve 2.3 and the check valve 2.2 jointly act to ensure normal operation of the brake cylinder.

[0049] It should be noted that the reversing valve 2.3 and the check valve 2.2 are respectively existing technologies, and the specific structure and principle thereof will not be described herein.

[0050] Embodiment 3

[0051] In the embodiment, on the basis of embodiment 2, a manual valve 2.1 is fixedly installed on the pipeline four.

[0052] After parking brake, when it is needed to release the parking brake, the pressure of the accumulator 3 can be released by opening the manual valve 2.1 in the brake valve group 2.

[0053] It should be noted that the manual valve 2.1 is an existing technology, and the specific structure and principle thereof will not be described herein.

[0054] Embodiment 4

[0055] In the embodiment, on the basis of any one of embodiments 2 to 3, the reversing valve 2.3 is a two-position three-way valve.

[0056] The reversing valve 2.3 is a two-position three-way valve, which is flexible in control and simple in operation, and has wide application range.

[0057] Embodiment 5

[0058] In the embodiment, on the basis of any one of embodiments 2 to 4, the reversing valve 2.3 is an electromagnetic valve.

[0059] The advantage of the reversing valve 2.3 using the electromagnetic valve is high sensitivity, fast response, strong controllability, strong adaptability, low energy consumption, high reliability, safe use, simple structure, convenient installation and maintenance, etc.

[0060] Embodiment 6

[0061] On the basis of the above-mentioned embodiments, in the present embodiment, the brake cylinder comprises at least one oil cylinder 4, and the rodless cavity of each oil cylinder 4 is communicated with the oil outlet through a pipeline.

[0062] During operation, the oil cylinder 4 is supplied with oil by the tractor brake valve 1 and the brake valve group 2, facilitating the operation of the oil cylinder 4.

[0063] It should be noted that the above-mentioned oil cylinder 4 uses the prior art, and its specific structure and principle will not be described here.

[0064] Embodiment 7

[0065] On the basis of embodiment 6, in the present embodiment, the brake cylinder comprises a plurality of oil cylinders 4, and the plurality of oil cylinders 4 are distributed side by side.

[0066] The scheme is simple in structure and reasonable in design, and the number of the above-mentioned oil cylinders 4 is reasonably set to ensure normal operation.

[0067] Embodiment 8

[0068] On the basis of embodiment 7, in the present embodiment, the number of the oil cylinders 4 is four, and the four oil cylinders 4 are divided into two groups, and the rodless cavities of the two oil cylinders 4 in each group are respectively communicated through an oil line one; two oil lines one are communicated through an oil line two, and the oil outlet is communicated with the oil line two through a pipeline.

[0069] The scheme is simple in structure and reasonable in design, and the number of the above-mentioned oil cylinders 4 is reasonably set to ensure normal operation.

[0070] Embodiment 9

[0071] On the basis of the above-mentioned embodiments, in the present embodiment, a pressure gauge 5 is fixedly installed on the pipeline communicated between the oil outlet and the brake cylinder.

[0072] The scheme is simple in structure and reasonable in design, and the pressure in the pipeline is monitored by using the pressure gauge 5.

[0073] Embodiment 10

[0074] On the basis of the above-mentioned embodiments, the present embodiment further provides a tractor comprising a single-pipeline hydraulic brake system as described above.

[0075] The tractor is simple in structure, reasonable in design, realizes coordinated brake control of the whole machine by combining the tractor main body and the trailer, and facilitates real-time operation of the vehicle by adopting the emergency control mode, and cost is effectively reduced.

[0076] The working principle of the utility model is as follows:

[0077] (1) Accumulator liquid filling and parking brake state:

[0078] After the vehicle is assembled, the pipeline and the hydraulic element are all without hydraulic oil, after the tractor is started for the first time, the pressure oil is delivered to the brake valve group 2 through the tractor trailer brake valve 1. The reversing valve 2.3 in the brake valve group 2 is not electrified, the pressure oil is filled into the accumulator 3 through the one-way valve 2.2 in it, with the gradual increase of the pressure, the pressure oil overcomes the spring force of the brake cylinder, forces the brake cylinder to extend, thereby controlling the trailer to reach the brake state, i.e. the parking brake (refer to Figure 2 ).

[0079] (2) Trailer running brake state:

[0080] When the vehicle runs, the reversing valve 2.3 in the brake valve group 2 is electrified, when the tractor needs to brake, the pressure oil from the tractor brake valve 1 is directly delivered to the brake cylinder through the reversing valve 2.3 in the brake valve group 2, after overcoming the spring force in it, the brake cylinder piston rod extends, the trailer starts to brake, and the brake pressure can be observed in real time through the pressure gauge 5 (refer to Figure 3 ).

[0081] (3) Emergency manual brake release state:

[0082] When the trailer is in the parking brake state, the reversing valve 2.3 in the electromagnetic valve group 2 is not electrified, under the pressure action of the accumulator 3, the trailer is in the parking brake state. At this time, if the parking brake needs to be released, the pressure of the accumulator 3 can be discharged by opening the manual valve 2.1 in the brake valve group 2 (refer to Figure 4 ).

[0083] The advantages of the utility model are as follows:

[0084] 1. The tractor main body and the trailer are combined to realize coordinated brake control of the whole machine;

[0085] 2. The innovation control principle is adopted to promote the updating of technology;

[0086] 3. The logical control between elements is adopted to realize the function that parking is braking and running is releasing;

[0087] 4. The emergency control mode is adopted to facilitate real-time operation of the vehicle;

[0088] 5. By using mature components and processing technology, the maturity of new product development is ensured and the cost is effectively reduced.

[0089] The hydraulic braking system provided by the utility model meets the prerequisite of the EU standard, considers the application working condition of the trailer in the full time domain, simultaneously takes into account the timeliness and convenience of operation, and successfully promotes the technology of hydraulic braking to tractors of various horsepower segments.

[0090] It should be noted that each electronic component involved in the utility model adopts the prior art, and each component and the controller are electrically connected.

[0091] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model.

[0092] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0093] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A single line hydraulic brake system characterized by: The single-pipeline hydraulic brake system comprises a tractor brake valve (1), a brake valve group (2), a brake cylinder and an accumulator (3), the brake valve group (2) is provided with an oil inlet port P, an oil return port T, an accumulator oil port and an oil outlet port, the oil inlet port P is communicated with an oil port one on the tractor brake valve (1) through an oil supply pipeline, and the oil return port T is communicated with an oil port two on the tractor brake valve (1) through an oil return pipeline; The oil inlet port P can be communicated with the oil outlet port and the accumulator oil port, and the oil return port T can be communicated with the oil outlet port and the accumulator oil port; the oil outlet port is communicated with the brake cylinder through a pipeline.

2. The single line hydraulic brake system of claim 1, wherein: The brake valve group (2) comprises a reversing valve (2.3) and a check valve (2.2), the reversing valve (2.3) is provided with an interface one, an interface two and an interface three, the interface two can be communicated with the interface one or the interface three, and the interface two is communicated with the brake cylinder through a pipeline; The interface one is communicated with the oil inlet port P through a pipeline one, the interface three is communicated with the accumulator (3) through a pipeline two, and one end of the oil return pipeline is communicated with the pipeline two through a pipeline four; the pipeline one is communicated with the pipeline two through a pipeline three, and the check valve (2.2) is fixedly installed on the pipeline three.

3. The single line hydraulic brake system of claim 2, wherein: A hand valve (2.1) is fixedly installed on the pipeline four.

4. The single line hydraulic brake system of claim 2, wherein: The reversing valve (2.3) is a two-position three-way valve.

5. The single line hydraulic brake system of claim 2, wherein: The reversing valve (2.3) is an electromagnetic valve.

6. The single line hydraulic brake system according to any one of claims 1 to 5, characterized in that: The brake cylinder comprises at least one oil cylinder (4), and the rodless cavity of each oil cylinder (4) is communicated with the oil outlet port through a pipeline.

7. The single line hydraulic brake system of claim 6, wherein: The brake cylinder comprises a plurality of oil cylinders (4), and the plurality of oil cylinders (4) are distributed in parallel.

8. The single line hydraulic brake system of claim 7, wherein: The number of the oil cylinders (4) is four, and the four oil cylinders (4) are divided into two groups, and the rodless cavities of the two oil cylinders (4) in each group are communicated through an oil line one; two oil lines one are communicated through an oil line two, and the oil outlet port is communicated with the oil line two through a pipeline.

9. The single line hydraulic brake system according to any one of claims 1-5, characterized in that: A pressure gauge (5) is fixedly installed on the pipeline communicated between the oil outlet port and the brake cylinder.

10. A tractor characterised in that: The single-pipeline hydraulic brake system comprises a tractor brake valve (1), a brake valve group (2), a brake cylinder and an accumulator (3), the brake valve group (2) is provided with an oil inlet port P, an oil return port T, an accumulator oil port and an oil outlet port, the oil inlet port P is communicated with an oil port one on the tractor brake valve (1) through an oil supply pipeline, and the oil return port T is communicated with an oil port two on the tractor brake valve (1) through an oil return pipeline;

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