CN211731351U - Tractor braking system and tractor - Google Patents
Tractor braking system and tractor Download PDFInfo
- Publication number
- CN211731351U CN211731351U CN202020228009.9U CN202020228009U CN211731351U CN 211731351 U CN211731351 U CN 211731351U CN 202020228009 U CN202020228009 U CN 202020228009U CN 211731351 U CN211731351 U CN 211731351U
- Authority
- CN
- China
- Prior art keywords
- brake
- trailer
- tractor
- braking
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 5
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Landscapes
- Braking Systems And Boosters (AREA)
Abstract
The utility model discloses a tractor braking system and tractor takes tractor braking system of trailer one kind tractor braking system, including braking oilcan, two braking wheel cylinders, two brake pedals and trailer air brake mechanism, the oil-out and two of braking oilcan the oil inlet intercommunication of braking wheel cylinder, the braking wheel cylinder has two oil-outs, trailer air brake mechanism's trailer brake valve that has still includes the shuttle valve, the trailer brake valve is the pneumatic proportional valve of liquid accuse, two oil inlets of shuttle valve respectively with two the remaining oil-out intercommunication of braking wheel cylinder, the oil-out of shuttle valve with the oil inlet intercommunication of the pneumatic proportional valve of liquid accuse. So make trailer air brake mechanism of trailer and two brake wheel cylinders of trailer body pass through the shuttle valve intercommunication to pass through fluid pressure type by shuttle valve and trailer brake valve and be connected, make it arrange more conveniently, the adjustment is simple and convenient.
Description
Technical Field
The utility model belongs to the tractor field especially relates to a tractor braking system and tractor.
Background
Currently, the drag service braking systems are roughly divided into three categories: the hydraulic boosting booster brake system is used for the large-scale tractor. The specific structure and principle of the control mechanism between a manual hydraulic braking system of a main tractor of a medium-sized tractor transport unit and an air braking system of a trailer are that the control mechanism is connected by adopting mechanical connecting rods, the installation is complex, the arrangement is limited, and the control mechanism needs to be adjusted frequently, and the like, and the control mechanism is specifically shown in figure 1, the existing tractor body is provided with a braking oil can 1, two braking pedals 3 and two braking sub-pumps 2 which correspond to one of the braking sub-pumps and are in transmission connection with one of the braking sub-pumps, wherein each braking sub-pump 2 is provided with two oil outlets, one oil outlet of each braking sub-pump 2 is communicated with an oil inlet of a corresponding brake caliper 5 on the tractor body, the brake calipers 5 are used for braking a brake disc on a driving wheel, and the rest oil outlets of the two braking sub-pumps 2 are communicated through two one-way valves 9 (the two one-way valves, when two brake pedals are simultaneously stepped on, the resistance of the two brake pedals can be kept consistent when the two brake pedals are stepped on), when the brake pedals 3 are stepped on by feet, manpower is transmitted to a brake cylinder 2 of a tractor body through a lever, the lever applies acting force to a piston of the brake cylinder 2 to pressurize a cylinder and enable a brake caliper 5 to generate braking force to act on a brake disc, so that the tractor body is decelerated or braked, one brake pedal 3 simultaneously controls a trailer brake valve 81 of a trailer air brake mechanism on the tractor body through a connecting rod 10, the trailer brake valve in the prior art is a mechanical pneumatic proportional valve, the brake pedal 3 is in transmission connection with the mechanical pneumatic proportional valve through a connecting rod, the output pressure of the trailer brake valve 81 is increased according to the displacement amount corresponding to the displacement of the brake pedal 3, the output air pressure is fully opened when the mechanical pneumatic proportional valve is fully opened, slowing or braking the trailer.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the present invention is to provide a braking system with simple structure and capable of driving the pilot-controlled pneumatic proportional valve to brake through hydraulic transmission between the tractor body and the trailer.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a tractor braking system comprises a braking oil can, two brake cylinders, two brake pedals and a trailer air braking mechanism, wherein the braking oil can is arranged on a tractor body, the oil outlet of the braking oil can is communicated with the oil inlets of the two brake cylinders, the brake cylinders are provided with two oil outlets, the two brake cylinders are respectively arranged with brake calipers of two driving wheels of the tractor body and the two brake pedals in a one-to-one correspondence mode, one oil outlet of each brake cylinder is communicated with the oil inlet of the corresponding brake caliper, each brake pedal is in transmission connection with the corresponding brake cylinder, the trailer air braking mechanism is provided with a trailer braking valve and a shuttle valve, the trailer braking valve is a hydraulic control pneumatic proportional valve, and the two oil inlets of the shuttle valve are respectively communicated with the rest oil outlets of the two brake cylinders, the oil outlet of the shuttle valve is communicated with the oil inlet of the hydraulic control pneumatic proportional valve, any one of the brake pedals is treaded down to drive the corresponding brake cylinder to brake the corresponding driving wheel of the corresponding brake caliper and drive the trailer pneumatic brake mechanism to brake, or the two brake pedals are synchronously treaded down to drive the two brake cylinders to synchronously brake the brake discs on the two sides of the tractor body and drive the trailer pneumatic brake mechanism to brake.
The beneficial effects of the above technical scheme are that: so make trailer air brake mechanism of trailer and two brake wheel cylinders of trailer body pass through the shuttle valve intercommunication to no matter step on any one brake pedal or step on two brake pedals simultaneously, all can realize hydraulic drive trailer air brake mechanism braking, pass through fluid pressure type connection with trailer brake valve in addition, make it arrange more conveniently, the adjustment is simple and convenient.
The technical scheme further comprises a one-way throttle valve, wherein an oil inlet of the one-way throttle valve is communicated with an oil outlet of the shuttle valve, and an oil outlet of the one-way throttle valve is communicated with an oil inlet of the hydraulic control pneumatic proportional valve.
The beneficial effects of the above technical scheme are that: the one-way throttle valve can adjust the braking strength between the tractor body and the trailer, and can adjust the distribution of hydraulic pressure in the brake cylinder and the trailer pneumatic brake mechanism.
In the above technical scheme, the trailer air brake mechanism still includes air feed subassembly and pneumatic fast plug, the gas outlet of air feed subassembly with the air inlet intercommunication of the pneumatic proportional valve of pilot-controlled, install in the gas outlet department of the pneumatic proportional valve of pilot-controlled pneumatic fast plug.
The beneficial effects of the above technical scheme are that: the braking strength of the trailer relative to the tractor body is adjusted through the one-way throttle valve, wherein the output pressure of the pilot-controlled pneumatic proportional valve is reduced according to the increase of the pedal displacement, the output air pressure is cut off when the pilot-controlled pneumatic proportional valve is fully opened, and the braking strength of the trailer is maximum.
In the technical scheme, the gas supply assembly comprises a safety valve and a gas storage tank, a gas inlet of the hydraulic control pneumatic proportional valve is communicated with a gas outlet of the gas supply device through a pipeline, a tank opening of the gas storage tank is communicated with the pipeline, and the safety valve is further arranged on the pipeline.
Above-mentioned technical scheme's beneficial effect lies in, can carry out the gas storage through the gas holder for the braking trailer that air feeder still can brake limited time after stopping the air feed.
The beneficial effects of the above technical scheme are that: the braking strength of the trailer relative to the tractor body is adjusted through the one-way throttle valve, wherein the output pressure of the pilot-controlled pneumatic proportional valve is reduced according to the increase of the pedal displacement, the output air pressure is cut off when the pilot-controlled pneumatic proportional valve is fully opened, and the braking strength of the trailer is maximum.
In the technical scheme, the number of the gas storage tanks is two.
The beneficial effects of the above technical scheme are that: the air storage tank is arranged for storing air, so that when the air supply device stops supplying air, the air pressure stored by the air storage tank can still provide the air pressure required by braking the trailer for a plurality of times.
The safety pressure of the safety valve in the technical scheme is set to be 8 bar.
The beneficial effects of the above technical scheme are that: the operation safety of the trailer air braking mechanism is prevented from being influenced by overhigh air pressure in the pipeline.
Still include the pressure gauge among the above-mentioned technical scheme, the pressure gauge is installed on the pipeline.
The beneficial effects of the above technical scheme are that: so be convenient for in time know the pressure in the trailer air brake mechanism pipeline.
In the technical scheme, the air supply device is an air pump arranged on the tractor body.
The beneficial effects of the above technical scheme are that: therefore, the trailer braking force is taken from the engine air pump, and energy consumption is saved.
The second purpose of the utility model is to provide a tractor including as above tractor braking system.
Drawings
FIG. 1 is a schematic representation of a prior art tractor brake system;
fig. 2 is a schematic diagram of a tractor brake system according to an embodiment of the present invention after being modified based on the prior art.
In the figure: 1 braking oil can, 2 braking cylinders, 3 braking pedals, 4 air pumps, 5 braking calipers, 6 shuttle valves, 7 one-way throttle valves, 81 trailer braking valves, 82 pneumatic quick plugs, 83 safety valves, 84 air storage tanks, 85 pressure gauges, 9 one-way valves and 10 connecting rods.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 2, the embodiment provides a tractor braking system with a trailer, which includes a braking oil pot 1, two brake cylinders 2, two brake pedals 3 and a trailer air braking mechanism, which are arranged on a tractor body, an oil outlet of the braking oil pot 1 is communicated with oil inlets of the two brake cylinders 2, the brake cylinders 2 have two oil outlets, the two brake cylinders 2 are respectively arranged in one-to-one correspondence with brake calipers 5 of two driving wheels of the tractor body and the two brake pedals 3, one oil outlet of each brake cylinder 2 is communicated with an oil inlet of the corresponding brake caliper 5, each brake pedal 3 is in transmission connection with the corresponding brake cylinder 2, the trailer air braking mechanism has a trailer braking valve 81 and a shuttle valve 6, the trailer braking valve 81 is a hydraulic control pneumatic proportional valve, two oil inlets of the shuttle valve 6 are respectively communicated with the rest oil outlets of the two brake cylinders 2, an oil outlet of the shuttle valve 6 is communicated with an oil inlet of the hydraulic control pneumatic proportional valve, any one of the brake pedals 3 is treaded down to drive the corresponding brake cylinder 2 to brake the corresponding driving wheel of the corresponding brake caliper 5 and drive the trailer pneumatic brake mechanism to brake, or the two brake pedals 3 are treaded down synchronously to drive the two brake cylinders 2 to synchronously brake the brake discs 14 on two sides of the tractor body and drive the trailer pneumatic brake mechanism to brake. So make trailer air brake mechanism of trailer and two brake wheel cylinders of trailer body pass through the shuttle valve intercommunication to no matter step on any one brake pedal or step on two brake pedals simultaneously, all can realize hydraulic drive trailer air brake mechanism braking, pass through fluid pressure type connection with trailer brake valve in addition, make it arrange more conveniently, the adjustment is simple and convenient.
The technical scheme includes that the hydraulic tractor further comprises a one-way throttle valve 7, an oil inlet of the one-way throttle valve 7 is communicated with an oil outlet of the shuttle valve 6, an oil outlet of the one-way throttle valve 7 is communicated with an oil inlet of the hydraulic control pneumatic proportional valve, and the distribution of hydraulic pressure in a brake cylinder and a trailer pneumatic brake mechanism can be adjusted by setting the one-way throttle valve to submit the brake strength between the tractor body and a trailer.
In the technical scheme, the trailer air brake mechanism further comprises a pneumatic quick plug 82, a safety valve 83 and an air storage tank 84, an air inlet of the hydraulic control pneumatic proportional valve is communicated with an air outlet of the air supply device through a pipeline, a tank opening of the air storage tank 84 is communicated with the pipeline, the safety valve 83 is further arranged on the pipeline, and the pneumatic quick plug 82 is installed at the air outlet of the hydraulic control pneumatic proportional valve. The braking strength of the trailer relative to the tractor body is adjusted through the one-way throttle valve. The output pressure of the hydraulic control pneumatic proportional valve is reduced according to the increase of the pedal displacement, the output air pressure is cut off when the hydraulic control pneumatic proportional valve is completely opened, and the braking strength of the trailer is maximum at the moment. The trailer brake mechanism in this embodiment is different from the prior art in that the trailer brake valve is a pilot-operated pneumatic proportional valve, while the trailer brake valve in the prior art is a mechanical pneumatic proportional valve, which is different in that one is mechanically driven by a link and the other is hydraulically driven.
In the above technical solution, the two gas storage tanks 24 are provided, and are configured to store gas, so that when the gas supply device stops supplying gas, a solvent of each gas storage tank can be set to 10L, that is, the two gas storage tanks can store 20L of compressed gas, and after the gas supply device stops, the gas storage tanks can still provide compressed gas for 4-5 times of braking for the trailer.
In the technical scheme, the safety pressure of the safety valve 83 is set to be 8bar, so that the operation safety of the trailer air braking mechanism is prevented from being influenced by overhigh air pressure in the pipeline.
Still include pressure gauge 85 among the above-mentioned technical scheme, pressure gauge 85 is installed on the pipeline, so be convenient for in time know the pressure in the trailer air brake mechanism pipeline.
In the technical scheme, the air supply device is the air pump 4 arranged on the tractor body, so that the trailer braking force is taken from an engine air pump, and the energy consumption is saved, wherein the specification of the air pump of the tractor body can be 8-10bar of output air pressure, and the ventilation volume is 210L/min.
After the improvement, the control signal of the trailer air braking mechanism is taken from the output of the brake pedal, so that the braking of the tractor body and the trailer braking are coordinated; the improved hydraulic control pneumatic proportional valve is a normally open hydraulic control pneumatic proportional valve, so that hydraulic control pneumatic proportional braking can be realized, and the braking force of air-cut braking is larger and more reliable; in addition, the brake mechanism of the tractor body is hydraulically connected with the trailer air brake mechanism, so that the defect of mechanically connecting the original trailer air brake mechanism is overcome, and the structural arrangement is simpler and more convenient through pipeline connection; the trailer is braked more stably and safely by air-cut braking; the braking strength of the trailer is correspondingly adjusted by adjusting the one-way throttle valve, so that the driving experience is more comfortable and stable.
Example 2
The present embodiment provides a tractor including a tractor brake system as described in embodiment 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A tractor braking system comprises a braking oil can (1), two brake cylinders (2), two brake pedals (3) and a trailer air braking mechanism, wherein the braking oil can (1), the two brake cylinders (2) and the trailer air braking mechanism are arranged on a tractor body, oil outlets of the braking oil can (1) are communicated with oil inlets of the two brake cylinders (2), the two brake cylinders (2) are respectively arranged in a one-to-one correspondence manner with brake calipers (5) of two driving wheels of the tractor body and the two brake pedals (3), one oil outlet of each brake cylinder (2) is communicated with an oil inlet of the corresponding brake caliper (5), each brake pedal (3) is in transmission connection with the corresponding brake cylinder (2), the trailer air braking mechanism is provided with a trailer braking valve (81), and the tractor braking system is characterized by further comprising a shuttle valve (6), the trailer brake valve (81) is a hydraulic control pneumatic proportional valve, two oil inlets of the shuttle valve (6) are respectively communicated with the rest oil outlets of the two brake cylinders (2), an oil outlet of the shuttle valve (6) is communicated with an oil inlet of the hydraulic control pneumatic proportional valve, any one of the brake pedals (3) is treaded down to drive the corresponding brake cylinder (2) to brake the corresponding brake caliper (5) to brake the corresponding driving wheel and drive the trailer pneumatic brake mechanism to brake, or the two brake pedals (3) are treaded down synchronously to drive the two brake cylinders (2) to synchronously brake the brake discs (14) on the two sides of the tractor body and drive the trailer pneumatic brake mechanism to brake.
2. The tractor brake system according to claim 1, characterized by further comprising a one-way throttle valve (7), wherein an oil inlet of the one-way throttle valve (7) is communicated with an oil outlet of the shuttle valve (6), and an oil outlet of the one-way throttle valve (7) is communicated with an oil inlet of the pilot-controlled pneumatic proportional valve.
3. The tractor braking system according to claim 1 or 2, characterized in that the trailer air brake mechanism further comprises an air supply assembly and a pneumatic quick plug (82), an air outlet of the air supply assembly is communicated with an air inlet of the pilot operated pneumatic proportional valve, and the pneumatic quick plug (82) is installed at an air outlet of the pilot operated pneumatic proportional valve.
4. The tractor brake system according to claim 3, characterized in that the air supply assembly comprises a relief valve (83) and an air storage tank (84), an air inlet of the pilot operated pneumatic proportional valve is communicated with an air outlet of the air supply device through a pipeline, a tank opening of the air storage tank (84) is communicated with the pipeline, and the relief valve (83) is further arranged on the pipeline.
5. The tractor brake system according to claim 4, wherein there are two of the air tanks (84).
6. The tractor brake system according to claim 4, characterized in that the relief pressure of the relief valve (83) is set to 8 bar.
7. The tractor brake system of claim 4, further comprising a pressure gauge (85), the pressure gauge (85) being mounted on the conduit.
8. The tractor brake system according to claim 4, characterized in that the air supply means is an air pump (4) carried on the tractor body itself.
9. A tractor comprising a tractor brake system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228009.9U CN211731351U (en) | 2020-02-28 | 2020-02-28 | Tractor braking system and tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228009.9U CN211731351U (en) | 2020-02-28 | 2020-02-28 | Tractor braking system and tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211731351U true CN211731351U (en) | 2020-10-23 |
Family
ID=72877004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020228009.9U Active CN211731351U (en) | 2020-02-28 | 2020-02-28 | Tractor braking system and tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211731351U (en) |
-
2020
- 2020-02-28 CN CN202020228009.9U patent/CN211731351U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8651588B2 (en) | Electro-pneumatic brake control device | |
| US8240777B2 (en) | Device for controlling hydraulic braking of a trailer hitched to a tractor | |
| CN107415917A (en) | A kind of EHB of integrated electronic parking braking | |
| CN109305151B (en) | Redundant EPB auxiliary control's drive-by-wire hydraulic braking system | |
| CN104442777A (en) | Chassis wheel edge distributed independent brake actuating mechanism and chassis brake system | |
| CN201143928Y (en) | Light cargo vehicle brake fluid system with load proportional valve | |
| CN104192121A (en) | Trailer control valve | |
| CN104192120A (en) | Control method of trailer control valve | |
| CN108216174A (en) | A kind of dual active boost braking system of redundance type | |
| CN102050098B (en) | Hydraulic dynamic brake operating system for tractor | |
| CN211731351U (en) | Tractor braking system and tractor | |
| CN204309768U (en) | Chassis wheel edge distributed independent brake actuating mechanism and chassis brake system | |
| CN101380947B (en) | Auxiliary brake for commercial vehicles | |
| CN213649540U (en) | ABS braking system of tunnel tractor | |
| CN112512884B (en) | A braking system for vehicle braking and an autonomous vehicle | |
| CN102501841B (en) | For actuation unit and the method for operation thereof of hydraulic brake system | |
| US3415576A (en) | Braking systems of articulated vehicles | |
| CN201217435Y (en) | Control-by-wire brake system for towing vehicle | |
| CN207510406U (en) | A kind of electronic hydraulic brake system of integrated electronic parking braking | |
| CN212605061U (en) | Hydraulic brake system | |
| CN105035051B (en) | A kind of hydraulic auxiliary brake system | |
| CN105235665B (en) | Full-hydraulic double-loop dynamic braking system | |
| CN102358276A (en) | Integrated antilock brake system (ABS) regulator, vehicle air brake system and vehicle | |
| CN201932145U (en) | Hydraulic power brake control system for tractor | |
| CN202130440U (en) | Integrated ABS (antilock brake system) adjuster, automobile air-pressure brake system and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai leiwo Heavy Industry Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: LOVOL HEAVY INDUSTRY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |