CN218986603U - Hydraulic service braking system of three-axis mining dump truck - Google Patents
Hydraulic service braking system of three-axis mining dump truck Download PDFInfo
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- CN218986603U CN218986603U CN202223314738.4U CN202223314738U CN218986603U CN 218986603 U CN218986603 U CN 218986603U CN 202223314738 U CN202223314738 U CN 202223314738U CN 218986603 U CN218986603 U CN 218986603U
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Abstract
The utility model discloses a hydraulic service brake system of a three-axis mining dump truck, which comprises a brake valve, wherein the brake valve is used for controlling a brake on three axes to work, the brake valve is connected with a charging valve, and the charging valve is used for supplying pressure oil output by a hydraulic pump to the brake valve and a relay valve. According to the hydraulic control system, the hydraulic oil output by the hydraulic pump is supplied to the brake valve and the first relay valve, the second relay valve and the third relay valve through the liquid filling valve, when braking action is required to be executed, the brake pedal on the valve body is stepped down, under the action of the tappet, the output pressures of the first hydraulic component, the second hydraulic component and the third hydraulic component on the valve body are respectively controlled by the pilot to output braking pressures to the front axle service brake, the middle axle service brake and the rear axle service brake in proportion, so that braking is realized, rapid braking and oil return are realized, abrasion of tires is reduced, and the problems of braking delay and untimely oil return caused by overlong pipelines are solved.
Description
Technical Field
The utility model relates to the technical field of mining dumpers, in particular to a hydraulic service braking system of a three-axis mining dumper.
Background
The mine dumper belongs to an off-highway dumper, and is used for transporting coal mines and sand and stones in off-highway field sites such as large open-pit mines and hydraulic engineering. The mining dump truck is a main transport tool for development and production of strip mines due to the advantages of good maneuverability, high turnover speed, large load carrying capacity and the like. Mining dump trucks work environment is abominable, and road conditions are relatively poor, face down long-slope dangerous operating conditions often, so reliable, stable braking system design is crucial to driving safety.
An electric brake system of an electric wheel mining dump truck with a publication number of CN102350987B is characterized in that an electronic pedal is connected with the input end of a valve driver, a front axle electro-hydraulic proportional brake valve and a rear axle electro-hydraulic proportional brake valve are respectively connected with the output end of the valve driver, the front axle electro-hydraulic proportional brake valve is connected with a front axle service brake, the rear axle electro-hydraulic proportional brake valve is connected with a rear axle service brake, and the front axle electro-hydraulic proportional brake valve is connected with an oil tank through a front axle brake holding valve body; the rear axle electro-hydraulic proportional brake valve is connected with the oil tank through a rear axle brake holding valve body, and the front axle brake holding valve body and the rear axle brake holding valve body are connected with a steering hydraulic system. The intelligent brake control device has the advantages of flexible control, convenient operation, high reliability, easier fault diagnosis and sensitive brake.
However, the conventional mining dump truck generally adopts pneumatic braking, the pneumatic braking has the problems of slow braking response and easiness in mixing in water vapor to affect the braking effect, and some mining dump trucks adopt full-hydraulic braking systems, but generally adopt a two-way braking valve as a control valve to control brakes on three shafts, one way controls a front axle brake, the other way simultaneously controls a middle axle and a rear axle brake, and the middle axle and the rear axle have the problems of braking on one shaft and high tire wear because of pipeline lengths.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a hydraulic service brake system of a three-axis mining dump truck, which comprises a brake valve, wherein the brake valve is used for controlling a brake on three axes to work, the brake valve is connected with a charging valve, the charging valve is used for supplying pressure oil output by a hydraulic pump to the brake valve and a relay valve, and the brake comprises:
the front axle service brake is connected with the brake valve and used for controlling the front axle, and is connected with the first relay valve which is connected with the front axle service accumulator;
the intermediate bridge service brake is connected with the brake valve and used for controlling the intermediate bridge, and is connected with the second relay valve which is connected with the intermediate bridge service energy accumulator;
the rear axle service brake is connected with the brake valve and used for controlling the rear axle, the rear axle service brake is connected with the third relay valve, and the rear axle is connected with the rear axle service accumulator.
As a further description of the above technical solution: the brake valve comprises a valve body, a brake pedal is arranged on the valve body, a tappet is arranged between the valve body and the brake pedal, and a hydraulic assembly is arranged on the valve body.
As a further description of the above technical solution: the hydraulic assembly comprises a first hydraulic assembly, a second hydraulic assembly and a third hydraulic assembly, and the first hydraulic assembly, the second hydraulic assembly and the third hydraulic assembly are vertically arranged on the valve body.
As a further description of the above technical solution: the first hydraulic assembly, the second hydraulic assembly and the third hydraulic assembly are all connected with the energy accumulator.
As a further description of the above technical solution: and an accumulator low-voltage alarm switch is arranged among the front axle driving accumulator, the middle axle driving accumulator, the bridge driving accumulator and the liquid filling valve.
As a further description of the above technical solution: and the front axle service brake, the middle axle service brake and the middle axle service brake are all connected with brake pressure gauges.
As a further description of the above technical solution: the brake pressure gauge is provided with three.
As a further description of the above technical solution: one side of the brake valve is connected with a brake tail lamp switch, and the brake tail lamp switch is used for outputting an electric signal to control a brake lamp.
As a further description of the above technical solution: and one-way valves are arranged among the front axle driving energy accumulator, the middle axle driving energy accumulator, the bridge driving energy accumulator and the liquid filling valve.
As a further description of the above technical solution: the one-way valves are provided with three.
The technical scheme has the following advantages or beneficial effects:
1. according to the hydraulic control system, the hydraulic oil output by the hydraulic pump is supplied to the brake valve and the first relay valve, the second relay valve and the third relay valve through the liquid filling valve, when braking action is required to be executed, the brake pedal on the valve body is stepped down, under the action of the tappet, the output pressures of the first hydraulic component, the second hydraulic component and the third hydraulic component on the valve body are respectively controlled by the pilot to output braking pressures to the front axle service brake, the middle axle service brake and the rear axle service brake in proportion, so that braking is realized, rapid braking and oil return are realized, abrasion of tires is reduced, and the problems of braking delay and untimely oil return caused by overlong pipelines are solved.
2. The utility model can store energy for the braking system through the front axle driving energy accumulator, the middle axle driving energy accumulator and the rear axle driving energy accumulator, ensures that the driving braking pressure source is stable in the driving process of the vehicle, ensures that the vehicle brakes normally, and ensures that the driving braking has 3-5 times of braking capability in the state that the pressure source fails or stops.
3. According to the utility model, the one-way valve is arranged between the accumulator and the charging valve, so that the oil backflow of the accumulator can be prevented, and each accumulator is ensured to ensure the braking capability after the charging is completed.
Drawings
FIG. 1 is a schematic diagram of a service hydraulic brake system of a three-axis mining dump truck according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a brake valve according to an embodiment of the utility model.
Legend description:
1. a brake valve; 2. a charging valve; 3. front axle service brake; 4. a mid-bridge service brake; 5. rear axle service brake; 6. a first relay valve; 7. front axle driving accumulator; 8. a second relay valve; 9. a middle bridge driving energy accumulator; 10. a third relay valve; 11. rear axle driving energy accumulator; 12. an accumulator low-voltage alarm switch; 13. a brake pressure gauge; 14. a brake tail light switch; 15. a one-way valve; 101. a valve body; 102. a brake pedal; 103. a tappet; 104. a first hydraulic assembly; 105. a second hydraulic assembly; 106. and a third hydraulic assembly.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
as shown in fig. 1-2, the hydraulic service brake system of the three-axis mining dump truck of the present utility model includes a brake valve 1, the brake valve 1 is used for controlling the brake on three axes to operate, the brake valve 1 is connected with a charging valve 2, the charging valve 2 is used for supplying the pressure oil output by a hydraulic pump to the brake valve 1 and a relay valve, and the brake includes: the front axle service brake 3, the front axle service brake 3 is connected with the brake valve 1, the front axle service brake 3 is used for controlling the front axle, the front axle service brake 3 is connected with the first relay valve 6, and the first relay valve 6 is connected with the front axle running accumulator 7; the intermediate bridge service brake 4, the intermediate bridge service brake 4 is connected with the brake valve 1, the intermediate bridge service brake 4 is used for controlling the intermediate bridge, the intermediate bridge service brake 4 is connected with the second relay valve 8, and the second relay valve 8 is connected with the intermediate bridge service accumulator 9; the rear axle service brake 5 is connected with the brake valve 1, the rear axle service brake 5 is used for controlling the rear axle, the rear axle service brake 5 is connected with the third relay valve 10, and the rear axle is connected with the rear axle service accumulator 11; three paths of brakes are respectively and independently connected through the brake valve 1, the lower cavity is connected to the rear axle service brake 5, the middle cavity is connected to the middle axle service brake 4, the upper cavity is connected to the front axle service brake 3, meanwhile, the problems that oil return is not timely due to too long brake pipelines can be solved by adding the first relay valve 6, the second relay valve 8 and the third relay valve 10, the relay valve is controlled by utilizing the pilot of the brake valve 1, and the pressure oil of an energy accumulator positioned at the relay valve is rapidly supplied to the brakes to rapidly brake.
As shown in fig. 1 and 2, the first hydraulic assembly 104, the second hydraulic assembly 105 and the third hydraulic assembly 106 are all connected with accumulators, and an accumulator low-pressure alarm switch 12 is arranged between the front axle running accumulator 7, the middle axle running accumulator 9 and the rear axle running accumulator 11 and the charging valve 2; the front axle driving energy accumulator 7, the middle axle driving energy accumulator 9 and the rear axle driving energy accumulator 11 can store energy for a braking system, in the running of a vehicle, the stability of a driving braking pressure source is ensured, the normal braking of the vehicle is ensured, the failure or the stopping state of the pressure source is ensured, the braking capacity of the driving brake is also 3-5 times, an energy accumulator low-voltage alarm switch 12 is connected between the front axle driving energy accumulator 7, the middle axle driving energy accumulator 9 and the rear axle driving energy accumulator 11 and the charging valve 2, the working state of the energy accumulator can be detected through the energy accumulator low-voltage alarm switch 12, whether the pressure source of the braking system is normal is reflected, and when the pressure of the energy accumulator is low, an electric signal can be sent out to remind a driver of timely checking, and early detection of the problem is early.
As shown in fig. 1 and 2, in an embodiment of the present utility model, a brake valve 1 includes a valve body 101, a brake pedal 102 is provided on the valve body 101, a tappet 103 is provided between the valve body 101 and the brake pedal 102, a hydraulic assembly is provided on the valve body 101, the hydraulic assembly includes a first hydraulic assembly 104, a second hydraulic assembly 105, and a third hydraulic assembly 106, and the first hydraulic assembly 104, the second hydraulic assembly 105, and the third hydraulic assembly 106 are vertically arranged on the valve body 101; the hydraulic oil output by the hydraulic pump is supplied to the brake valve 1, the first relay valve 6, the second relay valve 8 and the third relay valve 10 through the liquid filling valve 2, when braking action is required to be executed, the brake pedal 102 on the valve body 101 is stepped down, under the action of the tappet 103, the output pressures of the first hydraulic component 104, the second hydraulic component 105 and the third hydraulic component 106 on the valve body 101 are respectively controlled by leading the first relay valve 6, the second relay valve 8 and the third relay valve 10 to output braking pressure to the front axle service brake 3, the middle axle service brake 4 and the rear axle service brake 5 in proportion, braking is realized, quick braking and oil return are realized, the problem of delayed braking and untimely oil return caused by pipelines is solved, the quick response of the service braking is ensured through the front axle service brake 7, the middle axle service accumulator 9 and the rear axle service accumulator 11, the brake is quickly given to the brakes, the brake valves are vertically arranged, the three-way brake valves are divided into three circuits which are suitable for a mine dump truck with large vertical space in the cab, and can be respectively controlled by a three-way brake valve, and a single brake axle service brake and a public axle service brake is not required to be separately controlled.
Embodiment two:
as shown in fig. 1 and fig. 2, on the basis of the first embodiment, the present utility model provides a technical solution: the front axle service brake 3, the middle axle service brake 4 and the rear axle service brake 5 are connected with a brake pressure gauge 13, and the brake pressure gauge 13 is provided with three parts; the three brake pressure gauges 13 can detect the braking states of the front axle service brake 3, the middle axle service brake 4 and the rear axle service brake 5, the three brake pedals 102 are stepped on, the three pressure gauges rise from 0 to the maximum pressure value, and the magnitude of the braking pressure determines the braking capacity of the axle.
As shown in fig. 1 and 2, in the present embodiment, one side of the brake valve 1 is connected to a brake tail lamp switch 14, the brake tail lamp switch 14 is used for outputting an electric signal to control a brake lamp, one-way valves 15 are arranged between the front axle running accumulator 7, the middle axle running accumulator 9 and the rear axle running accumulator 11 and the charging valve 2, and three one-way valves 15 are arranged; the brake tail lamp switch 14 can detect a service brake state, when the brake pedal 102 is stepped on, the brake tail lamp switch 14 outputs an electric signal to control a brake lamp to remind that the rear vehicle is in a brake deceleration state, and the check valve 15 is arranged between the accumulator and the charging valve 2 to prevent oil of the accumulator from flowing backwards, so that after charging is finished, the braking capability of each accumulator is ensured.
Working principle: under the action of the tappet 103, a worker steps on a brake pedal 102 on the valve body 101, so that output pressures of a first hydraulic component 104, a second hydraulic component 105 and a third hydraulic component 106 on the valve body 101 are respectively used for pilot control of a first relay valve 6, a second relay valve 8 and a third relay valve 10, proportional output of brake pressures is carried out on a front axle service brake 3, a middle axle service brake 4 and a rear axle service brake 5, braking is achieved, quick braking and oil return are achieved, abrasion of tires is reduced, the problems of delayed braking and untimely oil return caused by overlong pipelines are solved, quick response of service braking is guaranteed through the front axle service accumulator 7, the middle axle service accumulator 9 and the rear axle service accumulator 11, quick oil supply to the brakes, the brake valves are arranged vertically, the three-way brake valve is divided into an upper loop, a middle loop and a lower loop, the two-way brake valve is distinguished, the three-way brake can be respectively and independently controlled, and a brake loop common to a dump truck is not needed for the middle axle and the rear axle.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (10)
1. The utility model provides a triaxial mine dump truck hydraulic pressure service braking system which characterized in that: the brake device comprises a brake valve (1), wherein the brake valve (1) is used for controlling the brake on three shafts to work, the brake valve (1) is connected with a charging valve (2), the charging valve (2) is used for supplying pressure oil output by a hydraulic pump to the brake valve (1) and a relay valve, and the brake comprises:
the front axle service brake (3), the front axle service brake (3) is connected with the brake valve (1), the front axle service brake (3) is used for controlling the front axle, the front axle service brake (3) is connected with the first relay valve (6), and the first relay valve (6) is connected with the front axle service accumulator (7);
the intermediate bridge service brake (4), the intermediate bridge service brake (4) is connected with the brake valve (1), the intermediate bridge service brake (4) is used for controlling the intermediate bridge, the intermediate bridge service brake (4) is connected with the second relay valve (8), and the second relay valve (8) is connected with the intermediate bridge service accumulator (9);
the rear axle service brake (5), rear axle service brake (5) are connected with brake valve (1), rear axle service brake (5) are used for controlling the rear axle, rear axle service brake (5) are connected with third relay valve (10), be connected with rear axle service accumulator (11) on the rear axle.
2. The three-axis mining dump truck hydraulic service brake system according to claim 1, wherein: the brake valve (1) comprises a valve body (101), a brake pedal (102) is arranged on the valve body (101), a tappet (103) is arranged between the valve body (101) and the brake pedal (102), and a hydraulic assembly is arranged on the valve body (101).
3. The three-axis mining dump truck hydraulic service brake system according to claim 2, wherein: the hydraulic assembly comprises a first hydraulic assembly (104), a second hydraulic assembly (105) and a third hydraulic assembly (106), and the first hydraulic assembly (104), the second hydraulic assembly (105) and the third hydraulic assembly (106) are vertically arranged on the valve body (101).
4. A three-axis mining dump truck hydraulic service brake system according to claim 3, wherein: the first hydraulic assembly (104), the second hydraulic assembly (105) and the third hydraulic assembly (106) are all connected with an accumulator.
5. The three-axis mining dump truck hydraulic service brake system according to claim 1, wherein: an accumulator low-pressure alarm switch (12) is arranged among the front axle driving accumulator (7), the middle axle driving accumulator (9), the rear axle driving accumulator (11) and the charging valve (2).
6. The three-axis mining dump truck hydraulic service brake system according to claim 1, wherein: and the front axle service brake (3), the middle axle service brake (4) and the rear axle service brake (5) are connected with brake pressure gauges (13).
7. The three-axis mining dump truck hydraulic service brake system according to claim 6, wherein: the brake pressure gauge (13) is provided with three.
8. The three-axis mining dump truck hydraulic service brake system according to claim 1, wherein: one side of the brake valve (1) is connected with a brake tail lamp switch (14), and the brake tail lamp switch (14) is used for outputting an electric signal to control a brake lamp.
9. The three-axis mining dump truck hydraulic service brake system according to claim 1, wherein: and a one-way valve (15) is arranged between the front axle driving energy accumulator (7), the middle axle driving energy accumulator (9), the rear axle driving energy accumulator (11) and the charging valve (2).
10. The three-axis mining dump truck hydraulic service brake system according to claim 9, wherein: the one-way valve (15) is provided with three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223314738.4U CN218986603U (en) | 2022-12-09 | 2022-12-09 | Hydraulic service braking system of three-axis mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223314738.4U CN218986603U (en) | 2022-12-09 | 2022-12-09 | Hydraulic service braking system of three-axis mining dump truck |
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| Publication Number | Publication Date |
|---|---|
| CN218986603U true CN218986603U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223314738.4U Active CN218986603U (en) | 2022-12-09 | 2022-12-09 | Hydraulic service braking system of three-axis mining dump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218986603U (en) |
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2022
- 2022-12-09 CN CN202223314738.4U patent/CN218986603U/en active Active
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