Pneumatic brake system of wide-body mining dump truck

Abstract

The utility model discloses an air brake system of a wide-body mining dump truck in the technical field of wide-body mining dump trucks. The air brake system comprises an air supply assembly. The air cylinder assembly comprises a first air cylinder, a second air cylinder and a third air cylinder; the brake valve assembly comprises a front axle relay valve, a middle axle relay valve, a rear axle relay valve and a differential relay valve; the brake chambers comprise a front axle brake chamber, a middle axle brake chamber and a rear axle brake chamber; the brake control piece comprises a foot valve and a hand valve; wherein the first air cylinder and the second air cylinder are communicated with front axle, middle axle and rear axle relay valve control ports through foot valves, and are communicated with front axle, middle axle and rear axle brake chamber running ports through front axle, middle axle and rear axle relay valves; and the third air cylinder is communicated with a differential relay valve control port through a hand valve and is connected with parking ports of brake chambers of the front axle, the middle axle and the rear axle through the differential relay valve. The pneumatic braking system adopts a pneumatic control mode to form a reliable braking system, so that the braking reliability of the wide-body mining dump truck is effectively improved, and the braking safety of the whole truck is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wide -body mining dump truck technical field, especially wide -body mining dump truck's air brake system of a kind of. BACKGROUND

[0002] Heavy wide -body mining dump truck belongs to off -highway dump truck, with the advantage of large load, high working efficiency, widely used in large -scale open -pit mining and earth -moving construction engineering. Brake system is an important component of wide -body mining dump truck, and has a vital influence on the safety and reliability of vehicle, and is related to life and property safety.

[0003] At present, for heavy wide -body mining dump truck, wheel brake system is widely used. By matching the diaphragm brake air chamber of the wheel brake of vehicle, compressed air enters the brake air chamber, so that the diaphragm is deformed to push the push rod, so as to drive the brake adjusting arm and brake cam to rotate and realize wheel brake.

[0004] Due to the heavy wide -body mining dump truck in actual working condition, the whole vehicle load is large, and the running condition is relatively poor, and the wheel brake system is not enough to meet the whole vehicle brake, so a reliable air brake system is needed. UTILITY MODEL CONTENT

[0005] The application provides a wide -body mining dump truck air brake system, which effectively improves the brake reliability of wide -body mining dump truck, and improves the whole vehicle brake safety.

[0006] The application provides a wide -body mining dump truck air brake system, which comprises a gas supply assembly, a gas cylinder assembly, a brake valve assembly, a brake air chamber and a brake control piece.

[0007] The gas supply assembly is connected with the gas cylinder assembly, and is used to supply gas to the gas cylinder assembly.

[0008] The gas cylinder assembly comprises a first gas cylinder, a second gas cylinder and a third gas cylinder.

[0009] The brake valve assembly comprises a front axle follow-up valve, a middle axle follow-up valve, a rear axle follow-up valve and a differential follow-up valve.

[0010] The brake air chamber comprises a front axle brake air chamber, a middle axle brake air chamber and a rear axle brake air chamber.

[0011] The brake control piece comprises a foot valve and a hand valve.

[0012] The first air cylinder is connected with the foot valve air inlet and the front axle relay valve air inlet respectively, the second air cylinder is connected with the foot valve air inlet, the middle axle relay valve and the rear axle relay valve air inlet respectively, the foot valve air outlet is connected with the front axle relay valve, the middle axle relay valve and the rear axle relay valve control port respectively, and the front axle relay valve, the middle axle relay valve and the rear axle relay valve are connected with the front axle brake chamber, the middle axle brake chamber and the rear axle brake chamber driving port; the third air cylinder is connected with the hand valve and the differential relay valve air inlet, the hand valve air outlet is connected with the control port of the differential relay valve, and the differential relay valve is also connected with the front axle brake chamber, the middle axle brake chamber and the rear axle brake chamber parking port respectively.

[0013] The beneficial effects of the above embodiment are that the air brake system adopts an air pressure control mode, and is composed of a gas supply assembly, an air cylinder assembly, a brake valve assembly, a brake chamber and a brake control piece, to form a reliable driving brake system and a parking brake system, meet the whole vehicle braking demand, effectively improve the braking reliability of the wide-body mine dump truck, and improve the whole vehicle braking safety.

[0014] On the basis of the above embodiment, the application can be further improved, specifically as follows:

[0015] In one of the embodiments of the application, the gas supply assembly comprises an air compressor, a condenser, a dryer and a four-loop protection valve, the air outlet of the air compressor is connected with the air inlet of the condenser, the air outlet of the condenser is connected with the air inlet of the dryer, and the air outlet of the dryer is connected with the air inlet of the four-loop protection valve; the air outlets of the four-loop protection valve are respectively connected with the first air cylinder, the second air cylinder and the third air cylinder.

[0016] In one of the embodiments of the application, the air cylinder assembly further comprises a fourth air cylinder, and the second air cylinder is connected with the middle axle relay valve air inlet in series with the fourth air cylinder. The air volume of the middle and rear axle brake circuit is increased, and the reliability is improved.

[0017] In one of the embodiments of the application, the brake valve assembly further comprises a quick release valve, and the differential relay valve is connected with the front axle brake chamber parking port through the quick release valve. The front axle brake chamber parking response is accelerated.

[0018] In one of the embodiments of the application, the foot valve air outlet is also connected with another control port of the differential relay valve. That is, the differential relay valve is controlled by the hand valve and the foot valve signals at the same time.

[0019] In one of the embodiments of the application, the air cylinder assembly further comprises a fifth air cylinder, and the brake valve assembly further comprises an electromagnetic valve. The electromagnetic valve controls external air horns, power takeoff, lifting handle, axle differential and other components.

[0020] In one of the embodiments of the present application, the brake valve assembly is respectively installed on the frame cross beam through a valve body fixing support, and the valve body fixing support is connected with the frame cross beam through bolts and locking nuts. The vehicle dynamic motion condition is met, the dynamic stiffness is improved, and the service life of the brake system is prolonged.

[0021] In one of the embodiments of the present application, the condenser is vertically installed on the frame cross beam; and the dryer and the four-circuit protection valve are fixed on the battery box side or the frame cross beam through a support.

[0022] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0023] 1. The air brake system comprises a reliable service brake system and a parking brake system formed by the air supply assembly, the air cylinder assembly, the brake valve assembly, the brake chamber and the brake control, meets the whole vehicle braking demand, effectively improves the braking reliability of the wide-body mine dump truck, and improves the whole vehicle braking safety.

[0024] 2. The air brake system increases the dryer, the condenser and the four-circuit protection valve in the pipeline to remove water, remove impurities and distribute high-pressure gas in the whole system pipeline, and improve the reliability.

[0025] 3. The air brake system disperses the main components of the air brake system on each frame cross beam, is convenient to arrange, and realizes the use demand of the heavy wide-body mine dump truck through the front, middle and rear axles. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0027] Figure 1 It is a connection structure schematic diagram of the air brake system of the wide-body mine dump truck in the embodiments of the present application;

[0028] Among them, 11. air compressor, 12. differential condenser, 13. air dryer, 14. four-circuit protection valve; 21. first air cylinder, 22. second air cylinder, 23. third air cylinder, 24. fourth air cylinder, 25. fifth air cylinder; 31. front axle relay valve, 32. middle axle relay valve, 33. rear axle relay valve, 34. differential relay valve, 35. fast release valve, 36. seven-way electromagnetic valve; 41. front axle brake chamber, 42. middle axle brake chamber, 43. rear axle brake chamber; 51. foot valve, 52. hand valve. DETAILED DESCRIPTION

[0029] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0032] In the description of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this utility model, as well as the features of different embodiments or examples.

[0033] Example:

[0034] like Figure 1 As shown, a pneumatic braking system for a wide-body mining dump truck includes: an air supply assembly, an air reservoir assembly, a brake valve assembly, a brake chamber, and a brake control component.

[0035] The air supply assembly includes an air compressor 11, a differential pressure condenser 12, an air dryer 13, and a four-circuit protection valve 14;

[0036] The gas storage cylinder assembly includes a first gas storage cylinder 21 (60L), a second gas storage cylinder 22 (60L), a third gas storage cylinder 23 (30L), a fourth gas storage cylinder 24 (30L), and a fifth gas storage cylinder 25 (20L).

[0037] Brake valve assembly, including front axle relay valve 31, middle axle relay valve 32, rear axle relay valve 33, differential relay valve 34, fast release valve 35, seven-way electromagnetic valve 36;

[0038] Brake chamber, including front axle brake chamber 41, middle axle brake chamber 42, rear axle brake chamber 43;

[0039] Brake control, including foot valve 51, hand valve 52.

[0040] Among them, the air supply assembly, air compressor 11 outlet and differential condenser 12 inlet connected, differential condenser 12 outlet and air dryer 13 inlet connected, air dryer 13 outlet and four circuit protection valve 14 inlet connected; four circuit protection valve 14 each outlet is connected with the first air cylinder 21 (60L), the second air cylinder 22 (60L), the third air cylinder 23 (30L), the fifth air cylinder 25 (20L). The air supply assembly is used to supply air to each air cylinder.

[0041] The above-mentioned components are combined with each other to form a running brake system, a parking brake system and an auxiliary system.

[0042] Running brake system: the first air cylinder 21 is connected with the inlet of the foot valve 51 and the inlet of the front axle relay valve 31, respectively; the second air cylinder 22 is connected with the inlet of the foot valve 51, the inlet of the middle axle relay valve 32 and the inlet of the rear axle relay valve 33, respectively; the outlet of the foot valve 51 is connected with the control port of the front axle relay valve 31, the middle axle relay valve 32 and the rear axle relay valve 33, respectively; the front axle relay valve 31, the middle axle relay valve 32 and the rear axle relay valve 33 are connected with the running port of the front axle brake chamber 41, the middle axle brake chamber 42 and the rear axle brake chamber 43; among them, the second air cylinder 22 is connected with the fourth air cylinder 24 in series, and the second air cylinder 22 is connected with the inlet of the middle axle relay valve 32 after being connected with the fourth air cylinder 24 in series, thereby increasing the amount of air in the middle and rear axle brake circuit and improving the reliability. The on-off of the front axle relay valve 31, the middle axle relay valve 32 and the rear axle relay valve 33 is controlled through the foot valve 51, so as to control the first air cylinder 21 and the second air cylinder 22 to supply air to the running port of the front axle brake chamber 41, the middle axle brake chamber 42 and the rear axle brake chamber 43 through the front axle relay valve 31, the middle axle relay valve 32 and the rear axle relay valve 33, respectively, thereby implementing the running brake and releasing brake of the front axle, the middle axle and the rear axle.

[0043] Parking brake system: the third air reservoir 23 is connected with the hand valve 52 and the air inlet of the differential relay valve 34, the air outlet of the hand valve 52 is connected with the control port of the differential relay valve 34, and the differential relay valve 34 is also connected with the parking ports of the front axle brake chamber 41, the middle axle brake chamber 42 and the rear axle brake chamber 43 respectively; wherein, the air outlet of the foot valve 51 is also connected with another control port of the differential relay valve 34, that is, the differential relay valve 34 is controlled by the signals of the hand valve 52 and the foot valve 51, but only the signal of the hand valve 52 acts, and the differential relay valve 34 will act; further, the differential relay valve 34 is connected with the parking port of the front axle brake chamber 41 through the quick release valve 35, so as to speed up the parking response of the front axle brake chamber 41 (air brake). The on-off of the differential relay valve 34 is controlled by the hand valve 52, so as to control the third air reservoir 23 to supply air to the parking ports of the front axle brake chamber 41, the middle axle brake chamber 42 and the rear axle brake chamber 43 through the differential relay valve 34, so as to implement the parking brake and release brake of the front axle, the middle axle and the rear axle.

[0044] Auxiliary system: the fifth air reservoir 25 is connected with the seven-way electromagnetic valve 36, and the seven-way electromagnetic valve 36 is used for external air horn, power take-off, lifting handle, axle difference and the like.

[0045] Further, the above-mentioned brake chambers are spring brake chambers, after the spring brake chamber is inflated, the push rod is shortened, and the brake is released; after the spring brake chamber is exhausted, the push rod is elongated, and the brake is implemented.

[0046] Further, the foot valve is installed on the combined pedal box of the cab, and the foot brake valve is installed through four locking nuts, and appropriate adjusting shims are provided to eliminate the error caused by the assembly of the combined pedal.

[0047] Further, the above-mentioned brake valve assemblies are installed on the frame cross beam through the valve body fixing bracket, the valve body fixing bracket is connected with the frame cross beam through the high-strength dacromet bolt and locking nut, the dynamic motion condition of the vehicle is met, the dynamic stiffness is improved, and the service life of the brake system is prolonged.

[0048] The brake valve body of the air brake system is located in the frame cross beam, which is used for controlling the on-off of the air path, and finally implements the brake through the brake chamber. By matching the valve body, the space at the wheel edge of the axle is larger while being lightweight, and the suspension arrangement space structure and performance are further optimized.

[0049] Optionally, the differential pressure condenser is vertically installed on the frame cross beam; the dryer and the four-loop protection valve are fixed on the battery box side or the frame cross beam through the bracket (according to the arrangement requirements of different vehicle models).

[0050] By adopting the above scheme, the air brake system has the advantages of convenient disassembly and assembly, low cost and high overall structural strength. At the same time, the corresponding brake torque can be provided, and the whole vehicle parking brake performance is optimized.

[0051] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0052] 1. The air brake system comprises a reliable service brake system and a reliable parking brake system through the air supply assembly, the air cylinder assembly, the brake valve assembly, the brake chamber and the brake control, meets the whole vehicle braking demand, effectively improves the braking reliability of the wide-body mine dump truck, and improves the whole vehicle braking safety.

[0053] 2. The air brake system is provided with a dryer, a condenser and a four-loop protection valve in the pipeline to remove water, impurities and distribute high-pressure gas in the whole system pipeline, thereby improving the reliability.

[0054] 3. The air brake system disperses the main components of the air brake system at the cross beams of the vehicle frames, is convenient to arrange, and realizes the use demand of the heavy wide-body mine dump truck through the front, middle and rear axles.

[0055] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above embodiments within the scope of the utility model.

Claims

1. A pneumatic brake system for a wide-body mining dump truck, characterized by: The air supply assembly, the air cylinder assembly, the brake valve assembly, the brake chamber and the brake control element are provided. The air supply assembly is connected with the air cylinder assembly to supply air to the air cylinder assembly. The air cylinder assembly comprises a first air cylinder, a second air cylinder and a third air cylinder. The brake valve assembly comprises a front axle follow-up valve, a middle axle follow-up valve, a rear axle follow-up valve and a differential follow-up valve. The brake chamber comprises a front axle brake chamber, a middle axle brake chamber and a rear axle brake chamber. The brake control element comprises a foot valve and a hand valve. The first air cylinder is connected with the foot valve air inlet and the front axle follow-up valve air inlet respectively, the second air cylinder is connected with the foot valve air inlet, the middle axle follow-up valve and the rear axle follow-up valve air inlets respectively, the foot valve air outlet is connected with the control ports of the front axle follow-up valve, the middle axle follow-up valve and the rear axle follow-up valve respectively, the front axle follow-up valve, the middle axle follow-up valve and the rear axle follow-up valve are connected with the driving ports of the front axle brake chamber, the middle axle brake chamber and the rear axle brake chamber respectively, the third air cylinder is connected with the hand valve and the differential follow-up valve air inlet, the hand valve air outlet is connected with the control port of the differential follow-up valve, and the differential follow-up valve is further connected with the parking ports of the front axle brake chamber, the middle axle brake chamber and the rear axle brake chamber respectively.

2. The pneumatic brake system of claim 1, wherein: The air supply assembly comprises an air compressor, a condenser, a dryer and a four-loop protection valve, the air compressor air outlet is connected with the condenser air inlet, the condenser air outlet is connected with the dryer air inlet, and the dryer air outlet is connected with the four-loop protection valve air inlet; the four-loop protection valve air outlets are connected with the first air cylinder, the second air cylinder and the third air cylinder respectively.

3. The pneumatic brake system of claim 1, wherein: The air cylinder assembly further comprises a fourth air cylinder, and the second air cylinder is connected with the middle axle follow-up valve air inlet after being connected with the fourth air cylinder in series.

4. The pneumatic brake system of claim 1, wherein: The brake valve assembly further comprises a quick release valve, and the differential follow-up valve is connected with the front axle brake chamber parking port through the quick release valve.

5. The pneumatic brake system of claim 1, wherein: The foot valve air outlet is further connected with another control port of the differential follow-up valve.

6. The pneumatic brake system of claim 1, wherein: The air cylinder assembly further comprises a fifth air cylinder, and the brake valve assembly further comprises an electromagnetic valve.

7. The pneumatic brake system of claim 1, wherein: The brake valve assembly is installed on the vehicle frame cross beam through a valve body fixing support, and the valve body fixing support is connected with the vehicle frame cross beam through bolts and locking nuts.

8. The pneumatic brake system of claim 2, wherein: The condenser is vertically installed on the vehicle frame cross beam, and the dryer and the four-loop protection valve are fixed on the battery box side or the vehicle frame cross beam through supports.

9. The pneumatic brake system of claim 1, wherein: The foot valve is installed on the driver's cab pedal box.

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