Vehicle brake control system and environment-friendly cleaning vehicle

Abstract

The invention discloses a vehicle brake control system, which relates to the technical field of underground vehicle manufacturing, and mainly comprises a hydraulic assembly, a brake assembly and a synergistic assembly, the hydraulic assembly comprises a hydraulic oil tank, the brake assembly comprises a proportional pedal brake valve and a flow control valve, the proportional pedal brake valve is connected to front wheels and the hydraulic oil tank, and the flow control valve is connected to the hydraulic oil tank. A pedal of the proportional pedal brake valve can be divided into a first part and a second part from light to heavy according to the treading degree and is connected with a flow control valve through a connecting rod, the flow control valve is connected to a hydraulic control system and a hydraulic oil tank of a rear wheel, and a synergistic assembly is connected with an engine through an electric signal and can regulate and control the oil injection amount of the engine. When the pedal steps on the critical point of the first part and the second part, the rear wheel is driven without power and decelerates naturally, and the engine is adjusted to increase the fuel injection quantity. The invention further discloses an environment-friendly cleaning vehicle which comprises the vehicle brake control system. According to the invention, when the vehicle speed is reduced, the working efficiency is basically not influenced.

Description

Technical Field

[0001] The invention relates to the technical field of underground mine vehicle manufacturing, in particular to a vehicle braking control system and an environmentally friendly cleaning vehicle. Background Art

[0002] At present, there is still a basic blank field for professional sanitation vehicles in coal mines. Cleaning work in coal mines still mainly relies on manpower, with low work efficiency and harm to health. At present, the development of ground sanitation vehicles is relatively mature, but the working environment and road conditions of ground sanitation vehicles are very good compared with those in coal mines. The road conditions of ground sanitation vehicles are relatively flat and hardened asphalt roads; while the roadways in coal mines are only hardened in the main lanes, and other lanes are not cement hardened. The road surface is ups and downs, and some coal mine lanes have relatively large slopes and long slope distances. Therefore, the sanitation vehicles used in coal mines have relatively high requirements for vehicle performance. In addition to the functions of sanitation vehicles, they also have high requirements for the vehicle's passability and adaptability. Since the existing road sanitation vehicles use mechanical hydraulic transmission, when used in coal mines, especially when going downhill, the driver must step on the brakes to keep a steady speed while doing sanitation work. However, the transmission characteristic is that after the driver steps on the brakes, the engine speed will drop, and the drop in engine speed will reduce the output power. The reduction in total output power will inevitably reduce the power allocated to sanitation work, affecting the work efficiency of the sanitation vehicle, making it unable to work at full power, and the work efficiency will be affected. Therefore, there is a need for a vehicle braking control system and an environmentally friendly cleaning vehicle that can control the speed without affecting the work output efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle braking control system and an environmentally friendly cleaning vehicle to solve the problems existing in the above-mentioned prior art, so that the working efficiency is basically not affected when the vehicle speed decreases.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a vehicle braking control system, comprising:

[0006] A hydraulic assembly, the hydraulic assembly comprising a hydraulic oil tank for outputting and receiving hydraulic oil;

[0007] A brake assembly, the brake assembly comprising a proportional pedal brake valve and a flow control valve, the proportional pedal brake valve is connected to the brake assembly of the front wheel and the hydraulic oil tank through a hydraulic pipeline, the pedal of the proportional pedal brake valve is connected to the flow control valve through a connecting rod, the proportional pedal brake valve can be divided into a first part and a second part according to the degree of pedal stepping from light to heavy, the flow control valve is connected to the hydraulic control system of the rear wheel and the hydraulic oil tank through a hydraulic pipeline, when the pedal of the proportional pedal brake valve is stepped on to the first part, the connecting rod drives the flow control valve to move, and the movement of the flow control valve can change the flow of hydraulic oil in the hydraulic control system, thereby controlling the movement state of the rear wheel; when the pedal of the proportional pedal brake valve is stepped on to the dividing point between the first part and the second part, the hydraulic oil in the hydraulic control system does not circulate; when the pedal of the proportional pedal brake valve is stepped on to the second part, the proportional pedal brake valve controls the hydraulic oil to reach the brake assembly of the front wheel for forced braking;

[0008] The enhancement component includes a controller, which is connected to the engine electrical signal and can adjust the fuel injection amount of the engine. When the pedal of the proportional pedal brake valve is stepped on to the critical point between the first part and the second part, the rear wheel is driven without power, and the controller controls the engine to increase the fuel injection amount.

[0009] Preferably, the hydraulic assembly also includes a working pump and an accumulator, one interface of the working pump is connected to the hydraulic oil tank, and the other interface is connected to the proportional pedal brake valve and the accumulator is arranged on the connecting pipeline, the working pump is used to pump the hydraulic oil to the accumulator and the proportional pedal brake valve, and the accumulator is used to store hydraulic oil and release energy.

[0010] Preferably, the hydraulic assembly further comprises an oil suction filter, which is arranged on a connecting pipeline between the working pump and the hydraulic oil tank and is used for filtering the hydraulic oil.

[0011] Preferably, the hydraulic component also includes an overflow valve group and a pressure measuring joint, the overflow valve group is provided with a first oil outlet, a second oil outlet, a third oil outlet and a first oil inlet, the first oil inlet is connected to the working pump, the first oil outlet is connected to the pressure measuring joint, the second oil outlet is connected to the accumulator and the proportional pedal brake valve through a one-way valve, the third oil outlet is connected to the hydraulic oil tank, the pressure measuring joint is connected to a pressure gauge, when the pressure gauge detects that the pressure of the hydraulic oil exceeds a preset value, the hydraulic oil flows back to the hydraulic oil tank through the third oil outlet, and when the pressure gauge detects that the pressure of the hydraulic oil does not exceed the preset value, the hydraulic oil flows into the accumulator and the proportional pedal brake valve through the second oil outlet.

[0012] Preferably, the proportional pedal brake valve is provided with a first oil inlet, a first oil drain and a first oil port, the first oil inlet is connected to the accumulator, the first oil drain is connected to the hydraulic oil tank, and the first oil port is connected to the brake assembly of the front wheel. When forced braking is required, the hydraulic oil discharged from the accumulator flows into the brake assembly of the front wheel through the first oil inlet and the first oil port; when braking is completed, the hydraulic oil enters the proportional pedal brake valve through the first oil port, and then flows back to the hydraulic oil tank through the first oil drain.

[0013] Preferably, the hydraulic control system of the rear wheel includes a travel pump, which is a swash plate pump including the swash plate, and the travel pump is provided with a first oil inlet hole, a first oil hole, a second oil hole, and a first oil outlet hole. The input end of the travel pump is connected to the output end of the engine, and the first oil inlet hole is connected to the hydraulic oil tank for receiving the hydraulic oil in the hydraulic oil tank. The first oil hole and the second oil hole are used for outputting and receiving hydraulic oil, and are both connected to the driving device of the rear wheel. When the hydraulic oil flows out through the first oil hole, flows into the driving device of the rear wheel and then flows back through the second oil hole, the driving device can drive the rear wheel to turn forward; when the hydraulic oil flows out through the second oil hole, flows into the driving device of the rear wheel and then flows back through the first oil hole, the driving device can drive the rear wheel to turn backward. The first oil outlet hole is connected to the flow control valve.

[0014] Preferably, the driving device includes a walking motor, the rear wheel is provided with a rear wheel reducer, the output end of the walking motor is connected to the rear wheel reducer, and the walking motor is provided with a first inlet and a second inlet, the first inlet and the second inlet are both connected to the walking pump, wherein the first inlet and the second inlet are arranged close to the walking pump, and the second inlet and the second inlet are arranged away from the walking pump, when the hydraulic oil flows in through the first inlet and then flows out through the second inlet, the rear wheel rotates forward; when the hydraulic oil flows in through the second inlet and then flows out through the first inlet, the rear wheel rotates backward.

[0015] Preferably, the flow control valve is a swash plate control valve, which is provided with a first oil inlet hole and a first oil drain hole, the first oil inlet hole is connected to the first oil outlet hole, and the first oil drain hole is connected to the hydraulic oil tank, and when the pedal is stepped on, the connecting rod drives the first oil inlet hole and the first oil drain hole of the swash plate control valve to open, and the hydraulic oil in the travel pump enters the first oil inlet hole through the first oil outlet hole, and then flows back to the hydraulic oil tank through the first oil drain hole.

[0016] Preferably, the controller includes a hand throttle and an electronic control unit, the hand throttle is electrically connected to the electronic control unit via signals, the electronic control unit is electrically connected to the control end of the engine via signals, different electrical signals can be output to the electronic control unit by adjusting the hand throttle, the electronic control unit transmits electrical signals to the control end of the engine, and the control end of the engine can regulate the fuel injection amount of the engine.

[0017] The present invention also provides an environmentally friendly cleaning vehicle, comprising the vehicle braking control system as described above.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The hydraulic assembly of the present invention includes a hydraulic oil tank for outputting and receiving hydraulic oil, and the brake assembly includes a proportional pedal brake valve and a flow control valve. The proportional pedal brake valve is connected to the brake assembly and the hydraulic oil tank of the front wheel through a hydraulic pipeline. The pedal of the proportional pedal brake valve is connected to the flow control valve through a connecting rod. The proportional pedal brake valve can be divided into a first part and a second part from light to heavy according to the degree of pedaling. The flow control valve is connected to the hydraulic control system and the hydraulic oil tank of the rear wheel through a hydraulic pipeline. When the pedal of the proportional pedal brake valve is stepped on to the first part, the connecting rod drives the flow control valve to move, and the movement of the flow control valve can change the hydraulic The flow of hydraulic oil in the control system is controlled, thereby controlling the movement state of the rear wheel; when the pedal of the proportional pedal brake valve is stepped on to the dividing point between the first part and the second part, the hydraulic oil in the hydraulic control system does not flow; when the pedal of the proportional pedal brake valve is stepped on to the second part, the proportional pedal brake valve controls the hydraulic oil to reach the brake assembly of the front wheel for forced braking; the efficiency enhancement component includes a controller, which is connected to the engine through an electrical signal and can adjust the fuel injection amount of the engine. When the pedal of the proportional pedal brake valve is stepped on to the critical point between the first part and the second part, the rear wheel has no power to drive and naturally decelerates, and the controller controls the engine to increase the fuel injection amount. When the vehicle is going downhill, the pedal is stepped on the first part or the dividing point between the first part and the second part. At this time, the vehicle driving force is reduced or there is no driving force, the vehicle naturally decelerates, and the engine will also slightly reduce the speed under the action of the load. At this time, the controller is operated, and the controller controls the engine to increase the fuel injection amount and increase the engine speed to ensure that the output power of the engine allocated to the environmental protection cleaning operation part remains unchanged, so that both the vehicle speed can be reduced and the operation output power can be basically unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the principle of a vehicle braking control system in some embodiments of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the hand throttle in some embodiments of the present invention;

[0023] Figure 3 The pressure and angle variation curves of the proportional pedal brake valve and the swash plate control valve in some embodiments of the present invention.

[0024] In the figure: 1-hydraulic oil tank; 2-oil suction filter; 3-working pump; 4-overflow valve group; 41-first oil inlet; 42-first oil outlet; 43-second oil outlet; 44-third oil outlet; 5-pressure measuring joint; 6-check valve; 7-accumulator; 8-proportional pedal brake valve; 81-first oil inlet; 82-first oil port; 83-first oil outlet; 84-pressure measuring interface; 85-pedal; 9-flow control valve; 91-first oil inlet hole; 92-first oil outlet hole; 10-travel pump; 101-first oil inlet hole; 102-first oil hole; 103-second oil hole; 104-first oil outlet hole; 11-travel motor; 111-first inlet and outlet; 112-second inlet and outlet; 12-rear wheel reducer; 13-brake assembly; 14-hand throttle; 15-electronic control unit; 16-engine. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a vehicle braking control system and an environmentally friendly cleaning vehicle to solve the problems existing in the prior art and ensure that the working efficiency is basically not affected when the vehicle speed decreases.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] like Figure 1-Figure 3 As shown, the present invention provides a vehicle braking control system, including a hydraulic component, a brake component 13 and an enhancement component. The hydraulic component includes a hydraulic oil tank 1 for outputting and receiving hydraulic oil; the brake component 13 includes a proportional pedal brake valve 8 and a flow control valve 9. The proportional pedal brake valve 8 is connected to the brake component and the hydraulic oil tank 1 of the front wheel through a hydraulic pipeline. The pedal 85 of the proportional pedal brake valve 8 is connected to the flow control valve 9 through a connecting rod. The proportional pedal brake valve 8 can be divided into a first part and a second part from light to heavy according to the degree of stepping on the pedal 85. The flow control valve 9 is connected to the hydraulic control system and the hydraulic oil tank 1 of the rear wheel through a hydraulic pipeline. When the pedal 85 of the proportional pedal brake valve 8 is stepped on to the first part, the connecting rod drives the flow control valve 9 to move. The movement of the flow control valve 9 can change the flow rate of the hydraulic oil in the hydraulic control system, thereby controlling the movement state of the rear wheel; when the pedal 85 of the proportional pedal brake valve 8 is stepped on to the dividing point between the first part and the second part, the hydraulic oil in the hydraulic control system does not flow, and the rear wheel has no driving force; when the pedal 85 of the proportional pedal brake valve 8 is stepped on to the second part, the proportional pedal brake valve 8 controls the hydraulic oil to reach the brake assembly 13 of the front wheel for forced braking; the efficiency enhancement component includes a controller, which is connected to the engine 16 through an electrical signal and can adjust the fuel injection amount of the engine 16. When the pedal 85 of the proportional pedal brake valve 8 is stepped on to the critical point between the first part and the second part, the rear wheel has no power drive and naturally decelerates, and the controller controls the engine 16 to increase the fuel injection amount. When the vehicle is going downhill, the pedal 85 is stepped on the first part or the dividing point between the first part and the second part. At this time, the driving force of the vehicle is reduced or there is no driving force, the vehicle decelerates naturally, and the engine 16 will slightly reduce the speed under the action of the load. At this time, the controller is operated, and the controller controls the engine 16 to increase the injection amount and increase the speed of the engine 16 to ensure that the output power of the engine 16 allocated to the environmental protection cleaning operation part remains unchanged, so that both the vehicle speed can be guaranteed to decrease and the operation output power can be guaranteed to remain basically unchanged. This operation can ensure that the output power of the engine 16 allocated to the environmental protection cleaning operation part remains basically unchanged. It is very important for vehicles performing specific operation tasks (such as environmental protection cleaning operations). Even if the vehicle speed needs to be controlled when going downhill, the normal operation will not be affected by the change in vehicle speed or the fluctuation in the speed of the engine 16, ensuring that the operation efficiency and quality are not affected, and achieving a good balance between vehicle speed control and operation power guarantee.

[0030] Moreover, the graded setting makes the braking operation more accurate. When the pedal 85 is stepped on to the first part, the motion state of the rear wheel can be controlled by the flow control valve 9 to achieve a relatively soft and gradual braking adjustment, which can better adapt to the deceleration requirements under different road conditions and driving requirements. For example, when a slight deceleration is required during normal driving, the braking degree of the rear wheel can be accurately controlled. When the pedal 85 is stepped on to the dividing point between the first part and the second part, the hydraulic oil flow channel in the hydraulic control system of the rear wheel is closed, the hydraulic oil no longer flows, and the rear wheel has no driving force. At this time, the vehicle can use natural deceleration. At the same time, when the pedal 85 is stepped on to the second part, the hydraulic oil can be controlled to reach the brake assembly 13 of the front wheel for forced braking, so that the front and rear wheel braking are effectively coordinated. First, the rear wheel is naturally decelerated and transitioned, and then the front wheel is forced to brake. The stability and safety of the entire vehicle braking process can be effectively improved, and the dangerous situations such as loss of control and tail swinging of the vehicle due to the uncoordinated braking of the front and rear wheels during emergency braking can be avoided.

[0031] As a preferred embodiment, the front wheel brake assembly 13 is provided with two hydraulic oil inlets, which respectively control the braking of the left front wheel and the right front wheel. After the hydraulic oil reaches the brake assembly 13, the spring of the brake assembly 13 is compressed and the friction plate is tightened to achieve deceleration of the vehicle.

[0032] In some embodiments, the hydraulic assembly further includes a working pump 3 and an accumulator 7, one interface of the working pump 3 is connected to the hydraulic oil tank 1, the other interface is connected to the proportional pedal brake valve 8, and the accumulator 7 is provided on the connecting pipeline, the working pump 3 is used to pump the hydraulic oil to the accumulator 7 and the proportional pedal brake valve 8, and the accumulator 7 is used to store hydraulic oil and release energy. The working pump 3 pumps the hydraulic oil to the accumulator 7, and due to the regulating effect of the accumulator 7, the working environment of the working pump 3 is optimized. The accumulator 7 can balance the flow and pressure of the hydraulic oil output by the working pump 3, so that the working pump 3 does not need to frequently adjust the output power to adapt to the needs of the system. The hydraulic oil stored in the accumulator 7 can play a role when the system needs to respond quickly. For example, when the proportional pedal brake valve 8 needs to act quickly for braking, the accumulator 7 can quickly release the hydraulic oil, so that the braking system can respond to the driver's operation more quickly, shorten the braking reaction time, and improve the braking performance of the vehicle.

[0033] In some embodiments, the hydraulic assembly further includes an oil suction filter 2, which is arranged on the connecting pipeline between the working pump 3 and the hydraulic oil tank 1. The oil suction filter 2 is further directly threadedly connected to the oil outlet of the hydraulic oil tank 1 for filtering the hydraulic oil. The oil suction filter 2 can effectively filter out impurities in the hydraulic oil. The working pump 3 is a key component in the hydraulic system, and has high requirements for the cleanliness of the hydraulic oil. If the hydraulic oil contains impurities such as solid particles and metal chips, these impurities may cause the internal parts of the working pump 3 (such as gears, blades, etc.) to wear more severely after entering the working pump 3 with the hydraulic oil. For example, particulate impurities may get stuck in the precise matching gap of the working pump 3, shortening the service life of the working pump 3. The oil suction filter 2 can block these impurities before the working pump 3, ensuring that only clean hydraulic oil enters the working pump 3, thereby effectively protecting the working pump 3 and reducing its failure rate.

[0034] In some embodiments, the hydraulic assembly further includes a relief valve group 4 and a pressure measuring joint 5. The relief valve group 4 is provided with a first oil outlet 42, a second oil outlet 43, a third oil outlet 44 and a first oil inlet 41. The first oil inlet 41 is connected to the working pump 3, the first oil outlet 42 is connected to the pressure measuring joint 5, the second oil outlet 43 is connected to the accumulator 7 and the proportional pedal brake valve 8 through a one-way valve 6, the third oil outlet 44 is connected to the hydraulic oil tank 1, and the pressure measuring joint 5 is connected to a pressure gauge. When the pressure gauge detects that the pressure of the hydraulic oil exceeds a preset value, the hydraulic oil flows back to the hydraulic oil tank 1 through the third oil outlet 44. When the pressure gauge detects that the pressure of the hydraulic oil does not exceed the preset value, the hydraulic oil flows into the accumulator 7 and the proportional pedal brake valve 8 through the second oil outlet 43. The relief valve group 4 can effectively prevent excessive pressure from causing damage to the entire hydraulic system. For example, in the case where the output power of the working pump 3 suddenly increases or the system load suddenly decreases, the hydraulic oil pressure may rise sharply. If there is no pressure protection mechanism of the relief valve group 4, excessive pressure may cause serious consequences such as rupture of the hydraulic pipeline and damage to the hydraulic components.

[0035] By returning the hydraulic oil to the oil tank when the pressure is too high, the relief valve group 4 can keep the pressure of the hydraulic system within a relatively stable range, which helps the various hydraulic components in the system to work in a safe and stable pressure environment and reduce component wear and failure caused by pressure fluctuations. For example, components such as the proportional pedal brake valve 8 and the flow control valve 9 have high requirements for pressure stability. Stable pressure can ensure the normal opening and closing of these valves, thereby ensuring the normal operation of functions such as the braking system. The pressure measuring joint 5 is threadedly connected to the first oil outlet 42 of the relief valve group 4. The pressure measuring joint 5 is connected to a pressure gauge through a pressure measuring hose, so that the operator can monitor the pressure of the hydraulic oil in real time and can quickly determine whether the hydraulic system is working normally.

[0036] In some embodiments, the proportional pedal brake valve 8 is provided with a first oil inlet 81, a first oil outlet 83 and a first oil port 82. The first oil inlet 81 is connected to the accumulator 7, the first oil outlet 83 is connected to the hydraulic oil tank 1, and the first oil port 82 is connected to the brake assembly 13 of the front wheel. When forced braking is required, the hydraulic oil discharged from the accumulator 7 and the one-way valve 6 flows into the brake assembly 13 of the front wheel through the first oil inlet 81 and the first oil port 82; when braking is completed, the hydraulic oil enters the proportional pedal brake valve 8 through the first oil port 82, and then flows back to the hydraulic oil tank 1 through the first oil outlet 83. The direct hydraulic oil transmission path allows the braking action to respond quickly, and the hydraulic oil can be delivered to the front wheel brake assembly 13 in the shortest time, thereby achieving an efficient forced braking effect. In an emergency, such as an obstacle suddenly appearing in front of the vehicle, the vehicle can be decelerated quickly, effectively ensuring driving safety, and the oil can be returned in time.

[0037] It should be noted that the proportional pedal brake valve 8 is further provided with a pressure measuring interface 84 at the first oil port 82 , which is connected to a pressure gauge to observe whether the pressure of the hydraulic oil is at a normal value.

[0038] In some embodiments, the hydraulic control system of the rear wheel includes a travel pump 10, which is a swash plate pump including a swash plate. The travel pump 10 is provided with a first oil inlet hole 101, a first oil hole 102, a second oil hole 103, and a first oil outlet hole 104. The input end of the travel pump 10 is connected to the output end of the engine 16. Further, the output end of the engine 16 is connected to the transfer case through a flywheel, and the output end of the transfer case is connected to the input end of the travel pump 10. The first oil inlet hole 101 is connected to the hydraulic oil tank 1 for receiving hydraulic oil. The hydraulic oil in the oil tank 1, the first oil hole 102 and the second oil hole 103 are used to output and receive the hydraulic oil, and are both connected to the driving device of the rear wheel. When the hydraulic oil flows out through the first oil hole 102, flows into the driving device of the rear wheel, and then flows back through the second oil hole 103, the driving device can drive the rear wheel to turn forward; when the hydraulic oil flows out through the second oil hole 103, flows into the driving device of the rear wheel, and then flows back through the first oil hole 102, the driving device can drive the rear wheel to turn backward. The first oil outlet 104 is connected to the flow control valve 9. The first oil hole 102 and the second oil hole 103 of the travel pump 10 are connected to the driving device of the rear wheel, and the two-way drive of the rear wheel can be realized through the different flow directions of the hydraulic oil. The first oil outlet 104 of the travel pump 10 is connected to the flow control valve 9, so that the travel pump 10 and the flow control valve 9 can be closely matched. When the pedal of the proportional pedal brake valve 8 is stepped on to different degrees, the flow control valve 9 will move accordingly, and then affect the working state such as the opening degree of the swash plate in the travel pump 10 through the connection with the travel pump 10, so as to achieve precise control of the movement state of the rear wheel. For example, during the braking process, the deceleration of the rear wheel can be effectively controlled by adjusting the travel pump 10 through the flow control valve 9, so as to achieve smooth braking and improve the coordination and reliability of the entire system.

[0039] In some embodiments, the driving device includes a travel motor 11, and the rear wheel is provided with a rear wheel reducer 12. The travel motor 11 is provided with an external spline, and the external spline is connected to the internal spline of the rear wheel reducer 12; and the travel motor 11 is provided with a first inlet and outlet 111 and a second inlet and outlet 112, and the first inlet and outlet 111 and the second inlet and outlet 112 are both connected to the travel pump 10, wherein the first inlet and outlet 111 is arranged close to the travel pump 10, and the second inlet and outlet 112 is arranged away from the travel pump 10, when the hydraulic oil flows in through the first inlet and outlet 111 and then flows out through the second inlet and outlet 112, the rear wheel rotates forward; when the hydraulic oil flows in through the second inlet and outlet 112 and then flows out through the first inlet and outlet 111, the rear wheel rotates backward. The spline connection method has a high load-bearing capacity and transmission accuracy. The spline can ensure that the power transmission between the travel motor 11 and the rear wheel reducer 12 is smooth and accurate while transmitting a large torque, and can effectively reduce the energy loss in the power transmission process, so that the power output by the engine 16 can be efficiently transmitted to the rear wheel to drive the vehicle, which helps to improve the overall power performance of the vehicle.

[0040] It should be noted that there are two travel motors 11, which are used to drive the left rear wheel and the right rear wheel respectively, so as to achieve more accurate power distribution to the left and right rear wheels. During normal driving of the vehicle, the two travel motors 11 can provide independent and appropriate power to the left and right rear wheels according to the actual driving conditions (such as vehicle load distribution, road conditions, etc.). For example, when one side of the vehicle is loaded with a large load, the corresponding travel motor 11 can provide more power, so that the driving force of the left and right rear wheels is more balanced, avoiding unstable driving of the vehicle due to insufficient power on one side, and effectively improving the overall power performance of the vehicle.

[0041] In some embodiments, the flow control valve 9 is a swash plate control valve, which is provided with a first oil inlet hole 91 and a first oil outlet hole 92, wherein the first oil inlet hole 91 is connected to the first oil outlet hole 104, and the first oil outlet hole 92 is connected to the hydraulic oil tank 1. When the pedal is stepped on, the connecting rod drives the first oil inlet hole 91 and the first oil outlet hole 92 of the swash plate control valve to open, and the hydraulic oil in the travel pump 10 enters the first oil inlet hole 91 through the first oil outlet hole 104, and then flows back to the hydraulic oil tank 1 through the first oil outlet hole 92. According to the degree of stepping on the pedal, the degree of opening of the first oil inlet hole 91 and the first oil outlet hole 92 can be controlled, and then the degree of discharge of the hydraulic oil in the travel pump 10 can be controlled. When the pedal is stepped on to the dividing point between the first part and the second part, the first oil inlet hole 91 and the first oil outlet hole 92 are opened to the maximum, and the hydraulic oil in the travel pump 10 is completely discharged, the swash plate is closed, and the travel motor 11 is driven without power.

[0042] In some embodiments, the controller includes a hand throttle 14 and an electronic control unit 15. The hand throttle 14 is connected to the electronic control unit 15 through an electrical signal, and the electronic control unit 15 is connected to the control end of the engine 16 through an electrical signal. By adjusting the hand throttle 14, different electrical signals can be output to the electronic control unit 15. The electronic control unit 15 transmits the electrical signal to the control end of the engine 16. The control end of the engine 16 can adjust the fuel injection amount of the engine 16. The driver can control the fuel injection amount of the engine 16 by directly manually adjusting the position of the hand throttle 14.

[0043] It should be noted that, according to different requirements, the hand throttle 14 can also be directly connected to the speed control port of the engine 16 in the form of a cable ratchet.

[0044] Embodiment 2

[0045] The present invention also provides an environmentally friendly cleaning vehicle, comprising the vehicle braking control system as described above, and the environmentally friendly cleaning vehicle can ensure that the operating output power is not affected while the vehicle is decelerated.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A vehicle braking control system, characterized in that: include A hydraulic assembly, the hydraulic assembly comprising a hydraulic oil tank for outputting and receiving hydraulic oil; A brake assembly, the brake assembly comprising a proportional pedal brake valve and a flow control valve, the proportional pedal brake valve being connected to the brake assembly of the front wheel and the hydraulic oil tank through a hydraulic pipeline, the pedal of the proportional pedal brake valve being connected to the flow control valve through a connecting rod, the proportional pedal brake valve being capable of being divided into a first part and a second part according to the degree of pedaling from light to heavy, the flow control valve being connected to the hydraulic control system of the rear wheel and the hydraulic oil tank through a hydraulic pipeline, when the pedal of the proportional pedal brake valve is stepped on to the first part, the connecting rod drives the flow control valve to move, and the movement of the flow control valve can change the flow of hydraulic oil in the hydraulic control system, thereby controlling the movement state of the rear wheel; When the pedal of the proportional pedal brake valve is stepped on to the dividing point between the first part and the second part, the hydraulic oil in the hydraulic control system does not flow; when the pedal of the proportional pedal brake valve is stepped on to the second part, the proportional pedal brake valve controls the hydraulic oil to reach the brake assembly of the front wheel for forced braking; The enhancement component includes a controller, which is connected to the engine electrical signal and can adjust the fuel injection amount of the engine. When the pedal of the proportional pedal brake valve is stepped on to the critical point between the first part and the second part, the rear wheel is driven without power, and the controller controls the engine to increase the fuel injection amount.

2. The vehicle braking control system according to claim 1, characterized in that: The hydraulic assembly also includes a working pump and an accumulator. One interface of the working pump is connected to the hydraulic oil tank, and the other interface is connected to the proportional pedal brake valve, and the accumulator is arranged on the connecting pipeline. The working pump is used to pump the hydraulic oil to the accumulator and the proportional pedal brake valve, and the accumulator is used to store hydraulic oil and release energy.

3. The vehicle braking control system according to claim 2, characterized in that: The hydraulic assembly further comprises an oil suction filter, which is arranged on a connecting pipeline between the working pump and the hydraulic oil tank and is used for filtering the hydraulic oil.

4. The vehicle braking control system according to claim 2, characterized in that: The hydraulic assembly also includes an overflow valve group and a pressure measuring joint. The overflow valve group is provided with a first oil outlet, a second oil outlet, a third oil outlet and a first oil inlet. The first oil inlet is connected to the working pump, the first oil outlet is connected to the pressure measuring joint, the second oil outlet is connected to the accumulator and the proportional pedal brake valve through a one-way valve, the third oil outlet is connected to the hydraulic oil tank, and the pressure measuring joint is connected to a pressure gauge. When the pressure gauge detects that the pressure of the hydraulic oil exceeds a preset value, the hydraulic oil flows back to the hydraulic oil tank through the third oil outlet. When the pressure gauge detects that the pressure of the hydraulic oil does not exceed the preset value, the hydraulic oil flows into the accumulator and the proportional pedal brake valve through the second oil outlet.

5. The vehicle braking control system according to claim 2, characterized in that: The proportional pedal brake valve is provided with a first oil inlet, a first oil outlet and a first oil port, wherein the first oil inlet is connected to the accumulator, the first oil outlet is connected to the hydraulic oil tank, and the first oil port is connected to the brake assembly of the front wheel. When forced braking is required, the hydraulic oil discharged from the accumulator flows into the brake assembly of the front wheel through the first oil inlet and the first oil port; when braking is completed, the hydraulic oil enters the proportional pedal brake valve through the first oil port and then flows back to the hydraulic oil tank through the first oil outlet.

6. The vehicle braking control system according to claim 1, characterized in that: The hydraulic control system of the rear wheel includes a travel pump, which is a swash plate pump including the swash plate. The travel pump is provided with a first oil inlet hole, a first oil hole, a second oil hole, and a first oil outlet hole. The input end of the travel pump is connected to the output end of the engine. The first oil inlet hole is connected to the hydraulic oil tank for receiving the hydraulic oil in the hydraulic oil tank. The first oil hole and the second oil hole are used for outputting and receiving the hydraulic oil, and are both connected to the driving device of the rear wheel. When the hydraulic oil flows out through the first oil hole, flows into the driving device of the rear wheel, and then flows back through the second oil hole, the driving device can drive the rear wheel to turn forward. When the hydraulic oil flows out through the second oil hole, flows into the driving device of the rear wheel and then flows back through the first oil hole, the driving device can drive the rear wheel to turn backward, and the first oil outlet is connected to the flow control valve.

7. The vehicle braking control system according to claim 6, characterized in that: The driving device includes a travel motor, the rear wheel is provided with a rear wheel reducer, the output end of the travel motor is connected to the rear wheel reducer, and the travel motor is provided with a first inlet and a second inlet, the first inlet and the second inlet are both connected to the travel pump, wherein the first inlet and the second inlet are arranged close to the travel pump, and the second inlet and the second inlet are arranged away from the travel pump, when the hydraulic oil flows in through the first inlet and then flows out through the second inlet, the rear wheel rotates forward; when the hydraulic oil flows in through the second inlet and then flows out through the first inlet, the rear wheel rotates backward.

8. The vehicle braking control system according to claim 6, characterized in that: The flow control valve is a swash plate control valve, which is provided with a first oil inlet hole and a first oil outlet hole, wherein the first oil inlet hole is connected to the first oil outlet hole, and the first oil outlet hole is connected to the hydraulic oil tank. When the pedal is stepped on, the connecting rod drives the first oil inlet hole and the first oil outlet hole of the swash plate control valve to open, and the hydraulic oil in the travel pump enters the first oil inlet hole through the first oil outlet hole, and then flows back to the hydraulic oil tank through the first oil outlet hole.

9. The vehicle braking control system according to claim 1, characterized in that: The controller includes a hand throttle and an electronic control unit, the hand throttle is electrically connected to the electronic control unit by signals, and the electronic control unit is electrically connected to the control end of the engine by signals, and different electrical signals can be output to the electronic control unit by adjusting the hand throttle, and the electronic control unit transmits the electrical signal to the control end of the engine, and the control end of the engine can adjust the fuel injection amount of the engine.

10. An environmentally friendly cleaning vehicle, characterized in that: Comprising a vehicle braking control system as described in any one of claims 1-9.

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