Loader control system and method provided with snow thrower

Abstract

The invention provides a loader control system provided with a snow thrower, and belongs to the technical field of snow throws.The loader control system comprises a walking pump, a walking motor, a working pump, a working motor, an engine and a controller, the input end of the walking pump is connected with an output shaft of the engine, and the output end of the walking pump is connected with the input end of the walking motor through a hydraulic oil pipe; the input end of the working pump is connected with an output shaft of the engine, the output end of the working pump is connected with the input end of the working motor through a hydraulic oil pipe, and the controller is electrically connected with the control end of the engine and displacement electromagnetic valves on the walking pump and the walking motor. The engine on the loader can be used for controlling the loader to walk and the snow throwing machine to run, it is guaranteed that the vehicle speed is matched with the running speed of the snow throwing machine, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of snow throwers, and in particular relates to a loader control system and method for installing a snow thrower. Background Art

[0002] When the current loader is used with a snow thrower, the power of the snow thrower comes from the motor drive, and the motor is supplied with oil by the working pump in the loader. The speed of the motor depends on the hydraulic flow of the working pump. The working pump is installed on the engine, and the speed of the working pump depends on the engine speed.

[0003] If there is a lot of snow and you want to increase the amount of snow thrown away, you need to increase the speed of the working pump, which means you need to increase the engine speed. At this time, you need to step on the accelerator deeply; increasing the accelerator will increase the vehicle speed; increasing the vehicle speed will increase the amount of snow that the vehicle needs to throw away per unit time.

[0004] Therefore, the existing loader is matched with a snow thrower, which requires the snow thrower to have its own power system, that is, its own engine and other components. Otherwise, the vehicle speed cannot match the operating speed of the snow thrower, and it cannot adapt to working conditions with different amounts of snow. However, this adds a power system, which has a higher production cost. Summary of the invention

[0005] In response to the defects or shortcomings in the prior art, the present invention provides a control system and method for a loader equipped with a snow thrower, which can use the engine on the loader to control the movement of the loader and the operation of the snow thrower respectively, and ensure that the vehicle speed matches the operating speed of the snow thrower, thereby reducing production costs.

[0006] To achieve the above object, the present invention adopts the following technical solution: In the first aspect, an embodiment of the present invention provides a loader control system equipped with a snow thrower, including a travel pump, a travel motor, a working pump, a working motor, an engine and a controller, wherein the input end of the travel pump is connected to the output shaft of the engine, the output end of the travel pump is connected to the input end of the travel motor through a hydraulic oil pipe, the input end of the working pump is connected to the output shaft of the engine, the output end of the working pump is connected to the input end of the working motor through a hydraulic oil pipe, and the controller is electrically connected to the control end of the engine and the displacement solenoid valves on the travel pump and the travel motor, respectively.

[0007] Furthermore, the output end of the travel motor is connected to the input end of a gearbox, and the output end of the gearbox is connected to a drive axle via a transmission shaft, and the drive axle is used to drive the wheels to rotate.

[0008] Furthermore, the output end of the working motor is connected in series with the snow throwing impeller and the auger respectively, a first reducer is arranged between the working motor and the snow throwing impeller, and a second reducer is arranged between the snow throwing impeller and the auger.

[0009] Furthermore, a pressure sensor is provided on the travel motor for detecting the pressure on the output side of the travel motor. The pressure sensor is electrically connected to the controller, and the loader load is determined according to the pressure on the output side of the travel motor measured by the pressure sensor.

[0010] Furthermore, it also includes a cruise control switch and a speed setting knob, both of which are connected to the controller. The cruise control switch enables the loader to set the driving speed, and the speed setting knob is used to adjust the speed.

[0011] Furthermore, it also includes a speed setting function switch and an engine speed setting knob, which are used to fix and adjust the engine speed, thereby controlling the operating speed of the working pump.

[0012] Furthermore, the cruise control switch, the vehicle speed setting knob, the speed setting function switch and the engine speed setting knob are all located in the cab.

[0013] In a second aspect, an embodiment of the present invention further provides a method for controlling a loader equipped with a snow thrower, using the control system of a loader equipped with a snow thrower as described above, comprising the following steps: When the loader speed needs to be controlled by the throttle, turn off the cruise control function switch, turn on the gear switch, and the controller detects the throttle opening to confirm the current speed requirement. According to the current speed requirement, the engine speed, the displacement of the travel pump and the travel motor are calculated to control the loader speed by the throttle. During this process, the controller also monitors the loader load and the brake pedal opening, so as to adjust the engine speed, the displacement of the travel pump and the travel motor in real time to ensure the normal driving of the loader. When it is necessary to move forward at a set speed, turn on the cruise control function switch, turn on the gear switch, and the controller reads the speed set on the speed setting knob, calculates the engine speed, travel pump and travel motor displacement required for the set speed, and enables the vehicle to travel at the set speed; The operating speed of the snow thrower is controlled by adjusting the engine speed. When the operating speed of the snow thrower needs to be adjusted, first turn on the engine speed setting function switch. At this time, the controller detects that the engine speed setting function switch is turned on, and reads the speed set on the engine speed setting knob. At the same time, the engine speed is adjusted according to the engine speed demand value required by the vehicle speed.

[0014] Furthermore, the engine speed is adjusted according to the engine speed demand value required by the vehicle speed, specifically: determining whether the set speed is less than the engine speed demand value required by the vehicle speed, if the set speed is less than the engine speed demand value required by the vehicle speed at this time, the engine speed will be automatically adjusted to the minimum speed a required by the vehicle speed, and the adjustment range of the engine speed is a-2000r / min at this time; if the set speed is greater than the engine speed demand value required by the vehicle speed at this time, the engine will be increased to the set value.

[0015] Furthermore, after turning off the engine speed setting function switch, the engine speed will be adjusted to return to the speed required by the current throttle after a set delay time.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a travel pump and a travel motor, wherein the input end of the travel pump is connected to the output shaft of the engine, the output end of the travel pump is connected to the input end of the travel motor through a hydraulic oil pipe, and the output end of the travel motor is connected to a drive axle, so that the drive axle is used to drive the wheels to rotate, and a controller is used to control the displacement of the travel pump and the travel motor, so that the speed of the loader is not directly controlled by the engine, and the engine is used to control the operation of the snow thrower, thereby realizing separate control of the loader travel and the snow thrower operation, and ensuring that the vehicle speed matches the operating speed of the snow thrower, thereby reducing the production cost.

[0017] 2. The present invention sets a speed setting function switch, an engine speed setting knob, a cruise control switch and a speed setting knob, and the speed setting function switch, the engine speed setting knob, the cruise control switch and the speed setting knob are all electrically connected to the controller. By setting the cruise control switch and the speed setting knob, the loader can travel at a set speed, and the speed can be adjusted by the speed setting knob. By setting the engine speed setting function switch and the engine speed setting knob, the engine speed can be fixed and adjusted, thereby controlling the operating speed of the working pump, thereby indirectly controlling the speed of the snow thrower to adapt to different amounts of snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a loader control system in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a loader control method in Embodiment 1 of the present invention; Among them, 1. Engine; 2. Travel pump; 3. Travel motor; 4. Gearbox; 5. Drive shaft; 6. Drive axle; 7. Wheel; 8. Working pump; 9. Working motor; 10. Control valve; 11. Snow throwing impeller; 12. Auger; 13. Snow throwing barrel; 14. First reducer; 15. Second reducer. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1 A typical implementation of the present invention is as follows Figure 1 As shown, a loader control system equipped with a snow thrower includes a snow thrower power system, a loader travel system, an engine 1 and a controller, wherein the loader travel system includes a travel pump 2, a travel motor 3 and a drive axle 6, wherein the input end of the travel pump 2 is connected to the output shaft of the engine 1, and the travel pump 2 is driven to rotate by the engine 1, the output end of the travel pump 2 is connected to the travel motor 3 through a hydraulic oil pipe, and the oil discharged by the travel pump 2 drives the travel motor 3 to rotate, the output end of the travel motor 3 is connected to the input end of a gearbox 4, and the output end of the gearbox 4 is connected to the drive axle 6 through a transmission shaft 5, thereby utilizing the drive axle 6 to drive the wheels 7 to rotate.

[0021] The power system of the snow thrower includes a working pump 8, a working motor 9 and an auger 12. The input end of the working pump 8 is connected in series behind the travel pump 2 through a spline, and the working pump 8 is directly driven to rotate by the engine 1, that is, the engine 1 drives the travel pump 2 and the working pump 8 to rotate at the same time. The output end of the working pump 8 is connected to the working motor 9 through a hydraulic oil pipe, and the oil discharged by the working pump 8 drives the working motor 9 to rotate. A control valve 10 is provided on the hydraulic oil pipe, and the control valve 10 can control the on-off and flow direction of the oil.

[0022] The output end of the working motor 9 is respectively connected in series with the snow throwing impeller 11 and the auger 12. The function of the auger 12 is to collect the accumulated snow, roll the accumulated snow into the snow throwing impeller 11, and throw the snow out from the throwing cylinder 13 through the centrifugal effect of the rotation of the snow throwing impeller 11. A first reducer 14 is arranged between the working motor 9 and the snow throwing impeller 11. The working pump 8 drives the snow throwing impeller 11 and the auger 12 to rotate through the first reducer 14. A second reducer 15 is arranged between the snow throwing impeller 11 and the auger 12. The second reducer 15 can achieve the matching of the snow collecting speed of the auger 12 and the snow throwing speed of the impeller, and there is a certain speed ratio requirement between the two.

[0023] The travel pump 2 and the travel motor 3 are both provided with a displacement solenoid valve, and the displacement solenoid valve is connected to the controller, so that the displacement of the travel pump 2 and the travel motor 3 is controlled by the controller. The travel motor 3 is also provided with a pressure sensor for detecting the output side pressure of the travel motor 3. The pressure sensor is electrically connected to the controller. The loader load is determined according to the output side pressure of the travel motor 3 measured by the pressure sensor, so as to adjust the displacement of the travel motor 3 to ensure normal driving of the vehicle.

[0024] The controller is electrically connected to the control end of the engine 1 and is used to obtain and adjust the rotation speed of the engine 1 .

[0025] It also includes a speed setting function switch, an engine speed setting knob, a cruise control switch and a vehicle speed setting knob. The speed setting function switch, the engine speed setting knob, the cruise control switch and the vehicle speed setting knob are all arranged in the cab and connected to the controller, so that the staff can control the engine speed and vehicle speed conveniently.

[0026] By setting the cruise control switch and the speed setting knob, the loader can travel at the set speed, and the speed can be adjusted by the speed setting knob. By setting the engine speed setting function switch and the engine speed setting knob, the engine speed can be fixed and adjusted, thereby controlling the operating speed of the working pump 8, thereby indirectly controlling the speed of the snow thrower to adapt to different amounts of snow. The engine speed operating range is 800r / min-2000r / min.

[0027] Embodiment 2 This embodiment provides a method for controlling a loader equipped with a snow thrower, using a loader control system equipped with a snow thrower as described in the first embodiment. Figure 2 As shown, the following steps are included: When the loader speed needs to be controlled by the throttle, turn off the cruise control function switch, turn on the gear switch, and the controller detects the throttle opening to confirm the current speed requirement. According to the current speed requirement, the engine speed, the displacement of the travel pump and the travel motor are calculated to control the loader speed by the throttle. During this process, the controller also monitors the loader load and the brake pedal opening, so as to adjust the engine speed, the displacement of the travel pump and the travel motor in real time to ensure the normal driving of the loader. When it is necessary to move forward at a set speed, turn on the cruise control function switch, turn on the gear switch, and the controller reads the speed set on the speed setting knob, calculates the engine speed, travel pump and travel motor displacement required for the set speed, and enables the vehicle to travel at the set speed; The calculation process of the loader speed is as follows: Hydraulic travel system speed ratio:

[0028] Overall drive train ratio:

[0029] Wheel speed:

[0030] Speed:

[0031] in: is the displacement of the motor, in ml / r; is the displacement of the pump, in ml / r; is the total speed ratio of the drive axle and the gearbox; is the engine output speed, in r / min; D is the wheel diameter, in m.

[0032] The engine speed, travel pump and travel motor displacement can determine the vehicle speed. The controller obtains the current vehicle speed demand and reversely calculates the engine speed, travel pump and travel motor displacement required under the vehicle speed demand according to the above formula. The wheel diameter D and the total speed ratio of the drive axle and the gearbox in the formula are known parameters of the vehicle.

[0033] The operating speed of the snow thrower is controlled by adjusting the engine speed. When the operating speed of the snow thrower needs to be adjusted, first turn on the engine speed setting function switch. At this time, the controller detects that the engine speed setting function switch is turned on and reads the speed set on the engine speed setting knob. If the set speed is less than the engine speed demand value required by the vehicle speed at this time, the engine speed will be automatically adjusted to the minimum speed a required by the vehicle speed. At this time, the adjustment range of the engine speed is a-2000r / min; if the set speed is greater than the engine speed demand value required by the vehicle speed at this time, the engine will be increased to the set value, and the displacement of the working pump and the working motor will be recalculated to ensure that the vehicle speed remains unchanged at this time.

[0034] After turning off the engine speed setting function switch, the engine speed will be adjusted back to the speed required by the current throttle after a delay of 5 seconds to ensure that the snow in the snow thrower is completely thrown out to avoid blockage.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A loader control system equipped with a snow thrower, characterized in that: It includes a travel pump, a travel motor, a working pump, a working motor, an engine and a controller. The input end of the travel pump is connected to the output shaft of the engine, the output end of the travel pump is connected to the input end of the travel motor through a hydraulic oil pipe, the input end of the working pump is connected to the output shaft of the engine, the output end of the working pump is connected to the input end of the working motor through a hydraulic oil pipe, and the controller is electrically connected to the control end of the engine and the displacement solenoid valves on the travel pump and the travel motor.

2. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: The output end of the travel motor is connected to the input end of the gearbox, and the output end of the gearbox is connected to the drive axle through a transmission shaft, and the drive axle is used to drive the wheels to rotate.

3. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: The output end of the working motor is connected in series with the snow throwing impeller and the auger respectively, a first reducer is arranged between the working motor and the snow throwing impeller, and a second reducer is arranged between the snow throwing impeller and the auger.

4. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: The travel motor is also provided with a pressure sensor for detecting the pressure at the output side of the travel motor. The pressure sensor is electrically connected to the controller, and the load of the loader is determined according to the pressure at the output side of the travel motor measured by the pressure sensor.

5. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: The loader also includes a cruise control switch and a speed setting knob. Both the cruise control switch and the speed setting knob are connected to the controller. The cruise control switch enables the loader to set the speed for driving, and the speed setting knob is used to adjust the speed.

6. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: It also includes a speed setting function switch and an engine speed setting knob, which are used to fix and adjust the engine speed, thereby controlling the operating speed of the working pump.

7. A loader control system equipped with a snow thrower as claimed in claim 1, characterized in that: The cruise control switch, vehicle speed setting knob, speed setting function switch and engine speed setting knob are all located in the cab.

8. A method for controlling a loader equipped with a snow thrower, using a loader control system equipped with a snow thrower as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: When the loader speed needs to be controlled by the throttle, turn off the cruise control function switch, turn on the gear switch, and the controller detects the throttle opening to confirm the current speed requirement. According to the current speed requirement, the engine speed, the displacement of the travel pump and the travel motor are calculated to control the loader speed by the throttle. During this process, the controller also monitors the loader load and the brake pedal opening, so as to adjust the engine speed, the displacement of the travel pump and the travel motor in real time to ensure the normal driving of the loader. When it is necessary to move forward at a set speed, turn on the cruise control function switch, turn on the gear switch, and the controller reads the speed set on the speed setting knob, calculates the engine speed, travel pump and travel motor displacement required for the set speed, and enables the vehicle to travel at the set speed; The operating speed of the snow thrower is controlled by adjusting the engine speed. When the operating speed of the snow thrower needs to be adjusted, first turn on the engine speed setting function switch. At this time, the controller detects that the engine speed setting function switch is turned on, and reads the speed set on the engine speed setting knob. At the same time, the engine speed is adjusted according to the engine speed demand value required by the vehicle speed.

9. A method for controlling a loader equipped with a snow thrower as claimed in claim 8, characterized in that: The engine speed is adjusted according to the engine speed demand value required by the vehicle speed, specifically: determine whether the set speed is less than the engine speed demand value required by the vehicle speed. If the set speed is less than the engine speed demand value required by the vehicle speed at this time, the engine speed will be automatically adjusted to the minimum speed a required by the vehicle speed. At this time, the adjustment range of the engine speed is a-2000r / min; if the set speed is greater than the engine speed demand value required by the vehicle speed at this time, the engine will be increased to the set value.

10. A method for controlling a loader equipped with a snow thrower as claimed in claim 8, characterized in that: After turning off the engine speed setting function switch, the engine speed will be adjusted back to the speed required by the current throttle after a delay of the set time.

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