CN213676636U - Loader braking system and loader - Google Patents
Loader braking system and loader Download PDFInfo
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- CN213676636U CN213676636U CN202121316733.8U CN202121316733U CN213676636U CN 213676636 U CN213676636 U CN 213676636U CN 202121316733 U CN202121316733 U CN 202121316733U CN 213676636 U CN213676636 U CN 213676636U
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Abstract
The utility model provides a loader brake system and a loader, and relates to the technical field of engineering vehicles. The loader brake system includes: a gas storage device for storing high-pressure gas; a gas compression device connected to the gas storage device, Used to provide compressed gas into the gas storage device; a hydraulic drive device. The hydraulic drive device includes a hydraulic motor and a hydraulic pump that drives the hydraulic motor to work. The hydraulic motor is in transmission connection with the gas compression device for driving the gas compression device to work. The pneumatic brake system has the technical problems of complex structure and high energy consumption, which achieves the technical effect of simple system, low cost and reduced energy consumption.
Description
Technical Field
The utility model belongs to the technical field of the machineshop car technique and specifically relates to a loader braking system and loader is related to.
Background
Electric loaders typically use pneumatic braking systems. The pneumatic brake system comprises a power battery pack, a motor, an air pump, a brake air tank, a brake air circuit and the like, wherein the power battery pack provides power for the motor, the motor rotates to drive the air pump to compress air, and high-pressure air is stored in the brake air tank and is used by the brake air circuit. The driver can operate the brake pedal or the parking brake mechanism to control the high-pressure gas to enter the brake gas path, so as to realize the brake function.
The air pump in the pneumatic brake system needs to be driven by a power battery pack, a motor controller, a motor and other components, so that the system is complex and high in cost, and the energy consumption of the whole vehicle is increased due to the fact that the motor is used for driving.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system is simple, loader braking system and loader that the energy consumption is low to the system that the vapour-pressure type braking system among the alleviating prior art exists is complicated, technical problem that the energy consumption is high.
The utility model provides a pair of loader braking system, include:
the gas storage device is used for storing high-pressure gas;
the gas compression device is connected with the gas storage device and is used for providing compressed gas into the gas storage device;
the hydraulic driving device comprises a hydraulic motor and a hydraulic pump for driving the hydraulic motor to work, and the hydraulic motor is in transmission connection with the gas compression device and used for driving the gas compression device to work.
Further, the hydraulic motor is a working pump or a walking pump of the loader.
Furthermore, the hydraulic driving device also comprises a control device for controlling the on-off between the hydraulic pump and the hydraulic motor according to the air pressure in the air storage device.
Further, the control device comprises an electromagnetic valve arranged between the hydraulic pump and the hydraulic motor, a pressure sensor used for detecting air pressure in the air storage device, and a control circuit, wherein the control circuit is used for controlling the electromagnetic valve to be opened when the air pressure collected by the pressure sensor is lower than a low-pressure preset value; and when the air pressure collected by the pressure sensor is higher than or equal to a high-pressure preset value, controlling the electromagnetic valve to be closed.
Further, a combination valve is arranged between the gas compression device and the gas storage device, the combination valve comprises a one-way valve and a relief valve, and the one-way valve is used for preventing gas in the gas storage device from flowing back to the gas storage device; and the discharge valve is used for opening to discharge gas to the atmosphere when the air pressure in the air storage device is higher than a protection set value, and closing when the air pressure is lower than the protection set value.
Further, loader braking system's brake gas circuit includes pedal brake gas circuit and parking brake gas circuit, the entry of pedal brake gas circuit and parking brake gas circuit all with the gas storage device intercommunication.
Further, the pedal brake gas circuit includes:
the wheel braking mechanism is used for executing braking operation under the pushing of the braking liquid;
the boosting pump is used for supplying brake fluid to the wheel braking mechanism under the driving of high-pressure gas;
the air brake valve is arranged between the air storage device and the booster pump, is connected with the brake pedal, and is used for communicating the air storage device with the booster pump and providing high-pressure air into the booster pump when the brake pedal is stepped;
and/or
The parking brake gas circuit includes:
a brake caliper for emergency stop or parking brake;
the brake air chamber is connected with the brake calipers and is used for controlling the brake calipers to act to realize braking after high-pressure air in the brake air chamber is discharged into the atmosphere;
the quick release valve is connected with the button or the hand brake and is arranged between the gas storage device and the brake air chamber and communicated with the brake air chamber through a pipeline, the air inlet of the quick release valve is cut off from the air outlet of the quick release valve under the control of the button or the hand brake, and the air outlet of the quick release valve is communicated with the air outlet of the quick release valve to discharge high-pressure gas in the brake air chamber to the atmosphere;
the parking valve is arranged between the air storage device and the brake air chamber and communicated through a pipeline, when the air pressure in the air storage device is lower than a preset value, the air inlet of the parking valve and the air outlet of the parking valve are automatically cut off, the air outlet of the parking valve is automatically communicated with the air outlet of the parking valve, and high-pressure air in the brake air chamber is discharged to the atmosphere.
Further, the gas compression device is a gas pump.
Further, the rotation speed ratio of the hydraulic motor to the air pump is 1: 1-1: 15.
the utility model discloses a loader has as above loader braking system.
The utility model provides a loader braking system and loader drives gas compression device work through hydraulic pump and hydraulic motor's integrated configuration, for the work of motor drive gas compression device, need not to set up motor, machine controller, power supply module etc. consequently, system architecture is simpler, and the reliability is higher.
The hydraulic pump for driving the hydraulic motor to work is served by the working pump or the walking pump of the loader, extra parts are reduced, the system is simpler, the cost is reduced, and meanwhile, the hydraulic allowance of the working pump or the walking pump in the working process can be utilized, so that the energy consumption of the whole vehicle is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a brake system of a loader provided by an embodiment of the present invention.
Icon: 1-a hydraulic pump; 2-an electromagnetic valve; 3-a hydraulic motor; 4-a transmission mechanism; 5, an air pump; 6-a combination valve; 7-a gas tank; 8-an air brake valve; 9-a booster pump; 10-a wheel braking mechanism; 11-a parking valve; 12-a brake chamber; 13-brake calipers; 14-a quick release valve; 15-a pressure sensor; 16-control circuit.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a loader braking system, including:
the gas storage device is used for storing high-pressure gas;
the gas compression device is connected with the gas storage device and is used for providing compressed gas into the gas storage device;
the hydraulic driving device comprises a hydraulic motor 3 and a hydraulic pump 1 for driving the hydraulic motor 3 to work, wherein the hydraulic motor 3 is in transmission connection with the gas compression device and is used for driving the gas compression device to work.
The gas compression device is driven to work through the combined structure of the hydraulic pump 1 and the hydraulic motor 3, and compared with the work of the gas compression device driven by a motor, the gas compression device is not required to be provided with the motor, a motor controller, a power supply module and the like, so that the system is simpler in structure and higher in reliability.
Further, preferably, the hydraulic pump 1 is a working pump or a traveling pump of a loader, the hydraulic pump 1 for driving the hydraulic motor 3 to work is used as the working pump or the traveling pump of the loader, extra added components are reduced, the system is simpler, the cost is reduced, and meanwhile, the hydraulic allowance of the working pump or the traveling pump in the working process can be utilized, so that the energy consumption of the whole vehicle is reduced.
The hydraulic driving device also comprises a control device for controlling the on-off between the hydraulic pump 1 and the hydraulic motor 3 according to the air pressure in the air storage device.
Preferably, the control device comprises an electromagnetic valve 2 arranged between the hydraulic pump 1 and the hydraulic motor 3, a pressure sensor 15 for detecting air pressure in the air storage device, and a control circuit 16, wherein the control circuit 16 is used for controlling the electromagnetic valve 2 to be opened when the air pressure collected by the pressure sensor 15 is lower than a low-pressure preset value; and when the air pressure acquired by the pressure sensor 15 is higher than or equal to a high-pressure preset value, controlling the electromagnetic valve 2 to be closed.
The control circuit 16 controls the opening or closing of the electromagnetic valve 2 according to the air pressure value detected by the pressure sensor 15 in real time, so as to control whether the hydraulic pump 1 supplies liquid to the hydraulic motor 3, when the electromagnetic valve 2 is opened and the hydraulic pump 1 supplies liquid to the hydraulic motor 3, the hydraulic motor 3 works, so that the gas compression device is driven to work, and high-pressure gas is supplied to the gas storage device; when the electromagnetic valve 2 is closed, the hydraulic pump 1 stops supplying liquid to the hydraulic motor 3, and the gas compression device does not work.
The low-pressure preset value range of the gas pressure in the gas storage device is 0.5-0.65 MP, and the high-pressure preset value range is 0.7-1.2 MP. Preferably, the low pressure preset value is 0.55MP, and the high pressure preset value is 0.75 MP. Such default value can play fine braking effect under the prerequisite that satisfies safety.
The control device can realize the control of the intermittent work of the hydraulic motor and the gas compression device, thereby reducing the energy consumption of the whole vehicle.
As an alternative embodiment, the control device may further include a pressure switch and an electromagnetic valve disposed between the hydraulic pump 1 and the hydraulic motor 3, and when the pressure switch detects that the air pressure in the air storage device exceeds a high-pressure preset value, the pressure switch may output a first electrical signal to control the electromagnetic valve to close; when the pressure switch detects that the air pressure in the air storage device is lower than a low-pressure preset value, the pressure switch can output a second electric signal to control the electromagnetic valve to be opened.
As an alternative embodiment, the control device may further only be provided with a pneumatic switch valve, the pneumatic switch valve is arranged between the hydraulic pump 1 and the hydraulic motor 3 and is connected with the gas storage device, when the gas pressure in the gas storage device exceeds a high-pressure preset value, the high-pressure gas drives the pneumatic switch valve to close, and the liquid supply from the hydraulic pump 1 to the hydraulic motor 3 is stopped; when the air pressure in the air storage device is lower than a low-pressure preset value, the pneumatic switch valve is opened, and the hydraulic pump 1 supplies liquid to the hydraulic motor.
Further, a combination valve 6 is further arranged between the gas compression device and the gas storage device, the combination valve 6 comprises a one-way valve and a relief valve, and the one-way valve is used for preventing gas in the gas storage device from flowing back to the gas storage device; and the discharge valve is used for opening to discharge gas to the atmosphere when the gas pressure in the gas storage device is higher than a protection set value, reducing the gas pressure in the gas storage device and closing when the gas pressure is lower than the protection set value.
Further, loader braking system's brake gas circuit includes pedal brake gas circuit and parking brake gas circuit, the entry of pedal brake gas circuit and parking brake gas circuit all with the gas storage device intercommunication.
Preferably, the service brake air circuit includes:
a wheel brake mechanism 10 for performing a braking operation under the push of brake fluid;
a booster pump 9 for supplying a brake fluid to the wheel brake mechanism 10 under the drive of the high-pressure gas;
the air brake valve 8 is arranged between the air storage device and the booster pump 9, is connected with the brake pedal, and is used for communicating the air storage device with the booster pump 9 when the brake pedal is stepped on so as to provide high-pressure air for the booster pump 9;
the parking brake gas circuit includes:
a brake caliper 13 for emergency stop or parking brake;
the brake air chamber 12 is connected with the brake caliper 13 and is used for controlling the brake caliper 13 to act to realize braking after high-pressure air in the brake air chamber is discharged into the atmosphere;
the quick release valve 14 is connected with the button or the hand brake and is arranged between the gas storage device and the brake air chamber 12 and communicated through a pipeline, the air inlet of the quick release valve 14 and the air outlet of the quick release valve 14 are cut off under the control of the button or the hand brake, and the air outlet of the quick release valve 14 is communicated with the air outlet of the quick release valve 14 to discharge high-pressure gas in the brake air chamber 12 to the atmosphere;
the parking valve 11 is arranged between the air storage device and the brake air chamber 12 and communicated through a pipeline, when the air pressure in the air storage device is lower than a preset value, the air inlet of the parking valve 11 and the air outlet of the parking valve 11 are automatically cut off, the air outlet of the parking valve 11 is automatically communicated with the air outlet of the parking valve 11, and high-pressure air in the brake air chamber 12 is exhausted to the atmosphere.
In the parking brake air path, the quick release valve 14 and the parking valve 11 are connected in the parking brake air path in various ways, and can be formed by connecting an air storage device, the quick release valve 14, the parking valve 11, the brake air chamber 12 and the brake caliper 13 in series through pipelines, or formed by connecting the air storage device, the parking valve 11, the quick release valve 14, the brake air chamber 12 and the brake caliper 13 in series through pipelines as shown in fig. 1; the parking valve 11 and the quick release valve 14 can also be connected in parallel between the air storage device and the brake air chamber 12 through a pipeline.
For the pedal brake air path, when the driver steps on the brake pedal, the air brake valve 8 acts to open the air path channel from the air storage device to the booster pump 9. The high-pressure gas in the gas storage device enters the booster pump 9 through the air brake valve 8 and pushes the brake fluid in the booster pump 9 to enter the wheel brake mechanism 10. The wheel brake mechanism 10 performs a braking operation under the urging of the brake fluid. When the driver releases the brake pedal, the air brake valve 8 is closed, the high-pressure gas in the booster pump 9 is discharged to the atmosphere, the brake fluid is returned from the wheel brake mechanism 10, and the vehicle brake mechanism is returned.
For the parking brake air path, a driver can operate the quick release valve 14 to open through a button or a hand brake in a cab, the quick release valve 14 is opened to discharge high-pressure air in the brake air chamber 12 to the atmosphere, and therefore the brake caliper is operated, and the emergency stop or the operation intention of the parking brake is realized. When the spare part of braking system became invalid, caused the gas storage device insufficient pressure, the case of parking valve 11 moved to the gas outlet of parking valve 11 under the effect of spring force and with the gas vent of parking valve 11 communicates, discharges the gas in brake chamber 12 to the atmosphere to realize the automatic shutdown of system, guarantee system and personnel's safety.
In the present embodiment, the gas compression means is preferably a gas pump 5. The gas storage device can be preferably a gas tank 7, the hydraulic motor 3 is connected with the gas pump 5 through a transmission mechanism 4, the transmission mechanism 4 is connected with an output shaft of the hydraulic motor 3 and a power input shaft of the gas pump 5, and the transmission mechanism 4 can be in various structures, for example, the transmission mechanism is arranged in a belt pulley structure or a gear set structure, and a simple spline structure can be adopted for transmission. The arrangement of the transmission mechanism 4 can realize that the output speed of the hydraulic motor 3 is increased and then is transmitted to the air pump 5, so that the rotating speed transmitted to the air pump 5 meets the rotating speed requirement of the air pump. Generally, the rotation speed ratio of the hydraulic motor 3 to the air pump 5 is 1:1 to 1: 15. the ratio of the rotation speed of the hydraulic motor 3 and the air pump 5 is preferably 1: 4. By setting the rotation speed ratio between the hydraulic motor 3 and the air pump 5, the time for increasing high-pressure air into the air tank 7 can be shortened, and the working safety can be guaranteed.
The air pump 5 mainly comprises a power input shaft, an air inlet channel, an air compression mechanism and an air outlet channel. The power input shaft drives the gas compression mechanism to compress gas sucked from the gas inlet channel to obtain high-pressure gas, and the high-pressure gas is discharged through the gas outlet channel, and the gas outlet channel is connected with the gas tank 7 through the combination valve.
The utility model provides a pair of loader has as above loader braking system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A loader braking system, comprising:
the gas storage device is used for storing high-pressure gas;
the gas compression device is connected with the gas storage device and is used for providing compressed gas into the gas storage device;
the hydraulic driving device comprises a hydraulic motor (3) and a hydraulic pump (1) for driving the hydraulic motor (3) to work, wherein the hydraulic motor (3) is in transmission connection with the gas compression device and is used for driving the gas compression device to work.
2. Brake system for a loader as claimed in claim 1 wherein the hydraulic motor (3) is the working or walking pump of the loader.
3. The brake system of a loader as claimed in claim 1 or 2 wherein the hydraulic drive further comprises a control device for controlling the connection and disconnection between the hydraulic pump (1) and the hydraulic motor (3) according to the air pressure in the air reservoir.
4. The loader braking system according to claim 3 wherein the control means comprise a solenoid valve (2) arranged between the hydraulic pump (1) and the hydraulic motor (3), a pressure sensor (15) for detecting the air pressure in the air reservoir, and a control circuit (16), the control circuit (16) being adapted to control the solenoid valve (2) to open when the air pressure detected by the pressure sensor (15) is lower than a preset low pressure value; and when the air pressure collected by the pressure sensor (15) is higher than or equal to a high-pressure preset value, controlling the electromagnetic valve (2) to be closed.
5. The brake system of the loader as claimed in claim 1 or 2, wherein a combination valve (6) is further disposed between the gas compression device and the gas storage device, the combination valve (6) comprises a check valve and a relief valve, and the check valve is used for preventing the gas in the gas storage device from flowing back to the gas storage device; and the discharge valve is used for opening to discharge gas to the atmosphere when the air pressure in the air storage device is higher than a protection set value, and closing when the air pressure is lower than the protection set value.
6. The loader braking system according to claim 1 or 2, wherein the brake air path of the loader braking system includes a foot brake air path and a parking brake air path, and inlets of the foot brake air path and the parking brake air path are both communicated with the air storage device.
7. The loader brake system of claim 6, wherein the service brake air circuit comprises:
the wheel braking mechanism (10) is used for executing braking operation under the pushing of the braking liquid;
a booster pump (9) for supplying a brake fluid to the wheel brake mechanism (10) under the drive of the high-pressure gas;
the air brake valve (8) is arranged between the air storage device and the booster pump (9), is connected with the brake pedal, and is used for communicating the air storage device with the booster pump (9) when the brake pedal is stepped on so as to provide high-pressure air into the booster pump (9);
and/or
The parking brake gas circuit includes:
a brake caliper (13) for emergency or parking braking;
the brake air chamber (12) is connected with the brake caliper (13) and is used for controlling the brake caliper (13) to act to realize braking after high-pressure air in the brake air chamber is discharged into the atmosphere;
the quick release valve (14) is connected with the button or the hand brake and is arranged between the gas storage device and the brake air chamber (12) and communicated through a pipeline, the air inlet of the quick release valve (14) and the air outlet of the quick release valve (14) are cut off under the control of the button or the hand brake, the air outlet of the quick release valve (14) is communicated with the air outlet of the quick release valve (14), and high-pressure gas in the brake air chamber (12) is exhausted to the atmosphere;
the parking valve (11) is arranged between the gas storage device and the brake air chamber (12) and communicated through a pipeline, when the air pressure in the gas storage device is lower than a preset value, an air inlet of the parking valve (11) and an air outlet of the parking valve (11) are automatically cut off, the air outlet of the parking valve (11) is automatically communicated with an air outlet of the parking valve (11), and high-pressure gas in the brake air chamber (12) is exhausted to the atmosphere.
8. The loader braking system according to claim 1 or 2, characterized in that the gas compression device is a gas pump (5).
9. The loader brake system of claim 8, wherein the ratio of the rotation speed of the hydraulic motor (3) to the rotation speed of the air pump (5) is 1: 1-1: 15.
10. a loader having a loader brake system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121316733.8U CN213676636U (en) | 2021-06-15 | 2021-06-15 | Loader braking system and loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121316733.8U CN213676636U (en) | 2021-06-15 | 2021-06-15 | Loader braking system and loader |
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| Publication Number | Publication Date |
|---|---|
| CN213676636U true CN213676636U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121316733.8U Active CN213676636U (en) | 2021-06-15 | 2021-06-15 | Loader braking system and loader |
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| CN (1) | CN213676636U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113370957A (en) * | 2021-08-16 | 2021-09-10 | 北京晟科网鼎网络科技有限公司 | Braking force distribution control method, braking system and braking method for electric loader |
-
2021
- 2021-06-15 CN CN202121316733.8U patent/CN213676636U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113370957A (en) * | 2021-08-16 | 2021-09-10 | 北京晟科网鼎网络科技有限公司 | Braking force distribution control method, braking system and braking method for electric loader |
| CN113370957B (en) * | 2021-08-16 | 2021-11-02 | 北京晟科网鼎网络科技有限公司 | Braking force distribution control method, braking system and braking method for electric loader |
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