CN210760727U - Automatic gear-breaking system for brake of loader - Google Patents
Automatic gear-breaking system for brake of loader Download PDFInfo
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- CN210760727U CN210760727U CN201921427052.1U CN201921427052U CN210760727U CN 210760727 U CN210760727 U CN 210760727U CN 201921427052 U CN201921427052 U CN 201921427052U CN 210760727 U CN210760727 U CN 210760727U
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Abstract
The utility model discloses a loader braking automatic gear-breaking system, it belongs to engineering machine tool technical field. The loading machine solves the defects that the performance attenuation of a brake system is aggravated due to misoperation and the parking brake fails due to long-time or frequent misoperation in the traditional loading machine braking gear-breaking function in the prior art. The main structure of the automatic gear-breaking parking brake system comprises a parking brake valve, a two-position three-way direction control valve and a speed change valve air valve body, wherein the two-position three-way direction control valve is respectively connected with the parking brake valve and the speed change valve air valve body. The utility model discloses mainly used engineering machine tool such as loader.
Description
The technical field is as follows:
the utility model belongs to the technical field of engineering machine tool, specifically speaking especially relates to a loader braking automatic gear-breaking system.
Background art:
the brake system is used for reducing the speed or stopping when the loader runs and stopping on flat ground or a slope for a long time, the working condition of the loader is severe, and the loader needs to be matched with the brake system to realize frequent forward movement, backward movement or stopping in the working process. Because the performance of the brake system is directly related to the life safety of a driver and the normal work of the whole machine, the reliability and the safety of the brake are particularly important. During actual work, a driver performs misoperation due to reasons such as negligence, drives on the premise of not releasing parking brake, performance attenuation of a brake system can be aggravated in a short time, and long-time or frequent misoperation can cause parking brake failure, such as brake pad abrasion, brake burnout and other faults.
At present, the brake gear-breaking function of the domestic loader mainly comprises the following functions: 1. the electric control box is solved through an electric control scheme, for example, associated function logic, when the electric control box is used for braking in a driving mode and parking, electric signals are transmitted to the whole machine control unit, and the control unit judges whether gear breaking is executed or not according to set logic. 2. The non-electric control gearbox needs to be combined with a brake system for composite design, a gas-liquid comprehensive brake system is mostly adopted by a loader, the gearbox also comprises a speed change valve with two modes of ventilation gear-breaking and gas-off gear-breaking, the speed change valve with the gas-off gear-breaking mode is synchronous with a parking brake actuating mechanism on the basis of realizing a brake gear-breaking strategy, and the speed change valve with the ventilation gear-breaking mode has wide gear-breaking application during driving brake and is mainly associated with the speed change valve through a foot brake valve, namely, the driving gear-breaking is realized; the ventilation gear-off speed-changing valve has a gear-shifting logic opposite to a parking braking logic, and in actual production, the application of realizing parking gear-off on the speed-changing valve in a ventilation gear-off mode is less, and a sound-light alarm form is mostly adopted for prompting.
Although the electric control box is solved through an electric control scheme, the electric control box is required on the premise that the application has certain limitation; the speed change valve in the gas-off and gear-off mode is not difficult to realize in terms of realizing a braking gear-off strategy, but the application range of the gas-off and gear-off speed change valve is not wide; at present, when a speed change valve in a ventilation gear-off mode is used for parking and braking, an audible and visual alarm mode can be adopted for prompting, but if the sound of a machine is too loud, the phenomenon of misoperation can be avoided.
The invention content is as follows:
the to-be-solved technical problem of the utility model is overcome prior art not enough, provide a loader braking automatic gear-breaking system, it has realized that the driver when the operation, in case carry out service brake or parking braking operation, can the automatic cutout gear, cut off gearbox power take off, reaches the purpose that promotes braking performance.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model provides a loader braking automatic gear-off system, includes the automatic gear-off system of parking braking, the automatic gear-off system of parking braking includes parking brake valve, two tee bend direction control valves and change valve air valve body, two tee bend direction control valves are connected with parking brake valve and change valve air valve body respectively.
Preferably, the loader braking automatic gear-breaking system further comprises a service braking automatic gear-breaking system, the service braking automatic gear-breaking system comprises an air brake valve, a gear-breaking switch valve and a shuttle valve, the gear-breaking switch valve is respectively connected with air inlets b at one ends of the air brake valve and the shuttle valve, an air inlet a at the other end of the shuttle valve is connected with a two-position three-way direction control valve, and an air outlet of the shuttle valve is connected with an air valve body of a speed change valve.
Preferably, the parking brake automatic gear-off system further comprises a parking brake air chamber and a parking brake, wherein one end of the parking brake air chamber is connected with the parking brake valve, and the other end of the parking brake air chamber is connected with the parking brake.
Preferably, the two-position three-way directional control valve is a pneumatic control stop valve or a pneumatic solenoid valve.
The loader braking automatic gear-breaking system comprises a service braking automatic gear-breaking system, wherein the service braking automatic gear-breaking system comprises an air brake valve, a gear-breaking switch valve and a speed change valve air valve body, and the gear-breaking switch valve is respectively connected with the air brake valve and the speed change valve air valve body.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model can realize automatic gear-off operation no matter the service brake or the parking brake is adopted;
2. the utility model discloses to current model, install simple, the cost is lower additional, can effectively promote braking capability, effectively slow down the decay of parking brake braking capability.
Description of the drawings:
fig. 1 is a hydraulic schematic diagram of the present invention.
In the figure: 1. an air brake valve; 2. a gear-off switch valve; 3. a shuttle valve; 4. a transmission valve air valve body; 5. a pneumatic control stop valve; 6. a parking brake chamber; 7. a parking brake; 8. a parking brake valve.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Example 1:
as shown in figure 1, the automatic gear-breaking system for loader braking comprises a parking braking automatic gear-breaking system, wherein the parking braking automatic gear-breaking system comprises a parking braking valve 8, a two-position three-way directional control valve and a speed change valve air valve body 4, a port c of the parking braking valve 8 is connected with an end e of the two-position three-way directional control valve, a port h of the parking braking valve 8 is communicated with an air storage cylinder pressure air source B after being connected with an air inlet g of the two-position three-way directional control valve in parallel, and the on-off of the air source of the speed change valve air valve body 4 is controlled through the two-position three-way directional control. The lower oil inlet D of the speed change valve air valve body 4 is connected with a gear-shifting speed-changing oil inlet source, and the upper oil outlet is connected with each gear-shifting mechanism.
Example 2:
a loader braking automatic gear-breaking system also comprises a service braking automatic gear-breaking system, wherein the service braking automatic gear-breaking system comprises an air brake valve 1, a gear-breaking switch valve 2, a shuttle valve 3 and a speed change valve air valve body 4 which is the same with the parking braking automatic gear-breaking system in part, an n port of the gear-breaking switch valve 2 is connected with a p port of the air brake valve 1, an m port is connected with an air inlet b at one end of the shuttle valve 3, an air inlet a at the other end of the shuttle valve 3 is connected with an f port of a two-position three-way direction control valve, and an air outlet of the shuttle valve 3 is connected with the speed change valve air valve body 4; the port p of the air brake valve 1 is also communicated with a service brake loop A, and the port r is communicated with an air reservoir pressure air source B.
The parking brake automatic gear-off system further comprises a parking brake air chamber 6 and a parking brake 7, wherein the d end of the parking brake air chamber 6 is connected with the port c of the parking brake valve 8, and the k end of the parking brake air chamber is connected with the parking brake 7; the two-position three-way directional control valve is a pneumatic control stop valve 5 or a pneumatic solenoid valve. The other portions are the same as in example 1.
Example 3:
the automatic gear-breaking system for the brake of the loader comprises a service brake automatic gear-breaking system, wherein the service brake automatic gear-breaking system comprises an air brake valve 1, a gear-breaking switch valve 2 and a speed change valve air valve body 4, and the gear-breaking switch valve 2 is respectively connected with the air brake valve 1 and the speed change valve air valve body 4.
The utility model discloses a theory of operation does:
the utility model takes the two-position three-way directional control valve as the pneumatic control stop valve 5 as an example for explanation, when the loader performs braking operation in the process of driving or operation, the loader transmits pressure air to the driving braking loop A all the way by stepping on the pedal of the pneumatic braking valve 1, and the pressure air is applied to the driving brake to realize braking; and the other path is used for realizing the automatic gear-off function. When the gear is cut off during the driving brake, whether the gear-breaking function is used or not is selected through the gear-breaking switch valve 2, if the gear-breaking switch valve 2 is closed, the automatic gear-breaking function of the driving brake is not used, if the gear-breaking switch valve 2 is opened (the m port is communicated with the n port), during the driving brake, pressure air acts on the air valve body 4 of the speed change valve after passing through the air brake valve 1, the gear-breaking switch valve 2 and the shuttle valve 3, and the gear-breaking switching function of the speed change valve is realized; when the brake pedal of the air brake valve 1 is released, the brake is released, the air valve body 4 of the speed change valve returns, and the gear-off action is finished.
When the loader performs parking brake operation, the two processes are divided into: firstly, in a parking braking state, pressure air directly acts on an air valve body 4 of a speed change valve after passing through an air control stop valve 5 and a shuttle valve 3, and the speed change valve is in a gear-off state, so that a driver cannot walk even if the driver is in gear; secondly, in the parking brake release state, the parking brake valve 8 works, on one hand, the parking brake 7 is pushed to release the brake through the parking brake air chamber 6, on the other hand, the pneumatic control stop valve 5 is controlled to act, so that the air valve body 4 of the speed change valve returns, and the gear-off action is finished.
Claims (5)
1. A loader braking automatic gear-off system is characterized in that: the automatic gear-breaking system comprises a parking brake valve (8), a two-position three-way direction control valve and a speed change valve air valve body (4), wherein the two-position three-way direction control valve is respectively connected with the parking brake valve (8) and the speed change valve air valve body (4).
2. The loader brake automatic gear-off system of claim 1 wherein: the loader braking automatic gear-breaking system further comprises a service braking automatic gear-breaking system, the service braking automatic gear-breaking system comprises an air brake valve (1), a gear-breaking switch valve (2) and a shuttle valve (3), the gear-breaking switch valve (2) is respectively connected with one end air inlet b of the air brake valve (1) and the shuttle valve (3), the other end air inlet a of the shuttle valve (3) is connected with a two-position three-way direction control valve, and an air outlet of the shuttle valve (3) is connected with a speed change valve air valve body (4).
3. The loader brake automatic gear-off system according to claim 1 or 2, characterized in that: the automatic gear-breaking system for parking braking further comprises a parking braking air chamber (6) and a parking brake (7), wherein one end of the parking braking air chamber (6) is connected with a parking braking valve (8), and the other end of the parking braking air chamber is connected with the parking brake (7).
4. The loader brake automatic gear-off system of claim 3 wherein: the two-position three-way directional control valve is a pneumatic control stop valve (5) or a pneumatic solenoid valve.
5. A loader braking automatic gear-off system is characterized in that: the loader braking automatic gear-breaking system comprises a service braking automatic gear-breaking system, the service braking automatic gear-breaking system comprises an air brake valve (1), a gear-breaking switch valve (2) and a speed change valve air valve body (4), and the gear-breaking switch valve (2) is connected with the air brake valve (1) and the speed change valve air valve body (4) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921427052.1U CN210760727U (en) | 2019-08-29 | 2019-08-29 | Automatic gear-breaking system for brake of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921427052.1U CN210760727U (en) | 2019-08-29 | 2019-08-29 | Automatic gear-breaking system for brake of loader |
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| Publication Number | Publication Date |
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| CN210760727U true CN210760727U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921427052.1U Active CN210760727U (en) | 2019-08-29 | 2019-08-29 | Automatic gear-breaking system for brake of loader |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198497A (en) * | 2021-12-21 | 2022-03-18 | 苏州亚太金属有限公司 | Gear shifting control valve group for hybrid power gearbox of off-highway mine car and control method thereof |
| CN114802148A (en) * | 2022-03-23 | 2022-07-29 | 特速安(浙江)机电科技有限公司 | Hydraulic auxiliary brake control system of explosion-proof trackless rubber-tyred vehicle |
-
2019
- 2019-08-29 CN CN201921427052.1U patent/CN210760727U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198497A (en) * | 2021-12-21 | 2022-03-18 | 苏州亚太金属有限公司 | Gear shifting control valve group for hybrid power gearbox of off-highway mine car and control method thereof |
| CN114198497B (en) * | 2021-12-21 | 2022-08-30 | 苏州亚太精睿传动科技股份有限公司 | Gear shifting control valve group for hybrid power gearbox of off-highway mine car and control method thereof |
| CN114802148A (en) * | 2022-03-23 | 2022-07-29 | 特速安(浙江)机电科技有限公司 | Hydraulic auxiliary brake control system of explosion-proof trackless rubber-tyred vehicle |
| CN114802148B (en) * | 2022-03-23 | 2023-08-25 | 特速安(浙江)机电科技有限公司 | Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle |
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