CN109809332B - Fork truck braking system - Google Patents
Fork truck braking system Download PDFInfo
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- CN109809332B CN109809332B CN201910110752.6A CN201910110752A CN109809332B CN 109809332 B CN109809332 B CN 109809332B CN 201910110752 A CN201910110752 A CN 201910110752A CN 109809332 B CN109809332 B CN 109809332B
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Abstract
The application discloses a forklift braking system, which comprises a service braking pipeline, a parking braking pipeline and a parking braking release pipeline, wherein the parking braking pipeline comprises a braking pump and a parking brake communicated with an oil outlet of the braking pump through a pipeline; the service brake pipeline comprises a brake pump and a service brake communicated with an oil outlet of the brake pump through a pipeline; the parking brake release pipeline comprises a brake pump and a parking brake communicated with an oil outlet of the brake pump through a pipeline, and the brake pump is in one-way conduction with the parking brake, so that the beneficial effects of the application are that: the application can effectively provide service brake, parking brake and parking brake release in emergency for the vehicle by arranging the service brake pipeline, the parking brake pipeline and the parking brake release pipeline, and has simple structure, small change to the original brake system, low cost and high cost performance.
Description
Technical Field
The application relates to the technical field of forklift equipment, in particular to a forklift braking system.
Background
The forklift braking system consists of two parts, namely a service braking device and a parking braking device, wherein the service braking device is used for decelerating or stopping a running forklift and is also called a foot braking device; parking brake devices are devices that ensure that a vehicle is reliably held in place, also known as hand brake devices. Service brakes are typically incorporated into the drive wheels; the parking brake is mounted on the gearbox and in the drive wheel. The service brake and the parking brake are respectively controlled by two sets of driving transmission mechanisms, and are controlled hydraulically and mechanically. When the power source works, the hydraulic control parking brake device releases the brake; when the power source stops working, the braking is implemented, and when the forklift is stopped in place or on a slope due to faults, the parking braking cannot be released, so that the forklift cannot move under control or slowly descends.
Disclosure of Invention
The application aims to provide a forklift braking system for solving the problems in the background art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the forklift braking system comprises a service braking pipeline, a parking braking pipeline and a parking braking release pipeline, wherein the parking braking pipeline comprises a braking pump and a parking brake communicated with an oil outlet of the braking pump through a pipeline; the service brake pipeline comprises a brake pump and a service brake communicated with an oil outlet of the brake pump through a pipeline; the parking brake release pipeline comprises a brake pump and a parking brake communicated with an oil outlet of the brake pump through a pipeline, the brake pump is in one-way conduction with the parking brake, and the service brake pipeline and the parking brake pipeline are not simultaneously communicated.
As a further scheme of the application: an oil inlet of the brake pump is communicated with the oil tank, an oil outlet of the brake pump is connected with an overflow valve, and an oil outlet of the overflow valve is communicated with the oil tank.
As a further scheme of the application: the emergency switch valve is a two-position four-way manual reversing valve and comprises an oil inlet D, an oil inlet E, an oil outlet F and an oil outlet G.
As a further scheme of the application: the emergency switch valve is provided with a manual transposition ejector rod.
As a further scheme of the application: and a one-way valve is arranged between the oil inlet E and the oil outlet F when the emergency switch valve is in a direction changing state.
As a further scheme of the application: the oil outlet F on the emergency switch valve is communicated with parking brakes arranged on two sides of the wheel through a first three-way pipe, and the oil outlet G on the emergency switch valve is communicated with service brakes arranged on two sides of the wheel through a second three-way pipe.
As a further scheme of the application: the brake pump and the parking brake in the parking brake pipeline are provided with electromagnetic directional valves, the electromagnetic directional valves are two-position three-way valves, and the electromagnetic directional valves are provided with an oil inlet A, an oil outlet B and an oil outlet C.
As a further scheme of the application: the rear end of the oil outlet of the brake pump is communicated with an oil inlet A of the electromagnetic directional valve through a pipeline, and an oil outlet B on the electromagnetic directional valve is communicated with an oil inlet D on the emergency switch valve through a pipeline.
As a further scheme of the application: and an oil outlet of the brake pump is communicated with an oil inlet E on the emergency switch valve through a pipeline.
Compared with the prior art, the application has the beneficial effects that: the application can effectively provide service brake, parking brake and parking brake release in emergency for the vehicle by arranging the service brake pipeline, the parking brake pipeline and the parking brake release pipeline, and has simple structure, small change to the original brake system, low cost and high cost performance.
Drawings
Fig. 1 is a schematic diagram of a forklift brake system according to the present application.
In the figure: 1-oil tank, 2-oil pump, 3-overflow valve, 4-solenoid directional valve, 5-emergency switch valve, 6-service brake, 7-parking brake, 8-brake pump, 9-first three-way pipe, 10-second three-way pipe, 11-check valve, 12-manual transposition ejector pin.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, in the embodiment of the application, a forklift braking system comprises an oil tank 1, an oil pump 2, an overflow valve 3, an electromagnetic directional valve 4, an emergency switch valve 5, a service brake 6, a parking brake 7 and a brake pump 8, wherein three hydraulic pipelines are formed by connecting all the components through pipelines, namely a service brake pipeline, a parking brake pipeline and a parking brake release pipeline, the electromagnetic directional valve 4 is a two-position three-way valve, an oil inlet A, an oil outlet B and an oil outlet C are arranged on the electromagnetic directional valve 4, the emergency switch valve 5 is a two-position four-way manual directional valve, and the emergency switch valve 5 comprises an oil inlet D, an oil inlet E, an oil outlet F and an oil outlet G;
the parking brake pipeline comprises an oil tank 1 and an oil pump 2 which are sequentially connected, an electromagnetic directional valve 4, an emergency switch valve 5 and a parking brake 7, wherein an oil inlet of the oil pump 2 is communicated with the oil tank 1 through a pipeline, an oil outlet of the oil pump 2 is communicated with an oil inlet A of the electromagnetic directional valve 4 through a pipeline, meanwhile, an overflow valve 3 is also connected at the oil outlet of the oil pump 2, the oil outlet of the overflow valve 3 is communicated with the oil tank through a pipeline, when the electromagnetic directional valve 4 is in a gear shifting position, the oil inlet A is communicated with an oil outlet B, when the electromagnetic directional valve 4 is in a neutral position, the oil inlet A is interrupted, the oil outlet B is communicated with an oil outlet C, the oil outlet C is communicated with the oil tank 1 through a pipeline, the oil outlet B is communicated with an oil inlet D on the emergency switch valve 5, and when the oil outlet F is communicated with the parking brake 7 arranged on two sides through a first three-way pipe 9, and then the oil pump 2 can pump hydraulic oil into the parking brake 7 to release the parking brake of a vehicle;
the service brake pipeline comprises a brake pump 8, an emergency switch valve 5 and a service brake 6 which are sequentially connected, an oil outlet of the brake pump 8 is communicated with an oil inlet E of the emergency switch valve 5 through a pipeline, when the emergency switch valve 5 is in a neutral position, the oil inlet E is communicated with an oil outlet G, and the oil outlet G is communicated with the service brakes 6 arranged on two sides of the wheel through a second three-way pipe 10, so that high-pressure oil can be pumped into the service brakes 6 when the brake pump 8 is stepped on, and the vehicle has braking capability in the running process;
the parking brake release pipeline comprises a brake pump 8, an emergency switch valve 5 and a parking brake 7 which are sequentially connected, wherein a manual transposition ejector rod 12 is arranged on the emergency switch valve 5, the emergency switch valve 5 can be switched from the middle position to the reversing position through the manual transposition ejector rod 12, in addition, a one-way valve 11 is arranged in the emergency switch valve 5, when the emergency switch valve 5 is in the reversing position, an oil inlet E and an oil outlet F are in one-way conduction, so that the high-pressure oil flows out from the oil outlet of the brake pump 8 and flows into the oil inlet E of the emergency switch valve 5 through the pipeline at the moment, then enters the parking brake 7 through the one-way valve 11 and the oil outlet F, and the parking brake of a vehicle can be released, so that the vehicle can still move or slowly descend when in a fault.
When the vehicle is started, the oil pump 2 is started, the electromagnetic directional valve 4 is electrified to be converted into a directional position, the emergency switch valve is in the neutral position, at the moment, the oil pump 2 outputs high-pressure oil, the high-pressure oil enters the oil inlet A of the electromagnetic directional valve 4 and then enters the oil inlet D on the emergency switch valve 5 through the oil outlet B, the high-pressure oil enters the parking brake 7 through the oil outlet F on the emergency switch valve 5 and the first three-way pipe 9, thus the parking brake is released, the vehicle can move, when the vehicle is stopped, the oil pump 2 is stopped, the electromagnetic directional valve 4 is in a power-off state, at the moment, the oil outlet B is communicated with the oil outlet C, the high-pressure oil in the parking brake 7 flows back into the oil tank 1 through the first three-way pipe 9, the oil outlet F and the oil inlet D on the emergency switch valve 5, the oil outlet B and the oil outlet C on the electromagnetic directional valve 4, when the vehicle fails and cannot be started, the oil pump 2 and the electromagnetic reversing valve 4 are powered off, so that the parking brake 7 is in a braking state, if the vehicle needs to be moved, the braking state of the vehicle needs to be relieved, at the moment, the emergency switching valve 5 is converted to a reversing position through the manual reversing ejector rod 12 on the emergency switching valve 5, at the moment, the oil inlet E and the oil outlet F are in one-way conduction, then the brake pump 8 is stepped, high-pressure oil is provided through the brake pump 8, the high-pressure oil sequentially enters the parking brake 7 through the oil inlet E and the oil outlet F, the parking brake state of the vehicle is relieved, so that the vehicle is conveniently moved, and when the parking brake needs to be carried out again, only the emergency switching valve 5 needs to be restored to the neutral position, at the moment, the high-pressure oil in the parking brake 7 passes through the first three-way pipe 9, the oil outlet F and the oil inlet D on the emergency switching valve 5, the oil outlet B and the oil outlet C on the electromagnetic directional valve 4 flow back into the oil tank 1, so that the vehicle is restored to the parking brake;
in the running process of the vehicle, when the vehicle is required to be braked, the brake pump 8 is trampled, high-pressure oil is increased through the brake pump 8, then the high-pressure oil enters the service brakes 6 on the two sides of the wheel through the oil inlet E and the oil outlet G on the emergency switch valve 5 and the second three-way pipe 10, and further service braking can be provided for the vehicle.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The forklift braking system is characterized by comprising a service braking pipeline, a parking braking pipeline and a parking braking release pipeline, wherein the parking braking pipeline comprises an oil pump (2) and a parking brake (7) communicated with an oil outlet of the oil pump (2) through a pipeline; the service brake pipeline comprises a brake pump (8) and a service brake (6) communicated with an oil outlet of the brake pump (8) through a pipeline; the parking brake release pipeline comprises a brake pump (8) and a parking brake (7) communicated with an oil outlet of the brake pump (8) through a pipeline, wherein the brake pump (8) is in one-way conduction with the parking brake (7), and the service brake pipeline and the parking brake pipeline are not simultaneously connected;
the automatic braking device is characterized in that an emergency switch valve (5) is arranged in a vehicle braking pipeline, a parking braking pipeline and a parking braking release pipeline, the emergency switch valve (5) is a two-position four-way manual reversing valve, the emergency switch valve (5) comprises an oil inlet D, an oil inlet E, an oil outlet F and an oil outlet G, a manual transposition ejector rod (12) is arranged on the emergency switch valve (5), a one-way valve (11) is arranged between the oil inlet E and the oil outlet F when the emergency switch valve (5) is in a reversing position, the oil outlet F on the emergency switch valve (5) is communicated with a parking brake (7) arranged on two sides of a wheel through a first three-way pipe (9), the oil outlet G on the emergency switch valve (5) is communicated with a traveling brake (6) arranged on two sides of the wheel through a second three-way pipe (10), the oil pump (2) and the parking brake (7) are provided with an electromagnetic reversing valve (4), the electromagnetic reversing valve (4) is a two-position three-way valve, and the electromagnetic reversing valve (4) is provided with an A and an oil inlet C and an oil outlet (4) through the electromagnetic reversing valve (4) on the reversing valve (4) and the oil inlet B is communicated with the oil inlet (4) through the electromagnetic reversing valve (4).
2. A forklift braking system according to claim 1, characterized in that the oil inlet of the oil pump (2) is in communication with the oil tank (1), the oil outlet of the oil pump (2) is connected with an overflow valve (3), and the oil outlet of the overflow valve (3) is in communication with the oil tank (1).
3. A forklift brake system according to claim 1, characterized in that the oil outlet of the brake pump (8) communicates with the oil inlet E on the emergency switch valve (5) via a pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910110752.6A CN109809332B (en) | 2019-02-12 | 2019-02-12 | Fork truck braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910110752.6A CN109809332B (en) | 2019-02-12 | 2019-02-12 | Fork truck braking system |
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| Publication Number | Publication Date |
|---|---|
| CN109809332A CN109809332A (en) | 2019-05-28 |
| CN109809332B true CN109809332B (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910110752.6A Active CN109809332B (en) | 2019-02-12 | 2019-02-12 | Fork truck braking system |
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| Country | Link |
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| CN (1) | CN109809332B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126800B (en) * | 2019-05-29 | 2024-07-12 | 安徽合力股份有限公司 | Reversing control valve for forklift electronic parking braking and unlocking functions |
| CN112660090B (en) * | 2020-12-31 | 2022-09-23 | 三一汽车制造有限公司 | Emergency control system and electrically driven vehicle |
Citations (9)
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| GB1410193A (en) * | 1972-04-14 | 1975-10-15 | Lancer Boss Ltd | Hydraulic control circuits |
| JPH0635067U (en) * | 1992-10-19 | 1994-05-10 | 株式会社豊田自動織機製作所 | forklift |
| DE102005025650A1 (en) * | 2005-06-03 | 2006-12-07 | Linde Ag | Industrial truck with hydraulically operated spring brake, connected to hydraulic steering system in case of failure |
| DE102008012708A1 (en) * | 2008-03-05 | 2009-09-10 | Linde Material Handling Gmbh | Work vehicle with parking brake |
| CN202624350U (en) * | 2012-04-05 | 2012-12-26 | 昆山晋桦豹胶轮车制造有限公司 | Control system for correcting vehicle head and removing brake by pumping oil through hand pump |
| JP2017211086A (en) * | 2016-05-24 | 2017-11-30 | ジーケイエヌ・オートモーティブ・リミテッド | System for activating parking brake |
| JP6299837B1 (en) * | 2016-10-20 | 2018-03-28 | マツダ株式会社 | Parking brake control device |
| CN108331791A (en) * | 2018-02-02 | 2018-07-27 | 安徽合力股份有限公司 | A kind of hydraulic system released without decompression valve type fork-lift truck stopping brake |
| CN109249918A (en) * | 2018-09-26 | 2019-01-22 | 三汽车制造有限公司 | Brake fluid system and vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210176389U (en) * | 2019-02-12 | 2020-03-24 | 安徽合力股份有限公司 | Forklift braking system |
-
2019
- 2019-02-12 CN CN201910110752.6A patent/CN109809332B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1410193A (en) * | 1972-04-14 | 1975-10-15 | Lancer Boss Ltd | Hydraulic control circuits |
| JPH0635067U (en) * | 1992-10-19 | 1994-05-10 | 株式会社豊田自動織機製作所 | forklift |
| DE102005025650A1 (en) * | 2005-06-03 | 2006-12-07 | Linde Ag | Industrial truck with hydraulically operated spring brake, connected to hydraulic steering system in case of failure |
| DE102008012708A1 (en) * | 2008-03-05 | 2009-09-10 | Linde Material Handling Gmbh | Work vehicle with parking brake |
| CN202624350U (en) * | 2012-04-05 | 2012-12-26 | 昆山晋桦豹胶轮车制造有限公司 | Control system for correcting vehicle head and removing brake by pumping oil through hand pump |
| JP2017211086A (en) * | 2016-05-24 | 2017-11-30 | ジーケイエヌ・オートモーティブ・リミテッド | System for activating parking brake |
| JP6299837B1 (en) * | 2016-10-20 | 2018-03-28 | マツダ株式会社 | Parking brake control device |
| CN108331791A (en) * | 2018-02-02 | 2018-07-27 | 安徽合力股份有限公司 | A kind of hydraulic system released without decompression valve type fork-lift truck stopping brake |
| CN109249918A (en) * | 2018-09-26 | 2019-01-22 | 三汽车制造有限公司 | Brake fluid system and vehicle |
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| Publication number | Publication date |
|---|---|
| CN109809332A (en) | 2019-05-28 |
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