CN211594928U - Semi-automatic liquid filling valve type forklift power driving braking system - Google Patents
Semi-automatic liquid filling valve type forklift power driving braking system Download PDFInfo
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- CN211594928U CN211594928U CN202020228223.4U CN202020228223U CN211594928U CN 211594928 U CN211594928 U CN 211594928U CN 202020228223 U CN202020228223 U CN 202020228223U CN 211594928 U CN211594928 U CN 211594928U
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Abstract
The utility model discloses a semi-automatic topping-up valve formula fork truck power driving braking system, include: the hydraulic oil control system comprises a first oil pump, a steering oil path, a steering mechanism, a shuttle valve, an energy accumulator, a second oil pump, a braking oil path and a braking mechanism, wherein the first oil pump is connected with the steering mechanism through the steering oil path, the energy accumulator is connected with the steering oil path through an oil inlet A of the shuttle valve and is connected with the braking oil path through another oil inlet B, the second oil pump is connected with the braking mechanism through the braking oil path, when the energy accumulator is in a low-pressure state, a driver steps on a brake pedal, when a steering wheel is operated, hydraulic oil of the steering oil path is used for charging the energy accumulator through the oil inlet A of the shuttle valve, and hydraulic oil of the braking oil path is used for charging the energy accumulator through the. Through the shuttle valve, the energy accumulator is filled with liquid when the brake pedal is stepped on, and the energy accumulator can also be filled with liquid when the steering wheel is turned on, so that the braking safety of the forklift is improved.
Description
Technical Field
The utility model relates to a fork truck power service braking system technical field, in particular to semi-automatic topping-up valve formula fork truck power service braking system.
Background
The existing forklift brake system cannot automatically fill liquid, the energy accumulator can only fill liquid by pressing down a brake pedal, and when the pressure of the energy accumulator is insufficient, a pressure switch buzzer alarms at low pressure to remind a driver to timely press down the brake pedal to fill the energy accumulator, so that the energy accumulator can provide enough pressure oil for braking in an emergency driving state.
However, when the pressure of the energy accumulator is insufficient, the low-pressure alarm buzzer buzzes and is noisy, so that normal use of a forklift operator is influenced.
Therefore, how to improve the safety of the dynamic service braking of the forklift is a technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a semi-automatic liquid filling valve formula fork truck power driving braking system can improve fork truck's braking security.
In order to achieve the above object, the utility model provides a following technical scheme:
a semi-automatic, fill-valve, fork truck powered service braking system, comprising: the energy accumulator is used for supplying oil to the braking mechanism during emergency braking, and the second oil pump is connected with the braking mechanism through the braking oil way.
Preferably, the energy accumulator further comprises a pressure alarm connected with the energy accumulator, and the pressure alarm is used for sending out an alarm signal when the pressure in the energy accumulator is lower than a preset threshold value.
Preferably, the pressure alarm comprises a buzzer and/or an indicator light.
Preferably, a flow distributor of the multi-way valve diverter is arranged on the steering oil way.
Preferably, a multi-way valve brake valve flow distributor is arranged on the brake oil path.
Preferably, a brake valve is further arranged on the brake oil path, the energy accumulator is connected with the brake valve, and the brake valve is connected with the brake mechanism.
Preferably, the brake valve is a four-position five-way valve.
Preferably, the first oil pump and the second oil pump are gear pumps.
Compared with the prior art, the technical scheme has the following advantages:
the utility model provides a semi-automatic topping-up valve formula fork truck power driving braking system, when the energy storage ware is in the low pressure state, the driver tramples brake pedal, when operating the steering wheel, steering system and braking system all establish pressure, and the hydraulic oil of turning to the oil circuit is for energy storage ware topping-up through shuttle valve oil inlet A, and the hydraulic oil of braking oil circuit is for the energy storage ware topping-up through shuttle valve oil inlet B, and until the energy storage ware is in full charge state; when the energy accumulator is in a low-pressure state, a driver does not tread a brake pedal, pressure is built in a steering system when a steering wheel is operated, and when the pressure of the steering system is larger than the charging pressure of the energy accumulator, the steering system distributes small-flow oil to semi-automatically charge the energy accumulator to a full-charging state through an oil inlet A of a shuttle valve. Through the shuttle valve, the oil in the parallel steering oil way is converged into a prime power service braking system, except for the energy accumulator charging when a brake pedal is stepped, the energy accumulator can also be charged when a steering wheel is turned, so that the frequency of low-pressure alarm of the pressure switch due to the insufficient pressure of the energy accumulator is reduced, the braking safety of the forklift is improved, and the system also has the advantages of simple structure and low cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a hydraulic principle of a semi-automatic liquid-filled valve type forklift dynamic service braking system according to an embodiment of the present invention.
The reference numbers are as follows:
the system comprises a first oil pump 1, a second oil pump 2, a multi-way valve steering gear flow distributor 3, a steering oil path 4, a steering mechanism 5, an oil tank 6, a multi-way valve brake valve flow distributor 7, a brake oil path 8, an energy accumulator 9, a pressure alarm 10, a brake valve 11 and a shuttle valve 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
Referring to fig. 1, fig. 1 is a schematic diagram of a hydraulic principle of a semi-automatic liquid-filled valve type forklift dynamic service braking system according to an embodiment of the present invention.
The embodiment of the utility model provides a semi-automatic topping-up valve formula fork truck power service braking system, include: the hydraulic brake system comprises a first oil pump 1, a steering oil path 4, a steering mechanism 5, a shuttle valve 12, an energy accumulator 9, a second oil pump 2, a brake oil path 8 and a brake mechanism, wherein the first oil pump 1 and the second oil pump 2 are preferably gear pumps, the first oil pump 1 is connected with the steering mechanism 5 through the steering oil path 4, the shuttle valve 12 is provided with two oil inlets and an oil outlet, the oil inlets are respectively marked as A and B, the oil outlet is marked as C, the energy accumulator 9 is connected with the steering oil path 4 through one oil inlet A of the shuttle valve 12 and is connected with the brake oil path 8 through the other oil inlet B, the second oil pump 2 is connected with the brake mechanism through the brake oil path 8, the energy accumulator 9 is used for supplying oil to the brake mechanism during emergency braking, when the energy accumulator 9 is in a low-pressure state, a driver steps on a brake pedal, when a steering wheel is operated, pressure is built up in the steering system and the brake system, hydraulic oil of the brake oil way 8 is filled into the energy accumulator 9 through an oil inlet B of the shuttle valve 12 until the energy accumulator 9 is in a full state; when the energy accumulator 9 is in a low-pressure state, a driver does not tread a brake pedal, the steering system builds pressure when operating a steering wheel, and when the pressure of the steering system is larger than the charging pressure of the energy accumulator 9, the steering system distributes a small flow of oil to semi-automatically charge the energy accumulator 9 to a full-filling state through an oil inlet A of the shuttle valve 12. Through the shuttle valve 12, the oil in the parallel steering oil circuit 4 is merged into the prime power service braking system, except for the energy accumulator 9 is filled when the brake pedal is stepped, when the steering wheel is turned, the energy accumulator 9 can be filled, the frequency of low-pressure alarm of the pressure switch when the pressure of the energy accumulator 9 is insufficient is further reduced, the braking safety of the forklift is improved, and the system also has the advantages of simple structure and low cost.
Further, a pressure alarm 10 is included, connected to the accumulator 9, the pressure alarm 10 being adapted to emit an alarm signal when the pressure in the accumulator 9 is below a preset threshold, the alarm signal being visual or audible or both, for example including a buzzer and/or an indicator light.
Specifically, a multi-way valve steering gear flow distributor 3 is arranged on the steering oil path 4, a multi-way valve brake valve flow distributor 7 is arranged on the brake oil path 8, a brake valve 11 is further arranged on the brake oil path 8, the energy accumulator 9 is connected with the brake valve 11, the brake valve 11 is connected with a brake mechanism, and the brake valve 11 is preferably a four-position five-way valve.
In the non-braking state, the second oil pump 2 outputs to the multi-way valve brake valve flow distributor 7, then respectively enters the port B of the shuttle valve 12 and the port P of the brake valve 11, enters the energy accumulator 9 after passing through the port B of the shuttle valve 12, enters the port N of the brake valve 11 after passing through the port P of the brake valve 11, flows into the oil tank 6, and the oil in the brake wheel cylinder flows back to the oil tank 6 through the port Br of the brake valve 11.
When the brake, the steering and the accumulator 9 are in a liquid charging state, a brake pedal is stepped, part of oil from a port P of a brake valve 11 flows to a brake wheel cylinder through a port Br to implement braking, part of the oil charges the accumulator 9 through a shuttle valve 12, the rest of the oil flows back to a port N to an oil tank 6, when the brake pedal is not stepped, the brake valve 11 returns to the initial position, when a steering wheel is turned, a first oil pump 1 outputs to a flow distributor 3 of a multi-way valve steering gear, then the oil respectively flows to a port A of the shuttle valve 12 and a steering mechanism 5, and the oil flowing through the port A of the shuttle valve 12 enters the accumulator 9 to be charged.
When the oil pump is damaged or the engine is shut down and emergency braking is needed, the emergency braking oil source is provided by the energy accumulator 9, the brake pedal is stepped down, and the pressure on the energy accumulator 9 directly acts on the brake wheel cylinder to implement the emergency braking.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above that the utility model provides a semi-automatic topping-up valve formula fork truck power service braking system has introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A semi-automatic liquid-filled valve type forklift dynamic service braking system is characterized by comprising: the energy accumulator is used for supplying oil to the braking mechanism during emergency braking, and the second oil pump is connected with the braking mechanism through the braking oil way.
2. A semi-automatic fill valve type forklift dynamic service brake system as claimed in claim 1 further comprising a pressure alarm connected to the accumulator for emitting an alarm signal when the pressure in the accumulator is below a preset threshold.
3. A semi-automatic, fill valve, forklift dynamic service brake system as claimed in claim 2, wherein the pressure alarm comprises a buzzer and/or an indicator light.
4. A semi-automatic liquid filled valve type forklift dynamic service braking system as claimed in claim 1 wherein a multi-way valve diverter flow distributor is provided on the diverting oil path.
5. A semi-automatic liquid filled valve type forklift power service braking system as claimed in claim 4, wherein a multi-way valve brake valve flow distributor is arranged on the brake oil path.
6. A semi-automatic liquid filled valve type forklift dynamic service braking system as claimed in claim 5, wherein a brake valve is further arranged on the brake oil path, the accumulator is connected with the brake valve, and the brake valve is connected with the brake mechanism.
7. A semi-automatic, fill-valve, fork truck powered service brake system as claimed in claim 6, wherein the brake valve is a four-position, five-way valve.
8. A semi-automatic, fill-valve, forklift dynamic service brake system as recited in claim 7, wherein the first and second oil pumps are gear pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228223.4U CN211594928U (en) | 2020-02-25 | 2020-02-25 | Semi-automatic liquid filling valve type forklift power driving braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228223.4U CN211594928U (en) | 2020-02-25 | 2020-02-25 | Semi-automatic liquid filling valve type forklift power driving braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211594928U true CN211594928U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020228223.4U Active CN211594928U (en) | 2020-02-25 | 2020-02-25 | Semi-automatic liquid filling valve type forklift power driving braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211594928U (en) |
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2020
- 2020-02-25 CN CN202020228223.4U patent/CN211594928U/en active Active
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