CN206841413U - It is a kind of to be applied to the hydrostatic flexible braking device for walking agricultural machinery certainly - Google Patents
It is a kind of to be applied to the hydrostatic flexible braking device for walking agricultural machinery certainly Download PDFInfo
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- CN206841413U CN206841413U CN201720473148.6U CN201720473148U CN206841413U CN 206841413 U CN206841413 U CN 206841413U CN 201720473148 U CN201720473148 U CN 201720473148U CN 206841413 U CN206841413 U CN 206841413U
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- magnetic valve
- proportion magnetic
- plc
- hall sensor
- advance
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Abstract
The utility model discloses a kind of applied to the hydrostatic flexible braking device for walking agricultural machinery certainly, including Hall sensor, advance proportion magnetic valve and retreat proportion magnetic valve, Hall sensor is electrically connected with PLC, the output end of PLC is connected to advance proportion magnetic valve and retreats proportion magnetic valve, advance proportion magnetic valve and retrogressing proportion magnetic valve difference safety ground；The present apparatus controls the fluid of power or brakes to convey using the electric signal of Hall sensor, realize electrichydraulic control, avoid driver and run into emergency during vehicle advances (or retreat) and pull the excessive phenomenon of handle suddenly, realize flexible fast braking, flexible working braking can reduce the impact to hydraulic system to greatest extent, and engine rotating speed caused by motor is braked raises, help to ensure that the service life of engine, prevent to cause the heterodromous risk of vehicle, improve the security of mechanical braking, it ensure that the security of vehicle traveling.
Description
Technical field
A kind of technical field of agricultural mechanical equipment is the utility model is related to, more particularly to one kind walks agriculture certainly applied to hydrostatic
The flexible braking device of machine.
Background technology
Farm working machinery of the prior art, it is required for starting to accelerate and stop to slow down in each work cycle, and
The advance of vehicle, stopping and retrogressing are controlled using the progressive position of operation handle, centre position and going-back position mostly.When driving
The person of sailing can pull handle suddenly, it is intended that emergency brake of vehicle when running into emergency during vehicle advances (or retrogressing)
Or accelerate, exist in aforesaid operations because the meeting handle that overexerts is pulled through centre position, cause the heterodromous risk of vehicle,
Greatly reduce the security of mechanical braking.
Furthermore farm working machinery, in full load, overall mass is larger, it can all be produced in starting accelerates and parking is slowed down
Raw larger inertia.Therefore larger inertia load being brought to hydraulic system, inertia load not only brings impact to hydraulic system,
Also the service life of element is shortened, also have impact on the operation quality of farm working machinery.
Utility model content
Technical problem to be solved in the utility model prevents firmly excessive cause when being to provide a kind of control machinery operation
Handle operation it is excessive be applied to it is hydrostatic from the flexible braking device for walking agricultural machinery.
In order to solve the above technical problems, the technical solution of the utility model is：It is a kind of to walk agricultural machinery certainly applied to hydrostatic
Flexible braking device, including the Hall sensor in operation handle, the advance ratio electromagnetism in dynamical system
Valve, the retrogressing proportion magnetic valve on backing system, the Hall sensor are electrically connected with PLC, the PLC controls
The output end of device processed is connected to the advance proportion magnetic valve and the retrogressing proportion magnetic valve, the advance proportion magnetic valve and
The retrogressing proportion magnetic valve difference safety ground.
As preferable technical scheme, the voltage input end of the Hall sensor is connected to the PLC
VSS_2 pin, the voltage signal output end of the Hall sensor are connected to the IN_1 pin of the PLC, and the Hall passes
The earth terminal of sensor is connected to the IN_39 pin of the PLC.
As the improvement to above-mentioned technical proposal, the advance proportion magnetic valve is connected to out (1) pin of PLC,
Described out (3) pin for retreating proportion magnetic valve and being connected to PLC.
By adopting the above-described technical solution, the beneficial effects of the utility model are：The present apparatus is using Hall sensor
Electric signal come control the fluid of power or brakes convey, realize electric-liquid control, avoid driver vehicle advance
Emergency is run into during (or retrogressing) and pulls the excessive phenomenon of handle suddenly, realizes flexible fast braking, flexible working
Braking can reduce the impact to hydraulic system to greatest extent, and engine rotating speed caused by motor is braked raises, and contributes to
Ensure the service life of engine, prevented to cause the heterodromous risk of vehicle, improved the security of mechanical braking, ensure
The security of vehicle traveling.
Brief description of the drawings
The following drawings is only intended to, in doing the utility model schematic illustration and explanation, not limit model of the present utility model
Enclose.Wherein：
Fig. 1 is the circuit theory diagrams of the utility model embodiment；
In figure：1- operation handles；2- Hall sensors；3-PLC controllers；4- advance proportion magnetic valves；5- retreats ratio
Magnetic valve.
Embodiment
With reference to the accompanying drawings and examples, the utility model is expanded on further.In the following detailed description, only pass through
Bright mode describes some one exemplary embodiments of the present utility model.Undoubtedly, one of ordinary skill in the art can be with
Recognize, can be with a variety of modes to described in the case of without departing from spirit and scope of the present utility model
Embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than for limiting the protection of claim
Scope.
As shown in figure 1, it is a kind of applied to the hydrostatic flexible braking device for walking agricultural machinery certainly, including installed in operation handle 1
Interior Hall sensor 2, the advance proportion magnetic valve 4 in dynamical system, the retrogressing ratio on backing system
Magnetic valve 5, specifically, the advance proportion magnetic valve 4 are arranged on the advance hydraulic pressure pump conduit of dynamical system, the retrogressing ratio
Example magnetic valve 5 is arranged on the retrogressing hydraulic pressure pump conduit of backing system, and the advance hydraulic pump and the retrogressing hydraulic pump can be with
The same pump housing is arranged to, the advance proportion magnetic valve 4 and the retrogressing proportion magnetic valve 5 are respectively intended to control corresponding system
Interior oil stream amount.The Hall sensor 2 is electrically connected with PLC 3, and the output end of the PLC 3 is connected to described
Advance proportion magnetic valve 4 and the retrogressing proportion magnetic valve 5, the advance proportion magnetic valve 4 and the retrogressing proportion magnetic valve 5
Safety ground respectively.The remote and specific method of the manipulation position of the operation handle 1 is detected using the Hall sensor 2,
For the content known to those of ordinary skill in the art, no longer describe in detail herein.
The PLC 3 in the present embodiment is arranged to BOSCH-REXROTH RC28-14, and the voltage of the Hall sensor 2 is defeated
Enter the VSS_2 pin that end is connected to the PLC 3, i.e., 232 stitch of described PLC 3, it is described that the stitch, which is used for,
Hall sensor 2 provides 10V operating voltage；The voltage signal output end of the Hall sensor 2 is connected to the PLC controls
The Hall sensor 2 is detected caused analog voltage by the IN_1 pin of device 3, i.e., 250 stitch of described PLC 3, the pin
Signal is delivered in the PLC 3；The earth terminal of the Hall sensor 2 is connected to the IN_39 of the PLC 3
Pin, i.e., 146 stitch of described PLC 3, the pin make the Hall sensor 2 carry out safety ground.
The advance proportion magnetic valve 4 is connected to out (1) pin of PLC 3, i.e., 153 pins of described PLC 3
Pin, described out (3) pin for retreating proportion magnetic valve 5 and being connected to PLC 3, i.e., 177 stitch of described PLC 3, institute
It is that the PLC 3PWM pulse signals are defeated to state 153 stitch of PLC 3 and 177 stitch of the PLC 3
Go out terminal, for exporting pwm pulse control signal, so as to drive corresponding magnetic valve to carry out quantitative action.
The operation principle of the present embodiment is as described below：
The operation handle 1 of farm working machinery walking is controlled, centre position, the PLC controls are moved to from progressive position
The pwm signal of device 3 processed before output, first passes around the variable digital first order low pass filter of a timeconstantτ, makes output
Being exported according to the form of one order inertia, drive the electric current of the advance proportion magnetic valve 4, electric current is reduced by one order inertia form,
Until electric current becomes zero, braking is produced.
The operation handle 1 of farm working machinery walking is controlled, is moved to during centre position, it is necessary to when providing one
Between scope t, time range t can be adjusted according to actual conditions, if in time range t, the position of the operation handle 1
Shifting amount is more than the critical value of default, then it is assumed that meets the condition of triggering fast braking, reduces digital first order on this condition
The timeconstantτ of low pass filter, the electric current of the bigger advance proportion magnetic valve 4 of reduction speed is obtained, compare work to obtain
Brake more significant braking effect.
When the operation handle 1 that control farm working machinery is walked, centre position is pulled through from progressive position, after arrival
Give up the throne when putting, commutating period of the operation handle 1 from progressive position to going-back position is judged, if commutating period is less than 1s, institute
The PWM output ports for stating PLC 3 control the electric current of the advance proportion magnetic valve 4 to reduce, until electric current becomes zero, from
And control vehicle to brake, if commutating period is more than 1s, the electric current of the advance proportion magnetic valve 4 is decreased to after electric current becomes zero,
After stationary vehicle, the PLC 3 can calculate the retrogressing according to the operation handle 1 in the displacement of going-back position
The driving current value of proportion magnetic valve 5, then driving retreats proportion magnetic valve 5 in the form of one order inertia, makes vehicle backing.
The utility model controls the fluid of power or brakes to convey using the electric signal of Hall sensor, realizes
Electric-liquid controls, and avoids driver and runs into during vehicle advances (or retreat) emergency and pulls handle excessive suddenly
Phenomenon, flexible fast braking is realized, flexible working braking can reduce the impact to hydraulic system to greatest extent, and start
Machine rotating speed caused by motor is braked raises, and helps to ensure that the service life of engine, has prevented to cause vehicle heterodromous
Risk, the security of mechanical braking is improved, ensure that the security of vehicle traveling.
The advantages of general principle of the present utility model, principal character and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (3)
- It is 1. a kind of applied to the hydrostatic flexible braking device for walking agricultural machinery certainly, it is characterised in that：Including in operation handle Hall sensor, the advance proportion magnetic valve in dynamical system, the retrogressing ratio electromagnetism on backing system Valve, the Hall sensor are electrically connected with PLC, and the output end of the PLC is connected to the advance ratio electricity Magnet valve and the retrogressing proportion magnetic valve, the advance proportion magnetic valve and the retrogressing proportion magnetic valve difference safety ground.
- It is 2. as claimed in claim 1 a kind of applied to the hydrostatic flexible braking device for walking agricultural machinery certainly, it is characterised in that：It is described The voltage input end of Hall sensor is connected to the VSS_2 pin of the PLC, and the voltage signal of the Hall sensor is defeated Go out the IN_1 pin that end is connected to the PLC, the earth terminal of the Hall sensor is connected to the PLC IN_39 pin.
- It is 3. as claimed in claim 1 or 2 a kind of applied to the hydrostatic flexible braking device for walking agricultural machinery certainly, it is characterised in that： The advance proportion magnetic valve is connected to out (1) pin of PLC, and the retrogressing proportion magnetic valve is connected to PLC Out (3) pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720473148.6U CN206841413U (en) | 2017-05-02 | 2017-05-02 | It is a kind of to be applied to the hydrostatic flexible braking device for walking agricultural machinery certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720473148.6U CN206841413U (en) | 2017-05-02 | 2017-05-02 | It is a kind of to be applied to the hydrostatic flexible braking device for walking agricultural machinery certainly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206841413U true CN206841413U (en) | 2018-01-05 |
Family
ID=60794101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720473148.6U Expired - Fee Related CN206841413U (en) | 2017-05-02 | 2017-05-02 | It is a kind of to be applied to the hydrostatic flexible braking device for walking agricultural machinery certainly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206841413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653113A (en) * | 2021-08-24 | 2021-11-16 | 山推工程机械股份有限公司 | Bulldozer steering brake control method and bulldozer steering brake control system |
-
2017
- 2017-05-02 CN CN201720473148.6U patent/CN206841413U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653113A (en) * | 2021-08-24 | 2021-11-16 | 山推工程机械股份有限公司 | Bulldozer steering brake control method and bulldozer steering brake control system |
| CN113653113B (en) * | 2021-08-24 | 2022-07-01 | 山推工程机械股份有限公司 | Bulldozer steering brake control method and bulldozer steering brake control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20190502 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |