CN204726505U - One accurately joins oily hydraulic steering gear - Google Patents
One accurately joins oily hydraulic steering gear Download PDFInfo
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- CN204726505U CN204726505U CN201520442566.XU CN201520442566U CN204726505U CN 204726505 U CN204726505 U CN 204726505U CN 201520442566 U CN201520442566 U CN 201520442566U CN 204726505 U CN204726505 U CN 204726505U
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Abstract
The utility model relates to one and accurately joins oily hydraulic steering gear, belongs to vehicle hydraulic transmission control technology field.The shell one end of this deflector is equipped with flat valve assembly, installs universal driving shaft in the endoporus of its spool, and the other end of housing and the stator of cycloidal pin wheel set are connected, and the other end of universal driving shaft engages with the rotor transmission of cycloidal pin wheel set; Housing is provided with two of being directly communicated with respectively through left and right oil transportation mouth and hydraulic steering cylinder two ends after flat valve assembly and joins oil subsidy and repay runner, turns to input shaft that signal is housed and exports and connect the rotary angle transmitter of joining oily compensation control circuit; The control output end of this control circuit connects joins the controlled end that oil subsidy repays electromagnetic valve, joins oil subsidy when repaying that electromagnetic valve is controlled is in open position, and oil inlet is by repaying runner and connect corresponding oil transportation mouth through cycloidal-pin wheel parafacies with the oil subsidy of joining flowed to flat valve assembly.Adopt after the utility model, deflector can be realized precisely oil is joined to hydraulic steering cylinder by supplementing, ensure that bearing circle is to the accurate manipulation of wheel steering angle.
Description
Technical field
The utility model relates to a kind of hydraulic steering gear, and especially one accurately joins oily hydraulic steering gear, belongs to hydraulic pressure drive control system technical field.
Background technology
All-hydraulic steering gear generally applies to the steering manipulation device on the engineering truck such as construction machinery and equipment, fork truck, and its typical structure can be the Chinese patent application document of 201110195256.9,201320401810.9 see application number.
The spool of existing hydraulic steering gear and valve pocket and valve pocket and steering gear housing inwall can wear and tear because of relative motion unavoidably, along with the lengthening of tenure of use, its tolerance clearance increases gradually, internal leakage aggravates gradually, after exceeding franchise threshold value, will cause and turn to not in place, the accurate control user demand of the engineering machinery vehicles such as accurate fork truck cannot be met.
Research shows, the actual rotational angle when internal leakage of hydrostatic steering system can cause bearing circle to realize certain course changing control is greater than theoretical corner, especially all the more so when the steeraxle heavy duty of engineering machinery vehicle.Long-term internal leakage accumulation causes bearing circle boosting ball shift in position, and result causes the position of the indexing state of bearing circle and wheel flutter cannot be corresponding, not only affects the manipulation precision of steering swivel system, and brings potential safety hazard.
Summary of the invention
The purpose of this utility model is: the shortcoming existed for above-mentioned prior art, propose a kind of can auto-compensation internal leakage, long-term keep steering wheel angle and wheel steering angle accurate corresponding accurately join oily hydraulic steering gear.
In order to reach above object, of the present utility modelly accurately join oily hydraulic steering gear and comprise the housing with oil inlet and the left and right oil transportation mouth be communicated with hydraulic steering cylinder two ends respectively, described shell one end is shaped with in the endoporus of runner and valve pocket is housed, described valve pocket turns to the spool of input shaft built with extending, form flat valve assembly; Install one end in the endoporus of described spool and form the circumferential universal driving shaft retrained by radial peg and described valve pocket, the other end of described housing is by being connected every the stator of dish with cycloidal pin wheel set (also known as measure motor), and the other end of described universal driving shaft engages with the rotor transmission of described cycloidal pin wheel set through the centre hole every dish; It is characterized in that: described housing is provided with two of being directly communicated with respectively through left and right oil transportation mouth and hydraulic steering cylinder two ends after flat valve assembly and joins oil subsidy and repay runner, described in turn to input shaft that rotary angle transmitter is housed; The signal output part of described rotary angle transmitter connects the signal input part of joining oily compensation control circuit, and the control output end of described control circuit connects joins the controlled end that oil subsidy repays electromagnetic valve, described in join oil subsidy and repay electromagnetic valve and have and turn on and off position; Described oil subsidy of joining is when repaying that electromagnetic valve is controlled is in open position, and described oil inlet is by repaying runner and connect corresponding oil transportation mouth through cycloidal-pin wheel parafacies with the oil subsidy of joining flowed to flat valve assembly.
Therefore, the cancellation ratio that after can using by deflector that is preset or Real-Time Monitoring, wear pattern draws, according to actual measurement steering wheel angle, control to join the service time that oil subsidy repays electromagnetic valve by joining oily compensation control circuit, thus directly supplement the oil mass corresponding to deflector internal leakage to hydraulic steering cylinder, realize deflector and precisely join oil to hydraulic steering cylinder, guarantee bearing circle is to the accurate manipulation of wheel steering angle, keep turning to precision, make that turning to of vehicle is sensitive, safety.
The utility model further improves, described in turn to input shaft to be equipped with to be fixed on the cover plate of housing termination, the stationary induction apparatus part of described cover plate further groove internal fixtion rotary angle transmitter, described in turn to rotation sensor part input shaft being fixed rotary angle transmitter.
The utility model further improves, described in join oily compensation control circuit and form primarily of as the signal acquisition module of signal input part, micro controller system main control chip and the solenoid valve driving module as control output end; The digital signal output end of described signal acquisition module connects the respective signal input pin of main control chip, and described solenoid valve driving module is formed by being controlled the power amplifying device that output pin is of coupled connections by photoelectric isolating device and main control chip.
The utility model further improves, and the other end of universal driving shaft, through the centre hole every dish, is engaged with the female splines transmission of the rotor of cycloidal pin wheel set by male splines.
Accompanying drawing explanation
Fig. 1 is the physical construction schematic diagram of the utility model embodiment.
Fig. 2 is the hydraulic system structure schematic diagram of Fig. 1 embodiment.
Fig. 3 is the principle of work block diagram of Fig. 1 embodiment.
Fig. 4-Figure 10 be Fig. 1 embodiment join oily compensation control circuit schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The present embodiment accurately join oily hydraulic steering gear basic structure as depicted in figs. 1 and 2, housing 1 has oil inlet P and is shaped with in the endoporus of runner with left and right oil transportation mouth L, R. housing 1 one end be communicated with hydraulic steering cylinder (not shown) two ends respectively valve pocket 2 is housed, valve pocket 2, built with extending the spool 3 turning to input shaft 3-1, forms flat valve assembly F1.The termination of input shaft 3-1 is turned to be connected with bearing circle by spline.Install one end in the endoporus of spool 3 and form the circumferential universal driving shaft 5 retrained by radial peg 4 and valve pocket 2, the other end of housing 1 is by being connected every the stator 7 of dish 6 with cycloidal pin wheel set F2.The other end of universal driving shaft 5, through the centre hole every dish 6, is engaged by the female splines transmission of male splines with the rotor 8 of cycloidal pin wheel set.Housing 1 is provided with two of being directly communicated with respectively through left and right oil transportation mouth L, R and hydraulic steering cylinder two ends after flat valve assembly and joins oil subsidy and repay runner l, r.Turn to input shaft 3-1 to be equipped with to be fixed on the cover plate 9 of housing 1 termination, the stationary induction apparatus part 10-1 of cover plate 9 further groove internal fixtion rotary angle transmitter 10, and turn to the rotation sensor part 10-2 rotating shaft of input shaft 3-1 being fixed rotary angle transmitter 10.The signal output part of rotary angle transmitter 10 connects the signal input part of joining oily compensation control circuit 11, and the control output end of this control circuit 11 connects and joins the controlled end that oil subsidy repays electromagnetic valve F3, joins oil subsidy and repays electromagnetic valve F3 and have and turn on and off position.
Join oil subsidy and repay electromagnetic valve F3 when being in scram position shown in Fig. 2, oil inlet P is by flat valve assembly F1 after cycloidal pin wheel set F2, by oil transportation mouth L, R one of the pressure oil output corresponding to rotating of steering wheel direction to hydraulic steering cylinder, hydraulic steering cylinder returns oil sump by after another oil return of oil transportation mouth from oil return inlet T.After there is internal leakage because wearing and tearing in deflector, join the cancellation ratio that oily compensation control circuit can obtain by preset or Real-Time Monitoring internal leakage, according to actual measurement steering wheel angle, control is joined oil subsidy and is repaid electromagnetic valve F3 and open suitable duration, during owing to being in open position, oil inlet P is by flat valve assembly F1 while cycloidal pin wheel set F2 pressure oil output to hydraulic steering cylinder, also by repaying runner l or r through corresponding oil transportation mouth directly to hydraulic steering cylinder pressure oil output through cycloidal-pin wheel parafacies with the oil subsidy of joining flowed to flat valve assembly, thus the output low on fuel (see Fig. 3) that compensation deflector internal leakage causes.Oil circuit is repaid and the original output circuit of deflector is relatively independent owing to joining oil subsidy, namely the hydraulic oil repaying electromagnetic valve F3 through joining oil subsidy directly exports hydraulic steering cylinder to without the cycloidal pin wheel set in deflector, therefore can not cause extra valve pocket accompany movement, thus ensure that the reliable and stable of steering manipulation.
Fig. 2 joins the concrete formation of oily compensation control circuit 11 as shown in Fig. 4-Figure 10, forms primarily of as the FB9432S signal acquisition module (Fig. 9) of signal input part, STC11F60XE micro controller system main control chip (Fig. 5) and the solenoid valve driving module (Fig. 8) as control output end.
Digital signal output end 5,7,8,9 pin of signal acquisition module meets the respective signal input pin 21-24 of main control chip respectively, the sinusoidal voltage angular signal that rotary angle transmitter can be exported to terminal row J6 is decoded, alternating voltage signal is converted to standardized digital signal, then sends to STC11F60XE.
STC11F60XE is the micro controller system containing microprocessor CPU, data memory RAM, program memory ROM, 48 bit parallel I/O mouths, serial port UART, timer/counter and interrupt systems, can process the control signal of the suitable duration of rear output to initialize data, input measured data.
Solenoid valve driving module is made up of controlled by photoelectric isolating device and main control chip that output pin P3.2 is of coupled connections two aerotron power amplifying devices of connecting, and the output of this power amplifying device is connected with two power leads of joining oil subsidy and repay electromagnetic valve respectively by 2 connection terminals of terminal row J7.Because electromagnetic valve coil belongs to inductive load, can form induced voltage, for avoiding forming reverse impact to other components and parts, this module is also provided with two flywheel diodes in parallel.
In addition, oily compensation control circuit is joined also containing providing the supply module of required voltage (Fig. 4), the MAX232 data communication module (Fig. 6) that can communicate with external computer and the human-computer interaction module (Fig. 7) as human and computer exchange message interface.
Test shows, after adopting the deflector of the present embodiment, due to after internal leakage exceedes permissible error, join oily compensation control circuit to open and join oil subsidy to repay electromagnetic valve be the quantitative replenisher force feed of steering swivel system oil circuit, and the original oil circuit of deflector provides and turns to required main delivery rate, therefore, it is possible to eliminate the deflector that causes because of internal leakage to join shortage of oil, what ensure that deflector joins accuracy, thus can keep wheel steering system for a long time turn to precision.
Claims (4)
1. accurately join oily hydraulic steering gear for one kind, comprise the housing with oil inlet and the left and right oil transportation mouth be communicated with hydraulic steering cylinder two ends respectively, described shell one end is shaped with in the endoporus of runner and valve pocket is housed, and described valve pocket turns to the spool of input shaft built with extending, and forms flat valve assembly; Install one end in the endoporus of described spool and form the circumferential universal driving shaft retrained by radial peg and described valve pocket, the other end of described housing is by being connected every the stator of dish with cycloidal pin wheel set, and the other end of described universal driving shaft engages with the rotor transmission of described cycloidal pin wheel set through the centre hole every dish; It is characterized in that: described housing is provided with two of being directly communicated with respectively through left and right oil transportation mouth and hydraulic steering cylinder two ends after flat valve assembly and joins oil subsidy and repay runner, described in turn to input shaft that rotary angle transmitter is housed; The signal output part of described rotary angle transmitter connects the signal input part of joining oily compensation control circuit, and the control output end of described control circuit connects joins the controlled end that oil subsidy repays electromagnetic valve, described in join oil subsidy and repay electromagnetic valve and have and turn on and off position; Described oil subsidy of joining is when repaying that electromagnetic valve is controlled is in open position, and described oil inlet is by repaying runner and connect corresponding oil transportation mouth through cycloidal-pin wheel parafacies with the oil subsidy of joining flowed to flat valve assembly.
2. according to claim 1ly accurately join oily hydraulic steering gear, it is characterized in that: described in turn to input shaft to be equipped with to be fixed on the cover plate of housing termination, the stationary induction apparatus part of described cover plate further groove internal fixtion rotary angle transmitter, described in turn to rotation sensor part input shaft being fixed rotary angle transmitter.
3. according to claim 2ly accurately join oily hydraulic steering gear, it is characterized in that: described in join oily compensation control circuit and form primarily of as the signal acquisition module of signal input part, micro controller system main control chip and the solenoid valve driving module as control output end; The digital signal output end of described signal acquisition module connects the respective signal input pin of main control chip, and described solenoid valve driving module is formed by being controlled the power amplifying device that output pin is of coupled connections by photoelectric isolating device and main control chip.
4. according to claim 3ly accurately join oily hydraulic steering gear, it is characterized in that: the other end of described universal driving shaft, through the centre hole every dish, is engaged with the female splines transmission of the rotor of cycloidal pin wheel set by male splines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520442566.XU CN204726505U (en) | 2015-06-26 | 2015-06-26 | One accurately joins oily hydraulic steering gear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520442566.XU CN204726505U (en) | 2015-06-26 | 2015-06-26 | One accurately joins oily hydraulic steering gear |
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| CN204726505U true CN204726505U (en) | 2015-10-28 |
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| CN201520442566.XU Active CN204726505U (en) | 2015-06-26 | 2015-06-26 | One accurately joins oily hydraulic steering gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314530A (en) * | 2015-06-26 | 2017-01-11 | 镇江液压股份有限公司 | Accurate oil distribution hydraulic steering device |
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- 2015-06-26 CN CN201520442566.XU patent/CN204726505U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314530A (en) * | 2015-06-26 | 2017-01-11 | 镇江液压股份有限公司 | Accurate oil distribution hydraulic steering device |
| CN106314530B (en) * | 2015-06-26 | 2019-05-10 | 镇江液压股份有限公司 | It is a kind of accurately to match oily hydraulic steering gear |
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