CN102358181A - Differential protection device and engineering machinery - Google Patents
Differential protection device and engineering machinery Download PDFInfo
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- CN102358181A CN102358181A CN2011102525833A CN201110252583A CN102358181A CN 102358181 A CN102358181 A CN 102358181A CN 2011102525833 A CN2011102525833 A CN 2011102525833A CN 201110252583 A CN201110252583 A CN 201110252583A CN 102358181 A CN102358181 A CN 102358181A
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Abstract
The invention relates to the technical field of engineering machinery, and discloses a differential protection device and the engineering machinery. The differential protection device also comprises a differential control unit besides a differential electromagnetic valve and a differential rocker switch, wherein the differential rocker switch is used for controlling the power on or power failure of the differential electromagnetic valve; and the differential control unit is used for determining whether a vehicle steers or not when the differential electromagnetic valve is powered on and making the differential electromagnetic valve in a power failure state when the vehicle is determined to be steered. By using the differential protection device provided by the embodiment of the invention, the steering state of the vehicle can be detected by a left position sensor and a right position sensor when a differential lock is in an unlocked state, namely when the differential electromagnetic valve is powered on; when the vehicle steers, output loops of the left position sensor and the right position sensor are switched on so that the coil of a relay is conducted; the two normally closed contacts of the relay are disconnected, so that the differential electromagnetic valve is in a power failure state and the differential lock is relieved; therefore, a differential is prevented from being damaged effectively, and the service life of the differential is prolonged.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of diff fender guard of using.The invention still further relates to a kind of construction machinery and equipment with above-mentioned diff fender guard.
Background technology
The working environment of hoisting crane is more abominable, and the marshy area of often coming in and going out is opened the carrying capacity that diff lock (differential locking-device) can improve automobile when tyre skidding or when getting down hopeless in a quagmire.But when using differential locking-device, vehicle can not be turned.Therefore, in operation process, chaufeur is opened differential locking-device, because the turning maloperation is easy to damage diff.
Please refer to Fig. 1, Fig. 1 is the structural representation of existing a kind of typical differential-lock control.As shown in the figure; This differential-lock control comprises between 24V power supply, fuse F 1 (10A), shaft space difference speed rocker switch JK1, shaft space difference speed indicator lamp L1, shaft space difference speed electromagnetic valve DT1, wheel between differential rocker switch JK2, wheel differential electromagnetic valve DT2, diode D1 and D2 and buzzer phone DL1 between differential indicator lamp L2, wheel; In the course of the work; When hoisting crane vehicle process marshy area, chaufeur is opened differential rocker switch JK2 between shaft space difference speed rocker switch JK1 or wheel, and differential electromagnetic gas valve DT2 gets between shaft space difference speed electromagnetic valve DT1 or wheel; Buzzer phone DL1 pipes; Diff lock is connected (being that differential locking-device is opened), and differential indicator lamp L2 lights between shaft space difference speed indicator lamp L1 or wheel, and vehicle passes through marshy area smoothly.
In the such scheme, if chaufeur maloperation under the situation that the differential rocker switch is not closed is beaten bearing circle and turned, this moment, differential locking-device also was in open mode, will inevitably damage diff.Therefore, demand urgently improving, to avoid owing to maloperation damages diff to existing scheme.
Summary of the invention
In view of this, automatically terminate differential locking-device when being implemented in Vehicular turn, avoid, on the one hand, the invention provides a kind of diff fender guard owing to the chaufeur maloperation damages diff.
This diff fender guard is except comprising the differential electromagnetic valve and being used to control the differential rocker switch that this differential electromagnetic valve gets electric or dead electricity; Also comprise: the differential control unit; Be used for getting to confirm whether vehicle turns to when electric, and when confirming Vehicular turn, make the differential electromagnetic valve be in power failure state at the differential electromagnetic valve.
Preferably, said differential control unit comprises:
Whether the steering state detecting unit is used for getting at the differential electromagnetic valve and detects vehicle when electric and turn to;
Processing unit is used for making the differential electromagnetic valve be in power failure state in the steering state detection during to Vehicular turn.
Preferably; Said differential electromagnetic valve comprises differential electromagnetic valve and shaft space difference speed electromagnetic valve between wheel; Said differential rocker switch comprises and is used to control between the wheel that differential electromagnetic valve between wheel gets electric or dead electricity the differential rocker switch and is used to control the shaft space difference speed rocker switch that the shaft space difference speed electromagnetic valve gets electric or dead electricity, and said differential control unit makes when confirming Vehicular turn that differential electromagnetic valve and shaft space difference speed electromagnetic valve are in power failure state between wheel.
Preferably; Said differential control unit comprises relay, left position transduser and right position transduser; Said relay has input circuit, first output loop and second output loop; Said first output loop, the wheel between the differential rocker switch and the wheel between the differential electromagnetic valve be series between the power positive cathode each other; Said second output loop, shaft space difference speed rocker switch and shaft space difference speed electromagnetic valve are series between the power positive cathode each other, and the output loop of said left position transduser and said right position transduser is parallel with one another, and one of them sys node is connected to the input circuit of relay; Another sys node is connected to power cathode, and said left position transduser and said right position transduser its output loop when detecting Vehicular turn is connected.
Preferably, first output loop of said relay and second output loop are normally off.
Preferably, first output loop of said relay and second output loop be series at respectively said take turns a differential rocker switch and said take turns between the differential electromagnetic valve and said shaft space difference speed rocker switch and said shaft space difference speed electromagnetic valve between; The input circuit of said relay is connected to said node and the node between said shaft space difference speed rocker switch and said second output loop of taking turns between a differential rocker switch and said first output loop respectively.
Preferably, said left position transduser is installed in the left installing zone on the Vehicular turn plumbing arm permanent seat, and this left side installing zone is the coincide left half-court of part of steering drop arm permanent seat and steering drop arm swing covering of the fan scope; Said right position transduser is installed in the right installing zone on the said steering drop arm permanent seat, and this right side installing zone is the right half-court that steering drop arm permanent seat and steering drop arm swing covering of the fan scope coincide.
Preferably, said left position transduser and said right position transduser are inductance approach switch.
On the other hand, the present invention also provides a kind of construction machinery and equipment, and this project machinery has above-mentioned each described diff fender guard.
Preferably, this project machinery is hoisting crane.
A kind of diff fender guard provided by the invention and have the construction machinery and equipment of this diff fender guard through when differential locking-device is in open mode, promptly gets when electric at the differential electromagnetic valve; Judge whether vehicle turns to; And when definite vehicle turns to, making the differential electromagnetic valve be in power failure state, differential locking-device is able to remove; Thereby effectively avoid diff to be damaged, prolonged the service life of diff.
Description of drawings
Fig. 1 is the structural representation of existing a kind of typical differential-lock control;
The structured flowchart of a kind of diff fender guard that Fig. 2 provides for the embodiment of the invention.
Fig. 3 is the scheme drawing of a kind of concrete structure of diff fender guard shown in Figure 2;
Fig. 4 is the installation site scheme drawing of left and right sides position transduser among Fig. 3.
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.Should be pointed out that description and the description order to concrete structure only is the explanation to specific embodiment in this part, should not be regarded as that protection scope of the present invention is had any restriction.
Please refer to Fig. 2, the structured flowchart of a kind of diff fender guard that Fig. 2 provides for the embodiment of the invention.
As shown in Figure 2, this diff fender guard comprises differential rocker switch 11, differential electromagnetic valve 12 and differential control unit 13, wherein:
Differential electromagnetic valve 12 is used to control opening or closing of diff lock (differential locking-device), when differential electromagnetic valve 12 when electric, differential locking-device is opened, when differential electromagnetic valve 12 dead electricity, differential locking-device is closed;
Please refer to Fig. 3, Fig. 3 is the scheme drawing of a kind of concrete structure of above-mentioned diff fender guard.
As shown in Figure 3; This diff fender guard specifically comprises between 24V power supply, fuse F 1 (10A), shaft space difference speed rocker switch JK1, shaft space difference speed indicator lamp L1, shaft space difference speed electromagnetic valve DT1, wheel between differential rocker switch JK2, wheel differential electromagnetic valve DT2, diode D1 and D2, buzzer phone DL1, relay K A1, diode D3 and D4, left position transduser K1 and right position transduser K2 between differential indicator lamp L2, wheel, wherein:
Fuse F 1 plays overload protection;
Differential indicator lamp L2 is serially connected between the power positive cathode respectively between shaft space difference speed indicator lamp L1 and wheel; When shaft space difference speed rocker switch JK1 opened, shaft space difference speed indicator lamp L1 lighted, and when differential rocker switch JK2 opened between wheel, differential indicator lamp L2 lighted between wheel.
Relay K A1 has two normally closed contacts (promptly being in the output loop of normally off), comprises first normally closed contact (first output loop) and second normally closed contact (second output loop);
Shaft space difference speed rocker switch JK1, first normally closed contact and shaft space difference speed electromagnetic valve DT1 are series between the power positive cathode successively each other; Differential electromagnetic valve DT2 is series between the power positive cathode successively each other between differential rocker switch JK2 between wheel, second normally closed contact and wheel;
One end of the wire loop of relay K A1 (input circuit) is connected in the node between differential rocker switch JK2 and second normally closed contact between node and the wheel between the shaft space difference speed rocker switch JK1 and first normally closed contact through diode D3 and D4 respectively; Diode D3 and D4 play the effect of reverse connecting protection
The output loop of left side position transduser K1 and right position transduser K2 is parallel with one another, and one of them sys node is connected in power cathode, and another sys node is connected in the other end of relay K A1 wire loop;
The end of buzzer phone DL1 is connected in the connecting joint between the differential electromagnetic valve DT2 between connecting joint and second normally closed contact and the wheel between first normally closed contact and the shaft space difference speed electromagnetic valve DT1 through diode D1 and D2 respectively, and the other end is connected in power cathode.
Left side position transduser K1 and right position transduser K2 are inductance approach switch, please refer to Fig. 3, and Fig. 3 is the installation site scheme drawing of left position transduser K1 and right position transduser K2.Steering drop arm 1 is installed on the steering drop arm permanent seat (not shown), and during the left-handed turning Moving plate, mechanisms such as drive steering column drag link drive steering drop arm 1 and swing left; The turning clockwise steering handwheel drives steering column, drives steering drop arm through mechanisms such as steering drag links and swings to the right.The swaying direction of steering drop arm 1, amplitude are corresponding with direction, amplitude that steering handwheel rotates, that is, steering drop arm 1 and the relative position of steering drop arm permanent seat have reflected the moving situation of steering handwheel.Therefore, detect the relative position signal of steering drop arm 1 and steering drop arm permanent seat, be equivalent to detect the rotary state of steering handwheel, that is the steering state of vehicle.Position transduser is installed in the special mounting zone on the steering drop arm permanent seat, can guarantees that position transduser detects the position signal of steering drop arm 1 reliably and exports switching value in good time, makes the wire loop conducting of relay K A1.
As shown in Figure 3, when the Vehicular turn dish when meta reaches the left-limit steering position, steering drop arm 1 is pendulum angle θ (as 32 °) left.In like manner, when steering handwheel was got to the limit on the right-right-hand limit steering position from meta, steering drop arm 1 is pendulum angle θ (as 32 °) to the right.Therefore, in order to guarantee to detect reliably the position signal of steering drop arm 1, position transduser is installed in the zone of intersection of steering drop arm permanent seat and steering drop arm 1 swing covering of the fan.Wherein, left position transduser K3 is installed in steering drop arm permanent seat and steering drop arm 1 swing covering of the fan scope and coincides in the left half-court of part, is called left installing zone; Right position transduser K4 is installed in steering drop arm permanent seat and the steering drop arm 1 swing covering of the fan scope right half-court partly that coincides, and is called right installing zone.
As shown in Figure 3; Preferably; Said left installing zone is near the zone the A, 2 lines of B, and the A point is left start of installation, steering drop arm 1 left border about 1/4 projection of being on the steering drop arm permanent seat apart from the upper end during for the left-limit steering position; The B point is that terminal point is installed on a left side, and steering drop arm 1 right border is in the projection on the steering drop arm permanent seat apart from the last first lunar month 1/2 during for the left-limit steering position.Preferably; It is said that installing zone is arranged is near the zone the C, 2 lines of D; The C point is right start of installation; Steering drop arm 1 right border is in the projection on the steering drop arm permanent seat apart from the last first lunar month 1/4 during for the limit on the right-right-hand limit steering position, and D point be a right side installation terminal point, steering drop arm 1 left border about 1/2 projection of being on the steering drop arm permanent seat apart from the upper end during for the limit on the right-right-hand limit steering position.In this preferred fitting limit, when steering drop arm 1 swing, the signal amplitude that position transduser detects big drop can not occur, therefore is convenient to adjust its sensitivity and installation site.
In concrete operation process; When vehicle ' was on muddy road, in order to improve the vehicle carrying capacity, chaufeur was opened differential rocker switch JK2 between shaft space difference speed rocker switch JK1 and/or wheel; Differential indicator lamp L2 lights between shaft space difference speed indicator lamp L1 and/or wheel; Differential electromagnetic valve DT2 gets electricly between shaft space difference speed electromagnetic valve DT1 and/or wheel, and differential locking-device is opened, the diff locking; At this moment, the steering handwheel (even vehicle left-handed turning to) if chaufeur turns left, steering handwheel drives steering column; Drive spindle arm 1 through mechanisms such as steering drag links and swing left, covered the inductor of left position transduser K1, trigger its output loop and form path; The wire loop of cutin relay KA1, two normally closed contacts of relay K A1 break off differential electromagnetic valve DT1 and DT2 dead electricity; Differential locking-device is closed, and avoids diff to be damaged; In like manner, if chaufeur turning clockwise steering handwheel (even vehicle right-hand turning to), steering handwheel drives steering column; Drive spindle arm 1 through mechanisms such as steering drag links and swing to the right, covered the inductor of right position transduser K2, trigger its output loop and form path; The wire loop of cutin relay KA1, two normally closed contacts of relay K A1 break off differential electromagnetic valve DT1 and DT2 dead electricity; Differential locking-device is closed, and avoids diff to be damaged.
Need to prove, in the foregoing description or among other embodiment, can also use the position transduser of other types as required, for example magnetic induction type near switch, mechanical type near switch etc.; The installation site of position transduser also is not limited to above-mentioned installation site in addition, also can be arranged on as required on other positions, only otherwise influence detects the steering state of vehicle to get final product.
Need to prove; In the foregoing description; Two normally closed contacts of relay K A1 can be serially connected with respectively between shaft space difference speed rocker switch JK1 and the shaft space difference speed electromagnetic valve DT1 and wheel between differential rocker switch JK2 with take turns between between the differential electromagnetic valve DT2 (as shown in Figure 3); Also can be serially connected with other positions respectively; For example, can also be serially connected with between positive source and the shaft space difference speed rocker switch JK1 respectively and between positive source and wheel between the differential electromagnetic valve DT2, perhaps be serially connected with between shaft space difference speed electromagnetic valve DT1 and the power cathode respectively and between power cathode and wheel between the differential electromagnetic valve DT2.
Need to prove; In the foregoing description; One end of relay K A1 wire loop can be respectively be connected in the connecting joint between the differential rocker switch JK2 and second normally closed contact between connecting joint and the wheel between the shaft space difference speed rocker switch JK1 and first normally closed contact through diode D3 and D4; Also can be connected in other relevant positions through diode D3 and D4 respectively; For example, be connected in the connecting joint between the differential electromagnetic valve DT2 between connecting joint and second normally closed contact and the wheel between first normally closed contact and the shaft space difference speed electromagnetic valve DT1 through diode D3 and D4 respectively.
Need to prove; In the foregoing description; Only use a relay K A1 that the on-state of two differential electromagnetic valve DT1 and DT2 is carried out synchro control, but in other embodiments, also can use two relays respectively the on-state of DT1 and DT2 to be controlled as required; Its implementation procedure and above-mentioned similar is not given unnecessary details now.
Need to prove, in the foregoing description, use the control circuit of forming by relay K A1, diode D3 and D4, left position transduser K1 and right position transduser K2 as differential control unit 13; So that the on-state to differential electromagnetic valve DT1 and DT2 is controlled, but in other embodiments, the concrete structure of differential control unit is not limited thereto; Can also use other modes to realize; For example, can directly analyze the operational factor of vehicle, judge whether vehicle turns to through software or hardware mode; And when confirming to turn to, drive differential electromagnetic valve DT1 and DT2 and close.
Need to prove; In the practical implementation process; Differential control unit 13 can be made up of the unit (module) of realizing corresponding function, for example, and when realizing through hardware mode; Steering state detecting unit 131 can be integrated on the same physical entity with processing unit 132, also can make independently two unit.
A kind of diff fender guard that the embodiment of the invention provides can be when differential locking-device be in open mode, promptly gets when electric at the differential electromagnetic valve; Through the steering state of left and right sides position transduser detection vehicle, when vehicle turned to, the output loop of left and right sides position transduser was connected; Make the wire loop conducting of relay; Two normally closed contacts of relay break off, and make the differential electromagnetic valve be in power failure state, and differential locking-device is able to remove; Thereby effectively avoid diff to be damaged, prolonged the service life of diff.
The embodiment of the invention also provides a kind of construction machinery and equipment (like hoisting crane); This project machinery has above-mentioned diff fender guard; Because above-mentioned diff fender guard has above-mentioned technique effect, therefore, the construction machinery and equipment with this diff fender guard also should possess the corresponding techniques effect; Its practical implementation process is similar to the above embodiments, does not give unnecessary details now.
Through the description of above embodiment, those skilled in the art can be well understood to the present invention and can realize by software combined with hardware flat-bed mode, can certainly all implement through hardware.Based on such understanding; All or part of can the coming out that technical scheme of the present invention contributes to background technology with the embodied of software product; This software product can be stored in the storage medium; Like ROM/RAM, magnetic disc and CD etc., comprise that some instructions are used so that a computer equipment (for example can be Personal Computer, server or the network equipment etc.) is carried out the described content of some part of each embodiment of the present invention or embodiment.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. diff fender guard; Comprise the differential electromagnetic valve and be used to control the differential rocker switch that this differential electromagnetic valve gets electric or dead electricity; It is characterized in that; Said diff fender guard also comprises: the differential control unit is used for getting to confirm whether vehicle turns to when electric at the differential electromagnetic valve, and when confirming Vehicular turn, makes the differential electromagnetic valve be in power failure state.
2. diff fender guard as claimed in claim 1 is characterized in that, said differential control unit comprises:
Whether the steering state detecting unit is used for getting at the differential electromagnetic valve and detects vehicle when electric and turn to;
Processing unit is used for making the differential electromagnetic valve be in power failure state in the steering state detection during to Vehicular turn.
3. according to claim 1 or claim 2 diff fender guard; It is characterized in that; Said differential electromagnetic valve comprises differential electromagnetic valve and shaft space difference speed electromagnetic valve between wheel; Said differential rocker switch comprises and is used to control between the wheel that differential electromagnetic valve between wheel gets electric or dead electricity the differential rocker switch and is used to control the shaft space difference speed rocker switch that the shaft space difference speed electromagnetic valve gets electric or dead electricity, and said differential control unit makes when confirming Vehicular turn that differential electromagnetic valve and shaft space difference speed electromagnetic valve are in power failure state between wheel.
4. diff fender guard as claimed in claim 3; It is characterized in that: said differential control unit comprises relay, left position transduser and right position transduser; Said relay has input circuit, first output loop and second output loop; Said first output loop, the wheel between the differential rocker switch and the wheel between the differential electromagnetic valve be series between the power positive cathode each other; Said second output loop, shaft space difference speed rocker switch and shaft space difference speed electromagnetic valve are series between the power positive cathode each other, and the output loop of said left position transduser and said right position transduser is parallel with one another, and one of them sys node is connected to the input circuit of relay; Another sys node is connected to power cathode, and said left position transduser and said right position transduser its output loop when detecting Vehicular turn is connected.
5. diff fender guard as claimed in claim 4 is characterized in that, first output loop of said relay and second output loop are normally off.
6. diff fender guard as claimed in claim 5 is characterized in that: first output loop of said relay and second output loop be series at respectively said take turns a differential rocker switch and said take turns between the differential electromagnetic valve and said shaft space difference speed rocker switch and said shaft space difference speed electromagnetic valve between; The input circuit of said relay is connected to said node and the node between said shaft space difference speed rocker switch and said second output loop of taking turns between a differential rocker switch and said first output loop respectively.
7. diff fender guard as claimed in claim 6; It is characterized in that; Said left position transduser is installed in the left installing zone on the Vehicular turn plumbing arm permanent seat, and this left side installing zone is the coincide left half-court of part of steering drop arm permanent seat and steering drop arm swing covering of the fan scope; Said right position transduser is installed in the right installing zone on the said steering drop arm permanent seat, and this right side installing zone is the right half-court that steering drop arm permanent seat and steering drop arm swing covering of the fan scope coincide.
8. diff fender guard as claimed in claim 7 is characterized in that, said left position transduser and said right position transduser are inductance approach switch.
9. a construction machinery and equipment is characterized in that, said construction machinery and equipment has like each described diff fender guard of claim 1 to 8.
10. construction machinery and equipment as claimed in claim 9 is characterized in that, said construction machinery and equipment is a hoisting crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252583.3A CN102358181B (en) | 2011-08-30 | 2011-08-30 | Differential protection device and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110252583.3A CN102358181B (en) | 2011-08-30 | 2011-08-30 | Differential protection device and engineering machinery |
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| CN102358181A true CN102358181A (en) | 2012-02-22 |
| CN102358181B CN102358181B (en) | 2014-07-09 |
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| CN201110252583.3A Active CN102358181B (en) | 2011-08-30 | 2011-08-30 | Differential protection device and engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287258A (en) * | 2012-02-23 | 2013-09-11 | 杨泰和 | Multi-cvt drive system having epicycle gear set |
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| JP2735687B2 (en) * | 1990-11-15 | 1998-04-02 | 株式会社クボタ | Automatic diff lock device for vehicles |
| US6085138A (en) * | 1998-11-12 | 2000-07-04 | Caterpillar Inc. | Differential lock control system |
| JP2003237619A (en) * | 2002-02-21 | 2003-08-27 | Mitsubishi Heavy Ind Ltd | Differential lock switching device |
| CN201530415U (en) * | 2009-10-22 | 2010-07-21 | 中国重汽集团济南动力有限公司 | Novel differential gear protection device |
| CN201694053U (en) * | 2010-05-05 | 2011-01-05 | 中国重汽集团济南动力有限公司 | Differential lock control device |
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2011
- 2011-08-30 CN CN201110252583.3A patent/CN102358181B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2735687B2 (en) * | 1990-11-15 | 1998-04-02 | 株式会社クボタ | Automatic diff lock device for vehicles |
| US6085138A (en) * | 1998-11-12 | 2000-07-04 | Caterpillar Inc. | Differential lock control system |
| JP2003237619A (en) * | 2002-02-21 | 2003-08-27 | Mitsubishi Heavy Ind Ltd | Differential lock switching device |
| CN201530415U (en) * | 2009-10-22 | 2010-07-21 | 中国重汽集团济南动力有限公司 | Novel differential gear protection device |
| CN201694053U (en) * | 2010-05-05 | 2011-01-05 | 中国重汽集团济南动力有限公司 | Differential lock control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287258A (en) * | 2012-02-23 | 2013-09-11 | 杨泰和 | Multi-cvt drive system having epicycle gear set |
| CN109130847A (en) * | 2012-02-23 | 2019-01-04 | 杨泰和 | Has the multiple groups continuous variable speed drive system of cyclic train group |
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| CN102358181B (en) | 2014-07-09 |
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