CN102358181B - Differential protection device and engineering machinery - Google Patents
Differential protection device and engineering machinery Download PDFInfo
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- CN102358181B CN102358181B CN201110252583.3A CN201110252583A CN102358181B CN 102358181 B CN102358181 B CN 102358181B CN 201110252583 A CN201110252583 A CN 201110252583A CN 102358181 B CN102358181 B CN 102358181B
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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 one differential gear protection device.The invention still further relates to a kind of construction machinery and equipment with above-mentioned differential gear protection device.
Background technology
The working environment of hoisting crane is more severe, and the marshy area of often coming in and going out is opened diff lock (differential locking-device) when tyre skidding or while getting down hopeless in a quagmire and can improve the carrying capacity of automobile.But while using differential locking-device, vehicle can not be turned.Therefore, in operation process, chaufeur is opened differential locking-device, due to turning maloperation, is easy to damage diff.
Please refer to Fig. 1, the structural representation that Fig. 1 is existing a kind of typical differential-lock control.As shown in the figure, this differential-lock control comprises 24V power supply, fuse F1 (10A), shaft space difference speed rocker switch JK1, shaft space difference speed indicator lamp L1, shaft space difference speed electromagnetic valve DT1, differential rocker switch JK2 between wheel, differential indicator lamp L2 between wheel, differential electromagnetic valve DT2 between wheel, diode D1 and D2 and buzzer phone DL1, in the course of the work, in the time of hoisting crane vehicle process marshy area, chaufeur is opened differential rocker switch JK2 between shaft space difference speed rocker switch JK1 or wheel, between shaft space difference speed electromagnetic valve DT1 or wheel, differential electromagnetic gas valve DT2 obtains electric, buzzer phone DL1 pipes, diff lock is connected (being that differential locking-device is opened), between shaft space difference speed indicator lamp L1 or wheel, differential indicator lamp L2 lights, vehicle passes through marshy area smoothly.
In such scheme, if chaufeur maloperation in the situation that differential rocker switch is not closed is beaten bearing circle and turned, now differential locking-device, also in open mode, will inevitably damage diff.Therefore, urgently improve for existing scheme, to avoid because maloperation damages diff.
Summary of the invention
In view of this, to automatically terminate differential locking-device in order realizing when the Vehicular turn, to avoid, because chaufeur maloperation damages diff, on the one hand, the invention provides a kind of differential gear protection device.
This differential gear protection device is except comprising differential electromagnetic valve and obtaining for controlling this differential electromagnetic valve the differential rocker switch of electric or dead electricity; also comprise: differential control unit; when electric for obtaining at differential electromagnetic valve, determine whether vehicle turns to, and make differential electromagnetic valve in power failure state in the time determining Vehicular turn.
Preferably, described differential control unit comprises:
Whether steering state detecting unit, detect vehicle when electric for obtaining at differential electromagnetic valve and turn to;
Processing unit, for making differential electromagnetic valve in power failure state in the time that steering state detecting unit detects Vehicular turn.
Preferably, described differential electromagnetic valve comprises differential electromagnetic valve and shaft space difference speed electromagnetic valve between wheel, described differential rocker switch comprises for differential electromagnetic valve between control wheel and obtains differential rocker switch between the wheel of electric or dead electricity and obtain the shaft space difference speed rocker switch of electric or dead electricity for controlling shaft space difference speed electromagnetic valve, and described differential control unit makes between wheel differential electromagnetic valve and shaft space difference speed electromagnetic valve in power failure state in the time determining Vehicular turn.
Preferably, described differential control unit comprises relay, left position transduser and right position transduser, described relay has input circuit, the first output loop and the second output loop, described the first output loop, between wheel, between differential rocker switch and wheel, differential electromagnetic valve is series between power positive cathode mutually, described the second output loop, shaft space difference speed rocker switch and shaft space difference speed electromagnetic valve are series between power positive cathode mutually, the output loop of described left position transduser and described right position transduser is parallel with one another, one of them sys node is connected to the input circuit of relay, another sys node is connected to power cathode, described left position transduser and described right position transduser its output loop in the time Vehicular turn being detected is connected.
Preferably, the first output loop of described relay and the second output loop are normally off.
Preferably, the first output loop of described relay and the second output loop be series at respectively described take turns a differential rocker switch and described take turns between a differential electromagnetic valve and described shaft space difference speed rocker switch and described shaft space difference speed electromagnetic valve between; The input circuit of described relay is connected to respectively the node between described node and described shaft space difference speed rocker switch and described the second output loop of taking turns between a differential rocker switch and described the first output loop.
Preferably, described left position transduser is arranged on the left installing zone on Vehicular turn plumbing arm permanent seat, and this left installing zone is that steering drop arm permanent seat and steering drop arm swing the coincide left half-court of part of covering of the fan scope; Described right position transduser is arranged on the right installing zone on described steering drop arm permanent seat, and this right installing zone is that steering drop arm permanent seat and steering drop arm swing the right half-court that covering of the fan scope coincides.
Preferably, described left position transduser and described 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 the differential gear protection device described in above-mentioned any one.
Preferably, this project machinery is hoisting crane.
A kind of differential gear protection device provided by the invention and there is the construction machinery and equipment of this differential gear protection device; by at differential locking-device during in open mode; obtain when electric at differential electromagnetic valve; judge whether vehicle turns to; and in the time that definite vehicle turns to, making differential electromagnetic valve in power failure state, differential locking-device is removed; thereby effectively avoid diff to be damaged, extended the service life of diff.
Brief description of the drawings
Fig. 1 is the structural representation of existing a kind of typical differential-lock control;
The structured flowchart of a kind of differential gear protection device that Fig. 2 provides for the embodiment of the present invention.
Fig. 3 is the schematic diagram of a kind of concrete structure of differential gear protection device shown in Fig. 2;
Fig. 4 is the installation site schematic diagram of left and right position transduser in Fig. 3.
Detailed description of the invention
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be pointed out that in this part, the description to concrete structure and description order is only the explanation to specific embodiment, should not be considered as that protection scope of the present invention is had to any restriction.
Please refer to Fig. 2, the structured flowchart of a kind of differential gear protection device that Fig. 2 provides for the embodiment of the present invention.
As shown in Figure 2, this differential gear protection device comprises differential rocker switch 11, differential electromagnetic valve 12 and differential control unit 13, wherein:
Differential electromagnetic valve 12 is for controlling opening or closing of diff lock (differential locking-device), when differential electromagnetic valve 12 when electric, differential locking-device is opened, in the time of differential electromagnetic valve 12 dead electricity, differential locking-device is closed;
Differential rocker switch 11 is for controlling the on-state of differential electromagnetic valve 12, in the time of the muddy road of vehicle process, can differential electromagnetic valve be obtained by closed differential rocker switch 11 electric, thereby realize opening of differential locking-device, in the time that closed differential rocker switch 11 is opened, diff electromagnetic valve dead electricity, realizes closing of differential locking-device;
When differential control unit 13 is electric for obtaining at differential electromagnetic valve 12, determine whether vehicle turns to, and make differential electromagnetic valve 12 in power failure state in the time determining Vehicular turn, differential control unit 13 further comprises: whether steering state detecting unit 131, detect vehicle when electric for obtaining at differential electromagnetic valve 12 and turn to; Processing unit 132, for making differential electromagnetic valve 12 in power failure state in the time that steering state detecting unit 131 detects Vehicular turn.
Please refer to Fig. 3, the schematic diagram of a kind of concrete structure that Fig. 3 is above-mentioned differential gear protection device.
As shown in Figure 3; this differential gear protection device specifically comprises between 24V power supply, fuse F1 (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 F1 plays overload protection;
Between shaft space difference speed indicator lamp L1 and wheel, differential indicator lamp L2 is serially connected in respectively between power positive cathode; In the time that shaft space difference speed rocker switch JK1 opens, shaft space difference speed indicator lamp L1 lights, and in the time that between wheel, differential rocker switch JK2 opens, between wheel, differential indicator lamp L2 lights.
Relay K A1 has two normally closed contacts (i.e. the output loop in normally off), comprises the first normally closed contact (the first output loop) and the second normally closed contact (the second output loop);
Shaft space difference speed rocker switch JK1, the first normally closed contact and shaft space difference speed electromagnetic valve DT1 are series between power positive cathode successively mutually; Between wheel, between differential rocker switch JK2, the second normally closed contact and wheel, differential electromagnetic valve DT2 is series between power positive cathode successively mutually;
One end of the wire loop (input circuit) of relay K A1 is connected in the node between differential rocker switch JK2 and the second normally closed contact between node between shaft space difference speed rocker switch JK1 and the first normally closed contact and wheel by diode D3 and D4 respectively; Diode D3 and D4 play the effect of reverse connecting protection
The output loop of left 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;
One end of buzzer phone DL1 is connected in the connecting joint between differential electromagnetic valve DT2 between connecting joint between the first normally closed contact and shaft space difference speed electromagnetic valve DT1 and the second normally closed contact and wheel by diode D1 and D2 respectively, and the other end is connected in power cathode.
Left position transduser K1 and right position transduser K2 are inductance approach switch, please refer to Fig. 3, and Fig. 3 is the installation site schematic diagram of left position transduser K1 and right position transduser K2.Steering drop arm 1 is arranged on steering drop arm permanent seat (not shown), when left-handed turning Moving plate, drives the mechanisms such as steering column drag link to drive steering drop arm 1 to swing left; Turning clockwise steering handwheel, drives steering column, drives steering drop arm to swing to the right by mechanisms such as steering drag links.Swaying direction, the amplitude of steering drop arm 1 are corresponding with direction, amplitude that steering handwheel rotates, that is, the relative position of steering drop arm 1 and steering drop arm permanent seat has 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 arranged on to the special mounting region on steering drop arm permanent seat, can ensures that position transduser detects position signal the in good time output switch amount of steering drop arm 1 reliably, makes the wire loop conducting of relay K A1.
As shown in Figure 3, in the time that automobile turning wheel reaches left-limit steering position from meta, steering drop arm 1 is pendulum angle θ (as 32 °) left.In like manner, when steering handwheel is got to 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 ensure to detect reliably the position signal of steering drop arm 1, position transduser is installed on steering drop arm permanent seat and steering drop arm 1 swings in the region of intersection of covering of the fan.Wherein, left position transduser K3 is arranged on steering drop arm permanent seat and steering drop arm 1 and swings covering of the fan scope and coincide in the left half-court of part, is called left installing zone; Right position transduser K4 is arranged on steering drop arm permanent seat and steering drop arm 1 and swings the coincide right half-court of part of covering of the fan scope, is called right installing zone.
As shown in Figure 3, preferably, described left installing zone is near region A, 2 lines of B, A point is left start of installation, the projection that during for left-limit steering position, steering drop arm 1 left border is on steering drop arm permanent seat apart from upper end approximately 1/4, B point is left installation terminal, and during for left-limit steering position, steering drop arm 1 right border is in the projection on steering drop arm permanent seat apart from the upper first lunar month 1/2.Preferably, it is described that to have installing zone be near region C, 2 lines of D, C point is right start of installation, during for limit on the right-right-hand limit steering position, steering drop arm 1 right border is in the projection on steering drop arm permanent seat apart from the upper first lunar month 1/4, D point is right installation terminal, the projection that during for limit on the right-right-hand limit steering position, steering drop arm 1 left border is on steering drop arm permanent seat apart from upper end approximately 1/2.In this preferred fitting limit, in the time that steering drop arm 1 swings, the signal amplitude that position transduser detects there will not be large drop, is therefore convenient to adjust its sensitivity and installation site.
In concrete operation process, in the time that Vehicle Driving Cycle is on muddy road, in order to improve vehicle carrying capacity, chaufeur is opened differential rocker switch JK2 between shaft space difference speed rocker switch JK1 and/or wheel, between shaft space difference speed indicator lamp L1 and/or wheel, differential indicator lamp L2 lights, between shaft space difference speed electromagnetic valve DT1 and/or wheel, differential electromagnetic valve DT2 obtains electricly, and differential locking-device is opened, diff locking; Now, the steering handwheel if chaufeur turns left (even vehicle left-handed turning to), steering handwheel drives steering column, drives spindle arm 1 to swing left by mechanisms such as steering drag links, has 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 disconnect, 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, drives spindle arm 1 to swing to the right by mechanisms such as steering drag links, has 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 disconnect, differential electromagnetic valve DT1 and DT2 dead electricity, differential locking-device is closed, and avoids diff to be damaged.
It should be noted that, in above-described embodiment or in other embodiment, can also use as required the position transduser of other types, such as magnetic induction type approach switch, mechanical type approach switch etc.; The installation site of position transduser is also not limited to above-mentioned installation site in addition, also can be arranged on as required on other positions, only otherwise impact detects the steering state of vehicle.
It should be noted that, in above-described embodiment, two normally closed contacts of relay K A1 can be serially connected with respectively between shaft space difference speed rocker switch JK1 and shaft space difference speed electromagnetic valve DT1 and wheel between differential rocker switch JK2 with take turns between between differential electromagnetic valve DT2 (as shown in Figure 3), also can be serially connected with respectively other positions, for example, can also be serially connected with respectively between positive source and shaft space difference speed rocker switch JK1 and between positive source and wheel between differential electromagnetic valve DT2, or be serially connected with respectively between shaft space difference speed electromagnetic valve DT1 and power cathode and between power cathode and wheel between differential electromagnetic valve DT2.
It should be noted that, in above-described embodiment, one end of relay K A1 wire loop can be respectively be connected in the connecting joint between differential rocker switch JK2 and the second normally closed contact between connecting joint between shaft space difference speed rocker switch JK1 and the first normally closed contact and wheel by diode D3 and D4, also can be connected in other relevant positions by diode D3 and D4 respectively, for example, be connected in the connecting joint between differential electromagnetic valve DT2 between connecting joint between the first normally closed contact and shaft space difference speed electromagnetic valve DT1 and the second normally closed contact and wheel by diode D3 and D4 respectively.
It should be noted that, in above-described embodiment, only use a relay K A1 to carry out synchro control to the on-state of two differential electromagnetic valve DT1 and DT2, but in other embodiments, also can use as required two relays respectively the on-state of DT1 and DT2 to be controlled, its implementation procedure is similar to the above, does not hereby repeat.
It should be noted that, in above-described embodiment, use by relay K A1, diode D3 and D4, the control circuit of left position transduser K1 and right position transduser K2 composition is 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 to this, can also use other modes to realize, for example, can directly analyze the operational factor of vehicle by the mode of software or hardware, judge whether vehicle turns to, and in the time of definite turning to, drive differential electromagnetic valve DT1 and DT2 to close.
It should be noted that, in specific implementation process, differential control unit 13 can be made up of the unit (module) of realizing corresponding function, for example, while realization by hardware mode, steering state detecting unit 131 can be integrated on Same Physical entity with processing unit 132, also can make independently two unit.
A kind of differential gear protection device that the embodiment of the present invention provides; can be at differential locking-device during in open mode; obtain when electric at differential electromagnetic valve; detect the steering state of vehicle by left and right position transduser; in the time that vehicle turns to; the output loop of left and right position transduser is connected; make the wire loop conducting of relay; two normally closed contacts of relay disconnect; make differential electromagnetic valve in power failure state; differential locking-device is removed, thereby effectively avoids diff to be damaged, and has extended the service life of diff.
The embodiment of the present invention also provides a kind of construction machinery and equipment (as hoisting crane); this project machinery has above-mentioned differential gear protection device; because above-mentioned differential gear protection device has above-mentioned technique effect; therefore; the construction machinery and equipment with this differential gear protection device also should possess corresponding technique effect; its specific implementation process is similar to the above embodiments, does not hereby repeat.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode of software combined with hardware platform, can certainly all implement by hardware.Based on such understanding, what technical scheme of the present invention contributed to background technology can embody with the form of software product in whole or in part, this software product can be stored in storage medium, as ROM/RAM, magnetic disc and CD etc., comprise that some instructions for example, in order to make a computer equipment (can be Personal Computer, server or the network equipment etc.) carry out the content described in some part of each embodiment of the present invention or embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a differential gear protection device, comprise differential electromagnetic valve and obtain the differential rocker switch of electric or dead electricity for controlling this differential electromagnetic valve, it is characterized in that, described differential gear protection device also comprises: differential control unit, when electric for obtaining at differential electromagnetic valve, determine whether vehicle turns to, and make differential electromagnetic valve in power failure state in the time determining Vehicular turn, described differential electromagnetic valve comprises differential electromagnetic valve and shaft space difference speed electromagnetic valve between wheel, described differential rocker switch comprises for differential electromagnetic valve between control wheel and obtains differential rocker switch between the wheel of electric or dead electricity and obtain the shaft space difference speed rocker switch of electric or dead electricity for controlling shaft space difference speed electromagnetic valve, and described differential control unit makes between wheel differential electromagnetic valve and shaft space difference speed electromagnetic valve in power failure state in the time determining Vehicular turn, described differential control unit comprises relay, left position transduser and right position transduser, described relay has input circuit, the first output loop and the second output loop, described the first output loop, between wheel, between differential rocker switch and wheel, differential electromagnetic valve is series between power positive cathode mutually, described the second output loop, shaft space difference speed rocker switch and shaft space difference speed electromagnetic valve are series between power positive cathode mutually, the output loop of described left position transduser and described right position transduser is parallel with one another, one of them sys node is connected to the input circuit of relay, another sys node is connected to power cathode, described left position transduser and described right position transduser its output loop in the time Vehicular turn being detected is connected.
2. differential gear protection device as claimed in claim 1, is characterized in that, the first output loop of described relay and the second output loop are normally off.
3. differential gear protection device as claimed in claim 2, is characterized in that: the first output loop of described relay and the second output loop be series at respectively described take turns a differential rocker switch and described take turns between a differential electromagnetic valve and described shaft space difference speed rocker switch and described shaft space difference speed electromagnetic valve between; The input circuit of described relay is connected to respectively the node between described node and described shaft space difference speed rocker switch and described the second output loop of taking turns between a differential rocker switch and described the first output loop.
4. differential gear protection device as claimed in claim 3, it is characterized in that, described left position transduser is arranged on the left installing zone on Vehicular turn plumbing arm permanent seat, and this left installing zone is that steering drop arm permanent seat and steering drop arm swing the coincide left half-court of part of covering of the fan scope; Described right position transduser is arranged on the right installing zone on described steering drop arm permanent seat, and this right installing zone is that steering drop arm permanent seat and steering drop arm swing the right half-court that covering of the fan scope coincides.
5. differential gear protection device as claimed in claim 4, is characterized in that, described left position transduser and described right position transduser are inductance approach switch.
6. a construction machinery and equipment, is characterized in that, described construction machinery and equipment has the differential gear protection device as described in claim 1 to 5 any one.
7. construction machinery and equipment as claimed in claim 6, is characterized in that, described construction machinery and equipment is 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN102358181A CN102358181A (en) | 2012-02-22 |
| CN102358181B true CN102358181B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8852043B2 (en) * | 2012-02-23 | 2014-10-07 | Tai-Her Yang | Multi-CVT drive system having differential epicycle gear set |
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 |
-
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 |
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