CN203604616U - High-and-low-gear gearbox, protection mechanism thereof and vehicle - Google Patents
High-and-low-gear gearbox, protection mechanism thereof and vehicle Download PDFInfo
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- CN203604616U CN203604616U CN201320765706.8U CN201320765706U CN203604616U CN 203604616 U CN203604616 U CN 203604616U CN 201320765706 U CN201320765706 U CN 201320765706U CN 203604616 U CN203604616 U CN 203604616U
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- gas circuit
- gas
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- clutch booster
- low shift
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Abstract
The utility model relates to a high-and-low-gear gearbox, a protection mechanism of the high-and-low-gear gearbox and a vehicle. The high-and-low-gear gearbox comprises a gas circuit reversing valve, a gear shifting air cylinder and a clutch booster, and the gas circuit reversing valve is provided with a gas inlet and a gas outlet; the gear shifting air cylinder is provided with a gas port; the gas outlet of the gas circuit reversing valve is respectively communicated with the gas port in the gear shifting air cylinder to form a low-gear gas circuit and a high-circuit gas circuit; the clutch booster is provided with a gas inlet and a gas taking opening; the gas inlet of the clutch booster is located in the constant gas supply state; the gas taking opening of the clutch booster is connected with the gas inlet of the gas circuit reversing valve; a clutch pedal is treaded on for a preset distance, the gas taking opening of the clutch booster is converted into the gas supply state from the closed state, compressed air enters the gas circuit reversing valve through the clutch booster, the low-gear gas circuit or the high-gear gas circuit is made to be in the opening state by the gas circuit reversing valve according to the high-and-low-gear switch positions on an operating handle, and high-and-low-gear switching is completed. Damage to a synchronizer of the gearbox caused by improper operation of a driver can be prevented.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of high and low shift gearbox and protection mechanism thereof, vehicle.
Background technique
The conventional band high and low shift gearbox of vehicle as without high and low shift protection mechanism in the time that needs switch high and low shift, driver should and pluck after shelves at let slip the clutch, then carries out high and low shift switching, and then hangs into suitable gear.This sequence of operation can guarantee that the main tank of gear box sub-case gearbox in the time carrying out high and low shift switching has cut off power, thus protection odd-side gear synchronous device.If but hanging into certain gear when gearbox, driver is directly switched high and low shift due to misoperation, can cause Gearbox Fault.Describe below by concrete accompanying drawing.
Shown in Fig. 1 is the conventional band of vehicle high and low shift gearbox Joystick.As shown in Figure 1, normal open gas in gas circuit S, when high and low shift switch is during in low gear position 1 ', gas circuit S and gas circuit P connect, and make shifting cylinder in low gear position thereby control transmission gear gas path selector valve; When high and low shift switch is during in high-grade position 2 ', gas circuit S and gas circuit P disconnect, and make shifting cylinder in high-grade position thereby control transmission gear gas path selector valve.
In gearbox high and low shift handoff procedure, Joystick gas circuit is connected with vehicle air-channel system all the time, if driver is in the unsegregated situation of clutch, because misoperation is stirred high and low shift switch, will make gearbox in the situation that not cutting off power, force gearshift, because high and low shift velocity ratio changes greatly, be therefore easy to cause gear box sub-case synchronizer to damage.
Part gearbox switches and is provided with high and low shift gearbox protection mechanism for high and low shift at present, and as shown in Figure 2, wherein gas path control valve 3 ' suction port is connected with vehicle air feed gas circuit, and air outlet is connected with gearbox reversing control valve.The trigger mechanism 4 ' of dying is arranged on gearbox shifting declutch shift shaft 5 '.When gearbox is during in neutral gear position, gas path control valve 3 ' is not triggered, and gearbox shifting gas circuit is in on-state, and now gas path control valve 3 ' can carry out high and low shift and switch action.In the time that gearbox is hung into certain gear, gearshift protection mechanism state as shown in Figure 3, now press by gas path control valve 3 ' the switch trigger mechanism 2 ' of being died, and gearbox shifting gas circuit is in off state, and now gas circuit selector valve can not carry out high and low shift and switch action.Therefore when driver is not in the situation that plucking gear (gearbox power does not cut off), because misoperation is switched high and low shift switch, gearbox can not carry out high and low shift yet and switch action, thereby has protected gearbox.
But still there is following shortcoming in existing high and low shift gearbox protection mechanism:
(1) need to change gearbox internal structure, reduce property easy to maintenance and the reliability of gearbox.
(2) this kind of high and low shift protection mechanism strengthened by the restriction of gearbox producer, as gearbox itself does not arrange this protection mechanism, just main frame producer can not switch and protect the height of gearbox, is unfavorable for that main frame producer improves the hommization degree of its vehicle.
Model utility content
The purpose of this utility model is to propose a kind of high and low shift gearbox and protection mechanism thereof, vehicle, and it can prevent that the Synchromous device of gearbox causing because driver's operation is improper from damaging.
For achieving the above object, the utility model provides following technological scheme:
A kind of high and low shift gearbox protection mechanism, comprises gas circuit selector valve, gear shifting cylinder and clutch booster, wherein: gas circuit selector valve has a suction port and two air outlets; Gear shifting cylinder has two gas ports; Two air outlets of gas circuit selector valve are connected with a gas port on gear shifting cylinder respectively, form a low-grade gas circuit and a high-grade gas circuit; Clutch booster has suction port and air hatch; The suction port of clutch booster is in the normal gaseity that supplies; The air hatch of clutch booster is connected to the suction port of gas circuit selector valve; Clutch pedal is stepped on predeterminable range, the air hatch of clutch booster is transformed into for gaseity by closed condition, pressurized air enters into gas circuit selector valve through clutch booster, gas circuit selector valve makes low-grade gas circuit or high-grade gas circuit in open mode according to the position of high and low shift switch on operating grip, and high and low shift has switched.
Further, clutch booster comprises piston, driveshaft assembly and valve, wherein: piston is fixedly connected with driveshaft assembly; In the time that clutch pedal is stepped on, piston and driveshaft assembly are towards a side shifting, and in the time that displacement distance is greater than predefined value, valve is opened by driveshaft assembly, and air hatch is in supplying gaseity.
Further, also comprise the first gas circuit and the second gas circuit; Gas circuit selector valve also has the first control mouth and second and controls mouth; First controls mouth is connected with the first gas circuit; Second controls mouth is connected with the second gas circuit; High and low shift switch is under low gear position state, and the first gas circuit and the second gas circuit are connected, and low-grade gas circuit is opened; High and low shift switch is under high tap position configuration state, and the first gas circuit and the second gas circuit disconnect, and high-grade gas circuit is opened.
Further, also comprise air filtering core regulator, wherein: air filtering core regulator has suction port and air outlet; The air hatch of clutch booster is connected to the suction port of air filtering core regulator; The air outlet of air filtering core regulator is connected to the suction port of gas circuit selector valve; Pressurized air arrives air filtering regulator through clutch booster, after filtration and pressure regulation, enters into gas circuit selector valve.
A kind of high and low shift gearbox that comprises the high and low shift gearbox protection mechanism in the various embodiments described above.
A kind of vehicle that comprises the high and low shift gearbox in above-described embodiment.
Based on technique scheme, the utility model has the advantages that:
Because the utility model is on the basis of structure of clutch booster with suction port and air hatch, make the suction port of clutch booster in the normal gaseity that supplies, the air hatch of clutch booster is connected to the suction port of gas circuit selector valve, step on predeterminable range at clutch pedal, the air hatch of clutch booster is transformed into for gaseity by closed condition, pressurized air enters into gas circuit selector valve through clutch booster, gas circuit selector valve makes low-grade gas circuit or high-grade gas circuit in open mode according to the position of high and low shift switch on operating grip, thereby completing high and low shift switches, even if driver's operation is improper, do not pluck gear or directly do not carrying out high and low shift switching stepping on clutch pedal in the situation that, now because clutch pedal is not stepped on, clutch booster air hatch is not opened, gearbox just can not carry out high and low shift and switch action, that is to say, only have when after driver's let slip the clutch, after having cut off the power of gearbox, just can carry out high and low shift switching, thereby realize the effective protection to gearbox.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the conventional structural representation with high and low shift gearbox Joystick of vehicle in prior art;
Fig. 2 be in prior art high and low shift gearbox protection mechanism at gearbox the view in neutral position;
Fig. 3 is that in prior art, high and low shift gearbox protection mechanism is hung the view into certain gear at gearbox;
Fig. 4 is the principle schematic of high and low shift gearbox protection mechanism provided by the utility model;
Fig. 5 is the structural representation of clutch aid in Fig. 4.
Embodiment
For making object of the invention process, technological scheme and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Described embodiment is the present invention's part embodiment, rather than whole embodiments.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limiting the scope of the invention.
As shown in Figure 4, Figure 5, high and low shift gearbox provided by the utility model comprises gas circuit selector valve 1, gear shifting cylinder 2 and clutch booster 3, wherein: gas circuit selector valve 1 has a suction port and two air outlets.Gear shifting cylinder 2 has two gas ports.Two air outlets of gas circuit selector valve 1 are connected with a gas port on gear shifting cylinder 2 respectively, form a low-grade gas circuit and a high-grade gas circuit.Clutch booster 3 has suction port 3-1 and air hatch 3-2, and the suction port 3-1 of clutch booster 3 wherein and compressed gas source (in figure for illustrating) directly communicate, in normal for gaseity.The air hatch 3-2 of clutch booster 3 is connected to the suction port of gas circuit selector valve 1, and air hatch 3-2 is closed condition in the time that clutch pedal is not stepped on.
Clutch pedal is stepped on predeterminable range, the air hatch of clutch booster is transformed into for gaseity by closed condition, pressurized air enters into gas circuit selector valve through clutch booster, gas circuit selector valve makes low-grade gas circuit or high-grade gas circuit in open mode according to the position of high and low shift switch on operating grip, and high and low shift has switched.If driver's operation is improper; do not pluck gear or directly do not carrying out high and low shift switching stepping on clutch pedal in the situation that; now because clutch pedal is not stepped on; clutch booster air hatch is not opened, and gearbox just can not carry out high and low shift and switch action, that is to say; only have when after driver's let slip the clutch; after having cut off the power of gearbox, just can carry out high and low shift switching, thereby realize the effective protection to gearbox.
In above-described embodiment, clutch booster 3 comprises piston 3-3, driveshaft assembly 3-4, valve 3-5 and push rod 3-6, wherein: one end of push rod 3-6 separates rocking arm (not shown) and is fixedly connected with speed change box clutch, when clutch pedal is stepped on push rod 3-6 towards the left in Fig. 5 to motion.Piston 3-3 is fixedly connected with driveshaft assembly 3-4.Clutch pedal is stepped on, and the piston 3-3 of clutch booster 3 and driveshaft assembly 3-4 move towards left side, and in the time that displacement distance is greater than predefined value, valve 3-5 is opened by driveshaft assembly 3-4, and air hatch 3-2 is in supplying gaseity.Now, pressurized air enters from suction port 3-1, arrives gas circuit selector valve 1 via air hatch 3-2, and gas circuit selector valve 1, according to the position of high and low shift switch on operating grip 4, opens the low-grade gas circuit of gear shifting cylinder 2 or high-grade gas circuit, thereby completes the switching of high and low shift.
In the various embodiments described above, high and low shift gearbox provided by the utility model also comprises the first gas circuit S and the second gas circuit P.Gas circuit selector valve 1 also has the first control mouth and second to be controlled mouthful, and first control and mouthful be connected with the first gas circuit S, and second controls mouth is connected with the second gas circuit P.High and low shift switch is under low gear position state, and the first gas circuit S and the second gas circuit P connect, and low-grade gas circuit is opened.High and low shift switch is under high tap position configuration state, and the first gas circuit S and the second gas circuit P disconnect, and high-grade gas circuit is opened.
In the various embodiments described above, high and low shift gearbox provided by the utility model also comprises air filtering core regulator 5, wherein: air filtering core regulator 5 has suction port and air outlet, the air hatch of clutch booster 3 is connected to the suction port of air filtering core regulator 5, and the air outlet of air filtering core regulator 5 is connected to the suction port of gas circuit selector valve 1.Pressurized air arrives air filtering regulator 5 through clutch booster 3, after filtration and pressure regulation, enters into gas circuit selector valve 1.
The high and low shift gearbox of the high and low shift gearbox protection mechanism in a kind of the various embodiments described above that the utility model also provides.The other parts of described high and low shift gearbox are prior art, no longer launch to describe at this.
The utility model also provides a kind of vehicle that comprises the high and low shift gearbox in above-described embodiment, and the other parts of described vehicle are prior art, do not repeat them here.After having adopted high and low shift gearbox provided by the utility model, vehicle control gas circuit enters into the air filtering regulator 5 of gearbox by clutch booster 3, thereby then enters into gas circuit selector valve 1 and realize the control to gear shifting cylinder 2.Driver is switching when high and low shift not and need to, according to particular order (step on clutch-pluck shelves-switch high and low shift-engage a gear-loosen the clutch), prevent that driver is because misoperation is damaged gearbox.Clutch booster is simple in structure, reliable to the control mode of gearbox high and low shift gas circuit, easy to maintenance.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characteristics is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (6)
1. a high and low shift gearbox protection mechanism,
Comprise gas circuit selector valve, gear shifting cylinder and clutch booster, wherein:
Gas circuit selector valve has a suction port and two air outlets;
Gear shifting cylinder has two gas ports;
Two air outlets of gas circuit selector valve are connected with a gas port on gear shifting cylinder respectively, form a low-grade gas circuit and a high-grade gas circuit;
It is characterized in that:
Clutch booster has suction port and air hatch;
The suction port of clutch booster is in the normal gaseity that supplies;
The air hatch of clutch booster is connected to the suction port of gas circuit selector valve;
Clutch pedal is stepped on predeterminable range, the air hatch of clutch booster is transformed into for gaseity by closed condition, pressurized air enters into gas circuit selector valve through clutch booster, gas circuit selector valve makes low-grade gas circuit or high-grade gas circuit in open mode according to the position of high and low shift switch on operating grip, and high and low shift has switched.
2. high and low shift gearbox protection mechanism as claimed in claim 1,
It is characterized in that:
Clutch booster comprises piston, driveshaft assembly and valve, wherein:
Piston is fixedly connected with driveshaft assembly;
Clutch pedal is stepped on, and clutch booster piston and driveshaft assembly are towards a side shifting, and in the time that displacement distance is greater than predefined value, valve is opened by driveshaft assembly, and air hatch is in supplying gaseity.
3. high and low shift gearbox protection mechanism as claimed in claim 2,
It is characterized in that:
Also comprise the first gas circuit and the second gas circuit;
Gas circuit selector valve also has the first control mouth and second and controls mouth;
First controls mouth is connected with the first gas circuit;
Second controls mouth is connected with the second gas circuit;
High and low shift switch is under low gear position state, and the first gas circuit and the second gas circuit are connected, and low-grade gas circuit is opened;
High and low shift switch is under high tap position configuration state, and the first gas circuit and the second gas circuit disconnect, and high-grade gas circuit is opened.
4. high and low shift gearbox protection mechanism as claimed in claim 3,
It is characterized in that:
Also comprise air filtering core regulator, wherein:
Air filtering core regulator has suction port and air outlet;
The air hatch of clutch booster is connected to the suction port of air filtering core regulator;
The air outlet of air filtering core regulator is connected to the suction port of gas circuit selector valve;
Pressurized air arrives air filtering regulator through clutch booster, after filtration and pressure regulation, enters into gas circuit selector valve.
5. one kind comprises the high and low shift gearbox of the high and low shift gearbox protection mechanism as described in any one in claim 1-4.
6. one kind comprises the vehicle of high and low shift gearbox as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765706.8U CN203604616U (en) | 2013-11-28 | 2013-11-28 | High-and-low-gear gearbox, protection mechanism thereof and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765706.8U CN203604616U (en) | 2013-11-28 | 2013-11-28 | High-and-low-gear gearbox, protection mechanism thereof and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604616U true CN203604616U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320765706.8U Expired - Fee Related CN203604616U (en) | 2013-11-28 | 2013-11-28 | High-and-low-gear gearbox, protection mechanism thereof and vehicle |
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| CN (1) | CN203604616U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179958A (en) * | 2014-07-18 | 2014-12-03 | 徐州重型机械有限公司 | Gear shifting power-assisted mechanism and automobile crane |
| CN105840817A (en) * | 2016-06-02 | 2016-08-10 | 陕西法士特齿轮有限责任公司 | Control air circuit structure for transmission |
| CN106051139A (en) * | 2016-08-12 | 2016-10-26 | 中国第汽车股份有限公司 | Pneumatic gear shifting control system assembly for auxiliary box of multi-gear transmission |
| CN108533743A (en) * | 2018-04-08 | 2018-09-14 | 湖北正信齿轮制造股份有限公司 | Construction machinery gear box self shifter and positive and negative rotation control system and its control method |
| CN110030372A (en) * | 2019-05-14 | 2019-07-19 | 中国重汽集团成都王牌商用车有限公司 | A kind of vehicle gas control subcommutation gear system comprising handle ball head valve |
-
2013
- 2013-11-28 CN CN201320765706.8U patent/CN203604616U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179958A (en) * | 2014-07-18 | 2014-12-03 | 徐州重型机械有限公司 | Gear shifting power-assisted mechanism and automobile crane |
| CN104179958B (en) * | 2014-07-18 | 2016-08-24 | 徐州重型机械有限公司 | Power assisted gearshift mechanism and autocrane |
| CN105840817A (en) * | 2016-06-02 | 2016-08-10 | 陕西法士特齿轮有限责任公司 | Control air circuit structure for transmission |
| CN106051139A (en) * | 2016-08-12 | 2016-10-26 | 中国第汽车股份有限公司 | Pneumatic gear shifting control system assembly for auxiliary box of multi-gear transmission |
| CN108533743A (en) * | 2018-04-08 | 2018-09-14 | 湖北正信齿轮制造股份有限公司 | Construction machinery gear box self shifter and positive and negative rotation control system and its control method |
| CN110030372A (en) * | 2019-05-14 | 2019-07-19 | 中国重汽集团成都王牌商用车有限公司 | A kind of vehicle gas control subcommutation gear system comprising handle ball head valve |
| CN110030372B (en) * | 2019-05-14 | 2024-04-16 | 中国重汽集团成都王牌商用车有限公司 | Vehicle pneumatic control auxiliary gear shifting system comprising handle ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20201128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |