CN204403350U - Three site dynamic formula gearshifts - Google Patents
Three site dynamic formula gearshifts Download PDFInfo
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- CN204403350U CN204403350U CN201420850031.1U CN201420850031U CN204403350U CN 204403350 U CN204403350 U CN 204403350U CN 201420850031 U CN201420850031 U CN 201420850031U CN 204403350 U CN204403350 U CN 204403350U
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- gearshift
- shifting shaft
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- hood
- cast aluminium
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Abstract
The utility model relates to a kind of three site dynamic formula gearshifts, comprises cylinder head, cast aluminium cylinder, protecgulum, gearshift tail-hood, rear case, shift fork, shifting shaft.Cast aluminium cylinder is fixed on protecgulum, and gearshift tail-hood is fixed on rear case, and shifting shaft runs through protecgulum and rear case, and its rear and front end puts in cast aluminium cylinder and gearshift tail-hood respectively.Large piston loads the heavy caliber section in cast aluminium cylinder, and middle piston inner hole is sleeved on the front portion of shifting shaft, and cylindrical is nested in large piston, and small piston inner hole sleeve is contained in the front portion of shifting shaft, and cylindrical is nested in small-bore section in cast aluminium cylinder.Gearshift tail-hood arranges the locking ball guide pin bushing of built-in spring and steel ball, forms self-locking mechanism with shifting shaft afterbody.Cylinder head and gearshift tail-hood arrange stop screw and locking nut respectively, in the intermediate portion of shifting shaft, shift fork is installed, and locates with hollow screw.The utility model apparatus structure is simple, easy to manufacture, easy to operate, with low cost, convenient for maintaining.
Description
Technical field
The utility model relates to vehicle drive system technical field, is specifically related to a kind of automotive gearbox three site dynamic formula gearshift.
Background technique
Along with science and technology constantly progress, for improving power performance and load-carrying ability, often need to design Multi-stage transmission system on chassis, the gearshift as critical component determines reliability and the working life of transmission system to a certain extent.At present, automotive gearbox gearshift mode can be divided into mechanism hand dynamic formula, electrical-control hydraulic and electric-controlled pneumatic type, wherein, electric-controlled pneumatic type is generally normal opened type, gearshift is controlled by electromagnetic valve intake and exhaust, on-state must be in when gearshift completes rear electromagnetic valve always, namely lock gear positions by ventilating always.The deficiency of this kind of gearshift is: the first, and solenoid valve is connected for a long time and caused hot-wire coil to generate heat seriously, the lost of life; The second, ventilate always and easily cause seal leakage, air pressure once leakage or interruption will cause out of supply, thus causes soldered tooth to produce high speed impact, and gear-box engaging tooth will be made in the short time to beat tooth, disabler; 3rd, a gear needs two inlet holes to ventilate simultaneously, and Sealing adopts Y type leather cup, and Y type leather cup can only bear unidirectional stressed, therefore causes apparatus structure more complicated, and number of spare parts is many, and maintainalbility is poor.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defect, provides the three site dynamic formula gearshifts that a kind of structure is simple, easy to manufacture, maintenance is good, reliability is high.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of three site dynamic formula gearshifts, comprise cylinder head 1, cast aluminium cylinder 2, protecgulum 6, gearshift tail-hood 10, rear case 14, shift fork 16, shifting shaft 17, wherein, protecgulum 6 and rear case 14 are buckled into casing.Cast aluminium cylinder 2 is fixed on protecgulum 6, and gearshift tail-hood 10 is fixed on rear case 14, and shifting shaft 17 runs through protecgulum 6 and rear case 14, and its rear and front end puts in cast aluminium cylinder 2 and gearshift tail-hood 10 respectively; Large piston 3 is loaded the heavy caliber section in cast aluminium cylinder 2 and is sealed by large piston O RunddichtringO 22, middle piston 4 inner hole sleeve is contained in the front portion of shifting shaft 17 and is sealed by shifting shaft O RunddichtringO 20, cylindrical to be nested in large piston 3 and to be sealed by middle piston O RunddichtringO 21, small piston 5 inner hole sleeve is contained in the front portion of shifting shaft 17 and is sealed by shifting shaft O RunddichtringO 20, cylindrical is nested in small-bore section in cast aluminium cylinder 2 and is sealed by small piston O RunddichtringO 19, composition power mechanism; Gearshift tail-hood 10 arranges the locking ball guide pin bushing 7 of built-in spring 8 and steel ball 9, forms self-locking mechanism with shifting shaft 17 afterbody; Cylinder head 1 and gearshift tail-hood 10 arrange anterior stop screw 24 and rear portion stop screw 11 and locking nut 12 respectively; Install hexagon thin nut 23 in the front end of shifting shaft 17, shift fork 16 is installed at position therebetween, and locates with hollow screw 15, is sealed between shifting shaft 17 and cast aluminium cylinder 2 by cylinder O RunddichtringO 18.
One of preferably, mill 1mm at shifting shaft 17 afterbody along radial direction, and being also milled with 3 semi-circular recesses with the cylindrical place that coordinates of steel ball 9 in locking ball guide pin bushing 7, steel ball 9 can embed in any one groove.
One of preferably, the semi-circular recesses degree of depth is 3 ~ 4mm, radius of arc is R5 ~ 5.5mm, and adjacent two groove center distances are 2mm.
One of preferably, steel ball 9 diameter is 10mm.
One of preferably, gearshift tail-hood 10 is provided with indicator cock 13.
The utility model three site dynamic formula gearshift to be ventilated respectively to the vent of three on cylinder by electromagnetic valve source of the gas and is realized the switching of three gears, can disconnect solenoid valve after gear hangs up; Effectively can there is out of supply or trip stop phenomenon by avoiding device in self-locking device, improve automobile reliability; Two ends adjustment screw effectively can limit the axial displacement of shifting shaft, reduces shift shock and shift fork wearing and tearing, improves gearshift reliability; Only need change seal ring type, just can realize electric-controlled hydraulic gearshift, be easy to the conversion of gearshift mode.Therefore, simple, easy to manufacture, easy to operate, with low cost, the convenient for maintaining of structure.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of the utility model three site dynamic formula gearshift.
In figure: 1-cylinder head, 2-cast aluminium cylinder, the large piston of 3-, piston in 4-, 5-small piston, 6-protecgulum, 7-locking ball guide pin bushing, 8-spring, 9-steel ball, 10-shifts gears tail-hood, 11-rear portion stop screw, 12-locking nut, 13-indicator cock, 14-rear case, 15-hollow screw, 16-shift fork, 17-shifting shaft, 18-cylinder O RunddichtringO, 19-small piston O RunddichtringO, 20-shifting shaft O RunddichtringO, piston O RunddichtringO in 21-, 22-large piston O RunddichtringO, 23-hexagon thin nut, the anterior stop screw of 24-, I, II, III-compressed air inlet.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
As shown in Figure 1, three site dynamic formula gearshifts comprise cylinder head 1, cast aluminium cylinder 2, protecgulum 6, gearshift tail-hood 10, rear case 14, shift fork 16, shifting shaft 17, and wherein, protecgulum 6 and rear case 14 are buckled into casing.Cast aluminium cylinder 2 is fixed on protecgulum 6, and gearshift tail-hood 10 is fixed on rear case 14, and shifting shaft 17 runs through protecgulum 6 and rear case 14, and its rear and front end puts in cast aluminium cylinder 2 and gearshift tail-hood 10 respectively.
Large piston 3 is loaded the heavy caliber section in cast aluminium cylinder 2 and is sealed by large piston O RunddichtringO 22, middle piston 4 inner hole sleeve is contained in the front portion of shifting shaft 17 and is sealed by shifting shaft O RunddichtringO 20, cylindrical to be nested in large piston 3 and to be sealed by middle piston O RunddichtringO 21, small piston 5 inner hole sleeve is contained in the front portion of shifting shaft 17 and is sealed by shifting shaft O RunddichtringO 20, cylindrical is nested in small-bore section in cast aluminium cylinder 2 and is sealed by small piston O RunddichtringO 19, composition power mechanism.
Gearshift tail-hood 10 arranges the locking ball guide pin bushing 7 of built-in spring 8 and steel ball 9, forms self-locking mechanism with shifting shaft 17 afterbody.
Install hexagon thin nut 23 in the front end of shifting shaft 17, shift fork 16 is installed at position therebetween, and locates with hollow screw 15, is sealed between shifting shaft 17 and cast aluminium cylinder 2 by cylinder O RunddichtringO 18.1mm is milled along radial direction at shifting shaft 17 afterbody, ensureing during for shifting gears that gearshift tail-hood inside communicates with box house, avoiding suppressing strength between shifting shaft afterbody and gearshift tail-hood, causing in casing and in tail-hood and have pressure difference, cause gearshift motionless, gearshift tail-hood 10 is provided with indicator cock 13.Being also milled with 3 semi-circular recesses with the cylindrical place that coordinates of steel ball 9 in locking ball guide pin bushing 7, the semi-circular recesses degree of depth is 3 ~ 4mm, radius of arc is R5 ~ 5.5mm, and adjacent two groove center are apart from being 2mm.Steel ball 9 can embed in any one groove, realizes gear auto-lock function, the preferred 10mm of steel ball 9 diameter.
Cylinder head 1 and gearshift tail-hood 10 arrange anterior stop screw 24 and rear portion stop screw 11 and locking nut 12 respectively, realizes the axially locating of shifting shaft to prevent the wearing and tearing between sliding gear collar and shift fork, reduce shift shock and different sound simultaneously.
Sealing adopts O RunddichtringO, and can bear the stressed of multiple directions, belong to standard piece, easily change, maintenance cost is low.
Cast aluminium cylinder is more lightweight than cast iron cylinder, and be easy to get smooth surface, little to sealing part abrasion.
The utility model three site dynamic formula gearshift working principle is as follows:
When leading to pressurized air to I pore, large piston is first pushed open to cylinder step surface by pressurized air, in promoting, piston driving small piston, shifting shaft and shift fork move to right again, and the stop screw restriction shifting shaft of gearshift tail-hood continues to move to right, and can disconnect solenoid valve and stop ventilation after completing gearshift.Now, in locking ball guide pin bushing, steel ball embeds in the Far Left semi-circular recesses on shifting shaft under the pressure of the spring, realizes gear self-locking.In whole sliding process, pore II, III is outwards vented.
Shifting shaft is from the right toward when moving left, pressurized air is led to II pore, because the cross-section area of large piston is greater than the cross-section area of small piston, pressurized air promotes piston, small piston in large piston driving and is moved to the left, thus drives shifting shaft and shift fork to move to left until large piston top is in cylinder head.Now, in locking ball guide pin bushing, steel ball embeds in the middle semi-circular recesses on shifting shaft under the action of the spring, realizes gear self-locking.
When leading to pressurized air to III pore, pressurized air promotes piston, shifting shaft and shift fork in small piston drive and moves to left, until withstand on the stop screw of cylinder head, gearshift completes.Now, in locking ball guide pin bushing, steel ball embeds in the rightmost semi-circular recesses on shifting shaft under the action of the spring, realizes gear self-locking.
Shifting shaft is by when moving from left to right, when leading to pressurized air to II pore, because large piston left side dieback is in cylinder head, pressurized air promotes piston, shifting shaft and shift fork in small piston drive and moves to right until middle piston top is on large piston, now large piston is stressed is greater than on small piston stressed, and shifting shaft cannot move.Now, in locking ball guide pin bushing, steel ball embeds in the middle semi-circular recesses on shifting shaft under the action of the spring, realizes gear self-locking.
As for pneumatic type gearshift is transformed into hydraulic type gearshift, the classification of Sealing only need be changed.
The utility model is not limited to above-mentioned mode of execution, in the ken that art those of ordinary skill possesses, can also make various change under the prerequisite not departing from the utility model aim.
Claims (5)
1. a site dynamic formula gearshift, comprise cylinder head (1), cast aluminium cylinder (2), protecgulum (6), gearshift tail-hood (10), rear case (14), shift fork (16), shifting shaft (17), wherein, protecgulum (6) and rear case (14) are buckled into casing, it is characterized in that:
A, described cast aluminium cylinder (2) are fixed on protecgulum (6), gearshift tail-hood (10) is fixed on rear case (14), shifting shaft (17) runs through protecgulum (6) and rear case (14), and its rear and front end puts in cast aluminium cylinder (2) and gearshift tail-hood (10) respectively;
B, described large piston (3) is loaded the heavy caliber section in cast aluminium cylinder (2) and is sealed by large piston O RunddichtringO (22), middle piston (4) inner hole sleeve is contained in the anterior of shifting shaft (17) and is sealed by shifting shaft O RunddichtringO (20), cylindrical is nested in large piston (3) also by middle piston O RunddichtringO (21) sealing, small piston (5) inner hole sleeve is contained in the anterior of shifting shaft (17) and is sealed by shifting shaft O RunddichtringO (20), cylindrical is nested in small-bore section in cast aluminium cylinder (2) and is sealed by small piston O RunddichtringO (19), composition power mechanism,
C, the locking ball guide pin bushing (7) of built-in spring (8) and steel ball (9) is set on described gearshift tail-hood (10), forms self-locking mechanism with shifting shaft (17) afterbody;
D, anterior stop screw (24) and rear portion stop screw (11) and locking nut (12) are set respectively in described cylinder head (1) and gearshift tail-hood (10);
E, the front end of described shifting shaft (17) install hexagon thin nut (23), therebetween position install shift fork (16), and with hollow screw (15) location, between shifting shaft (17) and cast aluminium cylinder (2) pass through cylinder O RunddichtringO (18) seal.
2. according to claim 1 some dynamic formula gearshift, it is characterized in that: mill 1mm at described shifting shaft (17) afterbody along radial direction, and being also milled with 3 semi-circular recesses with the cylindrical place that coordinates of steel ball (9) in locking ball guide pin bushing (7), steel ball (9) can embed in any one groove.
3. according to claim 2 some dynamic formula gearshift, is characterized in that: the described semi-circular recesses degree of depth is 3 ~ 4mm, radius of arc is R5 ~ 5.5mm, and adjacent two groove center distances are 2mm.
4. according to claim 1 some dynamic formula gearshift, is characterized in that: described steel ball (9) diameter is 10mm.
5. according to claim 1 some dynamic formula gearshift, is characterized in that: on described gearshift tail-hood (10), be provided with indicator cock (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850031.1U CN204403350U (en) | 2014-12-30 | 2014-12-30 | Three site dynamic formula gearshifts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850031.1U CN204403350U (en) | 2014-12-30 | 2014-12-30 | Three site dynamic formula gearshifts |
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| Publication Number | Publication Date |
|---|---|
| CN204403350U true CN204403350U (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420850031.1U Active CN204403350U (en) | 2014-12-30 | 2014-12-30 | Three site dynamic formula gearshifts |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838140A (en) * | 2017-03-27 | 2017-06-13 | 深圳市创智自动化有限公司 | A kind of new manual transmission |
| CN111532422A (en) * | 2020-04-17 | 2020-08-14 | 贵州新安航空机械有限责任公司 | Bidirectional hydraulic locking mechanism for front airplane wheel of helicopter |
-
2014
- 2014-12-30 CN CN201420850031.1U patent/CN204403350U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838140A (en) * | 2017-03-27 | 2017-06-13 | 深圳市创智自动化有限公司 | A kind of new manual transmission |
| CN111532422A (en) * | 2020-04-17 | 2020-08-14 | 贵州新安航空机械有限责任公司 | Bidirectional hydraulic locking mechanism for front airplane wheel of helicopter |
| CN111532422B (en) * | 2020-04-17 | 2023-07-28 | 贵州新安航空机械有限责任公司 | Bidirectional hydraulic locking mechanism for front wheels of helicopter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |