CN203770550U - Synchronous reversing tractor transmission case with crawling gear - Google Patents
Synchronous reversing tractor transmission case with crawling gear Download PDFInfo
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- CN203770550U CN203770550U CN201420132929.5U CN201420132929U CN203770550U CN 203770550 U CN203770550 U CN 203770550U CN 201420132929 U CN201420132929 U CN 201420132929U CN 203770550 U CN203770550 U CN 203770550U
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Abstract
Disclosed is a synchronous reversing tractor transmission case with a crawling gear. The synchronous reversing tractor transmission case comprises a synchronizer reversing device, a main variable speed device, an auxiliary variable speed device and a crawling gear device. The synchronizer reversing device, the main variable speed device, the auxiliary variable speed device and the crawling gear device are sequentially arrayed. One end of the synchronizer reversing device is connected with an engine, and one end of the crawling gear device is connected with a small bevel gear shaft. The synchronizer reversing device and the main variable speed device adopt a double-friction cone synchronizer. By the combination of the synchronizer reversing device, the main variable speed device, the auxiliary variable speed device and the crawling gear device, 32 forward gears and 32 backward gears can be realized, and operation requirements can be well met with more backward gears; the synchronizer reversing device is arranged at the front end of the main variable speed device, reversing gear can be realized by adopting the double-friction cone synchronizer structure, parking to engage the gear at the low speed is not required, gear shifting impact and gear shifting force are small, less time is spent on gear shifting, and operation efficiency is high.
Description
Technical field
The utility model belongs to tractor field, relates to a kind of gear box of tractor, relates in particular to a kind of synchronous communicating band creeper gear gear box of tractor.
Background technique
Along with the quick raising of Tendency of Agricultural Machinery in China level, user to the requirement of tractor be no longer only confined to plough, the traditional work such as rake, more wish to complete the supplement production work in agricultural production, as back and forth moved producer goods etc. in short distance.Meanwhile, tractor has also been had to further requirement lower than the ultralow speed of 0.3km/h and handling comfort.At present, domestic tractor is general adopts traditional band gearbox that reverses gear, and the gear number that falls back is generally 2～4, and minimum speed is greater than 1.5km/h, and because its gear number is less, velocity range is narrower, is difficult to adapt to job requirements rapidly and efficiently.In addition, during tractor gearshift, impact force and required steering force are larger, often to pilot control, bring discomfort.Therefore the tractor that, configures traditional gearbox can not be met consumers' demand.Therefore, be necessary that exploitation has a plurality of gears that fall back, ultralow speed, commutates and put into gear, handle light gear box of tractor device.
Model utility content
The purpose of this utility model is to provide that a kind of gear number that falls back is many, velocity range is wide, handle comfortable light gear box of tractor.
The technical solution of the utility model is: synchronous communicating band creeper gear gear box of tractor, comprising: synchronizer reversing arrangement, main transformer speed variator, secondary speed-changing device and creeper gear device; Synchronizer reversing arrangement, main transformer speed variator, secondary speed-changing device and creeper gear device are arranged in order, and wherein synchronizer reversing arrangement one end is connected with motor, and creeper gear device one end is connected with small coning gear shaft; Synchronizer reversing arrangement, main transformer speed variator adopt double friction cone synchronizer.
Main clutch axle, commutation driven gear shaft, reverse idler gear axle are installed in synchronous communicating device; Main shift driving shaft and main transformer speed driven shaft are installed in main transformer speed variator; Secondary shift driving shaft and secondary speed change driven shaft are installed in secondary speed-changing device; Wherein the axle center of main clutch axle, main shift driving shaft, secondary shift driving shaft is on same straight line, and the axle center of commutation driven gear shaft, main transformer speed driven shaft, secondary speed change driven shaft and small coning gear shaft is on same straight line, and two groups of axle systems are parallel to each other; Power output front axle passes from the inside of main clutch axle, main shift driving shaft and secondary shift driving shaft.
In synchronous communicating device, on main clutch axle, empty set is provided with commutation driving gear, be installed with commutation synchronizer component, commutation one-level driven gear and commutation secondary driving gear are an integral body with commutation driven gear shaft, and reverse idler gear and reverse idler gear axle are an integral body; Reverse idler gear is intermeshing with commutation driving gear, commutation one-level driven gear respectively, and commutation secondary driving gear is intermeshing with commutation secondary driven gear, and commutation secondary driven gear and main shift driving shaft are an integral body; The engaging sleeve of commutation synchronizer component can horizontally slip vertically and engage with the connection teeth of two side gears respectively.
In main transformer speed variator, on main shift driving shaft, empty set is provided with I gear driving gear, II gear driving gear, III gear driving gear and IV gear driving gear, is installed with I/II gear synchronizer component and III/IV gear synchronizer component; On main transformer speed driven shaft, be fixedly installed in I gear driven gear, II gear driven gear, III gear driven gear and IV gear driven gear; I gear driving gear, II gear driving gear, III gear driving gear, IV gear driving gear are intermeshing with I gear driven gear, II gear driven gear, III gear driven gear, IV gear driven gear respectively; I/II gear synchronizer component and the III/engaging sleeve of IV gear synchronizer component can horizontally slip vertically and engage with the connection teeth of adjacent two side gears respectively.
In secondary speed-changing device, on secondary shift driving shaft, be installed with L gear driving gear and M gear driving gear, often meshing driven gear and LL gear driving gear and secondary shift driving shaft is an integral body; On secondary speed change driven shaft, be installed with H/LL engaging sleeve, L/M engaging sleeve, empty set is provided with LL gear driven gear, L gear driven gear and M gear driven gear; Normal engagement driven gear, LL gear driving gear, L gear driving gear, M gear driving gear are intermeshing with normal engagement driving gear, LL gear driven gear, L gear driven gear, M gear driven gear respectively, and often meshing driving gear is an integral body with the fast driven shaft of main transformer; H/LL engaging sleeve and L/M engaging sleeve can horizontally slip vertically and be combined with the connection teeth of adjacent two side gears respectively.
Creeper gear device is comprised of the planetary gears of two series connection, shared ring gear is fixed on casing, primary planet carrier and secondary planet frame are installed in ring gear, and the axle center of ring gear, primary planet carrier and secondary planet frame and secondary speed change driven shaft point-blank; One-level sun gear is fixedly installed in secondary speed change driven shaft rear end, on primary planet carrier and secondary planet frame, be separately installed with three planet wheels and, secondary solar gear and primary planet carrier are welded as a whole, and are welded with internal spline hub on secondary planet frame; Three planet wheels on primary planet carrier are intermeshing respectively at one-level sun gear and ring gear, and three planet wheels on secondary planet frame are intermeshing with secondary level sun gear and ring gear respectively; Creeper gear engaging sleeve is fixedly installed on small coning gear shaft, can horizontally slip vertically, engages respectively with secondary speed change driven shaft, internal spline hub.
The utility model can reach following good effect after adopting technique scheme: synchronous communicating band creeper gear gear box of tractor adopts above-mentioned arrangement, compact structure, can be by tractor engine power to tractor rear axle, propons and pto＝power take-off transmission.By the combination of synchronizer reversing arrangement, main transformer speed variator, secondary speed-changing device, creeper gear device, can realize 32 forward gears and 32 gears that fall back, the gear number that falls back is many, and minimum speed is less than 0.25km/h, meets well operation needs; Synchronizer reversing arrangement is arranged in main transformer speed front end, and adopts double friction cone synchronizer structure realization commutation to put into gear, and when low speed, needn't stop and put into gear, and gearshift impact and gear shifting force are little, and the gearshift time is few, and operating efficiency is high; Main transformer speed variator adopts the gearshift of double friction cone synchronizer, the gearshift of can not stopping, and gearshift impact and gear shifting force are little, and operating efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model synchronous communicating band creeper gear gear box of tractor.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.As shown in Figure 1, synchronous communicating band creeper gear gear box of tractor, total synchronizer reversing arrangement T1, main transformer speed variator T2, secondary speed-changing device T3 and creeper gear device T4 totally four parts form.Wherein synchronous communicating device T1 one end is connected with motor A, creeper gear device T4 is connected with small coning gear shaft S5, power divides two-way transmission herein, and a road leads to tractor rear axle D through small coning gear shaft S5, and the 4 wheel driven driving gear 18 that install on small coning gear shaft on another road leads to farm tractor front axle C.
Main clutch axle S1, commutation driven gear shaft S9, reverse idler gear axle S8 are installed in synchronous communicating device T1; Main shift driving shaft S3 and main transformer speed driven shaft S7 are installed in main transformer speed variator T2; Secondary shift driving shaft S4 and secondary speed change driven shaft S6 are installed in secondary speed-changing device T3.Wherein the axle center of main clutch axle S1, main shift driving shaft S3, secondary shift driving shaft S4 is on same straight line, the axle center of commutation driven gear shaft S9, main transformer speed driven shaft S7, secondary speed change driven shaft S6 and small coning gear shaft S5 is on same straight line, and two groups of axle systems are parallel to each other; Power output front axle S2 passes from the inside of main clutch axle S1, main shift driving shaft S3 and secondary shift driving shaft S4.
In synchronous communicating device T1, the upper empty set of main clutch axle S1 is provided with commutation driving gear 1, be installed with commutation synchronizer component 2, commutation one-level driven gear 36 and commutation secondary driving gear 34 are an integral body with commutation driven gear shaft S9, and reverse idler gear 35 is an integral body with reverse idler gear axle S8; Reverse idler gear 35 is intermeshing with commutation driving gear 1, commutation one-level driven gear 36 respectively, and commutation secondary driving gear 34 is intermeshing with commutation secondary driven gear 3, and commutation secondary driven gear 3 is an integral body with main shift driving shaft S3; The engaging sleeve of commutation synchronizer component 2 can horizontally slip vertically and engage with the connection teeth of two side gears respectively.
In main transformer speed variator T2, the upper empty set of main shift driving shaft S3 is provided with I gear driving gear 9, II gear driving gear 7, III gear driving gear 6 and IV gear driving gear 4, is installed with I/II gear synchronizer component 8 and III/IV gear synchronizer component 5; On main transformer speed driven shaft S7, be fixedly installed in I gear driven gear 30, II gear driven gear 31, III gear driven gear 32 and IV gear driven gear 33; I gear driving gear 9, II gear driving gear 7, III gear driving gear 6, IV gear driving gear 4 are intermeshing with I gear driven gear 30, II gear driven gear 31, III gear driven gear 32, IV gear driven gear 33 respectively; I/II gear synchronizer component 8 and the III/engaging sleeve of IV gear synchronizer component 5 can horizontally slip vertically and engage with the connection teeth of adjacent two side gears respectively.
In secondary speed-changing device T3, on secondary shift driving shaft S4, be installed with L gear driving gear 12 and M gear driving gear 13, often meshing driven gear 10 and LL gear driving gear 11 and secondary shift driving shaft S4 is an integral body; On secondary speed change driven shaft S6, be installed with H/LL engaging sleeve 28, L/M engaging sleeve 25, empty set is provided with LL gear driven gear 27, L gear driven gear 26 and M gear driven gear 24; Normal engagement driven gear 10, LL gear driving gear 11, L gear driving gear 12, M gear driving gear 13 are intermeshing with normal engagement driving gear 29, LL gear driven gear 27, L gear driven gear 26, M gear driven gear 24 respectively, and often meshing driving gear 29 is an integral body with main transformer speed driven shaft S7; H/LL engaging sleeve 28 and L/M engaging sleeve 25 can horizontally slip vertically and be combined with the connection teeth of adjacent two side gears respectively.
Creeper gear device T4 is comprised of the planetary gears of two series connection, shared ring gear 14 is fixed on casing, primary planet carrier 22 and secondary planet frame 20 are installed in ring gear 14, and the axle center of ring gear 14, primary planet carrier 22 and secondary planet frame 20 and secondary speed change driven shaft S7 point-blank; One-level sun gear 23 is fixedly installed in secondary speed change driven shaft S7 rear end, on primary planet carrier 22 and secondary planet frame 20, be separately installed with three planet wheels 15 and 16, secondary solar gear 21 is welded as a whole with primary planet carrier 22, is welded with internal spline hub 19 on secondary planet frame 20; Three planet wheels 15 on primary planet carrier 22 are intermeshing respectively at one-level sun gear 23 and ring gear 14, and three planet wheels 16 on secondary planet frame 20 are intermeshing with secondary level sun gear 21 and ring gear 14 respectively; It is upper that creeper gear engaging sleeve 17 is fixedly installed in small coning gear shaft S5, can horizontally slip vertically, engages respectively with secondary speed change driven shaft S7, internal spline hub 19.
In synchronous communicating band creeper gear gear box of tractor, engine power divides two-way transmission: the first via is exported front axle S2 from motor A by power and is passed to power take-off B, drives pto＝power take-off; The second road is passed to synchronizer reversing arrangement T1 from motor A by main clutch axle S1, according to the state of the commutation synchronizer component 2 on main clutch axle S1 in synchronizer reversing arrangement T1, can realize two gears, and the bang path of each gear is as follows:
Forward gear: commutation synchronizer component 2 engaging sleeves slide to the right, engages with the connection teeth of commutation secondary driven gear 3, and power is by main clutch axle S1 → commutation synchronizer component 2 → commutation secondary driven gear 3.
Gear falls back: commutation synchronizer component 2 engaging sleeves slide left, engage with the connection teeth of commutation master gear 1, power is by main clutch axle S1 → commutation synchronizer component 2 → commutation driving gear 1 → reverse idler gear 35 → commutation one-level driven gear 36 → commutation secondary driving gear 34 → commutation secondary driven gear 3.
Power is passed to main shift driving shaft S3 by the secondary driven gear 3 that commutates, be passed in main transformer speed variator T2, according to the state of the I in main transformer speed variator T2/II gear synchronizer component 8 and III/IV gear synchronizer component 5, can realize four gears, each gear bang path is as follows:
I gear: I/II gear synchronizer component 8 slides to the right, engages with the connection teeth of I gear driving gear 9, and III/IV gear synchronizer component 5 does not engage with the connection teeth of adjacent gear.Power is by the secondary driven gear 3 that commutates → main shift driving shaft S3 → I/II synchronizer component 8 → I gear driving gear 9 → I gear driven gear 30 → main transformer speed driven shaft S7.
II gear: I/II gear synchronizer component 8 slides left, engages with the connection teeth of II gear driving gear 7, and III/IV gear synchronizer component 5 does not engage with the connection teeth of adjacent gear.Power is by the secondary driven gear 3 that commutates → main shift driving shaft S3 → I/II synchronizer component 8 → II gear driving gear 7 → II gear driven gear 31 → main transformer speed driven shaft S7.
III gear: III/IV gear synchronizer component 5 slides to the right, engages with the connection teeth of III gear driving gear 6, and I/II gear synchronizer component 8 does not engage with the connection teeth of adjacent gear.Power is by the secondary driven gear 3 that commutates → main shift driving shaft S3 → III/IV gear synchronizer component 5 → III gear driving gear 6 → III gear driven gear 32 → main transformer speed driven shaft S7.
IV gear: III/IV gear synchronizer component 5 slides left, engages with the connection teeth of IV gear driving gear 4, and I/II gear synchronizer component 8 does not engage with the connection teeth of adjacent gear.Power is by the secondary driven gear 3 that commutates → main shift driving shaft S3 → III/IV gear synchronizer component 5 → IV gear driving gear 4 → IV gear driven gear 33 → main transformer speed driven shaft S7.
Power, by main transformer speed driven shaft S7, often meshes driving gear 29 and is passed in secondary speed-changing device T3.According to the state of H/LL engaging sleeve 28 in secondary speed-changing device T3 and L/M engaging sleeve 25, can realize four gears, each gear bang path is as follows:
LL gear: H/LL engaging sleeve 28 slides to the right, engages with the connection teeth of LL gear driven gear 27, and L/M engaging sleeve 25 does not engage with the connection teeth of adjacent gear.Power is by main transformer speed driven shaft S7 → often mesh driving gear 29 → often mesh driven gear 10 → secondary shift driving shaft S4 → LL gear driving gear 11 → LL gear driven gear 27 → H/LL engaging sleeve 28 → secondary speed change driven shaft S6.
L gear: L/M engaging sleeve 25 slides left, engages with the connection teeth of L gear driven gear 26, and H/LL engaging sleeve 28 does not engage with the connection teeth of adjacent gear.Power is by main transformer speed driven shaft S7 → often mesh driving gear 29 → often mesh driven gear 10 → secondary shift driving shaft S4 → L gear driving gear 12 → L gear driven gear 26 → L/M engaging sleeve 25 → secondary speed change driven shaft S6.
M shelves: L/M engaging sleeve 25 slides to the right, engage with the connection teeth of M gear driven gear 24, and H/LL engaging sleeve 28 does not engage with the connection teeth of adjacent gear.Power is by main transformer speed driven shaft S7 → often mesh driving gear 29 → often mesh driven gear 10 → secondary shift driving shaft S4 → M gear driving gear 13 → M gear driven gear 24 → L/M engaging sleeve 25 → secondary speed change driven shaft S6.
H gear: H/LL engaging sleeve 28 slides left, engages with the connection teeth of normal engagement driving gear 29, and L/M engaging sleeve 25 does not engage with the connection teeth of adjacent gear.Power is by main transformer speed driven shaft S7 → often mesh driving gear 29 → H/LL engaging sleeve 28 → secondary speed change driven shaft S6.
Power is passed in creeper gear device T4 by secondary speed change driven shaft S6, according to the state of creeper gear engaging sleeve 17 in creeper gear device T4, can realize two gears, and each gear power transfer path is as follows:
Directly keep off: creeper gear engaging sleeve slides left, engages with secondary speed change driven shaft S6.Power is by secondary speed change driven shaft S6 → creeper gear engaging sleeve 17 → small coning gear shaft S5.
Creeper gear: creeper gear engaging sleeve slides to the right, engages with internal spline hub 19.Power is by secondary speed change driven shaft S6 → one-level sun gear 23 → planet wheel 15 → primary planet carrier 22 → secondary solar gear 21 → planet wheel 16 → secondary planet frame 20 → internal spline hub 19 → creeper gear engaging sleeve 17 → small coning gear shaft S5.
When realizing each gear, transmission of power is during to small coning gear shaft S5, and wherein a part of power is passed to propons C through 4 wheel driven driving gear 18.Power is by small coning gear shaft S5 → 4 wheel driven driving gear 18 → propons C.
This gear box of tractor, through synchronizer reversing arrangement T1, main transformer speed variator T2, secondary speed-changing device T3 and creeper gear device T4 combination, can be realized engine power is transmitted to back axle D, propons C, and can realize 32 advance gear and 32 gears that fall back.
Claims (6)
1. synchronous communicating band creeper gear gear box of tractor, comprising: synchronizer reversing arrangement (T1), main transformer speed variator (T2), secondary speed-changing device (T3) and creeper gear device (T4); It is characterized in that: synchronizer reversing arrangement (T1), main transformer speed variator (T2), secondary speed-changing device (T3) and creeper gear device (T4) are arranged in order, wherein synchronizer reversing arrangement (T1) one end is connected with motor (A), and creeper gear device (T4) one end is connected with small coning gear shaft (S5); Synchronizer reversing arrangement (T1), main transformer speed variator (T2) adopt double friction cone synchronizer.
2. synchronous communicating band creeper gear gear box of tractor according to claim 1, is characterized in that: main clutch axle (S1), commutation driven gear shaft (S9), reverse idler gear axle (S8) are installed in synchronous communicating device (T1); Main shift driving shaft (S3) and main transformer speed driven shaft (S7) are installed in main transformer speed variator (T2); Secondary shift driving shaft (S4) and secondary speed change driven shaft (S6) are installed in secondary speed-changing device (T3); Wherein the axle center of main clutch axle (S1), main shift driving shaft (S3), secondary shift driving shaft (S4) is on same straight line, the axle center of commutation driven gear shaft (S9), main transformer speed driven shaft (S7), secondary speed change driven shaft (S6) and small coning gear shaft (S5) is on same straight line, and two groups of axle systems are parallel to each other; Power output front axle (S2) passes from the inside of main clutch axle (S1), main shift driving shaft (S3) and secondary shift driving shaft (S4).
3. synchronous communicating band creeper gear gear box of tractor according to claim 1, it is characterized in that: in synchronous communicating device (T1), the upper empty set of main clutch axle (S1) is provided with commutation driving gear (1), be installed with commutation synchronizer component (2), commutation one-level driven gear (36) and commutation secondary driving gear (34) are an integral body with commutation driven gear shaft (S9), and reverse idler gear (35) is an integral body with reverse idler gear axle (S8); Reverse idler gear (35) respectively with commutation driving gear (1), commutation one-level driven gear (36) intermeshing, commutation secondary driving gear (34) is intermeshing with commutation secondary driven gear (3), and commutation secondary driven gear (3) is an integral body with main shift driving shaft (S); The engaging sleeve of commutation synchronizer component (2) can horizontally slip vertically and engage with the connection teeth of two side gears respectively.
4. synchronous communicating band creeper gear gear box of tractor according to claim 1, it is characterized in that: in main transformer speed variator (T2), the upper empty set of main shift driving shaft (S3) is provided with I gear driving gear (9), II gear driving gear (7), III gear driving gear (6) and IV gear driving gear (4), is installed with I/II gear synchronizer component (8) and III/IV gear synchronizer component (5); On main transformer speed driven shaft (S7), be fixedly installed in I gear driven gear (30), II gear driven gear (31), III gear driven gear (32) and IV gear driven gear (33); I gear driving gear (9), II gear driving gear (7), III gear driving gear (6), IV gear driving gear (4) are intermeshing with I gear driven gear (30), II gear driven gear (31), III gear driven gear (32), IV gear driven gear (33) respectively; I/II gear synchronizer component (8) and the III/engaging sleeve of IV gear synchronizer component (5) can horizontally slip vertically and engage with the connection teeth of adjacent two side gears respectively.
5. synchronous communicating band creeper gear gear box of tractor according to claim 1, it is characterized in that: in secondary speed-changing device (T3), on secondary shift driving shaft (S4), be installed with L gear driving gear (12) and M gear driving gear (13), often meshing driven tooth (10) and LL gear driving gear (11) and secondary shift driving shaft (S4) is an integral body; On secondary speed change driven shaft (S6), be installed with H/LL engagement (28), L/M engaging sleeve (25), empty set is provided with LL gear driven gear (27), L gear driven gear (26) and M gear driven tooth (24); Normal engagement driven gear (10), LL gear driving gear (11), L gear driving gear (12), M gear driving gear (13) are intermeshing with normal engagement driving tooth (29), LL gear driven gear (27), L gear driven tooth (26), M gear driven gear (24) respectively, and often meshing driving gear (29) is an integral body with main transformer speed driven shaft (S7); H/LL engaging sleeve (28) and L/M engaging sleeve (25) can horizontally slip vertically and be combined with the connection teeth of adjacent two side gears respectively.
6. synchronous communicating band creeper gear gear box of tractor according to claim 1, it is characterized in that: creeper gear device (T4) is comprised of the planetary gears of two series connection, shared ring gear (14) is fixed on casing, primary planet carrier (22) and secondary planet frame (20) are installed in ring gear (14), and the axle center of ring gear (14), primary planet carrier (22) and secondary planet frame (20) and secondary speed change driven shaft (S7) point-blank; One-level sun gear (23) is fixedly installed in secondary speed change driven shaft (S7) rear end, on primary planet carrier (22) and secondary planet frame (20), be separately installed with three planet wheels (15) and (16), the secondary sun (21) is welded as a whole with primary planet carrier (22), is welded with internal spline hub (19) on secondary planet frame (20); Three planet wheels (15) on primary planet carrier (22) are intermeshing respectively at one-level sun gear (23) and ring gear (14), and three planet wheels (16) on secondary planet frame (20) are intermeshing with secondary level sun gear (21) and ring gear (14) respectively; It is upper that creeper gear engaging sleeve (17) is fixedly installed in small coning gear shaft (S5), can horizontally slip vertically, engages respectively with secondary speed change driven shaft (S7), internal spline hub (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132929.5U CN203770550U (en) | 2014-03-24 | 2014-03-24 | Synchronous reversing tractor transmission case with crawling gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132929.5U CN203770550U (en) | 2014-03-24 | 2014-03-24 | Synchronous reversing tractor transmission case with crawling gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770550U true CN203770550U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420132929.5U Expired - Fee Related CN203770550U (en) | 2014-03-24 | 2014-03-24 | Synchronous reversing tractor transmission case with crawling gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925346A (en) * | 2014-03-24 | 2014-07-16 | 第一拖拉机股份有限公司 | Synchronous reversing belt crawling-gear gearbox of tractor |
| CN105114605A (en) * | 2015-09-09 | 2015-12-02 | 屠庆珏 | Gear multiplier speed change mechanism |
-
2014
- 2014-03-24 CN CN201420132929.5U patent/CN203770550U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925346A (en) * | 2014-03-24 | 2014-07-16 | 第一拖拉机股份有限公司 | Synchronous reversing belt crawling-gear gearbox of tractor |
| CN103925346B (en) * | 2014-03-24 | 2016-08-17 | 第一拖拉机股份有限公司 | Synchronous communicating band creeper gear gear box of tractor |
| CN105114605A (en) * | 2015-09-09 | 2015-12-02 | 屠庆珏 | Gear multiplier speed change mechanism |
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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: 20140813 Termination date: 20180324 |
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| CF01 | Termination of patent right due to non-payment of annual fee |