CN211059306U - Speed change mechanism for agricultural machinery and mini-tiller - Google Patents
Speed change mechanism for agricultural machinery and mini-tiller Download PDFInfo
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- CN211059306U CN211059306U CN201921805795.8U CN201921805795U CN211059306U CN 211059306 U CN211059306 U CN 211059306U CN 201921805795 U CN201921805795 U CN 201921805795U CN 211059306 U CN211059306 U CN 211059306U
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- 238000009313 farming Methods 0.000 description 2
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Abstract
The utility model discloses a machine is ploughed to speed change mechanism and declining for agricultural machine, including main shaft, jackshaft and output shaft be provided with main shaft duplicate gear on the main shaft and be used for the drive main shaft duplicate gear's actuating mechanism be provided with on the output shaft with two gears of main shaft duplicate gear mesh driven output gear respectively be provided with the intermediate tooth on the jackshaft, the intermediate tooth respectively with the reverse gear meshing transmission that sets up on one gear in the main shaft duplicate gear and the output shaft. Adopt the utility model discloses a speed change mechanism can lighten weight reduction volume reduction cost.
Description
The technical field is as follows:
the utility model relates to a speed change mechanism, especially be applicable to agricultural machinery for example the speed change mechanism of ploughing the machine a little.
Background art:
when agricultural machinery such as a mini-tiller, a harvester, a mower and the like is used for farming in the field, the engine is required to drive the speed change mechanism, and then the speed change mechanism drives the travelling mechanism or the farming mechanism to work.
The existing speed change mechanism of the agricultural machine is complex to operate and needs a forward operating lever and a reverse operating lever.
Chinese patent CN207269299U discloses a speed change mechanism of a mini-tiller, and specifically discloses a main shaft, an auxiliary shaft, and a driving shaft, wherein gear pairs are arranged between the main shaft and the auxiliary shaft, and between the auxiliary shaft and the driving shaft, one end of the main shaft is a power input end, one end of the driving shaft is a power output end, and the double gears on the driving shaft are driven by a shifting fork to perform power transmission.
The main shaft and the engine in the patent need to be reversed through a primary gear pair, and the speed change mechanism in the patent has the advantages of large occupied space, incompact compactness and higher cost. According to the inventors' experiments, the total weight of the three-speed transmission mechanism in this document is about 3 kg.
The utility model has the following contents:
an object of the utility model is to provide a speed change mechanism of more compact and with low costs agricultural machine to and plough the machine a little.
In order to achieve the above purpose, the utility model is designed as follows: a speed change mechanism for agricultural machinery comprises a main shaft, an intermediate shaft and an output shaft, wherein a main shaft duplicate gear and a driving mechanism for driving the main shaft duplicate gear are arranged on the main shaft, an output gear which is in meshing transmission with two gears of the main shaft duplicate gear respectively is arranged on the output shaft, an intermediate gear is arranged on the intermediate shaft, and the intermediate gear is in meshing transmission with one gear of the main shaft duplicate gear and a reverse gear arranged on the output shaft respectively. Through the design, the main shaft directly borrows force from the engine, so that the transmission is only carried out through the primary gear between the main shaft and the output shaft, and the driving mechanism is arranged on the main shaft, so that the structure of the speed change mechanism is more compact, the occupied space is smaller, unnecessary redundant parts can be removed by optimizing the space, and the weight and the cost of the speed change mechanism and the gearbox are reduced.
Further, a speed change mechanism for agricultural machinery, characterized in that: the transmission device comprises a main shaft, an intermediate shaft and an output shaft, wherein a main shaft duplicate gear and a driving mechanism for driving the main shaft duplicate gear are arranged on the main shaft, an output gear which is in meshing transmission with two gears of the main shaft duplicate gear respectively is arranged on the output shaft, intermediate teeth are arranged on the intermediate shaft, and the intermediate teeth are in meshing transmission with one gear of the main shaft duplicate gear and a reverse gear arranged on the output shaft respectively.
Furthermore, the main shaft duplicate gear is axially slidably mounted on the main shaft through a spline, a first output gear in meshing transmission with a large gear of the main shaft duplicate gear and a second output gear in meshing transmission with a small gear of the main shaft duplicate gear are fixedly arranged on the output shaft, an intermediate gear is fixedly arranged on the intermediate shaft, one gear of the main shaft duplicate gears is slidably in meshing transmission with the intermediate gear, and the intermediate gear is in meshing transmission with a reverse gear output gear fixedly arranged on the output shaft.
Furthermore, the main shaft duplicate gear is axially slidably mounted on the main shaft through a spline, and a first output gear in meshing transmission with a large gear of the main shaft duplicate gear and a second output gear in meshing transmission with a small gear of the main shaft duplicate gear are fixedly arranged on the output shaft; the main shaft is characterized in that a third intermediate gear in meshing transmission with the second output gear is fixedly arranged on the intermediate shaft, a first intermediate gear is fixedly arranged on the intermediate shaft, a large gear in the main shaft duplex gear can slide and is in meshing transmission with the first intermediate gear, the first intermediate gear drives the third intermediate gear to rotate, the third intermediate gear drives the second output gear to rotate to realize reverse gear, and the second output gear is also a reverse gear.
Furthermore, a gap bridge duplex gear is sleeved between the first output gear and the second output gear of the output shaft in an empty mode, and third-gear speed change of the speed change mechanism is achieved through the gap bridge duplex gear.
Furthermore, a second intermediate gear is fixedly arranged on the intermediate shaft, the second intermediate gear is in meshing transmission with a pinion of the intermediate shaft duplex gear, the main shaft duplex gear slides to drive a large gear of the intermediate shaft duplex gear to rotate, the pinion of the intermediate shaft duplex gear drives a second intermediate gear to rotate, a third intermediate gear on the intermediate shaft drives a second output gear to rotate, third gear speed change is achieved, and the second output gear is also a third output gear.
Furthermore, the first intermediate gear, the second intermediate gear and/or the third intermediate gear are integrally arranged with the intermediate shaft or are in splined connection with the intermediate shaft and are limited through an axial limiting mechanism.
Furthermore, the first output gear and/or the second output gear are/is integrated with the output shaft or connected with the output shaft through splines and limited through an axial limiting mechanism.
Furthermore, the first output gear and the second output gear are connected with the output shaft through splines, one ends of the first output gear and/or the second output gear, which are opposite to each other, are positioned on the output shaft through clamp springs, shaft sleeves integrated with the gears are respectively arranged at the opposite ends of the first output gear and the second output gear, and the two end faces of the double gap bridge gears are abutted to realize axial limiting of the gears on the output shaft.
Furthermore, two adjacent gears on the intermediate shaft and the output shaft are limited through clamp springs or shaft sleeves integrally arranged with the gears.
A mini-tiller comprises the speed change mechanism.
Has the advantages that:
the utility model provides a speed change mechanism compares with the speed change mechanism among the prior art, the cost is reduced, reduced the volume, reduced weight, and then make the gearbox body can do littleer.
Compare in prior art, the same speed change mechanism who keeps off the position, the utility model discloses weight has reduced more than 2kg at least. If the utility model provides a four keep off (contain neutral gear) speed change mechanism weight is only 1kg under the unchangeable condition of material of adoption, has reduced 2kg than prior art.
Description of the drawings:
fig. 1 is an isometric view of a four speed shift mechanism of embodiment 1;
fig. 2 is a front view of the four-speed shift mechanism of embodiment 1;
fig. 3 is a rear view of the four speed shift mechanism of embodiment 1;
fig. 4 is an isometric view of a five speed shift mechanism of embodiment 2;
fig. 5 is a front view of the five speed shift mechanism of embodiment 2;
fig. 6 is a rear view of the five speed shift mechanism of embodiment 2.
The specific implementation mode is as follows:
the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or replacements within the basic spirit of the embodiments still fall within the scope of the present invention claimed in the claims.
Example 1: as shown in fig. 1-3, the present embodiment provides a novel four-speed transmission mechanism for agricultural machinery, which includes a neutral gear, a forward fast gear, a forward slow gear and a reverse gear.
The four-gear speed change mechanism in the embodiment comprises a main shaft 1, an intermediate shaft 2 and an output shaft 3, wherein a main shaft duplicate gear 11 and a driving mechanism for driving the main shaft duplicate gear are arranged on the main shaft, and an output gear which is in meshing transmission with two gears of the main shaft duplicate gear respectively is arranged on the output shaft, so that a forward fast gear and a forward slow gear are realized. And the intermediate shaft is provided with intermediate teeth which are respectively in meshed transmission with one gear of the main shaft duplicate gear and a reverse gear arranged on the output shaft, so that reverse gear is realized.
Specifically, the method comprises the following steps: the main shaft duplicate gear 11 is axially slidably mounted on the main shaft 1 through a spline, and a first output gear 31 in meshing transmission with a large gear 11a of the main shaft duplicate gear and a second output gear 32 in meshing transmission with a small gear 11b of the main shaft duplicate gear 11 are fixedly arranged on the output shaft. An intermediate duplicate gear is fixedly arranged on the intermediate shaft 2, a pinion 11a in the main shaft duplicate gear 11 can be in meshing transmission with an intermediate shaft gearwheel 21 in the intermediate duplicate gear in a sliding manner, an intermediate shaft pinion 22 of the intermediate duplicate gear is in meshing transmission with a second output transmission gear 32 fixedly arranged on the output shaft, and at the moment, the second output transmission gear can be used as a reverse gear output gear.
But main shaft duplicate gear 11 installs through spline axial sliding on main shaft 1, first output gear and second output gear set up the both ends at the output shaft to the one end that first output gear and second output gear carried on the back mutually directly offsets with the bearing or carries out axial fixity through the jump ring, and the relative one end of first output gear and second output gear all is provided with the axle sleeve, the axle sleeve sets up rather than corresponding gear is integrative, offsets through the axle sleeve of two gears and realizes axial spacing.
As another embodiment in the present embodiment, the intermediate shaft gearwheel 21 and the intermediate shaft pinion 22 provided on the intermediate shaft are not provided as double teeth, but are provided integrally with the intermediate shaft, and the intermediate shaft gearwheel 21 is provided between the first output gear 31 and the second output gear 32. Of course, the intermediate shaft gearwheel 21 and the intermediate shaft pinion 22 can also be arranged separately from the intermediate shaft and axially fixed to the intermediate shaft by means of a shaft sleeve and/or a snap spring, and when the shaft sleeve is arranged, the shaft sleeve can be arranged integrally with the intermediate shaft gearwheel and/or the intermediate shaft pinion.
In addition, actuating mechanism includes shift fork 4 and declutch shift shaft 5, the shift fork card is established the both ends of main shaft duplicate gear's pinion 11a, declutch shift shaft and shift fork tip fixed connection, just declutch shift shaft, main shaft, jackshaft and output shaft parallel arrangement. And the main shaft, the intermediate shaft, and the output shaft are supported on the transmission case through bearings 10.
One end of the main shaft is directly connected to the clutch to obtain power from the engine, and one end of the output shaft is provided with an output bevel gear to output power of the transmission mechanism.
A mini-tiller comprises a speed change mechanism in the embodiment.
By adopting the speed change mechanism in the embodiment, the occupied space of the speed change mechanism can be reduced, the components of the speed change mechanism can be reduced, the weight of the speed change mechanism can be lightened, and the volume and the mass of the gearbox can be further reduced.
Example 2: as shown in fig. 4-6, the present embodiment provides a novel five-speed transmission mechanism for agricultural machinery, which includes a neutral gear, a forward fast gear, a forward intermediate gear, a forward slow gear and a reverse gear.
The five-gear speed change mechanism in the embodiment comprises a main shaft 1, an intermediate shaft 2 and an output shaft 3, wherein a main shaft duplicate gear 11 and a driving mechanism for driving the main shaft duplicate gear are arranged on the main shaft, the main shaft duplicate gear is axially and slidably mounted on the main shaft through a spline, and a first output gear 31 in meshing transmission with a large gear 11a of the main shaft duplicate gear and a second output gear 34 in meshing transmission with a small gear 11b of the main shaft duplicate gear are fixedly arranged on the output shaft. And a gap bridge duplex gear is also sleeved on the output shaft between the first output gear and the second output gear in a hollow manner, and the gap bridge duplex gear is provided with a gap bridge duplex gear small gear 32 close to the first output gear 31 and a gap bridge duplex gear large gear 33 close to the second output gear 34. The gap bridge duplex-tooth large gear 33 can be in meshed transmission with the small gear 11b on the duplex tooth of the main shaft. A first intermediate gear 25, a second intermediate gear 24 and a third intermediate gear 23 are each fixedly arranged on the intermediate shaft. The third intermediate gear is in meshed transmission with the second output gear 34, and the first intermediate gear can be in meshed transmission with the pinion with double teeth of the main shaft to realize reverse gear. And the second intermediate teeth are in meshed transmission with the small gears on the gap bridge duplex teeth to realize slow gear.
In addition, actuating mechanism includes shift fork 4 and declutch shift shaft 5, the shift fork card is established the both ends of main shaft duplicate gear's pinion 11a, declutch shift shaft and shift fork tip fixed connection, just declutch shift shaft, main shaft, jackshaft and output shaft parallel arrangement.
When the forward gear is needed, the driving mechanism drives the large gear 11a of the main shaft duplex gear to be meshed with the first output gear 31 on the output shaft for transmission, and the power is output in the positive direction through the output shaft, so that the fast gear is realized. When a slow gear needs to be advanced, the driving mechanism drives the pinion 11b of the main shaft duplex gear to be in meshing transmission with the large gear 33 of the intermediate duplex gear, the pinion 32 of the intermediate duplex gear linked with the large gear 33 of the intermediate duplex gear drives the second intermediate fixed gear 24 in meshing transmission with the pinion, the second intermediate fixed gear 24 drives the intermediate shaft to rotate and further drives the third intermediate gear 23 to rotate, the third intermediate fixed gear 23 drives the second output gear on the output shaft to rotate and positively output power from the output shaft, and at the moment, the second output gear is used as a third output gear to realize a slow gear position. When the intermediate gear needs to be advanced, the driving mechanism drives the pinion 11b of the main shaft duplex gear to be directly meshed with the second output gear 31 on the output shaft for transmission, and the power is output in the forward direction through the output shaft, so that the intermediate gear is realized. When reverse gear is needed, the driving mechanism drives the pinion 11b of the main shaft duplex gear to be in meshing transmission with the first intermediate fixed gear 25, the first intermediate fixed gear 25 drives the intermediate shaft to rotate so as to drive the third intermediate fixed gear 23 to rotate, the third intermediate fixed gear 23 drives the second output gear 34 on the output shaft to rotate, and power is reversely output by the output shaft, so that the reverse gear is realized. That is, the second output gear 34 in the present embodiment can be used as an output gear of a slow gear or an output gear of an intermediate gear, or can be used as an output gear of a reverse gear, and one gear can serve three purposes.
In this embodiment, the main shaft duplex teeth 11 are connected with the main shaft spline and can axially slide, the intermediate bridge duplex teeth are arranged between the first output gear and the second output gear, the intermediate bridge duplex teeth are sleeved on the output shaft in an empty mode, the first output gear and the second output gear are fixedly connected with the output gear through the spline, and axial limiting is performed through the snap spring and the shaft sleeve. The fixed gear in the middle of the third sets up with the jackshaft is integrative, the fixed gear in the middle of the second is close to the fixed gear in the middle of the third one end with the axle card location or with the shaft shoulder counterbalance, the other end with through the boss with the fixed gear in the middle of the first realization axial positioning, the other terminal surface of fixed gear in the middle of the first is provided with integrative axle sleeve and offsets with another independent axle sleeve through the axle sleeve and realizes axial positioning.
In addition, actuating mechanism includes shift fork 4 and declutch shift shaft 5, the shift fork card is established the both ends of main shaft duplicate gear's pinion 11a, declutch shift shaft and shift fork tip fixed connection, just declutch shift shaft, main shaft, jackshaft and output shaft parallel arrangement. And the main shaft, the intermediate shaft, and the output shaft are supported on the transmission case through bearings 10.
One end of the main shaft is directly connected to the clutch to obtain power from the engine, and one end of the output shaft is provided with an output bevel gear to output power of the transmission mechanism.
A mini-tiller comprises a speed change mechanism in the embodiment.
By adopting the speed change mechanism in the embodiment, the occupied space of the speed change mechanism can be reduced, the components of the speed change mechanism can be reduced, the weight of the speed change mechanism can be lightened, and the volume and the mass of the gearbox can be further reduced.
Claims (10)
1. A speed change mechanism for an agricultural machine, characterized by: the transmission device comprises a main shaft, an intermediate shaft and an output shaft, wherein a main shaft duplicate gear and a driving mechanism for driving the main shaft duplicate gear are arranged on the main shaft, an output gear which is in meshing transmission with two gears of the main shaft duplicate gear respectively is arranged on the output shaft, intermediate teeth are arranged on the intermediate shaft, and the intermediate teeth are in meshing transmission with one gear of the main shaft duplicate gear and a reverse gear arranged on the output shaft respectively.
2. The transmission mechanism for agricultural machines of claim 1, wherein: the main shaft duplicate gear is axially and slidably mounted on the main shaft through a spline, a first output gear in meshing transmission with a large gear of the main shaft duplicate gear and a second output gear in meshing transmission with a small gear of the main shaft duplicate gear are fixedly arranged on the output shaft, an intermediate gear is fixedly arranged on the intermediate shaft, one gear of the main shaft duplicate gear can be in meshing transmission with the intermediate gear in a sliding manner, and the intermediate gear is in meshing transmission with a reverse gear output gear fixedly arranged on the output shaft.
3. The transmission mechanism for agricultural machines of claim 1, wherein: the main shaft duplicate gear is axially and slidably arranged on the main shaft through a spline, and a first output gear in meshing transmission with a large gear of the main shaft duplicate gear and a second output gear in meshing transmission with a small gear of the main shaft duplicate gear are fixedly arranged on the output shaft; the main shaft is characterized in that a third intermediate gear in meshing transmission with the second output gear is fixedly arranged on the intermediate shaft, a first intermediate gear is fixedly arranged on the intermediate shaft, a large gear in the main shaft duplex gear can slide and is in meshing transmission with the first intermediate gear, the first intermediate gear drives the third intermediate gear to rotate, the third intermediate gear drives the second output gear to rotate to realize reverse gear, and the second output gear is also a reverse gear.
4. An agricultural machine speed change mechanism as defined in claim 3, wherein: and a gap bridge duplex gear is sleeved between the first output gear and the second output gear of the output shaft in an empty way, and the third gear speed change of the speed change mechanism is realized through the gap bridge duplex gear.
5. An agricultural machine speed change mechanism as defined in claim 4, wherein: the intermediate shaft is fixedly provided with a second intermediate gear, the second intermediate gear is in meshing transmission with a pinion of the intermediate shaft duplex teeth, the main shaft duplex teeth slide to drive a large gear of the intermediate shaft duplex teeth to rotate, the pinion of the intermediate shaft duplex teeth drives the second intermediate gear to rotate, a third intermediate gear on the intermediate shaft drives a second output gear to rotate, third-gear speed change is achieved, and the second output gear is also a third output gear.
6. An agricultural machine speed change mechanism as defined in claim 5, wherein: the first intermediate gear, the second intermediate gear and/or the third intermediate gear are/is integrated with the intermediate shaft or are in splined connection with the intermediate shaft and are limited through an axial limiting mechanism.
7. An agricultural machine speed change mechanism as defined in claim 6, wherein: the first output gear and/or the second output gear are/is integrated with the output shaft or connected with the output shaft through splines and limited through an axial limiting mechanism.
8. An agricultural machine speed change mechanism as defined in claim 7, wherein: the first output gear and the second output gear are connected with the output shaft through splines, one ends of the first output gear and/or the second output gear, which are opposite to each other, are positioned on the output shaft through the clamp springs, shaft sleeves integrated with the gears are respectively arranged at one ends of the first output gear and the second output gear, and the two end faces of the two shaft sleeves and the two end faces of the gap bridge duplex teeth are abutted to realize axial limiting of the gears on the output shaft.
9. The transmission mechanism of an agricultural machine according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein: two adjacent gears on the intermediate shaft and the output shaft are limited through clamp springs or shaft sleeves integrally arranged with the gears.
10. A micro-cultivator is characterized in that: comprising a gear change mechanism according to any of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921805795.8U CN211059306U (en) | 2019-10-25 | 2019-10-25 | Speed change mechanism for agricultural machinery and mini-tiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921805795.8U CN211059306U (en) | 2019-10-25 | 2019-10-25 | Speed change mechanism for agricultural machinery and mini-tiller |
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| Publication Number | Publication Date |
|---|---|
| CN211059306U true CN211059306U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921805795.8U Active CN211059306U (en) | 2019-10-25 | 2019-10-25 | Speed change mechanism for agricultural machinery and mini-tiller |
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| CN (1) | CN211059306U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079827A (en) * | 2021-03-03 | 2021-07-09 | 重庆家户农机有限公司 | Reversing control mechanism of small harvester |
| CN117052843A (en) * | 2023-08-30 | 2023-11-14 | 威马农机股份有限公司 | Four-stage gear transmission, gear box and agricultural vehicle |
-
2019
- 2019-10-25 CN CN201921805795.8U patent/CN211059306U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079827A (en) * | 2021-03-03 | 2021-07-09 | 重庆家户农机有限公司 | Reversing control mechanism of small harvester |
| CN113079827B (en) * | 2021-03-03 | 2022-07-01 | 重庆家户农机有限公司 | Reversing control mechanism of small harvester |
| CN117052843A (en) * | 2023-08-30 | 2023-11-14 | 威马农机股份有限公司 | Four-stage gear transmission, gear box and agricultural vehicle |
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