CN105422750A - Gear-reversing and gear-shifting mechanism for mini tiller - Google Patents
Gear-reversing and gear-shifting mechanism for mini tiller Download PDFInfo
- Publication number
- CN105422750A CN105422750A CN201510923617.5A CN201510923617A CN105422750A CN 105422750 A CN105422750 A CN 105422750A CN 201510923617 A CN201510923617 A CN 201510923617A CN 105422750 A CN105422750 A CN 105422750A
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- China
- Prior art keywords
- gear
- main shaft
- countershaft
- shaft
- master
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
- A01B71/06—Special adaptations of coupling means between power take-off and transmission shaft to the implement or machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/002—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having teeth movable out of mesh
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/083—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with radially acting and axially controlled clutching members, e.g. sliding keys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H2063/3076—Selector shaft assembly, e.g. supporting, assembly or manufacturing of selector or shift shafts; Special details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0082—Transmissions for multiple ratios characterised by the number of reverse speeds
- F16H2200/0086—Transmissions for multiple ratios characterised by the number of reverse speeds the gear ratios comprising two reverse speeds
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a gear-reversing and gear-shifting mechanism for a mini tiller. The gear-reversing and gear-shifting mechanism comprises a main shaft and an auxiliary shaft which are arranged in parallel, wherein the main shaft comprises a first main shaft and a second main shaft which are arranged on the same straight line; the first main shaft is sleeved with an input gear; the second main shaft is fixedly sleeved with a first main gear and sleeved with a main shaft duplicate gear; the auxiliary shaft comprises a first auxiliary shaft and a second auxiliary shaft; the first auxiliary shaft, the second auxiliary shaft and the main shaft are parallel to one another; the first auxiliary shaft is movably sleeved with an auxiliary shaft duplicate gear and fixedly sleeved with a first driven gear; the second auxiliary shaft is movably sleeved with a reverse gear; the sliding of the input gear is controlled by a first shifting fork mechanism, so that the change between a low input speed and a high input speed can be achieved; and a second shifting fork mechanism is arranged on the main shaft duplicate gear and controls the main shaft duplicate gear to slide, and then the reverse gear is enabled to slide, so that switching of reverse gears is achieved. The adopted structure is novel; and two reverse gears with different speeds are provided, reverse gears are increased by one time, and the actual production requirements are met.
Description
Technical field
The invention belongs to agricultural machinery technological field, be specifically related to a kind of microtilling machine and reverse gear gear changing mechanism.
Background technique
Microtilling machine with small diesel engine or petrol engine for power, the features such as have lightweight, volume is little, and structure is simple.Microtilling machine is widely used in the nonirrigated farmland, paddy field, orchard etc. on Plain, mountain area, hills.Mix corresponding facility can carry out drawing water, generate electricity, spray the operation such as medicine, spray, also can draw towed vehicle and carry out short-distance transport, microtilling machine freely can be exercised in field, user-friendly and deposit, eliminating the worry that large-scale farm machinery cannot enter mountain area field, is that vast farmers Consumer substitutes the cultivated optimal selection of ox.
The motor of tradition microtilling machine is only directly connected by flange plate with between gearbox, and power is directly delivered in gearbox by a main shaft, and gearbox is respectively integrated with walking case, has main shaft, countershaft, reverse gear shaft, three kinds of axles in gearbox.By stirring the duplex spur gear position on main shaft, reverse gear shaft, can realize fast gear, keep off and reverse gear slowly, gear is few, thus the advance of microtilling machine is relative with the speed fallen back single, especially reverse gear and only have one, there is significant limitation in actual farming, can not meet and produce actual needs.Overcome the above problems and become the task of top priority.
Summary of the invention
For solving above technical problem, the invention provides a kind of novel structure, designing microtilling machine cleverly and to reverse gear gear changing mechanism.
For achieving the above object, technical solution of the present invention is as follows:
A kind of microtilling machine reverses gear gear changing mechanism, its main points are: comprise main shaft and countershaft, described main shaft comprises setting the first main shaft (1) on the same line and the second main shaft (2), the either end of this first main shaft (1) is connected with the either end kink of described second main shaft (2), described first main shaft (1) is set with input gear (5), this input gear (5) can slide axially along described first main shaft (1), the first master gear (6) is installed with near one end of described first main shaft (1) described second main shaft (2), described second main shaft (2) is set with the second master gear (7a) and the 3rd master gear (7b), wherein the second master gear (7a) is positioned between described first master gear (6) and described 3rd master gear (7b), be fixedly connected with between described second master gear (7a) and the 3rd master gear (7b), form main shaft duplicate gear (7), this main shaft duplicate gear (7) can slide axially along described second main shaft (2), described input gear (5) is provided with the first clutch tooth (10), described first master gear (6) is provided with the second clutch tooth (11), described countershaft comprises the first countershaft (3) and the second countershaft (4), this first countershaft (3), described second countershaft (4) and described main shaft three are parallel to each other, the upper kink of first countershaft (3) has the first pinion (8a) and the second pinion (8b) wherein, be fixedly connected with between this first pinion (8a) and described second pinion (8b), form countershaft duplicate gear (8), described first countershaft (3) is installed with the first driven gear (9), the first bevel gear (12) is provided with in the either end of the first countershaft (3), reverse gear (16) is had at the upper kink of described second countershaft (4), described second pinion (8b) is engaged with described first master gear (6), when described input gear (5) slides axially along described first main shaft (1), make this input gear (5) and described first pinion (8a) engagement, or make described first clutch tooth (10) and described second clutch tooth (11) engagement, when described main shaft duplicate gear (7) slides axially along the second main shaft (2), when described main shaft duplicate gear (7) is positioned between described countershaft duplicate gear (8) and described first driven gear (9), described reverse gear (16) is slid axially along described second countershaft (4), described reverse gear (16) is engaged with described 3rd master gear (7b) and described first driven gear (9) simultaneously, described main shaft duplicate gear (7) is provided with the second shifting fork mechanism (19), this second shifting fork mechanism (19) comprises the second shift fork installation shaft (19b), in the either end of this second shift fork installation shaft (19b), the second shifting fork piece (19a) is installed, this second shifting fork piece (19a) stretches between described second master gear (7a) and the 3rd master gear (7b), promote described main shaft duplicate gear (7) to slide along the second main shaft (2), described second shift fork installation shaft (19b) is connected with reset rocking bar installation shaft (19c), this reset rocking bar installation shaft (19c) is connected with reduction torsion spring drag-line rocking bar (19d).
Adopt above structure, novel structure, design ingenious, by the slip of input gear (5), realize the high low speed friction speed transmission of the first main shaft (1) to the second main shaft (2), control main shaft duplicate gear (7) by the second shifting fork mechanism (19) to slide, then reverse gear (16) slides, complete the output of reversing gear, provide the gear that reverses gear of two kinds of different output speeds altogether, thus the gear that reverses gear that realization doubles, be applicable to various farming PRODUCTION STATUS and environment, meet and produce actual needs.
As preferably: be provided with inner chamber (13) described first main shaft (1) near one end of described second main shaft (2), described second main shaft (2) stretches into this inner chamber (13) near one end of described first main shaft (1), and the inserting end of this second main shaft (2) is connected by the first needle bearing (14) with the chamber wall of described inner chamber (13).Adopt above structure, make surface of contact become sliding friction from rolling friction, effectively reduce the rate of wear of part.
As preferably: described countershaft duplicate gear (8) is connected by the second needle bearing (14) with described first countershaft (3).Adopt above structure, make surface of contact become sliding friction from rolling friction, effectively reduce the rate of wear of part.
As preferably: described input gear (5) and described first main shaft (1) pass through spline joint.Adopt above structure, simple and reliable for structure, realize input gear (5) and slide axially along the first main shaft (1).
As preferably: be installed with reverse gear fitting seat (17) on described second countershaft (4), described reverse gear (16) kink is on this reverse gear fitting seat (17).Adopt above structure, not by direct effect when reverse gear (16) slides, add the stability of structure, extend working life.
Beneficial effect: adopt the microtilling machine of above technological scheme to reverse gear gear changing mechanism, novel structure, provides the gear that reverses gear of two kinds of friction speeds, thus realize the gear that doubles, be applicable to various farming PRODUCTION STATUS and environment, meet and produce actual needs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sectional drawing of Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
As shown in Figure 1-2, a kind of microtilling machine reverses gear gear changing mechanism, comprise main shaft and countershaft, described main shaft comprises setting the first main shaft 1 and the second main shaft 2 on the same line, the either end of this first main shaft 1 is connected with the either end kink of described second main shaft 2, namely inner chamber 13 is provided with at described first main shaft 1 near one end of described second main shaft 2, described second main shaft 2 stretches into this inner chamber 13 near one end of described first main shaft 1, the inserting end of this second main shaft 2 is connected by the first needle bearing 14 with the chamber wall of described inner chamber 13, described first main shaft 1 is set with input gear 5, described input gear 5 and described first main shaft 1 pass through spline joint, this input gear 5 can be slid axially along described first main shaft 1, the first master gear 6 is installed with near one end of described first main shaft 1 at described second main shaft 2, described second main shaft 2 is set with the second master gear 7a and the 3rd master gear 7b, wherein the second master gear 7a is between described first master gear 6 and described 3rd master gear 7b, be fixedly connected with between described second master gear 7a and the 3rd master gear 7b, form main shaft duplicate gear 7, this main shaft duplicate gear 7 can slide axially along described second main shaft 2, described input gear 5 is provided with the first clutch tooth 10, described first master gear 6 is provided with the second clutch tooth 11, described countershaft comprises the first countershaft 3 and the second countershaft 4, this first countershaft 3, described second countershaft 4 and described main shaft three are parallel to each other, on first countershaft 3, kink has the first pinion 8a and the second pinion 8b wherein, be fixedly connected with between this first pinion 8a and described second pinion 8b, form countershaft duplicate gear 8, namely described countershaft duplicate gear 8 is connected by the second needle bearing 14 with described first countershaft 3, described first countershaft 3 is installed with the first driven gear 9, the first bevel gear 12 is provided with in the either end of the first countershaft 3, on described second countershaft 4, kink has reverse gear 16, namely on described second countershaft 4, reverse gear fitting seat 17 is installed with, described reverse gear 16 kink is on this reverse gear fitting seat 17, described second pinion 8b engages with described first master gear 6, when described input gear 5 slides axially along described first main shaft 1, this input gear 5 and described first pinion 8a are engaged, or described first clutch tooth 10 and described second clutch tooth 11 are engaged, when described main shaft duplicate gear 7 slides axially along the second main shaft 2, when making described main shaft duplicate gear 7 between described countershaft duplicate gear 8 and described first driven gear 9, described reverse gear 16 is slid axially along described second countershaft 4, described reverse gear 16 is engaged with described 3rd master gear 7b and described first driven gear 9 simultaneously.
As shown in Figure 1, described input gear 5 is provided with the first shifting fork mechanism 18, this first shifting fork mechanism 18 comprises the first shift fork installation shaft 18b, in the either end of this first shift fork installation shaft 18b, the first shifting fork piece 18a is installed, described input gear 5 is provided with the first fork slot, described first shifting fork piece 18a stretches into this first fork slot, promote described input gear 5 to slide along the first main shaft 1, be connected with the first rocking arm installation shaft 18c at the other end of described first shift fork installation shaft 18b, this first rocking arm installation shaft 18c is connected with the first rocking arm 18d.
As shown in Figure 1, described main shaft duplicate gear 7 is provided with the second shifting fork mechanism 19, this second shifting fork mechanism 19 comprises the second shift fork installation shaft 19b, in the either end of this second shift fork installation shaft 19b, the second shifting fork piece 19a is installed, this second shifting fork piece 19a stretches between described second master gear 7a and the 3rd master gear 7b, promote described main shaft duplicate gear 7 to slide along the second main shaft 2, described second shift fork installation shaft 19b is connected with reset rocking bar installation shaft 19c, and this reset rocking bar installation shaft 19c is connected with reduction torsion spring drag-line rocking bar 19d.
As shown in Figure 1, described reverse gear 16 is provided with the 3rd shifting fork mechanism 20, 3rd shifting fork mechanism 20 comprises the 3rd shift fork installation shaft 20b, in the either end of the 3rd shift fork installation shaft 20b, the 3rd shifting fork piece 20a is installed, described second countershaft 4 is arranged with reverse gear reseting pressuring spring, this reverse gear reseting pressuring spring and described 3rd shifting fork piece 20a lay respectively at described reverse gear 16 both sides, described 3rd shifting fork piece 20a promotes reverse gear 16 and slides to reverse gear reseting pressuring spring direction, described reverse gear reseting pressuring spring oppositely promotes reverse gear 16 and resets, the rocking arm installation shaft 20c that reverses gear is connected with at the other end of described 3rd shift fork installation shaft 20b, this rocking arm installation shaft 20c that reverses gear is connected with the rocking arm 20d that reverses gear.
When low speed reverses gear, first shifting fork mechanism 18 control inputs gear 5 slides axially, input gear 5 and the first pinion 8a are engaged, first main shaft 1 drives input gear 5 to rotate, input gear 5 drives countershaft duplicate gear 8 to rotate, countershaft duplicate gear 8 drives the first master gear 6 to rotate, first master gear 6 drives the second main shaft 2 to rotate, second main shaft 2 drives main shaft duplicate gear 7 to rotate, second shifting fork mechanism 19 main shaft duplicate gear 7 slides axially, make main shaft duplicate gear 7 between countershaft duplicate gear 8 and the first driven gear 9, then the 3rd shifting fork mechanism 20 controls reverse gear fitting seat 17 and slides along the second countershaft 4, the reverse gear 16 of kink on reverse gear fitting seat 17 is engaged with the 3rd master gear 7b and the first driven gear 9 simultaneously, now the 3rd master gear 7b drives reverse gear 16 to rotate, reverse gear 16 drives the first driven gear 9 to rotate, first driven gear 9 drives the first countershaft 3 to rotate, first countershaft 3 drives the first bevel gear 12 to rotate.
When reversing gear at a high speed, first shifting fork mechanism 18 control inputs gear 5 slides axially, input gear 5 is separated with the first pinion 8a, first clutch tooth 10 and the second clutch tooth 11 engage, first main shaft 1 drive second main shaft 2 rotates, first master gear 6 drives countershaft duplicate gear 8 to dally, second main shaft 2 drives main shaft duplicate gear 7 to rotate, second shifting fork mechanism 19 main shaft duplicate gear 7 slides axially, make main shaft duplicate gear 7 between countershaft duplicate gear 8 and the first driven gear 9, then the 3rd shifting fork mechanism 20 controls reverse gear fitting seat 17 and slides along the second countershaft 4, the reverse gear 16 of kink on reverse gear fitting seat 17 is engaged with the 3rd master gear 7b and the first driven gear 9 simultaneously, now the 3rd master gear 7b drives reverse gear 16 to rotate, reverse gear 16 drives the first driven gear 9 to rotate, first driven gear 9 drives the first countershaft 3 to rotate, first countershaft 3 drives the first bevel gear 12 to rotate.
Finally need explanation; foregoing description is only the preferred embodiments of the present invention, those skilled in the art under enlightenment of the present invention, under the prerequisite without prejudice to present inventive concept and claim; can make like multiple types and representing, such conversion all falls within protection scope of the present invention.
Claims (5)
1. a microtilling machine reverses gear gear changing mechanism, it is characterized in that: comprise main shaft and countershaft, described main shaft comprises setting the first main shaft (1) on the same line and the second main shaft (2), the either end of this first main shaft (1) is connected with the either end kink of described second main shaft (2), described first main shaft (1) is set with input gear (5), this input gear (5) can slide axially along described first main shaft (1), the first master gear (6) is installed with near one end of described first main shaft (1) described second main shaft (2), described second main shaft (2) is set with the second master gear (7a) and the 3rd master gear (7b), wherein the second master gear (7a) is positioned between described first master gear (6) and described 3rd master gear (7b), be fixedly connected with between described second master gear (7a) and the 3rd master gear (7b), form main shaft duplicate gear (7), this main shaft duplicate gear (7) can slide axially along described second main shaft (2), described input gear (5) is provided with the first clutch tooth (10), described first master gear (6) is provided with the second clutch tooth (11),
Described countershaft comprises the first countershaft (3) and the second countershaft (4), this first countershaft (3), described second countershaft (4) and described main shaft three are parallel to each other, the upper kink of first countershaft (3) has the first pinion (8a) and the second pinion (8b) wherein, be fixedly connected with between this first pinion (8a) and described second pinion (8b), form countershaft duplicate gear (8), described first countershaft (3) is installed with the first driven gear (9), the first bevel gear (12) is provided with in the either end of the first countershaft (3), reverse gear (16) is had at the upper kink of described second countershaft (4),
Described second pinion (8b) is engaged with described first master gear (6), when described input gear (5) slides axially along described first main shaft (1), make this input gear (5) and described first pinion (8a) engagement, or make described first clutch tooth (10) and described second clutch tooth (11) engagement, when described main shaft duplicate gear (7) slides axially along the second main shaft (2), when described main shaft duplicate gear (7) is positioned between described countershaft duplicate gear (8) and described first driven gear (9), described reverse gear (16) is slid axially along described second countershaft (4), described reverse gear (16) is engaged with described 3rd master gear (7b) and described first driven gear (9) simultaneously,
Described main shaft duplicate gear (7) is provided with the second shifting fork mechanism (19), this second shifting fork mechanism (19) comprises the second shift fork installation shaft (19b), in the either end of this second shift fork installation shaft (19b), the second shifting fork piece (19a) is installed, this second shifting fork piece (19a) stretches between described second master gear (7a) and the 3rd master gear (7b), promote described main shaft duplicate gear (7) to slide along the second main shaft (2), described second shift fork installation shaft (19b) is connected with reset rocking bar installation shaft (19c), this reset rocking bar installation shaft (19c) is connected with reduction torsion spring drag-line rocking bar (19d).
2. microtilling machine according to claim 1 reverses gear gear changing mechanism, it is characterized in that: be provided with inner chamber (13) described first main shaft (1) near one end of described second main shaft (2), described second main shaft (2) stretches into this inner chamber (13) near one end of described first main shaft (1), and the inserting end of this second main shaft (2) is connected by the first needle bearing (14) with the chamber wall of described inner chamber (13).
3. microtilling machine according to claim 1 and 2 reverses gear gear changing mechanism, it is characterized in that: described countershaft duplicate gear (8) is connected by the second needle bearing (14) with described first countershaft (3).
4. microtilling machine according to claim 3 reverses gear gear changing mechanism, it is characterized in that: described input gear (5) and described first main shaft (1) pass through spline joint.
5. the microtilling machine according to claim 1 or 2 or 4 reverses gear gear changing mechanism, it is characterized in that: on described second countershaft (4), be installed with reverse gear fitting seat (17), described reverse gear (16) kink is on this reverse gear fitting seat (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923617.5A CN105422750A (en) | 2015-12-12 | 2015-12-12 | Gear-reversing and gear-shifting mechanism for mini tiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510923617.5A CN105422750A (en) | 2015-12-12 | 2015-12-12 | Gear-reversing and gear-shifting mechanism for mini tiller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105422750A true CN105422750A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510923617.5A Pending CN105422750A (en) | 2015-12-12 | 2015-12-12 | Gear-reversing and gear-shifting mechanism for mini tiller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644325A (en) * | 2018-07-16 | 2018-10-12 | 重庆卓格豪斯机械有限公司 | Gear-shifting device of mini-tiller |
-
2015
- 2015-12-12 CN CN201510923617.5A patent/CN105422750A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644325A (en) * | 2018-07-16 | 2018-10-12 | 重庆卓格豪斯机械有限公司 | Gear-shifting device of mini-tiller |
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Application publication date: 20160323 |