阅读说明：本技术 用于机械化农具的变速箱和包括此类变速箱的机械化农具 (Gearbox for mechanization farm implements and the mechanization farm implements including such gearbox ) 是由 皮埃尔·乐西安 尼古拉斯·杰布 皮特·韦恩 于 2018-05-15 设计创作，主要内容包括：本发明涉及一种用于机械化农具的变速箱(608),其使机动构件与该农具的驱动元件互连,上述变速箱(608)包括：输入轴(21),其设计成由所述机动构件以旋转方式驱动；输出轴(23),其设计成驱动所述农具的所述驱动元件；小齿轮,称为滑动小齿轮(11),其安装成便于在所述输入轴(21)上移动,且设计成采用至少一种前进档位置,以及采用至少一种倒档位置；移动支架(4),其延伸到所述变速箱(608)内且设计成与所述滑动小齿轮(11)协作。根据本发明,上述变速箱(608)进一步包括双头杆(5),用以控制所述支架(4)的移动,采用部分地延伸到所述变速箱(608)的内部中的棒的形式,所述双头杆(5)的第一末端设计成连接到控制电缆(C)使得施加在所述控制电缆(C)上的负载引起传动比的改变。(The gearbox (608) that the present invention relates to a kind of for mechanization farm implements, it interconnects the driving element of motor-driven component and the farm implements, above-mentioned gearbox (608) includes: input shaft (21), is designed to be driven in a rotative pattern by the motor-driven component；Output shaft (23) is designed to drive the driving element of the farm implements；Pinion gear, referred to as sliding pinion (11) are mounted for moving on the input shaft (21), and are designed to using at least one forward position, and using at least one reverse gear position；Mobile bracket (4) extend in the gearbox (608) and are designed to cooperate with the sliding pinion (11).According to the present invention, above-mentioned gearbox (608) further comprises double end bar (5), to control the movement of the bracket (4), using the form of the stick in the inside for being partly extended to the gearbox (608), the first end of the double end bar (5) is designed to be connected to the change that control cable (C) makes the load being applied on control cable (C) cause transmission ratio.)

1. a kind of gearbox (608) for mechanization farm implements, makes motor-driven component and is used to drive the element of the farm implements mutual Even, the gearbox (608) includes:

Input shaft (21) is adapted to be driven in a rotative pattern by the motor-driven component；

Output shaft (23) is adapted to drive the driving element of the farm implements；

Pinion gear, referred to as sliding pinion (11) are mounted for moving on the input shaft, and are adapted to using at least A kind of forward position, wherein reaching the first transmission ratio between the input shaft and the output shaft, axis is in identical rotation side Rotation upwards, and being adapted to using at least one reverse gear position, wherein reaching the between the input shaft and the output shaft Two transmission ratios, the axis rotate on relative rotation direction；

Mobile bracket (4) extend in the inside of the gearbox (608) and are adapted to assist with the sliding pinion (11) Make, and the transmission ratio between the input shaft (21) and the output shaft (23) can be modified by its movement；

It is characterized in that, the gearbox (608) also comprises control-rod (5), to control the movement of the bracket (4), Using the form of the stick in the inside for being partly extended to the gearbox (608), the first end of the control-rod (5) is adapted to The change for making the load being applied on control cable (C) cause gear ratio at control cable (C) is connected to.

2. gearbox (608) according to claim 1, which is characterized in that the control-rod (5) is mounted for being fixed to The bracket (4) is mounted for by the unit that the control-rod (5) and the bracket (4) are formed in the gearbox (608) It is moved in a rotative pattern on interior vertical pivot, the input shaft (21) and output shaft (23) horizontally extend.

3. gearbox (608) according to claim 1 or 2, which is characterized in that the shell of the gearbox (608) is by two A half portion hull shape is at being referred to as left side shell (9) and right side shell (10), described two half portion shells are assembled into convenient for vertical Facing each other and shell is defined as to accommodate the axis (21,23), the sliding pinion (12) and the control in closing line A part of bar (5) processed and the bracket (1), the half portion shell (9,10) are manufactured by injection-molded plastic.

4. gearbox (608) according to claim 3, which is characterized in that the first end of the control-rod (5) is prolonged Extend through manufactured lateral aperture (40) in first in the first half portion shell (9,10).

5. gearbox (608) according to claim 4, which is characterized in that the second end of the control-rod (5) extends through Cross manufactured lateral aperture (40) in second in the half portion shell (9,10).

6. gearbox (608) according to claim 4 or 5, which is characterized in that one or more aperture (40) sizes It is set to pass through air between the inside and outside of the shell.

7. gearbox (608) according to claim 5 or 6, which is characterized in that second end of the control-rod (5) Hold one outer surface being fixedly attached in the half portion shell (9,10) by means of return spring.

8. the gearbox according to any one of claim 3 to 7 (608), which is characterized in that described two half portion shells (9, 10) it is assembled by reversible attachment members, each of described half portion shell (9,10) includes its connecing with another half portion shell (9,10) Close the sealing element (13) on surface.

9. a kind of mechanization farm implements, which is characterized in that it includes according to claim 1 to gearbox described in any one of 8 (608)。

10. mechanization farm implements according to claim 9, which is characterized in that it includes control fixture (P) and control cable (C), the first end that control fixture (50) is connected to the control-rod (5) to be applied to by control cable (C) Any load on control fixture (P) causes the change of transmission ratio.

1, technical field

The present invention relates to the gearboxes for mobile device, especially for mechanization or the gearbox of motor-driven farm implements, and More precisely, being related to the gearbox for power tiller.

The invention further relates to mechanization farm implements, and more precisely, be related to include such gearbox power tiller and Motocultivator.

2, background technique

Gearbox for mechanization farm implements is intended for making the driving of the motor-driven component of mechanization farm implements and the farm implements Element interconnection.Such mechanization farm implements are, for example, power tiller, motocultivator, brush cutter or any equivalent farm implements.

State-of-the-art farm implements include the gearbox with one or more drive shifts.Pass through the movement to gear selector Conversion of (usually manual activity) Lai Shixian from a gear to another gear, the gear selector can be repaired by gear shift Change the transmission ratio of gearbox.

The reverse gear position that certain gearboxes also have convenient for manipulation when for example close to barriers such as tree root, stones, with And the clutch release mechanism convenient for the change with speed and the conversion from drive shift to reverse gear.

It is well known that such gearbox includes:

Input shaft is adapted to be driven in a rotative pattern by motor-driven component,

Output shaft is adapted to the driving element of driving farm implements,

Gear selector is adapted to cooperate with sliding pinion, and the sliding pinion is mounted in input shaft Upper movement is can modify the transmission ratio between input shaft and output shaft by its movement.

These gearboxes using large amount of complex mechanical part and be contained in shell made of aluminum.This makes them high It is expensive, heavy and huge.

In addition, have on the shell of these gearboxes oil with ensure to accommodate in shell all elements lubrication, especially axis and Pinion gear.Sealing-plug keeps the oil of interior of shell and is used for shell oil extraction if necessary.

In order to which these shells can have optimal seal quality, the upper half shell and lower half shell for constituting shell usually pass through glue It is combined dress.This to be an arduous operation from gearbox disassembly shell during maintenance and reparation.

In addition, oil vapour can lead to the over-voltage in the tight seal inner space of shell.

By means of control cable control, gear selector is connected to by the control cable to be placed on for example certain gearboxes Control handle on the handle of farm implements, control cable connection to bracket, the bracket directly work to sliding pinion so that It is moved along input shaft.The upper half shell that the upper end of bracket extends through shell control bracket can on the move.

However, such scheme is relatively complex and costly.

In addition, such gearbox needs periodic maintenance to adjust and/or change control cable.

Therefore need to be used in the gearbox of mechanization farm implements and specifically for the gearbox of power tiller Optimization of design.

3, goal of the invention

Therefore the present invention tries hard to overcome at least some of these disadvantages of prior art gearbox.

In at least one embodiment, the present invention tries hard to provide lighter and lower manufacturing cost than prior art gearbox tight Gather type gearbox.

In at least one embodiment, thus it is an object of the present invention to provide the speed changes including finite population mechanical organ Case, the gearbox realize the pole simple combination part of the different elements of mechanization farm implements and provide low cost manufacturing.

In at least one embodiment, the present invention further seeks to provide the speed change at least one drive shift and a reverse gear Case, wherein the conversion of drive shift to reverse gear can be rapidly completed.

In at least one embodiment, the present invention tries hard to provide the mechanization farm implements equipped with gearbox, the gearbox It is easy to maintain and without frequent maintenance and service life is more than prior art gearbox.

4, summary of the invention

For this purpose, making motor-driven component the present invention relates to a kind of gearbox for mechanization farm implements and being used to drive The element interconnection of the farm implements, the gearbox include:

Input shaft is adapted to be driven in a rotative pattern by the motor-driven component；

Output shaft is adapted to drive the driving element of the farm implements,

Pinion gear, referred to as sliding pinion are mounted for moving on input shaft, and are adapted to using at least one Kind forward position, wherein reaching the first transmission ratio between input shaft and output shaft, axis rotates on identical direction of rotation, and It is adapted to using at least one reverse gear position, wherein reaching the second transmission ratio between input shaft and output shaft, axis is in opposite rotation Turn to rotate on direction,

Mobile bracket, extends in the inside of gearbox and is adapted to cooperate with the sliding pinion, and pass through it Movement can modify the transmission ratio between input shaft and output shaft.

According to the present invention, gearbox also comprises the control-rod of the movement to control the bracket.This control-rod is adopted The form of the stick in the inside for being partly extended to gearbox is taken, the first end of the control-rod is adapted for connecting to control electricity Cable, which to be applied to, controls the change that any load on cable causes gear ratio.

The present invention proposes that a kind of power tiller, the power tiller include that reliable and inexpensive instrument rotation reverses System.

Gearbox is via control cable control, and the control cable is by the control fixture on the handle for being placed on such as farm implements It is connected to a bar, the bar is connected to bracket, and the bracket directly works to sliding pinion so that it is moved along input shaft.

Conversion from drive shift to reverse gear can be rapidly completed.In an identical manner, it when gearbox is in reverse gear position, uses Family is easily quickly transferred to any forward position.

The driving of gearbox of the invention reverses unit to have finite population mechanical organ, is achieved in composition gearbox Different elements pole simple combination part and reduce manufacturing cost.

A particular aspects according to the present invention, control-rod is mounted for being fixed to the bracket, by control-rod and branch The unit that frame is formed is mounted for moving in a rotative pattern on the vertical pivot in gearbox, and input shaft and output shaft horizontally prolong It stretches.

A particular aspects according to the present invention, the shell of gearbox is by two half-unit hull shape at being referred to as left side Shell and right side shell, described two half portion shells are assembled into convenient for the facing each other in vertical closing line or cementing line and limit shell Fixed a part at receiving axis, sliding pinion and control-rod and bracket, exactly, the half portion shell is by injection molding Plastics manufacture.

A particular aspects according to the present invention, the first end of the control-rod extend through the upper half shell In first in manufactured lateral aperture.

A particular aspects according to the present invention, the second end of the control-rod extend through in the half portion shell Manufactured lateral aperture in two.

A particular aspects according to the present invention, one or more aperture sizes are set to make air in shell Pass through between portion and outside.

A particular aspects according to the present invention, the second end of the control-rod are fixedly attached by means of return spring To one outer surface in the half portion shell.

A particular aspects according to the present invention, two half-unit shell are assembled by reversible attachment members, in the half portion shell Each includes the sealing element on its engagement surface with another half portion shell.

The invention further relates to a kind of mechanization farm implements including gearbox according to the present invention.

A particular aspects according to the present invention, the farm implements include control fixture and control cable, the control cable Any load being applied on control fixture is made to cause to pass the first end that the control fixture is connected to the control-rod The change of dynamic ratio.

Preferably, mechanization farm implements according to the present invention belong to including motocultivator, the brush cutter of belt wheel, power ploughing and weeding Machine, small power cultivator, mower-shredder, earth scraper, except the group of withered grass machine and lawn loosenning tiller.

The invention further relates to a kind of gearbox and it is related to a kind of whole for having the combination of its feature and referring to above or below Or the farm implements of the gearbox of Partial Feature.

Other features and advantages of the present invention will be described below from reference attached drawing is only used as that Non-exhaustive example provides Show, in the attached drawing:

- Fig. 1 is point for showing a part of the farm implements according to an embodiment of the invention of shell of instrument drive chain Solve perspective view or four/three-view diagram；

- Fig. 2 is to show gearbox according to an embodiment of the invention, the gear selector of gearbox, clutch skin The exploded perspective of a part of the farm implements according to an embodiment of the invention of band and driving belt pulley and reception belt pulley Figure or four/three-view diagram；

- Fig. 3 is the decomposition perspective view or four/three-view diagram of gearbox according to an embodiment of the invention；

- Fig. 4 is free from shell but shows control cable and control the view of the element of the gearbox of Fig. 3 of fixture；

- Fig. 5 is sectional view of the gearbox of Fig. 3 in perpendicular；

- Fig. 6 A and 6B be show be mounted on power tiller in the gearbox of Fig. 3 that covers (contain and be free of half portion shell In one) perspective view or four/three-view diagram；

- Fig. 7 is the front view for showing the half portion shell of groove, and the groove accommodates two half-unit shell and is locked to by sealing element The O ring seal between sawtooth in groove.

6, specific embodiment

Gearbox or transmission device according to the present invention are intended for being mounted on such as power tiller mechanization farm implements.

Through described in detail below, each section of gearbox is otherwise described as it unless otherwise stated referring to schema Placement when ground extends is parallel in the input shaft and output shaft of gearbox.

This placement or layout are shown especially in Fig. 3, and Fig. 3 is power tiller according to an embodiment of the invention Gearbox perspective view in decomposition view.

As illustrated in Fig. 1 and 2, power tiller preferably includes the frame for supporting gearbox 608 according to the present invention (not shown), transmission wheel and two ploughing and weeding instrument (not shown), the ploughing and weeding instrument surround the chain by being placed in shell 606 mobile lateral shafts are rotatably mounted in below frame, and two cheeks of the shell mark in Fig. 1 is.

In general, chain 606 is by being positioned at connecing for the belt pulley being higher than in the rear portion of its frame (referred to as reception belt pulley 600) Foot driving.It receives belt pulley 600 itself and is driven by being located at the heat engine in front of frame, the output shaft of motor is carried through clutch skin The driving belt pulley 610 for receiving belt pulley 600 is connected to 609.Belt pulley 600 is received to link with gearbox 608 and instrument.Become The output shaft 23 of fast case 608 is found in Fig. 1.

As illustrated in Figure 3, gearbox 608 include by two half-unit hull shape at shell, i.e. 10 He of left side shell One right side shell 9.

Therefore, with include along horizontal closing line assembling upper half shell and lower half shell prior art gearbox shell On the contrary, two lateral half portion shells 9,10 are assembled along vertical closing line.

Two half portion shells 9,10 of shell are made and of injection-molded plastic (polyamide that such as fibrous glass is strengthened) not by such as Aluminium in the case where prior art shell is made.

Therefore the shell of gearbox 608 is light, manufacturing cost is few and still sufficiently stable with support shaft and gear drive structure Part.

Advantageously, half portion shell 9,10 is fixedly attached to each other by means of screw 14, and the screw is directly inserted into composition In the plastics of these half portion shells.

Inside the housing, the input shaft 21 at top and the output shaft 23 (Fig. 4 to 6B) at lower part are accommodated.

According to the embodiment of schema, input shaft 21 is parallel with output shaft 23 and extends in a horizontal plane.

In addition, in this embodiment, gearbox 608 provides drive shift and reverse gear.

Input shaft 21 is carried on each of its end by bearing 18,19.On this input shaft 21, installation sliding Pinion gear 11 and loose pinion 3.

Output shaft 23 is carried on each of its end by bearing 18,19.On this output shaft 23, installation has Different-diameter and the feeder wheel being spaced apart by spacer 8 or pinion gear 90 and reverse gear wheel or pinion gear 100.

It must be pointed out that the pinion gear of gearbox 608 is preferably made of sintering comminuted steel shot and therefore has low manufacturing cost.

In operation, input shaft 21 is mobile by the driving motor of power tiller and drives output shaft by means of chain 20 23。

Gearbox 608 is arranged so that sliding pinion 11 can occupy two different locations: progressive position along input shaft 21, The first transmission ratio is wherein obtained between input shaft 21 and output shaft 23, axis 21,23 rotates on identical direction of rotation；And reverse gear Position, wherein obtaining the second transmission ratio between input shaft 21 and output shaft 23, axis 21,23 rotates on relative rotation direction.

Feeder wheel 90 is cooperated with free pulley 3 by means of chain 20 in progressive position and (is seen in the section in Fig. 5), and reverse gear Wheel 100 is adapted to cooperate with the sliding pinion 11 at reverse gear position.

Therefore, advantageously, pinion gear be reverse operation needed for, in this case, sliding pinion 11 and reverse gear wheel 100 Only (or working) is run when selecting reverse gear.

Preferred embodiment in accordance with the present invention, the control cable C by means of being connected to control fixture P obtain changing for transmission ratio Become, the control fixture is placed on the handle (Fig. 4) of such as farm implements.

Control cable C is connected to the starting control-rod 5 for being fixedly attached to bracket 4, and the bracket is directly to the small tooth of sliding Wheel 11 work so that sliding pinion the position that it cooperate with reverse gear wheel 100 (in reverse gear position) with its not with output shaft It is moved between the position of 23 any pinion gear (in progressive position illustrated in fig. 5) cooperation along input shaft 21.

Control-rod 5 takes the form of stick, and the central part of the stick is cylindrical, and this control-rod is fixedly mounted in On bracket 4, sub-assembly is mounted for moving inside the shell in a rotative pattern so that user causes to control to the movement of control fixture P The rotation of bar 5 and bracket 4 processed, and therefore move sliding pinion 11 and engage it with reverse gear wheel 100.

It must be pointed out and take this control-rod 5 of bar form connecing vertically in the two half-unit shell 9,10 with gearbox 608 Extend in the plane of zygonema transverse direction.

In addition, control-rod 5 extends in the plane parallel with the axis of input shaft 21 and output shaft 23.

When user loosens control fixture P, sliding pinion 11 no longer cooperates with reverse gear wheel 100.

The upper end of bracket 4 has connector 41, and the connector is contained in the aperture or slit 51 of control-rod 5 (Fig. 4). This bar 5 is only extended loaded on 4 top of bracket and on the two sides of connector 41 by gravity safety.The rotary shaft of control-rod 5 and bracket 4 is Vertical, and the axis vertical take-off with input shaft 21 and output shaft 23.

Spacer 7 is pressed into advance in the upper connection and lower connector 41 of bracket 4.These spacers are in slit Loop type passes through for the connector 41 of bracket 4.

Control-rod 5 is partly extended in the inside of shell and is pivotally mounted to this interior of shell.

The central cylindrical portion and lower part spacer 7 of control-rod 5 are contained in the semicircle formed in the wall of half portion shell 9,10 In cylindrical outer cover 22.

The end of control-rod 5 extends transversely through the aperture 17 (Fig. 6 A and 6B) formed in the half portion shell 9,10 of shell, So that user can start control-rod 5 and therefore the starting control bracket 1 when operation controls fixture P.

These apertures 17 for being used for the channel of the end of control-rod 5 do not need any sealing element and can make the interior of shell It opens in portion space.

Shell is therefore endless hermetically sealed, this is different from needing to be entirely sealed against only oil leakage and showing there are over-voltage risk There is technology shell.

The conversion from drive shift to reverse gear is obtained by mobile control fixture P, the control fixture itself is by means of control Cable C processed carrys out the moving in rotation of drive control bar 5, and the then moving in rotation of driving arm 4, to determine sliding pinion 11 Position is in the position for limiting the gear ratio between input shaft 21 and output shaft 23.

The first end of control-rod 5 is fixedly attached to control cable C by means of spring 6B.

The second end opposite with first end of control-rod 5 is fixedly attached to return spring 6A so that bracket 4 (and because This control-rod 5) it can be returned to its initial position, i.e. progressive position, return spring 6A is fixedly attached to the outer surface of shell And the outer surface of especially half portion shell 9.

Locate at its end, there is control-rod 5 access opening to connect spring 6A, 6B with hook.

Thus the present invention proposes that a kind of power tiller, the power tiller have reliable and low cost instrument rotation Reverse system.

The stop element 12 formed in each of half portion shell is for the bracket 4 in backstop rotation and therefore backstop is sliding The translation of dynamic pinion gear 11.The nose 42 of bracket is likely to contact these stop elements 12 of bracket.This prevents half portion shell from propping up The shock of frame 4 and non-under the influence of abrasion to be plastically deformed or be recessed.

The design (especially interior shape) of shell makes it possible to around the chain and pinion gear and in these elements Implement one layer of lubricating grease between the inner wall of shell (different from using oil to make that this shell must be discharged when necessary inside the shell Oil conventional gearbox).

Due to the limited inner room of shell, the gap between the inner wall of shell and the chain and pinion gear is minimum.Work as institute When stating chain and moving in a rotative pattern, the lubricating grease of splashing is sent back to by the inner wall of shell towards the chain.Therefore lubricating grease demand It is limited.

The filling plug 15 being placed in filling aperture 16 makes it possible to preferentially lubricate chain 20, and the filling aperture is defeated Enter and is positioned between axis and the channel of output shaft on the right side shell 9 of Fig. 3.

Advantageously, the sealing of shell (sub-assembly especially between half portion shell 9 and 10) is placed in half portion shell 9 by implementing Ensure with the U-shaped O ring seal 13 on 10 inner surface, the base portion of " U " is located at the low portion of half portion shell 9 and 10.

More specifically, o-ring 13 is contained in the U-shaped groove 131 formed in the inner engagement surface of half portion shell 10.It is left The joint surface of half portion shell 9 be in itself it is completely flat and smooth, to assemble the phase in the screw-in of half portion shell 9 and 10 Between extruding to o-ring 13 is provided.

Cylindrical o-ring 13 is for example made of nitrilic type material, or is made of another suitable material.

Sealing element 13 can be held in respective slot 131 by one or more locking teeths 1321.

According to a specific embodiment illustrated in fig. 7, five set 132 of three locking teeths 1321 are formed in half portion In the U-shaped groove 131 of shell 10.

This encapsulation scheme is advantageous, and wherein it makes it possible to be easily installed sealing during the service life of product Part is easy to dismantle shell from gearbox during the operation safeguarded or repaired, and realizes these operations without damaging sealed horizontal.

In fact, the sealing of the half portion shell of the gearbox of mechanization farm implements is usually provided by splicing portion.This is lacked with various Point (cleaning or scratch-off surface before gluing, disassembly is complicated, with the deterioration risk of internal part or half portion shell).

Ventilation is provided by aperture 17 with the channel of the control-rod 5 for being formed in each of half portion shell 9,10.This is anti- Only need added holes or flame-arrester vent plug.It is formed in due to channel aperture 17 in the top of half portion shell, lubricating grease cannot be from shell Evolution.

In addition, there is no " SPI " the type sealing element or the rotation shaft seals that are implemented on output shaft 23 and input shaft 21, and This reduces the complexity and cost of gearbox of the invention.

In short, the maintenance of gearbox according to the present invention is particularly simple, this is because:

Selected encapsulation scheme, wherein using O ring seal, shell is not such as the speed change of most of commercially available device Case is the same " gluing "；

Selection cable need not be adjusted；

With lubricator with lubrication mode (using extremely basic lubricating grease, being easier to manage than oil).

Fig. 5 is the sectional view of the perpendicular of gearbox 608, shows the positioning of the bracket 4 on sliding pinion 11.

Fig. 6 A and 6B are shown by the way that gearbox 608 (containing and be free of half portion shell 10) is directly screwed in power tiller It is installed on inner cover 609, head protector (not shown) is subsequently fitted to cover in described.

The present invention is not limited only to described single embodiment.

The power tiller as described in present application can be with the different types of gearbox of gearbox shown by schema Implement together.

Exactly, gearbox according to the present invention can have different inside structures.

For example, input shaft and output shaft can be coaxial, and gearbox can have different number of gear, especially two Or more drive shift.