CN201609037U

CN201609037U - Multifunctional grass trimmer

Info

Publication number: CN201609037U
Application number: CN2010201108148U
Authority: CN
Inventors: 韩焕忠
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2010-02-03
Filing date: 2010-02-03
Publication date: 2010-10-20
Anticipated expiration: 2020-02-03
Also published as: WO2011094958A1

Abstract

The utility model discloses a multifunctional grass trimmer which comprises a main handle assembly, a machine rod and a grass edge trimming mechanism. The top part of the grass edge trimming mechanism is provided with a main housing assembly. The bottom of the main housing assembly is provided with a roller supporting mechanism. The top of the machine rod is movably sleeved with the housing of the main handle assembly through a conversion mechanism. The bottom of the machine rod is hinged to the main housing assembly through a connecting mechanism. An elastic braking device which is rotated by a card connecting mechanism is provided between the connecting mechanism and the main housing assembly. The multifunctional grass trimmer has two functions of edge trimming and grass trimming. Furthermore the two functions can be converted quickly and conveniently. The elastic braking device can cause the grass trimmer to obtain excellent operation reliability and stability in operating under the two functions and improves the efficiency of garden operation.

Description

A kind of multifunctional grass mowing machine

Technical field

The utility model relates to a kind of garden instrument, especially a kind of multifunctional grass mowing machine.

Background technology

Mower is a kind of instrument commonly used in the operation of gardens, be specially adapted to finishing to the lawn, the finishing on lawn the beating the grass, mowing on common plane, also need cut edge, the operation on the dimensional orientation such as deburring, but general mower function is all more single, other multiple instruments that the gardener must be equipped with except that mower just can fulfil assignment, this just makes the acquisition cost of equipment improve, and the frequent replacing of multiple Tool Room makes gardener's labour intensity strengthen, and operating efficiency reduces.

In the patent No. is in the patent of " 200420121263.X ", a kind of electric tool (lawn care instrument) is disclosed, comprise handle assembly, working head, handle assembly is rotationally connected by jockey and working head, by handle assembly with respect to the rotation of working head realize working head beat the grass with two kinds of functions of deburring conversion, also setting up a roller that plays the support guide effect during in the working head deburring on the working head simultaneously, though this patent solves the shortcoming of original mower function singleness, but its function, also there is following shortcoming in structure: the one, and handle assembly is not located after rotating with respect to working head, the easy double swerve of working head causes deburring irregular during deburring; The 2nd, only adopt a roller to come the support works head during deburring operation, the poor work stability of working head, and the height of beating the grass during deburring can not be regulated.

Summary of the invention

Problem to be solved in the utility model just provides a kind of compact conformation, easy to operate, multifunctional grass mowing machine flexibly, conversion in again guarantee fast that in the function that realizes beating the grass, trimming function and two kinds of functions mower all has good operation reliability and stability during operation under two kinds of functions, improve the gardens operating efficiency.

For reaching above-mentioned purpose, the utility model adopts following technical scheme: a kind of multifunctional grass mowing machine, comprise main handle assembly, machine bar and the deburring mechanism of beating the grass, the deburring mechanism top of beating the grass is provided with the main case assembly, main case assembly bottom is provided with the roller supporting mechanism, the housing of the top of described machine bar and main handle assembly is by the active socket of switching mechanism, machine bar bottom is articulated on the main case assembly by bindiny mechanism, it is characterized in that: also be provided with the resilient device that blocking bindiny mechanism rotates between described bindiny mechanism and main case assembly.

Further, described bindiny mechanism is the connection housing that is fixedly plugged in machine bar bottom, laterally is coated with rotating shaft on the housing of main case assembly, and described connection housing is articulated in the rotating shaft, and described resilient device blocking connects the rotation of housing.

Further, described resilient device comprise active be installed in the ratchet in the rotating shaft and be packed in be used for the cylinder assembly that the blocking ratchet rotates in the main case assembly, described ratchet is with to be connected housing affixed, described cylinder assembly comprises cylinder body, the secondary air cavity that is provided with main air cavity in the cylinder body and communicates with main air cavity, be provided with piston rod in the described main air cavity, clamped spring between the inner top surface of piston rod and the bottom surface of main air cavity, the front end face of piston rod is provided with the screens projection that the teeth groove with ratchet matches, be provided with a ball in the described secondary air cavity, this ball by the stage clip of being located at secondary air cavity rear with its elasticity sealing-in at secondary air cavity and main air cavity connected entrance place; The inwall upper edge ratchet periphery of described connection housing is periphery and is useful on the protection coaming plate that the rotation of ratchet is led, and described protection coaming plate is connected on the housing of main case assembly.

Further, described roller supporting mechanism comprises wheel shank I, wheel shank II, the inner of described wheel shank I and wheel shank II is by being provided with the housing bottom of disk concentric switching at the main case assembly, and wheel shank I is positioned at the top of wheel shank II, and roller is equipped with in the outer end of wheel shank I and wheel shank II; The outer eaves of the disk of wheel shank I the inner central angle alpha at interval is provided with locating hole I and locating hole I ', vertical active elastic positioning pin that installs is fixed on wheel shank I on the housing of main case assembly in the locating hole I, under wheel shank I and wheel shank II coincidence status, the outer eaves of the disk of wheel shank II is provided with the locating hole II corresponding up and down with locating hole I ', at wheel shank II after its disk rotates a central angle alpha, locating hole II is fastened on the rotation of elastic positioning pin one lateral confinement ratch handle II, under the choosing of elastic positioning pin blocking state, wheel shank I and wheel shank II are bifurcation structure and are used to support the deburring mechanism of beating the grass under the vertical state, and wheel shank I is identical with described central angle alpha with the bifurcation angle of wheel shank II.

Further, also be provided with the torsion spring that wheel shank II is drawn in to wheel shank I direction between described wheel shank I and the wheel shank II, the spring arm elasticity of described torsion spring upper end is connected in the disk of wheel shank I, and the spring arm of torsion spring lower end elasticity in the other direction is connected in the disk of wheel shank II.The setting of torsion spring can make wheel shank II reset, to the wheel shank II application of force, and the beating the grass height in the time of can regulating deburring, and wheel shank II is when stressed, and torsion spring also can play certain cushioning effect.

Further, described switching mechanism comprises and is installed on machine masthead portion along machine bar axially the rim gear wheel I and the rim gear wheel II of engagement, rim gear wheel I and machine bar are affixed, the housing of rim gear wheel II and main handle assembly is affixed, is positioned at also to be with the stage clip elastic top on the machine bar of main handle assembly shell and to be connected on rim gear wheel I bottom.

Further, the socket place of the top of described machine bar and machine bar and main handle assembly shell is provided with elastic band, annular groove is set on the inner walls of main handle assembly blocks elastic band and realize that the main handle assembly shell is connected with the elasticity of machine bar; Leave the annular gap between the inwall of described rim gear wheel I and rim gear wheel II and the outer wall of machine bar, this annular gap and described elastic band are formed shock-damping structure.

Further, also be hinged with the auxiliary-handle assembly on the housing of described main handle assembly, described auxiliary-handle assembly comprises auxiliary-handle seat and auxiliary-handle handle, fixedly be coated with bull stick in the described auxiliary-handle handle, the two ends switching of described bull stick is at the top of auxiliary-handle seat housing, auxiliary-handle seat housing bottom is provided with movable ratchet, the two sides of described movable ratchet are provided with corresponding bearing pin and are used for the active Connection Block of being located at two ends, auxiliary-handle seat bottom that is installed on, the housing of main handle assembly is provided with and the fixed ratchet wheel of movable ratchet shaft to engagement, wherein be provided with the spring that movable ratchet is pushed away the engagement direction between a side of a connecting seat and movable ratchet, another Connection Block is provided with the wedge shape fixture block of movable ratchet top to the engagement direction, the lozenges of described wedge shape fixture block is towards movable ratchet, is provided with in the auxiliary-handle seat by the auxiliary-handle handle to drive the make progress hoisting mechanism of tractive of wedge shape fixture block.

Further, described hoisting mechanism comprises that being located at auxiliary-handle seat top rotates the fixed block that rises with the bull stick end, described fixed block connects described wedge shape fixture block by a haul line, is provided with the spring that the wedge shape fixture block is pushed up back original position between wedge shape fixture block upper surface and auxiliary-handle seat housing.

Further, also be provided with in the described deburring mechanism of beating the grass and change the beat the grass adjusting device of height of the deburring mechanism of beating the grass, described adjusting device comprises a pair of road wheel of being located at the deburring mechanism housing limit eaves of beating the grass, described road wheel is connected by the wheel pendulum with the housing of the deburring mechanism of beating the grass, wheel is laid out end and is connected with rotating shaft, the rotating shaft two ends are fixed with ratchet I, beat the grass corresponding wheel pendulum junction on the housing of deburring mechanism be provided with the rotating shaft switching and with two ratchet II of ratchet I elasticity pressurized engagement, the housing of deburring mechanism of beating the grass is provided with an eccentric rod, and the major axis end face of described eccentric rod is pressed on the outer face of a ratchet II wherein when ratchet I and ratchet II engagement.When road wheel lands, can realize that one hand holds to beat the grass.

The beneficial effects of the utility model: the utility model not only has deburring, the two kinds of functions of beating the grass, and these two kinds of functions can be changed quickly and easily, the resilient device can make mower all have good operation reliability and stability during operation under two kinds of functions, improves the gardens operating efficiency; Employed handle of the utility model and auxiliary-handle all carry out corresponding rotation again during the mower functional mapping, after rotation, equally realize the location, flexible operation, convenience, good stability, all be provided with shock-damping structure on machine bar and handle and the roller supporting mechanism, protect each parts in the mower not to be subjected to vibration influence, more stable work, can also reduce noise simultaneously; The utility model can carry out the adjusting of height when beating the grass with deburring, thereby can better cut the grass on a lawn.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is the syndeton schematic diagram of the utility model machine bar and main handle assembly;

Fig. 3 is the structural representation of the utility model auxiliary-handle assembly;

Fig. 4 is the enlarged drawing at A place among Fig. 3;

Fig. 5 is the enlarged drawing at B place among Fig. 3;

Fig. 6 is the structural representation of the utility model changeover mechanism and resilient device;

Fig. 7 is the enlarged drawing at C place among Fig. 6;

Fig. 8 is the enlarged drawing at D place among Fig. 7;

Fig. 9 is the structural representation of the utility model roller supporting mechanism;

Figure 10 is the end view of Fig. 9;

Figure 11 is the scheme of installation of torsion spring in the roller supporting mechanism;

Figure 12 is the structural representation of adjusting device in the deburring mechanism of beating the grass;

Figure 13 is the enlarged drawing at E place among Figure 11.

Embodiment

As shown in Figure 1 and Figure 2, a kind of multifunctional grass mowing machine of the utility model, comprise main handle assembly 2, machine bar 1 and the deburring mechanism 3 of beating the grass, deburring mechanism 3 tops of beating the grass are provided with main case assembly 4, main case assembly 4 bottoms are provided with the roller supporting mechanism, and the housing of the top of described machine bar 1 and main handle assembly is by the active socket of switching mechanism, and machine bar 1 can rotate with respect to main handle assembly 2 around self axial line, simultaneously, main handle assembly 2 also can rotate around machine bar 1 axial line; Switching mechanism comprises and is installed on machine bar 1 top along machine bar 1 axially the rim gear wheel I 21 and rim gear wheel II 22 of engagement, rim gear wheel I 21 is affixed with machine bar 1, rim gear wheel II 22 is affixed with the housing 20 of main handle assembly, is positioned at also to be with stage clip 23 elastic top on the machine bar 1 of main handle assembly shell 20 and to be connected on rim gear wheel I 21 bottoms; The top of described machine bar 1 and machine bar 1 is provided with elastic band 24 with the socket place of main handle assembly shell, annular groove 25 is set on the inner walls of main handle assembly blocks elastic band and realize that the main handle assembly shell is connected with the elasticity of machine bar 1; Leave the annular gap between the inwall of described rim gear wheel I 21 and rim gear wheel II 22 and the outer wall of machine bar 1, this annular gap and described elastic band are formed shock-damping structure.

As Fig. 3, Fig. 4, shown in Figure 5, also be hinged with auxiliary-handle assembly 6 on the housing 20 of described main handle assembly, described auxiliary-handle assembly 6 comprises auxiliary-handle seat 61 and auxiliary-handle handle 60, fixedly be coated with bull stick 62 in the described auxiliary-handle handle 60, the two ends switching of described bull stick 62 is at the top of auxiliary-handle seat 61 housings, auxiliary-handle seat 61 housing bottoms are provided with movable ratchet 64, the two sides of described movable ratchet 64 are provided with corresponding bearing pin 65 and are used for the active Connection Block 66 of being located at two ends, auxiliary-handle seat 61 bottom that is installed on, the housing 20 of main handle assembly is provided with the fixed ratchet wheel 26 that axially meshes with movable ratchet 64, wherein be provided with the spring 67 that movable ratchet 64 is pushed away the engagement direction between a side of a connecting seat and movable ratchet 64, another Connection Block is provided with the wedge shape fixture block 68 of movable ratchet 64 tops to the engagement direction, the lozenges of described wedge shape fixture block 68 is towards movable ratchet 64, is provided with in the auxiliary-handle seat 61 by auxiliary-handle handle 60 to drive wedge shape fixture block 68 hoisting mechanism of tractive upwards.Described hoisting mechanism comprises that being located at auxiliary-handle seat 61 tops rotates the fixed block 69 that rises with bull stick 62 ends, described fixed block connects described wedge shape fixture block 68 by a haul line 63, is provided with the spring 681 that wedge shape fixture block 68 is pushed up back original position between wedge shape fixture block 68 upper surfaces and auxiliary-handle seat 61 housings.

To shown in Figure 8, the utility model machine bar 1 bottom is articulated on the main case assembly by bindiny mechanism is set as Fig. 6, and 4 of described bindiny mechanism and main case assemblies also are provided with the resilient device that blocking bindiny mechanism rotates.Described bindiny mechanism is the connection housing 50 that is fixedly plugged in machine bar 1 bottom, laterally is coated with rotating shaft 41 on the housing 40 of main case assembly, and described connection housing 50 is articulated in the rotating shaft 41, and described resilient device blocking connects the rotation of housing; Machine bar 1 can rotate around the axis with respect to the main case assembly in the certain angle scope.The resilient device comprise active be installed in the ratchet 51 in the rotating shaft 41 and be packed in be used for the cylinder assembly that blocking ratchet 51 rotates in the main case assembly 4, described ratchet is with to be connected housing affixed, described cylinder assembly comprises cylinder body 42, the secondary air cavity 44 that is provided with main air cavity 43 in the cylinder body and communicates with main air cavity, be provided with piston rod 45 in the described main air cavity, clamped spring 46 between the inner top surface of piston rod and the bottom surface of main air cavity, the front end face of piston rod is provided with the screens projection 451 that the teeth groove with ratchet matches, be provided with a ball 47 in the described secondary air cavity 44, this ball by the stage clip 471 of being located at secondary air cavity rear with its elasticity sealing-in at secondary air cavity and main air cavity connected entrance place.Described connection inner walls is periphery along the ratchet periphery and is useful on the protection coaming plate 52 that ratchet 51 is led, and described protection coaming plate 52 is connected on the housing 40 of main case assembly.

When machine bar 1 drives the rotation of connection housing, ratchet is corresponding to rotate around the axis, the rotation of ratchet is moved piston rod backward, ball is because gas pressure motion compresses stage clip backward, rotate stop after, stage clip promotes ball and travels forward, utilize air pressure with piston rod to sinciput, owing to all have air pressure on the piston rod both ends of the surface, so piston rod can only rely on spring in self the blocking ratchet that slowly moves ahead, thereby realizes connecting the simple and efficient rotation of housing.

Extremely shown in Figure 11 as Fig. 9, roller supporting mechanism of the present utility model comprises wheel shank I 48, wheel shank II 49, described wheel shank I 48 transfers in housing 40 bottoms of main case assembly by disk 482,492 concentrics are set with the inner of wheel shank II 49, wheel shank I 48 is positioned at the top of wheel shank II 49, wheel shank I 48 is equipped with roller 481,491 with the outer end of wheel shank II 49; The disk 482 outer eaves of wheel shank I 48 the inners central angle alpha at interval are provided with locating hole I 483 and locating hole I ' 484, vertical active elastic positioning pin 7 that installs is fixed on wheel shank I 48 on the housing 40 of main case assembly in the locating hole I 483, under wheel shank I 48 and wheel shank II 49 coincidence status, the disk 492 outer eaves of wheel shank II 49 are provided with the corresponding locating hole II 493 about in the of 484 with locating hole I ', at wheel shank II 49 after its disk rotates a central angle alpha, locating hole II 493 is fastened on the rotation of elastic positioning pin 7 one lateral confinement ratch handle II49, under the choosing of elastic positioning pin 7 blocking states, wheel shank I 48 and wheel shank II49 are bifurcation structure and are used to support the deburring mechanism 3 of beating the grass under the vertical state, and wheel shank I 48 is identical with described central angle alpha with the bifurcation angle of wheel shank II 49.

Also be provided with the torsion spring 8 that wheel shank II49 is drawn in to wheel shank I 48 directions between described wheel shank I 48 and the wheel shank II 49, the spring arm elasticity of described torsion spring 8 upper ends is connected in the disk of wheel shank I 48, and the spring arm of torsion spring 8 lower ends elasticity in the other direction is connected in the disk of wheel shank II 49.The setting of torsion spring 8 can make wheel shank II 49 reset, to wheel shank II 49 application of forces, and the beating the grass height in the time of can regulating deburring, and wheel shank II 49 is when stressed, and torsion spring 8 also can play certain cushioning effect.

As Figure 12, shown in Figure 13, also be provided with in the described deburring mechanism 3 of beating the grass and change the beat the grass adjusting device of height of the deburring mechanism 3 of beating the grass, described adjusting device comprises a pair of road wheel 31 of being located at the deburring mechanism 3 housing limit eaves of beating the grass, described road wheel 31 is connected by wheel pendulum 32 with the housing 30 of the deburring mechanism of beating the grass, wheel pendulum 32 upper ends are connected with rotating shaft 33, the rotating shaft two ends are fixed with ratchet I 34, beat the grass corresponding wheel pendulum 32 junctions on the housing of deburring mechanism 3 be provided with the rotating shaft switching and with two ratchet II 35 of ratchet I 34 elasticity pressurizeds engagement, the housing of deburring mechanism 3 of beating the grass is provided with an eccentric rod 36, ratchet I 34 during with ratchet II 35 engagements the major axis end face of described eccentric rod be pressed on wherein on the ratchet II outer face.When road wheel 31 lands, can realize that one hand holds to beat the grass.

Beat the grass function when being transformed into trimming function from mower, earlier machine bar 1 is gone to the state parallel with the deburring mechanism 3 of beating the grass, promptly as shown in Figure 6, after rotation stops, the blocking of resilient device connects housing and realizes machine bar 1 location, rotates machine bar 1 and makes the deburring mechanism 3 of beating the grass become vertical state with ground, pushes wheel shank II49 simultaneously aside, make 48 one-tenth bifurcated support structure of wheel shank II 49 and wheel shank I on the ground, can realize the trimming function of mower; In order to be suitable for operation, after finishing the function conversion, machine bar 1 is drop-down or will draw on the main handle assembly, make rim gear wheel I 21 and rim gear wheel II 22 break away from engagement mutually, the operator can rotate an angle with the main handle assembly with respect to machine bar 1 according to the operating habit of oneself, unclamping machine bar 1 or main handle assembly then meshes rim gear wheel I 21 and rim gear wheel II 22 once more, 1 on main handle assembly and machine bar are realized the location, this moment operator grasps main handle assembly housing, the promotion deburring mechanism 3 of beating the grass carries out deburring, and the auxiliary-handle handle 60 that also can hold the auxiliary-handle assembly simultaneously of bimanualness carries out the deburring operation; When deburring, to the wheel shank II49 application of force, the height of beating the grass in the time of can regulating deburring, the torsion spring 8 between wheel shank I 48 and the wheel shank II 49 also can play certain cushioning effect, is not subjected to vibration influence during the work of protection mower inner body.

Playing deburring from mower can be transformed into when beating the grass function, the deburring mechanism 3 of will beating the grass earlier is transformed into state with ground level from vertical state, 1 commentaries on classics of backward rotation machine bar makes it angled with the deburring mechanism 3 of beating the grass again, can realize the function of beating the grass, this moment, wheel shank I 48 can automatically revert to coincidence status with wheel shank II 49, can be used as protective frame when beating the grass uses, the adjusting device of this moment has played and has supported the double action of beating the grass deburring mechanism 3 and regulating the height of beating the grass, when road wheel 31 lands, can realize that one hand holds to beat the grass.

Except that above preferred embodiment, the utility model also has other embodiment, those skilled in the art can make various changes and distortion according to the utility model, only otherwise break away from spirit of the present utility model, all should belong to the defined scope of the utility model claims.

Claims

1. multifunctional grass mowing machine, comprise main handle assembly (2), machine bar (1) and the deburring mechanism (3) of beating the grass, the deburring mechanism top of beating the grass is provided with main case assembly (4), main case assembly (4) bottom is provided with the roller supporting mechanism, the housing (20) of the top of described machine bar (1) and main handle assembly is by the active socket of switching mechanism, machine bar (1) bottom is articulated on the main case assembly (4) by bindiny mechanism, it is characterized in that: also be provided with the resilient device that blocking bindiny mechanism rotates between described bindiny mechanism and main case assembly (4).

2. a kind of multifunctional grass mowing machine according to claim 1, it is characterized in that: described bindiny mechanism is for being fixedly plugged in the connection housing (50) bottom the machine bar (1), laterally be coated with rotating shaft (41) on the housing of main case assembly (40), described connection housing (50) is articulated in the rotating shaft, and described resilient device blocking connects the rotation of housing (50).

3. a kind of multifunctional grass mowing machine according to claim 2, it is characterized in that: described resilient device comprise active be installed in the ratchet (51) in the rotating shaft (41) and be packed in be used for the cylinder assembly that blocking ratchet (51) rotates in the main case assembly (4), described ratchet is with to be connected housing (50) affixed, described cylinder assembly comprises cylinder body (42), the secondary air cavity (44) that is provided with main air cavity (43) in the cylinder body and communicates with main air cavity, be provided with piston rod (45) in the described main air cavity, clamped spring (46) between the inner top surface of piston rod and the bottom surface of main air cavity, the front end face of piston rod is provided with the screens projection (451) that the teeth groove with ratchet matches, be provided with a ball (47) in the described secondary air cavity (44), this ball by the stage clip of being located at secondary air cavity rear (471) with its elasticity sealing-in at secondary air cavity and main air cavity connected entrance place; Inwall upper edge ratchet (51) periphery of described connection housing (50) is periphery and is useful on the protection coaming plate (52) that the rotation of ratchet is led, and described protection coaming plate is connected on the housing (40) of main case assembly.

4. according to claim 1 or 2 or 3 described a kind of multifunctional grass mowing machines, it is characterized in that: described roller supporting mechanism comprises wheel shank I (48), wheel shank II (49), the inner of described wheel shank I (48) and wheel shank II (49) is by being provided with disk (482,492) the concentric switching is in housing (40) bottom of main case assembly, wheel shank I (48) is positioned at the top of wheel shank II (49), wheel shank I (48) is equipped with roller (481,491) with the outer end of wheel shank II (49); The inner outer eaves of the disk interval central angle alpha of wheel shank I (48) is provided with locating hole I (483) and locating hole I ' (484), and the interior vertically active elastic positioning pin (7) that installs of locating hole I (483) is fixed on wheel shank I (48) on the housing (40) of main case assembly; Under wheel shank I (48) and wheel shank II (49) coincidence status, the outer eaves of disk (492) of wheel shank II (49) is provided with the locating hole II (493) corresponding up and down with locating hole I ' (484), at wheel shank II (49) after its disk (492) rotates a central angle alpha, locating hole II (493) is fastened on the rotation of elastic positioning pin (7) one lateral confinement ratch handle II (49), under the choosing of elastic positioning pin blocking state, wheel shank I (48) and wheel shank II (49) are bifurcation structure and are used to support the deburring mechanism (3) of beating the grass under the vertical state, and wheel shank I (48) is identical with described central angle alpha with the bifurcation angle of wheel shank II (49).

5. a kind of multifunctional grass mowing machine according to claim 4, it is characterized in that: also be provided with the torsion spring (8) that wheel shank II (49) is drawn in to wheel shank I (48) direction between described wheel shank I (48) and the wheel shank II (49), the spring arm elasticity of described torsion spring (8) upper end is connected in the disk of wheel shank I (48), and the spring arm of torsion spring (8) lower end elasticity in the other direction is connected in the disk of wheel shank II (49).

6. according to claim 1 or 2 or 3 described a kind of multifunctional grass mowing machines, it is characterized in that: described switching mechanism comprises and is installed on machine bar (1) top along machine bar axially the rim gear wheel I (21) and rim gear wheel II (22) of engagement, rim gear wheel I (21) is affixed with machine bar (1), the housing (20) of rim gear wheel II (22) and main handle assembly is affixed, is positioned at also to be with stage clip (23) elastic top on the machine bar (1) of main handle assembly shell and to be connected on bottom the rim gear wheel I (21).

7. a kind of multifunctional grass mowing machine according to claim 6, it is characterized in that: the socket place of the top of described machine bar (1) and machine bar (1) and main handle assembly shell (20) is provided with elastic band (24), annular groove (25) is set on the housing of main handle assembly (20) inwall blocks elastic band (24) and realize that the main handle assembly shell is connected with the elasticity of machine bar (1); Leave the annular gap between the outer wall of the inwall of described rim gear wheel I (21) and rim gear wheel II (22) and machine bar (1), this annular gap and described elastic band (24) are formed shock-damping structure.

8. according to claim 1 or 2 or 3 described a kind of multifunctional grass mowing machines, it is characterized in that: also be hinged with auxiliary-handle assembly (6) on the housing of described main handle assembly (20), described auxiliary-handle assembly comprises auxiliary-handle seat (61) and auxiliary-handle handle (60), fixedly be coated with bull stick (62) in the described auxiliary-handle handle (60), the two ends switching of described bull stick (62) is at the top of auxiliary-handle seat (61) housing, auxiliary-handle seat (61) housing bottom is provided with movable ratchet (64), the two sides of described movable ratchet (64) are provided with corresponding bearing pin (65) and are used for the active Connection Block (66) of being located at two ends, auxiliary-handle seat (61) bottom that is installed on, the housing of main handle assembly (20) is provided with the fixed ratchet wheel (26) that axially meshes with movable ratchet (64), wherein be provided with the spring (67) that movable ratchet (64) is pushed away the engagement direction between a side of a connecting seat (66) and movable ratchet (64), another Connection Block (66) is provided with the wedge shape fixture block (68) of movable ratchet (64) top to the engagement direction, the lozenges of described wedge shape fixture block is towards movable ratchet (64), is provided with in the auxiliary-handle seat (61) by auxiliary-handle handle (60) to drive wedge shape fixture block (68) hoisting mechanism of tractive upwards.

9. a kind of multifunctional grass mowing machine according to claim 8, it is characterized in that: described hoisting mechanism comprises that being located at auxiliary-handle seat (61) top rotates the fixed block (69) that rises with bull stick (62) end, described fixed block (69) connects described wedge shape fixture block (68) by a haul line (63), is provided with the spring (681) that the wedge shape fixture block is pushed up back original position between wedge shape fixture block (68) upper surface and auxiliary-handle seat (61) housing.

10. according to claim 1 or 2 or 3 described a kind of multifunctional grass mowing machines, it is characterized in that: also be provided with in the described deburring mechanism of beating the grass and change the beat the grass adjusting device of height of the deburring mechanism of beating the grass, described adjusting device comprises a pair of road wheel (31) of being located at deburring mechanism housing (30) the limit eaves of beating the grass, described road wheel (31) is connected by wheel pendulum (32) with the housing (30) of the deburring mechanism of beating the grass, wheel pendulum (32) upper end is connected with rotating shaft (33), rotating shaft (33) two ends are fixed with ratchet I (34), beat the grass corresponding wheel pendulum (32) junction on the housing of deburring mechanism be provided with rotating shaft (33) switching and with two ratchet II (35) of ratchet I elasticity pressurized engagement, the housing of deburring mechanism of beating the grass is provided with an eccentric rod (36), and the major axis end face of described eccentric rod (36) is pressed on the outer face of a ratchet II (35) wherein when ratchet I and ratchet II engagement.