CN101965771B

CN101965771B - Lawn mower

Info

Publication number: CN101965771B
Application number: CN2010102610329A
Authority: CN
Inventors: 许海深; 聂方杰; 王向东
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2010-08-24
Filing date: 2010-08-24
Publication date: 2012-01-25
Anticipated expiration: 2030-08-24
Also published as: CN101965771A

Abstract

The invention discloses a lawn mower, belonging to a lawn mower cutting device. The lawn mower comprises a rotating speed output shaft, a cutter blade, a quick clamp, a restoring device and at least two engaging elements, wherein the quick clamp is suitably used for clamping the cutter blade o the output shaft and comprises a shaft sleeve and a pressure head which are suitably installed on the output shaft and are respectively located on both sides of the cutter blade, one end of the shaft sleeve toward the inner side face of the cutter blade is provided with a round table shaped groove, the pressure head comprises a ring body capable of penetrating through a cutter blade installing hole from the outer side face of the cutter blade and stretching into the round table shaped groove, and a first tooth-shaped part is located on the outer circumferential face of the ring body; the restoring device is arranged to apply a restoring force to the shaft sleeve to face toward the inner side face of the cutter blade; and the two engaging elements are connected with the output shaft and can move along the direction perpendicular to the axial direction of the output shaft, each engaging element is provided with an outer surface and an inner surface, a second tooth-shaped part is located on the inner surface of the engaging element and is engaged with a first tooth-shaped part. The lawn mower has the advantages of simple structure, convenient disassembly and assembly, small operating force, easy and quick cutter blade disassembly and assembly by hand and reliable cutter clamping.

Description

Mower

Technical field

The present invention relates to a kind of mower, relate in particular to a kind of correlation technique of installation of mower blade.

Background technology

Fixed form by motor-operated mowing blade in present mower power and the executive system all is to use thread part to press-fit; Blade is fixedly clamped on motor output shaft by last location-plate, following location-plate; At last at the terminal nut of installing of output shaft; Rely on nut with the blade fixation, nut is the vital part of fixed blade.Blade is difficult for loosening when working in order to ensure mower; In blade fixedly the time; Usually all by instruments such as spanners with fixing very fastening of nut; So just cause when breaking down or need safeguard mower, replacing blade, just very difficult for operating personnel's dismounting blade that strength is big inadequately, must screw nut ability removal of inserts by aids such as spanners; If strength control is bad as firmly too big or too quicklyly be easy to cause the user injured when the dismounting blade, makes troubles even injure to the operator.Utility model patent ZL200620106980.4 discloses a kind of Lawn mower blade fastening bolt; Only the wearability of bolt is improved; The fixed form of mower blade still adopts the fixing mode of screw thread, does not fundamentally solve the not easy-to-dismount problem of mower blade.

Summary of the invention

Technical problem to be solved by this invention provides a kind of mower blade that does not need to accomplish the dismounting of mower blade by instrument and presss from both sides soon; Only with hand is dismounting blade quickly and easily just, and action required power is little, and reliable clamping blade; Simple in structure, easy accessibility.

For solving the problems of the technologies described above, the technical scheme that the present invention adopts is a kind of mower, comprises: a rotating speed output shaft; One blade has a medial surface and a lateral surface and has an installing hole; One is suitable for blade is clamped in the fast folder on the output shaft; Fast folder comprises: be suitable for being contained on the output shaft and lay respectively at the axle sleeve and the pressure head of blade both sides; Be provided with round table-like groove at axle sleeve towards an end of blade medial surface; Pressure head comprises one and can pass the blade installing hole and stretch into the torus of round table-like groove from the blade lateral surface, and first parts of tooth is positioned on the toric outer peripheral face; One is set to axle sleeve and applies the return mechanism towards the restoring force of blade medial surface; At least two joggle pieces; It is connected in output shaft also can be along moving perpendicular to the axial direction of output shaft; Joggle piece has the outer surface that is suitable for contacting with the inner peripheral surface of round table-like groove and towards the inner surface of output shaft, and second parts of tooth is positioned on the inner surface of joggle piece and is suitable for meshing with first parts of tooth.

Structure of the present invention need not by any aid, and only with hand is dismounting blade quickly and easily just, and action required power is little, and reliable clamping blade, and is simple in structure, easy accessibility.

Description of drawings

Sketch map when Fig. 1 is the not charged cover of mower.

Fig. 2 is the explosive view of the fast clamping structure of the fast a kind of first-selected embodiment that presss from both sides of mower blade of the present invention.

Fig. 3 is the structural representation of the fast folder of mower blade among Fig. 2.

Fig. 4 is an A portion enlarged drawing among Fig. 3.

Among the figure, 1, motor; 2, motor output shaft; 2-1, through hole; 3, axle sleeve; 3-1, round table-like groove; 3-2, through hole or groove; 3-3, platen; 4, joggle piece; 4-1, tooth-shape structure; 4-2, through hole; 5, blade; 5-1, locating hole; 6, spring; 7, pin; 8, pressure head; 8-1, handheld terminal; 8-2, torus; 8-3, tooth-shape structure; 8-4, dop; 9, movement clearance; 10, go up cutting ferrule;

Embodiment

Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.

Shown in for example is a kind of sketch map of common mower like Fig. 1.As shown in Figure 2, the cutter sweep of mower comprises the mowing blade 5 that motor 1 is connected with axle head as the motor output shaft 2 of mower rotating speed output shaft usually, thereby the rotation of driven by motor mowing blade is mowed.Common mower is except directly being contained in blade on the motor output shaft as shown in Figure 2; Rotating speed that transmission device changes motor output can also be set to obtain suitable rotating speed of flail between motor output shaft and blade; Wherein blade is installed on the output shaft of transmission device, and this moment, the output shaft of transmission device was the mower rotating speed output shaft.Common mower also possibly be other forms of power drive except motor-driven.

The fast folder of the blade of mower of the present invention is applicable to the mower that various employing rotating blades cut, to be used for that blade is fixed in the rotating speed output shaft that rotates around axis.

As Fig. 2, Fig. 3, shown in Figure 4 be the fast clamping structure of a kind of first-selected embodiment of the fast folder of mower blade of the present invention; And be example to be contained on the motor output shaft; Wherein Fig. 3 and 4 shows fast clamping structure blade is fixed on the state on the output shaft, and Fig. 2 shows the explosive view of fast folder and blade.

Press from both sides the position relation of each several part when the clamping blade for clear description is fast, at first be in the clamp position that blade is clamped on the output shaft below fast folder is described with fast folder.In this first-selection embodiment, fast folder comprises the axle sleeve 3 and pressure head 8 that is sleeved on the motor output shaft 2 and lays respectively at blade 5 both sides, and this output shaft has an axis.

Pressure head 8 is positioned at blade 5 that side near the end of output shaft 2, i.e. the blade outside.The handheld terminal 8-1 that pressure head 8 is operated away from an end of blade for the convenience of the user.Pressure head 8 passes the installing hole on the blade and comprises the first-selected circumferential continuous torus 8-2 that is near the other end of blade; At the first parts of tooth 8-3 of all or part of outer peripheral face of torus 8-2 upper edge axial distribution, this first parts of tooth comprises at least one tooth.In other embodiments, also can adopt around axial circumferential discontinuous torus structure.In order to aim at the position of pressure head 8 and output shaft more easily, pressure head 8 has one and is suitable for being enclosed within the hole of exporting axle head.

Axle sleeve 3 is positioned at blade that side away from the end of output shaft 2, and promptly blade is inboard.Axle sleeve 3 is provided with round table-like groove 3-1 vertically near an end of blade.This round table-like groove 3-1 has the bigger opening of a radius towards blade, and has an inner peripheral surface and have a gradient, i.e. axial slope vertically.Between the torus 8-2 of round table-like groove 3-1 and pressure head, be provided with two joggle pieces 4; Joggle piece 4 cooperates with the inner peripheral surface of said round table-like groove 3-1 towards the outer surface of the round table-like groove 3-1 inner peripheral surface of axle sleeve movably, and has the axial slope with the axial slope basically identical of the inner peripheral surface of round table-like groove 3-1.Joggle piece 4 is provided with the suitable second parts of tooth 4-1 that cooperates with the tooth of said pressure head torus 8-2 outer peripheral face towards the inner surface of the torus 8-2 of pressure head, and this second parts of tooth comprises at least one tooth.Under the clamp position of fast folder, there is meshing relation between first parts of tooth and second parts of tooth.Also be provided with radial direction through hole 4-2 at joggle piece 4 (promptly radially) perpendicular to axial direction; One end of one pin 7 is contained among the through hole 4-2; Also be provided with a through hole 2-1 on the motor output shaft 2, pin 7 mid portion passes through hole 2-1, this through hole 4-2 on the direction of the size axial along output shaft 2 greater than the diameter of pin 7; Thereby permission joggle piece 4 can be mobile within the specific limits along axially, and allow joggle piece 4 perpendicular to axial directionly to move.In other embodiments, the connection between two joggle pieces and the output shaft can also connect through two independent pins, and perhaps pin directly is formed on one of joggle piece and output shaft, can certainly be through connection joggle piece of the connected mode beyond the pin and output shaft.One return mechanism is set to axle sleeve 3 and applies restoring force so that it is pressed to blade; Thereby the inner peripheral surface of the round table-like groove of axle sleeve 3 is exerted pressure to joggle piece, make it have trend that the axis towards output shaft moves so that toric first parts of tooth of second parts of tooth of joggle piece and pressure head 8 is meshed and does not get loose.In this embodiment, this return mechanism is specially a spring 6, spring 6 be enclosed on the output shaft and one with respect to output shaft 2 axial restraints between cutting ferrule 10 and the axle sleeve other end outside, and be in compressive state, thereby apply elastic pressure to axle sleeve.In other embodiments, return mechanism also can be specially appropriate device or the element of other types and/or install to apply restoring force to axle sleeve with other suitable manner.

In order in the blade rotary course, to limit the circumferential position of blade better with respect to output shaft; Pressure head handheld terminal 8-1 also is provided with at least one protruding dop 8-4 first-selectedly on the contact-making surface of blade 5; Installing hole week upwards is provided with at least one the locating hole 5-1 that matches with dop in the blade upper edge, and first-selected ground is located at dop 8-4 position outside joggle piece 4 range of movement.Handheld terminal 8-1 outer surface first-selection is circular-arc for ease of what hand.

Axle sleeve 3 other ends are provided with the platen 3-3 of being convenient to operate, platen 3-3 external diameter greater than the external diameter of an above-mentioned end of axle sleeve 3 so that the user push with hand.

The round table-like groove 3-1 of axle sleeve 3 is towards the radius of the bigger opening of the radius of the blade maximum radius greater than the outer surface of joggle piece 4; Make end face at an end of the clamp position Lower shaft sleeve 3 of fast folder protrude in joggle piece 4 vertically and be pressed on the blade medial surface, and between joggle piece 4 and blade medial surface, form an axial movement clearance 9.In other embodiments, if between blade and axle sleeve, be provided with pad, the end face of an end of axle sleeve also can be pressed on the pad.

Lucid and lively furtherly below folder is transformed into the course of work of releasing orientation from clamp position.When the user pushes axle sleeve 3 with a hand on away from the direction of blade medial surface; The elasticity that axle sleeve 3 overcomes spring 6 moves away from the direction of blade medial surface along axial court; Cause the inner peripheral surface of the round table-like groove of axle sleeve 3 no longer to be exerted pressure to joggle piece 4; And along with axle sleeve 3 gap occurs between the outer surface of inner peripheral surface and the joggle piece 4 of the round table-like groove of blade medial surface further away from each other; The handheld terminal 8-1 that this moment, the user another held pressure head 8 rocks gently; Thereby 4 of joggle pieces can be perpendicular to axial direction move second parts of tooth that makes joggle piece 4 and first parts of tooth of pressure head 8 breaks away from engagement to the direction away from axis, the removable pressure head of user then, and just can take off blade this moment.

To blade be clamped on the output shaft; Overcome spring pressure earlier and push axle sleeve; Blade is placed on the end face of axle sleeve one end; The torus of pressure head is passed dop that the blade installing hole makes pressure head simultaneously to be aimed at the locating hole of blade and torus is inserted between the joggle piece can't continue to insert until pressure head then; Unclamp axle sleeve and make round table-like groove inwardly press second mate of joggle piece to make toric first parts of tooth engagement of itself and pressure head, because axle sleeve is also exerted pressure to the blade medial surface with respect to joggle piece, make pressure head simultaneously by extruding outwardly; Thereby further strengthened the engagement between first parts of tooth and second parts of tooth, blade has been clamped on the output shaft securely.

For those of ordinary skill in the art, can be readily appreciated that in other embodiments, joggle piece is not limited only to two, can also be three or more, along direction setting perpendicular to axial direction.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and distortion, these improvement and distortion also should be regarded as protection scope of the present invention.

Claims

1. mower comprises:

One rotating speed output shaft;

One blade has a medial surface and a lateral surface and has an installing hole;

It is characterized in that said mower also comprises one and is suitable for blade is clamped in the fast folder on the said output shaft, said fast folder comprises:

Be suitable for being contained on the said output shaft and lay respectively at the axle sleeve and the pressure head of blade both sides; Be provided with round table-like groove at said axle sleeve towards an end of blade medial surface; Said pressure head comprises one and can pass the blade installing hole and stretch into the torus of round table-like groove from the blade lateral surface, and first parts of tooth is positioned on the said toric outer peripheral face;

One is set to axle sleeve and applies the return mechanism towards the restoring force of blade medial surface;

At least two joggle pieces; It is connected in said output shaft also can be along moving perpendicular to the axial direction of said output shaft; Said joggle piece has the outer surface that is suitable for contacting with the inner peripheral surface of said round table-like groove and towards the inner surface of said output shaft, and second parts of tooth is positioned on the inner surface of said joggle piece and is suitable for and the engagement of said first parts of tooth.

2. mower as claimed in claim 1 is characterized in that, said round table-like groove is towards the radius of the maximum open of the blade medial surface maximum radius greater than said joggle piece outer surface.

3. mower as claimed in claim 1 is characterized in that, said pressure head comprises one and is positioned at handheld terminal said blade lateral surface, that be suitable for operating.

4. mower as claimed in claim 1 is characterized in that, the other end of said axle sleeve is provided with one and is suitable for manual platen.

5. mower as claimed in claim 1 is characterized in that, said torus is circumferential continuous structure.

6. mower as claimed in claim 1 is characterized in that, said joggle piece is connected in said output shaft movably on the axial direction of said output shaft.

7. mower as claimed in claim 1 is characterized in that, said return mechanism is a spring.

8. like each described mower of claim 1-7, it is characterized in that said first and second parts of tooth all comprise at least one tooth.

9. mower as claimed in claim 8 is characterized in that said blade upwards has at least one locating hole in installing hole week, and said pressure head comprises the dop that is suitable for at least one cooperation of said locating hole.

10. mower as claimed in claim 8 is characterized in that, the power source of said mower is a motor.

11. mower as claimed in claim 10 is characterized in that, said rotating speed output shaft is a motor output shaft.

12. mower as claimed in claim 8 is characterized in that, said mower comprises a power source and a transmission device, and said rotating speed output shaft is the output shaft of this transmission device.