CN201182104Y

CN201182104Y - Gardening cutting tool

Info

Publication number: CN201182104Y
Application number: CNU2008200349807U
Authority: CN
Inventors: 王亮; 孙云红
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2008-04-02
Filing date: 2008-04-02
Publication date: 2009-01-21
Anticipated expiration: 2018-04-02

Abstract

The utility model discloses a gardening cutting tool, comprising a mainframe shell, a motor and a gear case arranged inside the mainframe shell, a drive set arranged inside the gear case, and a replaceable cutter subassembly driven by the drive set. The cutter subassembly is composed of two cutters which reciprocate relatively; the drive set at least drives one cutter in one direction through a connecting device; the gear case further comprises a lower cover body on which a first opening is arranged for splicing the connecting device and the drive set. Since the drive set is encased inside the cavity of the gear case, the cutter subassembly can be more convenient and safer to replace.

Description

Gardening cutting tool

Technical field

The utility model relates to a kind of gardening cutting tool of replaceable cutter, especially a kind of trimmer that gear box structure is set.

Background technology

Usually, all be provided with the cutter that is used to prune plant on outdoor gardening class such as the trimmer cutting tool, this type of cutter is owing to be worn when cutting, need and safeguard from the main body dismounting, perhaps need repair and then need change with other multi-form cutter different plants in operating process; Trimmer can be changed with different cutters usually as required.

The patent of announcing No. 3959878 as United States Patent (USP) has disclosed a kind of electric tool that can change work package, it comprises host shell, be arranged at the drive unit of host shell, and the work package that is linked optionally with host shell, work package comprises two kinds of multi-form cutting tools, under need not situation, can in host shell, change with different cutting tools by any instrument; Each cutting tool all comprises a fixing bottom tool, and the activity by fixedly bottom tool support is fixed a cutting tool, when cutting tool is not connected in host shell, cause rare part actuator and expose to housing, when relevant position on bottom tool and the housing connects and positions, fixing a cutting tool is meshing with each other with actuator and is used for driving and fixes a cutting tool, and the size of bottom tool is arranged so that its actuator that will expose has carried out effective covering after connecting with host shell; In assembling process, the actuator that must earlier part be exposed be aimed at the interface sites on the movable cutter, fixing bottom tool could be docked and is fixed in host shell then, and actuator ability driven movable cutter carry out work.

International Patent Application Publication No. is the cutting tool that the specification of WO2006/050981 has disclosed a kind of replaceable cutter for another example, the toolbox of this cutting tool comprises a bottom tool, and reciprocating the fixing a cutting tool of relative bottom tool, the surface of fixing a cutting tool is provided with the waist connected in star; One eccentric connector is set on the driving wheel of cutting tool, and this eccentric connector is used for being meshed with the waist connected in star of fixing a cutting tool, and it is reciprocating to be used for driving the relative bottom tool of motion of fixing a cutting tool.Be provided with elastic component between eccentric connector and the driving wheel, when toolbox connects and is fixed in cutting tool, eccentric connector is subjected to the active force of pushing of cutter, elastic component produces strain, make elastic component relative drive shaft on contrary engagement direction produce axial displacement, open the power switch of cutting tool as the operator, driving wheel drives eccentric connector and is rotated, when eccentric connector rotates to when being meshed the position with the waist connected in star of fixing a cutting tool, elastic component recovers distortion, fixing a cutting tool driven by the engagement of eccentric connector, thereby bottom tool does relatively reciprocating motion relatively; Because the cutter of this cutting tool does not need in advance eccentric connector to be aimed at the waist connected in star in assembling process, therefore claim this cutter assembling to be called the blind dress of cutter.

The toolbox of mentioning in the case before above-mentioned is in the replacing process, its drive unit is all directly being exposed to the outside, in assembling process, if operator's start-up operation switch unconsciously, drive unit promptly can turn round at a high speed, is not had the operator of psychological preparation to bring unsafe factor; Simultaneously, because drive unit is not isolated with cutter effectively, make that foreign material are easy to enter drive unit inside, and have added lubricating oil in the drive unit usually in the process of carrying out cut operation, will clear up after foreign material enter will be a trouble.

The utility model content

For overcoming the deficiencies in the prior art, the utility model provides a kind of cutting tool safe, convenient, that carry out the cutter installation and dismantle effectively.

The technical solution of the utility model is achieved in that a kind of gardening cutting tool, comprise host shell, be arranged at the motor in the host shell, gear-box, and be arranged at drive unit in the gear-box, removable toolbox by the drive unit driving, described toolbox comprises two reciprocating relatively cutters, described drive unit drives a cutter at least by jockey on a driving direction, described gear-box further comprises a lower cover, and described lower cover is provided with first opening that supplies jockey and drive unit to connect.Described jockey comprises and is fixedly set in first connector that drives cutter, and with second connector of first connector engagement, described second connector removably is coupled to drive unit.Described lower cover also comprises one second opening.Described drive unit comprises the pinion that is fixedly set in motor drive shaft, and duplicate gear, gear wheel, and described duplicate gear is provided with fixed axis, and described gear wheel is provided with fixed axis.Described fixed axis is arranged in second opening, and described fixed axis is arranged in first opening.The cutter that described work does relatively reciprocating motion comprises fixes a cutting tool and bottom tool, and first connector is to be fixedly set in collecting company's fitting of fixing a cutting tool.Described second connector is an eccentric connector, and described collecting company fitting is a waist shape collar, and described eccentric connector is provided with the cam part and the through hole of engaging piece and the engagement of waist shape collar.Described engaging piece comprises a plurality of teeth, and described tooth is provided with the guide ramp of inclination.Described gear wheel is provided with engaging piece, and described engaging piece comprises a plurality of teeth, and described tooth is provided with the guide ramp of inclination.Described eccentric connector through hole and gear wheel fixed axis are matched, and the tooth of described eccentric connector and the tooth of gear wheel can be selected engagement.

In sum, the utility model has the advantages that: handling safety when toolbox is installed, convenient, fast, and be connected and fixed reliable.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the schematic perspective view that the utility model trimmer is removed partial shell.

Fig. 2 is the utility model trimmer master apparent direction cutaway view.

Fig. 3 is the core section amplification view after the utility model trimmer is removed host shell.

Fig. 4 is the core section three-dimensional exploded view after the utility model trimmer is removed host shell.

Fig. 5 be according to Fig. 2 along A-A direction cutaway view, this moment cutter not matched with host shell.

Fig. 6 be according to Fig. 2 along A-A direction cutaway view, this moment, cutter and host shell were matched.

Fig. 7 is the structural representation of second kind of toolbox of the utility model trimmer.

Wherein:

1-trimmer 11-motor drive shaft 19-tooth 29b-buckle

2-host shell 12-pinion 20-Connection Element 30-tooth

3-operating grip 13-duplicate gear 21-fixed axis 30a-guide ramp

The 4-working head 13a-gear wheel 22-of portion trip bolt 31-fixed axis

5-motor 13b-pinion part 23-through hole 32-elastic component

6-toolbox 14-gear wheel 24-kidney slot 33-toolbox

The 6a-15-opening 25-translot 33a-that fixes a cutting tool fixes a cutting tool

6b-bottom tool 16-opening 26-pad 33b-bottom tool

Long-armed 34-securing member of 7-rotating dog 17-annular housing 26a-

The 8-waist shape collar 17a-ring set 26b-galianconism 35-of portion notch

8a-flange 17b-annular engaging piece 27-opening 36-waist shape collar

9-steady pin 18-eccentric connector 28-fastener 37-eccentric connector

9a-opening 18a-cam part 28a-press section 37a-cam part

The 10-drive unit 18b-engaging piece 28b-hook 37b-of portion engaging piece

10a-gear-box 18c-neck 29-cover plate 38-tooth

10b-gear box cover 18d-flange part 29a-support member 38a-guide ramp

Embodiment

The utility model has come out with a kind of gardening cutting tool of replaceable cutter, now describes with specific embodiment.

With reference to Fig. 1, shown in Figure 2, trimmer has a tool body 1, comprises host shell 2, is arranged on the host shell 2 and Xiang Yiduan extends the operating grip 3 that is used to grip, and is arranged at the working head 4 of host shell 1 other end; Wherein be provided with motor 5 and drive unit 10 in the host shell 2, be provided with toolbox 6 in the working head 4, toolbox 6 one ends are connected in the working head 4, the other end is to extending working head 4 away from the direction of operating grip 3, working head 4 is provided with cover plate 29 and is used for part toolbox 6 has been carried out covering effectively, when motor 5 is activated, its rotation is passed to toolbox 6 by drive unit 10 and Connection Element 20, wherein toolbox comprises fix a cutting tool 6a and bottom tool 6b, fixing a cutting tool is connected by rotating dog 7 between 6a and the bottom tool 6b, and the end that fix a cutting tool 6a and bottom tool 6b extend working head 4 is provided with a plurality of cutting teeths respectively.

With reference to Fig. 3, shown in Figure 4, the 6a that fixes a cutting tool goes up the other end with respect to cutting teeth, fixedly installed collecting company's fitting 8, the collar that this collecting company's fitting is made into waist shape is fixed in the 6a that fixes a cutting tool, corresponding to the center position of waist shape collar 8, bottom tool 6b is provided with the steady pin 9 that opening 27 and has opening 9a, and steady pin 9 forms a protuberance on opening 9a upper surface; Drive unit 10 comprises the pinion 12 that is arranged in the gear-box 10a, duplicate gear 13 and gear wheel 14, wherein pinion 12 fixedly is coupled to the end of motor drive shaft 11, duplicate gear 13 is an intermediate drive gear with large and

small gear part

13a, 13b around fixed axis 21 rotations, the 13a of its gear wheel portion is meshed with pinion 12, pinion part 13b and gear wheel 14 mesh, thereby can be passed to gear wheel 14 by intermediate drive gear 13 from effect ground with the rotation of motor shaft 11, gear wheel 14 is rotated around fixed axis 31; Gear-box 10a is provided with gear box cover 10b, gear box cover 10b is fixedlyed connected with gear-box 10a by trip bolt 22, the cavity that gear-box 10 is arranged to seal, prevent that foreign material from entering gear-box 10a in the time of can or cutting grass at the finishing branches and leaves, be provided with respectively on the gear box cover 10b for fixed

axis

21,31 openings that wear 15,16, the diameter of opening 16 ratio opens 15 want big, and the end of

fixed axis

21,31 extends certain length respectively from opening 15,16.The lower end of gear wheel 14 is provided with an annular housing 17, has ring set 17a integrally formed with gear wheel 14 or that fixedly connected in the annular housing 17, this ring set 17a and gear wheel 14 coaxial settings, be provided with the engaging piece 17b that is fixed in gear wheel 14 bottoms between ring set 17a and the fixed axis 31, this engaging piece is a ring gear portion, it includes the tooth 19 that a plurality of edges circumferentially evenly are provided with, and a side of each tooth 19 all is arranged to have the guide ramp (not shown) at angle of inclination; The diameter setting of opening 16 is slightly larger than the annular engaging piece 17b of big gearing part 14.

With further reference to shown in Figure 4, eccentric connector 18 comprises cam part 18a and engaging piece 18b, be connected by neck 18c between cam part 18a and the engaging piece 18b, wherein eccentric connector 18 longitudinally is provided with and holds the through hole 23 that fixed axis 31 wears, engaging piece 18b comprises the tooth 30 that a plurality of edges are circumferentially evenly arranged, each tooth 30 also has the guide ramp 30a of inclination, and the position that is provided with of the sloping 30a of this guiding is provided with just in time relative with the guide ramp 19a position of tooth 19, it is the right side of guide ramp 19a position tooth 19, guide ramp 30 then is positioned at the left side of tooth 30, the quantity of tooth and pitch arrangement also are to mate mutually, connect to such an extent as to the engaging piece 17b of the engaging piece 18b of eccentric connector 18 and gear wheel 14 bottoms selectively meshes; The peripheral surface of cam part 18a bottom is extended the outstanding one circular arc flange part 18d greater than 180 degree downwards.The translot 25 that the 6a that fixes a cutting tool of toolbox 6 offers a kidney slot 24 and connects with kidney slot 24, the end of translot 25 is provided with will fix a cutting tool 6a and bottom tool 6b of a rotating dog 7 and connects, and rotating dog 7 is simultaneously as the counterrotating pivotal axis of upper and lower cutter; Waist shape collar 8 fixedly is coupled in the kidney slot 24, and the lower end of waist shape collar 8 has extended beyond kidney slot 24, two side bottoms of waist shape collar 8 are provided with l shaped gasket 26 (only showing a pad among the figure) respectively, long-armed 26a of l shaped gasket 26 is supported in the 6a bottom of fixing a cutting tool, the 26b of galianconism portion of l shaped gasket 26 extends upward, respectively with the 6a both sides of the edge clamping of fixing a cutting tool, thereby effectively with waist shape collar 8 with fix a cutting tool 6a kidney slot 24 close-fittings together, a friction shim 26 is provided between 6a and the bottom tool 6b for fixing a cutting tool simultaneously; When the 6a that fixes a cutting tool is the relative bottom tool 6b of pivot when moving back and forth with rotating dog 7, will fix a cutting tool 6a and bottom tool 6b of long-armed 26a of l shaped gasket 26 separates, thereby avoids or reduced friction between the upper and lower cutter; Waist shape collar 8 upper surfaces are provided with the flange 8a that a circle stretches to the inside.

With reference to Fig. 3, shown in Figure 5, in the time of in toolbox 6 is connected in trimmer working head 4, the end that fixed axis 21 extends gear-box gear box cover 10b is meshed with the opening 27 of bottom tool 6b, the gear part 18b of eccentric connector 18 and the 17b of ring gear portion are connected with a joggle, this moment, the end of extending opening 16 of fixed axis 31 entered among the opening 9a of steady pin 9 after passing the through hole 23 of eccentric connector 18, the cam part 18a of eccentric connector 18 is located in the waist shape collar 8, and the circular arc flange part 18d of cam part 18a bottom just in time is matched with the top of steady pin 9, fixed axis 31 is as the rotating shaft of eccentric connector 18, when eccentric connector 18 rotations, the top surface edge of cam part 18a is owing to being subjected to the restriction of flange 8a thereby can not jumping out from waist shape collar 8; Toolbox 6 is arranged in the working head 4, and its position is fixed by the bottom cover plate 29 by trimmer; When the motor 5 that starts trimmer carries out work, the rotation of motor shaft 11 is passed to duplicate gear 13 by pinion 12, be passed to gear wheel 14 by duplicate gear 13 again, the rotation of the rotating band rotating ring generating gear 17b of portion of gear wheel 14, because the gear part 18b of 17b of ring gear portion and eccentric connector 18 is connected with a joggle, thereby drive the rotation of eccentric connector 18, the cam part 18a of eccentric connector 18 eccentric rotation of relative fixed axle 31 dos in the waist shape collar 8 of the 6a that fixes a cutting tool at this moment is moving, thereby the feasible 6a that fixes a cutting tool is that the relative bottom tool 6a of rotating shaft is reciprocating with rotating dog 7.

With reference to Fig. 5, shown in Figure 6, the head shell both sides of trimmer working head 4 are respectively arranged with fastener 28, fastener 28 comprises press section 28a and the 28b of hook portion, wherein between press section 28a and the head shell 4 elastic component 32 is set, the buckle 29b that bottom cover plate 29 is provided with support member 29a and is connected with a joggle with the 28b of hook portion, when cover plate 29 is connected in body shell 2, buckle 29b and the 28b of hook portion engagement, the bottom surface of the support member 29a roof pressure bottom tool 6b of cover plate 29 is connected in the working head 4 thereby effectively toolbox 6 is fixed in.When needs are changed cutter, the operator only need pin press section 28a makes fastener 28 overcome the elastic force of elastic component 32 to head shell 4 generations one axial displacement, thereby make 28b of hook portion and buckle 29b throw off mutually, the operator just can take off cover plate 29 on the housing 4 easily from the head.The operator can be with toolbox 6 together with eccentric connector 18 from fixed axis 21, disassemble on 31, this moment, the gear part 18b of ring gear 17b of portion and eccentric connector 18 threw off mutually, changed again with new cutter or other to can be used for repairing the cutter of multi-form plant again.

Usually, toolbox 6 just fits together during fabrication with eccentric connector 18, and eccentric connector 18 is not easy to escape or lost from toolbox 6 when changing cutter like this; And circular arc flange part 18d contains with steady pin 9 upper surface protuberances and cooperates, and makes the through hole 23 of eccentric connector 18 guarantee aligned condition all the time with steady pin opening 9a, and promptly the position of the pivot of eccentric connector 18 is fixed; Certainly, be equipped with eccentric connector on the toolbox of other type to be replaced equally, this eccentric connector can be made into standard component to increase versatility, and cost can be relatively low like this.

With reference to shown in Figure 7, it is the toolbox 33 that another kind is used to repair branches and leaves, this toolbox 33 comprises along reciprocating relatively 33a of fixing a cutting tool of longitudinally and bottom tool 33b, its longitudinally of 33a and bottom tool 33b upper edge of fixing a cutting tool extends both sides and is equipped with a plurality of sawtooth respectively, and the kidney slot mouth 35 by securing member 34 and vertically setting between the upper and lower cutter flexibly connects; The 33a that wherein fixes a cutting tool is provided with waist shape collar 36, and the structure setting of this waist shape collar 36 is identical with the waist shape collar 8 of the 6a that fixes a cutting tool, and just the setting of waist shape collar 36 on the 33a that fixes a cutting tool becomes 90 degree with waist shape collar 8 in the direction that is provided with of the 6a that fixes a cutting tool.Wherein eccentric connector 37 is standard components, and is therefore identical with the structure of eccentric connector 18, repeats no more herein.The cam part 37a of eccentric connector 37 is engaged in the waist shape collar 36, when needs are installed on trimmer with toolbox 33, only need axially relative along fixed axis 31 with the annular engaging piece 17b of gear wheel with the engaging piece 37b on the eccentric connector 37, this moment, fixed axis 31 was as a lead, the operator only needs the through hole of eccentric connector 37 is sheathed on the fixed axis 31, just can be easily that the engaging piece 37b of eccentric connector 37 is passed opening 16 is relative with the annular engaging piece 17b of gear wheel 14; Because engaging piece 37b is provided with a plurality of teeth 38 equally, each tooth 38 is equipped with the guide ramp 38a at angle of inclination, therefore, in case engaging piece 37b is contacted with annular engaging piece 17b, tooth 19 contacts with 38 guide ramp 19a with tooth 19 of guide ramp 38a, tooth of tooth 38, the operator only needs slightly firmly toolbox 33 upwards one to be pushed up, annular engaging piece 17b just can turn over a respective angles around fixed axis 31 under this active force, tooth 38 enters the state that is meshed with tooth 19 automatically along guide ramp 19a.

Such structure setting, make the alignment function that in the whole replacing process of toolbox, has saved eccentric connector and waist shape collar, as long as and the toolbox that will have eccentric connector is assemblied on the transmission connection piece, just can easily and fast cutter be in place; And the engagement between tooth and the tooth makes and drives and is connected very stable and effective.By cover plate 29 or other device this link position of toolbox is fixed again; The setting of gear box cover 10b simultaneously, the drive unit that makes 10 is packed to be had in the gear-box 10a cavity, in a single day switch is not operated the person and unconsciously triggers when cutter is installed, and motor 5 and drive unit 10 high speed rotating can not injure the operator yet, so cutter is quite safe when changing; Even when cut operation, there are foreign material to enter in the head shell, also easy cleaning and maintenance when changing cutter.

Claims

1. gardening cutting tool, comprise host shell (2), be arranged at the motor (5) in the host shell, gear-box (10a), and be arranged at drive unit (10) in the gear-box, removable toolbox (6 by the drive unit driving, 3 3), described toolbox comprises two reciprocating relatively cutter (6a, 6b, 33a, 33b), described drive unit drives a cutter (6a at least by jockey (20) on a driving direction, 33a,), it is characterized in that: described gear-box further comprises a lower cover (10b), described lower cover is provided with first opening (16) that supplies jockey and drive unit to connect.

2. gardening cutting tool according to claim 1, it is characterized in that: described jockey comprises and is fixedly set in first connector (8,36) that drives cutter, and with second connector (18 of first connector engagement, 37), described second connector removably is coupled to drive unit.

3. gardening cutting tool according to claim 2 is characterized in that: described lower cover also comprises one second opening (15).

4. gardening cutting tool according to claim 3, it is characterized in that: described drive unit comprises the pinion (12) that is fixedly set in motor drive shaft (11), and duplicate gear (13), gear wheel (14), described duplicate gear is provided with fixed axis (21), and described gear wheel is provided with fixed axis (31).

5. gardening cutting tool according to claim 4 is characterized in that: described fixed axis (21) is arranged in second opening (15), and described fixed axis (31) is arranged in first opening (16).

6. gardening cutting tool according to claim 5 is characterized in that: the cutter that described work does relatively reciprocating motion comprise and fixing a cutting tool (6a, 6b) and bottom tool (33a, 33b), first connector is to be fixedly set in collecting company's fitting (8,36) of fixing a cutting tool.

7. gardening cutting tool according to claim 6, it is characterized in that: described second connector is an eccentric connector (18,37), described collecting company fitting is a waist shape collar, described eccentric connector is provided with engaging piece (18b, 37b) with the cam part of waist shape collar engagement (18a, 37a) and through hole (23).

8. gardening cutting tool according to claim 7 is characterized in that: described engaging piece (18b 37b) comprises a plurality of teeth (30,38), described tooth be provided with inclination guide ramp (30a, 38a).

9. gardening cutting tool according to claim 8 is characterized in that: described gear wheel is provided with engaging piece (17b), and described engaging piece comprises a plurality of teeth (19), and described tooth is provided with the guide ramp of inclination.

10. gardening cutting tool according to claim 9 is characterized in that: described eccentric connector through hole (23) is matched with gear wheel fixed axis (31), and the tooth of described eccentric connector (30,38) can be selected engagement with the tooth (19) of gear wheel.