CN201092068Y

CN201092068Y - Electric chain saw

Info

Publication number: CN201092068Y
Application number: CNU2007201761857U
Authority: CN
Inventors: 卢云峰; 邵灵敏
Original assignee: Individual
Current assignee: ZHEJIANG SAFUN INDUSTRIAL Co Ltd
Priority date: 2007-09-06
Filing date: 2007-09-06
Publication date: 2008-07-30
Anticipated expiration: 2017-09-06

Abstract

The utility model relates to an electric chain saw, comprising a shell and a motor; wherein, a braking baffle is arranged at one side of the front end of the shell; a handle is arranged at the rear end of the shell; a gearbox connected with and driven by the motor is arranged in the shell; the gearbox consists of an output shaft and a large gear arranged on the output shaft; a torsion spring is arranged between the large gear and the output shaft; one end of the torsion spring is fixedly connected and tightly matched with the output shaft, while the other end of the torsion spring, a free end, is matched with the large gear; a brake stop device is also arranged in the shell; the brake stop device consists of a switch button on the handle, a push rod which holds up the switch button and slides along with the movement of the switch button, a pushing block fixedly which is connected with the braking baffle and can slide back and forth, and a linkage block arranged between and linked with the push rod and the pushing block; a brake rod sliding up-and-down is arranged on the linkage block. When the brake rod is in a lower position, the lower end of the brake rod is matched with the upper free end of the torsion spring. The electric chain saw with the brake and stopper device has the advantages of safe use, simple and convenient operation and simple structure.

Description

A kind of electric chain saw

Technical field:

The utility model relates to a kind of hand-held chain saw, particularly a kind of electric chain saw.

Background technology:

Electric chain saw of the prior art includes casing, motor and by motor-driven and the saw chain bar that supported by guide plate.This saw chain bar can rotate at a high speed under the driving of motor, to realize cutting to trees, in working angles, the head of saw chain bar can be run into hard object (such as branch, tree knot, the artificial metal object that is provided with etc.) unavoidably, at this moment, the saw chain bar will make progress or backward towards operator recoil, serious threat operator's life security.

Therefore; people are for eliminating above-mentioned danger; invented multiple brake stop device; brake stop device as Chinese patent 200520073119.8 disclosed a kind of electric chain saws; comprise brake drive mechanism and clutch; wherein; clutch configuration mainly is made up of brake rim and brake ribbon; drive mechanism is mainly by lever element; connecting rod and spring are formed; and control degree of tightness between brake ribbon and the brake rim by the brake baffle plate of switch on the handle or casing front end; and then the work of control saw chain bar; running into the saw chain bar when the operator recoils, the operator can promote the brake baffle plate more forward in trip switch, and then the control brake ribbon packs tightly brake rim; the saw chain bar is quit work at short notice, so just can well protect operator's life security.But this structure also exists following deficiency:

The first, in this structure, clutch mainly is made up of brake rim and brake ribbon, its structure more complicated, brake rim and brake ribbon wear and tear easily in addition, cause easily skidding when packing tightly, causing can not snub, and the operator is brought danger, uses dangerous.

Second, when running into back attack phenomenon, the operator can be habitually with a hand grip handle, keep out with the another hand, and promote the brake block forward, but in this structure, need promote the brake baffle plate more forward after trip switch and could realize snub, this just makes the operator be difficult in critical moment realization snub; And the brake baffle plate in this structure is after being brought to a halt by preceding push-tight, when the switch quilt is closed once more, still can reset, and make the work of chain saw blade, like this, the operator just is easy to because of maloperation is injured, thereby this structure is operating difficulties and dangerous when snub.

The 3rd, in this structure, transmission component and brake assemblies are various, and complex structure, make starting switch require great effort very much when starting, and its installation, maintenance are got up also very difficult.

The utility model content:

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of safe in utilization, operation simple and convenient and electric chain saw simple in structure are provided.

A kind of electric chain saw that provides according to the utility model, comprise housing, motor, the gearbox that housing front end one side is provided with that brake baffle plate, rear end are provided with handle, inside is provided with and is in transmission connection with motor, gearbox comprises output shaft and the gear wheel that is installed on this output shaft, be provided with the button spring between gear wheel and the output shaft, this button spring one end and output shaft is affixed and tight fit with it, the other end be free end and with gear wheel movingly; Also be provided with the brake stop device in the described housing, this brake stop device comprises the shift knob be located on the handle, replace mutually with shift knob and the push rod that can slide with its action, with the brake baffle plate affixed and can before and after slip pushing block, be located between push rod and the pushing block and and form the interlock piece of interlock respectively with the two, one brake lever that can slide up and down is installed on the described interlock piece, this brake lever be in when the next its lower end can the button handsetting spring on free end, the button spring is unclamped and the cooperating of gear wheel.

According to a kind of electric chain saw that the utility model provides, also have following attached technical characterictic:

Described shift knob is hinged in the handle, its hinged end extension has a push arm, the upper end of this push arm and push rod one end are replaced, the push rod other end is provided with downward-sloping first inclined-plane and the horizontal plane from the terminal extension in this first inclined-plane, also is provided with the push rod back-moving spring between described push rod and the described housing.

Described interlock piece has first terminal and second end, be respectively equipped with the acclivitous first surface and second curved surface on the lower surface of two ends, also be provided with a downward slope on the upper surface of second end, this slope and second surface intersection, the upper surface of described pushing block inboard is provided with second inclined plane of matching with second curved surface; Described interlock piece middle part also is provided with a through hole.

Described brake lever can slide up and down and is installed in the through hole of interlock piece, it is positioned at interlock piece upper part one block is installed, be provided with a brake spring that is coated at brake lever between this block and the housing, the outer wall of brake lever lower end is provided with a groove that matches with free end on the button spring.

Described groove both sides are equipped with outward-dipping guiding surface.

Described push rod is provided with three cavitys along its length successively, and wherein, the projection on former and later two cavitys and the inner walls is slidingly matched, and is provided with described push rod back-moving spring in the middle cavity.

Described pushing block is fixed together by a straight pin with the brake baffle plate, and described housing is provided with the chute that slides for this straight pin.

In described handle and the described housing microswitch is installed all, the activation button on two microswitches second end with shift knob and interlock piece respectively is corresponding.

According to a kind of electric chain saw that the utility model provides, prior art has following advantage relatively:

First, clutch in this structure adopts the button spring structure, one end and output shaft are affixed, the other end is enclosed within on the gear wheel outward, during the gear wheel rotation, because the effect of frictional force makes the button spring screw and drive output shaft and rotates with gear wheel, the gear wheel rotary speed is fast more, the button spring cooperates tight more with gear wheel, during brake stop, free end on the button spring is kept out in the brake lever lower end, and the button spring is unclamped, can reach the purpose of brake stop easily, bad phenomenon such as there are not wearing and tearing in this clutch, skid, brake stop is rapid, uses as safe as a house.

Second: shift knob, brake baffle plate all can be controlled the brake stop device separately in this structure, when running into back attack phenomenon, only need to control one of them, just can allow the chain saw blade in the extremely short time, quit work, in addition, this structure is after adopting the stop of brake baffle plate, and before shift knob did not also unclamp, the brake baffle plate can not reset, eliminated the harm that faulty operation is brought to the operator, thereby it is very simple, convenient to operate, and as safe as a house.

The 3rd: the stop control structure adopts simple several connecting rods to be connected in this structure, and adopt button spring simple in structure as clutch, thereby its structure is greatly simplified, all very convenient when installing or keep in repair, shift knob also can be controlled this stop device very easily.

Description of drawings:

Introduce the utility model in detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the brake chocking construction schematic diagram of the utility model after shift knob unclamps;

Fig. 2 for the utility model with the brake structural representation of stop of brake baffle plate;

Fig. 3 is the local enlarged diagram at A place among Fig. 1;

Fig. 4 is the local enlarged diagram at B place among Fig. 2;

Fig. 5 is the structural representation of brake lever upper groove among the present invention.

The specific embodiment:

Referring to figs. 1 through Fig. 4, according to a kind of electric chain saw that the utility model provides, comprise housing 1, motor 2, the gearbox 5 that housing 1 front end one side is provided with that brake baffle plate 3, rear end are provided with handle 4, inside is provided with and is in transmission connection with motor 2.Gearbox 5 comprises output shaft 51 and the gear wheel 52 that is installed on this output shaft 51, and this gear wheel 52 is connected with motor 2 gears, to obtain power.Be provided with button spring 53 between gear wheel 52 and the output shaft 51, the external part and the output shaft 51 of these button spring 53 1 ends are affixed, and simultaneously, this end is enclosed within outward on the output shaft 51 and tight fit with it, and the external part of the other end is a free end, and should end with gear wheel 52 movingly.Gear wheel 52 can be installed on the output shaft 51 by axle sleeve, button spring 53 outer being enclosed within on the axle sleeve, when gear wheel 52 rotates, can drive output shaft by button spring 53 does to rotate synchronously, when external force is stirred on the button spring 53 free end, this button spring 53 can unclamp and the cooperating of axle sleeve, and then being rotationally connected synchronously between disconnection gear wheel 52 and the output shaft 51, simultaneously, button spring 53 self can not rotate under external force, and then the output shaft affixed with it 51 can not be rotated, and overcome output shaft 51 inertia and rotated, the saw chain bar was had to go to the toilet in the extremely short time stop.

As mentioned above, also be provided with the brake stop device in the housing 1, the brake stop device comprises the shift knob 6 be located on the handle 4, replace mutually with shift knob 6 and the push rod 8 that can slide with its action, and pushing block 7 that can front and back slip affixed with brake baffle plate 3, be located between push rod 8 and the pushing block 7 and with the two and form the interlock piece 9 of interlock respectively.Interlock piece 9 rides over respectively on push rod 8 and the pushing block 7 by two ends, interlock is equipped with the brake lever 10 that can slide up and down on the piece 9, one microswitch 11 all is installed in handle 4 and the housing 1, and the activation button on this microswitch 11 is second terminal 92 corresponding with shift knob 6 and interlock piece respectively.During normal braking stop, trip switch button 6, the microswitch 11 corresponding with it disconnects, move behind the push rod 8, interlock piece 9 loses support force and falls, brake lever 10 also fall thereupon and be in the next, free end on its lower end button handsetting spring 53, impel button spring 53 to unclamp and the cooperating of gear wheel 52, reach the purpose (referring to Fig. 1 and Fig. 3) of brake stop; When needs snub stop, promote brake baffle plate 3 forward, pushing block 7 moves forward thereupon, interlock piece 9 loses support force and falls, the microswitch corresponding with it 11 disconnects, brake lever 10 also fall thereupon and be in the next, free end on its lower end button handsetting spring 53, impel button spring 53 to unclamp and the cooperating of gear wheel 52, reach the purpose (referring to Fig. 2 and Fig. 4) of snub stop.

Shift knob 6 is hinged in the handle 4, and its hinged end extension has a push arm 61, and these push arm 61 upper ends and push rod 8 one ends are replaced, and push rod 8 other ends are provided with downward-sloping first inclined-plane 81 and the horizontal plane 82 from the terminal extension in this first inclined-plane.Push rod 8 is provided with three cavitys 84,85,86 along its length successively, and wherein, the projection 12 on former and later two cavitys 84,86 and housing 1 inwall is slidingly matched, and is provided with push rod back-moving spring 83 in the middle cavity 85.

As mentioned above, interlock piece 9 has on the lower surface of first terminal 91 and second end, 92, two ends and is respectively equipped with the acclivitous first surface 93 and second curved surface 94, and during normal braking stop, first surface 93 cooperates with push rod upper horizontal plane 82.Also be provided with a downward slope 95 on the upper surface at second terminal 92 places, this slope 95 and second curved surface 94 intersect, after snub stop, before shift knob 6 does not unclamp, this intersection and pushing block 7 inner faces are replaced, and brake baffle plate 3 can not be resetted, only after shift knob 6 unclamps, brake baffle plate 3 just can reset, and has effectively eliminated the harm that faulty operation is brought to the operator after snub stop.

Pushing block 7 inner top side faces are provided with second inclined plane 71 of matching with second curved surface 94, interlock piece 9 middle parts also are provided with a through hole 98, brake lever 10 can slide up and down and is installed in the through hole 98 of interlock on the piece 9, it is positioned at interlock piece 9 upper parts one block 101 is installed, this block is replaced with interlock piece 9 upper surfaces when interlock moves on the piece 9, makes the brake lever 10 can be with moving on the interlock piece 9.Also be provided with the brake spring 102 that is coated at brake lever 10 between block 101 and the housing 1, force brake lever 10 to move down when brake stop, the outer wall of brake lever 10 lower ends is provided with a groove 103 that matches with free end on the button spring 53.During startup, after the baffle plate 3 of guaranteeing to brake resets, press shift knob 6, this shift knob 6 turns clockwise around itself and housing hinged place, because push rod 8 is slidably mounted in the housing 1, push arm 61 can promote push rod 8 forward very easily, and push rod 8 is at compression push rod back-moving spring 83 in the process of front slide, at this moment, the first surface 93 that cooperates with horizontal plane 82 slides into push rod 8 upper surfaces along first inclined plane 81, simultaneously, interlock moves on the piece 9, and drives and move on the brake lever 10 and compress brake spring 102, make groove 103 break away from button spring 53 on free-ended the cooperation, subsequently, shift knob 6 is replaced the microswitch 11 with its corresponding position, and motor 2 starts, and drive gear wheel 52 rotates, because the effect of frictional force makes button spring 53 screw and drive output shaft 51 and rotates with gear wheel 52, the saw chain bar is also worked thereupon.

Referring to Fig. 5, groove 103 both sides are equipped with outward-dipping guiding surface 104, and this guiding surface 104 can make groove 103 and button spring 53 free end better fit.Pushing block 7 is fixed together by a straight pin 72 with brake baffle plate 3, and housing 1 is provided with the chute 13 that slides for this straight pin 72.

The foregoing description is only for the usefulness that the utility model is described; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. electric chain saw, comprise housing (1), motor (2), the gearbox (5) that housing (1) front end one side is provided with that brake baffle plate (3), rear end are provided with handle (4), inside is provided with and is in transmission connection with motor (2), gearbox (5) comprises output shaft (51) and is installed in gear wheel (52) on this output shaft (51), be provided with button spring (53) between gear wheel (52) and the output shaft (51), this button spring (53) one ends and output shaft (51) is affixed and tight fit with it, the other end be free end and with gear wheel (52) movingly; Described housing also is provided with the brake stop device in (1), it is characterized in that: described brake stop device comprises the shift knob of being located on the handle (4) (6), the push rod (8) of replacing mutually and can sliding with its action with shift knob (6), with brake baffle plate (3) affixed and can before and after the pushing block (7) that slides, be located between push rod (8) and the pushing block (7) and and form the interlock piece (9) of interlock respectively with the two, one brake lever (10) that can slide up and down is installed on the described interlock piece (9), this brake lever (10) is in when the next its lower end can go up free end by button handsetting spring (53), and button spring (53) is unclamped and the cooperating of gear wheel (52).

2. electric chain saw as claimed in claim 1, it is characterized in that: described shift knob (6) is hinged in the handle (4), its hinged end extension has a push arm (61), upper end of this push arm (61) and push rod (8) one ends are replaced, push rod (8) other end is provided with downward-sloping first inclined-plane (81) and the horizontal plane (82) from the terminal extension in this first inclined-plane, also is provided with push rod back-moving spring (83) between described push rod (8) and the described housing (1).

3. electric chain saw as claimed in claim 2, it is characterized in that: described interlock piece (9) has first end (91) and second end (92), be respectively equipped with acclivitous first surface (93) and second curved surface (94) on the lower surface of two ends, also be provided with a downward slope (95) on the upper surface that second end (92) is located, intersect with second curved surface (94) on this slope (95), and the inboard upper surface of described pushing block (7) is provided with second inclined plane (71) of matching with second curved surface (94); Described interlock piece (9) middle part also is provided with a through hole (98).

4. electric chain saw as claimed in claim 3, it is characterized in that: described brake lever (10) can slide up and down and is installed in the through hole (98) of interlock piece (9), it is positioned at interlock piece (9) upper part one block (101) is installed, be provided with a brake spring (102) that is coated at brake lever between this block (101) and the housing (1), the outer wall of brake lever (10) lower end is provided with one and goes up the groove (103) that free end matches with button spring (53).

5. electric chain saw as claimed in claim 4 is characterized in that: described groove (103) both sides are equipped with outward-dipping guiding surface (104).

6. as claim 2 or 3 or 4 or 5 described electric chain saws, it is characterized in that: described push rod (8) is provided with three cavitys (84,85,86) along its length successively, wherein, projection (12) on former and later two cavitys (84,86) and housing (1) inwall is slidingly matched, and is provided with described push rod back-moving spring (83) in the middle cavity (85).

7. as claim 1 or 2 or 3 or 4 or 5 described electric chain saws, it is characterized in that: described pushing block (7) is fixed together by a straight pin (72) with brake baffle plate (3), and described housing (1) is provided with the chute (13) that slides for this straight pin (72).

8. as claim 1 or 2 or 3 or 4 or 5 described electric chain saws, it is characterized in that: in described handle (4) and the described housing (1) microswitch (11) is installed all, the activation button on two microswitches (11) second end (92) with shift knob (6) and interlock piece respectively is corresponding.