CN200991925Y

CN200991925Y - Tool-free adjusting structure of chain saw

Info

Publication number: CN200991925Y
Application number: CN 200620148698
Authority: CN
Inventors: 廖家兴
Original assignee: 钟李杏枝
Current assignee: Husqvarna AB
Priority date: 2006-10-19
Filing date: 2006-10-19
Publication date: 2007-12-19
Anticipated expiration: 2016-10-19

Abstract

The utility model provides a tool-less adjusting structure for chain saws, whose major characteristics are that a protecting cover is provided with an adjustment ring, an adjustment bolt, and an adjustment stud; the adjustment ring is provided with a driving gear; the adjustment bolt is combined with a driven gear that meshes with the driving gear; the adjustment bolt also forms a screw pair together with an adjustment stud that connects with a chain plate; therefore, when the user rotates the adjustment ring the adjustment stud will move along the adjustment bolt through the continuous actions of the driving gear and the driven gear, thereby adjusting the tightness of the chain; in addition, the adjustment ring can also be provided with a knob with a handle, wherein, the handle can be contained in the knob or can be moved extruding the knob, in order to increase the force arm of the knob and enable more convenient adjustment for the user.

Description

The instrument of exempting from of chain saw is adjusted structure

Technical field

The utility model is the structure that need not use aid just can adjust the chain tension of chain saw about a kind of.

Background technology

Taiwan applies for No. 90213097 and applies for that No. 94211435 patent case all discloses does not a kind ofly need to use aid just can adjust the adjusting device or the structure of the chain tension of chain saw; But the structure of this prior art is comparatively complicated, and the adjustment knob can't further increase the arm of force when rotated to reach more labour-saving operating effect.

Summary of the invention

Main purpose of the present utility model provides a kind of structure and more simplifies, and when adjusting chain tension more the labour-saving adjust structure.

Based on this, technological means of the present utility model be provided with at the protecting cover of being located at chain saw adjust ring, adjust bolt, with adjust double-screw bolt, this adjustment is equipped with driving gear, adjust bolt and be combined with the driven gear that meshes with this driving gear, also to form spiral right with an adjustment double-screw bolt that is connected in carrier bar for this adjustment bolt, therefore, and when ring is adjusted in rotation, be able to the adjustment double-screw bolt be moved along adjusting bolt, thereby adjust the degree of tightness of chain by the interlock of master, driven gear; In addition, this adjustment ring can also be provided with a knob with handle, and this handle can be accommodated in the knob, also can be moved outstanding knob, to increase the arm of force of knob, helps the more convenient adjustment of user.

The utility model can be provided with the one handle groove at an end face of described adjustment ring, this handle groove bottom surface then is provided with the hole that is through to the other end, in this hole a positioning block is set, and between the recess of this locating piece and this adjustment ring spring is set, this spring promotes described locating piece and outstanding this hole; Described handle is provided with the flange that can stop mutually with this locating piece corresponding to the one side of this knob, uses handle in handle groove by passing and outstanding when adjusting the ring external diameter, is utilized this locating piece to stop that this flange makes handle can arrive the location.In addition, the bottom surface of described handle groove can be made as the inclined-plane, uses in that handle is outstanding to form the outer end when adjusting the ring external diameter and be the heeling condition that raises up, and therefore when utilizing the handle rotation to adjust ring, is avoided handle to touch protecting cover and causes obstruction.

Driving gear and driven gear in the adjustment structure of the present utility model, its preferred embodiment are a pair of skew shaft gears, can be applicable to that two non-parallel and non-perpendicular central shafts carry out the power transmission.

Main feature of the present utility model is that the more aforementioned prior art of overall structure more simplifies, thereby manufacturing cost is more cheap, and adjust the ring external diameter because handle can extend, thereby adjust the rotary arm that encircles and extended, make when adjusting chain tension more laborsaving.

Description of drawings

Figure 1A is for showing the first direction three-dimensional exploded view of the utility model primary clustering syntagmatic.

Figure 1B is for showing the second direction three-dimensional exploded view of the utility model primary clustering syntagmatic.

Fig. 2 A is for showing the first direction stereogram of the outward appearance after the utility model primary clustering makes up.

Fig. 2 B is for showing the second direction stereogram of the outward appearance after the utility model primary clustering makes up.

Fig. 2 C rotates the embodiment stereogram of knob for showing the utility model handle.

Fig. 3 is for showing the plan view of the structure after the utility model primary clustering makes up.

Fig. 4 drives the partial perspective view of the structure of adjusting double-screw bolt for showing the utility model knob.

Fig. 5 rotates the embodiment stereogram of knob for showing handle shown in the 4th figure.

Primary clustering symbol description among the figure

1 protecting cover

Space in 10

11 first grooves

12 second grooves

13 the 3rd grooves

14 centre bores

15 axle bushes

16 retaining plugs

2 adjust ring

20 recesses

21 driving gears

22 through holes

3 knobs

31 polygonal holes

32 holes

33 handle grooves

331 recessed rails

34 handles

341 flanges

342 protruding rails

35 locating pieces

351 holes

36 springs

37 nuts

4 adjust bolt

41 driven gears

5 adjust double-screw bolt

51 screws

6 pads

61 grooves

62 through holes

63 screws

The specific embodiment

Following conjunction with figs. and element numbers are done more detailed description to embodiment of the present utility model, make to have the knack of this technical field person and can implement according to this after studying this specification carefully.

Consult shown in Figure 1A and Figure 1B, the instrument of exempting from of chain saw provided by the utility model is adjusted structure, its preferred embodiment includes a protecting cover 1 that is used for being installed in the chain saw body, protecting cover 1 has the first relative side and second side, and be provided with a centre bore 14 that connects this first and second side, an axle bush 15 is set in the centre bore 14; This first side is provided with one first groove 11, one second groove 12 and one the 3rd groove 13 that is arranged in a straight line; Wherein, first groove 11 has long length, adjusts bolt 4 to be used for holding one, and the length of this adjustment bolt 4 can extend in second groove 12, and in adjustment bolt 4 ends that extend to second groove 12 in conjunction with a driven gear 41, make driven gear 41 be contained in second groove 12; 13 of described the 3rd grooves are used for holding a retaining plug 16, and this retaining plug 16 contact with the end of adjusting bolt 4, rock (shown in the 3rd figure) to avoid adjusting spool moving of bolt 4.In addition, adjust the screw 51 that bolt 4 spirals are matched with an adjustment double-screw bolt 5, this adjustment double-screw bolt 5 is used to link the carrier bar (not shown).After adjustment bolt 4, driven gear 41 are installed in first groove 11, second groove 12 and the 3rd groove 13 respectively with retaining plug 16, again a pad 6 is fixed in protecting cover 1; Its fixed form is the through hole 62 that utilizes screw 63 to pass to be located on the pad 6, locks the screw on the protecting cover 1 again, makes simultaneously to adjust double-screw bolt 5 and expose the groove 61 (shown in the 2nd A figure) that is located on the pad 6.

Second side of protecting cover 1 then makes up adjusts ring 2, even can adjust the further again combined knob 3 of ring 2; Wherein, adjust the ring 2 first axial end faces and be provided with driving gear 21, adjust ring 2 and be located at axle bush 15 in the centre bore 14 of protecting cover 1 by a central shaft (not shown) string, and make driving gear 21 and driven gear 41 engagements; Therefore, when rotation adjustment encircles 2, utilized driving gear 21 to drive driven gear 41 rotations, adjust bolt 4 rotations thereby make, when adjusting bolt 4 rotations, to drive adjustment double-screw bolt 5 and move (shown in the 4th figure), and allow be combined in the carrier bar (not shown) tension of adjusting double-screw bolt 5 or loosen chain along adjusting bolt 4; Move toward which direction of adjusting bolt 4 as for adjusting double-screw bolt 5, then decide on the direction of rotation of adjusting ring 2.

In addition, the utility model can be further at second end face of adjusting ring 2 in conjunction with a knob 3, and a mobilizable handle 34 is set at knob 3, this handle 34 can move and the external diameter of outstanding knob 3 relative to this knob 3, and using increases the rotary arm (shown in the 2nd C figure and the 5th figure) of adjusting ring 2.This knob 3 and the preferable compound mode of adjusting ring 2, the recess 20 that can hold knob 3 in the second end face setting of adjusting ring 2, the outside end face of knob 3 then is provided with the handle groove 33 that can hold handle 4, handle groove 33 bottom surfaces can be made as the inclined-plane that raises up to the outer diameter, and the relative both sides of handle groove bottom surface are provided with recessed rail 331 respectively; Handle groove 33 bottom surfaces with respect to this recess 20 then are provided with the hole of running through 32, one locating piece 35 with hole 351 is set in this hole 32, one spring 36 is placed hole 351, and an end in contact of spring 36 promotes locating piece 35 outstanding these holes 32 in recess 20 bottom surfaces of adjusting ring 2 by spring 36.Described handle 34 is provided with the flange 341 that can stop mutually with this locating piece 35 corresponding to the relative both sides of the one side of knob 3, and is provided with the protruding rail 342 that slidably is matched with this recessed rail 331 in the relative both sides of handle 3.Handle 34 is to slip into recessed rail 331 by protruding rail 342 to be contained in the handle groove 33 (shown in the 2nd B figure); When needs increase the rotary arm of adjusting ring 2, handle 34 can be passed and outstanding ring 2 (shown in the 2nd C figure) that adjust along handle groove 33, and be utilized this locating piece 35 to stop that this flange 341 makes handle 34 arrive the location.In addition, rely on the ramped bottom surface of described handle groove, when the outstanding adjustment ring of handle external diameter, form the outer end and be the heeling condition that raises up, make when utilizing handle rotation adjustment ring, can avoid handle to touch protecting cover and cause obstruction.

The above person only is in order to explain preferred embodiment of the present utility model; be not that the attempt tool is to do any pro forma restriction to the utility model; be with; all have following of identical creation spirit do relevant any modification of the present utility model or change, all must be included in the category of the utility model intention protection.

Claims

The instrument of exempting from of 1 one kinds of chain saws is adjusted structure, and it comprises:

Protecting cover has centre bore;

Adjust ring, its first axial end face is provided with driving gear, and this adjustment ring is located at the centre bore of this protecting cover by the central shaft string;

Adjust bolt, be located at this protecting cover, and this adjustment bolting there is driven gear, this driven gear and the engagement of described driving gear;

Adjust double-screw bolt, have and the right screw of this adjustment bolt formation spiral;

When described adjustment ring rotates, drive described adjustment double-screw bolt via this master, driven gear and this adjustment bolt and move axially along adjusting bolt.
The instrument of exempting from of 2 chain saws as claimed in claim 1 is adjusted structure, it is characterized in that described adjustment ring is combined with knob, and this knob is provided with handle, and this handle can move relative to this knob, and the external diameter of outstanding this knob.
The instrument of exempting from of 3 chain saws as claimed in claim 2 is adjusted structure, it is characterized in that described adjustment ring is second end face with respect to this first end face, this second end face is provided with the recess that can hold this knob, described knob is provided with the hole of running through with respect to the end face of this recess, in this hole a positioning block is set, and be provided with spring between the recess of this locating piece and this adjustment ring, this spring promotes described locating piece and outstanding this hole; Described handle is provided with the flange that can stop mutually with this locating piece corresponding to the relative both sides of the one side of this knob.
The instrument of exempting from of 4 chain saws as claimed in claim 3 is adjusted structure, the end face that it is characterized in that described knob is provided with the handle groove that can hold this handle, the relative both sides of this handle groove bottom surface are provided with recessed rail, and the relative both sides of this handle are provided with the protruding rail that can be slidingly matched with this recessed rail.
The instrument of exempting from of 5 chain saws as claimed in claim 4 is adjusted structure, it is characterized in that the inclined-plane of bottom surface for raising up to the outer diameter of described handle groove.
The instrument of exempting from of 6 chain saws as claimed in claim 1 or 2 is adjusted structure, it is characterized in that described driving gear and driven gear are a pair of skew shaft gears.
The instrument of exempting from of 7 chain saws as claimed in claim 1 is adjusted structure, it is characterized in that described protecting cover is provided with first groove, second groove and the 3rd groove, this first groove is used for holding described adjustment bolt, this second groove is used for holding described driven gear, the 3rd groove is used for holding a rubber-like retaining plug, and this retaining plug contacts with the end of described adjustment bolt.