CN2191730Y - Bow-saw capable of adjusting saw blade dip angle - Google Patents

Abstract

The utility model relates to a bow-saw capable of adjusting a saw blade dip angle belonging to the improvement for a cutting saw tool. The bow-saw capable of adjusting a saw blade dip angle is composed of a saw bow, a front hook supporting rod, a back hook supporting rod, a saw blade hooked between the front hook supporting rod and the back hook supporting rod, and a butterfly nut. The front hook supporting rod and the back hook supporting rod penetrate through the front end and the back end of the saw bow. The tilt angle of the saw blade is adjusted by adjustable wheels which are respectively provided with a ratchet and are arranged on the front hook supporting rod and the back hook supporting rod. The bow-saw can be fit for the miter saw busywork with various angles. The utility model has the advantages of convenience and labor saving. An operator is not easily tired. The saw blade is not easily damaged. The adjustment for the tilt angle of the saw blade is simple and rapid.

Description

Bow-saw capable of adjusting saw blade dip angle

The utility model relates to a kind of improvement of sawing tool.

At present the structure of bow saw commonly used is: saw blade colludes and is contained in colluding of saw bow front and back end and holds on the bar, nationality comes tight saw blade or pine to unload the saw blade that changes the outfit with the adjustment of before colluding the wing nut of holding the screw-threaded engagement on the bar overhanging end, and saw blade colludes when being contained on the saw bow, the inclination angle of saw blade is changeless, be uncontrollable, desire tiltedly to saw operation, whole bow saw must be tilted to a certain angle and cut out saw, will cause like this to control to be difficult for and to influence it and cut out the saw effect, also have because of controlling the improper impaired accident of saw blade that causes simultaneously.In addition, the sanction saw of getting inclination situation does not meet ergonomics, thereby easily causes human-body fatigue.

The purpose of this utility model is the bow saw that a kind of improved saw blade tilt adjustable will be provided, and this kind hack saw blade can be adjusted to a certain inclination angle according to the operation needs.

The bow saw that the purpose of this utility model is achieved in that adjustable sawblade dip angle by saw bow and be placed through the saw bow rear and front end before collude hold bar and after collude hold bar and collude collude before and after placing hold the saw blade between the bar and be screwed together in before the wing nut that colludes on the thread segment of holding the bar overhanging end formed, it is characterized in that: ratchet hole before the front side end of saw bow establishes, before collude and hold on the bar regulating wheel before the key cover one, wear a front spring between the baffle ring of holding on the bar again at preceding regulating wheel and preceding colluding, on the front end face of preceding regulating wheel, be provided with the convex shoulder of band ratchet, itself and preceding ratchet hole are meshed, collude to hold and wear a locating piece that has ratchet hole, back at the one end on the bar earlier thereafter, again after collude the back regulating wheel of the convex shoulder of holding the cover of key on the bar one band ratchet, it can be meshed with the back spinous foramen, between locating piece and back regulating wheel, also wear a rear spring, desire is adjusted the inclination angle of saw blade, can unscrew wing nut earlier, make saw blade lax, regulating wheel made itself and preceding ratchet hole break away from engagement before this moment, pressure pushed away, because saw blade is lax, back regulating wheel and locating piece are because the rear spring extension, make them break away from engagement, regulating wheel is to a certain angle before rotating in the regulating wheel before pressure pushes away, this moment, saw blade also rotated a certain angle, after reaching the angle of requirement, promptly unclamp preceding regulating wheel, make it to mesh with the ratchet hole, then screwing wing nut strains saw blade gradually, collude after the tension simultaneously and hold bar, make back regulating wheel and the engagement of ratchet hole, back, adjustment saw blade angle is promptly accused and is finished.

The bow saw of adjustable sawblade dip angle described in the utility model is owing to the inclination angle of its saw blade can be regulated arbitrarily, so can adapt to various oblique saw operations, convenient and labor-saving, operator's indefatigability, saw blade is not fragile yet, and the adjustment at saw blade inclination angle is simple and easy quick by the operation of front side one side.

Description of drawings:

Fig. 1 is an outline drawing of the present utility model

Fig. 2 is a structural relation schematic diagram of the present utility model

Fig. 3 is each parts exploded view of the present utility model

Describe the embodiment of the bow saw of adjustable sawblade dip angle described in the utility model in detail below in conjunction with accompanying drawing: it has a saw bow 10, ratchet hole 11 before its front end establishes one, collude before in preceding ratchet hole 11, placing one and hold bar 12, before collude on the thread segment 13 of the overhanging end of holding bar 12 and screw togather a wing nut 16, the preceding regulating wheel 17 and a front spring 18 of the convex shoulder 171 of a sheathed band ratchet on preceding many ribs section 14 after preceding colluding the thread segment 13 of holding bar 12, front spring 18 is subjected to collude before being located at thereafter the spacing of the baffle ring 15 held on the bar 12, on the periphery of preceding regulating wheel 17, be provided with delineation 172, on the other end of preceding regulating wheel 17, be provided with a circle groove, so that bearing front spring 18, elastic force by front spring 18, regulating wheel 17 and 11 engagements of preceding ratchet hole before forcing, collude to hold and wear a locating piece 21 that back ratchet hole 22 is arranged at the one end on the bar 23 earlier thereafter, again after collude on many ribs section 24 of holding bar 23 sheathed one the back regulating wheel 25, and on ratchet hole, back 22 and the back bar section between the regulating wheel 25 a sheathed rear spring 26, front and back regulating wheel 17,25 and ratchet hole, front and back 11,22 groove should be synchronous regime, collude before making to collude after being with when holding bar 12 rotation and hold bar 23 synchronization actions, and then reach the purpose of adjusting the saw blade inclination angle, collude before saw blade 30 colludes and is loaded on hold bar 12 and after collude and hold between the bar 23.Adjusting the action at saw blade inclination angle finishes like this, as shown in Figure 1 and Figure 2, before and after collude and hold bar 12,23 and colluded and adorned saw blade 30, regulate wing nut 16, can control saw blade 30 and reach tight state, this moment, front spring 18 and rear spring 26 all were compressive state, and front and back regulating wheel 17,25 also meshes with ratchet hole, front and back 11,22 separately, make saw blade 30 fixing, can not rotate.If desire is adjusted the inclination angle of saw blade 30, then adjust wing nut 16 earlier, make saw blade 30 lax, spring 18 before and after this moment, 26 all uphold, preceding regulating wheel 17 still meshes with ratchet hole 11, then regulating wheel 25, because of rear spring 26 extensions are subjected to ejection, make it to break away from engagement with ratchet hole, back 22, regulating wheel 17 compression front spring 18 made itself and preceding ratchet hole 11 break away from engagement before this moment, pressure pushed away, meanwhile, regulating wheel 17 before the rotation, collude before the drive and hold bar 12 rotations, saw blade 30 also rotates thereupon, after reaching the angle that is required, regulating wheel 17 before promptly unclamping, make it 11 engagements of heavy and preceding ratchet hole, then screw wing nut 16, saw blade 30 is strained gradually, also collude after the pulling and hold bar 23 and make back regulating wheel 25 and ratchet hole, back 22 engagement again, Here it is adjusts the process at saw blade inclination angle, in this process, even before and after the angle of saw blade 30 deviation is arranged slightly, because of front and back regulating wheel 17,25 with ratchet hole, front and back 11, in the design of 22 ratchet line and the installation, consider to make it to be synchronous regime, so can force back regulating wheel 25 to snap in the appropriate location eventually.

Claims (2)

1, a kind of bow saw of adjustable sawblade dip angle, it by saw bow (10) and be placed through saw bow (10) rear and front end before collude hold bar (12) and after collude and hold bar (23) and collude to collude before and after placing and hold bar (12), (23) saw blade between (30) and be screwed together in before the wing nut (16) that colludes on the thread segment (13) of holding bar (12) overhanging end form, it is characterized in that: the front side end at saw bow (10) is provided with a ratchet hole (11), before collude and hold bar (12) and go up regulating wheel (17) before the key cover one, collude between the baffle ring of holding on the bar (12) (15) at preceding regulating wheel (17) and before being positioned at and to wear a front spring (18) again, on the front end face of preceding regulating wheel (17), be provided with the convex shoulder (171) of band ratchet, itself and preceding ratchet hole (11) are meshed, collude to hold and wear a locating piece (21) that has ratchet hole, back (22) at the one end on the bar (23) earlier thereafter, again after collude and hold the back regulating wheel (25) that bar (23) is gone up the convex shoulder of key cover one band ratchet, make itself and ratchet hole, back (22) engagement, between locating piece (21) and back regulating wheel (25), also wear a rear spring (26).

2, the bow saw of adjustable sawblade dip angle according to claim 1 is characterized in that: delineation (172) is arranged on the periphery of its preceding regulating wheel (17).

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