CN202824851U

CN202824851U - Electric reciprocating saw

Info

Publication number: CN202824851U
Application number: CN 201220449801
Authority: CN
Inventors: 黄跃
Original assignee: NINGBO HEISONG TOOLS CO Ltd
Current assignee: NINGBO YINGFUSHENG BRAND INTERNATIONAL CO., LTD.
Priority date: 2012-09-05
Filing date: 2012-09-05
Publication date: 2013-03-27
Anticipated expiration: 2022-09-05

Abstract

The utility model discloses an electric reciprocating saw which comprises a machine case and a motor which is used as a power source. The motor is linkage with reciprocating rods which are fixedly provided with saw blades through transmission mechanisms, the number of the transmission mechanisms is two, the structures of the transmission mechanisms are in the same, and the two transmission mechanisms are arranged in a parallel mode. Each transmission mechanism comprises big gears, crank shafts, and swing link bearings, wherein the big gears are in linkage with an output end of the motor, the crank shafts are fixed with the centers of the big gears, the swing link bearings are arranged on the peripheries of the crank shafts, and two big gears are respectively arranged on two sides of the tail end of the output end of the motor. Besides, the number of the reciprocating rods fixedly provided with the saw blades are two, and each swing link bearing in each transmission mechanism is connected with each reciprocating rod. Due to the fact the motor can drag two big gears, two saw blades move in an opposite direction from beginning to end, and therefore a machine bears force from two opposite directions simultaneously, resultant force of external force borne by the machine is enabled to be zero so that the phenomenon of imbalance cannot appear. Therefore, vibration caused by cutting is obviously lowered, and therefore, cutting is stable, efficiency is high, and operation is safe. Due to the fact that opposite positions and angles of crank shaft bodies and bearing inner rings are changed, the saw blades have two different working strokes, and therefore the same reciprocating saw can satisfy cutting demands of workpieces with different materials.

Description

Electric reciprocating saw

Technical field

The utility model relates to a kind of reciprocating saw, and especially a kind of have two saw blades and can realize two-pass electric reciprocating saw.

Background technology

Electric reciprocating saw is a kind of instrument relatively more commonly used, is widely used in the industries such as automobile, propagation, wooden model, decoration, leather, by the straight reciprocating motion of saw blade workpiece is cut.The cutting object of reciprocating saw can be the mixing of timber, metal or these materials, because cutting object is wider, and also easy to carry, be suitable for the occasions such as house ornamentation.

Reciprocating saw commonly used all is single saw blade, with rotatablely moving by various transmission mechanism of motor, such as eccentric wheel, fork etc., be converted into the reciprocating motion of reciprocating lever, can number be the Chinese patent of CN202097463U referring to Granted publication, Granted publication number is the Chinese patent of CN2582802Y, and Granted publication number is Chinese patent of CN2877933Y etc.When reciprocating lever is reciprocating, must make the vibration on whole reciprocating saw generation Y-axis, the X-direction.For eliminating this vibration, can be by disposing balance weight in Y direction, yet existing reciprocating saw only whereby balance weight be difficult to be fitted on the position, and generally has the speed adjusting gear that carries out speed governing for the different operating requirement, more difficult registration aequum just when being adjusted to different speed, and on the X-direction than Y direction on more difficult configuration balance weight.

In addition, because saw blade is the one direction cutting, often produce the impact phenomenon of similar " recoil ", this recoil is born by the base of reciprocating saw fully.This be since saw blade in cut workpiece; workpiece has reaction force to it; the consequence of this reaction force is that the operator is difficult to control very accurately reciprocating saw; some phenomenons such as beat often can appear in operation; be difficult to when work, keep balance; the workpiece that is cut is produced some impacts; be not suitable for cutting some crisp materials; and be easy to cause operator's fatigue; make it can not use for a long time reciprocating saw, might damage the operator because of impact when serious.

Moreover, in the use procedure of reciprocating saw, often need to cut the workpiece of differing texture, as need the different stroke of reciprocating saw when cutting soft workpiece with hard workpiece, and series excited machine can only provide a rotating speed in the constant frequency that lights a cigarette, firm power situation, can't realize two-pass, thereby existing one-stroke reciprocating saw can not satisfy for different workpiece different stroke needs, thereby affected use.

The utility model content

Technical problem to be solved in the utility model is a kind of electric reciprocating saw, can eliminate vibration and reaction force by symmetrically arranged pair of saw blade, improves simultaneously cutting efficiency.

The utility model solves the problems of the technologies described above first technical scheme that adopts: a kind of electric reciprocating saw, comprise casing and as the motor of power source, described motor links by transmission mechanism and the reciprocating lever that is fixed with saw blade, it is characterized in that, described transmission mechanism has two, and structure is identical, be set up in parallel, each described transmission mechanism comprises the gear wheel with the interlock of the output of described motor, with the fixing bent axle in described gear wheel center, and the Oscillating lever bearing that is arranged on described bent axle periphery, two terminal both sides of output that described gear wheel is separately positioned on described motor; The described reciprocating lever that is fixed with saw blade also has two, and the described Oscillating lever bearing in each described transmission mechanism connects reciprocating lever separately.

Described Oscillating lever bearing comprises fork, the bearing outer ring that fixes with described fork, and place the bearing inner race that can do with described bearing outer ring relative motion in the described bearing outer ring, described bearing inner race has the inner ring hole of inclination; Described bent axle comprises main shaft, one end and the described gear wheel of described main shaft are fixed, the other end of described main shaft is extended with the bent axle main body that is inclination with described main shaft, described bent axle main body penetrates in the described inner ring hole, be provided with axially outstanding alignment pin with described bent axle main body adjacent on the end face of described main shaft, offer the stopper slot that the described alignment pin of confession of circumferential arc slides on the described bearing inner race end face relative with described main shaft, the two ends of described stopper slot have can with the first positioning step and second positioning step of described alignment pin butt.Thus, can control the direction of rotation of motor, so that reciprocating saw is operated in the state of large stroke or little stroke, with the cutting needs of the workpiece that satisfies differing texture.

Described Oscillating lever bearing also comprises the adapter sleeve that is arranged on outside the described fork, and described adapter sleeve is connected to described reciprocating lever by connecting pin, thereby the swing of fork can drive the straight reciprocating motion that reciprocating lever is done front and back.

Described bent axle main body passes that to be inserted in the crankshaft end cover coupling behind the described inner ring hole fixing, and end face and the described bearing inner race respective side end face of described crankshaft end cover are adaptive, to avoid bent axle and bearing inner race play when working.

Motor and gear wheel realize that the mode of interlock is preferably, and the output end of described motor is provided with pinion, described pinion both sides respectively with the gear wheel engagement of two described transmission mechanisms.

The utility model solves the problems of the technologies described above second technical scheme that adopts: a kind of electric reciprocating saw, comprise casing and as the motor of power source, described motor links by transmission mechanism and the reciprocating lever that is fixed with saw blade, it is characterized in that, described transmission mechanism is by front, after the first transmission mechanism and the second transmission mechanism that connect successively form, described the first transmission mechanism comprises the gear wheel with the interlock of the output of described motor, with fixing the first bent axle in described gear wheel center, and the first Oscillating lever bearing that is arranged on described the first bent axle periphery, described the second transmission mechanism comprises the second bent axle that is connected to described the first bent axle, and the second Oscillating lever bearing that is arranged on described the second bent axle periphery, described the first bent axle is opposite with described the second bent axle angle of inclination, the described reciprocating lever that is fixed with saw blade also has two, described the first Oscillating lever bearing connects the first reciprocating lever, and described the second Oscillating lever bearing connects the second reciprocating lever.

Described the first Oscillating lever bearing is provided with the first fork that the clutch shaft bearing outer ring with described the first Oscillating lever bearing fixes, and described the first fork overcoat has the first adapter sleeve, and described the first adapter sleeve is connected to described the first reciprocating lever by the first connecting pin; Described the second Oscillating lever bearing is provided with the second fork that the second bearing outer ring with described the second Oscillating lever bearing fixes, described the second fork overcoat has the second adapter sleeve, described the second adapter sleeve is connected to described the second reciprocating lever by the second connecting pin, thereby the swing of fork can drive the straight reciprocating motion that reciprocating lever is done front and back.

Motor and gear wheel realize that the mode of interlock is preferably, and the output end of described motor is provided with pinion, described pinion and the engagement of described gear wheel.

Compared with prior art, motor the utility model has the advantage of: owing to can drag two gear wheels simultaneously, and drive two reciprocating levers and do symmetrical reciprocating motion, therefore so that two saw blades are done the motion of opposite direction all the time, make thus machine bear simultaneously the opposite power of both direction, make machine bear the making a concerted effort almost nil of external force and unbalanced phenomenon can not occur, so machine is obviously descended by the vibration that cutting causes, so that cutting steadily, efficient is high, handling safety; By the direction of rotation of control motor, change relative position and the angle of bent axle main body and bearing inner race, thereby so that saw blade has two different impulse strokes, so that same reciprocating saw can satisfy the cutting needs of the workpiece of differing texture simultaneously; And adopt two transmission mechanisms to connect successively the mode that drives two reciprocating levers, then so that the structure of whole transmission is simpler, also therefore reduced cost.

Description of drawings

Fig. 1 is the perspective view of reciprocating saw of the present utility model;

Fig. 2 is the transmission mechanism enlarged diagram of reciprocating saw;

The front view of Fig. 3-1 Oscillating lever bearing of the present utility model;

Fig. 3-2 is the cutaway view of Oscillating lever bearing of the present utility model;

The schematic diagram of transmission mechanism when Fig. 4-1 is large stroke (part);

The side view of transmission mechanism when Fig. 4-2 is large stroke (part);

The front view of transmission mechanism when Fig. 4-3 is large stroke (part);

The cutaway view of transmission mechanism when Fig. 4-4 is large stroke (part);

Main shaft turned over the cutaway view of 180 ° of transmission mechanisms (part) behind the C when Fig. 4-5 was large stroke;

The schematic diagram of transmission mechanism when Fig. 5-1 is little stroke (part);

The side view of transmission mechanism when Fig. 5-2 is little stroke (part);

The front view of transmission mechanism when Fig. 5-3 is little stroke (part);

The cutaway view of transmission mechanism when Fig. 5-4 is little stroke (part);

The cutaway view of transmission mechanism when Fig. 6 is specific little stroke (part);

Fig. 7 is the schematic diagram of another embodiment of transmission mechanism;

Fig. 8 is the cutaway view of transmission mechanism (part) shown in Figure 7.

The specific embodiment

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

Embodiment one

Referring to Fig. 1 and Fig. 2, a kind of electric reciprocating saw comprises casing 1, be positioned at the grip part 2 of casing 1 end, motor as power source places in the casing 1, and the output both sides of motor are set side by side with the identical transmission mechanism of structure 3, and transmission mechanism 3 is connected with a reciprocating lever 4 respectively.

The output end of motor is provided with pinion 5, its both sides respectively with gear wheel 31 engagement of two transmission mechanisms 3, thus, the rotation of rotor can drive pinion 5 and rotate, thereby drives the rotation that two gear wheels 31 are made opposite direction.

Transmission mechanism 3 also comprises Oscillating lever bearing 32 and bent axle 33, Oscillating lever bearing 32 comprises fork 321, the bearing outer ring 322 that fixes with fork 321 that is positioned at fork 321 belows, and place bearing inner race 323 in the bearing outer ring 322, fork 321 and bearing outer ring 322 can be one-body molded also can be two parts independently, bearing inner race 323 outer surfaces offer the trajectory 3236 of annular, for ball 324 is set, so that bearing outer ring 322 is done relative motion with bearing inner race 323, referring to Fig. 3-1 and Fig. 3-2.Bearing inner race 323 has the inner ring hole 3231 of inclination, angulation is the angle of α between the central axis 3221 of bearing outer ring 322 and the central axis 3232 of inner ring hole 3231, the existence of this α angle is intended to increase the angle of inclination of bent axle 33, and the central axis of trajectory 3236 is consistent with the central axis 3221 of bearing outer ring 322.

Bent axle 33 comprises main shaft 331, one end of main shaft 331 is fixed on the center of gear wheel 31, drive rotation by gear wheel 31, the other end of main shaft 331 is extended with the bent axle main body 332 that is inclination with main shaft 331, the central axis 3311 of main shaft 331 and the central axis of bearing outer ring 322 3221 consistent (when bearing outer ring 322 is positioned at initial position), and angulation is the angle of β between the central axis 3321 of bent axle main body 332, this β angle has determined the size of the pendulum angle of fork 321, referring to Fig. 4-4.

Bent axle main body 332 is passed and is inserted into crankshaft end behind the inner ring hole 3231 and overlaps 333 interior couplings and fix, and the end face of crankshaft end cover 333 and this side end face of bearing inner race 323 are adaptive.The central axis of crankshaft end cover 333 and the central axis 3221 of bearing outer ring 322 are consistent.

On the end face of main shaft 331, be provided with axially outstanding alignment pin 3312 with bent axle main body 332 adjacents, offer therewith the stopper slot 3233 of circumferential arc on corresponding bearing inner race 323 these side end faces, the two ends of stopper slot 3233 have respectively the first positioning step 3234 and the second positioning step 3235, referring to Fig. 4-1.Thus, when reciprocating saw is worked, after bent axle main body 332 relatively rotates with bearing inner race 323, the alignment pin 3312 of main shaft 331 can with the first positioning step 3234 or the second positioning step 3235 butts, rotate thereby bent axle 33 can drive bearing inner race 323 thereupon.

Oscillating lever bearing 32 also comprises the adapter sleeve 325 that is arranged on outside the fork 321, and adapter sleeve 325 is flexibly connected by connecting pin 326 and reciprocating lever 4.Two reciprocating levers 4 be arranged in parallel, connect saw blade 7 by fast clamp mechanism 6 respectively.

When rotor rotates, the pinion 5 of its output end drives gear wheel 31 and rotates, thereby main shaft 331 rotates and since the alignment pin 3312 of main shaft 331 can with the first positioning step 3234 or the second positioning step 3235 butts of bearing inner race 323, thereby bearing inner race 323 rotates thereupon.Because two central axis of bearing inner race 323 and bearing outer ring 322 are inconsistent and the setting of ball 324, so that bearing outer ring 322 is done the swing of fore-and-aft direction when bearing inner race 323 rotates, thereby fork 321 drives the straight reciprocating motion that reciprocating lever 4 is made fore-and-aft direction.Because the gear wheel 31 of two transmission mechanisms 3 lays respectively at the both sides of pinion 5, the relative motion of intercropping opposite direction when namely two gear wheels 31 are same is thus so that two reciprocating levers 4 are done the straight reciprocating motion of opposite direction.

Because be provided with inner ring hole 3231, alignment pin 3312 and stopper slot 3233 that bearing inner race tilts, reciprocating saw of the present utility model has two-pass, its operation principle is as described below.Referring to Fig. 4-1 to Fig. 4-5, the rotation direction of main shaft 331 is (counterclockwise) as shown by arrows, at this moment, and alignment pin 3312 and the first positioning step 3234 butts, reciprocating saw is operated in the state of range, α angle and the β angle of this moment superposes, and farthest increases the relative angle of inclination of bent axle main body 332, thus, fork 321 pendulum angle forward is alpha+beta, behind main shaft 331 Rotate 180s ℃, fork 321 swings the alpha+beta angle backward, moves back and forth with this; Referring to Fig. 5-1 to Fig. 5-4, the motor backward rotation, so that the rotation direction of main shaft 331 is opposite during with large stroke, as shown by arrows (clockwise), because inertia, the effects such as resistance, bent axle 33 and bearing inner race 323 relatively rotate, relative position between the two, angle changes, alignment pin 3312 turns to and the second positioning step 3235 butts, reciprocating saw is operated in the state of little stroke, the central axis of inner ring hole 3231 forms the γ angle between the projection 3321 on the central axis A of the projection 3232 ' on the A-A face and bent axle main body 332-A face, be that the γ angle is the projection angle of angle α on the A-A face, the angular range of γ is-α≤γ≤α that the pendulum angle of fork 321 is γ+β.

Referring to Fig. 6, after the angle of inclination of the angle of inclination of bent axle main body 332 and bearing inner race 323 stack, the γ value is-during α, the pendulum angle of fork 321 is β-α, i.e. the minimum stroke that reciprocating saw work is desirable.

Get different values by radian, position to stopper slot 3233, can be so that the value of the large stroke of different reciprocating saw, little stroke be not identical, to satisfy the needs of real work.The pendulum angle of fork 321 needn't one be decided to be alpha+beta when being large stroke, and the pendulum angle of fork 321 also needn't one be decided to be β-α during little stroke, and large stroke and little stroke are only for comparatively speaking.

Embodiment two

Referring to Fig. 7 and Fig. 8, the difference of itself and above-described embodiment is, transmission mechanism comprises forward and backward the first transmission mechanism 3 ' and the second transmission mechanism 3 that connects successively "; to replace the transmission mechanisms 3 of two independent settings; the first transmission mechanism 3 ' is connected to the first reciprocating lever 4 '; the second transmission mechanism 3 " be connected to the second reciprocating lever 4 ", the first reciprocating lever 4 ' be connected reciprocating lever 4 " be connected with saw blade respectively.The first transmission mechanism 3 ' comprises the gear wheel 31 ' with pinion 5 engagements of the output end of motor, with fixing the first bent axle 33 ' in gear wheel 31 ' center, and the first Oscillating lever bearing 32 ' that is arranged on the first bent axle 33 ' periphery; The second transmission mechanism 33 " comprise the second bent axle 33 that is connected to the first bent axle 33 ' ", and be arranged on the second bent axle 33 " the second Oscillating lever bearing 32 of periphery ".The first bent axle 33 ' passes behind the first Oscillating lever bearing 32 ' and the second bent axle 33 " be connected the first bent axle 33 ' and the second bent axle 33 " also for being symmetrical arranged, namely the angle of inclination is opposite.The second bent axle 33 ' passes the second Oscillating lever bearing 32 " after be inserted into crankshaft end cover 333 " in coupling fixing.

The first Oscillating lever bearing 32 ' comprise the first fork 321 ' and be located at the first fork 321 ' below with the fixing clutch shaft bearing outer ring 322 ' of the first fork 321 ', the first fork 321 ' overcoat has the first adapter sleeve the 325 ', the first adapter sleeve 325 ' to be connected to the first reciprocating lever 4 ' by the first connecting pin 326 '; The second Oscillating lever bearing 32 " comprise the second fork 321 " and be located at the second fork 321 " below with the second fork 321 " fixing the second bearing outer ring 322 "; the second fork 321 " overcoat has the second adapter sleeve 325 ", the second adapter sleeve 325 " be connected to the second reciprocating lever 4 by the second connecting pin (not shown) ".Thus so that the first fork 321 ' on the first Oscillating lever bearing 32 ' and the second Oscillating lever bearing 32 " on the second fork 321 " do the swing of opposite direction, thereby two reciprocating levers 4 ', 4 " do the straight reciprocating motion of opposite direction.

Embodiment three

In the above embodiments one and embodiment two, reciprocating saw is to be operated under the two-pass state, the difference of present embodiment is, α angle between the central axis 3221 of bearing outer ring 322 and the central axis 3232 of inner ring hole 3231 is 0, be bearing outer ring 322 and inner ring hole 3231 coaxial settings, simultaneously, also cancelled the stopper slot that matches with alignment pin on the alignment pin on the main shaft end face and bearing inner race among above-mentioned the first embodiment, i.e. this moment, reciprocating saw is operated in the one-stroke state.

The above only is preferred embodiment of the present utility model; should be pointed out that for the ordinary skill in the art, do not breaking away under the principle prerequisite of the present utility model; can also make various deformation and improvement, this also should be considered as protection domain of the present utility model.

Claims

1. electric reciprocating saw, comprise casing (1) and as the motor of power source, described motor links by transmission mechanism (3) and the reciprocating lever (4) that is fixed with saw blade (7), it is characterized in that, described transmission mechanism (3) has two, and structure is identical, be set up in parallel, each described transmission mechanism (3) comprises the gear wheel (31) with the interlock of the output of described motor, with the fixing bent axle (33) in described gear wheel (31) center, and the Oscillating lever bearing (32) that is arranged on described bent axle (33) periphery, two described gear wheels (31) are separately positioned on the terminal both sides of output of described motor; The described reciprocating lever (4) that is fixed with saw blade (7) also has two, and the described Oscillating lever bearing (32) in each described transmission mechanism (3) connects reciprocating lever (4) separately.

2. electric reciprocating saw as claimed in claim 1, it is characterized in that, described Oscillating lever bearing (32) comprises fork (321), the bearing outer ring (322) that fixes with described fork (321), and placing the interior bearing inner race (323) that can do with described bearing outer ring (322) relative motion of described bearing outer ring (322), described bearing inner race (323) has the inner ring hole (3231) of inclination; Described bent axle (33) comprises main shaft (331), one end of described main shaft (331) and described gear wheel (31) are fixing, the other end of described main shaft (331) is extended with the bent axle main body (332) that is inclination with described main shaft (331), described bent axle main body (332) penetrates in the described inner ring hole (3231), be provided with axially outstanding alignment pin (3312) with described bent axle main body (332) adjacent on the end face of described main shaft (331), offer the stopper slot (3233) that the described alignment pin of confession (3312) of circumferential arc slides on described bearing inner race (323) end face relative with described main shaft (331), the two ends of described stopper slot (3233) have can with the first positioning step (3234) and second positioning step (3235) of described alignment pin (3312) butt.

3. electric reciprocating saw as claimed in claim 2, it is characterized in that, described Oscillating lever bearing (32) also comprises the adapter sleeve (325) that is arranged on outside the described fork (321), and described adapter sleeve (325) is connected to described reciprocating lever (4) by connecting pin (326).

4. electric reciprocating saw as claimed in claim 2, it is characterized in that, described bent axle main body (332) passes that to be inserted in the crankshaft end cover (333) coupling behind the described inner ring hole (3231) fixing, and the end face of described crankshaft end cover (333) and described bearing inner race (323) respective side end face are adaptive.

5. such as each described electric reciprocating saw among the claim 1-4, it is characterized in that, the output end of described motor is provided with pinion (5), described pinion (5) both sides respectively with the engagement of the gear wheel (31) of two described transmission mechanisms (3).

6. electric reciprocating saw, comprise casing (1) and as the motor of power source, described motor links by transmission mechanism and the reciprocating lever that is fixed with saw blade, it is characterized in that, described transmission mechanism is by front, after the first transmission mechanism (3 ') of connecting successively and the second transmission mechanism (3 ") form; described the first transmission mechanism (3 ') comprises the gear wheel (31 ') with the output interlock of described motor; the first bent axle (33 ') of fixing with described gear wheel (31 ') center; and the first Oscillating lever bearing (32 ') that is arranged on described the first bent axle (33 ') periphery; described the second transmission mechanism (33 ") comprises the second bent axle of being connected to described the first bent axle (33 ') (33 "); and the second Oscillating lever bearing (32 ") that is arranged on described the second bent axle (33 ") periphery, described the first bent axle (33 ') and described the second bent axle (33 ") angle of inclination is opposite; the described reciprocating lever that is fixed with saw blade also has two; described the first Oscillating lever bearing (32 ') connects the first reciprocating lever (4 '), and described the second Oscillating lever bearing (32 ") connects the second reciprocating lever (4 ").

7. electric reciprocating saw as claimed in claim 6, it is characterized in that, described the first Oscillating lever bearing (32 ') is provided with the first fork (321 ') that the clutch shaft bearing outer ring (322 ') with described the first Oscillating lever bearing (32 ') fixes, described the first fork (321 ') overcoat has the first adapter sleeve (325 '), and described the first adapter sleeve (325 ') is connected to described the first reciprocating lever (4 ') by the first connecting pin (326 '); Described the second Oscillating lever bearing (32 ") is provided with the second fork of fixing with the second bearing outer ring of described the second Oscillating lever bearing (32 ") (322 ") (321 "), described the second fork (321 ") overcoat has the second adapter sleeve (325 "), and described the second adapter sleeve (325 ") is connected to described the second reciprocating lever (4 ") by the second connecting pin.

8. such as claim 6 or 7 described electric reciprocating saws, it is characterized in that the output end of described motor is provided with pinion (5), described pinion (5) and described gear wheel (31 ') engagement.