CN200963714Y

CN200963714Y - Reciprocating saw with wobbly saw bit

Info

Publication number: CN200963714Y
Application number: CN 200620126406
Authority: CN
Inventors: 陈亚生
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2006-10-16
Filing date: 2006-10-16
Publication date: 2007-10-24
Anticipated expiration: 2016-10-16

Abstract

The utility model discloses a reciprocating saw with a wiggling saw blade, comprising a cover, a motor arranged in the cover, a reciprocating lever, a saw blade arranged at one end of the reciprocating lever, a transmission mechanism which is connected to the output shaft of the motor and which is connected to the other end of the reciprocating lever through a rotary shaft, a guide sleeve which is fixed in the cover and in which the other end of the reciprocating lever is allowed to move forth and back, a friction bearing which supports the middle part of the reciprocating lever, a bearing support which supports the friction bearing and which is connected to the friction bearing through the rotary shaft, a bearing support slide groove arranged in the cover, an adjusting mechanism which can drive the bearing support to move in the slide groove. With such a structure, the saw blade can wiggle forwards and backwards to enhance cutting efficiency, at the same time, the wiggling mechanism is stable and reliable and can conveniently and effectively adjust the wiggle range of the saw blade; compared with the public technology, the utility model has obvious advantages.

Description

The reciprocating saw that saw blade can be swung

Technical field

The utility model relates to a kind of reciprocating saw, relates in particular to the reciprocating saw that a kind of saw blade can be swung, and belongs to cutting class technical field of tools.

Background technology

Reciprocating saw comprises a reciprocating lever usually, connects saw blade, and reciprocating lever is made axially reciprocating under driven by motor, and then the drive saw blade is made reciprocal cutting movement.On this basis, also develop the reciprocating saw that saw blade swing in a kind of cutting process.Saw blade comprises two strokes in the reciprocating motion process, one is the cutting stroke, and another is a recovery stroke.In the time of in the cutting stroke, saw blade lifts to cut direction, thereby improves cutting efficiency, and saw blade in Recovery Process the back pendulum takes place simultaneously, leaves cutting position, is beneficial to saw blade and resets.

The mechanism that realizes the swing of reciprocating saw saw blade in the prior art has a variety of, and wherein having a kind of is by an intermediary agency rotatablely moving of motor output shaft to be changed into the swing of fairlead, and then swing is passed to reciprocating lever and saw blade.As the patent No. be the United States Patent (USP) of US5392519 disclosed have so a kind of reciprocating saw of saw blade swing mechanism.Such saw blade swing mechanism generally all needs a cam surface and a connecting rod, structure more complicated, and wearing and tearing easily.

Publication number is that the U.S. Patent application of US 2005/0016001 A1 has disclosed a kind of improved saw blade swing mechanism, reciprocating lever moves in a fairlead, fairlead can rotate around turning cylinder, rotate around turning cylinder by regulating fairlead, thereby regulate the angle of inclination of fairlead, realize swing when reciprocating lever moves back and forth simultaneously with respect to reciprocating lever.In this mechanism, must rotate around turning cylinder, and after fairlead is adjusted to certain angle, be fixed, need the mechanism of the fixed guide cover of a complexity for the stability that guarantees fairlead usually by a fixed mechanism owing to fairlead.Even like this, because saw blade strength in sawing process is bigger, the stability of fairlead can not be guaranteed fully.

Summary of the invention

The reciprocating saw that provides a kind of saw blade to swing is provided the purpose of this utility model, and it is simple in structure, good manufacturability, and a high stability is arranged in sawing process.

For achieving the above object, the reciprocating saw that the saw blade that the utility model discloses can be swung comprises a casing, a motor that is installed in the casing, a reciprocating lever, a saw blade that is installed to described reciprocating lever first end, one is connected with the output shaft of described motor, and the transmission mechanism that is connected by turning cylinder with second end of described reciprocating lever, one is fixedly mounted in the described casing, constitute the guider of moving sets with second end of reciprocating lever, one support described reciprocating lever and can be along with the swing of reciprocating lever free-moving bearing, also comprise a governor motion that can make bearing be approximately perpendicular to reciprocating lever and be parallel to the displacement on plane, saw blade place.

When the central lines of the center line of guider and reciprocating lever, under motor-driven, reciprocating lever does reciprocating linear motion; When the needs saw blade is swung, make the support of bearing move by regulating governor motion along direction perpendicular to saw blade reciprocating motion, thereby make between reciprocating lever and the guider and form certain included angle, this moment, reciprocating lever was done plane motion under motor-driven, the end that saw blade is installed both moved reciprocatingly, and also realized required swing simultaneously.

Because the utility model has replaced the skew of reciprocating lever guider with the skew of bearing, also avoided simultaneously the friction between prior art convexity wheel face and the swing control piece, make reciprocating saw stability when sawing better reduce the loss of energy consumption and machine parts; Can regulate the saw blade amplitude of fluctuation exactly by the displacement of control bearing is convenient in addition; And the reciprocating motion of reciprocating saw saw blade and swing are controlled respectively, do not disturb mutually.

Description of drawings

The utility model is described in further detail by the specific embodiment below in conjunction with accompanying drawing.

Fig. 1 is the inside elevation view of the reciprocating saw that can swing of the saw blade in a kind of first-selected embodiment of the utility model, and wherein the part of reciprocating saw does not show, its part casing also removes;

Fig. 2 is saw blade can be swung among Fig. 1 a reciprocating saw along reciprocating saw cutaway view longitudinally;

Fig. 3 is the view that saw blade can be swung among Fig. 2 reciprocating saw is in swing state;

Fig. 4 is saw blade can be swung among Fig. 2 the reciprocating saw cutaway view along the A-A direction;

Fig. 5 has shown the stereogram of the fairlead of the reciprocating saw that the saw blade among Fig. 1 can be swung;

Fig. 6 has shown the fore bearing support of the reciprocating saw that the saw blade among Fig. 1 can be swung and the explosive view of governor motion thereof.

The specific embodiment

As shown in Figure 1, the reciprocating saw that saw blade in a kind of first-selected embodiment of the present utility model can be swung comprises a casing 1 (the part casing is not shown in Fig. 1) of being made up of two or multi-disc housing, a motor 2 that is installed in the casing, a saw blade 3, transmission system (showing among Fig. 1) that is installed in the casing is connected with saw blade 3 and is used to drive saw blade 3 and moves reciprocatingly, a swing mechanism makes saw blade 3 can carry out swing simultaneously when moving back and forth.

The composition and the structure of the reciprocating saw that can swing the saw blade in this first-selected embodiment below in conjunction with Fig. 2 to Fig. 6 are done detailed description.As Fig. 2 and Fig. 4 and shown in Figure 5, the output of motor 2 has an output shaft 4, forms a bevel gear part 4a on the output shaft 4.A bevel gear part 4a engagement that is installed on casing interior bevel gear 5 and the output shaft 4.The one eccentric eccentric shaft 5a that installs is arranged on bevel gear 5, and an end of toggle-action lever 6 is rotationally connected by eccentric shaft 5a and bevel gear 5.The rear end of the other end of toggle-action lever 6 and reciprocating lever 8 is rotationally connected by turning cylinder 10.The two ends of turning cylinder 10 are stretched out reciprocating lever 8 and at its two ends a pair of

roller

11,12 are housed, and

roller

11,12 preferably can freely rotate by the central axis 24 around turning cylinder 10 on turning cylinder 10.In the fairlead 7 that is fixedly mounted in the casing a pair of gathering sill 9,9 ' is arranged.Rotate when bevel gear 5, when making an end of toggle-action lever 6 move along with the eccentric shaft 5a on the bevel gear 5, the other end of toggle-action lever 6 can drive on the turning cylinder 10 this

roller

11,12 is rolled along the gathering sills 9,9 ' in the fairlead 7.In order to guarantee that reciprocating lever when swing do not interfere with fairlead, must leave enough spaces at swaying direction between reciprocating lever and the fairlead.In addition, reciprocating lever 8 also passes a sliding bearing 13 that is installed in the leading section in the casing 1.In state shown in Figure 1, when motor 2 rotates, on the motor output shaft 4 bevel gear part 4a drive bevel gear 5 and rotate, eccentric shaft 5a on the bevel gear 5 rotates around the rotating shaft of bevel gear 5, thereby driving toggle-action lever 6 rotates around turning cylinder 10 and drives turning cylinder 10 and this moves forward and backward in fairlead 7

roller

11,12, and then an end that makes reciprocating lever 8 be connected with turning cylinder 10 moves reciprocatingly in fairlead 7, so saw blade 3 is done reciprocal cutting movement.

As Fig. 3 and shown in Figure 6, be formed with a support of bearing sliding tray 17 in the casing 1, the support of bearing 14 with a countershaft installing hole 21 is positioned at support of bearing sliding tray 17.One countershaft 18, one end of each in 19 is contained on the sliding bearing 13, its other end is installed in respectively in the countershaft installing hole 21 of the support of bearing 14, two rotating

shafts

18,19 central shaft is located along the same line, here claim that this straight line is the central axis 26 of rotating

shaft

18,19, and perpendicular to the plane at reciprocating lever 8 and saw blade 3 places.So sliding bearing 13 can rotate in the support of bearing 14 around this countershaft 18,19.In other embodiments, also can not establish rotating

shaft

18,19 on the sliding bearing 13, and the outer wall of sliding bearing 13 and the inwall of the support of bearing 14 are made corresponding curve form, so sliding bearing 13 can be in swing in the support of bearing 14 under the drive of reciprocating lever 8.

Stretch out a threaded rod 14a on the support of bearing 14, this threaded rod 14a is perpendicular to rotating

shaft

18,19, and is parallel to the plane at saw blade 3 places.A nut 16 that is installed on the casing 1 cooperates with threaded rod 14a, and a knob portion 16a is arranged on the nut 16.The support of bearing 14 also comprises a pilot hole 20, and its position is relative with threaded rod 14a.Pilot hole 20 is used for receiving a guide finger 22 that is fixed on the casing.Be with a compression spring 15 on guide finger 22, an end of compression spring 15 acts on the casing 1, and the other end acts on the support of bearing 14.

Under the Figure 1 and Figure 2 state, reciprocating lever 8 is parallel all the time with gathering

sill

9,9 ', and 8 of reciprocating levers move back and forth.At this moment, if the knob portion 16a of rotation nut 16 makes threaded rod 14a produce axially-movable, to drive the support of bearing 14 and move, central axis 26 skews of rotating

shaft

18,19 along support of bearing sliding tray 17, reciprocating lever 8 tilts, and with gathering sill 9,9 ' shape in an angle.The change of this angle generating period along with the reciprocating motion of reciprocating lever 8:

roller

11,12 is during near sliding bearing 13, also is that saw blade 3 stretches out when the longest the angle maximum; And

roller

11,12 from sliding bearing 13 farthest, also is that saw blade 3 stretches out the most in short-term, and so the angle minimum is saw blade 3 swing in the plane at its place when back and forth cutting.The swing of saw blade 3 realizes by sliding bearing 13 18,19 rotation around the shaft.And the big I of amplitude of fluctuation is regulated by the degrees of offset of the rotation nut 16 and then the control support of bearing 14.

In addition, in this embodiment, be applied to elastic force between the support of bearing and the casing, can prevent that nut 16 is loosening in sawing process, thereby guarantee saw blade 3 stable when the swing cutting by compression spring 15.

In other embodiments of the present utility model, the structure of regulating the support of bearing 14 can realize by alternate manner, as long as bearing is produced perpendicular to moving on the direction of saw blade reciprocating motion.In other embodiments, the reciprocating transmission mechanism that the rotation of motor output shaft is converted into reciprocating lever can also have other structures and combination, and is not limited only to the structure of the transmission mechanism in the above-mentioned first-selected embodiment.In other embodiments, the sliding tray of spring bearing support can also be formed by a member that is independent of casing and is contained in the casing, and might not directly be formed at casing inside.In addition, make the governor motion that moves perpendicular to the saw blade reciprocating motion direction in the support of bearing sliding tray of the support of bearing in casing that other embodiments can also be arranged, and the nut, the threaded rod mechanism that are provided in this first-selected embodiment is provided.

Only be a kind of specific embodiment of the present utility model shown in description above and the accompanying drawing, the claimed scope of the utility model is based on claims.By to above describing and the understanding of accompanying drawing, those of ordinary skill in the art is by same mode, and perhaps with through simple form of replacing, non-creativeness ground is simply replaced partial component and is regarded as in the scope that the utility model is protected.

Claims

1. reciprocating saw that saw blade can be swung, comprise a casing, a motor that is installed in the casing, a reciprocating lever, a saw blade that is installed to described reciprocating lever first end, one is connected with the output shaft of described motor, and the transmission mechanism that is connected by turning cylinder with second end of described reciprocating lever, one is fixedly mounted in the described casing, constitute the guider of moving sets with second end of reciprocating lever, one support described reciprocating lever and can be along with the swing of reciprocating lever free-moving bearing, it is characterized in that, also comprise a governor motion that can make bearing be approximately perpendicular to reciprocating lever and be parallel to the displacement on plane, saw blade place.

2. the reciprocating saw that saw blade as claimed in claim 1 can be swung is characterized in that, also comprises a support of bearing that supports described bearing, a support of bearing sliding tray that is positioned at described casing.

3. the reciprocating saw that saw blade as claimed in claim 2 can be swung is characterized in that, bearing is connected by a countershaft with the support of bearing.

4. the reciprocating saw that saw blade as claimed in claim 2 can be swung is characterized in that, an elastic component is contained between the described casing and the described support of bearing.

5. the reciprocating saw that saw blade as claimed in claim 2 can be swung is characterized in that, a pilot hole is arranged on the support of bearing, and an end of a guide finger is contained in the pilot hole, and the other end is contained on the casing, and guide finger is parallel to the bearing direction of displacement.

6. the reciprocating saw that saw blade as claimed in claim 1 can be swung is characterized in that, governor motion comprises the adjustable diameter and screw adjusting mechanism of a threaded rod and nut formation.

7. the reciprocating saw that saw blade as claimed in claim 6 can be swung, it is characterized in that, also comprise a support of bearing that supports described bearing and connect by a countershaft with it, a support of bearing sliding tray that is positioned at described casing, described adjustable diameter and screw adjusting mechanism acts on the support of bearing.

8. the reciprocating saw that saw blade as claimed in claim 1 can be swung is characterized in that, contains at least one gathering sill on the described guider, and at least one is housed on the turning cylinder on second end of reciprocating lever can be along the roller of gathering sill rolling.