CN101085477A

CN101085477A - Cutter

Info

Publication number: CN101085477A
Application number: CN 200610093330
Authority: CN
Inventors: 王新
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2006-06-09
Filing date: 2006-06-09
Publication date: 2007-12-12
Anticipated expiration: 2026-06-09
Also published as: CN101085477B

Abstract

A cutter comprises the base, support parts matching with the base, sawing machine connected to the support part through the pivot shaft and being able to rotate around the pivot shaft and composed of sawing shaft, sawing blade rotating around the shaft, generator of the sawing blade shaft and the fixed protective hood connected with the generator and the active one matching with the fixed one, the active protective hood's drive device with at least three connecting pieces and at least two gears formed gear component wheels connected to at least one end to avoid the setting of cam curvature on the connecting piece or sawing machine, to apply to the embedment of the active protective hood.

Description

Cutting machine

Technical field

The present invention relates to a kind of cutting machine, particularly, the present invention relates to a kind of movable shield driving mechanism of cutting machine.

Background technology

In the existing cutting machine, consider safety factor, when saw is positioned at position of rest, the tooth of saw blade need be protected, and when saw is in the operating position, then need the tooth of saw blade is exposed.For this reason, the guard shield that protects blade teeth is divided into movable shield and decides guard shield.In the existing product, movable shield generally all is positioned at decides the guard shield outside; Movable shield is positioned at decides a kind of developing direction that the guard shield inboard then is the cutting machine product.

CN2535174Y has disclosed a kind of movable shield driving mechanism, between movable shield and support, connect by connecting rod, the connecting rod front end is provided with tooth, movable shield and the coaxial installation of saw blade axis, movable shield is fixedly connected with gear, and connecting rod also is provided with cam curve, secure shroud is provided with roller, by the engagement of tooth on gear and the connecting rod, roller cooperates with cam curve, realizes saw the opening fast of movable shield when position of rest is pivoted to the operating position.

US2004/0060407A1 has disclosed a kind of built-in movable shield driving mechanism of cutting machine guard shield that is used for, connecting rod is provided with cam curve, connecting rod is connected in respectively between support and the movable shield, on inwall, be provided with roller, by the interaction of roller and cam curve, realize saw the opening fast of movable shield when position of rest is pivoted to the operating position.

In above-mentioned two prior aries, all adopt the cooperation of cam curve and roller to realize saw the opening fast of movable shield when position of rest is pivoted to the operating position, and the manufacturing of cam curve and processing request are than higher, curve all adopts special shape, so, in the production process precision is difficult to control.And cam mechanism has the dead point when opening fast, and stuck phenomenon especially takes place easily in the process that movable shield has just begun to be opened fast, makes inconvenient operation.

Summary of the invention

The purpose of this invention is to provide a kind of manufacturing, improved cutting machine of operating characteristics be convenient to.

Further purpose of the present invention provides a kind of built-in cutting machine of movable shield that is suitable for, and structure is simple relatively.

A kind of cutting machine, comprise pedestal, the support member that connects with described pedestal, pass through pivotally connected saw with described support member, described saw can pivot around described pivot, described saw comprises saw blade axis, can be around the saw blade of saw blade axis rotation, drive the motor of described saw blade axis, decide guard shield and decide the matched movable shield of guard shield with described motor connects with described, the movable shield drive unit that links to each other with movable shield, described movable shield drive unit comprises at least one connector, and the gear assembly of being made up of two gears at least that links to each other with an end of described connector.

Described connector is a connecting rod.

The other end of described connector is connected with described movable shield, described gear assembly comprise be fixed on decide guard shield and the first gear coaxial setting of pivot and with second gear of described first gear external gear engagement, an end of described connector is connected with described second gear.

Described second gear is connected at first tie point with described support member, in the vertical direction, and described first tie point is positioned at the top of described pivot.

The other end of described connector is connected with described support member, and described gear assembly is connected with described saw.

Described gear assembly comprises and is positioned at described second gear that is positioned at movable shield of deciding first gear on the guard shield and cooperating with described first gear.

Mesh by cog belt or silent chain between described first gear and described second gear; Perhaps described first gear and described second gear are by being positioned at the mutual external gear engagement of the 3rd gear of deciding on the guard shield; Perhaps described first gear and described second gear are the internal gear engagement.

Described first gear diameter is greater than described second gear diameter.

Because connector cooperates with gear assembly, gear assembly has solved the problem of connector, pivot and movable shield rotation direction, and the eccentric mode that is provided with of big pinion and gear and connector has guaranteed the regulated at will of movable shield opening speed, avoided the setting of cam curve, only need to use conventional connector just can realize, and easy to operate smoothness is particularly suitable for the built-in cutting machine of movable shield.

Description of drawings

Fig. 1 is the schematic diagram of first embodiment of the invention cutting machine in the operating position.

Fig. 2 is the schematic diagram of first embodiment of the invention cutting machine in position of rest.

Fig. 3 is the front view of first embodiment of the invention cutting machine when position of rest.

Fig. 4 is the schematic diagram of second embodiment of the invention.

Fig. 5 is another schematic diagram of second embodiment of the invention.

Fig. 6 is the another embodiment schematic diagram of second embodiment of the invention gear assembly.

Fig. 7 is an embodiment schematic diagram again of second embodiment of the invention gear assembly.

Wherein:

1 pedestal, 2 supports, 3 saws

31 saw blades, 311 blade teeth, 32 saw blade axis

33 motors, 34 movable shield 35 are decided guard shield

4 connecting rods, 5 first gears, 6 second gears

7 pivots, 8 first tie points, 9 cog belts

10 the 3rd gears, 11 holes, 12 second tie points

13 grooves, 16 first pins, 17 second pins

18 the 3rd pins 19 the 4th pin, 20 guardrails

21 workpiece, 22 handles

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.

Cutting machine has herein comprised diagonal cutting saw, slip diagonal cutting saw, Profile cut-off machine, platform/oblique compound saw etc., and below in conjunction with the typical products of cutting machine, diagonal cutting saw is set forth creating conception of the present invention and advantage.

Usually diagonal cutting saw has an operating position, as shown in Figure 1; Correspondingly, diagonal cutting saw also has a position of rest, as shown in Figure 2.Diagonal cutting saw comprises pedestal 1, is positioned at the guardrail 20 on the pedestal 1, and guardrail 20 is used for to workpiece 21 location that are positioned on the pedestal 1, connected support member with pedestal 1, support member herein is a support 2, also can be carriage (slip diagonal cutting saw, not shown), be used for supporting saw 3.

Saw 3 comprises saw blade 31, saw blade axis 32, motor 33, decides guard shield 35 and movable shield 34, saw blade 31 is positioned on the saw blade axis 32, and can be around saw blade axis 32 rotations, saw blade axis 32 is driven by motor 33, on saw 3, also be provided with handle 22, be used for the operator and grip saw 3 and carry out work, on handle 22, be provided with the switch (not shown), be used for starting and disable motor 33.Decide guard shield 35 and be connected with motor 33 usually, in order to protect the part of blade teeth 311, movable shield 34 is positioned at decides guard shield 35, and movable shield 34 is hinged on decides on the guard shield 35, and movable shield 34 can be decided guard shield 35 relatively and be rotated.Movable shield 34 is connected with the movable shield drive unit, is used for opening fast and shutting movable shield 34.The movable shield drive unit includes connector, and connector herein is a connecting rod 4, and this connector also can adopt other rigidity or flexible element to substitute certainly.The inboard of movable shield 34 is connected by second pin 17 with connecting rod 4, and second pin 17 be arranged in parallel with saw blade axis 32.Connecting rod 4 is provided with groove 13, the second pins 17 and is arranged in groove 13, and can slide in groove 13, and groove 13 has been arranged to certain-length, manual unlocking movable shield 34 when making things convenient for saw 3 not pivot.

Support 2 is connected by pivot 7 with saw 3, makes saw 3 to pivot between operating position and position of rest around pivot 7.Pivot 7 can be wholely set with saw 3 or support 2.First gear 5 and pivot 7 coaxial settings, first gear 5 with decide guard shield 35 and fixedly connected, on support 2, also be provided with first pin 16, the first pins 16 parallel and be used for fixing second gear 6 with pivot 7, make that second gear 6 can be around 16 rotations of first pin.The other end of second gear 6 and connecting rod 4 is connected at first tie point 8 by the 3rd pin 18, and the other end of connecting rod 4 is provided with hole 11, the three pins 18 and is arranged in hole 11, makes that connecting rod 4 can be around 18 rotations of the 3rd pin.First pin 16 herein, second pin 17, the 3rd pin 18, saw blade axis 32, pivot 7 all be arranged in parallel.

As shown in Figure 3, change saw blade 31 for convenience, connecting rod 4 is between saw blade 31 and motor 33.

Interfere for the connecting portion that prevents connecting rod 4 and motor 33 and saw blade 31, connecting rod 4 herein is arranged to the bending of an arc, and flexibility is decided on the connecting portion size of motor 33 and saw blade 31.

When with saw 3 when position of rest is transformed into the operating position, pivot 7 turns clockwise, driving first gear 5 turns clockwise, be rotated counterclockwise with second gear 6 of first gear, 5 engagements, drivening rod 4 hauls movable shield 34 and is rotated counterclockwise, thereby movable shield 34 is opened, exposed blade teeth 311, so that cut workpiece 21.When saw 3 when the operating position is transformed into position of rest, pivot 7 is rotated counterclockwise, driving first gear 5 is rotated counterclockwise, turn clockwise with second gear 6 of first gear, 5 engagements, drivening rod 4 is pushing away movable shield 34 and is turning clockwise, thereby movable shield 34 is shut, protect blade teeth 311, to satisfy safety standard.In order to open and shut movable shield 34 fast, the diameter of first gear 5 is bigger than second gear 6, and can be connected degree with the off-centre of the movable shield 34 and second gear 6 by connecting rod 4, also promptly control the distance between the 3rd pin 18 and first pin 16, second pin 17 and the saw blade axis 32, thus the speed that control movable shield 34 is opened.

As shown in Figure 4 and Figure 5, in the second embodiment of the present invention, first gear 5 is fixed on by the 4th pin 19 to be decided on the guard shield 35, second gear 6 is fixedlyed connected with movable shield 34, and second gear 6 and movable shield 34 coaxial settings, make that the pivot of second gear 6 and movable shield 34 is identical, can certainly omit off-centre.By cog belt 9 engagement, certainly, also can adopt silent chain to mesh between first gear 5 and second gear 6, make the equidirectional rotation of two gears.Connecting rod 4 one ends are connected on the support 2 by the 3rd pin 18, and connecting rod is provided with hole 11, the three pins 18 and is arranged in hole 11.The other end of connecting rod 4 is provided with groove 13, and the other end of connecting rod 4 is connected at second tie point, 12 places with first gear 5, and second tie point 12 is positioned at the other end of connecting rod 4, is provided with the groove 13 that second pin, 17, the second pins 17 are arranged in connecting rod on first gear 5.Groove 13 can be provided with equally certain-length.

Pivot 7 and the 4th pin 19 are positioned at the homonymy of connecting rod 4.As Fig. 4, when pivot 7 and the 4th pin 19 are positioned at the left side of connecting rod 4, be transformed into the process of operating position from position of rest at saw 3, connecting rod 4 promotes first gear 5 and is rotated counterclockwise, thereby, be rotated counterclockwise with second gear 6 of first gear, 5 engagements, drive movable shield 34 and open clockwise.As Fig. 5, when pivot 7 and the 4th pin 19 are positioned at the right side of connecting rod 4, be transformed into the process of operating position from position of rest at saw 3, connecting rod 4 pullings first gear 5 is rotated counterclockwise, thereby, be rotated counterclockwise with second gear 6 of first gear, 5 engagements, drive movable shield 34 and open clockwise.

As shown in Figure 6 and Figure 7, first gear 5 and second gear 6 can by be positioned at the external gear engagement of deciding the 3rd gear 10 on the guard shield 35, also can realize the equidirectional rotation of first gear 5 and second gear 6 by the engagement of the internal gear between first gear 5 and second gear 6.

Certainly, as shown in Figure 5, it is external that design of the present invention is suitable for movable shield 34 equally, and at this moment, the position of connecting rod 4 is not limited between saw blade 31 and motor 33, can be positioned at the opposite side of saw blade 31.And at this moment, movable shield 34 can be with to decide guard shield 35 hinged, promptly movable shield 34 needn't with saw blade 31 coaxial installations.

Claims

1. cutting machine, comprise pedestal (1), the support member that connects with described pedestal (1), the saw (3) that is connected by pivot (7) with described support member, described saw (3) can pivot around described pivot (7), described saw (3) comprises saw blade axis (32), can be around the saw blade (31) of saw blade axis (32) rotation, drive the motor (33) of described saw blade axis (32), decide guard shield (35) and decide the matched movable shield (34) of guard shield (35) with described motor (33) connects with described, the movable shield drive unit that links to each other with movable shield (34), it is characterized in that, described movable shield drive unit comprises at least one connector, and the gear assembly of being made up of two gears at least that links to each other with an end of described connector.

2. cutting machine as claimed in claim 1 is characterized in that, described connector is connecting rod (4).

3. cutting machine as claimed in claim 1, it is characterized in that, the other end of described connector is connected with described movable shield (34), described gear assembly comprise be fixed on decide guard shield (35) and first gear (5) the coaxial setting of pivot (7) and with second gear (6) of described first gear (5) external gear engagement, an end of described connector is connected with described second gear (6).

4. cutting machine as claimed in claim 3 is characterized in that, described second gear (6) is connected at first tie point (8) with described support member, in the vertical direction, and described first tie point (8) is positioned at the top of described pivot (7).

5. cutting machine as claimed in claim 1 is characterized in that, the other end of described connector is connected with described support member, and described gear assembly is connected with described saw (3).

6. cutting machine as claimed in claim 5 is characterized in that, described gear assembly comprises and is positioned at described second gear (6) that is positioned at movable shield (34) of deciding first gear (5) on the guard shield (35) and cooperating with described first gear (5).

7. cutting machine as claimed in claim 6 is characterized in that, meshes by cog belt or silent chain between described first gear (5) and described second gear (6).

8. cutting machine as claimed in claim 6 is characterized in that, described first gear (5) and described second gear (6) are by being positioned at the 3rd gear (10) the external gear engagement of deciding on the guard shield (35) mutually.

9. cutting machine as claimed in claim 6 is characterized in that, described first gear (5) is the internal gear engagement with described second gear (6).

10. as claim 3 or 6 described cutting machines, it is characterized in that described first gear (5) diameter is greater than described second gear (6) diameter.