CN103302353B - Cutting device - Google Patents

Abstract

The invention provides a cutting device, a support unit for supporting the workpiece to be processed, the support unit has a first end and a second end, an auxiliary support, the auxiliary support is connected with the first end or the second end of the support unit The two ends are connected, and have a first position close to the first end or the second end and a second position away from the first end or the second end, the auxiliary support can move between the first position and the second position, and a locking device , the locking device is used to lock the auxiliary support at the first position, the second position or any position between the first position and the second position, the table top of the auxiliary support is flush with the table top of the support unit, and the auxiliary support is provided with a A stop device that limits one end of the workpiece. The invention improves the safety, operation convenience and the like of the cutting device.

Description

cutting device

technical field

The present invention relates to a cutting device and its relatives, more particularly, to a cutting device and its relatives with a cutting head pivotable between a raised position and a lowered position relative to a table.

Background technique

The cutting device of the present invention, whose cutting head can pivot between a raised position and a lowered position relative to the worktable, is usually a miter saw (including compound sliding miter saw), a cut-off saw and the like. A typical miter saw consists of a base, a table pivotally supported on the base about a vertical axis, a support arm attached to the rear of the turntable about a horizontal axis, and a support arm pivotally attached about an axis perpendicular to the horizontal axis. cutting head. A typical chop-off saw includes a table with a cutting head pivotally attached to the rear of the table about an axis.

Existing cutting devices of this type all have a handle, and the distance between the holding part and the saw blade is relatively large, and the operator is easy to accidentally place his hand between the holding part and the saw blade, causing accidental cuts. danger.

This cutting device usually also includes a movable guard connected to the fixed guard. When the cutting head pivots from the raised position to the lowered position, the movable guard gradually opens to expose the cutting portion of the saw blade. When the cutting head returns from the lowered position to When the position is raised, the movable shield is gradually closed. During the cutting operation, when the movable guard is opened, the cutting portion of the saw blade rotating at high speed is exposed within the reach of the operator, posing a potential safety problem.

Contents of the invention

The invention provides an improved cutting device, which improves the safety, operation convenience and the like of the cutting device.

To achieve the above object, the invention provides a cutting device, comprising:

a support unit for supporting the workpiece to be processed, the support unit has a first end and a second end,

An auxiliary support, the auxiliary support is connected to the first end or the second end of the support unit, and has a first position close to the first end or the second end and a second position away from the first end or the second end two positions, the auxiliary support is movable between the first position and the second position,

a locking device for locking the auxiliary support in the first position, the second position or any position between the first position and the second position,

The table top of the auxiliary support is flush with the table top of the support unit,

The auxiliary support is provided with a stopper for limiting one end of the workpiece.

Further features and advantages of the present invention will be explained in detail below.

Description of drawings

The present invention will be further elaborated below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a perspective view of the cutting device of the present invention;

Fig. 2 is a perspective view of another angle of the cutting device in Fig. 1;

Fig. 3 is the side view of the cutting head of the cutting device of the present invention when the movable shield is in a closed state;

Fig. 4 is a side view of the cutting head in Fig. 3 when the movable shield is in an open state;

Fig. 5 is a side view of the cutting device of the present invention provided with a clamping device;

Fig. 6 is a side view of the storage position of the clamping device in Fig. 5 when it is in a storage state after use;

Fig. 7 is a side view of the maximum height that the top end of the clamping device in Fig. 5 may protrude relative to the support surface when it is used to clamp a thick workpiece;

Fig. 8 is a side view of the minimum height that the top end of the clamping device in Fig. 5 may protrude relative to the support surface when it is used to clamp a thin workpiece;

Fig. 9 is a perspective view of the cutting device of the present invention provided with auxiliary supports, in which the cutting unit including the cutting head is not shown, and only the supporting unit part is shown;

Figure 10 is a perspective view of the auxiliary support in Figure 9;

Fig. 11 is a perspective view of the auxiliary support in Fig. 10 in another usage mode after being turned upside down;

Fig. 12 is a schematic diagram of the position of the auxiliary support relative to the support unit when it is in use in Fig. 11 .

detailed description

The present invention will be described below by taking the composite sliding miter saw as an example in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the compound sliding miter saw 1 includes a support unit 20 for supporting a workpiece to be cut and a cutting head 10 for cutting the workpiece, wherein the support unit 20 includes a base 201 and Y is rotatably mounted on the workbench 202 on the base 201, the workpiece support surface of the base and the workpiece support surface of the workbench are coplanar. The cutting head 10 is pivotably connected to a sliding assembly 203 around the first axis 11, and the sliding assembly 203 is slidably connected to the upper end of a support arm 204, and the lower end of the support arm 204 rotates around a horizontal axis X parallel to the workpiece supporting surface. It is pivotally connected to the rear end of the workbench 201 . The cutting head 10 is pivotable relative to the table about a first axis 11 perpendicular to the horizontal axis between a raised position and a lowered position, in which the saw blade is brought into contact with the workpiece for cutting operations.

The cutting head 10 comprises a saw blade 12 rotatably mounted on a saw blade shaft about a second axis 13 parallel to the first axis 11 , and a fixed guard 14 covering the upper half of the saw blade 12 . The saw blade 12 has a certain thickness and has two sides, wherein the planes of the two sides are perpendicular to the first axis 11 and the second axis 13 . Preferably, the power device is installed on the cutting head and connected to the saw blade shaft through a suitable transmission mechanism. The power source of the power device is preferably an electric motor or a small gasoline engine. In other embodiments, the power source can also be of other suitable types.

A handle 30 is arranged on the fixed shield 14, and can be installed on the fixed shield or integrally formed with the fixed shield. The handle 30 includes a holding portion 301 and two connecting portions 302 located above the front of the fixed shield. A first end of the connecting portion 302 is connected to the rear of the fixed shield 14 , and a second end thereof is respectively connected to two ends of the holding portion 301 . Two ends of a safety barrier 303 are respectively connected to the middle portion between the first end and the second end of the connecting portion 302 and are closer to the second end of the connecting portion. In this way, when the operator stands at the operating position in front of the miter saw, he must bypass the safety barrier 303 to contact the fixed guard 14, so setting the safety barrier 303 can effectively prevent people from accidentally touching it to the fixed shield 14.

When the first axis 11 is in the horizontal position, the grip portion is also horizontal and the distance from the grip portion to the second axis of the saw blade is greater than the distance from the safety fence to the second axis of the saw blade.

Further, the handle 30 also includes an auxiliary connection part 304 connected between the front part of the fixed shield and the holding part to increase the strength of the handle.

Fig. 3 and Fig. 4 have shown the schematic diagram that cutting head part is provided with warning device, and the cutting saw blade 12 of rotation is provided with upper fixed shield 14 and lower movable shield 15, and lower movable shield 15 is opposite fixed shield 14 Pivotably swinging back and forth, during cutting operation, as the cutting head 10 gradually descends and cuts into the workpiece, the lower movable shield 15 will gradually open, thereby exposing the cutting area 19 of the saw blade 12, and the cutting operation After completion, along with the lifting of the cutting head 12, the lower movable guard 15 will automatically pivot to the closed state along the direction shown by the arc arrow 16, but the movable guard 15 is not completely closed yet, and the saw blade 12 is still When rotating, it is very dangerous to touch the saw blade 12 by mistake. In order to warn the operator to avoid accidents, the present invention is provided with a warning device 17 on the lower movable shield 15. Preferably, the warning device 17 is easily identifiable by human eyes. Visibility, such as any one or any combination of warning color, warning symbol, warning text or warning light, etc., the warning color can be selected from red with a wavelength suitable for human eyes recognition; The cover 15 is close to the warning position 18 of the cutting area 19 where the saw blade 12 is exposed, because the rotating saw blade 12 firstly passes through the warning position 18 no matter whether it is retracted into the movable guard 15 or exposed from the movable guard 15. The warning device 17 is arranged on the warning part 18, and the warning effect is obvious and intuitive.

5 to 8 show a schematic diagram of a miter saw provided with a workpiece clamping device. The support unit 20 of the miter saw 1 also includes a grid 50, and the grid 50 has an abutment surface 51 perpendicular to the support table surface 21. During workpiece processing, the workpiece is placed on the support table 21 and its side is against the abutment surface 51. In order to make the workpiece be more firmly positioned on the support table 21 when being cut, the present invention provides a workpiece clamping device 40 , further, the clamping device 40 is installed on the support unit 20 so that it can move up and down relative to the support platform 21 of the support unit 20 .

The clamping device 40 mainly includes a clamping part 41 acting on the upper surface of the pressed workpiece, a connecting part 42 for connecting to the support unit 20 and a beam 43 placed between the clamping part 41 and the connecting part 42, and the connecting part 42 There is an axis 423 perpendicular to the support platform 21, the connecting member 42 has a maximum extension position and a minimum extension position along the direction of the axis 423, and at the maximum extension position, the upper end 422 of the connection member is at the farthest point relative to the support platform 21 In terms of distance, on the contrary, on the minimum extended position, the upper end 422 of the connecting piece is at the closest distance relative to the support table 21, and the connecting piece 42 can slide between the maximum extended position and the minimum extended position. The support unit 20 according to 1 is provided with a guide (not shown) for providing the connecting member 42 to slide thereon, the beam 43 has a first end and a second end, and its first end is rotatably connected to the connecting member. The upper end 422 and the second end thereof are screwed to the clamping member 41 , and the lower end of the clamping member 41 is provided with a cup-shaped or disc-shaped holding portion 411 .

The clamping device 40 also includes a locking device for locking the connecting piece 42 to the guide. The connecting piece 41 is a rod, and the guide is set as a hole through which the rod can pass. On the grid 50 or/and the base, the rod body of the connecting piece 42 is provided with a circular groove 421 , and a hook-shaped locking portion of a locking piece 44 fits into the circular groove 421 for locking.

The clamping device 40 can clamp workpieces of different thicknesses, and because its connecting piece 42 and clamping piece 41 are all adjustable in the direction perpendicular to the support table 21, the adjustable range is large, as shown in Figure 7, for clamping When the device 40 is used to clamp a thick workpiece, its top end may reach the maximum protruding height relative to the support table. At this time, the connecting piece 42 is in the maximum protruding position; When clamping a thin work piece, its topmost possible minimum protruding height relative to the support surface, at this moment, the bottom side of the crossbeam 43 is resisted by the upper end of the grid 50 . Compared with the prior art, the clamping device 40 of the present invention is provided with a storage position, so after the cutting operation is completed or when performing bevel cutting (during bevel cutting, the cutting unit with the cutting head is inclined relative to the support table, if At this time, the clamping device still has a very high position protruding from the table, which will easily hinder the inclination of the cutting unit, so that the correct cutting operation cannot be completed, and even accidents) there is no need to remove it from the cutting device, so there is no need to use it again Sometimes it is possible that the phenomenon of not being found occurs. The storage process is shown in Figure 5 and Figure 6. First, make the clamping part 41 cross the uppermost end of the fence 50, and turn it to the position behind the fence 50. , and then, the connecting member 42 is pressed down until it is in the minimum extended position, and the storage process is completed.

As shown in Figures 9 to 11, the miter saw 1 is also provided with an auxiliary support 60, the auxiliary support 60 is movably arranged on the left end of the base of the support unit 20, and can be engaged with the left end of the base in the direction shown by the arrow mark D Move between the first position and the second position away from the left end, the front and rear two slide bars 64 of the auxiliary support 60 fit in the holes on the base and can be locked by a locking device, wherein the locking device is a prior art, The present invention does not elaborate on them. The table top 61 of the auxiliary support 60 is flush with the support table 21 of the support unit 20, and the auxiliary support 60 is also provided with a stop device, which is especially suitable for batch processing of fixed-length workpieces. When the workpieces are placed on the support table 21, only the The left end of the workpiece abuts against the stopper at a predetermined position. The stopper device includes a stopper 62, which is slidably fitted in a groove 66 provided on the auxiliary table 61. The stopper 62 has an abutment plane perpendicular to the tabletop, and the abutment plane protrudes beyond the tabletop. The part on the top that abuts against one end of the workpiece is defined as the limit end. Of course, in the case where a stop device is not required, the limit end can also be placed under the table, and the other end of the stop member 62 opposite to the limit end An adjustable roller 65 is provided, and the stop device 60 also includes a lock 63 for locking the stop 62 at a certain position. A certain position can be interpreted as the maximum position where the limiting end protrudes above the table and Any position between the position where the limiting end is lower than the table top.

The auxiliary support 60 is detachably arranged on the base. When cutting a very long workpiece, see Figure 11, the auxiliary support 60 can be removed and placed at a position farther from the left end of the base and turned over. The main part of the auxiliary support It forms a triangular stable support with the slide bar, and one end of the workpiece is supported on the roller, which is beneficial to the feeding of the workpiece; the position and structural size relationship of the auxiliary support 60 relative to the support unit 20 in this use state are described in conjunction with Figure 12 , at this time, the auxiliary support is located at the third position, at this position, the slide bar 64 of the auxiliary support 60 is disengaged from the base 201 of the support unit 20, and the first fulcrum end 68 and the second fulcrum end 69 of the auxiliary support 60 are at On the same bottom surface as the bottom end 70 of the supporting unit, the upper end 67 of the auxiliary support 60 is flush with the supporting platform 21 .

The stopper 62 of the present invention is not limited to the shape and installation method in the above-mentioned embodiment. In other embodiments, as long as the stopper 62 has a height perpendicular to the table top and can be optionally placed protruding from the table top and lower than the table top. The stop end of the position is enough. For example, the stop member 62 is rotatably connected to the side of the auxiliary support. until the end stop is below the table.

The auxiliary support of the present invention is not limited to the case where it is placed at the left end of the base in the above-mentioned embodiments. In other embodiments, the auxiliary support can also be provided at the right end of the base, or the above-mentioned auxiliary supports are respectively provided at the left and right ends of the base. Depending on usage conditions.

Claims (5)

1. A cutting device comprising: a support unit for supporting the workpiece to be processed, the support unit has a first end and a second end, An auxiliary support, the auxiliary support is connected to the first end or the second end of the support unit, and has a first position close to the first end or the second end and a second position away from the first end or the second end two positions, the auxiliary support is movable between the first position and the second position, a locking device for locking the auxiliary support in the first position, the second position or any position between the first position and the second position, The table top of the auxiliary support is flush with the table top of the support unit, It is characterized in that: the auxiliary support is provided with a stopper for limiting one end of the workpiece, the stopper includes a stopper, the stopper has a limiter end, and the limiter The end is located on a plane perpendicular to the table surface of the auxiliary support, and the other end of the stopper opposite to the limit end is provided with an adjustable roller, The auxiliary support has a third position. In this position, the auxiliary support is detached from the support unit, forming a triangular stable support, and one end of the workpiece is supported on the roller. 2. The cutting device according to claim 1, wherein the limiting end can be selectively placed at an upper position higher than the table top of the auxiliary support or a lower position lower than the table top of the auxiliary support. Location. 3. The cutting device according to claim 2, wherein a groove is provided on the table surface of the auxiliary support, and the stopper is slidably fitted in the groove. 4. The cutting device according to any one of claims 2 to 3, wherein the stopper device further comprises a locking member for locking the stopper. 5. The cutting device according to claim 1, wherein the auxiliary support is detachably disposed on the first end or the second end.