CN101987380A

CN101987380A - Desktop tool

Info

Publication number: CN101987380A
Application number: CN2009101836217A
Authority: CN
Inventors: 格雷厄姆·格哈德; 沃伦·布朗; 哈利·索默
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2011-03-23

Abstract

The invention discloses a desktop tool. The desktop tool comprises a workbench and a saw mechanism which is connected with the workbench, wherein the saw mechanism comprises a motor, a saw blade and a drive mechanism; the saw blade is driven to rotate by the motor; the drive mechanism comprises a first gear, a second gear, a third gear, a fourth gear and an intermediate shaft, wherein the first gear is arranged on the shaft of the motor; the second gear is engaged with the first gear; the third gear is arranged on the shaft of the saw blade; the fourth gear is engaged with the third gear; and the projection of the first gear and the projection of the third gear on a base plane are positioned on the same side of the axial line of the intermediate shaft. In such a way, the shell of the motor is intersected with the plane of the saw blade, so that the motor and the shell of the motor are closer to the saw blade; the overall width of the shell of the motor and a fixed protective cover is reduced; and interference between the shell of the motor and a guardrail or a base is prevented. Moreover, the motor and the shell of the motor are closer to the saw blade, so that the structure is more compact; therefore, a better field of view is provided for an operator.

Description

Table tool

Technical field

The present invention relates to a kind of table tool, especially a kind of diagonal cutting saw.

Background technology

Table tool is that a kind of motor-driven saw blade that utilizes rotates, thereby is used for the machinery of sawing workpieces, and it generally comprises diagonal cutting saw, bench saw or the like.Traditional diagonal cutting saw comprise be used for place work piece base, connect at the bracing frame on the base and connect saw on bracing frame, wherein bracing frame drives saw and can do inclined cut with respect to the upright position, and owing to motor in traditional diagonal cutting saw is horizontally disposed with, bracing frame can only move to lopsidedness with respect to the upright position like this, otherwise can make motor shell and guardrail or base produce interferes, so traditional diagonal cutting saw generally can only be tilted to the left cut workpiece, its maximum inclination angle is about 45 degree.And this diagonal cutting saw is owing to can only realize unidirectional left side cutting, so at needs to the right during inclined cut, workpiece can only be turned, utilize the left side swing to realize, use very inconvenient, thereby limited the scope of application of diagonal cutting saw greatly, can't satisfy different users's requirement.In actual mechanical process, also increased operator's labour intensity, reduced operating efficiency simultaneously.

To this, those skilled in the art have done corresponding improvement, disclosed a kind of diagonal cutting saw as U.S. Patent application US2006/0101967 number, this diagonal cutting saw comprises that workbench and pivot are connected the saw on the workbench, wherein saw comprises motor and the saw blade that is driven by the motor rotation, and motor vertically is arranged on the right side of saw blade, produces interference to reduce motor shell and guardrail or base, thereby realizes the double pendulum cutting.And motor is arranged on the right side of saw blade, can cover in the part workpiece on saw blade right side, thereby has influenced operator's field of view; And because the motor weight maximum in the saw, so the center of gravity of whole saw is near motor, and the close saw blade axis setting of motor in this diagonal cutting saw, so just make that the center of gravity of saw is forward, that is to say that the vertical range between the pivotal axis of the center of gravity of saw and saw is far away, the arm of force increases like this, has influenced resetting of saw.

Summary of the invention

The technical problem to be solved in the present invention: a kind of compact conformation is provided, has the table tool of better field of view.

The technical solution adopted for the present invention to solve the technical problems: a kind of table tool, comprise workbench, with the saw that is connected on the workbench, described saw comprises motor, motor drive shaft by the motor driving, saw blade axis, be installed in the saw blade on the saw blade axis, and be arranged on transmission mechanism between saw blade axis and the motor drive shaft, wherein motor drives the saw blade rotation by transmission mechanism, described saw blade has the saw blade plane, described transmission mechanism comprises first gear that is arranged on the described motor drive shaft, with with second gear of first gears engaged, be arranged on the 3rd gear on the described saw blade axis, with with the 4th gear of the 3rd gears engaged, and jackshaft, wherein second, the 4th gear is separately positioned on the described jackshaft, described jackshaft has the jackshaft axis, and described jackshaft axis is positioned at the datum plane perpendicular to the saw blade plane, and described first gear and described the 3rd gear are positioned at the same side of described jackshaft axis in the projection of datum plane.

Preferably, described first gear and described the 3rd gear are positioned at described jackshaft axis the same side near described saw blade plane in the projection of datum plane.

Preferably, described first, second gear is a roller gear.So, described jackshaft is provided with respect to described saw blade plane parallel.

Certainly, described first, second gear also can be a conical gear.So, described jackshaft is obliquely installed with respect to described saw blade plane.

Described the 3rd, the 4th gear is a conical gear.

Certainly, described the 3rd, the 4th gear also can be a hypoid gear.

Described first gear has near first end face of described motor and second end face that is oppositely arranged, and wherein said second end face is not less than the radius of saw blade to the minimum range of saw blade axis.Thereby increased the space between motor and the base, thereby can design high efficiency dust collect plant arbitrarily.

Described motor is rotatable to be arranged in the motor shell, described motor shell and described saw blade Plane intersects, thus reduce motor shell and secure shroud integral width.

Compared with prior art, beneficial effect of the present invention: the same side that first gear and the 3rd gear is positioned at the jackshaft axis is provided with, so motor drive shaft arrives the distance on saw blade plane less than jackshaft to the distance on saw blade plane, thereby make saw do left and right banking motion, realize the double pendulum cutting with respect to the upright position; And structure is compact, has better field of view.Add first gear that is arranged on motor drive shaft away from saw blade axis, that is to say motor backward near the pivotal axis of saw, so the center of gravity of saw and the vertical range between the pivotal axis shorten, and the arm of force shortens like this, has improved the reset capability of saw.

Description of drawings

Below in conjunction with accompanying drawing concrete elaboration is carried out in preferred embodiment of the present invention.

Fig. 1 is the right view of diagonal cutting saw, and this moment, diagonal cutting saw was in the operating position.

Fig. 2 is the right view of diagonal cutting saw, and this moment, diagonal cutting saw was in position of rest.

Fig. 3 be among Fig. 1 along A-A line part cut-away view, motor drive shaft and jackshaft all were parallel to the saw blade plane and were provided with this moment.

Fig. 4 be among Fig. 1 along A-A line part cut-away view, motor drive shaft was parallel to saw and levied the plane and be provided with this moment; Jackshaft is obliquely installed with respect to the saw blade plane.

Fig. 5 be among Fig. 1 along A-A line part cut-away view, jackshaft was parallel to saw and levied the plane and be provided with this moment; Motor drive shaft is obliquely installed with respect to the saw blade plane.

Wherein:

1. base 2. workbench 20. retaining mechanisms

21. table surface 3. saws 30. pivotal axis

31. saw blade 311. saw blade axis 312. saw blade axis axis

32. motor shell 33. motors 331. motor drive shafts

332. motor drive shaft axis 34. secure shroud 341. host cavities

35. movable shield 36. handles 4. bracing frames

41. pivot 5. transmission mechanisms 51. first order reducing gears

511. first gear, 512. second gears, 52. second level reducing gears

521. the 3rd gear 522. the 4th gear 53. jackshafts

531. jackshaft axis

The specific embodiment

Below just with most preferred embodiment, creating conception of the present invention is described.

Table tool has generally comprised diagonal cutting saw, slip diagonal cutting saw, bench saw or the like, and below in conjunction with the typical products in the table tool, 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 base 1, pivot connect at the workbench on the base 12, pivoting to connect at the bracing frame on the workbench 24 and pivot connects saw 3 on bracing frame 4, wherein bracing frame 4 is by pivot 41 pivotable being arranged on the workbench 2, saw 3 is by pivotal axis 30 pivotable being arranged on the bracing frame 4, thereby makes saw 3 to pivot between operating position and position of rest around pivotal axis 30.Pivotal axis 30 also is arranged with torsion spring (not shown) as the pivotal axis of saw 3 on it, the operator presses down saw 3 and makes its pivot like this, then compress the torsion spring cut workpiece, and behind the well cutting workpiece, saw 3 resets fast under the effect of torsion spring.In description, unless otherwise noted, the direction term as left, right, front and rear, upper and lower etc., all is the direction with respect to normal this diagonal cutting saw of use.

Base 1 has the front side of close operator's operation and the rear side that is oppositely arranged with the front side, and is arranged with guardrail 11 on this base 1, and this guardrail 11 is mainly used in the vertical direction against workpiece, is convenient to cut workpiece.Workbench 2 rotatable being arranged on the base 1 are provided with between workbench 2 and base 1 workbench 2 are locked at retaining mechanism 20 on the base 1.Workbench 20 has the table surface 21 of horizontal direction upper support workpiece.

Bracing frame 4 is by pivot 41 pivotable being connected on the workbench 2, thereby make this bracing frame 4 can drive saw componet 3 and rotate the certain angle cut workpiece with respect to workbench 2 at clockwise and counterclockwise both direction around this pivot 41, that is to say that saw componet 3 can tilt to realize the double pendulum cutting to the left and right sides with respect to workbench 2, the operator can adjust the angle of this saw componet 3 as required voluntarily, and then with different angle inclined cut workpiece.

Saw 3 comprises saw blade 31, reaches the motor 33, secure shroud 34 and the movable shield 35 that drive saw blade 31 rotations, motor 33 rotatable being arranged in the motor shell 32 wherein, secure shroud 34 is connected with motor shell 32, in order to covering in part saw blade 31, and secure shroud 34 also is provided with the host cavity 341 of accommodating motor shell 32; Movable shield 35 is hinged on the secure shroud 34, be used at non-cutting position, cover in remaining saw blade 31, and movable shield 35 can be rotated by relative fixed guard shield 34, be used for cut workpiece to expose saw blade 31, movable shield 35 is connected with movable shield drive unit (not shown), is used for opening fast and shutting movable shield.Also be provided with handle 36 on saw 3, this handle 36 is used for the operator and grips saw 3 and carry out work, is provided with switch (not shown) on handle 36, is used for starting and closing motor 33.Secure shroud 34 is rotatably connected with bracing frame 4 by pivotal axis 30, thereby operating grip 36 just can make saw 3 upper and lower pivots come cutting work.

As shown in Figure 3, saw blade 31 has the saw blade plane and connects on saw blade axis 311, because saw blade 31 has certain thickness, therefore saw blade 31 is idealized when thinking that its thickness is minimum, the plane at saw blade 31 places promptly is the saw blade plane, and saw blade axis 311 has saw blade axis axis 312; Motor 33 fore-and-aft direction settings, and motor shell 32 and saw blade Plane intersects; The motor drive shaft 331 that is driven by motor 33 has motor drive shaft axis 332.Diagonal cutting saw has also defined one and has passed saw blade axis 311 and the mid-plane (not shown) parallel with table surface 21, referring to shown in Figure 1, diagonal cutting saw is in the operating position, and motor 33 is with respect to the mid-plane setting that is inclined upwardly, certainly, this motor 33 also can vertically be provided with respect to base 1.As shown in Figure 2, diagonal cutting saw is in position of rest, and motor 33 is with respect to the downward-sloping setting of mid-plane.

Again referring to shown in Figure 3, saw 3 comprises also and is arranged on transmission mechanism 5 between saw blade axis 311 and the motor drive shaft 331 that motor 33 drives saw blade 31 rotations by this transmission mechanism 5.This transmission mechanism 5 comprises first order reducing gear 51, second level reducing gear 52 and the jackshaft 53 that is used to connect this first, second

grade reducing gear

51,52, wherein jackshaft 53 has first end that connects with motor drive shaft 331 and second end that connects with saw blade axis 311, and has jackshaft axis 531.Jackshaft axis 531 is positioned at the datum plane perpendicular to the saw blade plane.

In the present embodiment, first order reducing gear 51 is roller gear groups, comprise first gear 511 that is arranged on the motor drive shaft 331 and second gear 512 that meshes with first gear 511, wherein second gear 512 is arranged on first end of jackshaft 53, and first, second gear the 511, the 512nd, roller gear.So, jackshaft 53 and motor drive shaft 331 and saw blade plane parallel, and motor drive shaft 331 is not more than the distance of jackshaft 53 to the saw blade plane to the distance on saw blade plane, that is to say that motor drive shaft axis 332 is less than or equal to the distance of jackshaft axis 531 to the saw blade plane to the distance on saw blade plane, here, motor drive shaft 331 and jackshaft 53 all are axis in its physical length and the distance between the saw blade plane to the distance on saw blade plane.So, motor shell 32 and saw blade Plane intersects, thereby motor 33 and motor shell 32 more close saw blades 31, thus make structure compact.

First gear 511 that is arranged on the motor drive shaft 331 is provided with away from saw blade axis 331, first gear 511 has first end face of close motor 33 and second end face that is oppositely arranged, and wherein second end face is not less than the radius of saw blade to the minimum range of the saw blade axis axis 312 of saw blade axis 311.Simultaneously, the length of jackshaft 53 (referring to the jackshaft physical length) is not less than the radius of saw blade 31, so make motor shell 32 (as depicted in figs. 1 and 2) to be set away from base 1, increased the space between motor shell 32 and the base 1, so dust collect plant can be set easily, thereby improve dust catching efficiency.And make motor 33 be provided with near the pivotal axis 30 of saw 3 backward, and so the center of gravity of saw 3 and the vertical range between the pivotal axis 30 shorten, and the arm of force shortens like this, has improved the reset capability of saw 3.

Second level reducing gear 52 is conical gear groups, comprise the 3rd gear 521 that is arranged on the saw blade axis 311 and the 4th gear 522 that meshes with the 3rd gear 521, wherein the 4th gear 522 is arranged on the other end of jackshaft 53, three, the 4th gear the 521, the 522nd, conical gear and be 90 degree conical gears, vertical saw blade axis 311 settings of countershaft 53 in this.Certainly, as well known to those of ordinary skill in the art, can utilize the tapering of conical gear to change angle between jackshaft 53 and the saw blade axis 311.

Certainly, this second level reducing gear 52 can be the hypoid gear wheels also, that is to say the 3rd, the 4th gear the 521, the 522nd, hypoid gear.Owing to utilize hypoid gear as transmission mechanism, make when cutting work, can well reduce noise, and stable drive, can improve cutting accuracy.

Referring to Fig. 3, be arranged on first gear 511 on the motor drive shaft 331 and the 3rd gear 521 that is arranged on the saw blade axis 331 and be positioned at the same side of jackshaft axis 531, and be positioned at jackshaft axis 531 the same side again near the saw blade plane in the projection of datum plane.So make motor drive shaft 331 be less than or equal to the distance of jackshaft 53 to the saw blade plane to the distance on saw blade plane, motor shell 32 and saw blade Plane intersects, and make motor 33 and motor shell 32 more close saw blades 31, like this, can reduce motor shell 32 and the integral width of secure shroud 34 on left and right direction, prevent that motor shell 32 and guardrail 11 or base 1 from producing interference.Thereby saw 3 can be realized left and right 45 degree bilateral swings, even hunting range can arrive about 50 degree.And motor 33 can so provide better field of view for the operator so that structure is compact with motor shell 32 more close saw blades 31.

To shown in Figure 5, first order reducing gear 51 also can be the conical gear group among the present invention as Fig. 4, and it can realize purpose of the present invention equally.Be installed in this first order reducing gear 51 first gear 511 on the motor drive shaft 331, and with second gear 512 that first gear 511 meshes are conical gears.So, utilize the tapering of conical gear can change jackshaft 53 and motor drive shaft 331 angle with respect to the saw blade plane.

As shown in Figure 4, jackshaft 53 is obliquely installed with respect to the saw blade plane, and motor drive shaft 331 is parallel to the saw blade plane, and just jackshaft 53 has certain included angle with motor drive shaft 331, and this angle is an acute angle.Same this motor drive shaft 331 is near the saw blade setting, distance between itself and the saw blade plane is not more than the minimum range of jackshaft 53 to the saw blade plane, here, motor drive shaft 331 and jackshaft 53 all are axis in its physical length and the distance between the saw blade plane to the distance on saw blade plane.

And second level reducing gear 52 is conical gear groups, and wherein the 3rd, the 4th gear 521,522 is not 90 degree conical gears, jackshaft 53 and saw blade axis 311 and non-perpendicular setting.

As shown in Figure 5, jackshaft 53 is provided with respect to the saw blade plane parallel, and motor drive shaft 331 is obliquely installed with respect to the saw blade plane, and just jackshaft 53 has certain included angle with motor drive shaft 331, and this angle is an acute angle.Same this motor drive shaft 331 is near the saw blade setting, minimum range between itself and the saw blade plane is not more than the distance of jackshaft 53 to the saw blade plane, here, motor drive shaft 331 and jackshaft 53 all are axis in its physical length and the distance between the saw blade plane to the distance on saw blade plane.

And second level reducing gear 52 is conical gear groups, and wherein the 3rd, the 4th gear 521,522 is 90 degree conical gears, jackshaft 53 and saw blade axis 311 vertical settings.

Certainly, can also motor drive shaft 331 and jackshaft 53 be arranged in parallel, but be obliquely installed according to the conical gear of different taperings in the transmission mechanism 5, or motor drive shaft 331 is not parallel with jackshaft 53, also all is obliquely installed with respect to the saw blade plane with respect to the saw blade plane.But, no matter first order reducing gear 51 is roller gear level or conical gear group, second level reducing gear 52 is conical gear group or hypoid gear level, first gear 511 that wherein is arranged on the motor drive shaft 331 all is positioned at the same side of jackshaft axis 531 with the 3rd projection of gear 521 on datum plane that is arranged on the saw blade axis 331, and is the same side near the saw blade plane.And the distance between motor drive shaft 331 and the saw blade plane less than jackshaft 53 to the distance between the saw blade plane, so make motor shell 32 can with the saw blade Plane intersects, and make motor and motor shell 32 more close saw blades 31, reduce the integral width of motor shell 32 and secure shroud 34, prevented that motor shell 32 and guardrail 11 or base 1 from producing interference.Thereby saw 3 can be realized left and right 45 degree bilateral swings, even hunting range can arrive about 50 degree.And motor and motor shell 32 more close saw blades 31 can so provide better field of view for the operator so that structure is compact.

The above embodiments only are the most preferred embodiments that provides in order to allow those skilled in the art understand the present invention.The present invention is not limited in above-mentioned specific embodiment.Any those skilled in the art easily full of beard and improvement all within inventive concept of the present invention.

Claims

1. table tool, comprise workbench, with the saw that is connected on the workbench, described saw comprises motor, motor drive shaft by the motor driving, saw blade axis, be installed in the saw blade on the saw blade axis, and be arranged on transmission mechanism between saw blade axis and the motor drive shaft, wherein motor drives the saw blade rotation by transmission mechanism, described saw blade has the saw blade plane, described transmission mechanism comprises first gear that is arranged on the described motor drive shaft, with with second gear of first gears engaged, be arranged on the 3rd gear on the described saw blade axis, with with the 4th gear of the 3rd gears engaged, and jackshaft, wherein second, the 4th gear is separately positioned on the described jackshaft, described jackshaft has the jackshaft axis, and described jackshaft axis is positioned at the datum plane perpendicular to the saw blade plane, it is characterized in that: described first gear and described the 3rd gear are positioned at the same side of described jackshaft axis in the projection of datum plane.

2. table tool according to claim 1 is characterized in that: described first gear and described the 3rd gear are positioned at described jackshaft axis the same side near described saw blade plane in the projection of datum plane.

3. table tool according to claim 1 is characterized in that: described first, second gear is a roller gear.

4. table tool according to claim 3 is characterized in that: described jackshaft is provided with respect to described saw blade plane parallel.

5. table tool according to claim 1 is characterized in that: described first, second gear is a conical gear.

6. table tool according to claim 5 is characterized in that: described jackshaft is obliquely installed with respect to described saw blade plane.

7. table tool according to claim 1 is characterized in that: described the 3rd, the 4th gear is a conical gear.

8. table tool according to claim 1 is characterized in that: described the 3rd, the 4th gear is a hypoid gear.

9. table tool according to claim 1 is characterized in that: described first gear has near first end face of described motor and second end face that is oppositely arranged, and wherein said second end face is not less than the radius of saw blade to the minimum range of saw blade axis.

10. table tool according to claim 1 is characterized in that: described motor is rotatable to be arranged in the motor shell, described motor shell and described saw blade Plane intersects.