TW200412268A - Dual-saw-blade rotating structure rotating in opposite directions for a circular blade - Google Patents

Abstract

This invention relates to a dual-saw-blade rotating structure rotating in opposite directions for a circular blade. A transmission shaft provided in a housing connects a bevel gear to a straight bevel gear, which bends the driving axis for 90 degrees, and a follower shaft is provided on the axis. The follower shaft drives a planetary gear device. A first circular saw blade is mounted to an outer gearwheel of the planetary gear such that the first circular blade rotates in a direction opposite to the follower shaft. A second circular saw blade is mounted to an end of the follower shaft, whereby serration of the two circular saw blades are of opposite directions to each other and are rotated in opposite directions to perform cutting operation. Rotating the saw blades in opposite directions help removing fell at the cutting edges without generating sparks in cutting metal materials.

Description

200412268 'V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a rotary structure of an electric circular saw machine, especially a circular saw blade with positive and negative saw teeth on the same shaft, and two The circular saw blade rotates in opposite directions to cut the structure of the workpiece. [Prior art] As shown in the first figure, the rotating structure of the conventional conventional circular saw is mainly a housing 10 ', and a driving shaft 20' for providing power and a bevel gear connected thereto are provided therein. 21 ', the bevel gear 21' meshes with the helical helical gear 30 ', so that its power axis turns at a right angle. The spur gear 30 'is pivotally provided with a stepped shaft 50' through which a needle bearing 4 0 'is sleeved, so that the stepped shaft 50' and the spur gear 30 'are rotated synchronously, and the stepped shaft 50' After the upper diameter end is inserted into the circular saw blade 60 ', the pad 70' is used as the substrate, and then the bottom of the fixing block 80 'is screwed into the inner screw hole 5 1' of the end of the stepped shaft 5 0 '. The circular saw blade 6 0 ′ is pressed and fixed. However, the conventional rotating structure only needs to be equipped with a circular saw blade, and a circular saw blade is a one-way blade. When rotating and cutting, the one-way blade enters the cutting line in a forward direction with the cutting line. When turning to the blade and leaving the cutting line, it is in the reverse direction. At this time, it is easy to cause a cutting burr on the cutting line, which requires secondary processing to smooth it. And when cutting the circular saw blade, especially when cutting metal workpieces, the circular saw blade easily rubs with the workpiece to generate high temperature, and ignites sparks after the air enters. This ignition spark phenomenon causes the circular saw machine to be used in some specific applications in cutting. Occasional troubles, for example, if there is a flammable medium at the disaster relief site or when it is close to the human body, you cannot use a circular saw to open the iron door or the car door for rescue. [Summary of the Invention]

200412268 V. Description of Invention (2)

An object of the present invention is to provide a structure in which two circular saw blades with saw teeth in opposite directions can be installed on the same power axis, and the saw blades have different directions when rotated, and a set of designed planetary gear devices is added to the saw blade. To provide the structure of opposite rotation. By using the characteristics of different circular saw blades and different rotation directions during sawing, the blade can be cut forward when entering and leaving the cutting line during sawing to maintain the burr-free construction of the cutting line. And because the second saw blade of the present invention leaves only a small gap, the gap space will generate a severe torsional wind pressure when rotating in the opposite direction, forming a vacuum-like space. When cutting metal with a saw blade, the hot metal chips When passing through the gap space, there is no oxygen supply, so it cannot be burned. In addition, when metal chips pass through the gap space, the temperature will also drop sharply. Therefore, after the metal chips leave the space, the temperature will be insufficient. It cannot be ignited by flammable media without being threatening. [Embodiment] The preferred embodiment of the present invention will be described in detail with reference to the drawings as follows: First, please refer to the second figure. The double saw blade rotating structure of the circular saw of the present invention includes a mechanism for providing various components. An erected casing S is provided for spatial positioning of the following components; a transmission shaft 10 is rotated at an appropriate speed and torque to provide power. A bevel gear 11 fixed on

A spur gear 20 on the transmission shaft 10, which is perpendicular to the axis, resonates, and its shaft center can be inserted into the driven shaft 40. The helical helical gear 20 is driven by a bearing (not shown) provided by the housing S and meshed with a bevel gear 11 whose axis is vertical. A needle bearing 30 is arranged behind the helical gear 20 axis, and its outer diameter is fixed on the housing S, and one side of the inner diameter is available for planetary gears.

Page 6 200412268 V. Description of the invention (3) The wheel device 50 is embedded, and the inner diameter of the other side is embedded with an inner bearing 3 0 1 2 The axis of the inner diameter of the inner bearing 301 can be penetrated by the driven shaft 40 To provide lateral resistance of the driven sleeve 40. A driven shaft 40 is a stepped shaft, the bottom shaft body 401 penetrates into the needle bearing 30, the bearing 301 is centered with the shaft, and rotates synchronously with the straight tooth ^ oblique caster 20, and rotates synchronously; and The bottom shaft body 401 and f pass through the helical helical gear 20 and extend to a bearing 51 'fixed on the housing S. A wide straight tooth portion 402 is provided from the near top end of the shaft 40. A top shaft 403 is set above the tooth portion 402, and an inner screw hole > 404 is provided at the end of the top shaft 403. A planetary gear device 50 is sleeved on the driven shaft 40 by a sleeve 5 0 4 set in the center of a rotating frame 504. The rotating frame 504 is provided with a groove 5042 'for a pair of embedded bearings 5 The satellite gear 501 of 0 2 is symmetrical to the left and right and is provided with a fixed pin 503. The satellite gear 501 engages with the straight gear tooth portion 402 of the driven shaft 40, so that the two satellite gears 501 rotate and simultaneously drive the rotating frame 504 to rotate. An outer ring with an internal gear and an external gear 5 0 5 is arranged on the rotating frame 5 0 4 and meshed with two satellite gears 5 01. At the same time, the outer diameter of the outer large gear 505 is sleeved on the needle bearing 30 The inner diameter of the inner bearing 3001 and the outer diameter of the needle bearing 30 are fixed on the casing S, so that after the outer large wheel 5 5 is driven by the satellite gear 501, its rotation direction and rotation are also The frame 504 rotates in the same direction. A bearing 60 is sleeved on the top shaft 403 of the driven shaft 40 and the second section 'makes the end of the driven shaft 40 rotate to maintain the same axis; a mounting plate 70 is a plate body with a central hole for The driven shaft and bearing are provided with a convex post 7 2 which is slightly larger than the central hole 701. The convex post 702 is provided with external threads; the cover plate 7 0 is a disk surface and covers the planetary gear device 50 to the outer large gear 50 5 and screwed to the outer large gear 5 0 5

200412268 V. Description of the invention (4) Interlocking of wheel 505. An inner circular saw blade D1 can be sleeved and attached to the outer surface of the cover plate 70. An internal pressing fixing block 80 is provided with an internal thread, which can be screwed on the convex column 702 of the cover plate 70, and can press and fix the internal circular saw blade D1. An outer circular saw blade D2 is sleeved on the top shaft 403 end of the driven shaft 40 in a direction opposite to the saw teeth of the inner circular saw blade D1. An external compression fixing block 90 is provided with a screw 9 0 1 at the bottom, which can be screwed into the internal screw hole 4 0 4 on the top shaft 40 of the driven shaft 40 to fix the external saw blade by pressing. D 2. Continue to refer to the third and fourth figures. After the above components are sequentially combined, when the transmission shaft 10 rotates, the bevel gear 11 can be driven to rotate, and the helical helical gear 20 meshing with the transmission shaft 10 turns the axis into It is vertical and drives the driven shaft 40 connected to it to rotate. The driven shaft 40 is covered with a needle bearing 3 0 behind the helical helical gear 20, which can effectively offset the force generated when the circular saw blade is subjected to cutting force. Lateral stress; the driven shaft 40 is combined by its spur gear teeth 402 with two satellite gears 501 in the planetary gear device 50, and causes its outer large gear 505 to rotate in the opposite direction, and the outer large gear 5 0 5 presses and joins the cover disc 70, the inner circular saw blade D1 and the fixed inner circular saw blade D1 on the cover disc 70, and presses the fixing block 80 so that the inner circular saw blade D1 is in the same direction as the outer large gear 505 Rotate; another driven shaft 40 is mounted on one of the top shafts 403 of the straight tooth 402. A bearing 60 is also sleeved, and the outer circular saw blade D2 and the outer circular saw blade D2 are fixed on the top shaft 403. Block 90, the outer circular saw blade D2 and the driven shaft 40 are rotated in the same direction, so that the outer circular saw blade D2 and the inner circular saw blade D1 can be synchronized and rotated in opposite directions when rotating. By. To sum up, it is known that the double-saw blade reverse rotation structure of the circular saw machine invented in this case has industrial applicability, novelty, and advancement, which meets the requirements of the patent for invention. However, the above is only one preferred embodiment of the present invention.

200412268 V. Description of Invention (5) It is not intended to limit the scope of implementation of the present invention. That is, all equal changes and modifications made in accordance with the scope of the patent application for the present invention are covered by the scope of the patent for the invention.

IHRi Page 9 200412268 Brief description of the drawings The first diagram is a schematic cross-sectional view of the rotating structure of a saw blade of a conventional saw. The second figure is a three-dimensional exploded schematic view of the double-saw blade rotating structure of the circular saw of the present invention. The third figure is a schematic diagram of the transmission of the opposite rotation of the double-saw blade rotating structure of the circular saw of the present invention. The fourth figure is a schematic cross-sectional view of a double saw blade rotating structure of the circular saw of the present invention. Reference numbers in drawings [Learning section]

1 〇 'housing 2 0' drive shaft 2 Γ bevel gear 30 'spur gear 4 0' needle bearing 5 0 'step shaft 5 1' internal screw hole 60 'circular saw blade 7 0' pad 8 0 ' Fixed block

[Part of the invention] S housing S1 bearing

Page 10 200412268 Brief description of the drawings 1 〇 Drive shaft 1 1 Bevel gear 20 Spur gear 3 0 Needle bearing 3 0 1 Inner bearing 4 0 Drive shaft 4 0 1 Bottom shaft body 4 0 2 Straight tooth 4 0 3 Top shaft 4 0 4 Internal screw hole

5 0 Planetary gear device 5 0 1 Satellite gear 5 0 2 Bearing 5 0 3 Fixing pin 5 0 4 Turret 5041 Sleeve 5 0 4 2 Groove 5 0 5 Outer gear 5 0 6 Screw hole 6 0 Bearing

7 0 Cover plate 701 Center hole 7 0 2 Bump 7 0 3 Countersunk hole

Page 11 200412268 Brief description of the drawing 80 Internal pressure fixing block 90 External pressure fixing block 9 0 1 Screw D1 Inner circular saw blade D2 Outer circular saw blade

Claims (1)

200412268 VI. Patent application The double saw blade rotating structure of circular sawing machine includes: a housing to provide the erection of various components, and the housing is provided with a shaft hole for the driven shaft sleeve, and the shaft hole There is a bearing on it; a drive shaft that rotates at an appropriate speed and torque to provide power; a bevel gear fixed on the drive shaft and meshing with a straight helical gear that is perpendicular to the axis. The moving shaft is sleeved; a straight tooth helical gear is engaged by and driven by a bevel gear perpendicular to its axis after the bearing provided by the housing is positioned; a needle bearing is provided behind the axis of the spur gear The diameter is fixed on the housing, and the inner diameter of the shaft can be penetrated by the driven shaft to provide the lateral resistance of the driven shaft. One side of the bearing is sleeved by a planetary gear device, and the inner diameter of the bearing is The bottom end is provided with another inner bearing for the driven shaft sleeve; a driven shaft, which is a stepped shaft, the bottom shaft body penetrates into the shaft center of the inner bearing of the needle bearing and the spur gear, And extends to the bearing on the housing, the bottom shaft body and spur gear The sleeve part can be integrated with the helical helical gear to rotate synchronously. A wide section of the spur gear is provided near the top end, and a top shaft is set above the spur gear. The top shaft end is provided with a Internal screw hole; a planetary gear device, which is sleeved on the driven shaft by a sleeve set in the center of a turret. The turret is provided with a groove inside, which can be used for a pair of symmetrically pinned satellite gears. And the satellite gear meshes with the straight gear teeth of the driven shaft, so that the two satellite gears rotate and drive the turret to rotate at the same time, and then a large gear with an outer side of the internal gear is set on the outer ring of the rotator and is in phase with the two satellite gears At the same time, the outer diameter of the outer large gear is sleeved on the inner diameter of the inner bearing of the needle bearing, and the needle bearing is fixed on the housing, so the outer large gear Page 13 200412268 6. After the scope of patent application is driven by the satellite gear, its rotation direction also rotates in the same direction as the turret; a bearing is set on the second section of the top shaft of the driven shaft to keep the rotation of the driven shaft The same axis; a cover plate, a plate body, with a central hole for the driven shaft and the bearing to pass through, and a convex post slightly larger than the central hole, with external threads on the convex post; Covers the planetary gear device to the outer large gear, and is screwed to the outer large gear, which can be linked by the outer large gear; an internal circular saw blade can be sleeved and attached to the outer side of the cover plate; an internal pressure fixing block, It is provided with an internal thread, which can be screwed on the cover disc convex post, and can press and fix the internal circular saw blade; An outer circular saw blade is sleeved on the top shaft end of the driven shaft in the opposite direction of the saw teeth of the inner circular saw blade. An outer press-fitting fixing block is provided with a screw at the bottom and can be screwed into the inner shaft of the top shaft of the driven shaft. The screw hole is fixed with it, and the outer circular saw blade is fixed by pressing; By sequentially combining the above-mentioned components, when the transmission shaft rotates, the bevel gear can be driven to rotate, and the helical helical gear coupled with it can make the axis turn vertical and drive the driven shaft connected to it to rotate. The driven shaft is combined with the planetary gear device by its spur gear teeth, and the outer large gear is rotated in the opposite direction, and the outer large gear is engaged with the cover disk, the internal circular saw blade and the fixed internal circular saw. The inner circular saw blade is rotated in the same direction as the outer large gear by pressing the fixed block inside the cover plate; another top shaft of the driven shaft on the straight tooth is also sleeved with a bearing to engage the outer circle. The saw blade and the external pressure fixing block that fixes the outer circular saw blade on the top shaft, so that the outer circular saw blade and the driven shaft rotate in the same direction, so that the outer circular saw blade and the inner circular saw blade can be synchronized and different when rotating. To the rotator. Page 14