TWI549767B - Round hole saw assembly - Google Patents

Description

Circular hole saw assembly

The present invention relates to a circular hole saw assembly which allows a drill rod to be quickly mounted to a circular hole saw and which can be quickly removed from the round hole saw. The drill pipe is usually assembled and fixed in the shaft hole of the circular hole saw, and can be applied to the circular hole saw of different diameters as the function of the axis positioning, so that the circular hole saw does not shift when rotating.

Conventional circular hole saw assembly, a number of patents are provided to allow a drill pipe to be quickly installed on a circular hole saw, and the drill pipe can be quickly removed from the circular hole saw. For example, the general circular hole saw quick release device is mostly For larger diameter circular hole saws (round hole saws with a diameter of 30 mm or more), in order to cooperate with high torque large diameter circular hole saws, such as US Pat. No. US8328474, the hole cutter 12 is assembled with an end plate 14, where The drive shank 24 has a body portion 26, the flat portion 25 of the body portion 26 is locked to the end plate 14, the pilot bit 64 is assembled to the A drive shank 24, and the body portion 26 is combined with the collar 50 as a device for the quick change pilot bit 64, quick The change device is assembled to the drive shank 24; and the quick change device has drive pins 36 assembled to the end plate 14 corresponding drive pin apertures 18; wherein the drive shank 24 provides the hole cutter 12 as the main drive shaft. This type of structure is not applicable to a circular hole saw having a hole diameter of 30 mm or less, because the width of the joint face of the circular hole saw having a hole diameter of 30 mm or less is not sufficient for providing the drive pins 36 (quick release device) for assembly.

And Canadian Patent No.: CA2283453, which is a circular hole saw for small apertures, but the structure reveals that the drill rod and an adapter can be axially actuated to remove debris attached to the circular hole saw and the drill pipe, the drill pipe It cannot be removed from the adapter, so when the drill pipe is damaged, it must be replaced together with the adapter; then the adapter is axially actuated and the drill is positioned in a radial rotation, but the spring is provided to withstand the adapter subsidy card. The function of the cymbal, when used for a long period of time, the spring may be elastic and fatigued and unable to provide the adapter to be positioned at the required position, which will cause the drill bit to move up and down due to the inability to effectively position, for practical operation Time is very dangerous because it may cause the bit to break and the opposite is not The method provides the circular hole saw as a function of positioning the axis.

To this end, the present invention is to improve the conventional disadvantages, reduce the sway offset of the drill pipe, and improve the assembly function of the faster drill bit and the circular hole saw; and the present invention is directed to a circular hole saw design with a diameter of 30 mm or less. With the quick release device.

The circular hole saw assembly of the present invention refers to a circular hole saw structure having a quick release drill pipe, which comprises a quick release device and a drill pipe mounted to the circular hole saw, and the present invention refers to a circular hole having a hole diameter of 30 mm or less. The saw has a one end surface and an open mouth, the open mouth is a circular hole shape, and one end surface is provided with a screw hole, wherein the drill rod is assembled in the quick release device, and has a drill bit and a handle portion. The handle extends to form a drill bit, and the handle portion is provided with a ring groove; the quick release device comprises a ring body, a sleeve body and a driving body, wherein the ring body is provided with a first end and a second end, and the second end has a hexagon a hole shape, the first end has a flange; the sleeve has an enlarged portion, the enlarged portion extends to form a first joint portion, the sleeve body has a shaft hole, the shaft hole extends axially from the enlarged portion to the first joint portion; The driving body has a second engaging portion, and the second engaging portion extends axially to form a blocking portion, and the blocking portion extends axially to form a hexagonal portion extending axially to form a threaded portion, the driving body having an assembling hole, the assembly The hole extends axially from the second joint to the threaded portion; the second joint is provided a plurality of bead holes, the hexagonal portion is sleeved with a spring; wherein the second engaging portion is sleeved into the first engaging portion, the blocking portion abuts the end edge of the first engaging portion; the sleeve combined driving body is repositioned In the ring body, the threaded portion protrudes out of the ring body, and the flange of the ring body will cover the enlarged portion of the sleeve body, thereby assembling the quick release device.

According to the above, the quick release device is directly screwed to the circular hole saw, and the drill pipe is directly slid into the quick release device, and the quick release device has a structure for unlocking and locking the drill bit, thereby the drill pipe is fast inserted The device is dismantled and allows the operator to quickly lock the drill pipe and release the drill pipe locking position. The user can quickly install the handle on the circular hole saw, and the drill pipe can quickly slide out of the quick release device to replace the new drill pipe. The handle is then locked to the circular hole saw so that the handle can be rotated in synchronism with the circular hole saw.

A‧‧‧ quick release device

1‧‧‧ ring body

11‧‧‧ Set of holes

12‧‧‧Flange

1a‧‧‧ first end

1b‧‧‧ second end

11a‧‧‧ hexagonal hole shape

111‧‧‧ 挡

2‧‧‧ Spring

3‧‧‧ Driver

31‧‧‧Assembled holes

32‧‧‧Second joint

321a‧‧‧Beacon

321b‧‧‧Beacon

33‧‧‧

34‧‧ ‧ hexagonal

35‧‧‧Threading Department

36a‧‧‧ beads

36b‧‧‧ beads

4‧‧‧ Socket

41‧‧‧Axis hole

42‧‧‧Expanding Department

43‧‧‧First joint

5‧‧‧Drill pipe

51‧‧‧ handle

52‧‧‧ drill bit

53‧‧‧ ring groove

6‧‧‧round hole saw

61‧‧‧ screw holes

The first figure is an exploded view of the present invention.

Figure 1-1 is a second end view of the ring body of the present invention.

The second drawing is an exploded view of the quick release device of the present invention.

The third figure is a combination diagram of the quick release device of the present invention.

The fourth figure is a combination diagram of the present invention.

The fifth drawing is a schematic diagram 1 of the implementation of the present invention.

The sixth drawing is a schematic diagram 2 of the implementation of the present invention.

In order to fully understand the present invention, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The statements in this specification are hereby implemented and are not intended to limit the technical scope of the invention.

The circular hole saw assembly of the present invention refers to a circular hole saw 6 structure having a quick release drill pipe 5, as shown in Figures 1 to 3, which includes a quick release device A mounted to the circular hole saw 6 and a drill pipe 5 having an end face and an open end, the open end being a circular hole-shaped open port, one end face being provided with a screw hole 61, wherein the drill pipe 5 is assembled to the quick release device A, The drill rod 5 has a drill bit 52 and a shank portion 51. The shank portion 51 is a hexagonal cylinder body extending axially to form a drill bit 52. The shank portion 51 is provided with a ring groove 53. As shown in the second figure, the quick release device A The ring body 1 is provided with a sleeve hole 11 , a first end 1 a and a second end 1 b , and the sleeve hole 11 is a hollow annular hole penetrating the ring body 1 . The sleeve hole 11 extends to the second end 1b to form a hexagonal hole shape 11a, as shown in FIG. 1-1, whereby the second end 1b forms a stopper 111, in other words, the hexagon The hole shape 11a is a hole shape slightly smaller than the circumferential inner diameter of the sleeve hole 11, so that the second end 1b forms a stopper portion 111 having a flange 12; the sleeve body 4 has an enlarged portion 42, the enlarged portion 42 extends to form a first joint portion 43 having a shaft hole 41 extending axially from the enlarged portion 42 to the first joint portion 43; the drive body 3 having a second joint portion 32, the second portion The engaging portion 32 extends axially to form a blocking portion 33. The blocking portion 33 extends axially to form a hexagonal portion 34. The hexagonal portion 34 extends axially to form a threaded portion 35. The driving body 3 has an assembling hole 31, and the assembling hole 31 is six. An angled shape extending axially from the second engaging portion 32 to the threaded portion 35; and the second engaging portion 32 is provided with one or more bead holes 321a, 321b, and the bead holes 321a, 321b are placed in a bead body 36a, 36b The hex portion 34 is sleeved into a spring 2, and the second engaging portion 32 is sleeved into the shaft hole 41 of the first engaging portion 43. The blocking portion 33 abuts the end edge of the first engaging portion 43. The body 4 is further disposed in the sleeve 11 of the ring body 1 , the enlarged portion 42 abuts against the edge wall of the first end 1 a thereof, and the threaded portion 35 protrudes out of the second end 1 b of the ring body 1 , The corner portion 34 is fitted to the hexagonal hole shape 11a of the ring body 1. The flange 12 of the ring body 1 is encased in the outer diameter of the enlarged portion 42 of the sleeve body 4, and can be axially at a limited distance from the outer diameter of the driving body 3. Displace and reset, thereby assembling into the quick release device A.

As shown in the fourth figure, the threaded portion 35 of the quick release device A is directly screwed to the screw hole 61 of the circular hole saw 6, and the drill rod 5 is directly slid into the quick release device A and assembled into a circular hole saw assembly. The quick release device A has the function of unlocking and locking the drill rod 5, and the drill rod 5 is slipped into the quick release device A and allows the operator to quickly lock the drill rod 5 and release the locking position of the drill rod 5, and the user can quickly install The handle portion 51 is in the circular hole saw 6, the handle portion 51 of the drill rod 5 can be quickly slid out of the quick release device to replace the new drill rod 5, and then the handle portion 51 is locked to the circular hole saw 6 by the quick release device A, so that The shank 51 is rotatable in synchronism with the circular hole saw 6.

The operation of the present invention is as shown in the fifth and sixth figures. First, the threaded portion 35 of the quick release device A is locked to the screw hole 61 of the circular hole saw 6, and the ring body 1 of the quick release device A is The axial displacement is performed at a finite distance, whereby the end edge of the first engaging portion 43 of the sleeve 4 is separated from the bead holes 321a, 321b, and the beads 36a, 36b in the bead holes 321a, 321b are not provided with the first engaging portion 43 at this time. Compressed to assume a floatable state, and then the handle 51 of the drill pipe 5 is inserted into the assembly of the quick release device A The hole 31 is slid into the threaded portion 35 and passed out to the outer end of the circular hole saw 6, until the ring groove 53 of the shank 51 is displaced to the position of the bead holes 321a, 321b, and then the ring body 1 is released. The body 1 is reset by the spring 2, and the casing 4 is also reset by the resetting of the ring body 1. At this time, the inner diameter of the first engaging portion 43 of the casing 4 presses the beads 36a, 36b, and the beads 36a, 36b Therefore, it is fixedly fixed to the bead holes 321a, 321b and abuts against the ring groove 53 of the handle portion 51, whereby the handle portion 51 is locked to the quick release device A, as shown in the fifth figure, at this time, the handle One end of the portion 51 is protruded from the quick release device A, and is a drive spindle as a component of the circular hole saw 6; in addition, when the drill pipe 5 is to be quickly slid out of the quick release device A, the quick release device A is again The ring body 1 is axially displaced by a finite distance, and the end edge of the first joint portion 43 of the sleeve body 4 is separated from the bead holes 321a, 321b, as shown in the sixth figure, at this time in the bead holes 321a, 321b Since the beads 36a, 36b are in a floatable state without the first joint portion 41 being pressed, the ring groove 53 of the shank portion 51 is no longer locked by the beads 36a, 36b, so the drill rod 5 can slide out of the quick release. Device A 6 out of the hole saws, to release the drill rod 5 until the ring 1 completely out after it is reset.

The advantages of the invention are:

1. The drill pipe 5 is directly assembled to the quick release device A, and the quick release device A is directly assembled to the circular hole saw 6, wherein the handle portion 51 of the drill pipe 5 is the drive spindle of the circular hole saw 6, and After the motor unit is assembled with the shank portion 51, the shank portion 51 is driven to rotate by the motor device, and the relative rotation of the shank portion 51 directly drives the drill bit 52 to rotate, thereby avoiding the offset caused by the vibration at the time of high-speed rotation.

2. The component of the quick release device A of the present invention is extremely simple, and is directly locked to the circular hole saw 6 as an integral component. In other words, the circular hole saw 6 is provided with a quick release device A for the drill pipe 5 The direct sliding into the quick release device A is locked to the circular hole saw 6, so that when the drill pipe 5 is to be detached from the circular hole saw 6, it is only necessary to simply operate the ring 1 to perform axial displacement at a finite distance. Let the drill pipe 5 quickly disengage from the circular hole saw 6.

3. The driving body 3 assembly hole 31 has a hexagonal shape, which fits in the shape of the shank portion 51 of the drill rod 5, wherein the hexagonal portion 34 of the driving body 3 fits over the hexagonal hole shape 11a of the ring body 1, which is provided with a drill. The latching function of the lever 5 to prevent its idling when being driven to rotate; and, another function, the driving body 3 can be axially actuated in the hexagonal hole shape 11a of the ring body 1 without rotating in the radial direction; The ring body 1 is axially displaced by the drive body 3 as a central axis, but is not driven. The body 3 is a central axis and has a problem of radial rotation.

It is specifically noted that the quick release device A of the present invention is an assembly of the circular hole saw 6, which provides the function of quick replacement and locking of the drill pipe 5. And, the assembly of the present invention is suitable for a circular hole saw having a hole shape of 30 mm or less.

In conclusion, it is only a preferred embodiment of the invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the patent application of the present invention are covered by the scope of the invention.

A‧‧‧ quick release device

35‧‧‧Threading Department

5‧‧‧Drill pipe

51‧‧‧ handle

52‧‧‧ drill bit

53‧‧‧ ring groove

6‧‧‧round hole saw

61‧‧‧ screw holes

Claims (5)

A circular hole saw assembly, the assembly comprising: a circular hole saw having an open end, the open end being a circular hole open opening, the opening opening having a diameter of 30 mm or less; and a quick release device for assembling the circle a hole saw; and a drill rod directly slid into the quick release device for combining the quick release device and the circular hole saw; wherein the quick release device comprises: a ring body having a first end opposite thereto a second end, and a set of holes, the first end penetrates into the hollow annular body of the second end, the sleeve hole has a hexagonal hole shape at the second end, and the sleeve hole is outside the first end a surface forming a flange; a set body having an enlarged portion, the enlarged portion extending to form a first joint portion, the sleeve body being provided with a shaft hole extending axially from the enlarged portion to the first joint portion; The body has a second engaging portion, and the second engaging portion extends axially to form a blocking portion, and the blocking portion extends axially to form a hexagonal portion extending axially to form a threaded portion, and the driving body is provided with an assembling hole The assembly hole is hexagonal, and the second joint portion extends axially to the thread portion. The second engaging portion is provided with one or more bead holes, the bead holes are inserted into a bead body, the hexagonal portion is sleeved with a spring, and the second engaging portion is sleeved into the shaft hole of the first engaging portion, the blocking portion is abutted The end of the first joint portion; the sleeve assembly drive body is reinserted into the sleeve hole of the ring body, the enlarged portion abuts against the edge wall of the first end thereof, and the threaded portion protrudes out of the second end of the ring body, The hexagonal portion is sleeved in a hexagonal hole shape of the ring body, and the flange of the ring body covers the outer diameter of the enlarged portion of the sleeve body, thereby achieving that the ring body can be axially displaced at a finite distance outside the outer diameter of the driving body The purpose of the reset. The circular hole saw assembly of claim 1, wherein the circular hole saw is provided with a screw hole for assembly of a threaded portion of the quick release device. The circular hole saw assembly of claim 1, wherein the drill rod has a drill bit and a shank, the shank is a hexagonal cylinder, and the axial direction extends to form a drill bit, and the handle is provided with a ring groove. The bead of the quick release device can be locked in the ring groove. A circular hole saw assembly comprising: a circular hole saw having an open mouth and an end face, the open mouth having a diameter of 30 mm or less; and a screw hole at one end thereof for assembling with the threaded portion of the quick release device; The drill rod has a drill bit and a shank, the shank is a hexagonal cylinder, and the axial direction extends to form a drill bit, and the handle is provided with a ring groove, thereby the bead body of the quick release device is obtained when the drill bit slides into the quick release device Locked in the ring groove; and one end portion thereof protrudes from the quick release device, and is a drive spindle as a circular hole saw assembly; a quick release device includes a ring body, a sleeve body and a driving body, wherein the ring The body is provided with a sleeve hole, a first end and a second end, the sleeve hole is a hollow annular hole body penetrating the ring body, the second end has a hexagonal hole shape, the first end has a flange; the sleeve body has an enlarged a portion extending to form a first joint portion, the sleeve body having a shaft hole extending axially from the enlarged portion to the first joint portion; the drive body having a second joint portion, the second joint portion being axially Extending to form a blocking portion, the blocking portion extending axially to form a hexagonal portion, the hexagonal portion extending axially Forming a threaded portion, the driving body having an assembly hole having a hexagonal shape extending axially from the second joint portion to the threaded portion, the second joint portion being provided with one or more bead holes, the bead hole being placed into the threaded portion a bead, the hexagon is fitted into a spring, and the The second engaging portion is sleeved into the shaft hole of the first joint portion, and the blocking portion is abutted against the end edge of the first joint portion; the sleeve combined driving body is reinserted into the sleeve hole of the ring body, and the enlarged portion is opposite to the first portion a threaded end of the one end of the ring body, the threaded portion protrudes out of the second end of the ring body, the hexagonal portion is sleeved in a hexagonal hole shape of the ring body, and the flange of the ring body covers the outer diameter of the enlarged portion of the sleeve body, The outer diameter of the driving body is axially displaced and reset at a finite distance, thereby being assembled into a quick release device. The circular hole saw assembly of claim 1, wherein the step of locking the drill pipe and the detaching the drill pipe is: first, the ring body of the quick release device can axially displace at a limited distance, thereby The end edge of the first joint portion of the body is separated from the bead hole, and the bead body in the bead hole is in a floating state, so that the handle portion of the drill rod penetrates into the assembly hole of the quick release device, and slides into the threaded portion to pass through to The outer end of the circular hole saw, until the ring groove of the handle is displaced to the position of the bead hole, then the ring body is released, and the ring body is reset by the spring, and the casing is reset by the reset of the ring body. At this time, the inner diameter of the first joint portion of the sleeve presses the bead body, and the bead body is thus fixed to the bead hole and abuts against the ring groove of the handle portion, whereby the handle is locked to the quick release device; and when the drill pipe To quickly slide out of the quick release device, the ring body of the quick release device is axially displaced at a limited distance, and the end edge of the first joint portion of the sleeve body is separated from the bead hole, and the bead in the bead hole is not When the inner diameter of the joint is pressed to be in a floatable state, the ring groove of the shank is no longer locked by the bead, the drill pipe It is possible to slide out of the quick release device and get rid of the circular hole saw until the drill rod is completely detached, and then the ring body can be released to reset.