WO2012097664A1

WO2012097664A1 - Drill bit grinder

Info

Publication number: WO2012097664A1
Application number: PCT/CN2011/084747
Authority: WO
Inventors: 陆红飚
Original assignee: Lu Hongbiao
Priority date: 2011-01-17
Filing date: 2011-12-27
Publication date: 2012-07-26
Also published as: CN202021507U

Abstract

Provided is a drill bit grinder, comprising a grinding wheel, a rotating component and a housing; the grinding wheel and the rotating component are disposed inside the housing; the grinding wheel is connected to the rotating component and rotates with the rotating component; one end of the housing is open and the housing extends from the open end so that the housing is suitable to encase the outer housing of a handheld electric drill chuck; the rotating component is provided with a rotation input part; the rotation input part slidingly fits a rotation output part installed on a handheld electric drill in the axial direction, but cannot rotate relative to the rotation output part of the handheld electric drill.

Description

Grinding drill

Technical field

The invention relates to a grinding drill, in particular to a grinding drill capable of being used with a hand drill.

Background technique

The drill bit can be used to drill through holes or blind holes in solid materials, and also has the function of reaming existing holes. Commonly used drill bits mainly include twist drills, flat drills, center drills, deep hole drills and nest drills. Wait. After the bit has been used for a period of time, the head is easily worn and dull, so it needs to be ground on the grinding wheel.

At present, most of the drill grinding uses an electric grinding drill. Since the electric grinding drill requires parts such as a motor and a power source, the cost is high. In response to this, there has been a grinding rig on the market that does not require components such as motors, such as the patent number. ZL96237595 . 0 The Chinese utility model patent "Twist Drilling Drill" discloses a twist drill grinding machine which is composed of a drill die, a grinding wheel sharpening knife, a spring, a nut, a tool positioning block, a positioning pin, a grinding wheel shaft and a grinding wheel. Pressing piece, screw, grinding wheel, outer casing, grinding wheel bushing, spring, drill sleeve, rotating parts, etc., can be used for blunt grinding edge of twist drill, and can be adapted by using multiple holes in the drill The twist drill of Φ3~Φ12 is inserted and positioned by the tool positioning block, and the grinding wheel is ground. The above patents can work with a hand drill as a power driven drill, thus greatly reducing the manufacturing cost of the drill.

However, since the grinding rig has a drive shaft extending therefrom and connected to the hand drill, this aspect increases the size, weight and difficulty of packaging at the time of production and sales, and on the other hand, in actual use. The user is required to hold the grinding rig and clamp the end of the drive shaft on the chuck of the hand drill, which is obviously not very convenient for the user, thereby reducing work efficiency. In addition, when the drill to be ground is inserted into the drill, the axis of the drill is inclined with respect to the drill, that is, the drill is obliquely inserted into the drill, and when grinding is performed, the user is required to use the finger. It is also very inconvenient for the user to press the obliquely inserted drill bit to press the obliquely inserted drill bit, which not only reduces the efficiency but also affects the grinding effect.

Due to the above drawbacks existing in the prior art, there is still much room for improvement.

Summary of the invention

In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a grinding and drilling device which is more convenient and more efficient to use.

In order to achieve the above object, the present invention provides A grinding drill comprising a grinding wheel, a rotating part and a casing, the grinding wheel and the rotating part are disposed inside the casing, the grinding wheel is connected to the rotating part, and rotates with the rotating part, one end of the casing is open, and the casing is open from the opening thereof One end extends to fit over the outer casing of the flashlight drill portion, and the rotary member is provided with a rotary input portion, and the rotary input portion and the rotary output member mounted on the hand drill are axially slidably engaged, but cannot The rotating output member of the hand drill rotates.

In a preferred embodiment of the invention, the rotational input portion is a first non-circular aperture disposed axially on the rotating member.

In a preferred embodiment of the invention, the housing is further provided with fastening means for securing the drill to the outer casing of the flashlight bit.

In a preferred embodiment of the present invention, the first non-circular hole is a hexagonal hole or a quadrangular hole.

In another preferred embodiment of the present invention, The grinding wheel has an inclined grinding surface such that when the drill bit is ground, the axial direction of the drill bit and the grinding drill are substantially parallel.

In another preferred embodiment of the invention, the housing is transparent.

In another preferred embodiment of the invention, a pad is also provided between the fixture and the hand drill.

In another preferred embodiment of the invention, the liner is a soft rubber sleeve.

In another preferred embodiment of the present invention, The rotating component includes a first rotating member and a second rotating member, the grinding wheel is fixedly coupled to the first rotating member, the first rotating member is slidably sleeved on the second rotating member, and is rotatable with the second rotating member, The first rotating member is provided with a first non-circular hole.

In another preferred embodiment of the present invention, The first rotating member is axially disposed with a second non-circular hole, and the second rotating member is axially disposed with a non-circular column that cooperates with the second non-circular hole, and the first rotating member passes through the second non-circular shape The aperture is slidably sleeved over the non-circular post on the second rotating member.

In another preferred embodiment of the invention, the first rotating member and the second rotating member are in a keyed connection.

In another preferred embodiment of the present invention, Also included is an elastic member that elastically biases the first rotating member in a first direction to be movable in a first direction along the second rotating member; further comprising an adjusting device that passes the thread pair in the second direction Pushing the first rotating member to move in the second direction along the second rotating member, the first direction and the second direction being opposite.

In another preferred embodiment of the invention, the resilient member is a spring and the adjustment device is a knob with a screw or stud.

The invention also provides A method of grinding a drill bit using the above-described grinding rig, mounting a non-circular cylindrical member engageable with a first non-circular hole on a hand drill, and mounting a transmission output member mated with the transmission input portion On the hand drill, the transmission output part is matched with the transmission input part, and the hand electric drill is started to drive the rotating part and the grinding wheel to rotate.

In a further method, the rotational input portion is a first non-circular aperture disposed axially on the rotating member, and the transmission output member is a non-circular cylindrical member that mates with the first non-circular aperture.

Further, the The non-circular hole is a hexagonal hole, and the non-circular part is a hexagonal bit. In use, the head of the hexagonal bit is mounted on the hand drill, the tail is inserted into the non-circular hole, the hand drill is started, and the rotating part and the grinding wheel are rotated. .

Further, the non-circular hole is a four-corner hole, and the non-circular column is a four-corner bit. In use, the head of the four-point drill is fixed on the hand drill, the tail is inserted into the four-corner hole, the hand drill is started, and the rotating part and the grinding wheel are driven. Rotate.

In another method of use, the transmission output member that cooperates with the transmission input portion is mounted on the hand drill, the transmission output member is matched with the transmission input portion, and the grinding drill is fixed to the flashlight drill portion by the fixing device. Above the outer casing, the hand drill is activated to drive the rotating parts and the grinding wheel to rotate.

The grinding drill according to the present invention and the method of using the same make the connection between the drill and the hand drill more convenient and quicker, and the user is more convenient to operate when grinding the drill bit. Comfortable.

The concept, the specific structure and the technical effects of the present invention will be further described in conjunction with the accompanying drawings in order to fully understand the objects, features and effects of the invention.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a grinding machine in accordance with a preferred embodiment of the present invention.

2 is a cross-sectional view of a grinding machine in accordance with a preferred embodiment of the present invention.

Figure 3 is an exploded perspective view of a grinding machine in accordance with a preferred embodiment of the present invention.

4 is a perspective cross-sectional view of a grinding drill of a preferred embodiment of the present invention.

detailed description

Specific embodiments of the present invention are described below in conjunction with the drawings and in accordance with a preferred embodiment of the present invention.

1 is a perspective view of the preferred embodiment showing the outer casing of the drill drill 1, the drill chuck 3, and a plurality of drill jacks 34 into which different types of drill bits can be inserted. A threaded hole 31 is provided at the top of the drill chuck 3, see Fig. 3. The screw of the adjustment knob 32 passes through the threaded hole 31 and extends into the cavity 33 in the drill chuck 3, as shown in Fig. 2.

Figure 2 is a cross-sectional view of the preferred embodiment, and Figure 4 is a grinding wheel for grinding a drill bit. As can be clearly seen in conjunction with Figure 3, the grinding wheel 4 is a centrally-perforated ring member, and the grinding wheel of the prior art. The shaving surface is horizontally different, and the grinding surface 41 of the grinding wheel 4 in this embodiment is disposed to be inclined inward, and the inclined angle is designed such that, as shown in FIG. 4, when the drill bit 9 is inserted from the insertion hole 34, When the grinding surface 41 is bonded and ground, the axial direction of the drill 9 is substantially parallel to the axial direction of the grinding drill. In this way, when the drill is connected to the hand drill, the user can conveniently operate the hand drill with one hand, and press the drill bit while holding the drill while holding the drill.

As shown in Fig. 2, the grinding wheel 4 is carried on a rotating member which transmits the input rotation and torque to the grinding wheel 4 so as to be rotatable together with the rotating member, thereby grinding the drill bit 9. In the present embodiment, the rotating member includes a first rotating member 5 and a second rotating member 7, see Figs. 2 and 3. The pressing plate 6 is pressed against the stepped surface 42 provided on the circumferential side of the hole of the grinding wheel 4, and the pressing plate 6 is screwedly connected with the first rotating member 5, thereby fixing the grinding wheel 4 to the first rotating member 5. It can be understood that the grinding wheel 4 can also be fixedly connected to the first rotating member 5 in other ways in the prior art.

The first rotating member 5 in this embodiment, as shown in FIGS. 2 and 3, includes a base 51, a boss 53 and a column 52, and a hole 531 provided in the boss 53. The grinding wheel 4 is carried on the base 51, and the bolt 523 connecting the pressure plate 6 and the first rotating member 5 passes through the hole 531. The column 52 extends into the cavity 33 of the drill chuck 3, the end of which is provided with a recess 521 in which a resilient spacer 54 is disposed. The screw of the adjustment knob 32 abuts against the upright 52 of the first rotary member 5 via the elastic spacer 54. A second non-circular hole is disposed in the axial direction of the column 52. In the embodiment, the second non-circular hole is a blind hole 522, and the first rotating member 5 is slidably sleeved in the second rotation through the blind hole 522. Above the piece 7, but not relative to the second rotating piece 7. It will be appreciated that for this purpose, the second non-circular aperture may be a non-circular or elliptical aperture of the type such as a hexagonal or quadrangular aperture. Further, the first rotary member 5 can also be slidably coupled to the second rotary member 7 by a common key coupling.

As shown in Figures 2 and 3, correspondingly, the second rotating member 7 has a portion that cooperates with the second non-circular hole of the first rotating member 5. In this embodiment, the portion is a cylinder that matches the blind hole 522. When the cylinder is inserted into the blind hole 522, the two are not relatively rotatable. It will also be understood that when the second non-circular aperture is a non-circular aperture of the type hexagonal or quadrilateral aperture as described above, the cylinder also has a hexagon or quadrilateral that can be matched thereto. Wait for the outer contour.

The first rotating member is further provided with a first non-circular hole in the axial direction. In the embodiment, the first non-circular hole is a hexagonal through hole 71 for transmitting the input torque and movement. The first non-circular aperture may also be other types of non-circular apertures such as a quadrilateral or triangular aperture. The second rotary member 7 is coupled to the housing 1 via a bearing 8, a bearing platen 81 and a shaft retainer 82.

As shown in FIGS. 2 and 3, an elastic member is also disposed outside the second rotating member 7. In the present embodiment, the elastic member is a spring 83. The spring 83 is resiliently biased against the first rotating member 5 such that the upright 52 of the first rotating member 5 always abuts against the adjustment knob 32 on the drill chuck 3.

In addition, in order to realize the axial positioning of the drill bit 9 inserted into the drill chuck 3, the housing 1 is further provided with a positioning ring 2, as shown in Figs. 2 and 3, the positioning ring 2 includes a journal 21 and is connected to the shaft. The limiting surface 22 of the bottom of the neck 21 is fixedly inserted into the cavity 33 of the drill chuck 3, the limiting surface 22 has a truncated cone shape and the outer diameter is smaller than the inner diameter of the grinding wheel 4, the limiting surface 22 and the grinding wheel 4 An annular groove having a V-shaped cross section is formed between the grinding faces 41. The annular groove is located just below the insertion hole 34, and the positioning ring 2 is further provided with a through hole 23 penetrating in the axial direction, the first rotating member 5 After the column 52 passes through the through hole 23, it is accommodated in the cavity 33 of the drill chuck 3.

Thus, when the rotation and the torque are input through the first non-circular hole of the second rotating member 7, the second rotating member 7 starts to rotate, and the first rotating member 5 is rotated by the second non-circular hole, and the grinding wheel 4 follows the first The rotary members 5 rotate together. At this time, the drill bit 9 is inserted through the insertion hole 34 provided on the drill chuck 3 corresponding to its model, and grinding can be performed on the grinding surface 41 of the rotating grinding wheel 4. According to the grinding condition of the drill bit, the distance of the grinding wheel 4 relative to the drill bit 9 can be adjusted by the adjusting knob 32 at the top of the drill chuck 3. When the adjusting knob 32 is tightened, the first rotating member 5 is subjected to a downward external force. Movement, at this time, the grinding wheel 4 also moves downward, so that the grinding surface 41 of the grinding wheel 4 is away from the drill bit 9: when the adjusting knob 32 is loosened, the first rotating member 5 bounces upward under the elastic force of the spring 83. The grinding wheel 4 is moved upwards so that the grinding surface 41 of the grinding wheel 4 is close to the drill bit 9. In actual use, for example, a twist drill has two working faces, and after one side is ground, it can be inserted into the insertion hole 34 of the drill chuck 3 by rotating 180 degrees, and the other working surface of the drill bit can be ground.

Figure 4 shows an operational state of this embodiment. The power is derived from a hand drill inserted from the open end of the housing 1. As shown in the figure, a is the transmission output shaft of the hand drill, the outer casing is connected with the torque plate b, the transmission output shaft a is connected with the connecting chuck c, and the connecting chuck c is clamped with the first non-circular hole Cooperating with the rotating output member d. At the time of installation, the rotational output member d is first placed on the coupling collet c, and then the torque disc b is tightened so that the rotational output member d is clamped on the coupling collet c. Unlike the prior art, the process of mounting the rotary output member d to the hand drill is independent of the drill, and is therefore more convenient, and if necessary, the torque plate b can be tightened by means of a tool. In use, the rotary output member d that has been mounted on the hand drill is directly inserted into the hole 71 of the grinding drill that cooperates with the rotary output member to start the hand drill, and preferably the hand drill is rotated clockwise, the hand The torque and rotation of the drill output can be transmitted to the drill through the rotary output. In the figure, the rotating output part d is a reverse-mounted hex head, and since the hex head is a commonly used tool for a hand drill, it can be easily obtained, so the head of the hex head is turned inward and the tail is facing outward. It can be installed directly on the hand drill and can be used directly as the rotating output part d without special processing. At this time, the first non-circular hole 71 of the grinding rig should also be correspondingly provided as a hexagonal hole that can cooperate with the hex head. Similarly, in another embodiment, the rotating output member may also be a reverse-mounted quadrangular drill bit, and at this time, the first non-circular hole 71 of the grinding drill should also be correspondingly disposed with the quadrangular head. A hexagonal hole with a drill bit.

It can be understood that the first non-circular hole in the embodiment is actually an example of a rotation input portion provided on the rotating member, and the function thereof is to rotate the output member from the hand drill (ie, the above-mentioned rotation output member, The rotation and torque of the reversed hex head or the reversed four-corner bit are transmitted to the rotating parts of the grinding machine to drive the grinding wheel to rotate. In other embodiments, the rotation input portion may be in other forms, such as a groove disposed on the rotating member, and the rotating output member of the hand drill is correspondingly provided with a boss corresponding to the groove; Or conversely, a non-circular columnar body or boss is provided on the rotating part of the grinding drill, and correspondingly a non-circular hole or groove is provided on the rotating output part of the hand drill. In these embodiments, the rotary input portion of the drill and the rotary output member of the hand drill are axially simple sliding fits, but are not rotatable relative thereto, thereby transmitting rotation and torque from the hand drill to the drill drill. The prior art process of clamping the drive shaft of the drill with the drive shaft to the hand drill is difficult, so that the use of the drill is more convenient, quick and comfortable.

As shown in Figures 1 and 4, the housing 1 extends from one end of the opening and is adapted to fit over the outer casing of the flashlight drill bit. The housing 1 is also provided with fixing means for fixing it to the hand drill. An example of the fixing device is shown, which comprises a transversely extending shaft hole 11 , the middle of the shaft hole 11 is provided with a slit 13 which is opened in the cross section, and the screw hole 12 is bored in the shaft hole 11 The large end end is located at one end of the shaft hole 11, and the threaded end of the screw 12 is connected with a wing nut 14. Tighten the wing nut 14 on the outside of the housing 1 to tighten the bottom opening of the housing 1 to securely connect the hand drill to the drill. In order to prevent pinching the hand drill, the corresponding part of the casing 1 of the grinding drill can also be provided with a pad made of a soft material such as soft rubber or sponge to protect the hand drill on the one hand and the hand on the other hand. The friction between the electric drill and the drill casing 1 is as shown in the drawing. In this embodiment, the gasket is a soft rubber sleeve 15.

In addition, the housing 1 can also be configured to be transparent to observe the state of the connection between the hand drill and the drill rig and whether the motor rotates normally when the drill bit is ground. Therefore, the occurrence of the rotation of the hand drill motor due to the installation problem is prevented.

The above has described in detail the preferred embodiments of the invention. It should be understood that many modifications and variations can be made in the present invention without departing from the scope of the invention. Therefore, any technical solution that can be obtained by a person skilled in the art based on the prior art based on the prior art by logic analysis, reasoning or limited experimentation should be within the scope of protection determined by the claims.

Claims

A grinding drill comprising a grinding wheel, a rotating member and a housing, the grinding wheel and the rotating member being disposed within the housing, the grinding wheel being coupled to the rotating member and rotating with the rotating member The one end of the housing is open, and the housing extends from one end of the opening to fit over the outer casing of the flashlight drill portion, and the rotating component is provided with a rotary input portion. The rotation input portion is slidably engaged with the rotation output member mounted on the hand drill in the axial direction, but is not rotatable relative to the rotation output member of the hand drill.
A grinding rig according to claim 1, wherein said rotation input portion is a first non-circular hole provided in the axial direction on said rotating member.
A grinding rig according to claim 1, wherein said housing is further provided with fixing means for fixing said grinding rig on said outer casing of said flashlight drill portion.
The grinding rig according to claim 2, wherein the first non-circular hole is a hexagonal hole or a quadrangular hole.
A grinding rig according to claim 1 or 2 or 3, wherein the grinding wheel has an inclined grinding surface such that when the drill bit is ground, the axial direction of the drill bit and the grinding rig is Roughly parallel.
A grinding aid according to claim 1 or 2 or 3, wherein the housing is transparent.
A grinding rig according to claim 3, wherein a spacer is disposed between said fixing means and said hand drill.
A grinding aid according to claim 7 wherein said liner is a soft rubber sleeve.
A grinding rig according to claim 1 or 2 or 3, wherein said rotating member comprises a first rotating member and a second rotating member, said grinding wheel being fixedly coupled to said first rotating member, said A rotating member is slidably sleeved on the second rotating member, and is rotatable with the second rotating member, and the first non-circular hole is disposed on the second rotating member.
The grinding boring device according to claim 9, wherein the first rotating member is axially disposed with a second non-circular hole, and the second rotating member is axially disposed with the second non-zero a circular hole mating non-circular post, the first rotating member being slidably sleeved on the non-circular post on the second rotating member through the second non-circular hole.
A grinding aid according to claim 9, wherein a coupling between said first rotating member and said second rotating member is achieved.
A grinding aid according to claim 9, further comprising an elastic member elastically biasing the first rotating member in the first direction so as to be oriented along the second rotating member The first direction of motion; further comprising an adjustment device that pushes the first rotating member in a second direction by a thread pair, and is movable along the second rotating member in the second direction, The first direction is opposite to the second direction.
A grinding rig according to claim 12, wherein said elastic member is a spring, and said adjusting means is a knob with a screw or a stud.
A method of using the drill according to claim 1 wherein said transmission output member mated with said transmission input is mounted on a hand drill such that said transmission output member and said transmission The input portion cooperates to activate the hand drill to drive the rotating member and the grinding wheel to rotate.
The method according to claim 14, wherein said rotation input portion is a first non-circular hole axially disposed on said rotating member, said transmission output member being said first non-circular A non-circular cylindrical member with a matching hole.
The method according to claim 15, wherein said non-circular hole is a hexagonal hole, said non-circular column member is a hexagonal bit, and said head of said hexagonal bit is fixed in use. On the hand drill, a tail is inserted into the hexagonal hole, and the hand drill is activated to drive the rotating component and the grinding wheel to rotate.
Claim 15 The method is characterized in that the non-circular hole is a four-corner hole, and the non-circular column member is a four-corner bit, and the head of the four-corner bit is fixed on the hand drill in use. The tail is inserted into the four-corner hole, and the hand drill is activated to drive the rotating component and the grinding wheel to rotate.
A method of using the drill according to claim 3, wherein said transmission output member mated with said transmission input is mounted on a hand drill such that said transmission output member and said transmission The input portion cooperates, and the grinding device is fixed on the outer casing of the flashlight drill portion by the fixing device, and the hand drill is activated to drive the rotating member and the grinding wheel to rotate.