CN210188599U - Alloy step drill bit convenient to installation - Google Patents

Abstract

The utility model discloses an alloy step drill bit convenient to install, which comprises a drill bit, wherein one side of the drill bit is a drill handle, a cutting sleeve is arranged on the drill handle, the cutting sleeve is in a square box cover shape, a clamping hole is arranged in the middle of the cutting sleeve, and the drill handle penetrates through the clamping hole in the middle of the cutting sleeve; the utility model has the advantages of reasonable design, it has the cutting ferrule to locate the block at whole alloy step drill bit, be provided with two limiting plates on the cutting ferrule, the diameter of whole alloy step drill bit can be enlarged to the limiting plate, in the face of the drilling of the great drilling machine of some volumes, the drilling machine can firmly fix this alloy step drill bit, fixed not hard up problem can not appear, the limiting plate surface is covered with anti-skidding line simultaneously, anti-skidding line improves the frictional force of limiting plate surface and drilling machine folder, the problem of skidding appears when avoiding the drill bit to fix, improve the fastness of drill bit, fastening screw is the hand screw, the hand screw is twisted the operation and is designed for making things convenient for the hand specially, the hand screw need not extra instrument and can be screwed up it.

Description

Alloy step drill bit convenient to installation

Technical Field

The utility model relates to the technical field of mechanical device, specifically be an alloy step drill bit convenient to installation.

Background

Step drills are the most widely used hole machining tools. The diameter is usually in the range of 0.25 to 80 mm. It is mainly composed of a working part and a handle part. The working part is provided with two spiral grooves which are shaped like twist, thereby obtaining the name. In order to reduce the friction between the guide part and the hole wall during drilling, the diameter of the stepped drill bit is gradually reduced from the drill tip to the handle to form an inverted cone. The helix angle of the step drill mainly influences the size of a rake angle on a cutting edge, the strength of a cutting edge lobe and the chip removal performance; hole machining tools can generally be divided into two main categories: one is a tool for processing holes from solid materials, and the common tools include twist drills, center drills, deep hole drills and the like; the other type is a tool for reprocessing the existing hole on the workpiece, commonly used are a reamer, a boring cutter and the like, and the twist drill is a hole machining tool with a complex shape and is widely applied. Are often used to drill holes with less precision and rougher surfaces. The hole precision processed by the high-speed steel drill bit can reach IT 11-IT 13, and the surface roughness can reach 6.3-25; when the hard alloy drill bit is used for processing, the hardness can reach IT 10-IT 11 and 3.2-12.5 respectively.

The existing step drill bits are all fixed on a drilling machine, the handle parts of the step drill bits are inserted into holes of the drilling machine, and the step drill bits are clamped and fixed through screws, but the existing part of the step drill bits are short in diameter and thin in whole, some drilling machines cannot firmly fix the step drill bits, and the drill bits are easy to loosen.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an alloy step drill bit convenient to installation has advantages such as convenient to use, the installation of being convenient for, has solved the lower scheduling problem of the fixed firmness of current drill bit.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an alloy step drill bit convenient to installation, includes the drill bit, drill bit one side is the drillstock, be provided with the cutting ferrule on the drillstock, be provided with the card hole in the middle of the cutting ferrule, the drillstock from passing the card hole in the middle of the cutting ferrule to with card hole block, the cutting ferrule both ends all are fixed with nut, two nut internal thread is connected with a fastening screw, fastening screw one end is provided with the limiting plate, be fixed with a bearing on the limiting plate.

In a further improvement, one end of the fastening screw is clamped with the bearing inner ring.

In a further improvement, the two limiting plates are arc-shaped.

In a further improvement, the surface of the limiting plate is fully distributed with anti-skid grains.

In a further improvement, the cutting sleeve is in a square box cover shape.

In a further improvement, the fastening screw is a hand screw.

(III) advantageous effects

Compared with the prior art, the utility model provides an alloy step drill bit convenient to installation possesses following beneficial effect:

1. this kind of alloy step drill bit convenient to installation, structural design is reasonable, and convenient to use has the cutting ferrule at whole alloy step drill bit drillstock department block, is provided with two limiting plates on the cutting ferrule, and the diameter of whole alloy step drill bit can be enlarged to the limiting plate, and in the face of the drilling of the great drilling machine of some volumes, the drilling machine can be firmly fixed with this alloy step drill bit, the fixed not hard up problem can not appear.

2. This kind of alloy step drill bit convenient to installation, limiting plate surface are covered with anti-skidding line, and anti-skidding line improves the frictional force of limiting plate surface and drilling machine folder, and the problem that appears skidding when avoiding the drill bit to fix improves the fastness of drill bit, and fastening screw is the hand screw, and the hand screw is special to be twisted the operation and design for making things convenient for the hand, and the hand screw need not extra instrument and can be twisted it tightly.

3. According to the alloy step drill bit convenient to install, the clamping sleeve is in a square box cover shape, when the drill bit is placed on a plane, the clamping sleeve can play a role in preventing rolling, and the drill bit is prevented from rolling on the plane at will.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the tool bit of the present invention;

fig. 3 is the schematic diagram of the card sleeve structure of the present invention.

In the figure: 1. a drill shank; 2. a drill bit; 3. a card sleeve; 4. fastening screws; 5. a limiting plate; 6. a clamping hole; 7. a bearing; 8. and a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an alloy step drill bit convenient to installation, includes drill bit 2, 2 one sides of drill bit are drillstock 1, be provided with cutting ferrule 3 on the drillstock 1, be provided with card hole 6 in the middle of the cutting ferrule 3, drillstock 1 is from passing card hole 6 in the middle of the cutting ferrule 3 to with the 6 blocks in card hole, 3 both ends of cutting ferrule all are fixed with nut 8, two 8 female connection of nut has a fastening screw 4, 4 one end of fastening screw is provided with limiting plate 5, be fixed with a bearing 7 on the limiting plate 5.

As shown in fig. 2, 4 one ends of fastening screw and the block of bearing 7 inner circle, when fastening screw 4 rotates, can rotate at the inner circle of bearing 7, two limiting plate 5 is circular-arcly, and when the folder of drilling machine pressed from both sides the drill bit tightly, limiting plate 5 can closely laminate with the circular folder of drilling machine, increased area of contact, cutting ferrule 3 is the square box lid form, and when drill bit 2 was put on the plane, cutting ferrule 3 can play the effect of anti-roll, avoids drill bit 2 to roll on the plane at will.

As shown in figure 1, the limiting plate 5 surface is covered with anti-skidding line, and the anti-skidding line improves the frictional force of 5 surfaces of limiting plate and drilling machine folder, avoids the problem that the drill bit 2 appears skidding when fixed, improves the fastness of drill bit 2.

The fastening screw 4 is a hand screw which is specially designed for facilitating hand-screwing operation and can be screwed down without an additional tool.

The working principle is as follows: when using, can unscrew two fastening screws 4, fastening screw 4 and 8 threaded connection of nut, fastening screw 4 outwards removes, drive limiting plate 5 outwards removal through fastening screw 4, the expansion of limiting plate 5 makes the diameter of whole drill bit 2 obtain increasing, insert the drillstock 1 of this alloy step drill bit 2 in the drilling machine afterwards, the folder through in the drilling machine presss from both sides tightly drill bit 2, because limiting plate 5 surface is covered with anti-skidding line, limiting plate 5 can play skid-proof effect, let the folder of drilling machine can press from both sides it tightly, avoid appearing the problem of skidding. After the diameter of the whole drill bit 2 is increased, the drill bit can be fixed facing drilling machines with different sizes.

To sum up, the utility model has reasonable structural design, the cutting sleeve 3 is clamped at the drill handle 1 of the whole alloy step drill bit 2, the cutting sleeve 3 is provided with two limiting plates 5, the limiting plates 5 can enlarge the diameter of the whole alloy step drill bit 2, and when the drilling machine faces to the drilling of a drilling machine with larger volume, the drilling machine can firmly fix the alloy step drill bit 2, so that the problem of loose fixation can not occur; the anti-slip threads are distributed on the surface of the limiting plate 5, the anti-slip threads improve the friction force between the surface of the limiting plate 5 and a clamping piece of a drilling machine, the problem of slipping when the drill bit 2 is fixed is solved, the firmness of the drill bit 2 is improved, the fastening screw 4 is a hand-screwed screw which is specially designed for facilitating hand-screwed operation, and the hand-screwed screw can be screwed without an additional tool; the cutting ferrule 3 is square box cover shape, when the drill bit 2 is placed on the plane, the cutting ferrule 3 can play the role of anti-rolling, and the drill bit 2 is prevented from rolling on the plane at will.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An alloy step drill convenient to installation, includes drill bit (2), its characterized in that: drill bit (2) one side is drill stem (1), be provided with cutting ferrule (3) on drill stem (1), be provided with card hole (6) in the middle of cutting ferrule (3), drill stem (1) is from passing card hole (6) in the middle of cutting ferrule (3) to with card hole (6) block, cutting ferrule (3) both ends all are fixed with nut (8), two nut (8) female connection has one fastening screw (4), fastening screw (4) one end is provided with limiting plate (5), be fixed with one bearing (7) on limiting plate (5).

2. An alloy step drill for ease of installation according to claim 1, wherein: one end of the fastening screw (4) is clamped with the inner ring of the bearing (7).

3. An alloy step drill for ease of installation according to claim 1, wherein: the two limiting plates (5) are arc-shaped.

4. An alloy step drill for ease of installation according to claim 1, wherein: the surface of the limiting plate (5) is full of anti-skid lines.

5. An alloy step drill for ease of installation according to claim 1, wherein: the cutting sleeve (3) is in a square box cover shape.

6. An alloy step drill for ease of installation according to claim 1, wherein: the fastening screw (4) is a hand-screwed screw.

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