CN215749005U

CN215749005U - Coupling head structure of electric drill

Info

Publication number: CN215749005U
Application number: CN202122255374.6U
Authority: CN
Inventors: 金超群; 高恩生; 罗辉
Original assignee: Zhejiang Deshuo Technology Co ltd
Current assignee: Zhejiang Deshuo Technology Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-02-08
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a coupling head structure of an electric drill, which belongs to the field of electric tools and comprises a coupling head main body, wherein the outer diameter of the coupling head main body is reduced from back to front, the coupling head main body is divided into at least two sections of cylinders with different diameters, one end of the coupling head main body is provided with a connecting part used for being clamped and connected with a chuck of the electric drill, the connecting part is arranged on the cylinder with the largest diameter at the tail end of the coupling head main body, and functional heads with different inner hole diameters are sleeved on the matched cylinders in a replaceable mode and connected with the coupling head main body. The utility model can be used for installing the functional heads with different inner hole diameters, so that the functional heads are connected to an electric drill for use, and the adaptability is stronger.

Description

Coupling head structure of electric drill

Technical Field

The utility model relates to the field of electric tools, in particular to a coupling head structure of an electric drill.

Background

The electric drill is a drilling machine using electricity as power, is a conventional product in electric tools, has the main specifications of 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm and the like, and has the tensile strength of 390N/mm²Of the drill bitDiameter. The maximum drilling diameter of the material such as nonferrous metal, plastic and the like can be 30-50% larger than the original specification. Electric drills can be divided into three categories: the electric hand drill is a portable small-sized drilling tool and consists of a small motor, a control switch, a drill chuck and a drill bit, and generally, the electric hand drill uses the chuck to clamp a cutter, a screwdriver bit or other functional heads which can be arranged in the chuck and are used on the electric drill to work.

For example, a simple and easy hand-held type mortar agitating unit that bulletin number is CN206230676U, including casing, motor, drive mechanism, power connecting wire and puddler, the front end of casing is equipped with the chuck, and its rear end is equipped with the handle, and this casing top is equipped with the button, the motor sets up in the casing, the rear end of handle is equipped with carries the pull handle, and its lower extreme is equipped with the power connecting wire, puddler one end as its with the connector that the chuck is connected, its other end are equipped with the stirring head, the connector matches the suit in the chuck, and the motor passes through the drive mechanism drive and connects the puddler.

For example, a multifunctional electric tool with publication number CN110116438A includes an electric drill body, an arc-shaped grip is arranged at one end of the electric drill body, a forward and reverse rotation switch and an electronic stepless speed regulation switch are arranged at one side of the arc-shaped grip, a locking button is arranged on the arc-shaped grip, a rotating shaft is mounted in the electric drill body, a metal rotating stud and a metal chuck are mounted on the rotating shaft, and a fastening piece for fastening is arranged in the metal chuck; and a grinding wheel assembly is arranged on the metal rotating stud through a flat key, and a double-drill-bit assembly, a grinding wheel assembly, a detachable drill-bit assembly and a universal flexible shaft are arranged in the metal chuck in a replaceable manner.

However, some electric drill chucks with functional heads on the market cannot be used for clamping, such as a ground drill, a partial ice drill or a partial stirrer, an interface for connecting the ground drill is an inner hole with the diameter of 20mm, an interface for connecting the partial ice drill is an inner hole with the diameter of 18mm, and an interface for connecting the partial stirrer is an external thread of M14, so that the electric drill chucks cannot be used for clamping the common electric drill chucks, and therefore the electric drill chucks can be used only through corresponding couplers, and one coupler is replaced by one functional head, so that the replacement is complicated.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a coupling head structure of an electric drill, which can be adapted to functional heads with different inner hole diameters.

The technical scheme of the utility model is as follows: the connecting head structure of the electric drill is characterized by comprising a connecting head main body, wherein the outer diameter of the connecting head main body is reduced from back to front, the connecting head main body is divided into at least two sections of cylinders with different diameters, one end of the connecting head main body is provided with a connecting part used for being clamped and connected with a chuck of the electric drill, the connecting part is arranged on the cylinder with the largest diameter at the tail end of the connecting head main body, and functional heads with different inner hole diameters are sleeved on the matched cylinders in a replaceable mode and connected with the connecting head main body.

The further optimization scheme of the utility model is as follows: the other end of the coupling head main body is provided with an internal thread hole for connecting a functional head, and the internal thread hole is arranged on a cylinder with the minimum diameter at the front end of the coupling head main body.

The further optimization scheme of the utility model is as follows: the number of the cylinders of the coupling head main body is two, the coupling head main body comprises a first cylinder and a second cylinder, and the outer diameter of the first cylinder is larger than that of the second cylinder.

The further optimization scheme of the utility model is as follows: the side wall of the cylinder is provided with a through pin hole, and the functional head is sleeved on the cylinder and connected with the cylinder through a pin.

The further optimization scheme of the utility model is as follows: the coupling is a hexagonal link.

The further optimization scheme of the utility model is as follows: the connecting part is a three-way link rod.

The further optimization scheme of the utility model is as follows: the coupling portion is integral with the coupling head body.

The further optimization scheme of the utility model is as follows: and all the cylinders of the coupling head main body are integrally formed.

The further optimization scheme of the utility model is as follows: the cross section size of the connecting part is smaller than the outer diameter of a cylinder with the largest diameter at the tail end of the connecting head main body, and a step is arranged between the cylinder and the connecting part.

The further optimization scheme of the utility model is as follows: and a circle of contact plane is arranged at the edge of the orifice of the internal thread hole.

Compared with the prior art, the electric drill chuck has the advantages that the coupling head main body is clamped and fixed in the electric drill chuck through the coupling part, and the functional heads with different inner hole diameters are sleeved on the column body of the matched coupling head main body in a replaceable mode and connected with the coupling head main body, so that different types of functional heads can be installed on the electric drill for use.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the background art and explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a connection diagram of the present invention.

FIG. 2 is a block diagram of the present invention.

FIG. 3 is a block diagram of the present invention.

FIG. 4 is a block diagram of the present invention.

Fig. 5 is a schematic structural diagram of the earth auger.

FIG. 6 is a sectional view of the ground auger in connection with the coupling head body.

Fig. 7 is a schematic structural diagram of the ice drill.

FIG. 8 is a sectional view of the ice bur in connection with the coupling head body.

Fig. 9 is a schematic view of the structure of the stirrer.

FIG. 10 is a sectional view of the connection of the agitator to the coupling head body.

In the figure: 1. an electric drill; 2. a chuck; 3. a coupling head body; 4. a stirrer; 5. ice drilling; 6. drilling the ground; 7. a coupling portion; 8. a first column; 9. a second cylinder; 10. a first pin hole; 11. an internally threaded bore; 12. a second step; 13. a first step; 14. a pin shaft; 15. a second pin hole; 16. an inner bore; 17. contacting the plane.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the utility model.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element which is referred to must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 10, the coupling head structure of the electric drill includes a coupling head main body 3, an outer diameter of the coupling head main body 3 is reduced from back to front, the coupling head main body 3 is divided into at least two sections of cylinders with different diameters, a first step 13 is provided between adjacent cylinders with different diameters, and preferably, each cylinder of the coupling head main body 3 is integrally formed.

As shown in fig. 2-4, one end of the coupling head body 3 is provided with a coupling part 7 for clamping and connecting with the chuck 2 of the electric drill 1, the coupling part 7 is a hexagonal link or a three-way link, preferably, the coupling part 7 is a hexagonal link, the coupling part 7 is arranged on a column with the largest diameter at the tail end of the coupling head body 3, and the coupling part 7 is integrated with the coupling head body 3. The coupling 7 and the chuck 2 of the drill 1 are connected in the same manner as the drill bit of the drill 1 is mounted in the chuck 2 as is conventional for drill 1. The coupling 7 is a hexagonal link or a three-part link to make the connection of the coupling head body 3 to the drill 1 more stable.

Preferably, the cylinder quantity of coupling head main part 3 is two sections, including first cylinder 8 and second cylinder 9, second cylinder 9 an organic whole is connected at the front end of first cylinder 8, and the external diameter of first cylinder 8 is greater than the external diameter of second cylinder 9, coupling portion 7 establishes the tail end at first cylinder 8.

The cross-sectional dimension of the connecting part 7 is smaller than the outer diameter of a cylinder with the largest diameter at the tail end of the connecting head body 3, namely the cross-sectional dimension of the connecting part 7 is smaller than the outer diameter of the first cylinder 8, a second step 12 is arranged between the first cylinder 8 and the connecting part 7, and when the connecting head body 3 is connected with the chuck 2 of the electric drill 1 through the connecting part 7, the second step 12 is in contact with the chuck 2, so that the rotation stability of the connecting head body 3 is improved.

The removable cover of functional head with different hole 16 diameters is connected, preferably with coupling head main part 3 on the assorted cylinder, all be equipped with the first pinhole 10 that runs through on the lateral wall of cylinder, first pinhole 10 radially runs through the cylinder along the cylinder, and the functional head that has hole 16 is equipped with along the radial second pinhole 15 that runs through of functional head, hole 16 is passed through to second pinhole 15, the hole 16 cover that the functional head passes through one end is on the cylinder of assorted coupling head main part 3, makes the butt joint of first pinhole 10 hole sites on second pinhole 15 and the size assorted cylinder, passes first pinhole 10 and second pinhole 15 through round pin axle 14 and links together fixed with coupling head main part 3 pin junction. The pin connection mode is a conventional connection mode in the market.

For example, two kinds of functional heads with different inner holes 16, one is an earth auger 6, the inner hole 16 of the interface of the earth auger 6 is 20mm in diameter, the other is an ice auger 5, the inner hole 16 of the interface of the ice auger 5 is 18mm in diameter, the outer diameter of the first cylinder 8 is 20mm matched with the earth auger 6, the outer diameter of the second cylinder 9 is 18mm matched with the ice auger 5, as shown in fig. 5 and 6, when the earth auger 6 needs to be installed for use, the interface of the earth auger 6 is sleeved in from the front end of the coupling head main body 3, the interface of the earth auger 6 is sleeved outside the first cylinder 8, a second pin hole 15 on the interface of the earth auger 6 is butted with a first pin hole 10 on the first cylinder 8, and finally a pin shaft 14 is inserted to lock the earth auger 6 and the first cylinder 8 together, as shown in fig. 7 and 8, when the earth auger 5 needs to be installed for use, the interface of the ice auger 5 is sleeved in from the front end of the coupling head main body 3, the interface of the ice drill 5 is sleeved to the outer side of the second column body 9, so that a second pin hole 15 on the interface of the ice drill 5 is in butt joint with a first pin hole 10 on the second column body 9, and finally a pin shaft 14 is inserted to lock the ice drill 5 and the second column body 9 together. The coupling head main body 3 can be matched with functional heads with different inner hole 16 diameters for installation and use, and the coupling head main body 3 does not need to be replaced when different functional heads are installed.

Further, the other end of the coupling head body 3 is provided with an internal thread hole 11 for connecting a functional head, the internal thread hole 11 is provided on the cylinder having the smallest diameter at the front end of the coupling head body 3, and the internal thread hole 11 is provided on the front end of the second cylinder 9, and the functional head having the external screw rod can be connected to the coupling head body 3 by screwing the functional head in the internal thread hole 11.

For example, as shown in fig. 9 and 10, the connector is an M14 male screw stirrer 4, the female screw hole 11 is an M14 female screw hole 11 matching the connector of the male screw of the stirrer 4, when the stirrer 4 needs to be connected to the coupling head body 3, the connector is screwed into the female screw hole 11 to connect the stirrer 4 and the coupling head body 3, so that the coupling head body 3 can be connected with both a functional head having an inner hole 16 and a functional head having a screw interface, and the adaptability is better.

The drill way border of internal thread hole 11 is equipped with round contact plane 17, and when function head threaded connection was in internal thread hole 11, contact plane 17 and the overhead plane of function offset, the drive function head that makes coupling head main part 3 ability more stable rotates.

The coupling head structure of the electric drill provided by the utility model is described in detail, the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the examples is only used for helping to understand the utility model and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The connecting head structure of the electric drill is characterized by comprising a connecting head main body, wherein the outer diameter of the connecting head main body is reduced from back to front, the connecting head main body is divided into at least two sections of cylinders with different diameters, one end of the connecting head main body is provided with a connecting part used for being clamped and connected with a chuck of the electric drill, the connecting part is arranged on the cylinder with the largest diameter at the tail end of the connecting head main body, and functional heads with different inner hole diameters are sleeved on the matched cylinders in a replaceable mode and connected with the connecting head main body.

2. The structure of the coupling head for electric drills according to claim 1, wherein the other end of the coupling head body is provided with an internally threaded hole for connecting the function head, the internally threaded hole being provided in a cylinder having a smallest diameter at the front end of the coupling head body.

3. The coupling head structure of the electric drill according to claim 1 or 2, wherein the number of the columns of the coupling head body is two, and the coupling head body comprises a first column and a second column, and the outer diameter of the first column is larger than that of the second column.

4. The electric drill coupling head structure as claimed in claim 1, wherein the side wall of the cylinder is provided with a through pin hole, and the functional head is sleeved on the cylinder and connected with the cylinder pin.

5. The power drill coupling head structure of claim 1 wherein the coupling portion is a hexagonal link.

6. The electric drill coupling head structure of claim 1 wherein the coupling portion is a three-way link.

7. The power drill coupling head structure of claim 1 wherein the coupling portion is integral with the coupling head body.

8. The power drill coupling head configuration of claim 1 wherein each of the shank portions of the coupling head body is integrally formed.

9. The structure of the coupling head of the electric drill according to claim 1 or 7, wherein the coupling portion has a cross-sectional dimension smaller than an outer diameter of a cylinder having a largest diameter at a rear end of the body of the coupling head, the cylinder having a step with the coupling portion.

10. The power drill coupling head configuration of claim 2 wherein the orifice edge of the internally threaded bore is provided with a land.