CN220161777U - Drilling fixture - Google Patents

Abstract

The utility model relates to the technical field of clamps, in particular to a drilling clamp, which comprises a straight column and a pipe body, wherein a circle of straight grooves which are distributed circumferentially are formed in the straight column along the outer peripheral surface of the straight column, end blocks are respectively arranged on the left side groove walls of the straight grooves, screw rods are arranged on the side surfaces of the end blocks, nut pairs are connected to the screw rods in a threaded manner, the right end of each screw rod is in transmission connection with a mounting ring arranged on the right side inside the straight column, a planetary gear structure which is in rotation with each screw rod is arranged inside the mounting ring, connecting rods are respectively and rotatably arranged on the end blocks and the nut pairs in the same straight groove, movable ends of the two connecting rods are respectively and rotatably arranged on the same pressing plate, the clamp is inserted into a pipe from a port by means of hollow inside of the pipe, and is outwards extended from the inner wall of the pipe by utilizing a plurality of pressing blocks, so that the inner wall of the pipe is clamped and locked from inside to outside, the position of the pipe is ensured, drilling is convenient, and deformation of the pipe can be avoided.

Description

Drilling fixture

Technical Field

The utility model relates to the technical field of clamps, in particular to a drilling clamp.

Background

Drilling machine is generally used for drilling pipe fittings, and in the drilling process, the pipe fittings are required to be locked by using a clamp in order to ensure the position fixing of the pipe fittings. The conventional clamps are used for clamping the outer wall of the pipe, such as a three-jaw chuck, and the structure can maintain the fixing of the pipe, but the pipe is deformed due to the fact that the inside of the pipe is hollow and the clamping force is excessive, so that in order to prevent the deformation of the outer wall of the pipe, a tool for clamping and fixing the inner wall of the pipe from the inside of the pipe is required to be provided.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a drilling clamp.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a boring grab, includes straight post and body, the straight post is offered the straight slot that circumference distributes along its outer peripheral face round, the left side slot wall in straight slot is provided with the end block respectively, and the end block side is provided with the lead screw, equal threaded connection has the nut pair on the lead screw, the right-hand member of each lead screw all with the installation ring transmission that the inside right side of straight post set up is connected, the inside of installation ring is provided with the planetary gear structure that keeps the shaft coupling rotatory with each lead screw, rotates respectively on end block and the nut pair in the same straight slot and installs the connecting rod to the loose end of two connecting rods is all rotated and is installed on same clamp plate, the straight post is inwards inserted from the port of body, and the clamp plate presses the inner wall surface of body.

In a preferred technical scheme, the planetary gear structure comprises a driving gear arranged in the middle and a plurality of driven gears arranged on the outer sides of the driving gears.

In a preferred technical scheme, the outer end of a transmission shaft arranged at the center of the driving gear is provided with a rotating handle.

In a preferred technical scheme, the driven gears are circumferentially distributed on the outer sides of the driving gears, and the rotary shafts arranged at the centers of the driven gears and the screw rods arranged in the straight grooves keep coaxial rotation.

In a preferred technical scheme, the outer surface of the pressing plate is provided with an anti-slip pad.

In a preferred embodiment, the pressure plate extends radially outward of the straight column.

The beneficial effects of the utility model are as follows:

1. when the distance between the end block and the nut pair is gradually reduced, the pressing plates extend outwards and are pressed against the outer inner wall of the pipe body, and when four pressing plates act outwards on the inner wall of the pipe body simultaneously, stable clamping can be formed, and the position of the pipe body is ensured to be fixed in the drilling process.

2. The pressure of the outward action of the pressing plate is uniformly distributed on the inner wall of the pipe body, so that the pressing plate can be used for forming stable pressing to ensure the fixed position of the pipe body, and the pipe body can be prevented from being deformed due to overlarge single pressure.

3. When the distance between the end block and the nut pair is gradually increased, the pressing plate can extend inwards and finally is arranged in the straight groove, and when a separation state is formed between the pressing plate and the pipe body, the pipe body can be conveniently and rapidly extracted out by a worker.

4. Aiming at the pipe bodies with different pipe diameters, the staff can realize the clamping of the pipe bodies with different specifications by only adjusting the outward extending distance of the pressing plate, and the application range is obviously enlarged.

To sum up, through the anchor clamps that this scheme provided, when having solved the pipe fitting drilling, traditional design that carries out the centre gripping to the pipe fitting outer wall can lead to the problem of pipe fitting outer wall deformation, the inside cavity of this anchor clamps is with this anchor clamps from the port to insert in the pipeline, utilizes a plurality of briquetting outwards to extend from the inner wall of pipe fitting to carry out centre gripping locking by inside-out to the inner wall of pipe fitting, guarantee its fixed in position, the convenience drilling, also can avoid the pipe fitting to warp moreover.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a drilling jig according to the present utility model;

FIG. 2 is a schematic view of the inner structure of the mounting ring according to the present utility model;

fig. 3 is a schematic top view of a drilling fixture according to the present utility model.

In the figure: 1. a straight column; 2. a mounting ring; 3. a straight groove; 4. a drive gear; 5. a driven gear; 6. a transmission shaft; 7. a rotating handle; 8. a screw rod; 9. an end block; 10. a nut pair; 11. a connecting rod; 12. a pressing plate; 13. a tube body; 14. an anti-slip mat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In this embodiment, referring to fig. 1-3, a drilling fixture includes a straight column 1 and a tube 13, wherein a circle of straight grooves 3 distributed circumferentially are formed along the outer peripheral surface of the straight column 1, end blocks 9 are respectively arranged on the left side groove walls of the straight grooves 3, screw rods 8 are arranged on the side surfaces of the end blocks 9, nut pairs 10 are connected to the screw rods 8 in a threaded manner, the right ends of the screw rods 8 are in transmission connection with mounting rings 2 arranged on the right side inside the straight column 1, planetary gear structures rotating in a shaft connection manner with the screw rods 8 are arranged inside the mounting rings 2, and as can be seen in fig. 2, each planetary gear structure includes a driving gear 4 arranged in the middle and a plurality of driven gears 5 arranged on the outer sides of the driving gears 4, a rotating handle 7 is arranged at the outer ends of transmission shafts 6 arranged in the centers of the driving gears 4, the driven gears 5 are distributed on the outer sides of the driving gears 4 in the circumferential directions, and rotating shafts arranged in the centers of the driven gears 5 keep coaxial rotation with the screw rods 8 arranged in the straight grooves 3.

In practical applications, the number of driven gears 5 should be not less than three, and in this planetary gear structure, one driving gear 4 and four driven gears 5 are included. It is also particularly proposed that one end of the column 1 is inserted into the tube body 13, and the other end of the column 1 is further provided with a connection bracket, by which the entire column 1 is assembled onto a fixture, thereby securing the position of the entire column 1, so that a more specific manner of operation should be to fit the port of the tube body 13 over the column 1.

The rotation of the transmission shaft 6 can drive the four driven gears 5 and the screw rods 8 on the driven gears 5 to rotate simultaneously. The end block 9 and the nut pair 10 in the same straight groove 3 are respectively rotatably provided with a connecting rod 11, movable ends of the two connecting rods 11 are rotatably arranged on the same pressing plate 12, the straight column 1 is inserted inwards from a port of the pipe body 13, and the outer surface of the pressing plate 12 is provided with an anti-slip pad 14. The pressing plate 12 extends outward in the radial direction of the column 1 and is eventually pressed against the inner wall surface of the tube body 13.

When the pipe body 13 needs to be clamped, a worker rotates the rotating handle 7, so that the driven gear 5 rotates under the transmission of the driving gear 4, the screw rods 8 in the straight grooves 3 are controlled to rotate, and the distance between the end block 9 and the corresponding nut pair 10 is adjusted through the form of screw rod transmission:

when the distance between the end block 9 and the nut pair 10 is reduced, the pressing plates 12 outwards extend and press against the inner wall of the outer pipe body 13 under the transmission action of the connecting rod 11, and when the four pressing plates 12 simultaneously outwards act on the inner wall of the pipe body 13, stable clamping can be formed, so that the position of the pipe body 13 is ensured to be fixed in the drilling process. Because the pressing plates 12 are uniformly distributed along the circumferential direction, the four pressing plates 12 extend outwards uniformly, that is, the pressure exerted by the pressing plates 12 outwards is uniformly distributed on the inner wall of the pipe body 13, so that stable pressing can be formed by the pressing plates 12 to ensure the position fixing of the pipe body 13, and on the other hand, the deformation of the pipe body 13 caused by overlarge single pressure can be prevented;

when the distance between the end block 9 and the nut pair 10 is increased, the pressing plate 12 can extend inwards under the transmission action of the connecting rod 11 and finally is arranged in the straight groove 3, and when a separation state is formed between the pressing plate 12 and the pipe body 13, the pipe body 13 can be conveniently and rapidly extracted outwards by a worker, and the operation is convenient. It should be further specifically mentioned that the straight groove 3 should be kept to a certain depth, and that when the pressing plate 12 is completely built in the straight groove 3, the connecting rods 11 on both sides are not kept in a straight line, but have a certain bending angle, which is present in order to facilitate the next outward extension of the pressing plate 12.

Finally, the outward extending distance of the pressing plate 12 is adjustable, so that for the pipe bodies 13 with different pipe diameters, a worker can clamp the pipe bodies 13 with different specifications by only adjusting the outward extending distance of the pressing plate 12, and the application range is obviously enlarged.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The utility model provides a boring grab, its characterized in that includes straight post (1) and body (13), straight post (1) offer straight slot (3) of circumference distribution along its outer peripheral face round, the left side slot wall of straight slot (3) is provided with end block (9) respectively, and end block (9) side is provided with lead screw (8), and equal threaded connection has nut pair (10) on lead screw (8), the right-hand member of each lead screw (8) all with collar (2) transmission connection that the inside right side of straight post (1) set up, the inside of collar (2) is provided with the planetary gear structure that keeps the shaft coupling rotatory with each lead screw (8), rotates respectively on end block (9) and nut pair (10) in same straight slot (3) and installs connecting rod (11) to the loose end of two connecting rods (11) is all rotated and is installed on same clamp plate (12), the port of body (13) is inwards inserted, clamp plate (12) press the inner wall face of body (13).

2. A drilling jig according to claim 1, wherein the planetary gear structure comprises a plurality of driving gears (4) arranged in the middle and driven gears (5) arranged outside the driving gears (4), and the number of the driven gears (5) is not less than three.

3. A drilling jig according to claim 2, characterized in that the outer end of the centrally arranged drive shaft (6) of the drive gear (4) is provided with a turning handle (7).

4. A drilling jig according to claim 2, wherein the driven gears (5) are circumferentially distributed on the outer side of the driving gear (4), and the rotation shaft provided at the center of each driven gear (5) is kept coaxially rotated with the screw (8) provided in each straight groove (3).

5. A drilling jig according to claim 1, wherein the outer surface of the pressure plate (12) is provided with anti-slip pads (14).

6. A boring grab as claimed in claim 1, wherein the pressure plate (12) extends radially outwardly of the column (1).