CN219766872U

CN219766872U - Ladder expansion drill

Info

Publication number: CN219766872U
Application number: CN202320589601.5U
Authority: CN
Inventors: 刘敏; 徐长青; 杨素平; 韩小健; 郁爱华
Original assignee: Jiangsu Jinyingliang Blades Co ltd
Current assignee: Jiangsu Jinyingliang Blades Co ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-09-29
Anticipated expiration: 2033-03-23

Abstract

The utility model discloses a ladder expansion drill, which comprises: the ladder drill body, the connecting module and the drill bit clamping module are arranged at the top and the bottom of the ladder drill body respectively, wherein a first connecting groove and a second connecting groove are formed in the top and the bottom of the ladder drill body respectively, and a threaded hole is formed in the first connecting groove; the connecting module comprises a connecting block, a cylindrical connecting disc and a fixing bolt, wherein the bottom surface of the connecting disc is contacted with the bottom surface of the first connecting groove, and the connecting block is fixedly connected with the upper surface of the connecting disc; the clamping device is composed of a countersunk head threaded hole, a hexagonal bolt, a semicircular table clamping block, a sliding groove and a sliding block, wherein the clamping module comprises two clamping devices, the countersunk head threaded hole is formed in the cylindrical surface of the clamp shell, the hexagonal bolt is fixedly connected with the semicircular table clamping block, the sliding block is fixedly connected to the circular table cambered surface of the semicircular table clamping block, the sliding groove is formed in the position, corresponding to the inner side of the circular table cambered surface of the clamp shell, of the sliding groove, and the sliding groove is in sliding connection with the sliding block. Through the structure, the drill bit is convenient to install and disassemble.

Description

Ladder expansion drill

Technical Field

The utility model relates to the field of industrial cutters, in particular to a stepped expansion drill.

Background

The step expansion drill is also called a step drill or a pagoda drill, is mainly used for drilling holes in a thin steel plate within 3mm, can replace a plurality of drill bits for use, processes holes with different diameters according to requirements, can realize one-time processing of large holes, and does not need to replace drill bits, drill positioning holes and the like.

The Chinese patent with the patent number of CN216607356U is found through searching when the patent is applied: the utility model provides a ladder of easy dismounting drill bit bores, includes hexagonal groove, characterized by: the second hexagonal groove that the cylinder groove lower extreme was seted up to and the screw hole of seting up is arranged to second hexagonal groove upper end, the installed part is including installing in the drill bit on ladder bore body top, and the first hexagonal post that drill bit central authorities set up. The hexagonal bolt is used for connecting the drill bit and the drill body in a threaded manner, the relation between the threaded connection direction and the rotating direction of the main shaft is not described, if the connection strength between the drill bit and the drill body is the same as the rotating direction of the main shaft, the drill bit can fall off when drilling, if the connection strength is opposite to the rotating direction of the main shaft, the drill bit is high enough, but the threaded connection between the bolt and the drill bit is tightly fastened in the rotating process of the rotating head due to the opposite rotating direction of the main shaft of the lathe, and the threaded connection between the drill bit and the drill bit is difficult to be opened simply by means of machinery and manpower, so that the advantage of easy disassembly and replacement of the drill bit is lost, and the drill bit needs to be improved.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art and provides a stepped expansion drill, which uses a clamping mechanism to clamp a drill bit so that the drill bit has the capability of easy disassembly and replacement.

The utility model also provides a ladder expansion drill with the structure, which comprises the following components: the ladder drill body, the connecting module and the drill bit clamping module are arranged at the top and the bottom of the ladder drill body respectively, wherein a first connecting groove and a second connecting groove are formed in the top and the bottom of the ladder drill body respectively, and a threaded hole is formed in the first connecting groove;

the connection module includes: the bottom surface of the connecting disc contacts with the bottom surface of the first connecting groove, the fixing bolt penetrates through the connecting disc to be in threaded connection with the threaded hole, and the connecting block is fixedly connected with the upper surface of the connecting disc;

the bit clamping module includes: the clamp comprises a clamp shell, a semicircular table clamping block, a hexagonal bolt, a countersunk threaded hole, a sliding block and a sliding groove; the fixture comprises a fixture shell, and is characterized in that the fixture shell is a round table which is vertically penetrated, the bottom of the fixture shell is fixedly connected to the horizontal inner side surface of a connecting groove II, a countersunk threaded hole, a hexagonal bolt, a semicircular table clamping block, a sliding groove and a sliding block form a clamping device, the clamping module comprises two clamping devices, the countersunk threaded hole is formed in the cylindrical surface of the fixture shell, the hexagonal bolt is matched with the countersunk threaded hole, the hexagonal bolt penetrates through the semicircular table clamping block fixedly connected with the end surface of the threaded hole, the sliding block is fixedly connected to the cambered surface of the round table of the semicircular table clamping block, the sliding block is provided with the sliding groove corresponding to the inner side of the cambered surface of the round table of the fixture shell, and the sliding groove is in sliding connection with the sliding block, so that the drill bit is convenient to detach after being worn when being clamped.

According to the step expansion drill, the two clamping devices are parallel to each other, so that the drill bit can be conveniently clamped.

According to the step expansion drill, the step drill body further comprises a chip removal port formed in one side of the outer end. Facilitating the circulation of chips during the step drilling of the holes.

According to the step expansion drill, the threaded holes are distributed annularly around the connecting block. The connection module is convenient to install.

According to the ladder expansion drill, the drill bit is arranged in the second connecting groove, the bottom end of the drill bit is contacted with the horizontal inner side wall of the second connecting groove, and the drill bit is arranged between the two semicircular table clamping blocks, so that the drill bit is conveniently clamped.

According to the ladder expansion drill, the shape of one side surface of the semicircular table clamping table, which is far away from the clamp shell, is matched with the cylindrical surface of the drill bit. The semicircular table clamping blocks can wrap the cylindrical surface of the drill bit.

According to the step expansion drill, the internal shape and the size of the connecting groove are matched with those of the connecting disc. Is convenient for installing and fixing the connecting disc.

According to the step expansion drill, the internal shape and the size of the connecting groove II are matched with the shape and the size surrounded by the end face of the top end of the clamp shell. The fixture is convenient to install and fix the fixture shell.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a diagram showing the construction of a step expansion drill according to the present utility model;

FIG. 2 is a cross-sectional view of a step expansion drill of the present utility model;

FIG. 3 is a partial enlarged view of the construction of the A-position of the step expansion drill according to the present utility model;

fig. 4 is a cross-sectional view of a step drill body of a step expansion drill of the present utility model.

Legend description:

1. a step drill body; 4. a first connecting groove; 5. a second connecting groove; 6. a threaded hole; 10. a drill bit; 11. a chip removal port;

201. a connecting disc; 202. a connecting block; 203. a fixing bolt;

301. a clamp housing; 302. a hexagonal bolt; 303. countersunk threaded holes; 304. a half round platform clamping block; 305. a slide block; 306. and a sliding groove.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Referring to fig. 1-4, the stepped expansion drill of the embodiment of the utility model comprises a stepped drill body 1, a drill bit 10, a connecting module and a drill bit 10 clamping module, wherein a connecting groove I4 and a connecting groove II 5 are respectively arranged at the top and the bottom of the stepped drill body 1, and a threaded hole 6 is arranged on the horizontal plane of the connecting groove I4;

the connection module includes: the connecting block 202, the cylindrical connecting disc 201 and the fixing bolt 203, the bottom surface of the connecting disc 201 is contacted with the bottom surface of the first connecting groove 4, the fixing bolt 203 penetrates through the connecting disc 201 to be in threaded connection with the threaded hole 6, and the connecting block 202 is fixedly connected with the upper surface of the connecting disc 201; tightening the fixing bolt 203 can firmly fix the connection module to the step drill body 1.

The clamping module includes: the clamp comprises a clamp shell 301, a semicircular table clamping block 304, a hexagonal bolt 302, a countersunk threaded hole 303, a sliding block 305 and a sliding chute 306; the fixture housing 301 is a round table penetrating up and down, the bottom of the fixture housing 301 is fixedly connected to the horizontal inner side face of the connecting groove II 5, the countersunk threaded hole 303, the hexagonal bolt 302, the semicircular table clamping block 304, the sliding groove 306 and the sliding block 305 form a clamping device, the clamping module comprises two clamping devices, the countersunk threaded hole 303 is located on the cylindrical surface of the fixture housing 301, the hexagonal bolt 302 is also matched with the countersunk threaded hole 303, the hexagonal bolt 302 penetrates through the end face of the threaded hole 6 to be fixedly connected with the semicircular table clamping block 304, the sliding block 305 is fixedly connected to the round table cambered surface of the semicircular table clamping block 304, the sliding groove 306 is arranged at the position, corresponding to the inner side of the round table cambered surface of the fixture housing 301, of the sliding groove 306 and the sliding block 305, and the drill bit 10 are slidably connected between the two semicircular table clamping blocks 304. When the drill bit 10 is installed, the drill bit 10 is plugged in, the top end of the drill bit 10 contacts the horizontal inner wall of the connecting groove II 5, so that downward force of the stepped drill body 1 is obtained to offset after the drill bit 10 is cut and subjected to upward pressure, at the moment, after the two hexagonal bolts 302 are screwed, the hexagonal bolts 302 rotate to enable the half round table clamping block 304 to rotate and move forward, and because the sliding block 305 is limited by the sliding groove 306 to rotate, the sliding block 305 also limits the rotation of the half round table clamping block 304, so that the half round table clamping block 304 can only move forward through the matching of the sliding block 305 and the sliding groove 306, and the half round table clamping block 304 is clamped;

the stepped drill body 1 further comprises a chip removal port 11 formed in one side of the outer end. The chips cut when the stepped shaft drill starts to rotate can be discharged through the exhaust port 11.

Working principle: the stepped drill body 1 is connected with the threaded hole 6 by using the fixing bolt 203 in cooperation with the connecting disc 201, so that the operation is convenient and easy. When the drill bit 10 is connected, the drill bit 10 is plugged between the two semicircular table clamping blocks 304, the top end of the drill bit 10 is contacted with the horizontal inner wall of the second connecting groove 5, so that a supporting force is obtained after the drill bit 10 is cut and subjected to upward pressure, at the moment, after the two hexagonal bolts 302 are screwed, the hexagonal bolts 302 rotate, so that the semicircular table clamping blocks 304 rotate and move forward, and because the sliding blocks 305 are limited by the sliding grooves 306 to rotate, the sliding blocks 305 also limit the rotation of the semicircular table clamping blocks 304, so that the semicircular table clamping blocks 304 can only move forward through the matching of the sliding blocks 305 and the sliding grooves 306, and the semicircular table clamping blocks 304 are clamped; after the drill bit 10 is worn, the hexagon bolts 302 are unscrewed, so that the half round table clamping blocks 304 move backwards through the cooperation of the sliding blocks 305 and the sliding grooves 306, the two half round table clamping blocks 304 loosen the worn drill bit 10, and at the moment, the worn drill bit 10 is not clamped, and the worn drill bit 10 can be removed for replacement.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A step expansion drill, comprising: the ladder drill body (1), the connecting module and the drill bit (10) clamping module are arranged at the top and the bottom of the ladder drill body (1) respectively, a first connecting groove (4) and a second connecting groove (5) are formed in the top and the bottom of the ladder drill body (1), and a threaded hole (6) is formed in the first connecting groove (4);

the connection module includes: the connecting device comprises a connecting block (202), a cylindrical connecting disc (201) and a fixing bolt (203), wherein the bottom surface of the connecting disc (201) contacts with the bottom surface of a first connecting groove (4), the fixing bolt (203) penetrates through the connecting disc (201) to be in threaded connection with a threaded hole (6), and the connecting block (202) is fixedly connected with the upper surface of the connecting disc (201);

the drill bit (10) clamping module comprises: the clamp comprises a clamp shell (301), a semicircular table clamping block (304), a hexagonal bolt (302), a countersunk threaded hole (303), a sliding block (305) and a sliding groove (306); the fixture comprises a fixture housing (301) and is characterized in that the fixture housing (301) is a round table penetrating up and down, the bottom of the fixture housing (301) is fixedly connected to the horizontal inner side face of a connecting groove II (5), a countersunk threaded hole (303), a hexagonal bolt (302), a semicircular table clamping block (304), a sliding groove (306) and a sliding block (305) form a clamping device, the clamping module comprises two clamping devices, the countersunk threaded hole (303) is located on the cylindrical surface of the fixture housing (301), the hexagonal bolt (302) is matched with the countersunk threaded hole (303) mutually, the hexagonal bolt (302) penetrates through the end face of the threaded hole (6) and is fixedly connected with the semicircular table clamping block (304), the sliding block (305) is fixedly connected to the circular table cambered surface of the semicircular table clamping block (304), the sliding groove (306) is arranged at the inner side of the circular table cambered surface of the sliding block (305) corresponding to the fixture housing (301), and the sliding groove (306) is in sliding connection with the sliding block (305).

2. The stair expansion drill according to claim 1, wherein said two clamping means are parallel to each other.

3. The stair expansion drill according to claim 1, wherein: the stepped drill body (1) further comprises a chip removal port (11) formed in one side of the outer end.

4. A step extension drill according to claim 1, characterized in that the threaded holes (6) are distributed annularly around the connection block (202).

5. The stair expansion drill according to claim 1, further comprising a drill bit (10), wherein the drill bit (10) is in the second connecting groove (5) and the bottom end of the drill bit (10) contacts the horizontal inner side wall of the second connecting groove (5), and the drill bit (10) is between two semicircular table clamping blocks (304).

6. The stair expansion drill according to claim 5, wherein the semicircular table clamping block (304) is matched with the cylindrical surface of the drill bit (10) away from the side surface of the clamp housing (301).

7. The ladder expansion drill of claim 1, wherein the inner shape and size of the first connecting groove (4) are matched with the shape and size of the connecting disc (201).

8. The ladder expansion drill according to claim 1, characterized in that the internal shape and size of the second connecting groove (5) are matched with the shape and size enclosed by the top end surface of the clamp housing (301).