CN210548312U

CN210548312U - Thread groove stepped drill

Info

Publication number: CN210548312U
Application number: CN201921117020.1U
Authority: CN
Inventors: 孙建峰
Original assignee: Yangzhou Juxing Hardware Tools Co Ltd
Current assignee: Yangzhou Juxing Hardware Tools Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-05-19
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a thread groove ladder bores, including the ladder drill body, ladder drill body central authorities run through and be provided with the fluted drill mounting hole, the fluted drill is fixed to be set up in the mounting hole, the fluted drill is provided with and connects drillstock and drill bit, connect drillstock fixed connection electric tool, the drill bit stretches out the ladder drill surface, be provided with the pinhole on the fluted drill, be provided with fixed bayonet lock on the ladder drill, the bayonet lock can move about, the ladder drill is fixed in the pinhole of fluted drill through the bayonet lock joint, be provided with cutting edge and chip groove on the ladder drill, the utility model discloses the device has the convenience of dismantling, practical long service life's advantage.

Description

Thread groove stepped drill

Technical Field

The utility model relates to a five metals technical field, concretely relates to thread groove ladder bores.

Background

Toper step drill is a combination tool that is used for drilling out the aperture round hole that varies on thinner panel, traditional step drill is equipped with two cutting screw threads and two chip removal grooves usually, its weight maldistribution, the concentricity is low, because the drill bit mainly plays the cutting action, telling under the operation, the degree of wear of drill bit is obviously higher than the degree of wear of step drill body, for better increase of service life, in the prior art, think the technical scheme who combines together fluted drill and step drill, the outstanding step drill's of drill bit body surface of fluted drill, fasten through fixing device between fluted drill and the step drill, can increase life through this design, simultaneously can also conveniently dismantle the change step drill.

Among the prior art, to the fixed mode of fluted drill and ladder drill, adopt to set up the draw-in groove on the ladder drill, set up the elasticity fixture block on the fluted drill, pound into the ladder drill with the fluted drill during the use, when taking out, take the crowbar to stick up and get, this design not only has the technical problem who connects insecure, still has long-term stick up and gets the elastic component wearing and tearing and the change that leads to and stick up and get and waste time and energy.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art, the life of ladder brill is low, and the fluted ladder brill of fluted twist drill and ladder brill perk get the trouble, the loaded down with trivial details technical problem of connected mode, the utility model provides a long service life, the fluted ladder brill of the fluted ladder of the fluted twist drill convenience of taking.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a thread groove ladder bores, includes the ladder drill body, ladder drill body central authorities run through and be provided with the fluted drill mounting hole, the fluted drill is fixed to be set up in the mounting hole, the fluted drill is provided with connection drillstock and drill bit, connection drillstock fixed connection electric tool, the drill bit stretches out the ladder drill surface, be provided with the pinhole on the fluted drill, be provided with fixing bayonet lock on the ladder drill, the bayonet lock can move about, the ladder drill is fixed in the pinhole of fluted drill through the bayonet lock joint, be provided with cutting edge and chip groove on the ladder drill.

Preferably, the stepped drill is conical, and the chip grooves on the stepped drill start on the first step of the stepped drill body and extend backwards in a spiral manner.

Preferably, 3 exhaust holes penetrate through the stepped drill body along the outer ring of the central hole.

Preferably, the position of the pin hole of the twist drill is provided with an annular groove, the width of the annular groove is as wide as the fixed overhead of the stepped drill, and the width of the pin hole is as wide as the annular groove.

Preferably, the fixed bayonet lock sets up first baffle in the outside of the ladder drill body, bores inside at the ladder and sets up the second baffle, and the ladder bores inside and sets up the recess, and the second baffle is placed in the recess, the recess opening is with wide with the fixed bayonet lock, set up the spring in the recess, the second baffle supports the spring.

The utility model has the advantages that: adopt fluted drill and ladder to bore the compound mode and be connected, not only convenient the dismantlement, still make things convenient for fluted drill to change simultaneously, can effectively improve the practical life of ladder brill, adopt bayonet lock joint pinhole before ladder brill and the fluted drill simultaneously, set up the spring in the bayonet lock and can stretch the extrusion, the overhead outer lane has the annular groove simultaneously, can make things convenient for the location joint.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the schematic view of the twist drill structure of the present invention.

Fig. 3 is a top view of the present invention shown in fig. 1.

3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 of 3 the 3 utility 3 model 3 a 3- 3 a 3. 3

In the figure, 1 is a connecting drill handle, 2 is a stepped drill body, 3 is a drill bit, 4 is a bayonet lock, 5 is a chip removal groove, 6 is an annular groove, 7 is a pin hole, 8 is an exhaust hole, 9 is a twist drill mounting hole, 10 is a cutting edge, 11 is a second clapboard, 12 is a first clapboard, 13 is a spring, and 14 is a groove.

Detailed Description

It is right that following combines the attached drawing the utility model discloses it is right to make further explanation, as a thread groove ladder bores shown in fig. 1, including

ladder drill body

2, 2 central authorities of ladder drill body run through and be provided with fluted drill mounting hole 9, the fluted drill is fixed to be set up in the mounting hole 9, the fluted drill is provided with and connects drillstock 1 and drill bit 3, connect drillstock 1 fixed connection electric tool, drill bit 3 stretches out the ladder drill surface, be provided with pinhole 7 on the fluted drill, be provided with fixed bayonet lock 4 on the fluted drill, bayonet lock 4 can move about, the ladder drill is fixed in the pinhole 7 of fluted drill through 4 joints of bayonet lock, be provided with cutting edge 10 and chip groove 5 on the ladder drill.

Further, wherein chip groove 5 begin on the first step of ladder drill body to the spiral extends backward, chip groove 5 sets up and bores the surface at the ladder, and chip groove 5 sets up for the symmetry, can guarantee under high-speed rotation that it is rotatory even, the chip removal is quick, is difficult for plugging up the ladder and bores.

Further, it is provided with 3 exhaust holes 8 to run through along centre bore 9 outer lane on the ladder bores the body, and wherein three exhaust hole 8 are even setting, and run through whole ladder and bore 2, can increase the throughput rate of air current under the high-speed rotation, increase the radiating effect.

Further, 7 peripheries of the pin holes arranged on the twist drill are provided with a circle of annular grooves 6, the groove width of the annular grooves 6 is consistent with the widths of the pin holes 7 and the fixed bayonet pins 4, the arranged annular grooves 6 can facilitate the positioning of the bayonet pins 4, and when the bayonet pins 4 are clamped to the annular grooves 6, the twist drill is rotated, so that the bayonet pins 4 can slide into the pin holes 7.

Further, for the convenience of bayonet 4 can block to pinhole 7 in, bayonet 4 need carry out concertina movement, and fixed bayonet 4 bores the body 2 outside at the ladder and sets up first baffle 12, bores 2 inside second baffles 11 that set up at the ladder, and the ladder bores inside recess 14 that sets up, and second baffle 11 is placed in

recess

14, 14 openings of recess and fixed bayonet 4 are with wide, set up spring 13 in the recess 14, second baffle 11 supports spring 13, and first baffle 12 and second baffle 11 all play spacing fixed action, and fixed bayonet 4 can realize flexible under the spring 13 effect.

The above description is a detailed description of the thread groove ladder drill according to the present invention, and the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art according to the technical solution of the present invention should be considered as the protection scope of the present invention without departing from the concept of the present invention.

Claims

1. The utility model provides a thread groove ladder bores, bores the body including the ladder, its characterized in that: ladder drill body central authorities run through and be provided with the fluted drill mounting hole, the fluted drill is fixed to be set up in the mounting hole, the fluted drill is provided with connection drillstock and drill bit, connection drillstock fixed connection electric tool, the drill bit stretches out the ladder drill surface, be provided with the pinhole on the fluted drill, be provided with fixed bayonet lock on the ladder drill, the bayonet lock can move about, fixed bayonet lock sets up first baffle in ladder drill body outside, at the inside second baffle that sets up of ladder drill, the inside recess that sets up of ladder drill, the second baffle is placed in the recess, groove opening and fixed bayonet lock are with wide, set up the spring in the recess, the second baffle supports the spring, the ladder drill is fixed in the pinhole of fluted drill through the bayonet lock, be provided with cutting edge and chip groove on the ladder drill.

2. The thread groove step drill of claim 1, wherein: the step drill is conical, and the chip grooves on the step drill start on the first step of the step drill body and extend backwards in a spiral mode.

3. The thread groove step drill of claim 1, wherein: 3 exhaust holes penetrate through the outer ring of the center hole on the stepped drill body.

4. The thread groove step drill of claim 1, wherein: the spiral drill is characterized in that an annular groove is formed in the position of the pin hole of the spiral drill, the width of the annular groove is as wide as the fixed overhead of the stepped drill, and the width of the pin hole is as wide as that of the annular groove.