CN210023999U

CN210023999U - Screw tap

Info

Publication number: CN210023999U
Application number: CN201920793075.8U
Authority: CN
Inventors: 崔耀中
Original assignee: Nanjing Nawei Precision Machinery Co Ltd
Current assignee: Nanjing Nawei Precision Machinery Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-07
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses a screw tap includes the centrum, and the one end of centrum is equipped with and is used for processing out internal screw thread spiral cutting edge on the work piece, is equipped with the chip groove along its axial on the centrum, still includes the awl seat, and the one end of awl seat is equipped with and is used for the connecting block with the driving shaft connection, and the one end that the spiral cutting edge was kept away from to the centrum is equipped with the inserted block, and the one end that the connecting block was kept away from to the awl seat is equipped with the slot that extends along its length direction, and the inserted block detachable inserts and establishes in the slot, is equipped with on. The screw tap can conveniently replace the cone part, the combination state of the cone and the cone seat is stable, and the screw tap can be prevented from falling off in the machining process.

Description

Screw tap

Technical Field

The utility model relates to a machining tool technical field, concretely relates to screw tap.

Background

A tap is a common hardware tool, also called a tap, which is axially grooved and is usually used to machine a cylindrical or conical internal thread on a workpiece. The tap is the most main tool for processing the internal thread in the manufacturing industry, is used in large quantities for a long time in the mechanical industry and related industries, and is a tool for manufacturing the internal thread with a large quantity and a wide range.

At present, in a tapping channel sequence of machining, a Morse taper installation method is generally adopted, namely a screw tap is fixed on a taper shank and then installed in a taper sleeve of a power output shaft. In addition, the screw tap is easy to break due to factors such as stress action, metal fatigue and the like in the process of machining the threaded hole, the replacement process is time-consuming and labor-consuming, and the production efficiency is influenced.

Disclosure of Invention

For overcoming the not enough of prior art, the utility model provides a screw tap, its change centrum part that can be convenient and the combination state of centrum and awl seat is comparatively stable, can avoid dropping in the course of working.

In order to realize the above-mentioned purpose, the utility model discloses a screw tap includes the centrum, the one end of centrum is equipped with and is used for processing out internal screw thread spiral cutting land on the work piece, be equipped with the chip groove along its axial on the centrum, still include the awl seat, the one end of awl seat is equipped with and is used for the connecting block with the driving shaft connection, the one end that the spiral cutting land was kept away from to the centrum is equipped with the inserted block, the one end that the connecting block was kept away from to the awl seat is equipped with the slot that extends along its length direction, inserted block detachable inserts and establishes in the slot, be equipped with on the.

Furthermore, locking mechanical system is including setting up the locking block on the inserted block, and the bottom of locking block is equipped with the elastic component, and the one end of elastic component is connected on the inserted block, and the elastic component produces the trend of pulling the locking block to the inserted block, and the bottom surface of locking block is equipped with the locking hemisphere, and the awl seat surface is equipped with and locks hemisphere complex locking hole.

Furthermore, the elastic part comprises an outer sleeve arranged at the bottom of the locking block, a spring hole is formed in the insertion block, an inner sleeve is arranged in the spring hole, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve, the inner sleeve is inserted into the outer sleeve, a locking spring is arranged in the spring hole, two ends of the locking spring are connected to the bottom of the spring hole and the bottom of the locking block respectively, and the locking spring is always in a stretching state.

Furthermore, the mouth of pipe of outer tube is equipped with the anticreep ring that extends to being close to outer tube axis direction, and the mouth of pipe of interior sleeve pipe is equipped with the spacing ring that extends to keeping away from interior sleeve pipe axis direction, and the spacing ring is mutually supported with the anticreep ring.

Further, an end of the insertion groove close to the locking hole is provided with an inclined guide surface.

Further, one side of the locking block close to the locking hemisphere is provided with a notch matched with the guide surface.

Further, the end of the insertion block is provided with a chamfer.

Furthermore, the outer diameter of the insertion block is the same as the inner diameter of the insertion groove, and the outer diameter of the cone is larger than that of the insertion block.

The utility model discloses a change centrum part that the screw tap can be convenient and the combination state of centrum and awl seat is comparatively stable, can avoid dropping in the course of working.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the whole tap according to the preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic view for embodying a vertebral body structure;

FIG. 5 is a side view for embodying a conical seat structure;

FIG. 6 is a cross-sectional view of the cone base.

Reference numerals: 1. a vertebral body; 11. a helical cutting margin; 12. a chip groove; 2. inserting a block; 21. chamfering; 3. a conical seat; 31. a locking hole; 4. a slot; 41. a guide surface; 5. connecting blocks; 6. a locking block; 61. a notch; 62. a locking hemisphere; 63. an outer sleeve; 631. the anti-drop ring; 64. an inner sleeve; 641. a limiting ring; 65. a locking spring.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 and 4, the tap according to the preferred embodiment of the present invention includes a cone 1 and a cone seat 3, wherein one end of the cone 1 is provided with a helical cutting edge 11 for processing an internal thread on a workpiece, a flute 12 is arranged on the cone 1 along the axial direction thereof, one end of the cone 1 away from the helical cutting edge 11 is provided with an insert 2, and the end of the insert 2 is provided with a chamfer 21.

As shown in fig. 5 and 6, one end of the conical seat 3 is provided with a connecting block 5 for connecting with a power shaft, one end of the conical seat 3 away from the connecting block 5 is provided with a slot 4 extending along the length direction thereof, one side of the slot 4 is open, and the end thereof is provided with an inclined guide surface 41.

As shown in fig. 2, the outer diameter of the insert 2 is the same as the inner diameter of the slot 4, and the outer diameter of the vertebral body 1 is larger than the outer diameter of the insert 2. The insert block 2 is detachably inserted into the slot 4, and a locking mechanism for locking the insert block 2 on the conical seat 3 is arranged on the insert block 2.

As shown in fig. 3, the locking mechanism includes a locking block 6 disposed on the insert block 2, a notch 61 is disposed at an end of the locking block 6 away from the vertebral body 1, a locking hemisphere 62 is disposed on a bottom surface of the locking block 6, and a locking hole 31 engaged with the locking hemisphere 62 is disposed on a surface of the conical seat 3. The bottom of the locking block 6 is provided with an elastic piece which is used for pulling the locking block 6 to the direction of the inserting block 2.

The elastic piece is equipped with the spring hole including setting up the outer tube 63 in the locking piece 6 bottom on the inserted block 2, is equipped with interior sleeve pipe 64 in the spring hole, and the external diameter of interior sleeve pipe 64 is less than the internal diameter of outer tube 63 and inserts and establish in outer tube 63, and the spring downthehole is equipped with locking spring 65, and the both ends of locking spring 65 are connected respectively at spring hole bottom and locking piece 6 bottom, and locking spring 65 is in tensile state all the time to can make locking piece 6 tend to the inserted block 2 direction all the time.

As shown in fig. 3, the outer tube 63 has a stopper ring 631 extending in a direction close to the axis of the outer tube 63 at the nozzle, the inner tube 64 has a stopper ring 641 extending in a direction away from the axis of the inner tube 64 at the nozzle, and the stopper ring 641 is fitted to the stopper ring 631. Damage to the spring when the locking block 6 is pulled out can be avoided.

The specific implementation process comprises the following steps: when the vertebral body 1 needs to be replaced, the locking block 6 is firstly pulled up to enable the locking hemisphere 62 to be separated from the locking hole 31, and then the vertebral body 1 is pulled out from the slot 4 to enable the vertebral body to be separated from the conical seat 3; the insert 2 of the replacement vertebral body 1 is then inserted directly into the slot 4, the chamfer 21 facilitating the insertion of the insert 2 during the sliding process, the guiding surface 41 and the notch 61 cooperating when the locking block 6 contacts the guiding surface 41, allowing the locking hemisphere 62 to slide more easily into the locking hole 31, and the fixation being completed after the locking hemisphere 62 has entered the locking hole 31.

The above detailed description merely describes the preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the design concept and spirit scope of the present invention, the ordinary skilled in the art should belong to the protection scope of the present invention according to the present invention provides the text description and drawings to the various modifications, replacements and improvements made by the technical solution of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. The utility model provides a screw tap, includes centrum (1), the one end of centrum (1) is equipped with and is used for processing out internal screw thread spiral cutting land (11) on the work piece, be equipped with chip groove (12) along its axial on centrum (1), characterized in that still includes awl seat (3), the one end of awl seat (3) is equipped with and is used for connecting block (5) with the driving shaft, the one end that spiral cutting land (11) were kept away from in centrum (1) is equipped with inserted block (2), the one end that connecting block (5) were kept away from in awl seat (3) is equipped with slot (4) that extend along its length direction, inserted block (2) detachable inserts and establishes in slot (4), be equipped with on inserted block (2) and be used for its locking mechanism on awl seat (3).

2. A tap according to claim 1, characterised in that the locking mechanism comprises a locking block (6) arranged on the insert block (2), the bottom of the locking block (6) is provided with a resilient member, one end of which is connected to the insert block (2), which resilient member tends to pull the locking block (6) towards the insert block (2), the bottom surface of the locking block (6) is provided with a locking hemisphere (62), and the surface of the conical seat (3) is provided with a locking hole (31) cooperating with the locking hemisphere (62).

3. The tap according to claim 2, characterized in that the elastic member comprises an outer sleeve (63) arranged at the bottom of the locking block (6), the insert (2) is provided with a spring hole, an inner sleeve (64) is arranged in the spring hole, the outer diameter of the inner sleeve (64) is smaller than the inner diameter of the outer sleeve (63) and is inserted in the outer sleeve (63), a locking spring (65) is arranged in the spring hole, two ends of the locking spring (65) are respectively connected to the bottom of the spring hole and the bottom of the locking block (6), and the locking spring (65) is always in a stretching state.

4. A tap according to claim 3, characterised in that the mouth of the outer sleeve (63) is provided with a run-off prevention ring (631) extending in a direction towards the axis of the outer sleeve (63), and that the mouth of the inner sleeve (64) is provided with a stop ring (641) extending in a direction away from the axis of the inner sleeve (64), the stop ring (641) co-operating with the run-off prevention ring (631).

5. A tap according to claim 2, characterised in that the end of the slot (4) adjacent the locking hole (31) is provided with a bevelled guiding surface (41).

6. A tap according to claim 5, characterised in that the side of the locking block (6) adjacent to the locking hemisphere (62) is provided with a notch (61) which cooperates with the guide surface (41).

7. Tap according to claim 1, characterised in that the end of the insert (2) is provided with a chamfer (21).

8. Tap according to claim 1, characterised in that the outer diameter of the insert (2) is the same as the inner diameter of the receptacle (4) and that the outer diameter of the cone (1) is larger than the outer diameter of the insert (2).