CN217991145U

CN217991145U - Quick chuck for saw blade of curve saw

Info

Publication number: CN217991145U
Application number: CN202221717524.9U
Authority: CN
Inventors: 张勤业; 李涛
Original assignee: Zhejiang Tongda Electrical Appliance Co ltd
Current assignee: Zhejiang Tongda Electrical Appliance Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-12-09
Anticipated expiration: 2032-07-04

Abstract

The utility model discloses to the rotatory harder shortcoming of lock tube among the prior art, provided a quick chuck of scroll saw blade belongs to electric tool technical field, reciprocating lever including the installation saw blade, threaded connection has quick locking mechanism on the reciprocating lever, quick locking mechanism includes synchronous pivoted lock tube and swivel nut, and the swivel nut cover is established outside the lock tube, be equipped with the symmetry on the swivel nut and be equipped with two and make things convenient for swivel nut pivoted handles. The handle is arranged on the rotary sleeve of the utility model, and the force can be more easily applied on the handle, so that the quick locking mechanism can be rotated by little force, and the installation and the removal of the saw blade can be realized; the torsional spring arranged between the reciprocating rod and the lock sleeve can prevent the lock sleeve from being off when the jig saw is used.

Description

Quick chuck for saw blade of curve saw

Technical Field

The utility model belongs to the technical field of electric tool, concretely relates to quick chuck of scroll saw blade.

Background

Current jig saw quick replacement chuck is disclosed as patent publication No. CN 169581 the utility model patent of the quick chuck of electronic jig saw, including folder, lock tube reset torsion spring, be equipped with the matched with screw thread of screwing that resets on lock tube and the folder, be equipped with the pressure spring in the folder chamber, be equipped with the location casting die of sliding positioning in the folder chamber before the pressure spring, be equipped with sword saw end constant head tank on the location casting die front end. The lock sleeve needs to be rotated when the saw blade is installed, and due to the action force of the pressure spring, the cylindrical lock sleeve is difficult to apply force, and the lock sleeve is hard to rotate.

Disclosure of Invention

The utility model discloses to the rotatory relatively hard shortcoming of lock tube among the prior art, provided a quick chuck of jig saw blade.

The invention aims to be realized by the following technical scheme: the utility model provides a quick chuck of scroll saw blade, is including the reciprocating lever of installation saw blade, threaded connection has quick locking mechanism on the reciprocating lever, quick locking mechanism includes synchronous pivoted lock sleeve and swivel sleeve, and the swivel sleeve cover is established outside the lock sleeve, be equipped with the symmetry on the swivel sleeve and be equipped with two and make things convenient for swivel sleeve pivoted handles.

In the scheme, the handle is arranged on the rotary sleeve, and force can be applied to the handle more easily, so that the quick locking mechanism can be rotated with little force, and the saw blade can be installed and detached.

Preferably, the lock sleeve comprises a threaded cavity and a rotating cavity, the threaded cavity is in threaded connection with the reciprocating rod, the end part of the reverse threaded cavity of the rotating cavity is symmetrically provided with limiting steps extending towards the center of the rotating cavity, and a gap exists between every two adjacent limiting steps. The space of two spacing steps constitutes the access way of saw blade, and when the mounting groove of installation saw blade on this access way and the reciprocating lever was parallel, the saw blade passed through in this access way installation entering mounting groove, rotatory lock sleeve made spacing step block the saw shoulder of saw blade to make the saw blade lock in the mounting groove of reciprocating lever.

Preferably, a plurality of friction ribs protruding outwards are uniformly distributed on the outer wall of the rotating cavity in a circle.

Preferably, the end part of the reciprocating rod in threaded connection with the lock sleeve is provided with a torsion spring, and the other end of the torsion spring is arranged in the lock sleeve. The torsional spring provides an action force in one direction for the lock sleeve, when the thread cavity of the lock sleeve is screwed out in the anticlockwise direction to install or replace the saw blade, the torsional spring provides a reverse force, and after the anticlockwise force applied to the lock sleeve is eliminated, the reverse force of the torsional spring can enable the thread cavity of the lock sleeve to rotate back to the original position instantly. The vibration force of the scroll saw can loosen the threaded cavity in the use process, but the threaded cavity can be prevented from loosening due to vibration due to the acting force of the torsion spring.

Preferably, the threaded cavity is provided with a first limiting section extending outwards, a first limiting cavity is arranged in the first limiting section and communicated with the threaded cavity, and one end of the pressure spring is arranged in the first limiting cavity.

Preferably, the rotating sleeve comprises a driving part and a limiting part, the driving part is sleeved outside the threaded cavity, the limiting part is sleeved outside the rotating cavity, two handles are symmetrically arranged on the driving part, and a second limiting cavity for accommodating the first limiting section is arranged on one handle. The second limit cavity on the handle limits the first limit section of the lock sleeve to rotate along with the rotation of the rotating sleeve.

Preferably, a plurality of friction cavities matched with the friction ribs of the rotating cavity are uniformly arranged on the inner ring of the limiting part in a circle. The cooperation of friction chamber and friction muscle makes lock sleeve and rotating sleeve rotate in step and can not appear skidding.

Preferably, the surface of the handle is provided with a concave-convex groove for increasing friction force.

Compared with the prior art, the utility model discloses following beneficial effect has:

the handle is arranged on the rotary sleeve, and force can be more easily applied to the handle, so that the quick locking mechanism can be rotated by little force, and the installation and the removal of the saw blade are realized; the torsional spring arranged between the reciprocating rod and the lock sleeve can prevent the lock sleeve from being off in the use process of the jig saw.

Drawings

Fig. 1 is a schematic structural view of the utility model;

fig. 2 is an exploded view of the structure of the utility model;

FIG. 3 is a schematic structural view of a rotating sleeve;

fig. 4 is a schematic structural view of the lock sleeve.

The labels in the figure are: 1. A reciprocating lever; 2. a saw blade; 21. sawing a shoulder; 3. a lock sleeve; 31. a threaded cavity; 32. a rotating chamber; 33. a first limiting section; 34. a first limiting cavity; 35. rubbing ribs; 36. a limiting step; 4. a rotating sleeve; 41. A drive section; 42. a limiting part; 43. a handle; 44. a second limiting cavity; 45. a friction chamber; 5. Compressing the spring; 6. and (4) entering and exiting the channel.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in fig. 1 to 4, a quick chuck for saw blade 2 of a jig saw comprises a reciprocating rod 1 provided with a saw blade 2, wherein the reciprocating rod 1 is connected with a quick locking mechanism through threads, the quick locking mechanism comprises a lock sleeve 3 and a rotating sleeve 4 which rotate synchronously, and the rotating sleeve 4 is sleeved outside the lock sleeve 3.

The lock sleeve 3 comprises a threaded cavity 31 and a rotating cavity 32, and a plurality of friction ribs 35 which protrude outwards are uniformly distributed on the outer wall of the rotating cavity 32 in a circle. The threaded cavity 31 is in threaded connection with the reciprocating rod 1, the end part of the reverse threaded cavity 31 of the rotating cavity 32 is symmetrically provided with a limiting step 36 extending towards the center of the rotating cavity 32, and a gap exists between every two adjacent limiting steps 36. The clearance of two spacing steps 36 constitutes the access way 6 of saw blade 2, and when this access way 6 was parallel with the mounting groove of the installation saw blade 2 on the reciprocating lever 1, the saw blade 2 installed into the mounting groove through this access way 6 in, rotatory lock sleeve 3 made spacing step 36 block the saw shoulder 21 of saw blade 2 to make the lock of saw blade 2 in the mounting groove of reciprocating lever 1.

The end portion of the reciprocating rod 1 in threaded connection with the lock sleeve 3 is provided with a torsion spring, the threaded cavity 31 is provided with a first limiting section 33 extending outwards, a first limiting cavity 34 is arranged in the first limiting section 33, the first limiting cavity 34 is communicated with the threaded cavity 31, and one end of the pressure spring 5 is arranged in the first limiting cavity 34. The torsion spring provides a reverse force to the lock casing 3 when the threaded cavity 31 of the lock casing 3 is rotated out of the way counterclockwise to mount or replace the saw blade 2, and the reverse force of the torsion spring can make the threaded cavity 31 of the lock casing 3 instantaneously rotate back to the original position when the counterclockwise force applied to the lock casing 3 is removed. The threaded cavity 31 may be loosened by the vibrating force of the jigsaw during use, but the loosening of the threaded cavity 31 due to vibration is prevented by the force of the torsion spring.

The rotating sleeve 4 comprises a driving part 41 and a limiting part 42, the driving part 41 is sleeved outside the threaded cavity 31, the limiting part 42 is sleeved outside the rotating cavity 32, two handles 43 are symmetrically arranged on the driving part 41, and a second limiting cavity 44 for accommodating the first limiting section 33 is arranged on one handle 43. The surface of the handle 43 is provided with concave-convex grooves for increasing friction force.

A plurality of friction cavities 45 matched with the friction ribs 35 of the rotating cavity 32 are uniformly arranged on the inner ring of the limiting part 42 in a circle. The cooperation of the friction cavity 45 and the friction rib 35 enables the lock sleeve 3 and the rotary sleeve 4 to synchronously rotate without slipping.

The use principle is as follows:

when saw blade 2 needs to be installed or replaced, the rotating sleeve 4 rotates anticlockwise through the handle 43, after the saw blade 2 is installed in place, the force on the rotating sleeve 4 is released, and due to the acting force relationship of the torsion spring, the lock sleeve 3 can rotate clockwise automatically to return to the original position, so that the saw blade 2 is locked.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a quick chuck of scroll saw blade, is including reciprocating lever (1) of installation saw blade (2), its characterized in that, threaded connection has quick locking mechanism on reciprocating lever (1), quick locking mechanism includes synchronous pivoted lock tube (3) and swivel nut (4), and swivel nut (4) cover is established outside lock tube (3), it is equipped with two convenient swivel nut pivoted handles (43) to be equipped with the symmetry on swivel nut (4).

2. The jigsaw blade quick chuck according to claim 1, wherein the lock sleeve (3) comprises a threaded cavity (31) and a rotating cavity (32), the threaded cavity (31) is in threaded connection with the reciprocating rod (1), the end of the rotating cavity (32) opposite to the threaded cavity (31) is symmetrically provided with a limit step (36) extending towards the center of the rotating cavity (32), and a gap exists between the adjacent limit steps (36).

3. The jig saw blade quick chuck according to claim 2, wherein a plurality of friction ribs (35) protruding outwards are uniformly distributed on the outer wall of the rotating cavity (32) in a circle.

4. The rapid chuck for jigsaw blade according to claim 1, wherein the reciprocating lever (1) screwed to the lock sleeve (3) is provided at its end with a torsion spring, the other end of which is disposed inside the lock sleeve (3).

5. The jig saw blade quick chuck according to claim 2, wherein the threaded cavity (31) is provided with a first limiting section (33) extending outwards, the first limiting section (33) is provided with a first limiting cavity (34), the first limiting cavity (34) is communicated with the threaded cavity (31), and one end of the pressure spring (5) is arranged in the first limiting cavity (34).

6. The quick chuck for jigsaw blades according to claim 1, wherein the rotating sleeve (4) includes a driving portion (41) and a position-limiting portion (42), the driving portion (41) is sleeved outside the threaded cavity (31), the position-limiting portion (42) is sleeved outside the rotating cavity (32), two handles (43) are symmetrically arranged on the driving portion (41), and one of the handles (43) is provided with a second position-limiting cavity (44) for accommodating the first position-limiting section (33).

7. The quick chuck for jigsaw blades according to claim 6, wherein the inner ring of the limit portion (42) is provided with a plurality of friction cavities (45) uniformly arranged around the circumference for engaging with the friction ribs (35) of the rotating cavity (32).

8. A jigsaw blade quick chuck according to claim 6, wherein said handle (43) is provided with friction enhancing recesses and protrusions on the surface.