CN101823249A

CN101823249A - Quick chuck of screwdriver

Info

Publication number: CN101823249A
Application number: CN 201010142286
Authority: CN
Inventors: 孙延新
Original assignee: WUXI XINJU ELECTRIC TOOLS CO Ltd
Current assignee: WUXI XINJU ELECTRIC TOOLS CO Ltd
Priority date: 2010-03-24
Filing date: 2010-03-24
Publication date: 2010-09-08

Abstract

The invention relates to a quick chuck of a screwdriver. The structure of the quick is as follows: a mounting hole is arranged on an output shaft, an inner spring and the output shaft are coaxially arranged along with the mounting hole, and the inner spring is arranged at the bottom end part of the mounting hole; the output shaft corresponding to the position the mounting hole, is provided with an upper ball hole and a lower ball hole, an upper spacing sphere is arranged in the upper ball hole, and a lower spacing sphere is arranged in the lower ball hole; a core shaft is arranged in the inner spring, and an annular deboss is arranged on the core shaft along the periphery of the core shaft; a jacket and a rear sleeve are sheathed outside the output shaft, the inner wall of the jacket is provided with an upper convex edge and a lower convex edge of the inner wall of the jacket, and the outer wall of the core shaft above the rear sleeve is provided with a steel cable baffle ring; a gasket is arranged on the steel cable baffle ring, and an outer spring is arranged on the gasket; and the top end of the outer spring props against the lower convex edge of the inner wall of the jacket, the outer wall of the jacket is provided with a ring-shield, a pull sleeve is sheathed outside the jacket, and the pull sleeve is arranged on the ring-shield. The invention achieves the effects of convenience, speediness and labor saving in the process of installing and dismounting the screwdriver head.

Description

Quick chuck of screwdriver

Technical field

The present invention relates to a kind of clamping mechanism of electric tool, specifically a kind of quick chuck of screwdriver.

Background technology

Electronic small-sized screwdriver is to be used for specially playing and unload mechanism and wooden screw, also can bore aperture on plank or aluminium, and the replacing screwdriver bit is frequent thing.Common chuck need draw overcoat when changing the outfit screwdriver bit, be very much trouble.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and when the dress screwdriver bit, need not to spur overcoat, when withdrawing from screwdriver bit, only need overcoat is pulled down, screwdriver bit can eject and release automatically, need not to continue on the coat quick chuck of screwdriver firmly.

According to technical scheme provided by the invention, described quick chuck of screwdriver, comprise the installing hole that the output shaft top is offered, described along the coaxial setting of installing hole and output shaft, bottom at installing hole is placed with inner spring, offer ball hole and following ball hole on the output shaft of corresponding position of mounting hole, in last ball hole, be placed with the upper limit spheroid, be placed with the lower limit spheroid in the ball hole down, on inner spring, sit mandrel is arranged, the outer wall of mandrel is circumferentially with annular recess along it, is socketed with overcoat and back cover outside output shaft, and the inwall of overcoat has on the outer casing inner wall fin under the fin and outer casing inner wall, after being sitting in, the bottom of overcoat puts, mandrel outer wall above the cover of back is equipped with elastic spring, and sitting on elastic spring has pad, and sitting on pad has outer spring, the top of outer spring is against under the outer casing inner wall on the fin, at outer casing outer wall shaft block ring is installed, is connected at the overcoat overcoat and helps pull a cart, described helping pull a cart is sitting on the shaft block ring.

Outer wall is provided with antislip cog helping pull a cart.

The diameter of described upper limit spheroid is greater than the wall thickness of the output shaft at installing hole place, and the diameter of upper limit spheroid is less than or equal to the distance of inwall inwall of the overcoat of fin top to the outer casing inner wall of the output shaft at installing hole place.

The diameter of described lower limit spheroid is greater than the distance of the inwall of the output shaft at the installing hole place inwall of the overcoat of fin top under the outer casing inner wall.

The present invention need not to spur overcoat when the dress screwdriver bit, screwdriver bit is clamped automatically; When withdrawing from screwdriver bit, only need overcoat is pulled down, screwdriver bit can eject and release automatically, need not to continue firmly on the coat, thereby reaches convenient and swift labour-saving effect.

Description of drawings

Fig. 1 is the structural representation before the clamping screwdriver bit of the present invention.

Fig. 2 is the structural representation of screwdriver bit clamped condition of the present invention.

Fig. 3 is the structural representation of screwdriver bit exit status of the present invention.

The specific embodiment

The invention will be further described below in conjunction with concrete drawings and Examples.

As shown in the figure: this quick chuck of screwdriver, comprise the installing hole 11.3 that output shaft 11 tops are offered, described along installing hole 11.3 and output shaft 11 coaxial settings, be placed with inner spring 8 in the bottom of installing hole 11.3, offer ball hole 11.1 and following ball hole 11.2 on the output shaft 11 of corresponding installing hole 11.3 positions, in last ball hole 11.1, be placed with upper limit spheroid 9, be placed with lower limit spheroid 10 in the ball hole 11.2 down, on inner spring 8, sit mandrel 7 is arranged, the outer wall of mandrel 7 is circumferentially with annular recess 7.1 along it, outside output shaft 11, be socketed with overcoat 1 and back cover 12, the inwall of overcoat 1 has on the outer casing inner wall fin 1.2 under fin 1.1 and the outer casing inner wall, the bottom of overcoat 1 is sitting on the back cover 12, mandrel 7 outer walls above back cover 12 are equipped with elastic spring 6, on elastic spring 6, sit pad 5 is arranged, on pad 5, sit outer spring 4 is arranged, the top of outer spring 4 is against under the outer casing inner wall on the fin 1.2, at overcoat 1 outer wall shaft block ring 3 is installed, be socketed with outside overcoat 1 and help pull a cart 2, described helping pull a cart 2 is sitting on the shaft block ring 3.

2 outer walls are provided with antislip cog 2.1 helping pull a cart.

The diameter of described upper limit spheroid 9 is greater than the wall thickness of the output shaft 11 at installing hole 11.3 places, and the diameter of upper limit spheroid 9 is less than or equal to the distance of inwall inwall of the overcoat 1 of fin 1.1 tops to the outer casing inner wall of the output shaft 11 at installing hole 11.3 places.

The diameter of described lower limit spheroid 10 is greater than the distance of the inwall of the output shaft 11 at the installing hole 11.3 places inwall of the overcoat 1 of fin 1.2 tops under the outer casing inner wall.

The screwdriver bit of insertion standard is in the inner hexagonal hole of output shaft 11, screwdriver bit promotes mandrel 7 and moves down, lower limit spheroid 10 is pushed in the annular recess 7.1 of mandrel 7 by overcoat 1, overcoat 1 moves about 2 millimeters forward under the effect of outer spring 4, upper limit spheroid 9 is covered, upper limit spheroid 9 falls within the screwdriver bit groove, thereby pins screwdriver bit (stroke of overcoat is by 12 controls of back cover);

When need change screwdriver bit, when overcoat 1 is pulled down about 2 millimeters, lower limit spheroid 10 is moved up under the effect of inner spring 8 by mandrel 7 and blocks overcoat 1, and upper limit spheroid 9 drops in the room of the overcoat 1 of fin 1.1 tops on the outer casing inner wall, thereby removes the pinning to screwdriver bit.When mandrel 7 is mobile outward, screwdriver bit there is impetus forward, make things convenient for the taking-up of screwdriver bit.

Claims

1. quick chuck of screwdriver, it is characterized in that: comprise the installing hole (11.3) that output shaft (11) top is offered, described along installing hole (11.3) and the coaxial setting of output shaft (11), be placed with inner spring (8) in the bottom of installing hole (11.3), offer ball hole (11.1) and following ball hole (11.2) on the output shaft (11) of corresponding installing hole (11.3) position, in last ball hole (11.1), be placed with upper limit spheroid (9), be placed with lower limit spheroid (10) in the ball hole (11.2) down, go up seat at inner spring (8) mandrel (7) is arranged, the outer wall of mandrel (7) is circumferentially with annular recess (7.1) along it, outside output shaft (11), be socketed with overcoat (1) and back cover (12), the inwall of overcoat (1) has fin (1.2) under fin on the outer casing inner wall (1.1) and the outer casing inner wall, the bottom of overcoat (1) is sitting on the back cover (12), mandrel (7) outer wall in back cover (12) top is equipped with elastic spring (6), go up seat at elastic spring (6) pad (5) is arranged, go up seat at pad (5) outer spring (4) is arranged, the top of outer spring (4) is against on the fin under the outer casing inner wall (1.2), at overcoat (1) outer wall shaft block ring (3) is installed, be socketed with help pull a cart (2) outside overcoat (1), described helping pull a cart (2) is sitting on the shaft block ring (3).

2. quick chuck of screwdriver as claimed in claim 1 is characterized in that: (2) outer wall is provided with antislip cog (2.1) helping pull a cart.

3. quick chuck of screwdriver as claimed in claim 1, it is characterized in that: the wall thickness of the output shaft (11) that the diameter of described upper limit spheroid (9) is located greater than installing hole (11.3), and the distance of the diameter of upper limit spheroid (9) inwall that is less than or equal to the output shaft (11) that installing hole (11.3) locates inwall of the overcoat (1) of fin (1.1) top to the outer casing inner wall.

4. quick chuck of screwdriver as claimed in claim 1 is characterized in that: the distance of the inwall of the output shaft (11) that the diameter of described lower limit spheroid (10) is located greater than installing hole (11.3) inwall of the overcoat (1) of fin (1.2) top under the outer casing inner wall.