CN212351804U

CN212351804U - Hand-press rotary screwdriver

Info

Publication number: CN212351804U
Application number: CN202021102932.4U
Authority: CN
Inventors: 曾富洪; 周兰花
Original assignee: Panzhihua University
Current assignee: Panzhihua University
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-01-15
Anticipated expiration: 2030-06-15

Abstract

The utility model discloses a rotatory screwdriver of hand in life instrument field, including screwdriver bit, lower part rotary drum and upper portion sleeve, screwdriver bit installs the lower extreme at the lower part rotary drum, and the upper end of lower part rotary drum is for having levogyration internal screw thread tubular structure, upper portion sleeve is equipped with in the upper portion sleeve with internal thread assorted rotatory dabber in the lower part rotary drum upper end, the upper end of rotatory dabber is connected for rotating with the telescopic upper end in upper portion, and rotatory dabber can only be clockwise rotation relatively to the upper portion sleeve. When pushing down the upper portion sleeve, rotatory dabber can drive the lower part rotary drum and rotate to twist the screw, and rotatory dabber rotates when shifting up the upper portion sleeve, does not influence the lower part sleeve, can realize the screwing up operation of screw through upper and lower moving upper portion sleeve repeatedly, and convenient and fast is particularly suitable for some inconvenient scenes of rotating the screwdriver with the hand, and the process of pushing down more is favorable to screwing up the screw.

Description

Hand-press rotary screwdriver

Technical Field

The utility model relates to a life instrument field especially relates to a rotatory screwdriver of hand.

Background

The screwdriver is a common screw tightening tool, and in some scenes that the screwdriver is inconvenient to rotate all the time by hands, the traditional screwdriver needs to be aligned with the screw opening again to perform tightening operation every time the traditional screwdriver rotates a small angle when an object is tightened, so that the efficiency is low, and the screw opening is easy to damage. Therefore, a screwdriver is designed to rotate in a one-way clearance small angle mode, repeated alignment of a screw opening can be avoided, but the screwdriver needs to be rotated forward and backward repeatedly, a screw cutter can easily slide out of the screw opening in the rotating process, and the operation efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect that current screwdriver exists, the utility model aims to solve the technical problem that: provides a hand-press rotary screwdriver which can tighten the screw more conveniently and efficiently.

The utility model provides a technical scheme that its technical problem adopted is:

the hand-press rotary screwdriver comprises a screwdriver head, a lower rotary drum and an upper sleeve, wherein the screwdriver head is installed at the lower end of the lower rotary drum, the upper end of the lower rotary drum is of a cylindrical structure with a left-handed internal thread, the upper sleeve is sleeved at the upper end of the lower rotary drum, a rotary mandrel matched with the internal thread is arranged in the upper sleeve, the upper end of the rotary mandrel is connected with the upper end of the upper sleeve in a rotating mode, and the rotary mandrel can only rotate clockwise relative to the upper sleeve.

Furthermore, a triangular groove is formed in the edge of the upper end of the rotating mandrel, a wedge-shaped space is formed by the triangular groove and the inner wall of the upper sleeve, a guide hole is formed in the side face of the triangular groove, a roller is arranged in the triangular groove, a spring and an ejector rod are arranged in the guide hole, and the roller is wedged tightly in the wedge-shaped space under the action of the spring and the ejector rod.

Furthermore, the triangular groove and the rollers, the ejector rods and the springs in the triangular groove and the triangular groove are arranged in a central symmetry mode around the axis of the rotating mandrel.

Furthermore, the upper end of the upper sleeve is provided with an openable end cover.

Furthermore, a first limiting table is arranged at a position, corresponding to the bottom of the internal thread, outside the lower rotary drum, a second limiting table is arranged outside the upper end of the lower rotary drum, a third limiting table is arranged in an opening at the lower end of the upper sleeve, and the third limiting table can only slide between the first limiting table and the second limiting table.

Furthermore, an upper key groove and a lower key groove are respectively formed in the outer portion of the lower end of the upper sleeve and the first limiting table of the lower rotary drum, a clutch sliding sleeve capable of sliding along the axis of the upper sleeve is arranged on the upper sleeve, and key grooves matched with the upper key groove and the lower key groove are formed in the clutch sliding sleeve.

Furthermore, the lower end of the lower rotary drum is provided with a hexagonal groove, the bottom of the groove is provided with a magnet, and the screwdriver head is detachably placed in the hexagonal groove.

Furthermore, a return spring is arranged in the lower rotary drum, one end of the return spring is abutted against the bottom of the cylindrical structure of the lower rotary drum, and the other end of the return spring is abutted against the end part of the rotary mandrel.

The utility model has the advantages that: through set up rotatory dabber between lower rotary drum and upper portion sleeve, utilize rotatory dabber and upper portion sleeve unidirectional rotation's characteristic, when pushing down upper portion sleeve, rotatory dabber can drive the lower part rotary drum and rotate, thereby the screw rotates, and rotatory dabber rotates when shifting up the upper portion sleeve, do not influence the lower part sleeve, through from top to bottom remove the upper portion sleeve repeatedly can realize the operation of screwing up of screw, and is convenient and fast, be particularly suitable for some inconvenient scenes of rotating the screwdriver with the hand, and the process of pushing down more is favorable to screwing up the screw.

Drawings

Fig. 1 is a sectional view of the structure of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a cross-sectional view of the rotary mandrel of the present invention.

Marked in the figure as 1-screwdriver head, 2-lower rotary drum, 3-upper sleeve, 4-rotary mandrel, 5-end cover, 6-clutch sliding sleeve, 7-return spring, 21-internal thread, 22-first limit platform, 23-second limit platform, 24-lower key groove, 25-hexagonal groove, 31-third limit platform, 32-upper key groove, 41-triangular groove, 42-guide hole, 43-roller, 44-spring and 45-ejector rod.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a rotatory screwdriver of hand, including screwdrivers blade 1, lower part rotary drum 2 and upper portion sleeve 3, screwdrivers blade 1 installs the lower extreme at lower part rotary drum 2, and the upper end of lower part rotary drum 2 is for having the tubular structure of levogyration internal thread 21, upper portion sleeve 3 cover is equipped with in upper portion sleeve 3 in lower part rotary drum 2 upper end, be equipped with in the upper portion sleeve 3 with internal thread 21 assorted rotatory dabber 4, the upper end of rotatory dabber 4 is connected for rotating with upper portion sleeve 2's upper end, and rotatory dabber 4 can only be relative upper portion sleeve 3 and do clockwise turning.

The utility model discloses a theory of operation is: firstly, the internal thread 21 and the thread on the rotary mandrel 4 in the application are left-handed threads, when the rotary mandrel 4 is required to enter the lower rotary drum 2, the lower sleeve 2 can only be rotated clockwise or the rotary mandrel 4 can only be rotated anticlockwise, and because the rotary mandrel 4 can only be rotated clockwise relative to the upper sleeve 3, when the upper sleeve 3 is pressed down, the rotary mandrel 4 cannot be rotated, and only the lower rotary drum 2 can be rotated clockwise, so that the screwdriver bit 1 can be rotated clockwise, and the screws can be tightened because the standard screws are right-handed threads; when the upper sleeve 3 is moved upwards, the rotary mandrel 4 can simultaneously rotate clockwise relative to the lower drum 2 and the upper sleeve 3, and the lower drum 2 does not need to rotate, so that the screwdriver bit 1 can be kept in contact with the screw. So move upper portion sleeve 3 from top to bottom repeatedly and can realize the screw-up, it is higher to move from top to bottom repeatedly than relapse just reversal efficiency to the process of pushing down more is favorable to screwing up the screw, is particularly suitable for some inconvenient scenes of rotating the screwdriver with the hand.

To how to realize that the unidirectional rotation of rotatory dabber 4 and upper portion sleeve 3 is connected, can adopt ratchet structure, the scheme that this application adopted is, as shown in fig. 3 the upper end edge of rotatory dabber 4 is equipped with triangular groove 41, and triangular groove 41 forms a wedge space with upper portion sleeve 3 inner wall, the side of triangular groove 41 is equipped with guide hole 42, is equipped with roller 43 in the triangular groove 41, is equipped with spring 44 and ejector pin 45 from inside to outside in the guide hole 42 in proper order, roller 43 wedges in the wedge space under the effect of spring 44 and ejector pin 45.

The working principle is as follows: when the rotating mandrel 4 wants to rotate clockwise, the roller 43 is subjected to the friction force of the inner wall of the upper sleeve 3, the component force of the friction force enables the roller 43 to move downwards, the ejector rod 45 and the spring 44 are compressed, and the rotation of the rotating mandrel 4 is not influenced; when the rotary spindle 4 is intended to rotate counterclockwise, the vertical component of the friction force of the inner wall of the upper sleeve 3 tends to move the rollers 43 upward, and the rollers 43 are wedged in the wedge-shaped spaces due to the small upper space, thereby preventing the rotary spindle 4 from rotating counterclockwise. The roller 43 is wedged in the wedge-shaped space, the one-way rotation of the rotating mandrel 4 is realized through friction force, certain flexibility is achieved, when the reaction of a screwed screw on the lower rotary drum 2 is larger than the friction force between the roller 43 and the upper sleeve 3, the counterclockwise rotation of the rotating mandrel 4 cannot be limited, and therefore the screw, the screwdriver bit 1 and a connected piece are protected to a certain extent.

In order to balance the force on the rotating mandrel 4, the triangular groove 41 and the internal roller 43, the ejector rod 45 and the spring 44 comprise two sets and are arranged in a central symmetry manner around the axis of the rotating mandrel 4. In order to facilitate assembly and maintenance, an openable end cap 5 is provided at the upper end of the upper sleeve 3. The axial positioning of the rotating mandrel 4 can be limited by the end cap 5 and the step surface on the upper sleeve 3.

A first limiting table 22 is arranged at a position, corresponding to the bottom of the internal thread 21, outside the lower rotary drum 2, a second limiting table 23 is arranged outside the upper end of the lower rotary drum 2, a third limiting table 31 is arranged in an opening at the lower end of the upper sleeve 3, and the third limiting table 31 can only slide between the first limiting table 22 and the second limiting table 23. When reciprocating upper portion sleeve 3, the stop gear that above-mentioned three spacing platform constitutes can avoid rotatory dabber 4 and lower part rotary drum 2 to drop, avoids rotatory dabber 4 to cause the impact damage to the bottom of lower part rotary drum 2 simultaneously.

Except that the screwdriver is rotated by hand pressure, the screwdriver can be used as a common screwdriver, and the specific scheme is that an upper key groove 32 and a lower key groove 24 are respectively arranged on the outer part of the lower end of the upper sleeve 3 and the first limiting table 22 of the lower rotary drum 2, a clutch sliding sleeve 6 capable of sliding along the axis of the upper sleeve 3 is arranged on the upper sleeve 3, and key grooves matched with the upper key groove 32 and the lower key groove 24 are arranged in the clutch sliding sleeve 6. After the upper sleeve 3 is slid to the lowest end, the upper key groove 32 is aligned with the lower key groove 24 by proper adjustment, and then the clutch sliding sleeve 6 is moved downward, so that the clutch sliding sleeve 6 is simultaneously clamped on the upper key groove 32 and the lower key groove 24, thereby the upper sleeve 3 and the lower sleeve 2 are connected into a whole, and the screwdriver bit can be rotated by rotating the upper sleeve 3 like a common screwdriver.

For the screwdriver head 1, in order to adapt to screws with different specifications, the lower end of the lower rotary drum 2 is provided with a hexagonal groove 25, the screwdriver head 1 is detachably placed in the hexagonal groove 25, so that different screwdriver heads can be replaced, and the bottom of the groove can be provided with a magnet, so that the screws can be conveniently adsorbed, and the operation convenience is improved.

Further, a return spring 7 is provided in the lower drum 2, and as shown in fig. 3, one end of the return spring 7 abuts against the bottom of the cylindrical structure of the lower drum 2, and the other end abuts against the end of the rotating spindle 4. After the return spring 7 is arranged, after the upper sleeve 3 is pressed down, the hand is loosened, the rotary mandrel 4 and the upper sleeve 3 can return to the upper end under the action of the return spring 7, so that the one-hand operation is realized, and the use convenience is further improved.

Claims

1. Hand rotary screwdriver, characterized by: including screwdriver head (1), lower part rotary drum (2) and upper portion sleeve (3), the lower extreme at lower part rotary drum (2) is installed in screwdriver head (1), and the upper end of lower part rotary drum (2) is the tubular structure who has levogyration internal thread (21), upper portion sleeve (3) cover is in lower part rotary drum (2) upper end, is equipped with in upper portion sleeve (3) with internal thread (21) assorted rotatory dabber (4), the upper end of rotatory dabber (4) is connected for rotating with the upper end of upper portion sleeve (3), and rotatory dabber (4) can only do clockwise rotation relatively upper portion sleeve (3).

2. The hand screw driver of claim 1 further characterized by: the edge of the upper end of the rotating mandrel (4) is provided with a triangular groove (41), the triangular groove (41) and the inner wall of the upper sleeve (3) form a wedge-shaped space, the side face of the triangular groove (41) is provided with a guide hole (42), a roller (43) is arranged in the triangular groove (41), a spring (44) and an ejector rod (45) are arranged in the guide hole (42), and the roller (43) is wedged tightly in the wedge-shaped space under the action of the spring (44) and the ejector rod (45).

3. The hand screw driver of claim 2 wherein: the triangular groove (41), the roller (43), the ejector rod (45) and the spring (44) in the triangular groove and the roller, the ejector rod (45) and the spring (44) are arranged in a central symmetry mode around the axis of the rotary mandrel (4).

4. The hand screw driver of claim 2 wherein: the upper end of the upper sleeve (3) is provided with an openable end cover (5).

5. The hand screw driver of claim 1 further characterized by: the outer portion of the lower rotating cylinder (2) is provided with a first limiting table (22) at a position corresponding to the bottom of the internal thread (21), the outer portion of the upper end of the lower rotating cylinder (2) is provided with a second limiting table (23), a third limiting table (31) is arranged in an opening in the lower end of the upper sleeve (3), and the third limiting table (31) can only slide between the first limiting table (22) and the second limiting table (23).

6. The hand screw driver of claim 5 further characterized by: an upper key groove (32) and a lower key groove (24) are respectively formed in the outer portion of the lower end of the upper sleeve (3) and a first limiting table (22) of the lower rotary drum (2), a clutch sliding sleeve (6) capable of sliding along the axis of the clutch sliding sleeve is arranged on the upper sleeve (3), and key grooves matched with the upper key groove (32) and the lower key groove (24) are formed in the clutch sliding sleeve (6).

7. A hand screw driver as claimed in any one of claims 1 to 6 wherein: the lower end of the lower rotating cylinder (2) is provided with a hexagonal groove (25), a magnet is arranged at the bottom of the groove, and the screwdriver head (1) is detachably placed in the hexagonal groove (25).

8. A hand screw driver as claimed in any one of claims 1 to 6 wherein: and a return spring (7) is arranged in the lower rotating drum (2), one end of the return spring (7) is abutted against the bottom of the cylindrical structure of the lower rotating drum (2), and the other end of the return spring is abutted against the end part of the rotating mandrel (4).