CN212763217U

CN212763217U - Manual-automatic integrated electric screwdriver with self-locking structure

Info

Publication number: CN212763217U
Application number: CN202021081915.7U
Authority: CN
Inventors: 武子海
Original assignee: Ningbo Mingtong Hardware Tools Co ltd
Current assignee: Ningbo Mingtong Hardware Tools Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-03-23
Anticipated expiration: 2030-06-12

Abstract

The utility model relates to the technical field of electric tools, in particular to a manual-automatic integrated electric screwdriver with a self-locking structure; the self-locking device comprises a main body, wherein a self-locking mechanism is arranged in a front port of the main body, and an output sleeve matched and connected with the self-locking mechanism is arranged on the self-locking mechanism; the main body is fixedly connected with the self-locking mechanism so as to drive the output sleeve to rotate integrally; a driving motor is arranged in the main body and is in transmission connection with the self-locking mechanism so as to drive the output sleeve to rotate on the main body; the utility model has reasonable structure, the screwdriver realizes manual and automatic self-switching through the self-locking structure, and the operation is more convenient; overall structure is simple, and convenient assembling can effectively reduce manufacturing cost.

Description

Manual-automatic integrated electric screwdriver with self-locking structure

Technical Field

The utility model relates to an electric tool technical field specifically indicates a take manual-automatic electric screwdriver of auto-lock structure.

Background

The electric screwdriver is also called an automatic screwdriver, an electric screwdriver and the like, mainly realizes power output by driving a screwdriver head to rotate through a motor, and is generally suitable for dismounting screws. Because electric screwdriver output torsion is not big, consequently current electric screwdriver has electronic and manual two kinds of functions concurrently usually, when screwing up the operation, can screw up through electric mode in advance earlier, and the screw is further screwed up to rethread manual mode, and when dismantling the screw, then can loosen the screw through manual mode earlier, rethread electric mode is demolishd the screw.

Chinese patent CN203696883U discloses an electric screwdriver with manual and automatic functions, which is based on the electric screwdriver, the bottom of the casing is designed to be a clamping plate capable of clamping the output shaft, and the clamping plate is matched with the structure for clamping the output shaft by screwing the cap to drive the inclined plane to move axially, so as to prevent the output shaft of the electric screwdriver from rotating, thus the screw can be screwed manually by the electric screwdriver, and the electric screwdriver has both manual and automatic functions. However, because the bottom of the shell is required to be provided with the clamping plate, and the rotating cap matched with the clamping plate is arranged, a user is required to rotate the nut to perform automatic and manual switching during use, the structure is complex to set, the manufacturing cost is high, the assembly is inconvenient, the operation is complicated and inconvenient, and the actual use requirement of the user is difficult to meet. Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rational in infrastructure, convenient to use's manual-automatic electric screwdriver of taking auto-lock structure to prior art's defect and not enough.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model relates to a manual-automatic integrated electric screwdriver with a self-locking structure, which comprises a main body, wherein a self-locking mechanism is arranged in the front port of the main body, and an output sleeve which is connected with the self-locking mechanism in a matching way is arranged on the self-locking mechanism; the main body is fixedly connected with the self-locking mechanism so as to drive the output sleeve to rotate integrally; a driving motor is arranged in the main body and is in transmission connection with the self-locking mechanism so as to drive the output sleeve to rotate on the main body.

According to the scheme, the self-locking mechanism comprises a locking sleeve and a coupler, the locking sleeve is arranged in the front port of the main body in a penetrating mode and is fixedly connected with the main body, the coupler is rotatably arranged in the locking sleeve in a penetrating mode, and an output shaft of the driving motor is in transmission connection with the coupler; and a locking structure is arranged among the output sleeve, the coupler and the locking sleeve.

According to the scheme, the locking structure comprises a locking shaft and a tensioning roller, a plurality of bearing bushes are arranged on the front side of the coupler, and the bearing bushes are arranged around the coupler at equal angular intervals to form an annular sector between every two adjacent bearing bushes; the locking shaft penetrates through the bearing bushes, the rear end of the output sleeve is fixedly connected with the locking shaft, and a plurality of outer edge tangent planes are arranged on the locking shaft; the tensioning rollers are arranged between the inner edge surface of the locking sleeve and the corresponding outer edge tangent plane, and any tensioning roller is rotatably arranged in the corresponding annular sector.

According to the scheme, three bearing bushes are arranged on the coupler at equal angular intervals to form three annular sectors, three outer edge tangent planes corresponding to the annular sectors are arranged on the locking shaft, and the three annular sectors are provided with the tensioning rollers in one-to-one correspondence.

According to above scheme, be equipped with the spacing ring between locking axle and the output sleeve, the front end of lock sleeve is equipped with guide sleeve, and output sleeve rotationally wears to locate in the guide sleeve, and the spacing ring is contradicted and is connected on guide sleeve's interior terminal surface.

According to the scheme, the main body comprises an outer shell cover, an upper inner shell and a lower inner shell, the upper inner shell and the lower inner shell are butted to form a front port and an installation inner cavity of the main body, and an integrated structure formed by the upper inner shell and the lower inner shell penetrates through the outer shell cover; and a power supply and a control mechanism are arranged in the mounting inner cavity, and the control mechanism is respectively electrically connected with the driving motor and the power supply.

The utility model discloses beneficial effect does: the utility model has reasonable structure, the screwdriver realizes manual and automatic self-switching through the self-locking structure, and the operation is more convenient; overall structure is simple, and convenient assembling can effectively reduce manufacturing cost.

Drawings

Fig. 1 is a schematic diagram of the overall explosion structure of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

fig. 3 is a schematic view of the overall cross-sectional structure of the present invention;

fig. 4 is an enlarged schematic view of part B of fig. 3.

In the figure: 1. a main body; 2. an output sleeve; 3. a locking sleeve; 4. a coupling; 11. a drive motor; 12. a housing cover; 13. an upper inner shell; 14. a lower inner shell; 15. a power source; 16. a control mechanism; 21. locking the shaft; 22. cutting the outer edge; 23. a limiting ring; 31. a guide sleeve; 41. a tensioning roller; 42. bearing bushes; 43. an annular sector.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings and examples.

As shown in fig. 1, the manual-automatic integrated electric screwdriver with the self-locking structure of the present invention comprises a main body 1, wherein a self-locking mechanism is arranged in a front port of the main body 1, and an output sleeve 2 cooperatively connected with the self-locking mechanism is arranged on the self-locking mechanism; the main body 1 is fixedly connected with the self-locking mechanism so as to drive the output sleeve 2 to rotate integrally; a driving motor 11 is arranged in the main body 1, and the driving motor 11 is in transmission connection with the self-locking mechanism so as to drive the output sleeve 2 to rotate on the main body 1; the main body 1 and the self-locking mechanism can integrally rotate to form a manual mode, and the self-locking mechanism establishes a transmission relation between the main body 1 and the output sleeve 2 so as to drive the output sleeve 2 to work through the rotation of the main body 1; when the driving motor 11 works, the output sleeve 2 can be driven by the self-locking mechanism to transmit on the main body 1, so that the automatic mode of the screwdriver is realized.

The self-locking mechanism comprises a locking sleeve 3 and a coupler 4, the locking sleeve 3 is arranged in the front port of the main body 1 in a penetrating mode and is fixedly connected with the locking sleeve, the coupler 4 is rotatably arranged in the locking sleeve 3 in a penetrating mode, and an output shaft of the driving motor 11 is in transmission connection with the coupler 4; a locking structure is arranged among the output sleeve 2, the coupler 4 and the locking sleeve 3; in a manual mode, the main body 1 actively rotates to drive the locking sleeve 3 to synchronously rotate, and the locking sleeve 3 can drive the output sleeve 2 to synchronously rotate as the locking structure between the locking sleeve 3 and the output sleeve 2 is locked due to instability of torque of the main body 1; in the automatic mode, the main body 1 does not rotate as a handle of a screwdriver, the driving motor 11 drives the coupler 4 to rotate at the moment, and the coupler 4 pushes the output sleeve 2 to rotate in the locking sleeve 3 through a locking structure.

The locking structure comprises a locking shaft 21 and a tensioning roller 41, a plurality of bearing bushes 42 are arranged on the front side of the coupler 4, and the bearing bushes 42 are arranged around the coupler 4 at equal angular intervals to form an annular sector 43 between every two adjacent bearing bushes 42; the locking shaft 21 penetrates through the bearing bushes 42, the rear end of the output sleeve 2 is fixedly connected with the locking shaft 21, and a plurality of outer edge tangent planes 22 are arranged on the locking shaft 21; the tensioning rollers 41 are arranged between the inner edge surface of the locking sleeve 3 and the corresponding outer edge tangent plane 22, and any tensioning roller 41 is rotatably arranged in the corresponding annular sector 43; a movable cavity is formed among the inner edge surface of the locking sleeve 3, the annular sector 43 and the outer edge tangent plane 22, and the tensioning roller 41 can move in the movable cavity.

The utility model discloses a theory of operation:

when the screwdriver is in a manual mode, the main body 1 and the locking sleeve 3 synchronously rotate, the driving motor 1 and the coupler 4 have certain self-locking force, the locking sleeve 3 can drive the tensioning roller 41 to roll towards one side of the movable cavity, the middle part of the movable cavity is the largest in chord height, the two end parts tend to be closed, the tensioning roller 41 is in contact with the upper inner wall and the lower inner wall of the movable cavity, namely the inner edge tangent plane 22 and the outer edge tangent plane 22 of the locking sleeve 3, and the tensioning roller 41 enables the locking sleeve 3 and the locking shaft 21 to be locked to form transmission connection under the action of friction force, so that the output sleeve 2 can be driven to rotate.

When the screwdriver is in an automatic mode, an output shaft of the driving motor 11 in the main body 1 rotates to drive the coupler 4 to rotate at a constant speed, firstly, the coupler 4 rotates at a certain angle relative to the locking shaft 22, at this time, the bearing bush 42 pushes the tensioning roller 41 to move along the outer edge tangent plane, when the tensioning roller 41 moves to the edge of the outer edge tangent plane, due to the limitation of the inner edge surface of the locking sleeve 3, the tensioning roller 41 cannot continue to move relative to the output sleeve 2, so that the coupler 4 can drive the output sleeve 2 to rotate through the tensioning roller 41 at this time, in the process, because the coupler 4 rotates at a constant speed, after the tensioning roller 41 moves to the edge of the outer edge tangent plane, the coupler 4 cannot be clamped by the inner edge surface of the locking sleeve 3, and can push the output sleeve 2 to rotate.

The utility model preferably adopts the shaft coupling 4 to be provided with three bearing bushes 42 at equal angular intervals to form three annular sectors 43, the locking shaft 21 is provided with three outer edge tangent planes 22 corresponding to the annular sectors 43, and the three annular sectors 43 are provided with the tensioning rollers 41 corresponding to one; the three groups of locking structures form stable power transmission between the coupler 4 and the output sleeve 2, so that the output power of the electric screwdriver is stable.

A limiting ring 23 is arranged between the locking shaft 21 and the output sleeve 2, a guide sleeve 31 is arranged at the front end of the locking sleeve 3, the output sleeve 2 is rotatably arranged in the guide sleeve 31 in a penetrating way, and the limiting ring 23 is connected to the inner end surface of the guide sleeve 31 in an abutting way; the stop collar 23 serves to establish radial stop of the output sleeve 2 within the locking sleeve 3, preventing it from falling out of the body 1.

The main body 1 comprises an outer shell cover 12, an upper inner shell 13 and a lower inner shell 14, the upper inner shell 13 and the lower inner shell 14 are butted to form a front port and an installation inner cavity of the main body 1, and an integrated structure formed by the upper inner shell 13 and the lower inner shell 14 penetrates through the outer shell cover 12; a power supply 15 and a control mechanism 16 are arranged in the mounting inner cavity, and the control mechanism 16 is electrically connected with the driving motor 11 and the power supply 15 respectively.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides a take manual-automatic electric screwdriver of auto-lock structure, includes main part (1), its characterized in that: a self-locking mechanism is arranged in the front port of the main body (1), and an output sleeve (2) which is connected with the self-locking mechanism in a matched manner is arranged on the self-locking mechanism; the main body (1) is fixedly connected with the self-locking mechanism so as to drive the output sleeve (2) to rotate integrally; be equipped with driving motor (11) in main part (1), driving motor (11) are connected and then can drive output sleeve (2) and rotate on main part (1) with the self-locking mechanism transmission.

2. The manual-automatic integrated electric screwdriver with the self-locking structure according to claim 1, characterized in that: the self-locking mechanism comprises a locking sleeve (3) and a coupler (4), the locking sleeve (3) is arranged in the front port of the main body (1) in a penetrating mode and is fixedly connected with the main body, the coupler (4) is rotatably arranged in the locking sleeve (3) in a penetrating mode, and an output shaft of the driving motor (11) is in transmission connection with the coupler (4); and locking structures are arranged among the output sleeve (2), the coupler (4) and the locking sleeve (3).

3. The manual-automatic integrated electric screwdriver with the self-locking structure according to claim 2, characterized in that: the locking structure comprises a locking shaft (21) and a tensioning roller (41), a plurality of bearing bushes (42) are arranged on the front side of the coupler (4), and the bearing bushes (42) are arranged around the coupler (4) at equal angular intervals to form an annular sector (43) between every two adjacent bearing bushes (42); the locking shaft (21) is arranged in the bearing bushes (42) in a penetrating manner, the rear end of the output sleeve (2) is fixedly connected with the locking shaft (21), and a plurality of outer edge tangent planes (22) are arranged on the locking shaft (21); the tensioning rollers (41) are arranged between the inner edge surface of the locking sleeve (3) and the corresponding outer edge tangent plane (22), and any tensioning roller (41) is rotatably arranged in the corresponding annular sector (43).

4. The manual-automatic integrated electric screwdriver with the self-locking structure according to claim 3, characterized in that: the coupler (4) is provided with three bearing bushes (42) at equal angular intervals to form three annular sectors (43), the locking shaft (21) is provided with three outer edge tangent planes (22) corresponding to the annular sectors (43), and the three annular sectors (43) are provided with tensioning rollers (41) in one-to-one correspondence.

5. The manual-automatic integrated electric screwdriver with the self-locking structure according to claim 3, characterized in that: be equipped with spacing ring (23) between locking axle (21) and output sleeve (2), the front end of lock sleeve (3) is equipped with guide sleeve (31), and output sleeve (2) rotationally wear to locate in guide sleeve (31), and spacing ring (23) are contradicted and are connected on the interior terminal surface of guide sleeve (31).

6. The manual-automatic integrated electric screwdriver with the self-locking structure according to claim 1, characterized in that: the main body (1) comprises an outer shell cover (12), an upper inner shell (13) and a lower inner shell (14), the upper inner shell (13) and the lower inner shell (14) are butted to form a front port and an installation inner cavity of the main body (1), and an integrated structure formed by the upper inner shell (13) and the lower inner shell (14) penetrates through the outer shell cover (12); and a power supply (15) and a control mechanism (16) are arranged in the mounting inner cavity, and the control mechanism (16) is electrically connected with the driving motor (11) and the power supply (15) respectively.