CN219170737U

CN219170737U - Screw driver

Info

Publication number: CN219170737U
Application number: CN202223109870.1U
Authority: CN
Inventors: 蔡科雷; 闵新林; 陈会甫; 乐乔威
Original assignee: Ningbo Hanpu Tools Co ltd
Current assignee: Ningbo Hanpu Tools Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-13
Anticipated expiration: 2032-11-22

Abstract

The utility model provides a screw driver, and relates to the technical field of electric tools. A screw driver, comprising: a housing; the motor is arranged in the shell; the input end of the speed reducer is connected with the output shaft of the motor; the locking mechanism is sleeved on the output shaft of the speed reducer and is connected with the shell; the driving shaft is inserted into the self-locking mechanism and sleeved on the speed reducer shaft; when the screw driver is set to be in the manual mode, the shell rotates to drive the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft to rotate. According to the utility model, the self-locking mechanism is arranged on the driving shaft and is connected with the shell, so that when the shell is rotated in a manual mode, the shell drives the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft to rotate, so that power can be transmitted from the shell to the driving shaft.

Description

Screw driver

Technical Field

The utility model belongs to the technical field of electric tools, and particularly relates to a screwdriver.

Background

A screw driver is a tool used to turn a screw to force it into place, typically having a thin wedge-shaped head that is inserted into a slot or recess in the screw head, also known as a "driver". Screw drivers are generally classified into manual screw drivers and electric screw drivers.

The electric screw driver is characterized in that an electric motor is used for replacing a hand to install and remove screws, and a conventional small electric screw driver cannot be manually used under the condition of no electricity, and an output shaft of the screw driver is in a movable non-locking state when the screw driver is manually used. Therefore, in order to facilitate the use of small electric screwdrivers when they are powered down or require manual tightening under some special conditions, it is necessary to develop a screwdriver having both an electric mode and a manual mode.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a screwdriver with an electric mode and a manual mode.

The aim of the utility model can be achieved by the following technical scheme: a screw driver, comprising:

a housing;

a motor disposed in the housing;

the input end of the speed reducer is connected with the output shaft of the motor;

the locking mechanism is sleeved on the output shaft of the speed reducer and is connected with the shell;

the driving shaft is inserted into the self-locking mechanism and sleeved on the speed reducer shaft;

when the screw driver is set to be in the electric mode, the output shaft of the speed reducer drives the driving shaft to rotate, and when the screw driver is set to be in the manual mode, the shell rotates to drive the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft to rotate.

As a further improvement of the present utility model, the self-locking mechanism includes: the self-locking device comprises a self-locking block, a retainer and a shaft sleeve, wherein the retainer is sleeved on an output shaft of the speed reducer, a groove is formed in the side wall of the retainer, the self-locking block is arranged in the groove and abuts against the side face of the driving shaft, the shaft sleeve is sleeved on the retainer and connected with the shell, and the inner wall of the shaft sleeve abuts against the self-locking block.

As a further development of the utility model, the cage is centrally provided with a through-hole, which is formed by a straight-line section and a curved section.

As a further improvement of the utility model, a plurality of grooves which are communicated with each other are formed on the side wall of the retainer, and the grooves are uniformly distributed along the circumferential direction of the retainer.

As a further improvement of the utility model, the driving shaft comprises an output section and a mounting section, the diameter of the output section is larger than that of the mounting section, a hexagon socket is arranged in the output section for mounting the screwdriver head, the mounting section is inserted into the retainer, and the self-locking block is propped against the outer wall of the mounting section.

As a further improvement of the utility model, the driving shaft further comprises a connecting section, wherein the connecting section is arranged between the output section and the mounting section, the diameter of the connecting section is larger than that of the mounting section, one surface of the self-locking block abuts against the outer wall of the mounting section, and the other surface of the self-locking block abuts against the side wall of the connecting section.

As a further improvement of the utility model, the shaft sleeve comprises a first section and a second section which are connected, the first section is sleeved on the output section, the second section is sleeved on the retainer, the inner wall of the second section is propped against the self-locking block, the second section is provided with a bulge, the shell is provided with a corresponding slot, and the bulge is clamped with the slot.

The utility model further comprises a reversing switch, wherein the reversing switch is arranged on the shell, the reversing switch comprises a reversing button and a control board, the reversing button is rotationally connected with the shell, two contacts are arranged on the control board, the reversing button is contacted with one contact when the reversing button rotates to one side, and the reversing button is contacted with the other contact when the reversing button rotates to the other side.

As a further improvement of the utility model, the housing comprises an outer housing and an inner housing which are connected with each other, the outer housing is sleeved on the inner housing, the inner housing comprises a first inner housing and a second inner housing which are detachably connected, and the motor, the speed reducer, the self-locking mechanism and the driving shaft are arranged in the inner housing.

As a further improvement of the utility model, the electric motor further comprises a battery, wherein the driving shaft, the self-locking mechanism, the speed reducer, the motor and the battery are sequentially arranged on a straight line.

Based on the technical scheme, the utility model at least has the following technical effects:

1. the self-locking mechanism is arranged on the driving shaft and is connected with the shell, so that when the shell is rotated in a manual mode, the shell drives the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft to rotate, so that power can be transmitted from the shell to the driving shaft;

2. the self-locking mechanism comprises the self-locking block, the retainer and the shaft sleeve, the self-locking mechanism is simple in structure and low in cost, and the grooves are uniformly distributed along the circumferential direction of the retainer, so that the stress of the driving shaft is uniform;

3. through arranging a through hole in the center of the retainer, the through hole is composed of a straight line section and a curve section, and is adapted to the outline of the output shaft of the speed reducer, so that the output shaft of the speed reducer can conveniently drive the retainer to rotate;

4. by arranging the connecting section and the mounting section in the driving shaft, two surfaces of the self-locking block can respectively prop against the outer wall of the mounting section and the side wall of the connecting section, so that the friction between the self-locking block and the driving shaft is improved, and the self-locking capability of the self-locking mechanism is improved;

5. the shaft sleeve is provided with the bulge, so that the shaft sleeve is clamped with the shell, the motion of the shell can be transmitted to the shaft sleeve, the inner wall of the shaft sleeve is propped against the self-locking block, and the shaft sleeve drives the self-locking block to rotate when rotating, so that the driving shaft is driven to rotate;

6. through with casing shell and inner shell, can increase the structural strength of casing, divide into first inner shell and the second inner shell of detachable connection with the inner shell, make things convenient for the installation of motor, reduction gear, self-locking mechanism etc..

Drawings

FIG. 1 is a schematic diagram of the structure of a screw driver according to the present utility model.

FIG. 2 is an exploded view of the screw driver of the present utility model.

Fig. 3 is a top view of the screw driver of the present utility model.

Fig. 4 is a cross-sectional view A-A of fig. 3.

Fig. 5 is a schematic view of a drive shaft, self-locking block and retainer in a screw driver according to the present utility model.

100, a housing; 110. an outer housing; 121. a first inner housing; 122. a second inner housing; 200. a motor; 300. a speed reducer; 410. a self-locking block; 420. a retainer; 421. a chassis; 422. an extension arm; 423. a groove; 424. a through hole; 430. a shaft sleeve; 431. a first section; 432. a second section; 433. a protrusion; 500. a drive shaft; 510. an output section; 520. a connection section; 530. a mounting section; 600. a reversing switch; 610. a reversing button; 620. a control board; 621. a contact; 700. and a battery.

Detailed Description

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly. Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The following is a specific embodiment of the present utility model, and the technical solution of the present utility model will be further described with reference to fig. 1 to 5, but the present utility model is not limited to the following embodiment.

A screw driver, comprising: the motor 200 is arranged in the shell 100, the input end of the speed reducer 300 is connected with the output shaft of the motor 200, the self-locking mechanism is sleeved on the output shaft of the speed reducer 300 and is connected with the shell 100, and the driving shaft 500 is inserted in the self-locking mechanism and is sleeved on the shaft of the speed reducer 300; the screw driver has an electric mode and a manual mode, when the screw driver is set in the electric mode, the output shaft of the speed reducer 300 drives the driving shaft 500 to rotate, and when the screw driver is set in the manual mode, the shell 100 rotates to drive the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft 500 to rotate. By providing the self-locking mechanism on the driving shaft 500 and connecting the self-locking mechanism with the housing 100, when the housing 100 is rotated in the manual mode, the housing 100 drives the self-locking mechanism to rotate, and the self-locking mechanism drives the driving shaft 500 to rotate, so that power can be transmitted from the housing 100 to the driving shaft 500.

The self-locking mechanism includes: from locking piece 410, holder 420 and axle sleeve 430, holder 420 includes chassis 421, and the chassis 421 cover is located on the output shaft of reduction gear 300, extends three extension arm 422 on the chassis 421, forms the lateral wall of holder 420, and the circumference evenly distributed of three extension arm 422 along chassis 421, in other embodiments, the quantity of extension arm 422 also can carry out the adaptation as required and adjust, is provided with recess 423 between two adjacent extension arms 422, and recess 423 is evenly arranged along the circumference of holder 420. The self-locking block 410 is disposed in the groove 423 and abuts against the side surface of the driving shaft 500, the shaft sleeve 430 is sleeved on the retainer 420 and connected with the housing 100, and the inner wall of the shaft sleeve 430 abuts against the self-locking block 410. By arranging the self-locking mechanism to include the self-locking block 410, the retainer 420 and the sleeve 430, the structure is simple, the cost is low, and the grooves 423 are arranged to be uniformly distributed along the circumferential direction of the retainer 420, so that the driving shaft 500 is uniformly stressed.

The center of the chassis 421 is provided with a through hole 424 for being connected with the output shaft of the speed reducer 300, the through hole 424 is composed of a straight line section and a curve section, in this embodiment, the through hole 424 is arranged in a cutting circle shape, and is adapted to the outline of the output shaft of the speed reducer 300, so that the output shaft of the speed reducer 300 drives the retainer 420 to rotate conveniently.

The driving shaft 500 comprises an output section 510, a connecting section 520 and a mounting section 530 which are sequentially connected, the connecting section 520 is arranged between the output section 510 and the mounting section 530, the diameter of the connecting section 520 is larger than that of the output section 510, the diameter of the output section 510 is larger than that of the mounting section 530, an inner hexagonal hole is formed in the output section 510 and used for mounting a screwdriver head, the mounting section 530 is inserted into the retainer 420, one surface of the self-locking block 410 is propped against the outer wall of the mounting section 530, and the other surface of the self-locking block 410 is propped against the side wall of the connecting section 520. By arranging the connecting section 520 and the mounting section 530 in the driving shaft 500, the self-locking block 410 can have two surfaces respectively propped against the outer wall of the mounting section 530 and the side wall of the connecting section 520, so that the friction force between the self-locking block 410 and the driving shaft 500 is improved, and the self-locking capability of the self-locking mechanism is improved.

The shaft sleeve 430 comprises a first section 431 and a second section 432 which are connected, the first section 431 is sleeved on the output section 510, the second section 432 is sleeved on the retainer 420, the inner wall of the second section 432 abuts against the self-locking block 410, protrusions 433 are arranged on the second section 432, in the embodiment, the number of the protrusions 433 is four, the protrusions 433 are uniformly distributed in the circumferential direction of the second section 432, corresponding slots are formed in the shell 100, and the protrusions 433 are connected with the slots in a clamping mode. Through set up protruding 433 on axle sleeve 430, make axle sleeve 430 and casing 100 joint, can give axle sleeve 430 with the motion of casing 100, offset from locking piece 410 through axle sleeve 430 inner wall, drive from locking piece 410 rotation when axle sleeve 430 rotates, and then drive shaft 500 rotation.

The casing 100 includes an outer casing 110 and an inner casing that are connected to each other, the outer casing 110 is cylindrical, the outer casing 110 is sleeved on the inner casing, the inner casing includes a first inner casing 121 and a second inner casing 122 that are detachably connected, the first inner casing 121 and the second inner casing 122 are symmetrically arranged, the first inner casing 121 and the second inner casing 122 are cylindrical after being connected, and the motor 200, the reducer 300, the self-locking mechanism and the driving shaft 500 are arranged in the inner casings. By separating the housing 100 from the outer housing 110 and the inner housing, the structural strength of the housing 100 can be increased, and the inner housing can be divided into the first inner housing 121 and the second inner housing 122 which are detachably connected, facilitating the installation of the motor 200, the decelerator 300, the self-locking mechanism, etc.

The screwdriver further comprises a reversing switch 600, the reversing switch 600 is arranged on the shell 100, the reversing switch 600 comprises a reversing button 610 and a control board 620, the reversing button 610 is rotationally connected with the shell 100, two contacts 621 are arranged on the control board 620, when the reversing button 610 rotates to one side, the reversing button 610 is contacted with one of the contacts 621, the motor 200 rotates to one direction, when the reversing button 610 rotates to the other side, the reversing button 610 is contacted with the other contact 621, and the motor 200 rotates to the opposite direction. By providing the reversing switch 600, the forward rotation and the reverse rotation of the motor 200 can be simply controlled.

The screwdriver further comprises a battery 700, wherein the driving shaft 500, the self-locking mechanism, the speed reducer 300, the motor 200 and the battery 700 are sequentially arranged on a straight line. The screw driver is compact in structure due to the arrangement.

The working process of the screw driver comprises the following steps: in the electric mode, the reverse rotation of the motor 200 is regulated by the reversing switch 600 to control the screwing or unscrewing, the output shaft of the motor 200 drives the speed reducer 300 to operate, the output shaft of the speed reducer 300 drives the retainer 420 to rotate, the retainer 420 drives the self-locking block 410 to rotate, and the self-locking block 410 drives the driving shaft 500 to rotate; in the manual mode, the user rotates the housing 100, the housing 100 drives the shaft sleeve 430 to rotate, the shaft sleeve 430 drives the self-locking block 410 to rotate, and the self-locking block 410 drives the driving shaft 500 to rotate.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. A screw driver, comprising:

a housing;

a motor disposed in the housing;

the self-locking mechanism is sleeved on the output shaft of the speed reducer and is connected with the shell;

2. A screw driver according to claim 1, wherein said self-locking mechanism comprises: the self-locking device comprises a self-locking block, a retainer and a shaft sleeve, wherein the retainer is sleeved on an output shaft of the speed reducer, a groove is formed in the side wall of the retainer, the self-locking block is arranged in the groove and abuts against the side face of the driving shaft, the shaft sleeve is sleeved on the retainer and connected with the shell, and the inner wall of the shaft sleeve abuts against the self-locking block.

3. A screw driver according to claim 2, wherein the cage is centrally provided with a through hole, said through hole being formed by a straight section and a curved section.

4. A screw driver according to claim 2, wherein a plurality of mutually communicating grooves are formed in the side wall of the holder, and the grooves are uniformly distributed along the circumferential direction of the holder.

5. A screw driver according to claim 2, wherein the drive shaft comprises an output section and a mounting section, the diameter of the output section is larger than that of the mounting section, an internal hexagonal hole is arranged in the output section for mounting the driver head, the mounting section is inserted into the retainer, and the self-locking block abuts against the outer wall of the mounting section.

6. The screw driver of claim 5, wherein the drive shaft further comprises a connecting section disposed between the output section and the mounting section, the connecting section having a diameter greater than the mounting section diameter, one face of the self-locking block abutting against an outer wall of the mounting section, and the other face of the self-locking block abutting against a side wall of the connecting section.

7. The screw driver according to claim 5, wherein the shaft sleeve comprises a first section and a second section which are connected, the first section is sleeved on the output section, the second section is sleeved on the retainer, the inner wall of the second section is abutted against the self-locking block, a protrusion is arranged on the second section, a corresponding slot is arranged on the shell, and the protrusion is clamped with the slot.

8. The screw driver according to claim 1, further comprising a reversing switch disposed on the housing, the reversing switch comprising a reversing button and a control board, the reversing button being rotatably connected to the housing, the control board being provided with two contacts, the reversing button being in contact with one of the contacts when the reversing button is rotated to one side, the reversing button being in contact with the other contact when the reversing button is rotated to the other side.

9. The screw driver according to claim 1, wherein the housing comprises an outer housing and an inner housing which are connected to each other, the outer housing is sleeved on the inner housing, the inner housing comprises a first inner housing and a second inner housing which are detachably connected, and the motor, the speed reducer, the self-locking mechanism and the driving shaft are arranged in the inner housing.

10. The screw driver of claim 1 further comprising a battery, wherein the drive shaft, the self-locking mechanism, the speed reducer, the motor, and the battery are arranged in a line.