CN111823173A

CN111823173A - Labor-saving screwdriver

Info

Publication number: CN111823173A
Application number: CN202010819089.XA
Authority: CN
Inventors: 贺雪梅; 于天毅
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-10-27

Abstract

A labor-saving screwdriver comprises a screwdriver and a handle, wherein the handle consists of a front half section of the handle and a rear half section of the handle; a gear ring is arranged on the inner wall of the shell at the front half section of the handle; a shaft is arranged at the center of the shell of the front half section of the handle; the front end of the shaft is connected with one end of the screwdriver; the rear end of the shaft is provided with a sun wheel; the sun gear is meshed with the gear ring through a planet gear; the use method is the same as that of a common screwdriver, and the screwdriver and the handle rotate in the same direction and in the same proportion; when the screwdriver needs to be used, the buckle is opened, the locking state of the front half part and the rear half part of the handle is released, the screwdriver and the handle rotate in the same direction under the work of the planetary gear, the number of the rotation turns of the screwdriver is smaller than that of the rear half part of the handle, and the screwdriver has the advantages of being simple in structure and saving labor.

Description

Labor-saving screwdriver

Technical Field

The invention relates to the technical field of hardware tools, in particular to a labor-saving screwdriver.

Background

The existing screwdriver consists of a handle and a screwdriver, and the working principle of the existing screwdriver is that the working principle of a wheel shaft is utilized. The larger the wheel, the more labor-saving, so the screwdriver with the thick handle is more labor-saving than the screwdriver with the thin handle, and has the defects of poor adaptability and labor saving only by increasing the diameter of the handle.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the labor-saving screwdriver which can save labor by changing the rotation ratio of a screwdriver and a handle, and has the characteristics of labor saving, convenience and strong adaptability.

In order to achieve the purpose, the invention adopts the technical scheme that:

a labor-saving screwdriver comprises a screwdriver and a handle, wherein the handle consists of a front half section of the handle and a rear half section of the handle; a gear ring is arranged on the inner wall of the shell at the front half section of the handle; a shaft is arranged at the center of the shell of the front half section of the handle; the front end of the shaft is connected with one end of the screwdriver; the rear end of the shaft is provided with a sun wheel; the sun gear is meshed with the gear ring through the planet gear.

The front half section of the handle and the rear half section of the handle are clamped through a buckle.

The planet wheel is arranged outside the bearing.

The planetary gears have at least 3 groups, and each group has 2 gears which are meshed.

The invention has the beneficial effects that:

the invention adopts the planetary gear transmission module, so the invention has the characteristics of labor saving, convenience and strong adaptability; the planet wheel 7 is arranged outside the bearing 9, so the transmission system has the characteristics of small friction force, high transmission efficiency and long service life; the sun gear 6 is meshed with the gear ring 8 through the planet gear 7; therefore, the screwdriver and the handle rotate in the same direction, the number of the screwdriver rotation turns is less than that of the handle rotation turns, and the screwdriver has the characteristics of labor saving and convenience.

Drawings

Fig. 1 is a schematic view of the external structure of the hair screw driver of the present invention.

Fig. 2 shows the internal structure of the screwdriver of the present invention.

In the figure: 1-screwdriver; 2-the front half section of the handle; 3-the back half section of the handle; 4-buckling; 5-axis; 6-sun gear; 7-a planet wheel; 8-a gear ring; 9-bearing.

Detailed Description

The structural and operational principles of the present invention are explained in further detail below with reference to the accompanying drawings.

Referring to fig. 1-2, a labor-saving screwdriver comprises a screwdriver 1 and a handle, and is characterized in that the handle consists of a front half-section 2 and a rear half-section 3; a gear ring 8 is arranged on the inner wall of the shell of the front half section 2 of the handle; a shaft 5 is arranged at the center of the shell of the front half section 2 of the handle; the front end of the shaft 5 is connected with one end of the screwdriver 1; the rear end of the shaft 5 is provided with a sun wheel 6; the sun gear 6 is in meshing connection with the gear ring 8 through the planet gears 7.

The handle front half section 2 and the handle rear half section 3 are clamped through a buckle 4.

The planet wheel 7 is arranged outside the bearing 9.

The planetary gears 7 have at least 3 groups, and each group has 2 gears which are meshed.

Under normal conditions, the handle is locked by the buckle, the use method is the same as that of a common screwdriver, and the screwdriver and the handle rotate in the same direction and in the same proportion.

When the screwdriver is needed, the buckle is opened, the locking state of the front half part and the rear half part of the handle is released, the screwdriver and the handle rotate in the same direction under the work of the planetary gear, and the number of the rotating circles of the screwdriver is smaller than that of the rear half part of the handle.

Referring to fig. 2, the working principle of the present invention is:

the working principle of the screwdriver is that the buckle 4 locks the front half section 2 and the rear half section 3 of the handle under normal conditions, the use method is the same as that of a common screwdriver, and the screwdriver and the handle rotate in the same direction and in the same proportion. When the screwdriver is needed, the buckle is opened, the locking state of the front half part and the rear half part of the handle is released, the screwdriver and the handle rotate in the same direction under the work of the planetary gear, and the number of the rotating turns of the screwdriver is smaller than that of the rear half part of the handle, so that the characteristic of labor saving is achieved.

Claims

1. A labor-saving screwdriver comprises a screwdriver (1) and a handle, and is characterized in that the handle consists of a front half handle section (2) and a rear half handle section (3); a gear ring (8) is arranged on the inner wall of the shell of the front half section (2) of the handle; a shaft (5) is arranged at the center of the shell of the front half section (2) of the handle; the front end of the shaft (5) is connected with one end of the screwdriver (1); the rear end of the shaft (5) is provided with a sun wheel (6); the sun gear (6) is in meshed connection with the gear ring (8) through the planet gear (7).

2. The labor-saving screwdriver as recited in claim 1, wherein the front half handle section (2) and the rear half handle section (3) are clamped by a buckle (4).

3. The labor-saving screwdriver as recited in claim 1, wherein the planet wheel (7) is arranged outside the bearing (9).

4. A power saving screwdriver according to claim 1 wherein said planetary gears (7) have at least 3 sets of 2 gears meshing with each other.