CN210650435U

CN210650435U - Screwdriver with ratchet structure

Info

Publication number: CN210650435U
Application number: CN201921312420.8U
Authority: CN
Inventors: 李理
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-06-02
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a screwdriver with ratchet structure, include: the handle, the conversion device and the cutter head; a handle is arranged at the rear end of the conversion device; and a cutter head is arranged at the front end of the conversion device. The screwdriver has the advantages of simple structure, reasonable design, convenience in use and multiple functions, and greatly improves the use efficiency of the screwdriver; meanwhile, when the screwdriver is used, the screw can be screwed up and unscrewed forwardly and reversely by shifting the rolling needles, and the screwdriver can work continuously without exchanging the hand angle.

Description

Screwdriver with ratchet structure

Technical Field

The utility model belongs to the technical field of the screwdriver technique and specifically relates to a screwdriver with ratchet structure is related to.

Background

The screwdriver is used as a common hardware for tightening and loosening screws, the common screwdriver usually comprises a handle 1, a screwdriver rod 2 and a screwdriver head 3 as shown in Chinese patent CN2071113, a user drives the screwdriver rod 2 and the screwdriver head 3 to rotate by rotating the handle 1, and the screwdriver head 3 drives the screws to rotate to tighten and loosen the screws. However, the screwdriver is completely rotated by manpower, so that the screwdriver is laboursome to use and difficult to control the direction, and the screwdriver can be rotated to cause the phenomenon of more inconvenience in use. Therefore, a ratchet screwdriver capable of realizing idle rotation is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screwdriver with ratchet structure.

To achieve the above object, the present invention adopts the following:

a screwdriver with a ratchet structure, comprising: the handle, the conversion device and the cutter head; a handle is arranged at the rear end of the conversion device; and a cutter head is arranged at the front end of the conversion device.

Preferably, the conversion device comprises a stator mandrel, a positioning spring, a positioning steel ball, a gear shifting block, a rolling needle and a rotor mandrel; a spring hole is formed in one side of the bottom end of the stator core shaft; a positioning spring is arranged in the spring hole; a positioning steel ball is arranged at the bottom end of the positioning spring; a gear shifting block is arranged at the bottom end of the stator mandrel; a steel ball limiting groove is formed in the upper surface of the gear shifting block; the bottom end of the positioning steel ball is limited in the steel ball limiting groove; the roller pins are arranged in the rotor mandrel; the bottom end of the gear shifting block is arranged in a rotor mandrel between the rolling needles.

Preferably, the bottom end of the gear shifting block is provided with a shifting leg; the number of the shifting legs is three, and the shifting legs are uniformly arranged at the bottom end of the gear shifting block; the number of the needle rollers is six, the needle rollers are divided into three groups, each group comprises two needle rollers, and the needle rollers are uniformly arranged in the rotor mandrel; the three poking legs are respectively arranged in the middle of the three groups of rolling needles.

Preferably, the device further comprises a connecting screw; and the connecting screws respectively penetrate through the centers of the stator core shaft, the gear shifting block and the rotor core shaft and fix the positions of the rotor core shaft and the stator core shaft. The utility model has the advantages of it is following:

the screwdriver has the advantages of simple structure, reasonable design, convenience in use and multiple functions, and greatly improves the use efficiency of the screwdriver; meanwhile, when the screwdriver is used, the screw can be screwed up and unscrewed forwardly and reversely by shifting the rolling needles, and the screwdriver can work continuously without exchanging the hand angle.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a screwdriver with a ratchet structure according to the present invention.

Fig. 2 is a perspective exploded view of the conversion device.

Fig. 3 is an exploded view of the switch over device.

Fig. 4 is a schematic view of the shift block located between two needles.

Fig. 5 is a schematic view of the shift block approaching the needle roller 1.

Fig. 6 is a schematic view of the shift block approaching the needle roller 2.

In the figures, the various reference numbers are:

1-handle, 2-conversion device, 21-stator mandrel, 22-positioning spring, 23-positioning steel ball, 24-gear shifting block, 25-rolling needle, 26-rotor mandrel, 27-spring hole, 28-shifting pin, 29-steel ball limiting groove, 3-tool bit and 4-connecting screw.

Detailed Description

In order to illustrate the invention more clearly, the invention is further described below with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

As shown in fig. 1 to 6, a screwdriver having a ratchet structure includes: the handle 1, the conversion device 2 and the cutter head 3; a handle 1 is arranged at the rear end of the conversion device 2; a cutter head 3 is arranged at the front end of the conversion device 2. When in use, the handle 1 is held and the bit 3 is screwed to tighten or loosen the screw.

Further, the conversion device 2 comprises a stator mandrel 21, a positioning spring 22, a positioning steel ball 23, a shifting block 24, a needle roller 25 and a rotor mandrel 26; a spring hole 27 is formed in one side of the bottom end of the stator core shaft 21; a positioning spring 22 is arranged in the spring hole 27; a positioning steel ball 23 is arranged at the bottom end of the positioning spring 22; a gear shifting block 24 is arranged at the bottom end of the stator core shaft 21; a steel ball limiting groove 29 is formed in the upper surface of the gear shifting block 24; the bottom end of the positioning steel ball 23 is limited in the steel ball limiting groove 29; the needle roller 25 is arranged in the rotor mandrel 26; the bottom end of the shift block 24 is disposed in a rotor spindle 26 between the needles 25.

Further, a shifting leg 28 is arranged at the bottom end of the gear shifting block 24; three shifting legs 28 are uniformly arranged at the bottom end of the gear shifting block 4; the six rolling needles 25 are divided into three groups, two in each group, and are uniformly arranged in the rotor mandrel 26; the three poking legs 28 are respectively arranged in the middle of the three groups of needle rollers 25. By shifting the shift block 24 to move the shift leg 28, the shift leg 28 is close to the different needles 25, and the resulting functions are different.

Further, the device also comprises a connecting screw 4; the connecting screws 4 respectively penetrate through the centers of the stator core shaft 21, the shifting block 24 and the rotor core shaft 26, and fix the positions of the rotor core shaft 26 and the stator core shaft 21. The conversion device 2 is convenient to fix and becomes a moving body by arranging the connecting screw 4.

Further, the rotor mandrel 26 is movably connected with the cutter head 3. Be convenient for when using, change different tool bits 3 according to the screw of screw head or the size of screw head for different screws can be dismantled to this device, have increased the function of this device.

Furthermore, there are three steel ball limiting grooves 29, which are uniformly arranged on the shifting block 24 and are used in cooperation with the positioning steel balls 23. When the positioning steel balls 23 roll into different steel ball limiting grooves 29, the function of the screwdriver of the device is changed.

The working principle of the device is as follows: the gear shifting block 24 in the device has three gears and is completed by three steel ball limiting grooves 29, wherein the positioning spring 22 and the positioning steel balls 23 act on the gear shifting block 24; the rotor spindle 26 can be controlled to be fixed in a first direction, a second direction, and left and right directions, respectively.

As shown in fig. 4, the left and right are fixed, and when the leg 28 is adjusted to the middle position, the rotor spindle 26 rotates to the first direction, the second needle roller is driven, and the stator spindle 21 is cam-shaped, so that the rotor spindle 26 cannot rotate, and the force can be transmitted. When the rotor spindle 26 rotates towards the second direction, the first rolling needle is driven, and the rotor spindle 26 cannot rotate due to the cam shape of the stator spindle 21, so that force can be transmitted out.

As shown in fig. 5, the shift block 24 rotates clockwise to press the first roller, so that the rotation of the rotor core shaft 26 in the second direction will drive the second roller to rotate beyond the rotor core shaft 26 because the stator core shaft 21 is cam-shaped, so that the force can be transmitted, when the rotor core shaft 26 rotates in the first direction, the first roller is blocked by the shift block 24 and cannot be taken out, and the second roller just lets away at the maximum position of the stator core shaft 21, so that the rotor core shaft 26 can rotate in no-load.

As shown in fig. 6, the shift block 24 rotates counterclockwise to press the second needle roller, so that the first needle roller is driven by the rotation of the rotor spindle 26 in the first direction, the rotor spindle 26 cannot rotate due to the cam shape of the stator spindle 21, and thus the force can be transmitted, and the second needle roller is blocked by the shift block 24 and cannot be taken out when the rotor spindle 26 rotates in the second direction, and the second needle roller just lets away from the maximum position of the stator spindle 21, so that the rotor spindle 26 can rotate in an idle load.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.

Claims

1. A screwdriver with a ratchet structure, comprising: the handle, the conversion device and the cutter head; a handle is arranged at the rear end of the conversion device; and a cutter head is arranged at the front end of the conversion device.

2. The screwdriver with the ratchet structure as claimed in claim 1, wherein the switching device comprises a stator mandrel, a positioning spring, a positioning steel ball, a shifting block, a needle roller and a rotor mandrel; a spring hole is formed in one side of the bottom end of the stator core shaft; a positioning spring is arranged in the spring hole; a positioning steel ball is arranged at the bottom end of the positioning spring; a gear shifting block is arranged at the bottom end of the stator mandrel; a steel ball limiting groove is formed in the upper surface of the gear shifting block; the bottom end of the positioning steel ball is limited in the steel ball limiting groove; the roller pins are arranged in the rotor mandrel; the bottom end of the gear shifting block is arranged in a rotor mandrel between the rolling needles.

3. The screwdriver with the ratchet structure as claimed in claim 2, wherein a shifting leg is arranged at the bottom end of the shifting block; the number of the shifting legs is three, and the shifting legs are uniformly arranged at the bottom end of the gear shifting block; the number of the needle rollers is six, the needle rollers are divided into three groups, each group comprises two needle rollers, and the needle rollers are uniformly arranged in the rotor mandrel; the three poking legs are respectively arranged in the middle of the three groups of rolling needles.

4. The screwdriver with the ratchet structure as claimed in claim 3, further comprising a connecting screw; and the connecting screws respectively penetrate through the centers of the stator core shaft, the gear shifting block and the rotor core shaft and fix the positions of the rotor core shaft and the stator core shaft.

5. The screwdriver as recited in claim 4, wherein the rotor spindle is movably connected to the screwdriver bit.

6. The screwdriver as claimed in claim 2, wherein the steel ball limiting grooves are three and are uniformly arranged on the gear shifting blocks and are matched with the positioning steel balls for use.