CN203510045U

CN203510045U - Ratchet wheel screwdriver

Info

Publication number: CN203510045U
Application number: CN201320576125.XU
Authority: CN
Inventors: 李永光
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-17
Filing date: 2013-09-17
Publication date: 2014-04-02
Anticipated expiration: 2023-09-17

Abstract

A ratchet wheel screwdriver comprises a ratchet wheel base and a pawl base. The ratchet wheel screwdriver is characterized in that the number of pawl pieces is four, and the four pawl pieces are distributed up, down, left and right; positioning notches which can allow the pawl pieces to be embedded are formed in the positions, opposite to the outer surfaces of ratchets, of the pawl base respectively; each pawl piece is inserted into the corresponding positioning notch, the outer end face of each pawl piece is formed to be of a tooth-shaped structure meshed with the ratchets, and a spring which enables the pawl pieces to have the trend that the pawl pieces are meshed with the ratchets all the time is transversely arranged between the pawl pieces and one positioning notch; a rotatable clamping ring is arranged on the front portion of the pawl base in a sleeved mode, and a pushing part which is matched with the pawl pieces, can push the pawl pieces to be disengaged from the ratchets and can achieve one-way rotation of the ratchet wheel base is arranged on the internal surface of an outer sleeve. The ratchet wheel screwdriver is simple in structure, convenient to assemble and machine, good in brake effect, reliable in performance, and capable of greatly improving production efficiency.

Description

A kind of ratchet screwdriver

Technical field

The utility model relates to a kind of screwdriver, specifically a kind of ratchet screwdriver.

Background technology

Screwdriver is as a kind of conventional handware, and for slack adjuster, existing screwdriver generally includes handle, knife bar and cutter head, and user drives knife bar and cutter head to rotate by turning handle, thereby cutter head drives screw turns to carry out the degree of tightness of screw.But such screwdriver rotates by manpower completely, use relatively effort and direction also wayward, in rotation process, may cause convolution to make to use more inconvenient.

In order to address this problem, occurred that some can realize the ratchet screwdriver of one direction idle running, as the patent No. Chinese patent < < ratchet screwdriver > > that is 201020222335.5, comprise ratchet bar, the control lever of hollow and sleeve, described ratchet bar is anterior for connecting the cavity of outside driver bit, centre is ratchet member, rear portion is connecting portion, described control lever front portion has protuberance, rear portion is connecting rod, the connecting portion of described ratchet bar and ratchet member are inserted in control lever and are laid respectively in described protuberance and connecting rod, described protuberance is around part ratchet member, described ratchet bar can rotate in described control lever and with respect to described control lever, described sleeve is placed on described protuberance and ratchet member forms unidirectional idle running and the locking that a ratchet mechanism is controlled this screwdriver outward.The simple not and assembling of the structure of this screwdriver and make also more complicated.

The ratchet device and ratchet screwdriver and the Ratchet Screwdriver Handle > > that also have the Chinese patent < < screwdriver that the patent No. is CN201020110055.5, this ratchet device comprises pawl seat and pawl base, pawl seat is set on pawl base, and the ratchet on pawl base is meshed with the ratchet slot of pawl seat; Pawl base is provided with axial cylindrical hole, pawl seat is provided with the threaded connection hole concentric with through hole, in through hole, be provided with threaded connector, one end and the threaded connection hole of threaded connector are threaded connection, the other end of threaded connector passes through hole and coordinates with via clearance, and threaded connector is provided with defining flange on the end of through hole.This screwdriver is provided with two ratchets, although relatively simple for structure, the contact-making surface of ratchet and ratchet slot is too small, and easy generation wearing and tearing cause to rotate controls the phenomenon generations such as malfunctioning, so structurally also needs further improvement.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of simple in structure, easy to assembly for the above-mentioned state of the art, and the ratchet screwdriver of good braking effect, dependable performance.

The utility model solves the problems of the technologies described above adopted technical scheme: a kind of ratchet screwdriver, comprise pawl seat and pawl base, the front portion of described pawl seat is for connecting the cavity of outside driver bit, the inner surface at rear portion is ratchet, described pawl seat is set on pawl base, ratchet on pawl base is meshed with the ratchet on pawl seat, the rear end of pawl base is provided with the connecting portion for connecting screw cutter handle of a knife, it is characterized in that: described ratchet is to present bottom left to part four of cloth on the right side, pawl base is respectively equipped with respect to the outer surface of ratchet the locating notch that can insert for ratchet, ratchet is inserted in respectively in corresponding locating notch, its outer face is shaped to the dentalation being meshed with ratchet, between ratchet and locating notch, be laterally provided with the spring that makes ratchet there is all the time the trend mutually meshing with ratchet, in the front portion of pawl base, be equipped with a rotating collar, the inner surface of overcoat is provided with the pushing part that the promoted ratchet that matches with ratchet and ratchet depart from and realize pawl seat one-directional rotation.

As improvement, described locating notch is even circumferential and is disposed on pawl base, the pushing part of described collar is four, at the outer surface of pawl base, corresponding to the position of locating notch, be provided with the recess of inserting for pushing part, described collar is nested with on pawl base through the rear portion of pawl seat, pushing part on collar inner surface is inserted respectively in corresponding recess and is matched with the outer end of ratchet, when collar rotates towards a direction, drive ratchet and ratchet to throw off and meshing motion, pawl seat is with respect to collar one-directional rotation in the opposite direction.

As improvement, the bottom of described locating notch is arc groove, and the inner end of described ratchet is corresponding arc surface, and the inner end of ratchet is arranged in arc groove rotationally.

As improvement, the inner side of described locating notch is provided with the groove of setting for spring, and described spring is two pairs of torsion springs, is placed in respectively in groove, and cross-brace is between groove inwall and ratchet.

Improve again, on the inner surface of described collar, along circumference, offer a locating slot, the outer surface of described pawl base, the place ahead of locating notch are provided with the locating slot of a ring shape, and a centring ring is arranged in the locating slot of pawl base and matches collar and pawl base are connected and fixed with the locating slot of collar.

Improve again, the outside, middle part of described pawl base is provided with the bulge loop matching with collar, the sidepiece of bulge loop is provided with a blind hole, and a steel ball protrudes that blind hole is embedded in the outside of pawl base and the inner ring of collar offsets, and is provided with and steel ball some locating holes that match on the inner ring of collar.

Further improve, described locating hole is three that left, center, right arrange, and when steel ball is positioned at interfix hole, ratchet and ratchet are just in time meshing, and pawl seat does not rotate; When overcoat rotates, when steel ball is positioned at the locating hole on left side or right side, pawl seat is made respectively clockwise or counterclockwise one-directional rotation.

Further improve, be provided with a stage clip in described blind hole, described stage clip is located between blind hole bottom and steel ball, makes steel ball have outside all the time trend.

Compared with prior art, the utility model has the advantage of: ratchet is set to 4, the outer end of ratchet is the flank of tooth coordinating with ratchet, and the contact-making surface of ratchet and ratchet is just larger like this, controls like this rotation just more stable; On the inner ring of collar, pushing part is set, by the rotation of collar, pushing part and ratchet are pushed, and the ratchet of ratchet and default tooth pitch is thrown off and the motion embedding, and realize the clockwise of ratchet or rotate counterclockwise.The utility model is simple in structure, assembling with process all easily, screwdriver good braking effect dependable performance, has improved production efficiency greatly.

Accompanying drawing explanation

Fig. 1 is perspective view of the present utility model;

Fig. 2 is that Fig. 1 is along the structure cutaway view of A-A line;

Fig. 3 is STRUCTURE DECOMPOSITION schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.

As Fig. 1, 2, shown in 3, the ratchet screwdriver of the present embodiment, comprises pawl seat 1, collar 2, pawl base 3, left, lower four the ratchet 4a in upper right, 4b, 4c and 4d, the front portion of pawl seat 1 is for connecting the cavity of outside driver bit, and the inner surface at rear portion is the ratchet 11 of default tooth pitch, and pawl seat 1 is set on pawl base 3, the ratchet 4a on

pawl base

3, 4b, 4c and 4d are meshed with the ratchet 11 on pawl seat 1, and the rear end of pawl base 3 is provided with the connecting portion for connecting screw cutter handle of a knife, and pawl base 3 is respectively equipped with and can supplies ratchet 4a with respect to the outer surface of ratchet 11, 4b, four locating notches 31 that 4c and 4d insert, locating notch 31 is longitudinal even circumferential and is disposed on pawl base 3, and the bottom of locating notch 31 is arc groove,

ratchet

4a, 4b, the inner end of 4c and 4d is corresponding arc surface 42,

ratchet

4a, 4b, 4c and 4d are inserted in respectively in corresponding locating notch 31, and its inner end is arranged in arc groove rotationally, and its outer face is shaped to the dentalation 41 being meshed with ratchet 11, at

ratchet

4a, 4b, between 4c and 4d and locating notch 31, be laterally provided with and make

ratchet

4a, 4b, 4c and 4d have all the time the spring 5 of the trend mutually meshing with ratchet 11, spring 5 is two pairs of torsion springs, and the inner side of locating notch 31 is provided with the groove of setting for spring 5, collar 2 is rotationally through being nested with the front portion at pawl base 3, the inner surface of collar 2 is provided with and

ratchet

4a, 4b, the promoted ratchet 4a that 4c and 4d match, 4b, 4c and 4d and ratchet 11 depart from, and the pushing part 21 of realizing pawl seat 1 one-directional rotation, pushing part 21 is four and coordinates with each ratchet, at the outer surface of pawl base 3, corresponding to the position of locating notch 31, be provided with the recess of inserting for pushing part 21, collar 2 is nested with on pawl base 3 through the rear portion of pawl seat 1, pushing part 21 on collar 2 inner surfaces is inserted respectively in corresponding recess and is matched with the outer end of ratchet, when collar 2 rotates towards a direction, drive

ratchet

4a, 4b, 4c and 4d and ratchet 11 are thrown off and meshing motion, pawl seat 1 is with respect to collar 2 one-directional rotation in the opposite direction, on the inner surface of collar 2, along circumference, offer a locating slot, locating slot 32, one centring rings 6 that the place ahead of the outer surface of pawl base 3, locating notch 31 is provided with a ring shape are arranged in the locating slot 32 of pawl base 3 and match with the locating slot of collar 2 collar 2 and pawl base 3 are connected and fixed.

The outside of pawl base 3 is provided with a blind hole, one steel ball 7 protrusion blind holes are embedded in the outside of pawl base 3 and the inner ring of collar 2 offsets, on the inner ring of collar 2, be provided with and steel ball 7 three of the left, center, right locating hole 22 that matches, in blind hole, be provided with a stage clip 8, stage clip 8 is located between blind hole bottom and steel ball 7, makes steel ball 7 have outside all the time trend, as shown in Figure 2, when the locating hole 22 of steel ball 7 in the middle of being positioned at, four

ratchet

4a, 4b, 4c and 4d and ratchet 11 are just in time meshing, and pawl seat 1 does not rotate; When collar 2 clockwise rotates under external force, when steel ball 7 is positioned at the locating hole 22 on right side, the elastic force that pushing part 21

promotion ratchet

4b, 4c overcome spring 5 deflects,

ratchet

4b, 4c and ratchet slot 11 depart from, and

ratchet

4a, 4d embed in ratchet 11, pawl seat 1 is made counterclockwise one-directional rotation; When collar 2 rotates counterclockwise, when steel ball 7 is positioned at the locating hole 22 in left side, the elastic force that pushing part 21

promotion ratchet

4a, 4d overcome spring 5 deflects, and

ratchet

4a, 4d and ratchet 11 depart from, and pawl seat 1 is made clockwise one-directional rotation.

Operation principle is such: when collar 2 rotates along a direction, by the external force of pushing part 21, make

ratchet

4a, 4b, 4c and 4d and ratchet 111 carry out meshing or throw off and move, pawl seat 1 rotates in the opposite direction; When outer room does not have rotation direction,

ratchet

4a, 4b, 4c and 4d are meshing with ratchet 11, and pawl seat 1 can not rotate, and remains static.

Claims

1. a ratchet screwdriver, comprise pawl seat and pawl base, the front portion of described pawl seat is for connecting the cavity of outside driver bit, the inner surface at rear portion is ratchet, described pawl seat is set on pawl base, ratchet on pawl base is meshed with the ratchet on pawl seat, the rear end of pawl base is provided with the connecting portion for connecting screw cutter handle of a knife, it is characterized in that: described ratchet is to present bottom left to part four of cloth on the right side, pawl base is respectively equipped with respect to the outer surface of ratchet the locating notch that can insert for ratchet, ratchet is inserted in respectively in corresponding locating notch, its outer face is shaped to the dentalation being meshed with ratchet, between ratchet and locating notch, be laterally provided with the spring that makes ratchet there is all the time the trend mutually meshing with ratchet, in the front portion of pawl base, be equipped with a rotating collar, the inner surface of overcoat is provided with the pushing part that the promoted ratchet that matches with ratchet and ratchet depart from and realize pawl seat one-directional rotation.

2. ratchet screwdriver according to claim 1, it is characterized in that: described locating notch is even circumferential and is disposed on pawl base, the pushing part of described collar is four, at the outer surface of pawl base, corresponding to the position of locating notch, be provided with the recess of inserting for pushing part, described collar is nested with on pawl base through the rear portion of pawl seat, pushing part on collar inner surface is inserted respectively in corresponding recess and is matched with the outer end of ratchet, when collar rotates towards a direction, drive ratchet and ratchet to throw off and meshing motion, pawl seat is with respect to collar one-directional rotation in the opposite direction.

3. ratchet screwdriver according to claim 2, is characterized in that: the bottom of described locating notch is arc groove, and the inner end of described ratchet is corresponding arc surface, and the inner end of ratchet is arranged in arc groove rotationally.

4. ratchet screwdriver according to claim 3, is characterized in that: the inner side of described locating notch is provided with the groove of setting for spring, and described spring is two pairs of torsion springs, is placed in respectively in groove, and cross-brace is between groove inwall and ratchet.

5. according to the ratchet screwdriver described in the arbitrary claim of claim 1 to 4, it is characterized in that: on the inner surface of described collar, along circumference, offer a locating slot, the outer surface of described pawl base, the place ahead of locating notch are provided with the locating slot of a ring shape, and a centring ring is arranged in the locating slot of pawl base and matches collar and pawl base are connected and fixed with the locating slot of collar.

6. according to the ratchet screwdriver described in the arbitrary claim of claim 1 to 4, it is characterized in that: the outside, middle part of described pawl base is provided with the bulge loop matching with collar, the sidepiece of bulge loop is provided with a blind hole, one steel ball protrudes that blind hole is embedded in the outside of pawl base and the inner ring of collar offsets, and is provided with and steel ball some locating holes that match on the inner ring of collar.

7. ratchet screwdriver according to claim 6, is characterized in that: described locating hole is three that left, center, right arrange, and when steel ball is positioned at interfix hole, ratchet and ratchet are just in time meshing, and pawl seat does not rotate; When overcoat rotates, when steel ball is positioned at the locating hole on left side or right side, pawl seat is made respectively clockwise or counterclockwise one-directional rotation.

8. ratchet screwdriver according to claim 6, is characterized in that: in described blind hole, be provided with a stage clip, described stage clip is located between blind hole bottom and steel ball, makes steel ball have outside all the time trend.