CN202922503U

CN202922503U - Ratchet wheel screwdriver

Info

Publication number: CN202922503U
Application number: CN 201220597394
Authority: CN
Inventors: 孙成纲; 沈佰勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-05-08
Anticipated expiration: 2022-11-13

Abstract

The utility model provides a ratchet wheel screwdriver, which comprises a ratchet wheel seat and a pallet seat, wherein the front part of the ratchet wheel seat is a cavity connected with an external screwdriver head, the outer surface of the middle part of the ratchet wheel seat is provided with the ratchet wheel, and the pallet seat is sheathed on the ratchet wheel seat. The ratchet wheel screwdriver is characterized in that the pallet seat is respectively provided with positioning notches for placing a left pallet sheet and a right pallet sheet relatively to the inner surface of the ratchet wheel, the left pallet sheet and the right pallet sheet are respectively inserted and arranged into the corresponding notches, the outer ends of the left pallet sheet and the right pallet sheet are matched with the ratchet wheel of the ratchet wheel seat, a spring which makes the pallet sheets always have the trend of being engaged with the ratchet wheel is transversely arranged between the ratchet sheets and the positioning notches, a rotatable sheath is sheathed at the front part of the ratchet seat in a combining way, and baffle sheets which are matched with the left pallet sheet and the right pallet sheet, can push the pallet sheets to be disengaged from the ratchet wheel and can realize the unidirectional rotation of the ratchet wheel seat are arranged on the inner surface of the sheath. The ratchet wheel screwdriver has the advantages that the structure is simple, the assembly and the processing are convenient, the braking effect of the screwdriver is good, the performance is reliable, and the production efficiency is greatly improved.

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

In order to address this problem, some occur and can realize the ratchet screwdriver of one direction idle running, it is 201010107101.0 Chinese patent " a kind of ratchet device of screwdriver " as the patent No., this device of 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 of pawl seat; Pawl base is provided with axial cylindrical hole, pawl seat is provided with the threaded connection hole concentric with through hole, be provided with threaded connector in through hole, 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.the patent No. is 201020222335.5 Chinese patent " a kind of ratchet screwdriver " in addition, comprise ratchet bar, the control lever of hollow and sleeve, described ratchet bar is anterior for connecting the cavity of outside driver bit, the centre is ratchet member, the rear portion is connecting portion, described control lever front portion has protuberance, the 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 the part ratchet member, described ratchet bar can rotate in described control lever and with respect to described control lever, described sleeve is placed in described protuberance and ratchet member forms unidirectional idle running and the locking that a ratchet mechanism is controlled this screwdriver outward.But these screwdriver structures are simple not and assembling and make also more complicated, are still waiting 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 the technical scheme that adopts: 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 outer surface at middle part is ratchet, described pawl base is set on pawl seat, it is characterized in that: described pawl base is respectively equipped with respect to the inner surface of ratchet can be for left, right two locating notches that ratchet is inserted, left, right two ratchet are inserted in respectively in corresponding locating notch, match with the ratchet of pawl seat in its outer end, laterally be provided with between ratchet and locating notch and make ratchet have all the time spring with the mutually meshing trend of ratchet, at the anterior involutory rotating overcoat that is equipped with of pawl base, the inner surface of overcoat is provided with the catch that the promoted ratchet that matches with left and right ratchet and ratchet break away from and realize the pawl seat one-directional rotation.

as improvement, described pawl base is provided with the manhole that axial Gong pawl seat inserts, the inwall that described locating notch is opened in respectively manhole is the position of semicircle on the lower side, and offer respectively in the position of the inwall upper semi-circle of manhole and to communicate with locating notch, can be for the arc groove of described catch insertion, described overcoat passes the anterior involutory of pawl seat and is nested with on pawl base, two catch on the overcoat inner surface insert respectively in described arc groove and a left side, the upper end of right ratchet offsets, when overcoat rotates towards a direction, driving ratchet and ratchet throws off and meshing motion, pawl seat is with respect to overcoat one-directional rotation in the opposite direction.

As improvement, the inner of described left and right ratchet is shaped to the cambered surface with dentation that matches with ratchet, offer on the inwall of described locating notch one vertically, with the caulking groove of oblique angle, be built-in with the fixedly steel disc that reduces distortion when stressed for ratchet, the lower end of described ratchet is provided with and can be nested with fixing flange for spring.

As improvement, the inboard of described locating notch is provided with groove, and described spring is placed in groove, and cross-brace is between the flange of groove inwall and ratchet.

Improve, the outside of described pawl base is provided with a blind hole again, and a steel ball protrudes that blind hole is embedded in the outside of pawl base and the inner ring of overcoat offsets, and is provided with on the inner ring of overcoat and steel ball some locating slots that are complementary.

Improve, described locating slot is three that left, center, right arrange again, and when steel ball was positioned at the interfix groove, ratchet and ratchet were just in time meshing, and pawl seat does not rotate; When the overcoat rotation, when steel ball was positioned at the locating slot on left side or right side, pawl seat was made respectively clockwise or counterclockwise one-directional rotation.

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

At last, offer a circle groove along circumference on the inner surface of described overcoat, the outer surface of described pawl base is provided with corresponding annular groove, and interior the matching with the groove of overcoat of annular groove that a jump ring is arranged in pawl base is connected and fixed overcoat and pawl seat.

Compared with prior art, the utility model has the advantage of: by the rotation of overcoat, catch and ratchet are pushed, and make ratchet and ratchet throw off and meshing motion, 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.

Description of drawings

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

Fig. 2 is front view of the present utility model;

Fig. 3 is that Fig. 2 is along the structure cutaway view of B-B line;

Fig. 4 is that Fig. 2 is along the structure cutaway view of A-A line;

Fig. 5 is STRUCTURE DECOMPOSITION schematic diagram of the present utility model.

The specific embodiment

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

as shown in the figure, a kind of ratchet screwdriver, comprise overcoat 3, pawl seat 1, pawl base 2, left, right two ratchet 4 and 5, pawl base 2 is set on pawl seat 1, the front portion of pawl seat 1 is for connecting the cavity 12 of outside driver bit, the ratchet 11 of the outer surface at the middle part of pawl seat 1 for matching with ratchet 4 and 5, pawl base 2 is provided with the manhole that axial Gong pawl seat 1 inserts, be provided with can be for left in the position of semicircle on the lower side for the inwall of manhole, right two ratchet 4 and 5 locating notches of inserting 21, ratchet 4 and 5 is inserted in locating notch 21, match with the ratchet 11 of pawl seat 1 in its outer end, ratchet 4 and the inner of 5 are shaped to the cambered surface with dentation that matches with ratchet 11, offer one vertical on the inwall of locating notch, caulking groove with oblique angle, be built-in with the fixedly steel disc 7 that reduces distortion when stressed for ratchet, be provided with groove 23 in the inboard of locating notch 21, be provided with spring 6 in groove 23, ratchet 4 and 5 lower end, middle part are provided with the flange that can be nested with for spring 6, and spring 6 cross-brace make ratchet 4 and 5 have all the time the upwards trend mutually meshing with ratchet 11 between groove 23 inwalls and flange, the cover plate of overcoat 3 is provided with the anterior corresponding circular hole 35 with pawl seat 1, that the inner surface of the cover plate of overcoat 3 is provided with is that match with ratchet 4 and 5, can promote ratchet 4 and 5 and ratchet 11 break away from and realize the catch 31 of pawl seat 1 one-directional rotation, overcoat 3 is the involutory outside that is nested with at pawl base 2 rotationally from the top of pawl seat 1, the inwall of the manhole of pawl base 2 position of semicircle on the upper side offers respectively arc groove 22 that communicate with locating notch 21, that can supply catch 31 to insert, overcoat 3 passes the anterior involutory of pawl seat 1 and is nested with on pawl base 2, the upper end that catch 31 inserts respectively in arc groove 22 with ratchet 4 offsets, when overcoat 3 rotates towards a direction, promotion by catch 31, drive ratchet 4 and throw off and meshing motion with ratchet 11, pawl seat 1 is with respect to overcoat one-directional rotation in the opposite direction,

The outside of pawl base 2 is provided with a blind hole, one steel ball 9 protrusion blind holes are embedded in the outside of pawl base 2 and the inner ring of overcoat 3 offsets, be provided with on the inner ring of overcoat 3 and steel ball 9 three of the left, center, right locating

slot

32,33 and 34 that is complementary, be provided with a support spring 10 in blind hole, support spring 10 is located between blind hole bottom and steel ball 9, makes steel ball 9 have outside all the time trend, when steel ball 9 is positioned at interfix groove 33, ratchet 4 and 5 and ratchet 11 just in time meshing, pawl seat 1 does not rotate; When overcoat 3 clockwise rotates, as Fig. 4, when steel ball 9 was positioned at the locating slot 34 on right side, the elastic force that catch 31 promotion ratchet 4 overcome spring 6 deflected, and ratchet 4 breaks away from ratchet 11, and pawl seat 1 is made counterclockwise one-directional rotation; When overcoat 3 rotates counterclockwise, when steel ball 9 was positioned at the locating slot 32 in left side, catch 31 promoted the elastic force that ratchet 5 overcome spring 6 and deflects, and ratchet 5 breaks away from ratchet 11, and pawl seat 1 is made clockwise one-directional rotation; Offer a circle groove 36 along circumference on the inner surface of overcoat 3, the outer surface of pawl base 2 is provided with corresponding annular groove, and interior the matching with the groove 36 of overcoat 3 of annular groove that a jump ring 8 is arranged in pawl base 2 is connected and fixed overcoat 3 and pawl seat 1.

Operation principle is such: when overcoat 3 rotates along a direction, make ratchet 4 and 5 with ratchet 31 carries out meshing or throw off and move by the external force of catch 31, ratchet 11 rotates in the opposite direction; When outer room did not have rotation direction, ratchet 4 and 5 was all meshing with ratchet 11, and ratchet 11 can not rotate, and remains static.

Claims

1. 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 outer surface at middle part is ratchet, described pawl base is set on pawl seat, it is characterized in that: described pawl base is respectively equipped with respect to the inner surface of ratchet can be for left, right two locating notches that ratchet is inserted, left, right two ratchet are inserted in respectively in corresponding locating notch, match with the ratchet of pawl seat in its outer end, laterally be provided with between ratchet and locating notch and make ratchet have all the time spring with the mutually meshing trend of ratchet, at the anterior involutory rotating overcoat that is equipped with of pawl base, the inner surface of overcoat is provided with the catch that the promoted ratchet that matches with left and right ratchet and ratchet break away from and realize the pawl seat one-directional rotation.

2. ratchet screwdriver according to claim 1, it is characterized in that described pawl base is provided with the manhole that axial Gong pawl seat inserts, the inwall that described locating notch is opened in respectively manhole is the position of semicircle on the lower side, and offer respectively in the position of the inwall upper semi-circle of manhole and to communicate with locating notch, can be for the arc groove of described catch insertion, described overcoat passes the anterior involutory of pawl seat and is nested with on pawl base, two catch on the overcoat inner surface insert respectively in described arc groove and a left side, the upper end of right ratchet offsets, when overcoat rotates towards a direction, driving ratchet and ratchet throws off and meshing motion, pawl seat is with respect to overcoat one-directional rotation in the opposite direction.

3. ratchet screwdriver according to claim 2, the inner that it is characterized in that described ratchet is shaped to the cambered surface with dentation that matches with ratchet, offer on the inwall of described locating notch one vertically, with the caulking groove of oblique angle, be built-in with the fixedly steel disc that reduces distortion when stressed for ratchet, the lower end of described ratchet is provided with and can be nested with fixing flange for spring.

4. ratchet screwdriver according to claim 3, is characterized in that the inboard of described locating notch is provided with groove, and described spring is placed in groove, and cross-brace is between the flange of groove inwall and ratchet.

5. the described ratchet screwdriver of arbitrary claim of according to claim 1 to 4, the outside that it is characterized in that described pawl base 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 overcoat offsets, and is provided with on the inner ring of overcoat and steel ball some locating slots that are complementary.

6. ratchet screwdriver according to claim 5, is characterized in that described locating slot is three that left, center, right arrange, and when steel ball was positioned at the interfix groove, ratchet and ratchet were just in time meshing, and pawl seat does not rotate; When the overcoat rotation, when steel ball was positioned at the locating slot on left side or right side, pawl seat was made respectively clockwise or counterclockwise one-directional rotation.

7. ratchet screwdriver according to claim 5, is characterized in that being provided with in described blind hole a support spring, and described support spring is located between blind hole bottom and steel ball, makes steel ball have outside all the time trend.

8. the described ratchet screwdriver of arbitrary claim of according to claim 1 to 4, it is characterized in that offering a circle groove along circumference on the inner surface of described overcoat, the outer surface of described pawl base is provided with corresponding annular groove, and interior the matching with the groove of overcoat of annular groove that a jump ring is arranged in pawl base is connected and fixed overcoat and pawl seat.