CN205703927U - Ratchet screwdriver - Google Patents

Abstract

This utility model provides a kind of ratchet screwdriver, including: knife bar, retainer, some latch and handle；Knife bar, retainer are coaxially disposed；Retainer is enclosed within knife bar；Retainer circumference uniform distribution locking groove, and with latch one_to_one corresponding；Latch is arranged in locking groove；Handle there is cavity；Retainer is arranged in cavity；Cavity is more than the circumscribed circle of latch to the beeline in the knife bar center of circle less than the circumscribed circle of latch, the longest distance of cavity to the knife bar center of circle.Have an advantage in that this utility model provides a kind of screwdriver, rotated the resistance difference received to different directions by latch, so that screwdriver can only unidirectional effective rotation；Being realized the switching in screwdriver different rotary direction by the elastic component on retainer and ball, process and assemble simplicity, service life is long, is suitable for special occasions and uses.

Description

Ratchet screwdriver

Technical field

This utility model relates to a kind of spanner, particularly to a kind of ratchet screwdriver.

Background technology

Screwdriver is a kind of conventional installation and extracting tool.Utilize lever principle twist bolt, screw, nut and other Screw thread tightly holds bolt or the opening of nut or the hand tools of trepanning firmware, can adjust spanner easily and use angle, be used for The degree of tightness operation of screw, has the suitability strong, feature easy to use.

Handle and guide rod that screwdriver is general are all fixing connections, it is impossible to realize the work of effective rotation as unidirectional in ratchet spanner Make mode, be not suitable for some special practical occasions.

Utility model content

A kind of ratchet screwdriver of offer of the present utility model, it is possible to achieve unidirectional effective rotation, uses special occasions to make With, to overcome the defect of above-mentioned prior art.

This utility model provides a kind of ratchet screwdriver, including: knife bar, retainer, some latch and handle；Knife bar, Retainer is coaxially disposed；Retainer is enclosed within knife bar；Retainer circumference uniform distribution locking groove, and with latch one_to_one corresponding；Stop Pin is arranged in locking groove；Handle there is cavity；Retainer is arranged in cavity；The circumference laminating knife bar of latch and chamber Body；Cavity is to the beeline in the knife bar center of circle less than the circumscribed circle of latch, and the longest distance of cavity to the knife bar center of circle is more than stopping The circumscribed circle of untie-sell.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that cavity has and stops The reflex angle that untie-sell quantity is identical, and reflex angle circumference uniform distribution.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to be only connected in having a feature in that reflex angle Dynamic utensil has on the cylindrical of locking groove.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that cavity is that rule is many Limit shape, polygonal limit number is the twice of latch quantity, and adjacent two interior angles of polygon are outer respectively to be connected on two concentric circulars.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that cavity is Flos Mume Shape.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to has a feature in that and also includes stablizing Axle, is coaxially disposed with retainer；Stablizing axle one end to be fixed on handle, the other end is rotatably connected with retainer.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to has a feature in that and also includes stablizing Axle, is coaxially disposed with knife bar；Stablizing axle one end to be fixed on handle, the other end is rotatably connected with knife bar.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that wherein, handle bag Include first handle and second handle；First handle and second handle are rotatably connected by jump ring.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that retainer has vertical Straight and the hole, location of axis；Hole, location accommodates ball and elastic component；Handle has ball grooves；Ball grooves two ends are respectively provided with location Hole；Ball can be moved between hole, two location by ball grooves, drives retainer to rotate.

Further, this utility model provides a kind of ratchet screwdriver, it is also possible to have a feature in that knife bar and cutter head can Dismounting connects.

This utility model provides a kind of ratchet screwdriver, is rotated the resistance difference received to different directions by latch, So that ratchet screwdriver can only unidirectional effective rotation；Ratchet screwdriver is realized not by the elastic component on retainer and ball With the switching of direction of rotation, processing and assemble simplicity, service life is long, is suitable for special occasions and uses.

Accompanying drawing explanation

Fig. 1 is the front view of ratchet screwdriver.

Fig. 2 is the exploded view of ratchet screwdriver.

Fig. 3 is the three-dimensional exploded view of the removal part first handle of ratchet screwdriver.

Fig. 4 is the A-A sectional view of Fig. 1.

Fig. 5 is ratchet screwdriver rotation status counterclockwise figure.

Fig. 6 is that ratchet screwdriver turns clockwise state diagram.

Fig. 7 is 5 schematic diagrams coordinated with polygon to 23 latch.

Detailed description of the invention

With specific embodiment, this utility model is further described below in conjunction with the accompanying drawings.

As shown in Figure 1, Figure 2 and Figure 3, ratchet screwdriver includes: knife bar 100, retainer 200,9 latch 300, handles 400 and stablize axle 500.

As in figure 2 it is shown, handle 400 includes: first handle 410, second handle 420 and jump ring 430.First handle 410 He Second handle 420 is rotatably attached by jump ring 430.

Knife bar 100 is through the centre bore of second handle 420.

As shown in Figure 3 and Figure 4, retainer 200 is enclosed within knife bar 100.Retainer has 9 locking grooves 210, hole, location 220 and centre bore 230.Locking groove 210 circumference uniform distribution, and with latch 300 one_to_one corresponding.Latch 300 is arranged on locking groove In 210.Hole 220, location is radial hole, is perpendicular to the axis of retainer 200, accommodates ball 50 and spring 60.Retainer 200 Tail end has centre bore 230.

Second handle 420 has cavity 421.Cavity 421 is regular 18 limit polygons, and polygonal limit number is latch number The twice of amount.Adjacent two interior angles of polygon are outer respectively to be connected on two concentric circulars.Cavity has 9 reflex angles (at Fig. 4 round dot) 422, and reflex angle circumference uniform distribution.Be connected in reflex angle retainer 200 have locking groove 210 cylindrical on.Retainer 200 is arranged on In cavity 421.

Being fixed on first handle 410 as it is shown on figure 3, stablize axle 500 one end, the other end embeds the center of retainer 200 In hole 230.Stablize axle 500 and retainer 200 is rotatably connected, play the effect that center of rotation is stable.Certainly, axle 500 is stablized It is not connected with retainer 200, directly can be rotatably connected with knife bar 100, serve the same role.

Knife bar 100,200,9 reflex angle 422 inscribed circles of retainer are for being coaxially disposed.

As shown in Figure 4, the circumference laminating knife bar 100 and cavity 421 of latch 300.Cavity 421 is to knife bar 100 center of circle Beeline is less than the circumscribed circle of latch 300, and the longest distance of cavity 421 to knife bar 100 center of circle is more than outside latch 300 Connect circle.The most each latch 300 can only move in two limits that polygon is adjacent, is limited by size and cannot move to other Position.

Certainly, cavity 421 can use the quincunx of 9 lobes, as long as the structure of 9 reflex angles 422 is constant, and its of cavity 421 He does not limits structure.

As it is shown on figure 3, have ball grooves 423 on the circumference of cavity 421；The both sides of ball grooves 423 have two location respectively Hole.Ball 50 and spring 60 are arranged in hole 220, location, and the part of ball 50, in hole, one of cavity 421 location, rotates the Two handles 420, ball 50 is moved in another hole, location by ball grooves 423, thus it is certain to drive retainer 200 to rotate Angle so that ratchet screwdriver switches between being rotated both clockwise and counterclockwise.

The head of guide rod 100 has inner hexagonal hole, can change different ratchet screwdriver heads, and range is wider.

The operation principle of ratchet screwdriver:

As it is shown in figure 5, when the handle of ratchet screwdriver rotates counterclockwise, latch receives the restriction of size, it is impossible to wear Crossing the reflex angle that polygon is inside, frictional force is big.Latch, retainer and driving end can only be along with the handle inverse times of ratchet screwdriver Pin rotates.

When the handle of ratchet screwdriver turns clockwise, latch rotates to the place that size is big, and frictional force reduces, only Relatively sliding between untie-sell, retainer and handle, knife bar does not turns clockwise with the handle of ratchet screwdriver.

In like manner, as shown in Figure 6, when the handle of ratchet screwdriver turns clockwise, latch receives the restriction of size, nothing Method passes the reflex angle that polygon is inside, and frictional force is big.Latch, retainer and driving end can only be along with the handles of ratchet screwdriver Turn clockwise.

When the handle of ratchet screwdriver rotates counterclockwise, latch rotates to the place that size is big, and frictional force reduces, only Relatively sliding between untie-sell, retainer and handle, driving end does not rotates counterclockwise with the handle of ratchet screwdriver.

Variation

Ratchet screwdriver in embodiment one, the polygonal structure using 9 latch and 18 limits combines.

As it is shown in fig. 7, ratchet screwdriver according to the size of spanner and the size of force, can set the stop of varying number Pin and polygonal combination, be not limited to the structure in embodiment one.

Claims (10)

1. a ratchet screwdriver, it is characterised in that: include, knife bar, retainer, some latch and handle；

Wherein, described knife bar, described retainer are coaxially disposed；

Described retainer is enclosed within described knife bar；Described retainer circumference uniform distribution locking groove, and with described latch one_to_one corresponding；

Described latch is arranged in described locking groove；

Described handle there is cavity；Described retainer is arranged in described cavity；

The circumference described knife bar of laminating of described latch and described cavity；

Described cavity is to the beeline in the described knife bar center of circle less than the circumscribed circle of described latch, and described cavity is to described knife bar The longest distance in the center of circle is more than the circumscribed circle of described latch.

2. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Wherein, described cavity has the reflex angle identical with described latch quantity, and reflex angle circumference uniform distribution.

3. ratchet screwdriver as claimed in claim 2, it is characterised in that:

Wherein, it is connected to described retainer in described reflex angle have on the cylindrical of described locking groove.

4. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Wherein, described cavity is regular polygon, and described polygonal limit number is the twice of described latch quantity, described polygon Adjacent two interior angles of shape are outer respectively to be connected on two concentric circulars.

5. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Wherein, described cavity is quincunx.

6. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Also include stable axle, be coaxially disposed with described retainer；Described axle one end of stablizing is fixed on handle, and the other end is with described Retainer is rotatably connected.

7. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Also include stable axle, be coaxially disposed with described knife bar；Described axle one end of stablizing is fixed on handle, the other end and described cutter Bar is rotatably connected.

8. ratchet screwdriver as claimed in claim 1, it is characterised in that:

Wherein, described handle includes first handle and second handle；Described first handle and described second handle can by jump ring It is rotatably connected.

9. ratchet screwdriver as claimed in any of claims 1 to 8 in one of claims, it is characterised in that:

Wherein, described retainer has the vertical and hole, location of axis；Hole, described location accommodates ball and elastic component；

Described handle has ball grooves；Described ball grooves two ends are respectively provided with hole, location；

Described ball can be moved between hole, two described location by described ball grooves, drives described retainer to rotate.

10. ratchet screwdriver as claimed in claim 9, it is characterised in that:

Wherein, described knife bar removably connects with cutter head.