CN2340564Y

CN2340564Y - Double speed enhanced spanner

Info

Publication number: CN2340564Y
Application number: CN 98206401
Authority: CN
Inventors: 吕存智
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-02
Filing date: 1998-07-02
Publication date: 1999-09-29
Anticipated expiration: 2008-07-02

Abstract

The utility model relates to a spanner which is especially suitable for being used in occasions with large torque, such as screwing large screw pieces, hand tapping, threading, etc. The utility model is characterized in that an end head of a handle is provided with a cylindrical dummy club on which an eccentric hole is arranged, an eccentric claw which is composed of a ferrule and the claw thereof is sheathed on the outer edge of the cylindrical dummy club, wherein, the claw of the ferrule is extended outwards. The eccentric claw is meshed with a toothed wheel of a rotating shaft, the eccentric hole of the handle is movably matched with a pin shaft which is arranged in the outwards protruded opening of an outer sleeve, and a return spring is arranged in the handle, wherein, both ends of the return spring are respectively abutted on the right wall of the outwards protruded opening and the body of the handle; a pressure spring is arranged in the outwards protruded opening, wherein, both ends of the pressure spring are respectively abutted on the left wall of the outwards protruded opening and the back of the eccentric claw. Accordingly, the utility model has the advantages of convenient use, labour saving and high efficiency.

Description

Double speed reinforcement spanner

The utility model relates to a kind of spanner, is particularly suited for screwing high pulling torque occasions such as major thread spare and hand tapping, hitch and uses.

At present, common spanner, when screwing big screw, often spanner on add sleeve pipe, the method with increasing the arm of force makes screw-driving, operation is trouble, and can't adopt at narrow space and high-altitude; And the reinforcement spanner that has adopted now is to realize with the planetary gear speed-reduction transmission, and not only mechanism's complexity, volume are big, the cost height, and can only screw inefficiency at a slow speed.

In view of this, the purpose of this utility model provides a kind of double speed reinforcement spanner, can satisfy and screw screw fast, again can be last fastening or realize reinforcement when beginning to unclamp at screw.

The purpose of this utility model is achieved in that it comprises overcoat, rotating shaft, handle and screw sleeve, wherein, shaft support is in overcoat, the centre of this rotating shaft has toothed wheel and exposes two ends is that many power joint and screw sleeve are engaged in one in many ways on the joint, it is characterized in that: sheathed one overhanging fixed head on the outer rim of overcoat, put outward and also offer an evagination opening, in this evagination opening, wear a bearing pin, one termination of handle has a cylinder boss, this cylinder boss is provided with an eccentric orfice, and the end at this eccentric orfice is provided with a groove again; In sheathed eccentric hock and hock and the toothed wheel engagement that constitutes by a lasso and overhanging hock thereof of cylinder boss outer rim, the eccentric orfice of handle cooperates with bearing pin is movable again, in the groove of handle, be provided with two ends respectively against the return spring of right wall of evagination opening and handle itself, in the evagination opening, be provided with two ends respectively against the holddown spring at the hock back side of left wall of evagination opening and eccentric hock.

Described toothed wheel is gear or ratchet, and corresponding described eccentric hock is tooth bar or ratchet.

Owing to adopt such scheme: easy to use, laborsaving, cost reduces, and service efficiency also improves.

Below in conjunction with drawings and Examples the utility model is advanced an explanation.

Fig. 1 the utility model exemplary embodiments structural representation.

The A-A cross-sectional schematic of Fig. 2 the utility model exemplary embodiments Fig. 1.

Fig. 3 the utility model exemplary embodiments handle schematic diagram.

Fig. 4 the utility model exemplary embodiments handle elevational schematic view.

The eccentric hock schematic diagram of Fig. 5 the utility model exemplary embodiments.

Among the figure: 1, overcoat, 11, polygonal body, 12, cylinder, 13, the evagination opening, 131, overhanging arm, 14, axle sleeve, 15, bearing.

2, rotating shaft, 21, toothed wheel, 22, joint in many ways.

3, handle, 31, cylinder boss, 32, eccentric orfice, 33, groove.

4, eccentric hock, 41, hock, 42, lasso.

5, bearing pin.

6, overhanging fixed head, 61, polygonal hole.

7, screw sleeve.

8, return spring.

9, holddown spring.

Present embodiment comprises overcoat 1, rotating shaft 2, handle 3, eccentric hock 4, bearing pin 5, overhanging fixed head 6, screw sleeve 7, return spring 8 and holddown spring 9, shown in Fig. 1～5, wherein:

Overcoat 1 is that the two ends outer rim is polygonal body 11 (also can be multiple tooth shape), and the centre is a cylinder 12, and in the middle of cylinder 12, offer an evagination opening 13, be provided with two bearings 15 and two ends axle sleeve 14 (as shown in Figure 1, 2) in addition in the overcoat 1 with overhanging arm 131.

The centre of rotating shaft 2 is provided with a toothed wheel 21 (also can be ratchet), and two ends is joint 22 in many ways, this rotating shaft 2 is bearing in the bearing 15 in the overcoat 1, but two ends in many ways joint 22 be exposed at overcoat 1 outside and an end in many ways joint 22 covers join screw sleeve 7, and toothed wheel 21 is aimed at the evagination opening 13 (as shown in Figure 1, 2) of overcoats 1.

One termination of handle 3 has a cylinder boss 31, and this cylinder boss 31 is provided with an eccentric orfice 32, and an end of this eccentric orfice 32 is a groove 33 (greater than eccentric orfice 32) (shown in Fig. 3,4); This handle 3 is enclosed within on the bearing pin 5 that wears in the overhanging arm 131 of overcoat 1 with pivot in the eccentric orfice 32.

Eccentric hock 4 is to constitute (as shown in Figure 5) by a lasso 42 and overhanging hock 41 thereof, and this off-centre hock 4 is nested with at cylinder boss 31 outer rims of handle 3 and its hock 41 with its lasso 42 activities and is meshed with toothed wheel 21 in the rotating shaft 2.

Overhanging fixed head 6 is bending plates that an end is offered a polygonal hole 61, with polygonal hole 61 sliding fits on the polygonal body 11 of overcoat 1, when the other end of overhanging fixed head 6 is subjected to fixture to stop the (as: fixture at screw place on rotation direction, or another screw ailhead, not shown), just can limit overcoat 1 and rotate; Overhanging fixed head 6 can move axially, and its polygonal hole 61 skies are enclosed within on the cylinder 12 of overcoat 1 (as shown in Figure 1).

Return spring 8 places the groove 33 of handle 3, and the one overhanging end is against the evagination opening 13 right walls of overcoat 1, and another overhanging end is against handle 3 own (as shown in Figure 2).

Holddown spring 9 places evagination opening 13, and the one end is fixed on the left wall of overcoat 1 evagination opening 13, and the other end makes hock 41 press to toothed wheel 21 (as shown in Figure 2) against the back side of eccentric hock 4 hocks 41.

The operation and the principle thereof of present embodiment are as follows:

When needs are screwed on screw, this moment, overhanging fixed head 6 skies were enclosed within on the cylinder 12 of overcoat 1, earlier screw tube 7 is enclosed within screw head (six sides or four directions), then counter-clockwise direction is pulled handle 3 certain angles (as shown in Figure 2), return spring 8 drives that overcoats 1 are also corresponding to turn over an angle, and cylinder boss 31 drives eccentric hock 4 slips over equal angular on toothed wheel 21 arc length, and rotating shaft 2 is not rotated; Pull handle 3 more in the direction of the clock, then low outer cover 1 in these handle 3 left sides and drive overcoat 12 center lines rotation around the shaft together, simultaneously, cylinder boss 31 also drives eccentric hock 4 and rotates, and should drive toothed wheel 21 rotations by off-centre hock 4 this moment, thereby rotating shaft 2 clockwise rotates, screw (not shown) on the screw sleeve 7, be screwed into retaining thread spare, the handle 3 that so swings back and forth (2 centers around the shaft), screw just screw in fast; Rotating shaft 2 each angles of rotating are identical with the angle of handle 3 swings;

When needs are tightened screw at last (generally in the end about half-turn), on the polygonal body 11 with overhanging fixed head 6 sliding outer covers 1, and limit overhanging fixed head 6 and rotate (overhanging fixed head 6 other ends are against fixedly helical member or another screw head of being twisted screw), be that overcoat 1 maintains static, during then counter-clockwise swing handle 3, handle 3 compression retracteding position springs 8 are until evagination opening 13 right side walls (as shown in phantom in Figure 2), eccentric hock 4 just slips over a tooth of toothed wheel 21 simultaneously, pull handle 3 (rotating) then clockwise around bearing pin 5 center lines, by cylinder boss 31, eccentric hock 4 drives toothed wheel 21 and rotates a tooth, rotating shaft 2, screw sleeve 7 drives low-angle of screw turns (less than handle 3 pendulum angles), because the eccentric throw and the formed leverage of handle 3 length of cylinder boss 31 and eccentric orfice (32), make rotating shaft 2 produce reinforcement and rotate, make screw-driving.

Equally, when needs Panasonic screw, rotating shaft 2 needs inhour to rotate, this moment is as long as be socketed in screw sleeve 7 on the joint in many ways 22 of rotating shaft 2 other ends, overhanging fixed head 6 also is enclosed within the other end of overcoat 1, press the opposite action of said process, promptly first reinforcement unclamps about half-turn screw, then till the screw that gets loose fast by reinforcement not.

Claims

1, a kind of double speed reinforcement spanner comprises overcoat (1), rotating shaft (2), handle (3) and screw sleeve (7), wherein, rotating shaft (2) is bearing in the overcoat (1), the centre of this rotating shaft (2) has toothed wheel (21) and exposes two ends and is joint (22) in many ways, and screw sleeve (7) is engaged in one in many ways on the joint (22), it is characterized in that: sheathed one overhanging fixed head (6) on the outer rim of overcoat (1), also offer an evagination opening (13) on the overcoat (1), in this evagination opening (13), wear a bearing pin (5), one termination of handle (3) has a cylinder boss (31), this cylinder boss (31) is provided with an eccentric orfice (32), and the end at this eccentric orfice (32) is provided with a groove (33) again; At sheathed eccentric hock (4) and the hock (41) and toothed wheel (21) engagement that constitutes by a lasso (42) and overhanging hock (41) thereof of cylinder boss (31) outer rim, the eccentric orfice (32) of handle (3) cooperates with bearing pin (5) is movable again, in the groove (33) of handle (3), be provided with two ends respectively against the return spring (8) of right wall of evagination opening (13) and handle (3) itself, in evagination opening (13), be provided with two ends respectively against the holddown spring (9) at hock (41) back side of left wall of evagination opening (13) and eccentric hock (4).

2, by the described double speed reinforcement of claim 1 spanner, it is characterized in that: described toothed wheel (21) is gear or ratchet, and corresponding described eccentric hock (4) is tooth bar or ratchet.