CN2082224U - Reinforced wrench - Google Patents

Abstract

The utility model provides a reinforced wrench, which comprises a box wrench composed of a sleeve barrel lining 1, a sleeve barrel 2, a square connecting rod 3, rocking bars 4, 4, a ratchet wheel 5, a pawl 6 and a spring 7, a pin shaft 8, a chain rod 9, an eccentrical shaft 10, a handle 11, a positioning sleeve 12 and a positioning lining 13. The reinforced wrench is mainly used for fastening or dismounting screw bolts or nuts of large specifications. The reinforced wrench reinforces for a plurality of times to scores of times more than common monkey wrenches.

Description

Reinforced wrench

The utility model relates to the spanner of hand tools.Be mainly used in the dismounting of big specification bolt or nut and fastening.

For a long time, people adopt monkey wrench more, box spanner, double offset ring spanner comes fastening or demounting bolt or nut, to the bolt or the nut of big or corrosion, dismounting or require great effort very much when fastening, also once used the spanner that utilizes the geared system reinforcement in the prior art, but because Gear Processing is difficult, and easy broken teeth, influence work, the use of these spanners is restricted.

The objective of the invention is to overcome the shortcoming of above-mentioned spanner, provide a kind of simple in structure, be suitable for fastening or dismantle the bolt of big specification or corrosion or the reinforcement spanner of nut.

The purpose of this utility model is realized by following version.Be provided with sleeve bushing 1, sleeve 2, cubic extension bar 3, rocking bar 4,4 ', ratchet 5, ratchet 6, the box spanner that spring 7 constitutes, and bearing pin 8, chain bar 9, eccentric shaft 10, handle 11, positioning sleeve 12, positioning adapter 13.Box spanner links through bearing pin 8 and chain bar 9, and the other end of chain bar 9 links through eccentric shaft 10 and positioning sleeve 12 and handle 11.Described box spanner, its sleeve bushing 1 is a portal structures, and a hole greater than the respective bolt diameter is arranged at the top, and sleeve bushing 1 slides interchangeably and inserts in the sleeve 2 bottom hex holes, and dismantle or fastening bolt or nut 15 with this, also can reduce the quantity of sleeve 2.The outer rim of ratchet 5 is zero asymmetric stepped tooth for the working flank inclination angle, and its middle part has square opening, and the aperture is identical with sleeve 2 top square holes.Rocking bar 4,4 ' front end be concentric equal diameter hole, be enclosed within slidably on the ratchet 5 both sides boss, and by several screws (not drawing in the accompanying drawing) with rocking bar 4,4 ' be fixed together.Four directions extension bar 3 inserts sleeve 2 slidably, in the square hole of ratchet 5.Along ratchet 5 radially be provided with several ratchets 6, in order to change the corner of ratchet 5.Ratchet 6 inserts in the rectangular channel of rocking bar 4 slidably, and by spring 7 supportings.The claw angle of ratchet 6 is slightly less than the teeth groove angle of ratchet 5.One end of chain bar 9 is provided with a hole that can be slidably inserted into eccentric shaft 10, and the other end is provided with the pin-and-hole that several isodiametric stagger arrangement are arranged, bearing pin 8 insert slidably rocking bar 4,4 ' and the pin-and-hole of chain bar 9 in.Eccentric shaft 10 tops, the middle part concentric, top is hexagon, the middle part is the garden cylindricality, the bottom one arranged off-centre arranged with the axle of garden, middle part post with diameter, the bottom shaft part inserts positioning sleeve 12 top endoporus slidably.Positioning adapter 13 inserts in the positioning sleeve 12 bottom inner hexagonal holes slidably, and is enclosed within slidably on bolt adjacent with bolt to be tightened or removed or nut 15 or the nut 14 with this and plays the role of positioning, and can reduce the quantity of positioning sleeve 12 simultaneously.Handle 11 long 250mm-300mm, the end has a quincunx hole, is enclosed within slidably on six prisms of eccentric shaft 10 tops, and eccentric shaft 10 relatively rotates with handle 11 nothings.

Fig. 1 is the structure chart of reinforcement spanner described in the utility model.

Fig. 2 is the profile of reinforcement spanner described in the utility model by Fig. 3 B-B.

Fig. 3 is the revolved section expanded view of reinforcement spanner described in the utility model by Figure 1A-A.

Referring to accompanying drawing 1, CD is the centre-to-centre spacing of ratchet 5 and bearing pin 8, and DE is the centre-to-centre spacing on bearing pin 8 and eccentric shaft top, and EF is the eccentric throw of eccentric shaft 10 tops and bottom.If it is M that handle affacts the moment that F orders through the E point, omit each frictional force and disregard, then the moment P that is subjected to of bolt or nut is:

P＝ (CD.M.Sin∠CDE)/(EF.Sin∠DEF)

Get and decide CD＞EF, adjust DE and make Sin ∠ CDE＞Sin ∠ DEF, then P＞M.In the time of ∠ DEF=180 °, promptly during the DEF conllinear, P obtains maximum.As seen reinforcement spanner described in the utility model increases several times of moments to tens hundreds of times than normal activity spanner, is enough to dismounting or fastening big specification bolt or nut.

During use, box spanner is enclosed within on to be removed or fastening bolt or the nut 15, positioning adapter 13 is enclosed within on adjacent bolt or the nut 14, adjust the position of bearing pin 8, make ∠ CDE be slightly less than 90 °, ∠ DEF is slightly less than or equals 180 °, can be fastening or dismantle big specification bolt or nut.

Claims (3)

1, a kind of by sleeve bushing 1, sleeve 2, cubic extension bar 3, rocking bar 4,4 ', ratchet 5, ratchet 6, spring 7, bearing pin 8, chain bar 9, eccentric shaft 10, handle 11, positioning sleeve 12, the reinforcement spanner that positioning adapter 13 constitutes is characterized in that box spanner is linked by bearing pin 8 and chain bar 9, and the other end of chain bar 9 links through eccentric shaft 10 and positioning sleeve 12 and handle 11.

2, reinforcement spanner according to claim 1 is characterized in that the pin-and-hole that has several equal diameter stagger arrangement to arrange on the chain bar 9.

3, reinforcement spanner according to claim 1, the top that it is characterized in that eccentric shaft 10 is six prisms, middle part and bottom are the garden cylindricality.

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