CN2442857Y

CN2442857Y - Labour-saver for driving screw and nut

Info

Publication number: CN2442857Y
Application number: CN 00251820
Authority: CN
Inventors: 李忠宣; 魏坚强
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-13
Filing date: 2000-09-13
Publication date: 2001-08-15
Anticipated expiration: 2010-09-13

Abstract

The utility model relates to a labour-saver for driving screws and nuts, comprising an input major axis, a transmission gear set, an output minor axis, a casing, a stop and a supporter. The transmission gear set is composed of a stud gear of the end of the input major axis, a planetary gear meshed with the stud gear and an inwardlydished gear tray which can be meshed and sleeved with the stud gear. When the stud gear has the variable speed transmission when engaged with the planetary gear, unscrewing or screwing the nut saves labor by utilizing the utility model. When the stud gear has non variable speed transmission when pushed to the inwardlydished gear to be meshed and sleeved, after the utility model is used to unscrew the nut, fast dismounting the nut saves time and quick. The utility model boasts of advantages of simple structure, convenient operation, time saving, and labour saving.

Description

Screw nut degree of tightness labour saver

The utility model relates to a kind of dismounting utensil of fastener, particularly about screw-nut degree of tightness labour saver.

The dismounting utensil of general fastener mostly is pliers or spanner.Dismounting for motor tire, as change tire and will unload fastener on the lower hub earlier, waste time and energy very much with the screw nut on the spanner dismounting wheel hub, thereby the unmanned common wrench of using is engaged in this work, standby dismounting wheel hub fastener is a kind of sleeve-type spanner on the existing automobile, when using, it saves the strength, though efficient unlike the common wrench height, is still adopted by everybody at present.CN2288822Y discloses a kind of Wrench providing for torque amplification, it is improved the sleeve-type spanner, one-level force-increasing mechanism and secondary force-increasing mechanism have been designed, its other parts are many, complex structure, particularly the secondary force-increasing mechanism is located at the adjustable force limiting device and the controllable type limit power handgrip of its shell termination, complicated many costs of the part height in addition of these block constructions in addition except the planetary wheel force-increasing mechanism.Concerning the user, just can carry out second stage reinforcement operation by the adjusting of adjustable force limiting device and controllable type limit power handgrip, as if be difficult to grasp, particularly, require service tools volume commonly used little, in light weight for popular roadlice, institute takes up space little, and access is convenient, processing ease.Therefore this kind Wrench providing for torque amplification structure seems complicated, stiff heavy and impracticable.

The purpose of this utility model is at above problem, design a kind of simple in structure, processing ease, the screw nut degree of tightness labour saver of the little heavy and light of volume.

The design plan that the utility model adopts is, screw nut degree of tightness labour saver, it comprises input major axis, driving gear set, output minor axis, shell, limiting device and support, it is characterized in that the stud wheel of driving gear set, with the stud wheel planet gear meshed with can form with the inner concave gear pallet that stud wheel is nibbled fit mutually by input major axis end.

Structural advantages of the present utility model is to obtain different transmitting ratios by engagements different between the transmission gear, carries out speed change, reaches laborsaving and purpose that raise the efficiency.As the stud wheel of importing the major axis end is meshed with the planetary wheel of its outer rim, compensating-gear shaft drives the inner concave gear pallet that links to each other with the output minor axis and rotates, constitute the change gear group, reach deceleration labour-saving effect, this is very effective in the time need turning on very tight nut with bigger power.The inner concave gear that the stud wheel of and for example importing the major axis end is connected with the output minor axis is directly nibbled not speed change driving gear set of the fashionable formation of cover mutually, this is unscrewing under the nut situation, in the time of need unloading nut fast since the input major axis with output minor axis with fast transmission, therefore not only laborsaving but also quick, improve work efficiency.Present design only changes in the shape and the engagement of transmission gear, but reaches laborsaving, fast speed effect, saves many loaded down with trivial details other parts simultaneously, make simple in structure, reliable operation, processing ease, advantage is remarkable especially.

Fig. 1 is a section of structure of the present utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Structure and the mode of operation of embodiment are described below in conjunction with accompanying drawing.

Major part of the present utility model has shell (3,16,17), input major axis (2) driving gear set, limiting device (5,21) and with the output minor axis (12) of major axis coaxial inner conductor.Major axis surrounds major axis shell (3) outward, establishes axle sleeve (20) between major axis and the major axis shell (3), and the major axis top is rectangle input adapter (1), and this joint can be exported join (Fig. 1 does not retouch out) with rocking bar or engine.The stud wheel (14) of input major axis end is formed the change gear group with its planet gear meshed (6) and the Rotary tray (15) that joins with compensating-gear shaft.For making stressed even stability of rotation, this enforcement is adopted 3 identical planetary wheels (6) to be equilateral triangle and is arranged, sees Fig. 2.Closure head (17) is provided with the circular guideway (18) for the compensating-gear shaft operation.The Rotary tray (15) that inner concave gear can be joined with compensating-gear shaft (8) by an end middlely just in time can be formed with the indent tooth (9) that stud wheel be nibbled fit mutually.Axis hole (8) on the pallet (15) of the other end of compensating-gear shaft and inner concave gear outer rim is connected, when stud wheel (14) rotates and meshes with planetary wheel (6) (among the figure 7 and 19 when rotating pressure line) for both, planetary wheel drives pallet (15) and rotates, thereby power is passed to output minor axis (12).Transmitting ratio of the present utility model requires to design according to difference.The present embodiment transmitting ratio is to be at 8: 1 that major axis (2) rotates 8 circles, and minor axis (12) rotates 1 circle, or major axis imports 1 kgf, and minor axis is exported 8 kgfs.This kind engagement and transmitting ratio are applicable to be tightened or unscrews nut.Another transmitting ratio is 1: 1, is nested to mesh by the stud wheel (14) of importing the major axis end and inner concave gear and forms not speed change driving gear set.It is by the limiting device regulating control, establish the parallel indent location mortise (21) in two roads on the major axis (2), establish on major axis overcoat (3) sidewall with major axis (2) and go up the corresponding locating tab of inner groovy (21) (5), it is used for fixing the residing position of major axis, and fixing pin (5) outer periphery compression spring (4) is so that decide can be fixed in the indent positioning groove slightly.When having dialled locating tab (5), major axis (2) is pushed away downwards, stud wheel (14) is meshed with the interior straight-tooth of inner concave gear, major axis this moment (2) turns around, and minor axis (12) is also followed and turned around, and promptly major axis is imported 1 kgf, minor axis is also exported a kgf, it is used to unscrew when unloading nut fast behind the nut, and is both laborsaving, quick again.

Imput power of the present utility model, except that manpower, also can be electronic, pneumatic and other power inputs, insert rectangle input adapter (1) as output shaft and get final product electrical motor, insert motor power after, the consumption of minimizing kinetic energy has the effect of tangible energy and labour saving.

Claims

1, screw nut degree of tightness labour saver, it comprises input major axis, driving gear set, output minor axis, shell, limiting device and support is characterized in that driving gear set is by the stud wheel (14) of input major axis end and stud wheel planet gear meshed (6) with can form with the inner concave gear pallet (15) that stud wheel is nibbled fit mutually.

2, screw nut degree of tightness labour saver as claimed in claim 1 is characterized in that the Rotary tray (15) that inner concave gear can be joined with compensating-gear shaft (8) by an end, middlely just in time can form with the indent tooth (9) that stud wheel be nibbled fit mutually.

3, screw nut degree of tightness labour saver as claimed in claim 1 or 2 is characterized in that forming the change gear group by the stud wheel (14) of input major axis end and 3 planetary wheels of its ingear (6) and the Rotary tray (15) that joins with compensating-gear shaft.

4, screw nut degree of tightness labour saver as claimed in claim 1 or 2 is characterized in that nibbling fit by the stud wheel (14) of input major axis end mutually with inner concave gear forms not speed change driving gear set.

5, screw nut degree of tightness labour saver as claimed in claim 1 is characterized in that outer casing upper cover (17) is provided with the circular guideway (18) for the compensating-gear shaft operation.

6, screw nut degree of tightness labour saver as claimed in claim 1 is characterized in that limiting device by establishing the parallel indent positioning groove (21) in two roads on the input major axis (2), is located at locating tab (5) and compression spring (4) composition on major axis shell (3) sidewall.