CN2082663U

CN2082663U - Combined screw driver capable of setting up definite force

Info

Publication number: CN2082663U
Application number: CN 90208664
Authority: CN
Inventors: 杨其昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-11
Filing date: 1990-06-11
Publication date: 1991-08-14

Abstract

The utility model relates to a combined screw driver capable of setting up definite force, which is designed for solving the problem of the assembly of the definite force of a threaded fastener. The inner chamber of the handgrip of the combined screw driver capable of setting up definite force is provided with a compression spring controlled by an adjusting screw and an adjusting nut matched with the adjusting screw, and the inner chamber is also provided with a first clutching block and a second clutching block which are in concave and convex key groove type fit; the lateral faces of the key and the groove of the first clutching block and the second clutching block are all spiral rotation faces; the first clutching block and the second clutching block are pressed close. When torque is screwed to predetermined value, the first and the second clutch blocks start to slip. Moreover, a changeable head which is clamped by the second clutch block connected with a common key groove and a hollow shaft with a 180 DEG notch at the upper end of a clamping head no longer rotates.

Description

Combined screw driver capable of setting up definite force

Utility model can be set up a kind of power of deciding assembly tool that power combined screw bottle opener is a threaded fastener.Have only the combination bottle opener in the market, yet there are no and to set up power combined screw bottle opener.

The purpose of the utility model design is in order to improve the assembly reliability of equipment.

The utility model is to be provided with in bottle opener handle inside to set up force mechanisms.At shell (2) with use with it in the intracavity of handle that the front shroud (14) of thread connection formed, the compression spring (7) that has the adjustment nut (5) being adjusted screw (4) and cooperate with it to be controlled, and be compressed between spring (7) compressing a pair of to convex-concave keyway formula cooperates, the side of its key and groove is the side outer edge is 1 jiao of α at periphery the spiral surfaces of revolution.The so-called spiral surfaces of revolution is exactly to have on the linear cutting equipment of Three Degree Of Freedom, the axial line of the blank after clutch block I (8) or clutch II (9) fine finishining is on the position that intersects vertically with line of cut, when the clutch block blank is made the rectilinear motion of corresponding speed with the corresponding angular speed rotation of 1 jiao of α the time to the line of cut direction.The clutch block blank stops moving linearly when the rectilinear motion value reaches t1 or t2, the clutch block blank continues to rotate to when meeting 2 jiaos of α afterwards, the clutch block blank begins to do the rectilinear motion opposite with aforementioned direction, and the face of processing at twice rectilinear motion promptly becomes the spiral surfaces of revolution.Become the dead angle because the spiral surfaces of revolution is 90 ° for 1 jiao at the α of axle center place, so clutch block I, II (8,9) there is the hollow parts greater than the t1 or the t2 degree of depth.In whole clutch process, be the face contact like this between clutch block I, the II (8,9), thereby reduced contact stress and reduced wearing and tearing, improved service life, also make this certain force instrument radial dimension reduce to minimum and form handle type, equally also just might make clutch block I, II (8,9) adopt the engineering plastics injection mo(u)lding.

The recessed groove of the key that there is a projection at middle part, the lower end of clutch block II (9) and chuck (13) upper center matches so that carry-over moment has so not only avoided iron chains embedding moulding to simplify injection mold, and can also make its automatic aligning on the part direction.The bottom of chuck (13) is to have the hollow shaft of 180 ° of symmetrical otch so that the insertion and the carry-over moment of interchangeable head (15), and crimps onto to a certain degree to enable to clamp automatically interchangeable head (15) at opening part bottom.Following lumen pore and steel ball (11) and the simple and easy bearing of packing ring (10) (12) composition biserial that one square circumference convex shoulder and shell (2) are arranged on the cylindrical at chuck (13) middle part are to improve the flexibility of the design's product.

Shell (2) all is provided with non-slip groove with the outer round surface of front shroud (14).The interior upward vestibule wall of shell (2) has the spill keyway of two 180 ° of symmetrical above-below directions, with have the adjustment nut (5) and the clutch block I (8) of the protruding feather key of two 180 ° of symmetries to match in cylindrical direct-axis heart line direction, make it the time can only move up and down and can not rotate in work.

The bottom of front shroud (14) extends to the lower end of chuck (13), so that protection, support and stabilization are played in chuck (13) bottom.

Deciding in intracavity of handle is provided with rubber washer (3), (10) and steel washer (6), (12) respectively on each enough power transmission contact-making surface of power machine, so that the power transmission contact stress evenly improves the feel suitability degree with the alleviation impulsive force.

The designed product of the utility model is when work, because of compression spring (7) compressing clutch block I, II (8,9) are closed tightly it, after screw-down torque reaches predetermined value, clutch block I, II begin to skid between (8,9), and no longer rotate to realize deciding moment interchangeable (15) that clutch block II (9) that connects with common keyway with chuck (13) upper end and bottom clamp in the hollow shaft that has 180 ° of otch.

Adjusting screw (4) by rotation drives the adjustment nut (5) that cooperates with it and moves up and down and change compression spring (7) and the pressure between clutch block I, the II (8,9) is realized adjusting decide moment.Can enlarge the adjustable extent of moment again by the compression spring (7) of changing different-stiffness.

The utility model design removes compression spring (7), holding screw (1), packing ring (6), (12), rubber washer (3), (10), chuck (13), steel ball (11) and interchangeable head (15) are outer all can to adopt the engineering plastics injection mo(u)lding, wherein adjust screw (4) and clutch block I, II (8,9) can adopt the carbon fibre engineering plastics, all the other can adopt polycarbonate engineering plastic.

Through above stated specification as can be seen the utility model design have novelty, small and exquisite flexibly, high, the expensive low characteristics of production efficiency of precision.But still being it, most important character can improve the reliability of assembling object and the socio-economic efficiency that thereupon brings.

The utility model design is mainly used in the power of deciding of the threaded fastener of M2～M6 and assembles, wherein the required moment scope of M6 is a 392N.cm(aluminium)～6468N.cm(30crMnSiA), if its required moment of the big again back of threaded fastener size surpasses metal manufacturing that hand-power in time can be amplified or select for use, add cross bar so that firmly operate at head again, to enlarge the design's the scope of application.

Description of drawings: 1. holding screw; 2. shell; 3. rubber washer; 4. adjustment screw; 5. adjustment nut; 6. packing ring; 7. compression spring; 8. clutch block I; 9. clutch block II 10. rubber washers; 11. steel ball; 12. packing ring; 13. chuck; 14. front shroud; 15. interchangeable head.

Claims

1, can set up power group screwdriver mainly is to be provided with in bottle opener handle inside to set up force mechanisms, it comprises: holding screw, shell, packing ring, adjust screw, adjust nut, the compression spring, the clutch block I, II, steel ball, chuck, front shroud and interchangeable head, it is characterized in that: at shell (2) with use with it in the intracavity of handle that the front shroud (14) of thread connection constituted, there is one to be adjusted compression spring (7) that screw (4) and adjustment nut with matching (5) controlled and by the clutch block I that cooperates for convex-concave keyway formula between its compressing a pair of, II (8), (9), clutch block I (8) and adjust nut (5) and have two to match along the groove on the epicoele wall in the protruding feather key of 180 ° of symmetries of direction of axis line and the shell (2) it can only be moved up and down at cylindrical, the upper end of chuck (13) has the key of the lower end projection of recessed groove and clutch block II (9) to link, chuck (13), the middle part cylindrical on the circumference convex shoulder and interior down vestibule and the steel ball (11) and the packing ring (10) of shell (2), (12) form the simple and easy bearing of biserial, the bottom of chuck (13) has in the hollow shaft of 180 ° of symmetrical otch and is clamping interchangeable head (15).

2, according to the claim 1 described power of setting combined screw bottle opener, it is characterized in that: be that the bump type keyway cooperates between clutch block I, the II (8,9), the side of its key and groove is the side outer edge is α 1 angle on periphery the spiral surfaces of revolution.