CN2506845Y

CN2506845Y - Cardan joint

Info

Publication number: CN2506845Y
Application number: CN 01254490
Authority: CN
Inventors: 邵中民
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-30
Filing date: 2001-10-30
Publication date: 2002-08-21
Anticipated expiration: 2011-10-30

Abstract

The utility model provides a universal joint, belonging to the machinery technical field, which solves the problem that no lock function is provided in the existing common universal joints. The universal joint is used for connecting a driving shaft and a driven shaft and comprises an upper joint and a lower joint, wherein, the surface of the upper joint is provided with a plurality of straight-tooth teeth, while the lower joint is positioned in an inner cavity at the end of the driven shaft, the surface of the lower joint is also provided with a plurality of straight-tooth teeth, both the upper joint and the lower joint are positioned in an outer sleeve which is connected with the end of the driven shaft through threads, a regulation base is arranged between the outer sleeve and the upper joint, the regulation base is articulated with the upper joint through a peg, while a position limiting device used for preventing the regulation base from detaching is arranged on the outer sleeve, a circumferential reciprocal structure is arranged between the regulation base and the lower joint. In the utility model, the straight-tooth teeth at the surfaces of the outer sleeve and the lower joint have a locking function. The universal joint can not only flexibly regulate the inclined angle and direction of the driving shaft, but also can be locked to ensure the angle and direction to keep the same.

Description

Universal joint

Technical field

The utility model belongs to field of mechanical technique, particularly a kind of universal joint.

Background technique

Common universal joint is generally used for driving torque.In universal joint, the direction of driving shaft and driven axle is constantly changing.In order to adapt to the needs that run up, in the universal ball joint that Chinese patent 93218023X provides, between driving shaft and driven axle, also be provided with the structure of jack shaft.But in daily life, often require two axles that universal joint connected are remained on a constant angles, and make wherein an axle be used to be supported with the article of constant weight.As use universal joint shaft to support article such as parasol and umbrella or desk lamp, not only requirement can turn to certain angle flexibly, but also needs its angle to keep stable.For example for directly inserting in the parasol and umbrella that is used for sunshade on the ground or hides rain, because following the dropping on sometime of the irradiation of the sun or rainwater has specific angle in the section, if adopt the umbrella bar is divided into two sections when connecting with Cardan joint, the angle of its umbrella bar epimere can free adjusting, but can be difficult to keep the angle that regulated because of the effect of wind-force or other external force.This is because present common universal joint does not have lock function to cause.

Summary of the invention

The purpose of this utility model is in order to address the above problem, to provide a kind of structure novel universal joint, and it can not only the regulated at will angle, and has lock function, and the angle that mixes up is remained unchanged.

The purpose of this utility model realizes by following technical proposal: this universal joint is used to connect driving shaft and driven axle, it comprises upper joint and hypozygal, upper joint is fixed on the end of driving shaft, upper joint is protruding sphere, the surface of upper joint is provided with some straight-tooth teeth, hypozygal is arranged in the inner chamber of driven axle end, the upper surface of hypozygal is provided with some the straight-tooth teeth that the straight-tooth tooth with the upper joint surface matches, upper joint and hypozygal all are positioned at an overcoat, overcoat connects with the end of driven axle by screw thread, be provided with an adjustment seat between overcoat and the upper joint, adjustment seat is hinged by pin and upper joint, the direction of pin is parallel to the direction of upper joint surface straight-tooth tooth, puts outward a limit stoper that prevents that adjustment seat breaks away from is set, and a circumferential serial verb construction is arranged between adjustment seat and the hypozygal.

Above-mentioned limit stoper is located at jump ring between overcoat and the adjustment seat by one and the convex shoulder of adjustment seat sidepiece is formed.By the barrier effect of jump ring, prevent that adjustment seat breaks away from overcoat, but adjustment seat can be rotated freely in overcoat.

Above-mentioned circumferential serial verb construction is the both sides that the bottom of adjustment seat is sandwiched in hypozygal.When adjustment seat was rotated, hypozygal can be along with rotating together.Circumferentially serial verb construction also can be that through hole is set on the hypozygal, and the bearing pin that inserts in the through hole is arranged at the adjustment seat bottom.Certainly alternate manner can also be arranged, its purpose is all the same, be exactly and then rotation together of hypozygal when adjustment seat is rotated, but when adjustment seat moved up and down vertically, hypozygal is motionless.

In this universal joint, because upper joint and adjustment seat are hinged, upper joint can swing, and regulates the angle of inclination of driving shaft; Simultaneously, adjustment seat is free to rotate in overcoat, therefore can regulate the true dip direction of driving shaft.In the utility model, overcoat and up and down the straight-tooth tooth of articular surface be lock function.Particularly, when regulating the driving shaft angle of inclination, last hypozygal separation, upper joint can freely swing, in case upper joint with after hypozygal is meshed by its surperficial straight-tooth tooth, the angle of inclination of driving shaft is just constant; On the other hand, reverse upper joint, regulate the true dip direction of driving shaft, after mixing up, by screw thread overcoat is tightened against on the driven axle, the inboard squeeze adjustments seat of overcoat can not rotate adjustment seat.The true dip direction that like this, also just can guarantee driving shaft is constant.

Compared with prior art, the utility model is by the straight-tooth tooth effect of overcoat and last hypozygal, angle of inclination and direction that can not only the free adjusting driving shaft, and can lock, its angle and direction is remained unchanged, be suitable for the usage requirement of some occasion such as parasol and umbrella or desk lamp fully.Simultaneously, of the present utility model simple to operation, have higher utility.

Description of drawings

Fig. 1 is the generalized section of the universal joint that provides of the utility model.

Fig. 2 is the generalized section of another direction of the universal joint that provides of the utility model.

Fig. 3 is the profile schematic representation that upper joint connects with adjustment seat in the universal joint that provides of the utility model.

Fig. 4 is the profile schematic representation of hypozygal in the universal joint that provides of the utility model.

Among the figure, 1, upper joint; 2, hypozygal; 3, driving shaft; 4, driven axle; 5, adjustment seat; 50, convex shoulder; 51, pin; 6, overcoat; 7, straight-tooth tooth; 8, jump ring; 9, pin.

Embodiment

As depicted in figs. 1 and 2, the universal joint that provides of the utility model comprises upper joint 1, hypozygal 2, adjustment seat 5 and overcoat 6 etc.Upper joint 1 is connected with driving shaft 3, and 2 of hypozygals are positioned in the inner chamber of driven axle 4 ends.In the present embodiment, upper joint 1 is similar to spheroid, and its lower surface is provided with some straight-tooth teeth 7.The upper surface of hypozygal 2 also is provided with straight-tooth tooth 7, and the straight-tooth tooth 7 on upper joint 1 and the hypozygal 2 can be meshing with each other.

As shown in Figure 1, upper joint 1 is positioned at adjustment seat 5, and and adjustment seat 5 between by two pins 9 hinged.The direction of pin 9 is parallel with the direction of upper joint 1 surperficial straight-tooth tooth 7.This structure can be regulated the angle of inclination of driving shaft 3.Whole adjustment seat 5 is positioned at overcoat 6.The outer surface of adjustment seat 5 has a convex shoulder 50, establishes a jump ring 8 on the overcoat 6, blocks convex shoulder 50 by jump ring 8, make adjustment seat 5 can not break away from overcoat 6, but adjustment seat 5 is free to rotate in overcoat 6.Like this, nature can have been regulated the true dip direction of driving shaft 3.

As depicted in figs. 1 and 2, in the present embodiment, the top of adjustment seat 5 outer surfaces is conical surface, and overcoat 6 internal surfaces have the shape that matches therewith; Simultaneously, overcoat 6 connects with driven axle 4 by screw thread.Therefore, be screwed in driven axle 4 processes at overcoat 6, overcoat 6 is squeeze adjustments seat 5 constantly, to the last makes adjustment seat 5 motionless.At this moment, upper joint 1 also is meshing with each other with hypozygal 2, so universal joint is in the lock state.

As shown in Figure 3 and Figure 4, two pins 51 are arranged at the bottom of adjustment seat 5, and the bi-side of hypozygal 2 are the plane.Two pins 51 by adjustment seat 5 are sandwiched on the hypozygal 2, make to be circumferential serial verb construction between adjustment seat 5 and the hypozygal 2.That is to say that in adjustment seat 5 rotation processes, hypozygal 2 also and then rotates together, thereby guarantee that the straight-tooth tooth 7 on the hypozygal 2 is consistent with straight-tooth tooth 7 directions on the upper joint 1.But, making when moving on the adjustment seat 5 easing out overcoat 6, hypozygal 2 is motionless.Like this, the straight-tooth tooth 7 of last hypozygal 1,2 can separate, so that regulate the angle of inclination of driving shaft 3.

Claims

1, a kind of universal joint, be used to connect driving shaft (3) and driven axle (4), it comprises upper joint (1) and hypozygal (2), upper joint (1) is fixed on the end of driving shaft (3), upper joint (1) is protruding sphere, the surface that it is characterized in that described upper joint (1) is provided with some straight-tooth teeth (7), hypozygal (2) is arranged in the inner chamber of driven axle (4) end, some the straight-tooth teeth (7) that the straight-tooth tooth (7) that the upper surface of hypozygal (2) is provided with and upper joint (1) is surperficial matches, upper joint (1) and hypozygal (2) all are positioned at an overcoat (6), overcoat (6) connects by the end of screw thread with driven axle (4), be provided with an adjustment seat (5) between overcoat (6) and the upper joint (1), adjustment seat (5) is hinged by pin (9) and upper joint (1), the direction of pin (9) is parallel to the direction of the surperficial straight-tooth tooth of upper joint (1) (7), a limit stoper that prevents that adjustment seat (5) breaks away from is set on the overcoat (6), between adjustment seat (5) and the hypozygal (2) a circumferential serial verb construction is arranged.

2, universal joint according to claim 1 is characterized in that described limit stoper is located at jump ring (8) between overcoat (6) and the adjustment seat (5) by one and the convex shoulder (50) of adjustment seat (5) sidepiece is formed.

3, universal joint according to claim 1 and 2 is characterized in that described circumferential serial verb construction is the both sides that the bottom of adjustment seat (5) is sandwiched in hypozygal (2).

4, universal joint according to claim 1 and 2 is characterized in that described circumferential serial verb construction is on the hypozygal (2) through hole to be set, and the bearing pin that inserts in the through hole is arranged at adjustment seat (5) bottom.

5, universal joint according to claim 1 and 2 is characterized in that the top of described adjustment seat (5) outer surface is conical surface, and overcoat (6) internal surface has the shape that matches therewith.

6, universal joint according to claim 3 it is characterized in that two pins (51) are arranged at the bottom of described adjustment seat (5), and the bi-side of hypozygal (2) is the plane.