CN2280173Y - Multiple guide screw telescopic apparatus - Google Patents

Abstract

The utility model provides a telescopic device with a plurality of guide screws, comprising a plurality of telescopic rods, guide screws which are respectively arranged in the middle parts of the telescopic rods, and a driving member which makes the guide screws rotate. The utility model is characterized in that the lower end of each guide screw has no threaded teeth. The lower part of each movable telescopic rod is provided with a nut which can be engaged with a guide screw. Each nut is connected together with each telescopic rod by a sleeve barrel which is sheathed on the nut and is fixedly connected with each movable telescopic rod. The utility model uses the pure mechanical transmission of the guide screws and the nuts to realize the lifting of each telescopic rod, so the utility model has the advantages of simple structure, accurate telescopic height, etc.

Description

More piece leading screw expansion device

The utility model relates to a kind of more piece leading screw expansion device, and it can be used for the medium and small object of lifting or uses as telescopic antenna.

Present existing multi-joint telescoping device generally is to adopt hydraulicdriven mode to realize the lifting of each section telescopic bar, such multi-joint telescoping device must be by multi-stage telescopic sleeve hydraulic cylinder and hydraulic station, loaded down with trivial details auxiliary hydraulic system facility such as control valve is formed, the 69-71 page or leaf of " hydraulics basis " book that Science Press published in 1981 has been put down in writing a kind of structure that can be used for the secondary telscoping hydaulic cylinder in the multi-joint telescoping device, it is by big piston, small piston, the big piston bar, small piston rod, cylinder body, formations such as center oil guide pipe and seal ring, complex structure not only, processing difficulties, and because hydraulic fluid leak is easy to generate problems such as flexible height inaccuracy.

For this reason, the purpose of this utility model is to overcome the deficiency of prior art, and a kind of multi-joint telescoping device is provided, and this device adopts pure mechanically operated mode, not only the multi-joint telescoping bar is simple in structure, easy to process, flexible highly accurate, and its auxiliary driving arrangement is also quite simple.

The technological scheme that realizes the utility model purpose is a kind of more piece leading screw expansion device, comprise the multi-joint telescoping bar that can be nested successively from coarse to fine, be positioned at the leading screw at flexible rod middle part, and the driver part that leading screw is rotated, its special way is that the lower end of leading screw does not have thread, the upper end has chamfering, below the movable flexible rod of every joint, be equipped with can with the nut of leading screw engagement, and nut fuses by being set in sleeve and flexible rod its outside, that be fixed on the flexible rod.

It is circumferentially linking to each other with sleeve by key of nut that above scheme is further improved, axial then by the stage clip of being located at nut end it is pressed on the sleeve.

And, the nut on the movable flexible rod of minor details, the stage casing of all the other nuts is equipped with the clamp of band thread, thread on the clamp and the thread on the nut have continuity, clamp links to each other with nut by bearing pin, can bearing pin be that rotate relative to nut at the center, clamp be stirred by the reed that is installed on the sleeve, and the inwall of its next section telescopic bar or gland is provided with and clamp position corresponding groove.

In addition, the inwall of every section telescopic bar is equipped with guide rail vertically, and each sleeve is provided with and the guide rail respective track.

As shown from the above technical solution, this multi-joint telescoping device is by the multi-joint telescoping bar, be positioned at the leading screw at flexible rod middle part, the nut that every section telescopic bar can be meshed with leading screw down, and the compositions such as driver part that leading screw is rotated, the leading screw lower end does not have thread, it has the length of thread slightly longer than a section telescopic bar, each saves nut by being set in its outside, the sleeve and the flexible rod that are fixed on the flexible rod fuse, when driver part makes the leading screw rotation, the head that is meshed with it saves nut and drives first section telescopic bar rising, when it rises to the top, the 2nd section telescopic bar is mentioned a bit of distance, the 2nd nut that saves and leading screw are finished close engagement, driving the 2nd section telescopic bar again rises, so analogize, until minor details flexible rod is raised to the leading screw top, this moment, device was in the state of stretching entirely, when the leading screw counter-rotating, then regain each section telescopic bar from coarse to fine successively by feed screw nut, device is got back to full reduced state, because this device is the lifting that realizes each section telescopic bar by screw-nut body, therefore the structure of flexible rod is compared with the multi-stage telescopic sleeve hydraulic cylinder greatly and is simplified, and processing technology is also much easier, again owing to be pure mechanical transmission, do not have leakage, so the adjustable height of flexible rod is very accurate, in addition, leading screw can directly be driven by motor etc., thereby the driving of this device is also very simple.

The utility model is described in further detail below with reference to accompanying drawing.

Fig. 1 is the general structure schematic representation of more piece leading screw expansion device.

Certain saves the cut-away view of movable flexible rod to Fig. 2 among Fig. 1.

Fig. 3 is that the A-A of Fig. 2 is to view.

Fig. 4 is that the B-B of Fig. 2 is to view.

As shown in Figure 1, the more piece leading screw expansion device that the utility model provides comprises the multi-joint telescoping bar that can be nested successively from coarse to fine, the number of flexible rod is made by oneself as required, four section telescopic bars 3 are arranged among Fig. 1,4,5,6, wherein three save 4,5,6 is movable, the top of each section telescopic bar is respectively equipped with gland 7,8,9,10, each gland 7,8,9,10 are sealed by seal ring, the middle part of flexible rod is a leading screw 2, the lower end of leading screw 2 does not have thread, upper end band chamfering 11, chamfering 11 can play the effect of guiding, there have the length of thread part slightly to be longer than the bar of a section telescopic bar on the leading screw 2 to be long, leading screw 2 can directly be driven by driver parts such as motor 1, again by Fig. 2, Fig. 3, Fig. 4 as can be known, at the movable flexible rod 4 of every joint, 5,6 below be respectively equipped with can with the nut 13 of leading screw 2 engagement, nut 13 is circumferentially linking to each other with sleeve 12 outside being set in it by key 14, nut 13 axially then is pressed in it on sleeve 12 by the stage clip 20 of its end, and sleeve 12 is installed in (each movable flexible rod 4 on the flexible rod by screw thread or other connecting mode, 5, be expressed as 124 respectively among sleeve Fig. 1 on 6,125,126), like this when each nut 13 meshes with leading screw, nut 13 leading screw 2 relatively floats, both initial angles are finally equated, avoid occurring stuck phenomenon, in addition, the underpart of each sleeve 12 also is provided with the chamfering 19 that play the guiding role, the angle of chamfering 19 should adapt with the angle of leading screw end-beveling 11, respectively save movable flexible rod 4 in order to make, 5,6 liftings are orderly, the nut on the movable flexible rod 4 of minor details, the stage casing of all the other nuts 13 is equipped with the clamp 15 of band thread, thread on thread on the clamp 15 and the nut 13 has continuity, clamp 15 links to each other with nut 13 by bearing pin 16, can bearing pin 16 be that rotate relative to nut 13 at the center, clamp 15 is stirred by the reed 17 that is installed on the sleeve 12, and the inwall of its next section telescopic bar is provided with and clamp position corresponding groove, when nut 13 and leading screw 2 are in engagement, clamp 15 is pressed on the leading screw 2 by reed 17, a part that is equivalent to nut 13, when nut 13 and leading screw 2 break away from engagement, when moving to the part of leading screw 2 no threads, clamp 15 is ejected by reed 17, be clamped in the groove of next section telescopic bar inwall, make the unlikely downslide of flexible rod of rise, since leading screw 2 when rotating except making the flexible rod lifting for 13 1 axial forces of nut, also can give torque of nut, flexible rod is rotated, and it is in case rotation just causes lifting out of control easily, therefore the utility model is provided with a guide rail 21 vertically at every section telescopic bar inwall, and on each sleeve 12, be provided with and guide rail 21 respective track 18, each section telescopic bar just no longer rotates relative to leading screw 2 like this.If more piece leading screw expansion device is in full reduced state as shown in Figure 1, when driver part 1 makes leading screw 2 rotations, leading screw 2 at first saves nut by the head that is engaged with and drives first section telescopic bar 6 risings, when first section telescopic bar 6 rises to the top, by the gland 9 of sleeve 126 on the first section telescopic bar 6 and second section telescopic bar, 5 ends second section telescopic bar 5 is mentioned a bit of distance again, the nut and the leading screw 2 of second section telescopic bar 5 are meshed fully, at this moment, first joint nut separates with leading screw 2, be clamped in the top of second section telescopic bar 5 simultaneously by the clamp 15 in nut stage casing, leading screw 2 continues rotation, driving second section telescopic bar 5 by the second joint nut rises, so analogize, rise to leading screw 2 tops until the movable flexible rod 4 of minor details, more piece leading screw expansion device is in height-rise state; When leading screw 2 counter-rotatings, 2 of leading screws at first by minor details nut drive the movable flexible rod 4 of minor details and on each section telescopic bar 5,6 descend, when its stroke near at the end, nut of a joint meshes with leading screw again on it, this section telescopic bar 5 is descended, when flexible rod 5 is reduced to the bottom, gland 8 on the flexible rod 5 is oppressed the sleeve 124 on the movable flexible rod 4 of minor details, nut and leading screw 2 on the movable flexible rod 4 of minor details are broken away from fully, the flexible rod 6 of a joint meshes with leading screw again on the flexible rod 5 simultaneously, so analogize, drop to leading screw 2 bottoms, so more piece leading screw expansion device is got back to full reduced state until first section telescopic bar 6.

Claims (5)

1, a kind of more piece leading screw expansion device, comprise the multi-joint telescoping bar [3 that can be nested successively from coarse to fine, 4,5,6], the gland [7 at every section telescopic bar top, 8,9,10] be positioned at flexible rod [3,4,5,6] Zhong Bu leading screw [2], and the driver part [1] that leading screw [2] is rotated, it is characterized in that: leading screw [2] lower end does not have thread, at the movable flexible rod [4 of every joint, 5,6] below be respectively equipped with can with the nut [13] of leading screw [2] engagement, and each nut [13] is by being set in its outside, be fixed in each movable flexible rod [4 respectively, 5,6] sleeve [124 on, 125,126] with each flexible rod [4,5,6] fuse.

2, more piece leading screw expansion device according to claim 1 is characterized in that: circumferentially linking to each other with sleeve [12] by key [14] of nut [13] axially then is pressed in it on sleeve [12] by the stage clip [20] of being located at nut [13] end.

3, more piece leading screw expansion device according to claim 1 and 2, it is characterized in that: the nut [13] on the movable flexible rod of minor details [4], the stage casing of all the other nuts [13] is equipped with the clamp [15] of band thread, thread on thread on the clamp [15] and the nut [13] has continuity, clamp [15] links to each other with nut [13] by bearing pin [16], can lock shaft [16] be that rotate relative to nut [13] at the center, clamp [15] is stirred by the reed [17] that is installed on the sleeve [12], and the inwall of its next section telescopic bar or gland is provided with and clamp [15] position corresponding groove.

4, more piece leading screw expansion device according to claim 1 and 2, it is characterized in that: the inwall of every section telescopic bar [3,4,5,6] is respectively equipped with guide rail [21] vertically, and each sleeve [124,125,126] is provided with and guide rail [21] respective track [18].

5, more piece leading screw expansion device according to claim 1 and 2, it is characterized in that: the upper end of leading screw [2] has chamfering [11], and the lower end of each sleeve [12] all also is provided with and the corresponding chamfering of leading screw [2] chamfer angle [19].

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