CN201528851U

CN201528851U - Multi-section vertical lifting mechanism

Info

Publication number: CN201528851U
Application number: CN2009201879256U
Authority: CN
Inventors: 张亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-07-21
Anticipated expiration: 2019-09-29

Abstract

The utility model relates to a multi-section vertical lifting mechanism which comprises a base (19) and a base shell (13), wherein the base (19) is provided with a worm (16) and a worm gear (15) which are matched with each other; the worm gear (15) is fixedly connected with an internal spline shaft (12) on the base; a spiral lifting mechanism is formed by the internal spline shaft (12), an outer nut (11) and a jacket (10) on the base shell (13); a secondary spiral lifting mechanism is formed by an inner nut (5), a screw rod (2) and a sleeve (6); the internal spline shaft (12) is internally provided with a spline sleeve (4) connected with the screw rod (2); and the multi-section vertical lifting mechanism is characterized in that the internal spline shaft (12) is connected with the spline sleeve (4) by a spline telescopic sleeve (8), the spline sleeve (4) is provided with internal and external threads, the spline sleeve (4) is internally connected with the screw rod (2) by screw threads, and the upper end of the screw rod (2) is fixedly connected with a top cover (1). The multi-section vertical lifting mechanism has the benefits that the self volume of the multi-section vertical lifting mechanism is reduced, the total stretching stroke is prolonged, the structure is simple, and the use is convenient.

Description

Multi-section vertical lifting mechanism

Technical field

The utility model relates to a kind of vertical lifting mechanism, especially a kind of multi-section vertical lifting mechanism that is used for furniture or desk and supporting leg.

Background technology

At present, the liftable mechanism that is used for furniture or desk and supporting leg on the market generally adopts spiral lifting mechanism or hydraulicefficiency elevation structure, spiral lifting mechanism is generally the three-section type vertical lifting mechanism, the three-section type vertical lifting mechanism comprises base, base is provided with the Worm and Worm Gear Driving device, and connected two-stage screw lowering or hoisting gear, being provided with guide pin bushing between the two-stage screw lowering or hoisting gear connects, the flexible stroke of three-section type vertical lifting mechanism is subjected to the restriction of auto levelizer itself, when increasing total kilometres, need aggrandizement apparatus itself, make device comparatively clumsy, be inconvenient to use.

The utility model content

The purpose of this utility model is exactly to be difficult for increasing in order to overcome existing three-section type vertical lifting mechanism total kilometres, and total kilometres are subjected to the defective of equipment mechanism restriction itself, and a kind of multi-section vertical lifting mechanism is provided, and this mechanism diminishes device itself, and total kilometres increase.

The technical scheme that its technical problem that solves the utility model adopts is:

Multi-section vertical lifting mechanism, comprise base and base shell, base is provided with worm screw and the worm gear that matches, worm gear is fixedlyed connected with the female splined shaft on the base, overcoat on female splined shaft and outer nut and the base shell constitutes spiral lifting mechanism, outer nut is provided with sleeve, be provided with inner nut in the sleeve, inner nut and screw rod and sleeve constitute the deuterostrophies elevating mechanism, being provided with spline housing in the female splined shaft is connected with screw rod, it is characterized in that: between female splined shaft and spline housing, be provided with the spline telescopic and be connected, in spline housing is provided with, external screw thread, and external screw thread is a reverse thread, spline housing is outer to be threaded with inner nut, is connected with screw flight in the spline housing, fixedlys connected with overhead guard on the screw rod, overhead guard with outside inner room be provided with telescopic and be connected.

Be provided with spline on the described telescopic, be provided with spline outward, be slidingly matched with overcoat and overhead guard respectively, under the driving of worm and wormwheel, retractable is done linear reciprocating motion.

Be respectively equipped with spline in described female splined shaft, the spline telescopic, be respectively equipped with spline outward, the fixedly connected hollow spline in spline housing lower end, they are slidingly matched by spline and spline between any two, and constitute the multiple coil vertical lifting mechanism with outer nut, inner nut, screw rod.

Described spline cooperatively interacts with spline, corresponding, can be at each part directly upwards evenly distribute spline and spline more than three or three.

Described spline housing external screw thread is a reverse thread, and the direction of rotation of screw thread is opposite with the screw thread rotation direction and the spline housing internal thread direction of rotation of female splined shaft.

On the basis of above-mentioned main technical schemes, can increase following further perfect technical scheme:

In the base shell, be provided with bearing block, a fixedly connected bearing on the bearing block, bearing and female splined shaft are connected.

On bearing block, be provided with the stroke guide rod, respectively be provided with a travel switch that matches with outer nut on the stroke guide rod of the both sides up and down of outer nut.

The beneficial effects of the utility model are that the multi-section vertical lifting mechanism own vol reduces, and always flexible stroke increases; Simple in structure, easy to use.

Below in conjunction with drawings and Examples the utility model is further specified.

Description of drawings:

Fig. 1 is a front view of the present utility model.

1. overhead guards among the figure, 2. screw rod, 3. telescopic, 4. spline housing, 5. inner nut, 6. sleeve, 7. telescopic, 8. spline telescopic, 9. travel switch, 10. overcoat, 11. outer nuts, 12. female splined shafts, 13. the base shell, 14. bearings, 15. worm gears, 16. worm screw, 17. bearings, 18. bearing blocks, 19. base, 20. stroke guide rods, 21. hollow splines.

The specific embodiment

As shown in Figure 1, the utility model multi-section vertical lifting device comprises base 19, base is connected with base shell 13 by bolt, on the base left-half, be provided with worm screw 16 devices, the base middle part is connected with female splined shaft 12 1 ends by bearing 17, the female splined shaft bottom is by the fixedly connected worm gear 15 of key, worm gear and worm engaging; The female splined shaft 12 outer screw threads that are provided with, in be provided with spline, female splined shaft is outer to be threaded with outer nut 11, in with spline telescopic 8 on spline be slidingly matched, outer nut 11 is provided with spline, spline in spline and the overcoat 10 is slidingly matched, overcoat 10 lower ends and base shell 13 are bolted to connection, on outer nut 11, be provided with sleeve 6, fixedly connected inner nut 5 in the sleeve, inner nut is connected with threaded engagement on the spline housing 4, spline housing 4 is slidingly matched by the hollow spline 21 of its lower end and the spline in the spline telescopic, be provided with inner bolt hole in the spline housing 4, spline housing 4 is connected with screw rod 2 by the inner bolt hole on it, fixedlys connected with overhead guard 1 by pin in screw rod 2 upper ends, be provided with two telescopics 3 at overhead guard 1 and 10 in overcoat, 7 connect, and they are slidingly matched by spline on it and spline between any two.

As shown in Figure 1, in base shell 13, be provided with bearing block 18, the fixedly connected bearing 14 of bearing block, bearing and female splined shaft 12 middle and lower parts are connected, and can make female splined shaft more stable in transmission process.

As shown in Figure 1, on bearing block 18, be provided with stroke guide rod 20, respectively be provided with a travel switch that matches with outer nut 9 on the stroke guide rod 20 of the both sides up and down of outer nut 11, can prevent to exceed stroke, but and limiting overload.

The operation principle of the utility model multi-section vertical lifting device is: under the driving of alternating current generator, worm screw 16 worm gears 15 transmission devices will drive female splined shaft 12 and rotate, at this moment, female splined shaft 12 will make the outer nut 11 in the spiral lifting mechanism that female splined shaft 12 and outer nut 11 and overcoat 10 constitute move up along the splines in the overcoat 10, female splined shaft 12 rotates in the same way by spline telescopic 8 driving spline housings 4 simultaneously, and because the external thread rotary veer of spline housing is opposite with the screw thread rotation direction of female splined shaft, female splined shaft 12 will make spline housing 4 relative fixed sleeve 6 and the inner nut 5 on outer nut 11 in rotation in the deuterostrophies elevating mechanism that sleeve 6 and inner nut 5 and spline housing 4 constitute move up, the rate of climb that makes spline housing 4 is relatively faster than inner nut, sleeve, the rate of climb of the fixed structure that outer nut constitutes, make spline housing 4 drive 8 elongations of spline telescopic, simultaneously, because screw rod 2 is fixedlyed connected with overhead guard 1, overhead guard and telescopic 3 are slidingly matched by spline on it and spline, so screw rod 2 non-rotatable moving up and down, when female splined shaft 12 drives spline housing 4 rotation risings, spline housing 4 relatively rotates with screw rod 2, spline housing 4 will make the screw rod 2 in three grades of spiral lifting mechanisms that spline housing and screw rod and overhead guard constitute move up, constitute multi-section vertical lifting mechanism, the total kilometres of the utility model multi-section vertical lifting structure are increased, but volume own reduce.

Claims

1. multi-section vertical lifting mechanism, comprise base (19) and base shell (13), base (19) is provided with worm screw (16) and the worm gear (15) that matches, worm gear (15) is fixedlyed connected with the female splined shaft (12) on the base, overcoat (10) on female splined shaft (12) and outer nut (11) and the base shell (13) constitutes spiral lifting mechanism, outer nut (11) is provided with sleeve (6), be provided with inner nut (5) in the sleeve, inner nut and screw rod (2) and sleeve (6) constitute the deuterostrophies elevating mechanism, being provided with spline housing (4) in the female splined shaft (12) is connected with screw rod (2), it is characterized in that: between female splined shaft (12) and spline housing (4), be provided with spline telescopic (8) and be connected, in spline housing (4) is provided with, external screw thread, and external screw thread is a reverse thread, spline housing (4) is outer to be threaded with inner nut (5), in be threaded with screw rod (2), fixedlying connected with overhead guard (1) in screw rod (2) upper end, is provided with telescopic (3) between overhead guard and overcoat (10), (7) connect.

2. multi-section vertical lifting mechanism according to claim 1 is characterized in that: in base shell (13), be provided with bearing block (18), and the fixedly connected bearing of bearing block (14), bearing and female splined shaft (12) are connected.

3. multi-section vertical lifting mechanism according to claim 2, it is characterized in that: on bearing block (18), be provided with stroke guide rod (20), respectively be provided with a travel switch that matches with outer nut (9) on the stroke guide rod (20) of the both sides up and down of outer nut (11).