CN104405846A

CN104405846A - Novel mechanical telescopic device

Info

Publication number: CN104405846A
Application number: CN201410622925.XA
Authority: CN
Inventors: 曹成; 王慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-08
Filing date: 2014-11-08
Publication date: 2015-03-11

Abstract

The invention relates to a novel mechanical telescopic device capable of coaxially stretching. The novel mechanical telescopic device is small in size, simple in structure, flexible to stretch and capable of adjusting the stretching distance. The novel mechanical telescopic device mainly consists of a driving shaft, a connecting rod, a rolling wheel, a slide-way tube and a telescopic shaft, wherein the connecting rod is fixed on the driving shaft, the rolling wheel is connected to the end part of the connecting rod through a screw rod, the rolling wheel is limited in a skew annular slide-way on the slide-way tube, the connecting rod and the rolling wheel on the connecting rod are driven by the driving shaft to make circumferential movement while the slide-way tube which is fixed on the telescopic shaft also can be pushed by the rolling wheel to make reciprocating telescopic movement, i.e. the telescopic shaft also can make the reciprocating telescopic movement.

Description

A kind of novel mechanical expansion device

Technical field

The present invention relates to a kind of coaxial flexible device, volume is little, and structure is simple, capable of expansion and contraction, and can regulate flexible stroke.

Background technique

At present, common mechanical telescopic device adopts bent axle drivening rod to promote to stretch, general volume is relatively large, and structure relative complex, relate to gear, transmission shaft, bent axle, also has connecting rod, eccentric motion is made due to during crankshaft rotating, add the burden of left and right sides bearing, easily cause bearing wear, connecting rod also swings up and down with bent axle while the back and forth movement of left and right in addition, so telescopic shaft also can be subject to obliquely while flexible or the tractive force effect in direction obliquely, so also can increase the friction between telescopic shaft and oil sealing.

Summary of the invention

The invention provides a kind of novel mechanical telescopic device to improve above drawback, this device energy coaxial rotating, compact, does not need gear transmission, simplifies the structure, and effectively can eliminate disalignment and to move the wearing and tearing caused.

The technical solution adopted for the present invention to solve the technical problems is: this device is primarily of driving shaft, connecting rod, scroll wheel, slideway cylinder, telescopic shaft is formed, connecting rod is fixed on driving shaft, scroll wheel is connected to interlinking lever end by screw rod, scroll wheel is limited in again in the oblique annular slide track on slideway cylinder, under the drive of driving shaft, scroll wheel on connecting rod and end thereof moves in a circle together in the plane in vertical driving shaft axle center, scroll wheel also will move along annular slide track simultaneously, the plane of scroll wheel motion and the plane at annular slide track place are the spatial relations of oblique, so scroll wheel can be with sliding way cylinder back and forth movement, slideway cylinder is fixed on telescopic shaft, slideway cylinder also can drive telescopic shaft to come and go fore and aft motion along telescopic chute.

The invention has the beneficial effects as follows, can complete flexible while, simplify the structure of conventional mechanical expansion device, reduce volume, make structure more dexterous, improve economic benefit.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further described.

Fig. 1 is each component structural figure of the present invention.

Fig. 2 is overall structure figure of the present invention.

Fig. 3 is the detail structure chart that scroll wheel is connected with connecting rod.

Fig. 4 is oblique annular slide track tectonic maps.

Fig. 5 is the detail structure chart that scroll wheel moves in oblique annular slide track.

1. driving shafts, 2. connecting rod, 3. scroll wheel, 4. screw rod in figure, 5. slideway cylinder, 6. oblique annular slide track, 7. telescopic chute, 8. telescopic shaft, 9. draw-in groove, 10. draw-in groove, 11. locating studs, 12. locating studs, 13. pads, 14. pads, 15. nuts, 16. nuts.

Embodiment

In FIG, by pad 13 and nut 15, connecting rod 2 is fixed on driving shaft 1, by screw rod 4, the end of scroll wheel 3 with connecting rod 2 is connected, by pad 14 and nut 16, slideway cylinder 5 is fixed on telescopic shaft 8, the erection sequence of this part first the right half of slideway cylinder 5 is nested on telescopic shaft 8, again the scroll wheel 3 be connected with connecting rod 2 is fit in the half of annular slide track of slideway cylinder 5 right half, and then the left half of slideway cylinder 5 is nested on telescopic shaft 8, finally fix a whole set of slideway cylinder 5 with pad 14 and nut 16, such scroll wheel 3 has also just been limited in the oblique annular slide track on slideway cylinder 5, telescopic shaft 8 there is the draw-in groove 9 and 10 that two symmetrical, locating stud 11 and 12 is embedded in draw-in groove 9 and 10, then the draw-in groove 9 and 10 of related for telescopic shaft 8 embedding is pushed the conduit of telescopic chute 7, namely whole like this expansion device has been assembled.

Driving shaft 1 drive lower link 2 and on scroll wheel 3 move in a circle in the plane in vertical driving shaft 1 axle center together, the scroll wheel 3 of connecting rod 2 end is limited in the oblique annular slide track 6 of slideway cylinder 5, scroll wheel 3 also will move along annular slide track while moving in a circle in the plane in vertical driving shaft 1 axle center, the plane at the plane that scroll wheel 3 moves and annular slide track place is the spatial relation of oblique, so scroll wheel 3 can be with sliding way cylinder 5 side-to-side movement, slideway cylinder 5 is fixed on telescopic shaft 8, slideway cylinder 5 also can drive telescopic shaft 8 to stretch along telescopic chute about 7.

The plane at oblique annular slide track place on slideway cylinder 5 and the angle of cut β in the axle center of telescopic shaft 8 should get 25o-30o, if the radius of slideway cylinder 5 is R, the skid depth of annular slide track is a, the distance L=(2R-a/2-a/2 that then telescopic shaft 8 is flexible) * tan β, by regulating connecting rod 2, change the radius that itself and scroll wheel 3 move in a circle, and the slideway cylinder 5 changing different radii can change the flexible stroke of telescopic shaft 8.

Claims

1. a novel mechanical expansion device, driving shaft 1 drive lower link 2 and on scroll wheel 3 move in a circle in the plane in vertical driving shaft 1 axle center together, the scroll wheel 3 of connecting rod 2 end is limited in again in the oblique annular slide track 6 of slideway cylinder 5, scroll wheel 3 also will move along annular slide track 6 while moving in a circle in the plane in vertical driving shaft 1 axle center, the plane at the plane that scroll wheel 3 moves and oblique annular slide track 6 place is the spatial relation of oblique, so scroll wheel 3 can be with sliding way cylinder 5 back and forth movement, slideway cylinder 5 is fixed on telescopic shaft 8, slideway cylinder 5 also can drive telescopic shaft 8 to come and go fore and aft motion along telescopic chute 7.

2. the expansion device according to 1, scroll wheel 3 is in spherical shape, oblique annular slide track 6 inwall is arc-shaped, such oblique annular slide track 6 can limit scroll wheel 3, also can rotate around screw rod 4 when scroll wheel 3 is limited in motion in annular slide track 6 simultaneously, this all efficiently reduces the friction between scroll wheel 3 and oblique annular slide track 6.

3. the expansion device according to 1, the plane at oblique annular slide track 6 place on slideway cylinder 5 and the angle of cut β of the shaft axis of telescopic shaft 8 should get 25o-30o, if the radius of slideway cylinder 5 is R, the skid depth of annular slide track 6 is a, the distance L=(2R-a/2-a/2 that then telescopic shaft is flexible) * tan β, by regulating connecting rod 2, change the radius that itself and scroll wheel 3 move in a circle, and the slideway cylinder 5 changing different radii can change the flexible stroke of telescopic shaft 8.