CN201236569Y

CN201236569Y - Electric telescoping tube

Info

Publication number: CN201236569Y
Application number: CNU2008203017235U
Authority: CN
Inventors: 蔡逢春
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-05
Filing date: 2008-08-05
Publication date: 2009-05-13
Anticipated expiration: 2018-08-05

Abstract

An electric telescopic pipe comprises a back end seat and a body screwed with the back end seat. The body is connected with a fixed link, a telescopic link, and a front end through a connecting ring; a driving unit is arranged in the body and connected with a screw rod; a nut is arranged at one end of the telescopic pipe and screwed with the screw rod; a plurality of positioning devices are arranged on the nut; the positioning device comprises at least a spring component and at least a rolling ball which is arranged between the spring component and the fixed link; the telescopic pipe can move outwards and inwards when the driving unit drives the screw rod to rotate. The arrangement of the positioning devices arranged on the nut enables the friction between the telescopic link and the fixed link to be minimized when the positioning devices move along with the telescopic link; and the spring component can push the rolling ball into abutting against the inner wall of the fixed link so that the balls can bear the equal stress and move stably. At the same time, the driving unit can utilize the minimum pushing force to achieve the pushing purpose because the friction can be minimized.

Description

The electric expansion pipe

Technical field

The utility model relates to a kind of electric expansion pipe.

Background technology

See also Fig. 1 and shown in Figure 2, it is the electric expansion pipe 90 of existing market main flow, it is mainly used in the switching of assisting window, and it is to utilize a motor 91 to drive a screw rod 94 in conjunction with a gear train 96 to rotate, again, one fixed bar 92 is incorporated on this gear train 96, one end of one stretch 93 is provided with a nut 95, and this screw rod 94 screws togather with this nut 95, when screw rod 94 rotates, this nut 95 promptly can be advanced according to the rotation direction of screw rod 94, and then drives this stretch 93 and move; In addition, be provided with projection 951, make this stretch 93 by this when mobile, can not rock, keep its stability in the outer rim of this nut 95.

Yet, above-mentioned electric expansion pipe 90, cording has following shortcoming:

1. this stretch 93 is when mobile, the projection 951 on this nut 95 can and the interior wall friction of this fixed bar 92, and then produce noise, and because its frictional force can weaken the strength that motor passes out.

2. because this motor 91 is parallel with the direction of screw rod 94, therefore needs to see through a large amount of gear trains and come transferring power, in this process, will slacken the strength that it passed out again.

Because the employed window thickness in building is big now, its weight also just improves relatively, in order to promote just to use the more motor of high thrust, on cost, has also just relatively improved.

The utility model content

Technical problem to be solved in the utility model is, at the deficiencies in the prior art, provides a kind of electric expansion pipe, and its main purpose is to reduce the generation of noise, and then promotes thrust, improves usefulness, and the cost of driver element is reduced.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of electric expansion pipe, and it comprises:

One rear end seat;

One body is a hollow tube, and one end and this rear end seat screw togather mutually;

One driver element places in this body;

One adapter ring screws togather mutually with holding in addition of this body;

At least two pads place the two ends of this adapter ring respectively;

One thrust bearing places in this adapter ring;

One ball bearing places in this adapter ring, and utilizes a spacer ring and this thrust bearing closing;

After one screw rod, one end pass this ball bearing and this thrust bearing, be connected with this driver element;

One fixed bar is a hollow tube, and the one end is bolted in this body;

One expansion link is a hollow tube, and the one end is provided with a nut, and above-mentioned screw rod system and this nut screw togather mutually;

One front end seat is the end in addition that is screwed together in this expansion link, in order to combine with other article;

Several positioners are located on this nut, and when reducing this telescoping tube by this and advancing and the friction of this fixed bar, described positioner comprises at least one elastic parts and at least one ball, and this ball places between this elastic parts and this fixed bar;

When this driver element drove this screw rod rotation, this telescoping tube promptly can outwards or inwardly be advanced.

Compared with prior art, the beneficial effects of the utility model are: the utility model is provided with several positioners on nut, when reducing this telescoping tube by this and advancing and the friction of this fixed bar, described positioner comprises at least one elastic parts and at least one ball, by the slick and sly body of ball, make it when moving with expansion link, to reduce to minimum with the frictional force of fixed bar, simultaneously, utilize elastic parts to promote the inwall that each ball is close proximity to this fixed bar, can make the mean forced of each ball, reach the stable purpose of advancing, simultaneously, because its frictional force reduces, so driver element can use the purpose that reaches promotion than low thrust.

Moreover the two ends that the utility model lies in adapter ring are provided with two pads, reach by this to reduce the noise purpose.

Again, the utility model is an end that driver element is placed this screw rod, reduces the quantity of gear train by this, can reduce thrust disappearing in transmittance process, improves usefulness; And volume of the present utility model significantly reduces, can be as known because of motor does not place other side, and occupy more space.

For making the juror further understanding can be arranged, so it is as follows to disclose a better embodiment to the utility model.Cooperate graphic, figure number, with the utility model constitution content and the effect reached describes in detail as the back:

Description of drawings

Fig. 1 and Fig. 2 are the sectional drawing of known technology;

Fig. 3 is the stereogram that the utility model is implemented state;

Fig. 4 is the utility model exploded view;

Fig. 5 and Fig. 6 are the sectional drawing after the utility model embodiment stretches.

Label declaration

10 ... the electric expansion tubular structure

101 ... the end seat

102 ... the front end seat

11 ... body

12 ... driver element

121 ... gear train

122 ... motor

13 ... adapter ring

14 ... pad

15 ... thrust bearing

16 ... ball bearing

161 ... spacer ring

17 ... screw rod

18 ... fixed bar

19 ... expansion link

191 ... nut

20 ... positioner

21 ... elastic parts

22 ... ball

90 ... telescoping tube

91 ... motor

96 ... gear train

93 ... stretch

94 ... screw rod

95 ... nut

951 ... projection

The specific embodiment

See also Fig. 3 and Fig. 4 and cooperate Fig. 5 and shown in Figure 6, the utility model electric expansion tubular structure 10 is to comprise a rear end seat 101, a body 11, a driver element 12, an adapter ring 13, at least two pads 14, a thrust bearing 15, a ball bearing 16, a screw rod 17, a fixed bar 18, an expansion link 19, a front end seat 102 and several positioners 20; Wherein, this body 11 is a hollow tube, and an end of described body 11 and this rear end seat 101 screw togather mutually, carry out secure bond by this rearward end 101 and other article; This driver element 12 is to place in this body 11; This adapter ring 13 is to screw togather mutually with holding in addition of this body 11, can simultaneously this driver element 12 be fixed in this body 11; This two pad 14 places the two ends of this adapter ring 13 respectively, can reduce the noise that is sent when rotating by this, and wherein, described pad 14 can be the rubber material or other rubber-like material is formed, to have the better sound-absorbing and the effect of damping; This thrust bearing 15 places in this adapter ring 13, and this ball bearing 16 is also to place in this adapter ring 13, and, utilize a spacer ring 161 and these thrust bearing 15 closings; After one end of this screw rod 17 passes this ball bearing 16 and this thrust bearing 15, be connected, rotate so this driver element 12 can directly drive this screw rod 17 with this driver element 12; This fixed bar 18 is a hollow tube, and one end system is bolted in this body 11; This expansion link 19 also is a hollow tube, and the one end is provided with a nut 191, and above-mentioned screw rod 17 is to screw togather mutually with this nut 191, and when this screw rod 17 rotated, this nut 191 was to advance with respect to this screw rod 17; This front end seat 102 is the end in addition that is screwed together in this expansion link 19, in order to combine with other article; Wherein, each positioner 20 is to be located on this nut 191, when reducing this telescoping tube 19 by this and advancing, the friction of this nut 191 and this fixed bar 18, described positioner 20 is to comprise at least one elastic parts 21 and at least one ball 22, and this ball 22 is to place between this elastic parts 21 and this fixed bar 18; Please cooperate Fig. 5 and shown in Figure 6, by the electric expansion pipe 10 that above-mentioned each assembly is formed, can drive this screw rod 17 rotations with the running of this driver element 12, the telescoping tube 19 in this electric expansion pipe 10 promptly can outwards or inwardly be advanced.

Wherein, this positioner 20 is to be embedded on this nut 191, and makes these ball 22 part outer rims protrude from the surface of this nut 191, and can touch with the inwall of this fixed bar 18 to; By this, make that each positioner 20 is stressed even, so this expansion link 19 is stablized smooth and easy advancing.Again, utilize ball 22 smooth surfaces, make this expansion link 19 when advancing, reduce the friction of this nut 191 and these fixed bar 18 inwalls, reduce resistance.

Wherein, this elastic parts 21 can be assemblies such as spring, all can reach the stressed purpose of uniform distribution.In present embodiment, be to utilize four positioners 20 on average to put.

Again, driver element 12 of the present utility model is to comprise at least one motor 122 and at least one gear train 121, produces this screw rod 17 of power drive by this and rotates.

Claims

[claim 1] a kind of electric expansion pipe is characterized in that comprising:

One rear end seat;

One body is a hollow tube, and one end and this rear end seat screw togather mutually;

One driver element places in this body;

One adapter ring screws togather mutually with holding in addition of this body;

At least two pads place the two ends of this adapter ring respectively;

One thrust bearing places in this adapter ring;

One ball bearing places in this adapter ring, and utilizes a spacer ring and this thrust bearing closing;

After one screw rod, one end pass this ball bearing and this thrust bearing, be connected with this driver element;

One fixed bar is a hollow tube, and the one end is bolted in this body;

One expansion link is a hollow tube, and the one end is provided with a nut, and above-mentioned screw rod and this nut screw togather mutually;

One front end seat is the end in addition that is screwed together in this expansion link, in order to combine with other article;

Several positioners are located on this nut, and when reducing this telescoping tube by this and advancing and the friction of this fixed bar, described positioner comprises at least one elastic parts and at least one ball, and this ball places between this elastic parts and this fixed bar;

When this driver element drove this screw rod rotation, this telescoping tube promptly can outwards or inwardly be advanced.
[claim 2] electric expansion pipe according to claim 1 is characterized in that this positioner is embedded on this nut, makes this ball part outer rim protrude from this nut.
[claim 3] electric expansion pipe according to claim 2 is characterized in that this elastic parts is a spring.
[claim 4] is characterized in that according to claim 1 or 2 or 3 described electric expansion pipes this driver element comprises at least one motor and at least one gear train.
[claim 5] electric expansion pipe according to claim 4 is characterized in that this positioner has four at least.
[claim 6] electric expansion pipe according to claim 1 is characterized in that this pad is the rubber material.