CN106678139B - A kind of electric telescopic pipe - Google Patents
A kind of electric telescopic pipe Download PDFInfo
- Publication number
- CN106678139B CN106678139B CN201710073657.4A CN201710073657A CN106678139B CN 106678139 B CN106678139 B CN 106678139B CN 201710073657 A CN201710073657 A CN 201710073657A CN 106678139 B CN106678139 B CN 106678139B
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- Prior art keywords
- middle pipe
- outer tube
- screw rod
- fixed frame
- rear slider
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- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 10
- 230000003028 elevating effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 18
- 238000009434 installation Methods 0.000 description 15
- 230000033001 locomotion Effects 0.000 description 9
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 208000032369 Primary transmission Diseases 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000004308 accommodation Effects 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 5
- 239000002783 friction material Substances 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 208000012271 tenesmus Diseases 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/10—Telescoping systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/204—Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2046—Screw mechanisms with gears arranged perpendicular to screw shaft axis, e.g. helical gears engaging tangentially the screw shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2059—Superposing movement by two screws, e.g. with opposite thread direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of electric telescopic pipes, belong to motor field, solve the problems, such as that prior art axial direction load-bearing capacity is poor, the technical solution for solving the problems, such as this mainly includes inner tube, middle pipe and outer tube, in the front end insertion of inner tube in pipe, in the front end insertion outer tube of middle pipe, the front end of the outer tube is equipped with driving device, the first linkage unit is equipped in the middle pipe, first linkage unit includes intermeshing first screw rod and the first nut, the front end of first screw rod is connect with driving device, first nut is fixedly connected with middle pipe, the second linkage unit is equipped in said inner tube, second linkage unit includes intermeshing second screw rod and the second nut, second screw rod and the first screw rod rotate synchronously, the relatively middle pipe axially position of second screw rod, second nut is fixedly connected with inner tube.Present invention is mainly used for axial reciprocating drivings, especially elevating mechanism.
Description
Technical field
The present invention relates to electric telescopic pipe, it is especially a kind of with inner tube, middle pipe, outer tube three section electric telescoping tubes.
Background technique
General electric telescopic pipe or Telescopic rod structure with three-joint pipe body, in the rear end insertion of inner tube in pipe, middle pipe
Rear end insertion outer tube in, the driving motor that is then arranged in outer tube drives screw rod rotation, and screw rod is equipped with nut, nut with
Inner tube is fixedly connected, and inner tube pipe can not rotate in, therefore nut can not follow screw rod to rotate, and transport along the axial direction of screw rod
It is dynamic, thus drive inner tube flexible, such as when electric telescopic pipe elongation, inner tube is first moved, after relatively middle pipe reaches certain size,
It will drive middle pipe to continue to stretch, after middle pipe also stretches out nominal length, driving motor stops working, and electric telescopic pipe is shunk
When, driving motor drives screw rod, is axially moved nut-screw, drives inner tube to retract, when inner tube is retracted to the setting position of middle pipe
It sets, middle pipe starts to retract, and until middle pipe is retracted into the setting position of outer tube, driving motor stops working.It can be seen that whether extending
Or shorten, the electric telescopic pipe of this structure is all that inner tube first moves and can just make middle pipe setting in motion in place, once nut with
Screw rod generates loosening, will lead to inner tube and middle pipe loosens together, so in terms of the stability of transmission and reliability of structure all
It is not very well, axial load-bearing capacity is poor.
Summary of the invention
Present invention purpose to be achieved is just to provide a kind of electric telescopic pipe that axial load-bearing capacity is strong.
In order to achieve the above object, the present invention adopts the following technical scheme that：A kind of electric telescopic pipe, including inner tube, middle pipe
And outer tube, in the front end insertion of inner tube in pipe, in the front end insertion outer tube of middle pipe, the front end of the outer tube is equipped with driving device,
It is equipped with the first linkage unit in the middle pipe, the first linkage unit includes intermeshing first screw rod and the first nut, and first
The front end of screw rod is connect with driving device, and the first nut is fixedly connected with middle pipe, and the second linkage unit is equipped in said inner tube, the
Two linkage units include intermeshing second screw rod and the second nut, and the second screw rod and the first screw rod rotate synchronously, the second spiral shell
The relatively middle pipe axially position of bar, the second nut are fixedly connected with inner tube.
Further, the middle pipe is connected with connector, and the front end of connector is fixed on the front end of middle pipe, and the first nut is solid
It is scheduled on the rear end of connector, when the telescoping tube is in contraction state, the rear end of connector is protruded into inner tube.
Further, second screw rod has inner hole, and the rear end of the first screw rod is inserted into the inner hole of the second screw rod, and first
The fixed finite place piece in the rear end of screw rod, locating part and inner hole the second screw rod of circumferentially positioned realization of the second screw rod and the first screw rod are same
Step rotation, locating part follow the first screw rod to be axially moved along the inner hole of the second screw rod, and the outer diameter of locating part front end is greater than the first spiral shell
Female internal diameter.
Further, second screw rod realizes that pipe is axially fixed in relatively by connection bearing and the first nut assembly connection
The rear end face of position, the first nut is equipped with annular groove, and the front end of the second screw rod is protruded into annular groove, and the inner hole sleeve of the second screw rod is in ring
On the interior ring-side wall of shape slot, the outer ring side wall of the outer ring and annular groove that connect bearing is interference fitted, and connects the inner ring and the of bearing
The outer circumference surface of two screw front ends is interference fitted, and the outer ring side wall of annular groove, which is equipped with, carries out axially the front end of connection bearing outer ring
The positioning step of positioning, the rear end for connecting bearing outer ring, which is against on connector, to be positioned, and the front end of the second screw rod passes through connection bearing
And it is equipped with the shaft block ring that axially position is carried out to the front end of connection bearing inner race, the front end of the second screw rod is equipped with to connection bearing
The rear end of inner ring carries out the screw rod shaft shoulder of axially position.
Further, the driving device includes driving motor and reduction gearbox, and reduction gearbox includes deceleration box, transmission mechanism
And output shaft, the motor shaft of the driving motor have worm structure, the transmission mechanism includes primary transmission component and second level
Transmission component, primary transmission component and secondary drive assembly are equipped with two groups, and primary transmission component includes coaxial and rotates synchronously
First-stage worm gear and level-one worm screw, the worm structure engaged transmission of first-stage worm gear and motor shaft, secondary drive assembly includes coaxial
And the second-stage worm gear and secondary gear rotated synchronously, second-stage worm gear and level-one worm screw engaged transmission, output shaft is equipped with and second level
The driven gear of gear engaged transmission, output shaft are connect with the first screw rod.
Further, the rear end of the deceleration box inner sidewall is equipped with bearing block, and output shaft is mounted on by exporting bearing
On bearing block, bearing base rear end is equipped with the end cap of positioning output shaft, and the rear end of output shaft is equipped with shaft coupling mounting hole, shaft coupling peace
It fills and is equipped with shaft coupling in hole, the front end of the first screw rod passes through end cap and connect with shaft coupling, and end cap is equipped with and the first screw front end
The screw-bearing of assembly, the rear end of end cap are equipped with the cover board for positioning screw-bearing.
Further, the front end of the driving motor is equipped with threaded hole, stay bolt is housed on cover board, stay bolt sequentially passes through
It is connect after cover board, end cap, bearing block, deceleration box with threaded hole, by cover board, end cap, bearing block, deceleration box and driving motor
It is fixed as one.
Further, it is equipped between the middle pipe and outer tube and manages first of the sliding-frictional resistance between outer tube in reducing
Sliding friction component is equipped with the second sliding friction for reducing the sliding-frictional resistance between inner tube and middle pipe between inner tube and middle pipe
Component.
Further, the first sliding friction component includes in being set to the first rear slider component of outer tube back-end and being set to
The first of pipe is advancing slip block assembly, the first advancing slip block assembly are located at the front of the first rear slider component, and the first rear slider component includes
First fixed frame and the first rear slider, the lateral wall of the first fixed frame and the inner sidewall of outer tube cooperate, the first rear slider card
Button is connected on the inner sidewall of the first fixed frame, and the first rear slider has Elastic buckle, and the outer tube is equipped with block button hole, the
The Elastic buckle of one rear slider passes through the first fixed frame and the first fixed frame is fixed in the block button hole cooperation of outer tube, after first
The inner sidewall of sliding block is bonded friction with the lateral wall of middle pipe, and the first advancing slip block assembly includes first be fixed on middle pipe lateral wall
Front-slider, the lateral wall of the first front-slider are bonded friction with the inner sidewall of outer tube.
Further, the second sliding friction component includes set on the second rear slider component of middle pipe rear end and set on interior
The second of pipe is advancing slip block assembly, the second advancing slip block assembly are located at the front of the second rear slider component, and the second rear slider component includes
The inner sidewall of second fixed frame and the second rear slider, the lateral wall of the second fixed frame and middle pipe cooperates, the second rear slider card
Button is connected on the inner sidewall of the second fixed frame, and the second rear slider has Elastic buckle, and the middle pipe is equipped with block button hole, the
The Elastic buckle of two rear sliders passes through the second fixed frame and the second fixed frame is fixed in the block button hole cooperation of middle pipe, after second
The inner sidewall of sliding block is bonded friction with the lateral wall of inner tube, and the second advancing slip block assembly includes second be fixed on inner tube lateral wall
Front-slider, the lateral wall of the second front-slider are bonded friction with the inner sidewall of outer tube, and the second front-slider, which protrudes into, forms bolt in inner tube
Second nut is fixed.
After adopting the above technical scheme, the invention has the advantages that：Inner tube, the tube and the outer tube are relatively unrotatable
, it can only move to axial, since the first nut is fixedly connected with middle pipe, so the first nut can not rotate, driving motor
Starting will drive the first screw rod after rotating forward and rotate relative to the first nut, therefore the first screw rod is moved up with respect to the first nut, outside
Pipe can follow the first screw rod to move up, so that pipe moves up in realizing outer tube relatively；Meanwhile second screw rod follow the first spiral shell
Bar rotation, the second nut be it is fixed, so the second screw rod can opposite second nut move up, middle pipe follows the second spiral shell
Bar moves up, and moves up to manage opposite inner tube in realizing.When electric telescopic pipe is shunk, driving motor reversion,
It is that outer tube and middle pipe move synchronously.As it can be seen that respectively driven by the realization of driving motor to outer tube and middle pipe, reliability and
Stability is all very good, and outer tube and middle pipe move synchronously, and outer tube is double with respect to the movement speed of inner tube, so that elongation or receipts
The time of compression process greatly shortens, and screw rod and nut cooperate, and has self-locking effect, and is two pairs of screw rods, nut engaging structures,
With double self locking, the axial load-bearing capacity of electric telescopic pipe, which is mentioned, to be greatly improved.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings：
Fig. 1 is the structural schematic diagram of an embodiment of the present invention；
Fig. 2 is enlarged view at I in Fig. 1；
Fig. 3 is enlarged view at II in Fig. 1；
Fig. 4 is the explosive view of driving device；
Fig. 5 is the cross-sectional view of driving device；
Fig. 6 is enlarged drawing at III in Fig. 1；
Fig. 7 is the schematic diagram of the first sliding friction component and outer tube；
Fig. 8 is the cross-sectional view of the first sliding friction component；
Fig. 9 is enlarged drawing at IV in Fig. 8；
Figure 10 is the schematic diagram of the first fixed frame；
Figure 11 is the bottom view of the first sliding friction component.
Specific embodiment
It is as shown in Figure 1 an embodiment of the present invention, a kind of electric telescopic pipe, including inner tube 1, middle pipe 2 and outer tube 3, it is interior
In the front end insertion of pipe 1 in pipe 2, in the front end insertion outer tube 3 of middle pipe 2, the front end of the outer tube 3 is equipped with driving device, described
It is equipped with the first linkage unit in middle pipe 2, the first linkage unit includes intermeshing first screw rod 21 and the first nut 22, and first
The front end of screw rod 21 is connect with driving device, and the first nut 22 is fixedly connected with middle pipe 2, and the second linkage is equipped in said inner tube 1
Component, the second linkage unit include intermeshing second screw rod 11 and the second nut 12, the second screw rod 11 and the first screw rod 21
It rotates synchronously, the second screw rod 11 2 axially position of middle pipe, the second nut 12 relatively are fixedly connected with inner tube 1.
The front and back position being related on all components in the present invention other than driving device, from the point of view of Fig. 1, " preceding "
That is the "upper" in Fig. 1, the "lower" in " rear " i.e. Fig. 1.Only driving device is the motor using the stretching direction of motor shaft as reference
Axis is stretched out from the front end of driving motor, and what is showed in Fig. 1 is exactly to extend downwardly driving motor.For the ease of in conjunction with attached drawing
Understand the present invention, other than being related to driving device, other that " preceding " is just replaced with "upper", " rear " is replaced in "lower".In addition, any
The definition of " inside and outside " that is related on components is using the central axis of electric telescopic pipe as reference, in electric telescopic pipe
Mandrel line is then "inner", opposite, the central axis far from electric telescopic pipe is then "outside".
First, it is assumed that the lower end of inner tube 1 is securing, for example fix on the ground, electric telescopic pipe is first in contraction
State, in elongation process, the opposite inner tube 1 of middle pipe 2 is moved up, and the relatively middle pipe 2 of outer tube 3 moves up.In the present embodiment,
The cross-sectional shape of inner tube 1, middle pipe 2 and outer tube 3 is hexagon, can be described behind specific structure, inner tube 1, middle pipe 2 and outer tube
3 be it is relatively unrotatable, can only move to axial, since the first nut 22 is fixedly connected with middle pipe 2, so the first nut
22 can not rotate, and the starting of driving motor 4 will drive the first screw rod 21 after rotating forward and rotate relative to the first nut 22, therefore the first screw rod
21 opposite first nuts 22 move up, and outer tube 3 can follow the first screw rod 21 to move up, thus pipe 2 in realizing outer tube 3 relatively
It moves up；Meanwhile second screw rod 11 follow the first screw rod 21 rotate, the second nut 12 be it is fixed, so the second spiral shell
Opposite second nut 12 of the meeting of bar 11 moves up, and middle pipe 2 follows the second screw rod 11 to move up, so that pipe 2 is relatively interior in realizing
Pipe 1 moves up.When electric telescopic pipe is shunk, the reversion of driving motor 4 and outer tube 3 and middle pipe 2 are moved synchronously.As it can be seen that
Respectively driving to outer tube 3 and middle pipe 2 is realized by driving motor 4, and reliability and stability are all very good, and outer tube
3 and middle pipe 2 move synchronously, outer tube 3 is double with respect to the movement speed of inner tube 1, so that elongation or time of contraction process contract significantly
Short, screw rod and nut cooperate, and have self-locking effect, and are two pairs of screw rods, nut engaging structures, have double self locking, electronic
The axial load-bearing capacity of telescoping tube, which is mentioned, to be greatly improved.
In order to which length that entire length when electric telescopic pipe being made to be in contraction state does not exceed outer tube 3 is too many, make electricity
The overall structure of dynamic telescoping tube is more compact.In the present embodiment, the middle pipe 2 is connected with connector 23, connector 23 it is upper
End is fixed on the upper end of middle pipe 2, and the first nut 22 is fixed on the lower end of connector 23, and connector 23 includes linking arm 231 and connects
Disk 232 is connect, linking arm 231 has at least two, usually two or three with regard to enough proof strengths, as shown in Fig. 2, linking arm
231 upper end is fixed on the upper end oral area of middle pipe 2 by screw 91, can position in advance in a pre-installation for the ease of connector 23
Well, the outside of the upper end of the linking arm 231 is equipped with detent step 2311, and detent step 2311 has 2 radial direction of pipe in parallel
Sagittal plane is against on the upper surface of middle pipe 2 with the axial axial face of parallel middle pipe 2, the sagittal plane of detent step 2311, detent platform
The axial face of rank 2311 is attached on the inner sidewall of middle pipe 2.The lower end of linking arm 231 is connected as one with terminal pad 232, Ke Yijie
It closes Fig. 3 to see, terminal pad 232 has the centre bore 2320 passed through for the second screw rod 11, and the first nut 22 is fixed on terminal pad 232
On, the outer diameter of terminal pad 232 is less than the internal diameter of inner tube 1.The main function of connector 23 is to connect middle pipe 2 with the first nut 22
Get up, and in order to allow inner tube 1 retract as far as possible in pipe 2, shorten length of the entire electric telescopic pipe in contraction state, so
The lower end of connector 23 is protruded into inner tube 1, and when electric telescopic pipe is in contraction state, terminal pad 232 is attached to the second spiral shell
On mother 12.From Fig. 1, electric telescopic pipe is in contraction state, can be readily apparent that see, not only the lower end of connector 23
It protrudes into inner tube 1, driving device can reach in inner tube 1, and 1 almost all of inner tube is located in middle pipe 2, and middle pipe 2 is also almost
It is entirely located in outer tube 3, length of the entire electric telescopic pipe in contraction state is only longer than outer tube 3, therefore occupied space
It is small, convenient for storage and transport.
In conjunction with Fig. 1 and Fig. 3, the second screw rod 11 has inner hole 110, and the interior of the second screw rod 11 is inserted into the lower end of the first screw rod 21
See that electric telescopic pipe is in contraction state in hole 110, in Fig. 1, the first screw rod 21 has greatly all in the second screw rod 11,
It is equally beneficial for shortening length of the electric telescopic pipe in contraction state, the fixed finite place piece 211 in the lower end of the first screw rod 21, example
It is such as fixed by bolt 92, the second screw rod 11 of circumferentially positioned realization of inner hole 110 and the first spiral shell of locating part 211 and the second screw rod 11
Bar 21 rotates synchronously, and locating part 211 follows the first screw rod 21 to be axially moved along the inner hole 110 of the second screw rod 11, such as locating part
211 and second screw rod 11 inner hole 110 between by keyway cooperation or spline fitted, the outer diameter of 211 upper end of locating part it is big
In the internal diameter of the first nut 22, when the first screw rod 21 moves upward to the limit, the upper end of locating part 211 can arrive to the first nut
22 lower end prevents opposite first nut 22 of the first screw rod 21 from continuing to move up.
In conjunction with Fig. 1 and Fig. 3, in the present embodiment, second screw rod 11 is filled by connection bearing 111 and the first nut 22
2 axially position of pipe in relatively is realized with connection, and the lower end surface of the first nut 22 is equipped with annular groove 221, the upper end of the second screw rod 11
It protrudes into annular groove 221,110 sets of inner hole of the second screw rod 11 are on the interior ring-side wall of annular groove 221, outside connection bearing 111
The outer ring side wall of circle and annular groove 221 is interference fitted, and connects the outer circumference surface mistake of 11 upper end of inner ring and the second screw rod of bearing 111
It is full of cooperation, the outer ring side wall of annular groove 221 is equipped with the positioning step that axially position is carried out to the upper end of connection 111 outer ring of bearing
2211, the lower end of connection 111 outer ring of bearing, which is against in terminal pad 232, to be positioned, and the upper end of the second screw rod 11 passes through connection bearing 111
And it is equipped with the shaft block ring 112 that axially position is carried out to the upper end of connection 111 inner ring of bearing, the upper end of the second screw rod 11 is equipped with pair
The lower end for connecting 111 inner ring of bearing carries out the screw rod shaft shoulder 113 of axially position.Connection bearing 111 is placed into annular groove 221
In, one position to be convenient for connecting bearing 111, two reduce the part required for bearing 111 that is located by connecting, and three connect bearing
111 can be not take up axial space, be also beneficial to shorten length of the entire electric telescopic pipe in contraction state.Except this it
Outside, connection bearing 111 also can be positioned on connector 23, such as connection bearing 111 is located in connection by hole card spring
In the centre bore 2320 of disk 232.
In conjunction with Fig. 1, Fig. 4 and Fig. 5, driving device includes driving motor 4 and reduction gearbox, and driving motor 4 passes through connecting plate 49
It is lifted on the upper end of outer tube 3, reduction gearbox includes deceleration box 41, transmission mechanism and output shaft 42, the motor of the driving motor 4
Axis 40 has worm structure, and the transmission mechanism includes primary transmission component and secondary drive assembly, primary transmission component and two
Grade transmission component is equipped with two groups, and primary transmission component includes first-stage worm gear 431 that is coaxial and rotating synchronously and level-one worm screw
432, the worm structure engaged transmission of first-stage worm gear 431 and motor shaft 40, secondary drive assembly includes coaxial and rotates synchronously
Second-stage worm gear 441 and secondary gear 442,432 engaged transmission of second-stage worm gear 441 and level-one worm screw, output shaft 42 are equipped with and two
The driven gear 421 of 442 engaged transmission of grade gear, output shaft 42 are connect with the first screw rod 21.
The reduction gearbox of general micro-machine configuration, the especially output shaft in the motor shaft 40 of driving motor 4 and reduction gearbox
In the case that 42 is parallel, it can be engaged and be slowed down using gear more than two-stage, but all not have good reverse self-locking function, such as
In elevating mechanism, in uphill process, the load of driving motor 4 is larger, once driving motor 4 stops output torque, load
Driving motor 4 may be made to invert, cause load that can not rise to object height, not only influence to work normally needs, it is serious
It may cause load tenesmus, there is very big insecurity factor.But in the present embodiment, pass through first-stage worm gear 431 and motor
Worm structure engaged transmission on axis 40, when the output torque of motor shaft 40 is transferred to first-stage worm gear 431 and level-one worm screw 432
It is rotated by 90 ° when being exported through opposite motor shaft 40, is then made defeated by 441 engaged transmission of level-one worm screw 432 and second-stage worm gear again
90 degree are reversely rotated when torque is transferred to second-stage worm gear 441 and secondary gear 442 out, output torque is restored to motor shaft again at this time
Parallel outbound course when 40 output, then engaged by secondary gear 442 with the driven gear 421 of output shaft 42, make output shaft
42 axis is overlapped with the axis of motor shaft 40, can thus to turn round when 42 output torque of output shaft with the output of motor shaft 40
The direction of square is identical, therefore by the transmitting of transmission mechanism, the outbound course of output torque is simultaneously unaffected, and is driven
Mechanism is engaged with two-stage worm and gear, while primary transmission component and secondary drive assembly are equipped with two groups, have been equivalent to four
Grade worm and gear engagement, reverse self-locking ability is greatly reinforced, and is capable of providing more powerful output torque, therefore special
Elevating mechanism Shi Yongyu not driven.
Although bevel gear also has the ability for changing output torque direction, bevel gear is normally at the spindle nose of shaft,
Or it is mounted in shaft or shaft is directly processed into bevel gear shaft, therefore the sky other than shaft can be occupied when two bevel gear engagements
Between, therefore the volume that will lead to deceleration box 41 increases.And when worm and gear engagement, worm gear must be positioned at worm screw axial ends
In range, worm screw be must be positioned in the range of worm gear axial ends, therefore worm and gear engagement will not occupy exceptional space, so
The present invention realizes the commutation of output torque using worm and gear engaged transmission, and the structure of entire transmission mechanism can be made more to step up
It gathers, the volume of deceleration box 41 can be smaller.
First-stage worm gear 431 and level-one worm screw 432 are axially positioned in level-one shaft 433, the both ends of the level-one shaft 433
It is connect by shaft bearing 45 with deceleration box 41, the first-stage worm gear 431 and level-one worm screw 432 are equipped with to cooperate and realize
The circumferential position limiting structure that first-stage worm gear 431 and level-one worm screw 432 rotate synchronously.The circumferential direction position limiting structure includes circumferential limit hole
4311 are set in first-stage worm gear 431 on the end face towards level-one worm screw 432 with circumferential limited block 4321, circumferential limit hole 4311,
Circumferential limited block 4321 is set on level-one worm screw 432 on the end face towards first-stage worm gear 431.In the present embodiment, circumferential limit
Hole 4311 is square hole, and level-one shaft 433 is passed through from circumferential limit hole 4311, and circumferential limited block 4321 is square, level-one worm screw
The through-hole for being used to install level-one shaft 433 on 432 is passed through from circumferential limited block 4321.In addition to this, circumferential limit hole 4311
With circumferential limited block 4321 be also possible to section be triangle, D-shaped or other polygonized structures, it is ensured that output torque it is normal
Transmitting and enough reverse self-locking abilities, intensity will be met the requirements.432 separate machined of first-stage worm gear 431 and level-one worm screw,
Belonging to standard component, maintenance cost is lower, and in addition to this, first-stage worm gear 431 and level-one worm screw 432 can also be come out with overall processing,
Although it is easy for installation, and the reliability rotated synchronously is higher, belongs to non-standard, and difficulty of processing is bigger, and processing cost is high,
Maintenance cost also will increase.
The side wall of deceleration box 41 is equipped with shaft installation through-hole 410, and the inner sidewall of deceleration box 41 is equipped with pacifies with shaft
The coaxial corresponding shaft installing blind of through-hole 410 is filled, one end of level-one shaft 433 is located in shaft installation by shaft bearing 45
In blind hole, the other end of level-one shaft 433 is located in shaft installation through-hole 410 by shaft bearing 45.Level-one shaft is installed
When 433, it is inserted into deceleration box 41 from the outside of deceleration box 41 by shaft installation through-hole 410, reduces and leads on deceleration box 41
The quantity in hole reduces the place for needing to seal, is conducive to lubricating grease or lubricating oil is long-term stored in deceleration box 41.
Second-stage worm gear 441 and secondary gear 442 are axially positioned in second level shaft 443, second-stage worm gear 441 and secondary gear
442, which are structure as a whole, realizes synchronous rotation, and the both ends of second level shaft 443 are connect with deceleration box 41 by shaft bearing 45, had
Body is that the lower end of 41 inner sidewall of deceleration box is equipped with bearing block 46, and the lower end of the second level shaft 443 is located on bearing block 46,
The upper end of second level shaft 443 is located on the rear end cap of deceleration box 41 by shaft bearing 45.Second-stage worm gear 441 and secondary gear
Although wheel 442 can also as first-stage worm gear 431 with level-one worm screw 432 as separate machined, by circumferential position limiting structure realize together
Step rotation, but be that simple roller gear engages with the driven gear 421 on output shaft 42 because of secondary gear 442, second level
Gear 442 can be bigger by reverse impact, and circumferential position limiting structure is easy to cause to loosen or damage, so being preferably second level here
Worm gear 441 and secondary gear 442 are structure as a whole, although overall processing belongs to non-standard, second-stage worm gear 441 and secondary gear
Wheel 442 is coaxial configuration, and worm gear arrangement is similar to helical gear, therefore processing is relatively easy, not will increase excessive cost.Secondary gear
Wheel 442 is preferably spur gear with the driven gear 421 on output shaft 42, in the case where driving motor 4 can rotate and reverse,
Spur gear will not influence output torque, and service life longest.
Output bearing 422 is installed, the lower end of bearing block 46 is equipped with the peace of accommodating output bearing 422 on the output shaft 42
Tankage 461, the upper end of mounting groove 461 have positioning end face, and the upper end of output 422 outer ring of bearing is located on positioning end face, defeated
The lower end of shaft 42 has the shaft shaft shoulder 423 for the lower end positioning that will export 422 inner ring of bearing, and 46 lower end of bearing block is equipped with
The end cap 47 of output shaft 42 is positioned, end cap 47 positions the lower end for exporting 422 outer ring of bearing.In the present embodiment, bearing block 46
Lower end there is the first downwardly convex bulge loop 462, mounting groove 461 is located in the first bulge loop 462, the outer circle of the first bulge loop 462
There is gap, it is convex that the upper end of the end cap 47 is equipped with second to raise upward between the lower end of 41 inner sidewall of circumferential surface and deceleration box
Ring 471, the second bulge loop 471 are inserted into the gap, in this way formation fit structure, can increase convenience when installation, and
Stability after installation also mentions raising.
The lower end of output shaft 42 is equipped with shaft coupling mounting hole 424, is equipped with shaft coupling 425 in shaft coupling mounting hole 424, and first
The upper end of screw rod 21 passes through end cap 47 and connect with shaft coupling 425, and end cap 47 is equipped with the spiral shell assembled with the upper end of the first screw rod 21
Rod bearing 212, the lower end of end cap 47 are equipped with the cover board 48 for positioning screw-bearing 212.The drive end bearing bracket 401 of driving motor 4 is equipped with
Threaded hole 400, stay bolt is equipped on cover board 48, and stay bolt sequentially passes through cover board 48, end cap 47, bearing block 46, deceleration box 41
It is connect afterwards with threaded hole 400, cover board 48, end cap 47, bearing block 46, deceleration box 41 and driving motor 4 is fixed as one.
The rear end cap 411 of the deceleration box 41 is equipped with bearing mounting hole 4111, the drive end bearing bracket 401 of the driving motor 4
It is equipped with bearing locating slot 402, motor shaft 40 is stretched out from bearing locating slot 402, is equipped with jackshaft in bearing locating slot 402
403 are held, the inner ring and motor shaft 40 of intermediate bearing 403 are interference fitted, the upper end of 403 outer ring of intermediate bearing and bearing locating slot
402 interference fits, the lower end of 403 outer ring of intermediate bearing and bearing mounting hole 4111 are interference fitted.Intermediate bearing 403 can increase
The stability when intensity and output torque of motor shaft 40, improves its service life.
In addition, seeing Fig. 1 and Fig. 6, it is equipped with the sliding in reduced between pipe 2 and outer tube 3 between the middle pipe 2 and outer tube 3 and rubs
The the first sliding friction component for wiping resistance is equipped with the sliding friction reduced between inner tube 1 and middle pipe 2 and hinders between inner tube 1 and middle pipe 2
Second sliding friction component of power.The first sliding friction component include set on 3 lower end of outer tube the first rear slider component and
Set on the first advancing slip block assembly of middle pipe 2, the first advancing slip block assembly is located at the top of the first rear slider component, the first rear slider group
Part includes the first fixed frame 31 and the first rear slider 32, and the lateral wall of the first fixed frame 31 and the inner sidewall of outer tube 3 cooperate,
First rear slider 32 snaps connection on the inner sidewall of the first fixed frame 31, and the first rear slider 32 has the first Elastic buckle
321, the outer tube 3 is equipped with the first block button hole 300, and the first Elastic buckle 321 passes through the first fixed frame 31 and the first buckle
The cooperation of hole 300 is fixed by the first fixed frame 31, and the inner sidewall of the first rear slider 32 is bonded friction with the lateral wall of middle pipe 2, the
One advancing slip block assembly includes the first front-slider 24 being fixed on middle 2 lateral wall of pipe, the lateral wall and outer tube 3 of the first front-slider 24
Inner sidewall be bonded friction.First rear slider 32 and the first front-slider 24 are made of wear-resisting and small coefficient of friction material, are subtracted
Frictional resistance of few outer tube 3 in when the movement of pipe 2.The second sliding friction component includes set on the second of middle 2 lower end of pipe
Rear slider component and the second advancing slip block assembly set on inner tube 1, the second advancing slip block assembly are located at the top of the second rear slider component,
Second rear slider component includes the second fixed frame 25 and the second rear slider 26, the lateral wall of the second fixed frame 25 and middle pipe 2
Inner sidewall cooperation, the second rear slider 26 snaps connection on the inner sidewall of the second fixed frame 25, and the second rear slider 26 has
Second Elastic buckle 261, the middle pipe 2 are equipped with the second block button hole 200, and the second Elastic buckle 261 passes through the second fixed frame
25 and second the cooperation of block button hole 200 second fixed frame 25 is fixed, the inner sidewall of the second rear slider 26 and the lateral wall of inner tube 1
Fitting friction, the second advancing slip block assembly includes the second front-slider 13 being fixed on 1 lateral wall of inner tube, the second front-slider 13 it is outer
Side wall is bonded friction with the inner sidewall of outer tube 3, and the second front-slider 13 protrudes into formation bolt in inner tube 1, and second nut 12 is fixed.
Likewise, the second rear slider 26 and the second front-slider 13 are made of wear-resisting and small coefficient of friction material, pipe 2 is opposite in reduction
Frictional resistance when inner tube 1 is mobile.In addition, the second nut 12 is fixed by 13 bolt of the second front-slider, structure is simplified, also just
In installation maintenance.
In the present embodiment, the structure of the first rear slider component and the second rear slider component is the same, and only size has
Institute is different.Just illustrate the specific structure of the first rear slider component and the second rear slider component by taking the first rear slider component as an example.
Under normal circumstances, the thickness of the first fixed frame 31 is fixed, i.e., the lateral wall of the first fixed frame 31 is in
The vertical range of side wall is equal everywhere, the cross of the inner sidewall of the cross-sectional shape and outer tube 3 of the lateral wall of the first fixed frame 31
Cross sectional shape is identical, and middle pipe 2 passes through in the first fixed frame 31 insertion outer tube 3, and sliding after the lateral wall of middle pipe 2 and first
The contact friction of block 32, therefore outer tube 3, the first fixed frame 31 and middle pipe 2 can be made of the higher material of intensity, and first
Rear slider 32 is then made of wear-resisting and low coefficient of friction material, to realize the sliding that electric telescopic pipe is subject to when flexible
Frictional resistance reduces, and will not directly rub between outer tube 3 and middle pipe 2, and service life extends.
As shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10, the inner sidewall of first fixed frame 31 be equipped with the first card slot 311,
Second card slot 312 and mounting hole 313, one end of first rear slider 32 are stuck in the first card slot 311, the first rear slider 32
The other end is stuck in the second card slot 312, and the first Elastic buckle 321 is passed through from mounting hole 313.In the present embodiment, the first card
Slot 311 and the second card slot 312 are set gradually along the axial direction of outer tube 3, and the first card slot 311 is that is, close close to the lower end of outer tube 3
The lower end of first fixed frame 31, the lower end that thus can also define the first rear slider 32 is caught in the first card slot 311, after first
The upper end of sliding block 32 is caught in the second card slot 312, in the axial direction of outer tube 3, first card slot 311 and the second card slot 312 it
Between distance, be the lower wall of first card slot 311 to the upper of the second card slot 312 from the inner sidewall of the first fixed frame 31
The distance between side wall, i.e., 9 D1 in figure.The axial First terrace 3111 of parallel outer tube 3 is equipped in first card slot 311, the
The lower end of one rear slider 32 is equipped with lower grab 322, and lower grab 322 extends to the lower end of the first fixed frame 31, lower grab 322
Inner sidewall is against on First terrace 3111 and positions.Likewise, being equipped with parallel outer tube 3 axial second in the second card slot 312
Terrace 3121, the upper end of the first rear slider 32 are equipped with upper grab 323, and upper grab 323 extends to the upper end of the first fixed frame 31,
The inner sidewall of upper grab 323 is against on second step face 3121 and positions, so that the first rear slider 32 is fixed on the first fixed frame
On frame 31.The distance between the both ends of first rear slider 32 descend the lower end of grab 322 to the distance of the upper end of upper grab 323,
Such as the D2 in Fig. 9, D1 is less than D2, so the both ends of the first rear slider 32 buckle into first by elastic deformation close to each other respectively
Card slot 311 and the second card slot 312.In the present embodiment, both ends that the first rear slider 32 and the first fixed frame 31 snap connection position
In middle pipe 2,3 relative motion of outer tube direction on, middle pipe 2 start sliding moment, middle pipe 2 to the first rear slider 32 generate punching
Hit power, the first rear slider 32 there can be the elastic play of certain distance (lower grab 322 and upper grab 323 have certain elasticity)
This impact force is buffered, avoids the first rear slider 32 from being damaged by the impact of middle pipe 2, improves service life.Pacifying
In dress when pipe 2, similarly have the effect that.Because there is step surface, for the ease of processing, so the first card slot 311 and the
Two draw-in groove 312 is through the through slot of the first fixed frame 31.In addition, the both ends of the first rear slider 32 can also be by being located remotely from each other
Elastic deformation buckle into the first card slot 311 and the second card slot 312 respectively, the extending direction of lower grab 322 and upper grab 323 is anti-
To setting.
In the axial direction of outer tube 3, close to the one of 31 lower end of the first fixed frame on the inner sidewall of first rear slider 32
End is equipped with chamfering 324, is inserted into when assembling in this way convenient for middle pipe 2.In order to reduce outer tube 3 inner sidewall and inner tube 1 lateral wall it
Between spacing, that is, shorten the lateral wall of the first fixed frame 31 to the distance between the inner sidewall of the first rear slider 32, first
The inner sidewall of fixed frame 31 is equipped with accommodation groove 314, and the first rear slider 32 is placed in accommodation groove 314, the first rear slider 32
Inner sidewall is higher by accommodation groove 314, and the lower end of chamfering 324 is located in accommodation groove 314.When inner tube 1 has just been inserted into outer tube 3 in this way, regardless of
Between the two either with or without to center, being all chamfering 324 on direct contact 32 inner sidewall of the first rear slider, rather than after first
The end face of sliding block 32 not only has certain guiding role to the installation of inner tube 1, convenient for the installation of inner tube 1, and during installation
The end face of inner tube 1 will not directly hit the end face of the first rear slider 32, and the first rear slider 32 is avoided to be damaged.In the present embodiment
In, the first Elastic buckle 321 is to pass through the first fixed frame 31 from the bottom surface of accommodation groove 314.
Since when installing the first fixed frame 31, the first Elastic buckle 321 needs the inside to the first fixed frame 31
Wall retracts, and enters in outer tube 3 in the first Elastic buckle 321, can be against on the inner sidewall of outer tube 3, but is just starting installation the
When one fixed frame 31, the first Elastic buckle 321 can be stuck on the lower end surface of outer tube 3, for the ease of the contracting of the first Elastic buckle 321
It returns, one end that the lateral wall of the first fixed frame 31 is stretched out on the first Elastic buckle 321 is equipped with inclined-plane 3211, and inclined-plane 3211 is along outer
The axial of pipe 3 is tilted to the inside of the first fixed frame 31, and the inner sidewall of the first fixed frame 31 is relatively distant from inclined-plane 3211
One end close to the lower end of outer tube 3.In this way when installing the first fixed frame 31, the first Elastic buckle 321 will not deliberately be made to contract
It returns, but directly retracts the first Elastic buckle 321 by the inner sidewall of outer tube 3, to facilitate the installation of the first fixed frame 31.
The first fixed frame 31 is packed into the excessive velocities of outer tube 3 and the first Elastic buckle 321 is caused to miss the in order to prevent
One block button hole 300, the lateral wall of the first fixed frame 31 are equipped with the positioning eaves 315 outwardly protruded, first Elastic buckle 321
When cooperating with the first block button hole 300, positioning eaves 315 is against on the lower end of outer tube 3, such design, as long as positioning eaves 315 is against
On the lower end of outer tube 3, the first Elastic buckle 321 will work good with the first block button hole 300, make the first fixed frame 31 very
It installs successfully.In the present embodiment, a whole circle is arranged around the lateral wall of the first fixed frame 31 in positioning eaves 315.In addition, positioning
Eaves 315 can also be evenly equipped with multistage in the circumferential direction of the lateral wall of the first fixed frame 31.
In addition, in the present embodiment, the cross section of outer tube 3 is hexagon, and middle pipe 2, inner tube 1 are also the same, therefore first is solid
Determine frame 31 and the second fixed frame 25 is also.Equally illustrate by taking the first rear slider component as an example, the second rear slider component with
This is reference.See Figure 11, the first fixed frame 31 is made of six plates, and it is usually integrally manufactured molding, it can also be by several
A plate welding is got, and the first rear slider 32 is distributed on six plates of outer tube 3, and the inner sidewall of the first rear slider 32 is flat
Face.Such first rear slider 32 is easily worked, and be easily guaranteed that the first rear slider 32 inner sidewall and middle pipe 2 lateral wall it
Between the stability that contacts.And it is noted that the cross section of outer tube 3, inner tube 1 and the first fixed frame 31 is by positive six side
Deformation and come, the length of the one pair of them opposite side of regular hexagon be decreased to original 0.65~0.75, formed a pair of short
Side is the equal of that cross-sectional shape becomes flat, under the premise of not weakening the stability of hexagon, improves inner tube 1, middle pipe 2, outer
The load capacity of pipe 3 in the short side direction, moreover it is possible to material utilization amount and space hold amount are reduced, so that electric telescopic pipe is suitble in pairs
It uses, is used for example as the table leg of desk, the lifting of desktop may be implemented.
In addition to this, outer tube 3, middle pipe 2, inner tube 1 cross section be also possible to triangle, quadrangle, pentagon, octagon
Etc., slide block structure has no change.Outer tube 3, middle pipe 2, inner tube 1 cross section can also be ellipse, in this case, first
The inner sidewall of rear slider 32 is necessary to be arranged to elliptical arc surface, will increase certain processing cost, and sliding after all first
The center of circle of the inner sidewall of block 32 is overlapped, otherwise may cooperate with the lateral wall of middle pipe 2 it is bad, for all first rear sliders 32 it
Between install positioning precise requirements it is relatively high.
It between inner tube 1 and middle pipe 2, has no between middle pipe 2 and outer tube 3 and directly contacts, but separated by sliding block support, it is sliding
Block can be made of wear-resisting and small coefficient of friction material, therefore it is beneficial to reduce inner tube 1 relatively in pipe 2 slide when, middle pipe 2
Frictional force when opposite outer tube 3 slides, can be reduced the idle work of driving motor 4.The mode that sliding block is fixedly mounted is simple, first will be more
A sliding block is fixed on fixed frame by snap, can be interchanged between multiple sliding blocks general then unified by fixed frame
Cooperate with tube body, most wonderful is a little to realize fixed frame finally by the block button hole cooperation of the Elastic buckle and tube body of sliding block
Fixed relationship with sliding block with respect to tube body, can simplify the structure of fixed frame in this way, do not need on fixed frame setting with
The connection structure of tube body connection, and each sliding block is connect with tube body, and stability, the reliability of fixed structure are higher；In addition to
Sliding block and fixed frame, then without other parts, number of parts is considerably less, overall weight is small, is conducive to shorten installation work-hour, and
Save manpower.
In above-described embodiment, other than the lower end of inner tube is fixed, the upper end of outer tube can also be fixed, thus be become
It is motionless at the first screw rod, axial movement of first nut along the first screw rod, the first nut the second screw motion of drive, while second
Nut allows middle pipe and inner tube while moving again along the axial movement of the second screw rod；Middle pipe can also even be fixed, allow outer tube
And movement of inner pipe.In addition to above preferred embodiment, there are other embodiments of the invention, and those skilled in the art can basis
The present invention makes various changes and modifications, and as long as it does not depart from the spirit of the invention, should belong to institute in claims of the present invention
The range of definition.
Claims (2)
1. a kind of electric telescopic pipe, including inner tube, the tube and the outer tube, in the front end insertion of inner tube in pipe, the front end of middle pipe is inserted into
In outer tube, the front end of the outer tube is equipped with driving device, is equipped with the first linkage unit in the middle pipe, the first linkage unit includes
Intermeshing first screw rod and the first nut, the front end of the first screw rod are connect with driving device, and the first nut is fixed with middle pipe
Connection, is equipped with the second linkage unit in said inner tube, and the second linkage unit includes intermeshing second screw rod and the second nut,
Second screw rod and the first screw rod rotate synchronously, and the relatively middle pipe axially position of the second screw rod, the second nut is fixedly connected with inner tube,
It is characterized in that：The driving device is located inside the front end of outer tube, and when telescoping tube is in contraction state, the rear end of driving device is stretched
Enter in inner tube, the first sliding friction for managing the sliding-frictional resistance between outer tube in reducing is equipped between the middle pipe and outer tube
Component is equipped with the second sliding friction component for reducing the sliding-frictional resistance between inner tube and middle pipe, institute between inner tube and middle pipe
Stating the first sliding friction component includes the first advancing slip block assembly set on the first rear slider component of outer tube back-end and set on middle pipe,
First advancing slip block assembly is located at the front of the first rear slider component, and the first rear slider component is including after the first fixed frame and first
Sliding block, the lateral wall of the first fixed frame and the inner sidewall of outer tube cooperate, and the first rear slider is snapped connection in the first fixed frame
Inner sidewall on, the first rear slider has Elastic buckle, and the outer tube is equipped with block button hole, and the Elastic buckle of the first rear slider wears
The first fixed frame is fixed in the block button hole cooperation for crossing the first fixed frame and outer tube, the inner sidewall of the first rear slider and middle pipe
Lateral wall fitting friction, the first advancing slip block assembly includes the first front-slider being fixed on middle pipe lateral wall, the first front-slider
Lateral wall is bonded friction with the inner sidewall of outer tube.
2. electric telescopic pipe according to claim 1, it is characterised in that：The second sliding friction component includes in being set to
Second rear slider component of pipe rear end and the second advancing slip block assembly set on inner tube, the second advancing slip block assembly are located at the second rear slider
The front of component, the second rear slider component include the second fixed frame and the second rear slider, the lateral wall of the second fixed frame with
The inner sidewall of middle pipe cooperates, and the second rear slider snaps connection on the inner sidewall of the second fixed frame, and the second rear slider has bullet
Property buckle, the middle pipe is equipped with block button hole, and the Elastic buckle of the second rear slider passes through the buckle of the second fixed frame and middle pipe
The second fixed frame is fixed in hole cooperation, and the inner sidewall of the second rear slider is bonded friction, the second front-slider with the lateral wall of inner tube
Component includes the second front-slider being fixed on inner tube lateral wall, and the lateral wall of the second front-slider is bonded with the inner sidewall of middle pipe and rubs
It wipes, the second front-slider protrudes into formation bolt in inner tube and fixes the second nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073657.4A CN106678139B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073657.4A CN106678139B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
| CN201410664774.4A CN104595307B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
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| CN201410664774.4A Division CN104595307B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
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| CN106678139A CN106678139A (en) | 2017-05-17 |
| CN106678139B true CN106678139B (en) | 2018-11-30 |
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| CN201710073657.4A Active CN106678139B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
| CN201710073847.6A Active CN106641141B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
| CN201410664774.4A Active CN104595307B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
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| CN201710073847.6A Active CN106641141B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
| CN201410664774.4A Active CN104595307B (en) | 2014-11-19 | 2014-11-19 | A kind of electric telescopic pipe |
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| ITUA20162971A1 (en) * | 2016-04-28 | 2017-10-28 | Salmoiraghi S P A | INERTIAL DRIVE MOBILE DEVICE TO DOWNLOAD COILS LOADS FROM A WINDING MACHINE |
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| CN111614056B (en) * | 2020-06-06 | 2022-04-08 | 浙江康沃电力有限公司 | Electric power engineering pipeline and construction method thereof |
| CN214422160U (en) * | 2021-01-20 | 2021-10-19 | 德沃康科技集团有限公司 | Rotation stopping structure of circular tube lifting device and linear driver using same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2747280A1 (en) * | 1996-04-10 | 1997-10-17 | B I 2 S | Chassis with variable height for medical furniture |
| CN1788169A (en) * | 2003-12-15 | 2006-06-14 | 康珀德尔体育用品有限公司 | Clamp device for telescopic tubes inserted one in the other |
| CN101178087A (en) * | 2006-11-08 | 2008-05-14 | 久鼎金属实业股份有限公司 | Device capable of moving relatively without relative rotation |
| CN102057183A (en) * | 2008-06-06 | 2011-05-11 | 利纳克有限公司 | Gear with at least two gearing stages, a linear actuator comprising such a gear and a table leg comrising such a linear actuator |
| CN102619945A (en) * | 2012-04-17 | 2012-08-01 | 中国航天科技集团公司第五研究院第五一八研究所 | Multi-stage hollow screw synchronous drive telescopic manipulator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201236569Y (en) * | 2008-08-05 | 2009-05-13 | 蔡逢春 | Electric telescoping tube |
| CN201386767Y (en) * | 2009-04-02 | 2010-01-20 | 蔡逢春 | Improved structure of electric telescopic pipe |
| CN102913523B (en) * | 2012-09-26 | 2014-11-19 | 陈庆元 | Rapid telescopic support device for photography and advertisement industry |
| CN204244001U (en) * | 2014-11-19 | 2015-04-01 | 浙江捷昌线性驱动科技股份有限公司 | A kind of electric pushrod of electric machine built-in |
| CN204284117U (en) * | 2014-11-19 | 2015-04-22 | 浙江捷昌线性驱动科技股份有限公司 | Electric telescopic pipe linkage |
-
2014
- 2014-11-19 CN CN201710073657.4A patent/CN106678139B/en active Active
- 2014-11-19 CN CN201710073847.6A patent/CN106641141B/en active Active
- 2014-11-19 CN CN201410664774.4A patent/CN104595307B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2747280A1 (en) * | 1996-04-10 | 1997-10-17 | B I 2 S | Chassis with variable height for medical furniture |
| CN1788169A (en) * | 2003-12-15 | 2006-06-14 | 康珀德尔体育用品有限公司 | Clamp device for telescopic tubes inserted one in the other |
| CN101178087A (en) * | 2006-11-08 | 2008-05-14 | 久鼎金属实业股份有限公司 | Device capable of moving relatively without relative rotation |
| CN102057183A (en) * | 2008-06-06 | 2011-05-11 | 利纳克有限公司 | Gear with at least two gearing stages, a linear actuator comprising such a gear and a table leg comrising such a linear actuator |
| CN102619945A (en) * | 2012-04-17 | 2012-08-01 | 中国航天科技集团公司第五研究院第五一八研究所 | Multi-stage hollow screw synchronous drive telescopic manipulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104595307A (en) | 2015-05-06 |
| CN106678139A (en) | 2017-05-17 |
| CN106641141B (en) | 2019-03-05 |
| CN104595307B (en) | 2017-08-15 |
| CN106641141A (en) | 2017-05-10 |
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