CN111115487A

CN111115487A - Electric lifting rod

Info

Publication number: CN111115487A
Application number: CN201911272763.0A
Authority: CN
Inventors: 周礼兵; 余文华; 黄智�; 熊友军
Original assignee: Ubtech Robotics Corp
Current assignee: Ubtech Robotics Corp
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-05-08
Anticipated expiration: 2039-12-12
Also published as: CN111115487B

Abstract

The application discloses an electric lifting rod, which comprises a base, a first sleeve, a transmission screw rod, a driving mechanism, a second sleeve, a first screw rod nut, a hollow screw rod sleeved outside the transmission screw rod, a third sleeve and a second screw rod nut, wherein the second screw rod nut is arranged on the hollow screw rod and connected with the third sleeve; the hollow screw rod is rotatably arranged on the second sleeve, a spline groove is formed in the inner wall of the hollow screw rod, and a spline shaft is arranged at one end, far away from the base, of the transmission screw rod; the spline shaft is provided with a spline bulge inserted in the spline groove. The transmission lead screw drives the hollow lead screw to rotate through the spline shaft when rotating, and then realizes driving the second sleeve and the third sleeve to do telescopic motion simultaneously, therefore the telescopic stroke of electric lift rod be second sleeve and third telescopic length with, under the condition of same telescopic stroke, the length of first sleeve, second sleeve and third sleeve can be enough little, for the lifter of traditional two sections formula, has effectively reduced the whole length of lifter.

Description

Electric lifting rod

Technical Field

The application relates to the field of lifting equipment, in particular to an electric lifting rod.

Background

The mature electric lifting rod at present is mostly in a two-section type, and is generally applied due to simple structure and stable operation. However, the length of the lifting rod of the consumer electronic product is required to be large and cannot be too long, otherwise, the height of the electronic product is greatly increased. And the length of the two-section type lifting rod is much larger with the same telescopic stroke, so that the requirement of consumer electronic products on shorter size is difficult to meet.

Disclosure of Invention

An object of this application is to provide an electric lift pole, aims at solving among the prior art, under the condition of equal flexible stroke, the too big problem of two-section formula lifter length.

To achieve the purpose, the following technical scheme is adopted in the application:

the electric lifting rod comprises a base, a first sleeve arranged on the base, a transmission screw rod which is rotatably arranged on the base and is positioned in the first sleeve, a driving mechanism used for driving the transmission screw rod to rotate, a second sleeve arranged in the first sleeve, a first screw rod nut which is arranged on the transmission screw rod and is connected with the second sleeve, a hollow screw rod which is sleeved outside the transmission screw rod and is positioned in the second sleeve, a third sleeve arranged in the second sleeve, and a second screw rod nut which is arranged on the hollow screw rod and is connected with the third sleeve; the hollow screw rod is rotatably arranged on the second sleeve, a spline groove is formed in the inner wall of the hollow screw rod, and a spline shaft is arranged at one end, far away from the base, of the transmission screw rod; the spline shaft is provided with a spline bulge inserted in the spline groove.

Furthermore, at least one first guide support is installed on the first lead screw nut, a first guide wheel is installed on the first guide support in a rotating mode, and the first guide wheel is arranged in contact with the inner wall of the first sleeve.

Furthermore, the number of the first guide brackets is multiple, and the multiple first guide brackets are distributed along the circumference of the first screw rod nut; each first guide bracket is provided with the first guide wheel.

Furthermore, a first guide fixing disc is arranged on the inner wall of the first sleeve; a plurality of first guide rods which correspond to the first guide supports one to one are arranged on the first guide fixing disc; the side surface of the first guide wheel is provided with a first guide groove matched with the first guide rod, and the side surface of the first guide rod is in contact with the inner wall of the first guide groove.

Furthermore, at least one second guide bracket is installed on the second lead screw nut, a second guide wheel is rotatably installed on the second guide bracket, and the second guide wheel is in contact with the inner wall of the second sleeve.

Furthermore, the number of the second guide brackets is multiple, and the second guide brackets are distributed along the circumference of the second screw rod nut; and each second guide bracket is provided with the first guide wheel.

Furthermore, a second guide fixing disc is arranged on the inner wall of the second sleeve; a plurality of second guide rods which correspond to the second guide brackets one by one are arranged on the second guide fixing disc; and a second guide groove matched with the second guide rod is formed in the side surface of the second guide wheel, and the side surface of the second guide rod is in contact with the inner wall of the second guide groove.

Furthermore, the driving mechanism comprises a driving motor arranged on the base, a driving wheel arranged on an output shaft of the driving motor, a driven wheel arranged on the transmission screw rod, and a transmission assembly arranged between the driving wheel and the driven wheel.

Furthermore, the driving wheel and the driven wheel are belt wheels, the transmission assembly is a transmission belt, and the transmission belt is sleeved between the driving wheel and the driven wheel;

or the driving wheel and the driven wheel are both gears, and the transmission component is a gear component in transmission.

Furthermore, the base is provided with an installation cavity, and the base is provided with an installation hole which is communicated with the installation cavity; the first bearing is arranged at the mounting hole, and the transmission screw rod is arranged on the base through the first bearing; the action wheel, follow the driving wheel, and transmission assembly all locates the installation intracavity.

Further, a second bearing is mounted on the first guide bracket; the first guide bracket is connected with the second sleeve; the hollow screw rod is rotatably arranged on the second sleeve through the second bearing.

Further, a first flexible sealing ring is arranged on the inner wall of the first sleeve and is in contact with the outer wall of the second sleeve; and a second flexible sealing ring is arranged on the inner wall of the second sleeve and is in contact with the outer wall of the third sleeve.

Furthermore, a first position sensor for detecting the lifting height of the second sleeve is installed in the first sleeve; and a second position sensor for detecting the lifting height of the third sleeve is arranged in the second sleeve.

The beneficial effect of this application: the transmission lead screw drives the hollow lead screw to rotate through the spline shaft when rotating, and then realizes driving the second sleeve and the third sleeve to do telescopic motion simultaneously, therefore the telescopic stroke of electric lift rod be second sleeve and third telescopic length with, under the condition of same telescopic stroke, the length of first sleeve, second sleeve and third sleeve can be enough little, for the lifter of traditional two sections formula, has effectively reduced the whole length of lifter.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of an electric lift according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of the motorized lift pins of FIG. 1 shown in an extended position;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a cross-sectional view of the drive screw with the hollow screw assembled in an embodiment of the present application;

FIG. 5 is an exploded view of the motorized lift pin of FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 2 at B;

FIG. 7 is a schematic structural view of the third sleeve of FIG. 5;

FIG. 8 is a schematic view of the second sleeve of FIG. 5;

in the figure:

1. a base; 101. mounting holes; 102. a mounting cavity; 2. a first sleeve; 3. a transmission screw rod; 4. a drive mechanism; 401. a drive motor; 402. a driving wheel; 403. a driven wheel; 404. a transmission assembly; 4041. a transmission belt; 5. a second sleeve; 6. a first lead screw nut; 7. a hollow lead screw; 701. a spline groove; 8. a third sleeve; 9. a second feed screw nut; 10. a spline shaft; 1001. a spline projection; 11. a first guide bracket; 12. a first guide wheel; 1201. a first guide groove; 13. a first guide fixing disc; 14. a first guide bar; 15. a second guide bracket; 16. a second guide wheel; 1601. a second guide groove; 17. a second guide fixing disc; 18. a second guide bar; 19. a first bearing; 20. a second bearing; 21. a first flexible sealing ring; 22. a second flexible sealing ring; 23. a first position sensor; 24. a second position sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The following detailed description of implementations of the present application is provided in conjunction with specific embodiments.

As shown in fig. 1-3, an embodiment of the present application provides an electric lifting rod, which includes a base 1, a first sleeve 2 installed on the base 1, a transmission screw 3 rotatably installed on the base 1 and located in the first sleeve 2, a driving mechanism 4 for driving the transmission screw 3 to rotate, a second sleeve 5 installed in the first sleeve 2, a first lead screw nut 6 installed on the transmission screw 3 and connected to the second sleeve 5, a hollow lead screw 7 sleeved outside the transmission screw 3 and located in the second sleeve 5, a third sleeve 8 installed in the second sleeve 5, and a second lead screw nut 9 installed on the hollow lead screw 7 and connected to the third sleeve 8; the hollow screw 7 is rotatably mounted on the second sleeve 5, please refer to fig. 4 synchronously, the inner wall of the hollow screw 7 is provided with a spline groove 701, and one end of the transmission screw 3 away from the base 1 is provided with a spline shaft 10; spline shaft 10 is provided with spline projection 1001 inserted into spline groove 701.

In the embodiment of the application, the electric lifting rod stretching process is as follows: the driving mechanism 4 drives the transmission screw rod 3 to rotate on the base 1, when the transmission screw rod 3 rotates, a first screw rod nut 6 sleeved on the transmission screw rod 3 moves along the axis direction of the transmission screw rod 3, and then a second sleeve 5 connected with the first screw rod nut 6 is driven to move along the axis direction of the transmission screw rod 3, so that the second sleeve 5 extends out of (or retracts into) the first sleeve 2; meanwhile, as the spline shaft 10 is arranged between the transmission screw rod 3 and the hollow screw rod 7, when the transmission screw rod 3 rotates, the hollow screw rod 7 is driven by the spline shaft 10 to rotate relative to the second sleeve 5 (when the hollow screw rod 7 rotates relative to the second sleeve 5, the hollow screw rod 7 synchronously moves along the axis direction of the transmission screw rod 3 along with the second sleeve 5), when the hollow screw rod 7 rotates, the second screw rod nut 9 sleeved on the hollow screw rod 7 moves along the axis direction of the hollow screw rod 7, and then the third sleeve 8 connected with the second screw rod nut 9 is driven to move along the axis direction of the hollow screw rod 7, so that the third sleeve 8 stretches out (or retracts) into the second sleeve 5, and the electric lifting rod is stretched out and retracted.

Please refer to fig. 4-5 synchronously, because of the effect of the transmission screw rod 3, the hollow screw rod 7 and the spline shaft 10, the transmission screw rod 3 drives the hollow screw rod 7 to rotate through the spline shaft 10 when rotating, and further drives the second sleeve 5 and the third sleeve 8 to do telescopic motion simultaneously, therefore, the telescopic stroke of the electric lifting rod provided by the embodiment of the present application is the sum of the lengths of the second sleeve 5 and the third sleeve 8, under the condition of the same telescopic stroke, the lengths of the first sleeve 2 and the second sleeve 5 and the third sleeve 8 arranged in the first sleeve 2 can be small enough, compared with the traditional two-section lifting rod (the length of the extending rod is the telescopic stroke), the overall length of the lifting rod is effectively reduced, and the requirement of the consumer robot electronic product on miniaturization is met.

It will be appreciated that a fourth and fifth sleeve … … may also be provided for the same telescopic stroke. Only a plurality of hollow screw rods 7 need to be continuously arranged, spline shafts 10 are arranged between the adjacent hollow screw rods 7, and then a plurality of theoretical infinite sleeves are integrated on one electric lifting rod.

Further, referring to fig. 2 and 5, as another embodiment of the electric lifting rod provided by the present application, at least one first guiding bracket 11 is installed on the first lead screw nut 6, a first guiding wheel 12 is rotatably installed on the first guiding bracket 11, and the first guiding wheel 12 is disposed in contact with the inner wall of the first sleeve 2. In the process that the second sleeve 5 extends out of or retracts into the first sleeve 2 along with the first lead screw nut 6, the first guide wheel 12 rotatably mounted on the first guide bracket 11 rotates along the inner wall of the first sleeve 2, so that the second sleeve 5 can stably move along the axial direction of the first sleeve 2 (the axial direction of the transmission lead screw 3).

Further, referring to fig. 2 and 5, as another embodiment of the electric lifting rod provided by the present application, the number of the first guide brackets 11 is multiple, and the multiple first guide brackets 11 are distributed along the circumference of the first lead screw nut 6; each first guide bracket 11 is provided with a first guide wheel 12. The first guide brackets 11 are distributed along the circumference of the first spindle nut 6 and the first guide wheels 12 are in contact with the inner wall of the first sleeve 2, so that the second sleeve 5 is not deflected relative to the first sleeve 2 when moving (no deflection occurs in the radial direction of the first sleeve 2).

Further, referring to fig. 2 and fig. 5 to 8, as another embodiment of the electric lifting rod provided by the present application, a first guiding fixing plate 13 is disposed on an inner wall of the first sleeve 2; a plurality of first guide rods 14 which correspond to the first guide brackets 11 one by one are arranged on the first guide fixing disc 13; the first guide groove 1201 that is adapted to first guide bar 14 is seted up to the side surface of first leading wheel 12, and the side surface of first guide bar 14 sets up with the inner wall contact of first guide groove 1201, and also first guide bar 14 is absorbed in first guide groove 1201, and then has realized the circumference spacing to first leading truck and second sleeve 5, and consequently first leading truck and second sleeve 5 can not rotate 2 relatively for the axis direction motion of first sleeve 2 can be stabilized along to second sleeve 5.

Further, referring to fig. 2 and fig. 5 to 8, as another embodiment of the electric lifting rod provided by the present application, at least one second guiding bracket 15 is installed on the second lead screw nut 9, a second guiding wheel 16 is rotatably installed on the second guiding bracket 15, and the second guiding wheel 16 is disposed in contact with the inner wall of the second sleeve 5. In the process that the third sleeve 8 extends out of or retracts into the second sleeve 5 along with the second lead screw nut 9, the second guide wheel 16 rotatably mounted on the second guide bracket 15 rotates along the inner wall of the second sleeve 5, so that the third sleeve 8 can stably move along the axial direction of the second sleeve 5 (the axial direction of the transmission lead screw 3).

Further, referring to fig. 2 and fig. 5 to 8, as another embodiment of the electric lifting rod provided in the present application, the number of the second guide brackets 15 is multiple, and the multiple second guide brackets 15 are distributed along the circumference of the second lead screw nut 9; each second guide bracket 15 is provided with a first guide wheel 12. The second guide brackets 15 are distributed along the circumference of the second spindle nut 9 and the second guide wheels 16 are in contact with the inner wall of the second sleeve 5, so that the third sleeve 8 is not deflected relative to the second sleeve 5 when it is displaced (no deflection in the radial direction of the second sleeve 5 occurs).

Further, referring to fig. 2 and fig. 5 to 8, as another embodiment of the electric lifting rod provided in the present application, a second guiding fixing plate 17 is disposed on an inner wall of the second sleeve 5; a plurality of second guide rods 18 which correspond to the second guide brackets 15 one by one are arranged on the second guide fixing disc 17; the second guide groove 1601 that is adapted to the second guide bar 18 is seted up to the side surface of second leading wheel 16, and the side surface of second guide bar 18 and the inner wall contact setting of second guide groove 1601, and the second guide bar 18 is absorbed in the second guide groove 1601 promptly, and then has realized the circumference spacing to second leading truck and third sleeve 8, therefore second leading truck and third sleeve 8 can not rotate relative to second sleeve 5 for the axis direction motion along second sleeve 5 that third sleeve 8 can be stable.

Further, referring to fig. 2 and 5, as another embodiment of the electric lifting rod provided in the present application, the driving mechanism 4 includes a driving motor 401 mounted on the base 1, a driving wheel 402 mounted on an output shaft of the driving motor 401, a driven wheel 403 mounted on the driving screw 3, and a transmission assembly 404 disposed between the driving wheel 402 and the driven wheel 403. The process that the driving mechanism 4 drives the transmission screw rod 3 to rotate relative to the base 1 is as follows: the driving motor 401 drives the driving wheel 402 to rotate, and then drives the driven wheel 403 to rotate through the transmission belt 4041 of the transmission component 404, so as to drive the transmission screw rod 3 to rotate.

Further, referring to fig. 2 and fig. 5, as another embodiment of the electric lifting rod provided in the present application, the driving wheel 402 and the driven wheel 403 are both belt wheels, the transmission component 404 is a transmission belt 4041, and the transmission belt 4041 is sleeved between the driving wheel 402 and the driven wheel 403.

Further, as another embodiment of the electric lifting rod provided in the present application, the driving wheel 402 and the driven wheel 403 may be both gears, and the transmission assembly 404 is a gear assembly.

Further, referring to fig. 2 and fig. 5, as another embodiment of the electric lifting rod provided in the present application, the base 1 has a mounting cavity 102, and the base 1 is provided with a mounting hole 101 corresponding to the mounting cavity 102; a first bearing 19 is arranged at the mounting hole 101, and the transmission screw rod 3 is mounted on the base 1 through the first bearing 19; the driving wheel 402, the driven wheel 403 and the transmission assembly 404 are arranged in the installation cavity 102, so that the compactness of the structure of the electric lifting rod is improved.

Further, referring to fig. 2 and 5, as another embodiment of the electric lifting rod provided in the present application, a second bearing 20 is installed on the first guide bracket 11; the first guide bracket 11 is connected with the second sleeve 5; the hollow screw 7 is rotatably mounted on the second sleeve 5 via a second bearing 20.

Further, referring to fig. 2 and 5, as another embodiment of the electric lifting rod provided in the present application, a first flexible sealing ring 21 is disposed on an inner wall of the first sleeve 2, and the first flexible sealing ring 21 is disposed in contact with an outer wall of the second sleeve 5; the inner wall of the second sleeve 5 is provided with a second flexible sealing ring 22, and the second flexible sealing ring 22 is arranged in contact with the outer wall of the third sleeve 8. The first flexible sealing ring 21 can fill the gap between the first sleeve 2 and the second sleeve 5, so as to prevent external foreign matters from entering the first sleeve 2, so that the internal structure is damaged by the foreign matters when the electric lifting rod acts. The second flexible sealing ring 22 can fill the gap between the second sleeve 5 and the third sleeve 8, so as to prevent external foreign matters from entering the second sleeve 5, so that the internal structure is damaged by the foreign matters when the electric lifting rod acts.

Further, please refer to fig. 5, as another specific embodiment of the electric lifting rod provided in the present application, a first position sensor 23 for detecting a lifting height of the second sleeve 5 is installed in the first sleeve 2, so as to prevent the second sleeve 5 and the first sleeve 2 from generating a rigid impact; and a second position sensor 24 for detecting the lifting height of the third sleeve 8 is arranged in the second sleeve 5, so that rigid impact between the third sleeve 8 and the second sleeve 5 is avoided.

It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. The electric lifting rod is characterized by comprising a base, a first sleeve arranged on the base, a transmission screw rod which is rotatably arranged on the base and is positioned in the first sleeve, a driving mechanism used for driving the transmission screw rod to rotate, a second sleeve arranged in the first sleeve, a first screw rod nut which is arranged on the transmission screw rod and is connected with the second sleeve, a hollow screw rod which is sleeved outside the transmission screw rod and is positioned in the second sleeve, a third sleeve arranged in the second sleeve, and a second screw rod nut which is arranged on the hollow screw rod and is connected with the third sleeve; the hollow screw rod is rotatably arranged on the second sleeve, a spline groove is formed in the inner wall of the hollow screw rod, and a spline shaft is arranged at one end, far away from the base, of the transmission screw rod; the spline shaft is provided with a spline bulge inserted in the spline groove.

2. The electric lifting rod of claim 1, wherein the first screw nut is provided with at least one first guide bracket, the first guide bracket is rotatably provided with a first guide wheel, and the first guide wheel is in contact with the inner wall of the first sleeve.

3. The motorized lift pin of claim 2 wherein said first guide brackets are plural in number, said plural first guide brackets being distributed along a circumference of said first feed screw nut; each first guide bracket is provided with the first guide wheel.

4. The motorized lift pin of claim 3 wherein the inner wall of the first sleeve is provided with a first guide retaining disk; a plurality of first guide rods which correspond to the first guide supports one to one are arranged on the first guide fixing disc; the side surface of the first guide wheel is provided with a first guide groove matched with the first guide rod, and the side surface of the first guide rod is in contact with the inner wall of the first guide groove.

5. The electric lifting rod as claimed in any one of claims 1 to 4, wherein at least one second guide bracket is mounted on the second lead screw nut, a second guide wheel is rotatably mounted on the second guide bracket, and the second guide wheel is in contact with the inner wall of the second sleeve.

6. The motorized lift pin of claim 5 wherein said second guide brackets are plural in number, said second guide brackets being distributed along a circumference of said second feed screw nut; and each second guide bracket is provided with the first guide wheel.

7. The electric lifting rod of claim 6, wherein the inner wall of the second sleeve is provided with a second guide fixing disc; a plurality of second guide rods which correspond to the second guide brackets one by one are arranged on the second guide fixing disc; and a second guide groove matched with the second guide rod is formed in the side surface of the second guide wheel, and the side surface of the second guide rod is in contact with the inner wall of the second guide groove.

8. The electric lifting rod as claimed in claim 1, wherein the driving mechanism comprises a driving motor mounted on the base, a driving wheel mounted on an output shaft of the driving motor, a driven wheel mounted on the transmission screw rod, and a transmission assembly disposed between the driving wheel and the driven wheel.

9. The electric lifting rod as claimed in claim 8, wherein the driving wheel and the driven wheel are both belt wheels, the transmission assembly is a transmission belt, and the transmission belt is sleeved between the driving wheel and the driven wheel;

10. The motorized lifter bar of claim 1, wherein an inner wall of the first sleeve is provided with a first flexible sealing ring, the first flexible sealing ring being disposed in contact with an outer wall of the second sleeve; and a second flexible sealing ring is arranged on the inner wall of the second sleeve and is in contact with the outer wall of the third sleeve.