CN220857811U - Lifting upright post with built-in motor - Google Patents

Abstract

The utility model discloses a built-in motor lifting stand column, which comprises a telescopic pipe assembly, a motor assembly, a speed reducing mechanism and a linear driving mechanism, wherein the motor assembly, the speed reducing mechanism and the linear driving mechanism are sequentially arranged in the telescopic pipe assembly along the axial direction, the speed reducing mechanism comprises a rotating piece, a hollow shell and at least one duplex gear arranged in the shell, the rotating piece is coaxially connected with the linear driving mechanism in a transmission way, and an annular tooth coaxial with the rotating piece is arranged on the end face, close to one end of the motor assembly, of the rotating piece; the double gear is rotatably connected in the shell around the axis of the double gear, and the axis of the double gear is perpendicular to the axis of the driving shaft of the motor assembly; the first gear of the duplicate gear is in transmission connection with the driving shaft of the motor assembly, and the second gear of the duplicate gear is in meshed transmission with the annular teeth. The lifting upright post of the built-in motor is simple in structure, convenient to install and low in transmission noise, and installation space is saved.

Description

Lifting upright post with built-in motor

Technical Field

The application relates to the technical field of furniture equipment, in particular to a lifting upright post with a built-in motor.

Background

The lifting stand column is also called an electric push rod or a linear brake, and structurally comprises a driving motor, a telescopic pipe and a linear driving mechanism, wherein the linear driving mechanism is generally a screw-nut pair, is connected in the telescopic pipe and is in transmission connection with the driving motor, and the driving motor acts to drive the linear driving mechanism to stretch or shrink so as to enable the telescopic pipe to expand or shrink, namely, the lifting stand column can convert the rotation of the driving motor into the linear motion of the telescopic pipe; the lifting table is widely applied to electric lifting tables, electric lifting beds, lifting platforms and the like, and is used as lifting table legs, bed legs or lifting support rods and the like.

The driving motor of the lifting stand column in the related art is provided with an external lifting stand column and an internal lifting stand column, the driving motor of the lifting stand column is externally arranged, the driving motor is generally connected to the upper end of the outer side of the telescopic tube, for example, the motor shell of the driving motor is fixedly connected with the top of the telescopic tube, a linear driving mechanism capable of enabling the telescopic tube to stretch out and draw back is arranged in the telescopic tube, and a screw rod of the linear driving mechanism is in transmission connection with the driving motor; the lifting upright post arranged in the driving motor is embedded in the inner tube of the telescopic tube, and the power output shaft of the driving motor is in transmission connection with the screw rod or the wire tube of the linear driving mechanism through a speed reducing mechanism or a speed reducing gear box; the lifting upright post with the built-in driving motor generally adopts a speed reducing mechanism of a planetary gear, such as a speed reducing gear box for a linear brake in the patent application with the publication number of CN215059232U, the speed reducing gear box adopts a planetary gear train to carry out transmission speed reduction, the planetary gear train comprises a sun gear, a plurality of planetary gears, an inner gear ring matched with the plurality of planetary gears and a planetary gear carrier for loading the plurality of planetary gears, one side of each planetary gear is meshed with the sun gear, the other side of each planetary gear is meshed with the inner gear ring, so that the planetary gears can rotate around the sun gear, and the rotation speed of the driving motor is reduced through the meshing transmission of the sun gear, the inner gear ring and the plurality of planetary gears so that a screw rod or a screw tube of the linear driving mechanism runs at a set speed.

The built-in motor lifting upright post in the related art has the following defects in the actual use process: the planetary gear train of the built-in motor lifting upright post speed reducing mechanism adopts more parts, has a complex structure and is very troublesome to install; in addition, as the planet wheel and the planet wheel carrier rotate, the fit clearance between the planet wheel carrier and the annular gear is larger, so that the planet wheel carrier easily swings and collides when rotating, the noise is larger during transmission, and the user experience is influenced; furthermore, a plurality of planet gears are distributed along the axial direction, so that the whole height of the whole speed reducing mechanism is higher, the large installation space is occupied, and the height setting of the lifting upright post is influenced.

Disclosure of utility model

The application aims to overcome the defects of the related art and provide the built-in motor lifting upright post which has the advantages of simple structure, convenience in installation, low transmission noise and installation space saving.

The technical scheme of the application is that a built-in motor lifting upright post with the following structure is provided: the telescopic tube comprises a telescopic tube assembly, a motor assembly, a speed reducing mechanism and a linear driving mechanism, wherein the motor assembly, the speed reducing mechanism and the linear driving mechanism are sequentially arranged in the telescopic tube assembly along the axial direction, the speed reducing mechanism comprises a rotating member, a hollow shell and at least one duplex gear arranged in the shell, the rotating member is coaxially connected with the linear driving mechanism in a transmission manner, and an annular tooth coaxial with the rotating member is arranged on the end face, close to one end of the motor assembly, of the rotating member; the double gear is rotatably connected in the shell around the axis of the double gear, and the axis of the double gear is perpendicular to the axis of the driving shaft of the motor assembly; the first gear of the duplicate gear is in transmission connection with the driving shaft of the motor assembly, and the second gear of the duplicate gear is in meshed transmission with the annular teeth.

In some embodiments, a mounting bracket corresponding to the duplicate gear is arranged on the inner wall of the shell, a rotating shaft with an axis perpendicular to the axis of the driving shaft of the motor assembly is connected to each mounting bracket, and the duplicate gear is connected to the rotating shaft.

In some embodiments, the double gears are two and are symmetrically distributed about the center of the motor assembly drive shaft.

In some embodiments, the drive shaft of the motor assembly is a worm coaxially coupled to the power take off of the motor assembly.

In some embodiments, the end face center of one end of the rotating piece far away from the motor assembly is concave inwards to form a concave cavity, and a plurality of limiting blocks are arranged on the inner side wall of the concave cavity along the circumferential direction; the linear driving mechanism is close to one end coaxial connection of rotating member has the transmission piece, the transmission piece is equipped with a plurality of axial extension's fixture block along circumference, be connected with the elastomer in the cavity, and a plurality of the fixture block passes through the elastomer respectively with a plurality of stopper match joint.

In some embodiments, the elastic body is provided with elastic blocks positioned at two sides of each clamping block, and the clamping blocks and the limiting blocks respectively prop against two sides of the elastic blocks.

In some embodiments, the end of the rotating member adjacent the motor assembly is provided with an axially outwardly extending annular wall on which the annular teeth are formed.

In some embodiments, the center of the bottom of the shell is connected with a positioning column, a positioning hole for plugging and positioning the positioning column is arranged in the center of the end face of the rotating piece, which is close to one end of the duplex gear, and the positioning column is in clearance fit in the positioning hole.

In some embodiments, the linear drive mechanism includes a first moving member and a second moving member axially movable relative to the first moving member; the first moving part is in transmission connection with the rotating part, and the second moving part is connected with the telescopic pipe assembly and used for driving the telescopic pipe assembly to expand or contract.

In some embodiments, the first moving part is a screw rod in transmission connection with the rotating part, the second moving part is a first supporting pipe sleeved on the screw rod, a first transmission nut is connected to the screw rod in a threaded manner, and the first supporting pipe is connected with the first transmission nut and used for limiting the first transmission nut to rotate circumferentially; the linear driving mechanism further comprises a wire tube and a second supporting tube, the wire tube is sleeved on the screw rod, the wire tube is limited in the circumferential direction relative to the screw rod and can axially move, and the wire tube is connected with a second transmission nut in a threaded manner; the second support pipe is sleeved in the first support pipe, is limited in the circumferential direction relative to the first support pipe and can move axially, and is connected with the second transmission nut and used for limiting the circumferential rotation of the second transmission nut; the telescopic pipe assembly comprises an inner pipe, a middle pipe and an outer pipe which are nested from inside to outside in sequence and can slide relatively, the middle pipe is connected with the first supporting pipe, and the outer pipe is connected with the second supporting pipe.

In summary, compared with the related art, the lifting upright post with the built-in motor has the following advantages: the speed reducing mechanism is arranged between the motor component of the built-in motor lifting upright post and the linear driving mechanism, and adopts the meshing transmission of the duplex gear and the annular teeth on the end surface of the rotating piece to realize the transmission of the torque of the motor component to the linear driving mechanism, so that the linear driving mechanism acts and drives the telescopic pipe component to stretch; the speed reducing mechanism has fewer parts, is simple and convenient to install, and has small fit clearance between the duplex gear and the driving shaft of the motor assembly and the annular teeth, and the noise generated in the transmission process is low; the axis of the duplex gear is vertical to the axis of the driving shaft of the motor assembly, namely the duplex gear is transversely arranged relative to the driving shaft of the motor assembly, so that the axial height of the speed reducing mechanism can be shortened, the height of the lifting upright post is prevented from being too high in a contracted state, and all parts in the speed reducing mechanism are more compact and the space utilization rate is higher.

Drawings

Fig. 1 is a schematic structural view of a lifting column with a built-in motor according to some embodiments of the present application.

Fig. 2 is a schematic diagram of an assembled structure of a lifting column with a built-in motor according to some embodiments of the present application.

Fig. 3 is a schematic cross-sectional view of a built-in motor lifting column according to some embodiments of the present application.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

Fig. 5 is an enlarged schematic view of a portion B in fig. 3.

Fig. 6 is a schematic structural view of a deceleration mechanism with a built-in motor lifting column according to some embodiments of the present application.

Fig. 7 is a schematic view of another angular configuration of a deceleration mechanism of a lifting column with a built-in motor according to some embodiments of the present application.

Fig. 8 is a schematic diagram of an assembled structure of a reduction mechanism with a built-in motor lifting column according to some embodiments of the present application.

Fig. 9 is a schematic view of another angular assembly of a deceleration mechanism with a built-in motor lift post according to some embodiments of the present application.

Reference numerals illustrate:

1. The telescopic tube assembly, 100, an inner tube, 101, a middle tube, 102, an outer tube, 2, a motor assembly, 200, a driving shaft, 3, a speed reducing mechanism, 300, a housing, 3000, an upper housing, 3001, a lower housing, 301, a double gear, 3010, a first gear, 3011, a second gear, 3012, a rotating shaft, 302, a rotating member, 303, an annular tooth, 304, a shaft hole, 305, an annular wall, 306, a concave cavity, 307, a limiting block, 308, a driving block, 309, a clamping block, 310, an elastic body, 311, an elastic block, 312, a positioning column, 313, a positioning hole, 4, a linear driving mechanism, 400, a lead screw, 401, a first driving nut, 402, a first supporting tube, 403, a wire tube, 404, a second driving nut, 405, a second supporting tube, 406, a mounting seat, 407, a bottom plate, 408, and a connecting column.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adapt it as desired to suit a particular application.

In describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present application will be understood in detail by those of ordinary skill in the art.

In embodiments of the application, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The invention will be described in further detail with reference to the drawings and the specific examples.

See fig. 1-9; the embodiment of the application discloses a lifting stand column with a built-in motor, which structurally comprises a telescopic pipe assembly 1, a motor assembly 2, a speed reducing mechanism 3 and a linear driving mechanism 4, wherein the motor assembly 2, the speed reducing mechanism 3 and the linear driving mechanism 4 are sequentially arranged in the telescopic pipe assembly 1 along the axial direction; in this embodiment, the motor assembly 2 is a dc or ac motor, which is connected to the inner tube 100 of the telescopic tube assembly 1 by a fastener, the power output end or driving shaft 200 of the motor assembly 2 is in transmission connection with the input end of the speed reducing mechanism 3, and the output end of the speed reducing mechanism 3 is in transmission connection with the power input end of the linear driving mechanism 4; the motor assembly 2 is powered by electricity, and power is transmitted to the linear driving mechanism 4 through the speed reducing mechanism 3, so that the linear driving mechanism 4 is driven to expand or contract, the telescopic tube assembly 1 is enabled to perform telescopic motion, and the lifting upright post is expanded or contracted.

The linear driving mechanism 4 is also called a screw 400 nut pair, and the structure of the linear driving mechanism comprises a first moving part and a second moving part which can axially move relative to the first moving part; the first moving part is in transmission connection with the motor assembly 2, and the second moving part is connected with the telescopic pipe assembly 1 and is used for driving the telescopic pipe assembly 1 to expand or contract. In particular, in the present embodiment, the linear driving mechanism 4 is installed in the inner tube 100 of the telescopic tube assembly 1, the linear driving mechanism 4 includes a lead screw 400, a transmission nut screwed on the lead screw 400, and a support tube connected with the transmission nut, the lead screw 400 is a first moving member, and the support tube is a second moving member; the support tube can limit the rotation of the transmission nut, is connected with the movable tube in the telescopic tube assembly 1, and can drive the telescopic tube assembly 1 to perform telescopic motion when the screw rod 400 is driven to rotate by the motor assembly 2.

As shown in fig. 2, 3, 4 and 5, in the present embodiment, the telescopic tube assembly 1 includes an inner tube 100, a middle tube 101 and an outer tube 102 which are nested in sequence from inside to outside and can slide relatively, the linear driving mechanism 4 includes a screw 400, a first support tube 402, a first transmission nut 401, a wire tube 403, a second support tube 405 and a second transmission nut 404, the first support tube 402 is sleeved on the screw 400, the first support tube 402 is connected with the first transmission nut 401 screwed on the screw 400, and the first support tube 402 can limit the first transmission nut 401 to rotate circumferentially; the screw tube 403 is sleeved on the screw rod 400, the screw tube 403 is limited in the circumferential direction relative to the screw rod 400 and can axially move, and a second transmission nut 404 is connected to the screw tube 403 in a threaded manner; a second support tube 405 is sleeved in the first support tube 402, is limited in circumferential direction relative to the first support tube 402 and can move axially, and the second support tube 405 is connected with a second transmission nut 404 and is used for limiting the second transmission nut 404 to rotate circumferentially; a mounting seat 406 is connected to one end of the first support tube 402 far away from the motor assembly 2, and the mounting seat 406 is connected with the middle tube 101 of the telescopic tube assembly 1; at the end of the second support tube 405 remote from the motor assembly 2, a bottom plate 407 is connected, which bottom plate 407 is connected to the outer tube 102 of the extension tube assembly 1. When the motor assembly 2 drives the screw rod 400 to rotate, the screw rod 400 synchronously drives the wire tube 403 to rotate, the first transmission nut 401 drives the first support tube 402 and the middle tube 101 of the telescopic tube assembly 1 to axially move relative to the inner tube 100, and simultaneously, the second transmission nut 404 drives the second support tube 405 and the outer tube 102 of the telescopic tube assembly 1 to axially move relative to the middle tube 101, so that the inner tube 100, the middle tube 101 and the outer tube 102 of the telescopic tube assembly 1 are expanded or contracted.

In this embodiment, the wire tube 403 is limited circumferentially relative to the screw 400 and can move axially, that is, a connecting column 408 is connected to the tail end of the screw 400, and a plurality of sliding grooves are circumferentially arranged on the connecting column 408; the inner wall of the wire tube 403 is circumferentially provided with a plurality of axially extending sliding blocks, and the sliding blocks are correspondingly inserted and matched with the sliding grooves, so that the wire tube 403 is circumferentially limited relative to the screw rod 400 and can axially stretch relatively.

It should be understood that the telescopic tube assembly 1 of the present embodiment is a three-section telescopic tube, that is, the inner tube 100, the middle tube 101 and the outer tube 102 are sequentially included from inside to outside, and in other embodiments, the telescopic tube assembly 1 may be a two-section telescopic tube or a four-section telescopic tube, and the linear driving mechanism 4 matched with the telescopic tube assembly 1 may also be changed accordingly; in this embodiment, the inner tube 100, the middle tube 101 and the outer tube 102 are all square tubes, and in other embodiments, may be round tubes, oval tubes or the like.

Referring to fig. 4 and 6-9, in the present embodiment, the speed reducing mechanism 3 includes a rotating member 302, a hollow housing, and at least one duplex gear 301 disposed in the housing, where the rotating member 302 is coaxially connected with a screw 400 of the linear driving mechanism 4 in a transmission manner, and an end surface of the rotating member 302 near one end of the motor assembly 2 is provided with an annular tooth 303 coaxial with the rotating member 302; duplex gear 301 is rotatably connected within the housing about its axis, and the axis of duplex gear 301 is perpendicular to the axis of drive shaft 200 of motor assembly 2; first gear 3010 of duplex gear 301 is in driving connection with drive shaft 200 of motor assembly 2 and second gear 3011 of duplex gear 301 is in meshed transmission with ring gear 303. The driving shaft 200 of the motor assembly 2 rotates to drive the duplex gear 301 to rotate, and the duplex gear 301 drives the rotating member 302 to rotate through the annular teeth 303, so as to drive the screw 400 of the linear driving mechanism 4 to rotate.

In the embodiment, the speed reducing mechanism 3 adopts the meshing transmission of the duplex gear 301 and the annular teeth 303 on the end surface of the rotating piece 302 to transmit the torque of the motor assembly 2 to the linear driving mechanism 4, so that the linear driving mechanism 4 acts and drives the telescopic tube assembly 1 to stretch; the speed reducing mechanism 3 has fewer parts, is simple and convenient to install, and has small fit clearance between the duplex gear 301 and the driving shaft 200 of the motor assembly 2 and the annular teeth 303, and the noise generated in the transmission process is low; the axis of the duplex gear 301 is perpendicular to the axis of the driving shaft 200 of the motor assembly 2, that is, the duplex gear 301 is transversely arranged relative to the driving shaft 200 of the motor assembly 2, so that the axial height of the speed reducing mechanism 3 can be shortened, the height of the lifting upright post is prevented from being too high in a contracted state, the parts inside the speed reducing mechanism 3 are more compact, and the space utilization rate is higher.

Further in this embodiment, the two duplex gears 301 are symmetrically distributed about the center of the driving shaft 200 of the motor assembly 2, and the driving shaft 200 of the motor assembly 2 rotates and drives the two duplex gears 301 to rotate at the same time, so that the rotating member 302 rotates, and the arrangement makes the transmission structure of the reduction mechanism 3 more stable, and the structural stability is good in the transmission process; in other embodiments, the duplex gears 301 may be three, four, etc. that are uniformly distributed circumferentially about the centerline of the drive shaft 200 of the motor assembly 2.

In some embodiments, mounting brackets corresponding to the duplex gear 301 are provided on the inner wall of the housing, each mounting bracket having a rotary shaft 3012 connected thereto, the axis of which is perpendicular to the axis of the drive shaft 200 of the motor assembly 2, and the duplex gear 301 is connected to the rotary shaft 3012. In particular, in the present embodiment, as shown in fig. 8 and 9, the housing 300 of the speed reducing mechanism 3 includes an upper housing 3000 and a lower housing 3001, the upper housing 3000 and the lower housing 3001 are integrally connected in a height direction, mounting grooves for mounting the duplex gear 301 after the upper housing 3000 and the lower housing 3001 are connected are correspondingly formed in the upper housing 3000 and the lower housing 3001, two shaft holes 304 are formed at two ends of the mounting grooves, a rotating shaft 3012 is connected in the two shaft holes 304, and the duplex gear 301 is rotatably connected to the rotating shaft 3012; the shaft hole 304, i.e., the mounting bracket, in other words, the upper and lower cases 3000 and 3001 are provided with half or semicircular mounting grooves and shaft holes 304, and complete mounting grooves and shaft holes 304 are formed after the upper and lower cases 3000 and 3001 are coupled. And after the double gear 301 is assembled with the upper and lower cases 3000 and 3001, the second gear 3011 of the double gear 301 is exposed out of the lower case 3001 toward the rotating member 302, and when the reduction mechanism 3 is installed between the motor assembly 2 and the linear driving mechanism 4, the second gear 3011 of the double gear 301 can be just engaged with the annular teeth 303 on the rotating member 302, thereby facilitating the installation thereof.

In this embodiment, the driving shaft 200 of the motor assembly 2 is configured as a worm, the first gear 3010 of the duplex gear 301 is configured as a worm wheel meshed with the worm, the second gear 3011 is a helical gear, and the ring gear 303 is a gear that cooperatively drives with the helical gear of the second gear 3011.

It will be appreciated that the end face of the rotating member 302 adjacent to the end of the motor assembly 2 is provided with annular teeth 303 coaxial with the rotating member 302, which means that the end of the rotating member 302 adjacent to the motor assembly 2 is provided with an annular wall 305 extending axially outwardly, the annular teeth 303 being formed on the annular wall 305. That is, the rotary member 302 adopts a structure with end face teeth, the annular teeth 303 are axially formed on the end face of the rotary member 302, but not on the peripheral wall of the rotary member 302, so that the annular teeth 303 and the second gear 3011 of the duplex gear 301 are simpler and more convenient to install; and the fit clearance between the second gear 3011 of the duplex gear 301 and the annular tooth 303 can be set to be small, so that noise generated by overlarge fit clearance of the two gears is reduced or reduced.

In some embodiments, in order to further improve the transmission stability between the annular teeth 303 and the duplex gear 301 of the reduction mechanism 3, a positioning column 312 is connected to the center of the bottom of the housing, a positioning hole 313 for inserting and positioning the positioning column 312 is provided in the center of the end face of the rotating member 302, which is close to one end of the duplex gear 301, as shown in fig. 8 and 9, the positioning column 312 is in clearance fit in the positioning hole 313, and the cooperation of the positioning column 312 and the positioning hole 313 can further reduce the shake when the rotating member 302 rotates, so that the rotating member 302 is driven to rotate more stably.

In some embodiments, as shown in fig. 8 and 9, the end face center of the rotating member 302, which is far away from one end of the motor assembly 2, is concaved inwards to form a concave cavity 306, and a plurality of limiting blocks 307 are circumferentially arranged on the inner side wall of the concave cavity 306; the linear driving mechanism 4 is coaxially connected to a transmission block 308 near one end of the rotating member 302, the transmission block 308 is circumferentially provided with a plurality of axially extending clamping blocks 309, an elastic body 310 is connected in the cavity 306, and the plurality of clamping blocks 309 are respectively clamped with the plurality of limiting blocks 307 through the elastic body 310. Further, the elastic body 310 has elastic blocks 311 located at two sides of each clamping block 309, and the clamping blocks 309 and the limiting blocks 307 respectively abut against two sides of the elastic blocks 311.

A concave cavity 306 is arranged on the end surface of the rotating piece 302, and a limiting block 307 which is matched and clamped with a clamping block 309 on a transmission block 308 is connected in the cavity 306; namely, a limiting block 307 which is matched with the clamping block 309 and is limited in the circumferential direction is arranged in the concave cavity 306; thus, when the transmission block 308 is connected with the rotating member 302, the clamping block 309 of the transmission block 308 is directly inserted into the concave cavity 306 and matched with the limiting block 307, so that the connection part of the transmission block 308 and the rotating member 302 is at least partially hidden in the concave cavity 306, the axial distance between the transmission block 308 and the rotating member 302 is shortened, the connection structure of the transmission block 308 and the rotating member 302 is more compact, the transmission stability is good, the possibility of entering dust and impurities can be effectively reduced, and the transmission of the transmission mechanism is more stable and noiseless. The entry of dust and impurities into the surface of the elastic body 310 is effectively reduced, so that the scratch and abrasion of the surface of the elastic body 310 are reduced, and the service life of the elastic body 310 is prolonged. The elastic body 310 of the present embodiment is an elastic body 310 made of rubber or plastic.

In the description of the embodiments of the present application, it should be noted that, in the description of the present application, terms such as "inner", "outer", and the like, refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or components must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present application.

In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "in this embodiment," "specific examples," or "some examples," etc., mean that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a built-in motor lift stand, it includes flexible pipe assembly and installs in proper order along the axial motor assembly, reduction gears and the linear drive mechanism in the flexible pipe assembly, its characterized in that: the speed reducing mechanism comprises a rotating piece, a hollow shell and at least one duplex gear arranged in the shell, the rotating piece is coaxially connected with the linear driving mechanism in a transmission way, and an annular tooth coaxial with the rotating piece is arranged on the end face of the rotating piece, which is close to one end of the motor assembly; the double gear is rotatably connected in the shell around the axis of the double gear, and the axis of the double gear is perpendicular to the axis of the driving shaft of the motor assembly; the first gear of the duplicate gear is in transmission connection with the driving shaft of the motor assembly, and the second gear of the duplicate gear is in meshed transmission with the annular teeth.

2. The built-in motor lifting column according to claim 1, wherein: the inner wall of the shell is provided with mounting brackets corresponding to the duplex gears, each mounting bracket is connected with a rotating shaft with the axis perpendicular to the axis of the driving shaft of the motor assembly, and the duplex gears are connected to the rotating shaft.

3. The built-in motor lifting column according to claim 1, wherein: the number of the duplicate gears is two, and the duplicate gears are symmetrically distributed about the center of the driving shaft of the motor assembly.

4. A built-in motor lifting column according to any one of claims 1 to 3, wherein: the driving shaft of the motor assembly is a worm coaxially connected with the power output end of the motor assembly.

5. The built-in motor lifting column according to claim 4, wherein: the end face center of one end, far away from the motor component, of the rotating piece is inwards recessed to form a concave cavity, and a plurality of limiting blocks are arranged on the inner side wall of the concave cavity along the circumferential direction; the linear driving mechanism is close to one end coaxial connection of rotating member has the transmission piece, the transmission piece is equipped with a plurality of axial extension's fixture block along circumference, be connected with the elastomer in the cavity, and a plurality of the fixture block passes through the elastomer respectively with a plurality of stopper match joint.

6. The built-in motor lifting column according to claim 5, wherein: the elastic body is provided with elastic blocks positioned on two sides of each clamping block, and the clamping blocks and the limiting blocks are respectively propped against two sides of the elastic blocks.

7. The built-in motor lifting column according to claim 1, wherein: the end of the rotating member adjacent to the motor assembly is provided with an annular wall extending axially outwardly, and the annular teeth are formed on the annular wall.

8. The built-in motor lifting column according to claim 1, wherein: the center of the bottom of the shell is connected with a positioning column, the center of the end face of the rotating piece, which is close to one end of the duplex gear, is provided with a positioning hole for the positioning column to be inserted and positioned, and the positioning column is in clearance fit in the positioning hole.

9. The built-in motor lifting column according to claim 1, wherein: the linear driving mechanism comprises a first moving part and a second moving part which can axially move relative to the first moving part; the first moving part is in transmission connection with the rotating part, and the second moving part is connected with the telescopic pipe assembly and used for driving the telescopic pipe assembly to expand or contract.

10. The built-in motor lifting column according to claim 9, wherein: the first moving part is a screw rod in transmission connection with the rotating part, the second moving part is a first supporting pipe sleeved on the screw rod, a first transmission nut is connected to the screw rod in a threaded manner, and the first supporting pipe is connected with the first transmission nut and used for limiting the circumferential rotation of the first transmission nut; the linear driving mechanism further comprises a wire tube and a second supporting tube, the wire tube is sleeved on the screw rod, the wire tube is limited in the circumferential direction relative to the screw rod and can axially move, and the wire tube is connected with a second transmission nut in a threaded manner; the second support pipe is sleeved in the first support pipe, is limited in the circumferential direction relative to the first support pipe and can move axially, and is connected with the second transmission nut and used for limiting the circumferential rotation of the second transmission nut; the telescopic pipe assembly comprises an inner pipe, a middle pipe and an outer pipe which are nested from inside to outside in sequence and can slide relatively, the middle pipe is connected with the first supporting pipe, and the outer pipe is connected with the second supporting pipe.