阅读说明：本技术 一种电动升降桌 (Electric lifting table ) 是由 张毅 于 2020-07-30 设计创作，主要内容包括：本发明涉及电动桌技术领域,尤其公开了一种电动升降桌,包括承载架、设置于承载架的桌板、与承载架配合的支撑架、设置于承载架的电动升降机构；电动升降机构包括减速器、可拆卸设置于减速器的电机、与减速器的输出端连接的丝杆件、螺接套设在丝杆件外侧并设置于支撑架的第一螺母；减速器包括减速机壳、设置于减速机壳外侧的多个固定板、分别与多个固定板配合使用的多个固定件,固定件用于将固定板固定在承载架上,电机可拆卸连接在减速机壳上；实际制造时,支撑架、承载架、电动升降机构单独组装完成,然后将电动升降机构的减速器固定在承载架上,将第一螺母固定在支撑架上,实现电动升降桌的安装装配,提升安装效率及拆卸效率。(The invention relates to the technical field of electric tables, and particularly discloses an electric lifting table, which comprises a bearing frame, a table top arranged on the bearing frame, a support frame matched with the bearing frame, and an electric lifting mechanism arranged on the bearing frame; the electric lifting mechanism comprises a speed reducer, a motor detachably arranged on the speed reducer, a screw rod piece connected with the output end of the speed reducer, and a first nut which is sleeved on the outer side of the screw rod piece in a threaded manner and is arranged on the support frame; the speed reducer comprises a speed reducer shell, a plurality of fixing plates arranged on the outer side of the speed reducer shell and a plurality of fixing pieces matched with the fixing plates for use respectively, the fixing pieces are used for fixing the fixing plates on the bearing frame, and the motor is detachably connected to the speed reducer shell; during actual manufacturing, the support frame, bear the frame, electric lift mechanism assembles the completion alone, then fixes electric lift mechanism's reduction gear on bearing the frame, fixes first nut on the support frame, realizes the installation assembly of electric lift table, promotes installation effectiveness and dismantlement efficiency.)

1. An electric lifting table comprises a bearing frame, a table top arranged on the bearing frame, a supporting frame matched with the bearing frame and an electric lifting mechanism arranged on the bearing frame, wherein the electric lifting mechanism is used for driving the bearing frame to automatically ascend or descend relative to the supporting frame; the method is characterized in that: the electric lifting mechanism comprises a speed reducer, a motor, a screw rod piece and a first nut, wherein the motor is detachably arranged on the speed reducer, the screw rod piece is connected with the output end of the speed reducer, the first nut is sleeved on the outer side of the screw rod piece in a threaded manner and is arranged on the support frame, and the motor drives the screw rod piece to rotate through the speed reducer; the reduction gear includes the speed reduction casing, set up in a plurality of fixed plates in the speed reduction casing outside, respectively with a plurality of mountings of a plurality of fixed plate cooperation use, a plurality of fixed plates set up around the central axis of speed reduction casing, the mounting is used for fixing the fixed plate and bears the frame on, the connection can be dismantled on the speed reduction casing to the motor.

2. The motorized lift table of claim 1, wherein: the electric lifting mechanism further comprises a protection box detachably connected with the bearing frame, the speed reducer and the motor are both located in the protection box, the fixing piece is used for fixing the fixing plate on the protection box, and a shock pad is arranged between the fixing plate and the protection box.

3. The motorized lift table of claim 2, wherein: the fixing plate is provided with a clamping hole, the clamping hole penetrates through the outer side face of the fixing plate, and the shock pad is extruded into the clamping hole from an opening of the clamping hole, which penetrates through the outer side face of the fixing plate; the shock pad has annular blind groove, and annular blind groove is established from the lateral surface of shock pad and is formed by the concave, and annular blind groove sets up around the central axis of shock pad, and the fixed plate card is gone into in the annular blind groove.

4. An electrically powered lift table as defined in claim 3 wherein: the fixing piece comprises a rod body part and a cover head part connected with the rod body part, and the outer diameter of the rod body part is smaller than that of the cover head part; the shock pad has the through-hole that runs through the shock pad, and the through-hole extends the setting along the central axis of shock pad, and the through-hole is used for holding establishes the pole somatic part, and the terminal surface of shock pad one end is used for contradicting the protection box, and the caping portion is used for conflicting the terminal surface of the shock pad other end.

5. The motorized lift table of claim 2, wherein: the reduction gear is still including rotating the axle body spare that sets up in the reduction casing, set up in the worm wheel of axle body spare, with the worm wheel meshing and be located the worm of reduction casing, the worm sets up in the output shaft of motor, the axle body spare is equipped with the non-round hole, the reduction casing is equipped with first perforation, the protection box is equipped with the second perforation, the first perforation of lead screw spare warp, the second is perforated and is connected axle body spare, the lead screw spare is equipped with the non-circle portion of holding locating in the non-round hole.

6. An electrically powered lift table as defined in claim 5 wherein: the non-circular hole penetrates through the shaft piece, the screw rod piece comprises a threaded part, the threaded part is connected with the non-circular part, the outer diameter of the threaded part is larger than that of the non-circular part, and a first nut is sleeved on the outer side of the threaded part in a threaded manner; the one end spiro union cover that the non-circle portion kept away from the silk thread portion is equipped with the second nut, and the axis body spare centre gripping is between silk thread portion and second nut.

7. The motorized lift table of claim 6, wherein: the speed reducer shell comprises a bottom shell, a middle shell and an upper cover, wherein the fixed plate is arranged on the bottom shell, the middle shell is provided with a reference flat plate, and the motor is detachably connected to the reference flat plate; the two ends of the shaft piece are sleeved with first bearings which are respectively arranged on the bottom shell and the upper cover, and the bottom shell and the upper cover are provided with first blind holes for accommodating the first bearings; the middle part of the shaft piece is sleeved with a second bearing, the worm wheel is positioned in the middle part of the shaft piece, and the middle shell is provided with a second blind hole for accommodating the second bearing; the bottom surface of the blind hole is used for abutting against and stopping the bearing.

8. The motorized lift table of claim 1, wherein: the support frame comprises a transverse plate, an outer pipe piece and an inner pipe piece, wherein the outer pipe piece and the inner pipe piece are arranged in the middle of the transverse plate; the bearing frame is connected with a middle pipe fitting which is arranged between the outer pipe fitting and the inner pipe fitting in a sliding mode, and the middle pipe fitting is sleeved on the outer side of the wire rod piece; the one end that the diaphragm was kept away from to pipe fitting including first nut installation setting, the one end rotation that the reduction gear was kept away from to lead screw spare is provided with the slider, and the slider slides and sets up in the pipe fitting including.

9. The motorized lift table of claim 8, wherein: the cross section of the pipe fitting is in a rectangular ring shape, a first noise reduction piece is arranged on the inner side of one end, away from the transverse plate, of the outer pipe fitting, the first noise reduction piece is arranged around the middle pipe fitting, and the first noise reduction piece is used for abutting against the outer side face of the middle pipe fitting; the one end that the reduction gear was kept away from to well pipe fitting is equipped with the second noise reduction piece, and the second noise reduction piece encircles well pipe fitting setting, and the second noise reduction piece is equipped with and contradicts on the medial surface of outer tube fitting.

10. The motorized lift table of claim 1, wherein: the table board comprises a table board, a plurality of supporting frames, a plurality of electric lifting mechanisms, a plurality of supporting frames and a plurality of protective boxes, wherein the supporting frames are arranged on the table board in a sliding mode; the bracket or/and the desk plate are/is provided with a manual control box, and a user controls the two electric lifting mechanisms to synchronously operate through the manual control box.

Technical Field

The invention relates to the technical field of electric tables, and particularly discloses an electric lifting table.

Background

Along with the progress of science and technology, intelligent house product has become one of more and more families' furniture, for example, can adjust the electric lift table of table height is the one of intelligent house, in the use of electric lift table, with the help of the electric lift mechanism drive table of electric lift table rise or descend for the table height can satisfy multiple demand.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the electric lifting table, the support frame, the bearing frame and the electric lifting mechanism are independently assembled, then the reducer of the electric lifting mechanism is fixed on the bearing frame, and the first nut is fixed on the support frame, so that the electric lifting table is assembled, the assembling efficiency and the disassembling efficiency are improved, the manufacturing efficiency of the electric lifting table is improved, and the manufacturing cost is reduced.

In order to achieve the above purpose, the electric lifting table of the present invention comprises a bearing frame, a table top arranged on the bearing frame, a supporting frame matched with the bearing frame, and an electric lifting mechanism arranged on the bearing frame, wherein the electric lifting mechanism is used for driving the bearing frame to automatically ascend or descend relative to the supporting frame; the electric lifting mechanism comprises a speed reducer, a motor, a screw rod piece and a first nut, wherein the motor is detachably arranged on the speed reducer, the screw rod piece is connected with the output end of the speed reducer, the first nut is sleeved on the outer side of the screw rod piece in a threaded manner and is arranged on the support frame, and the motor drives the screw rod piece to rotate through the speed reducer; the reduction gear includes the speed reduction casing, set up in a plurality of fixed plates in the speed reduction casing outside, respectively with a plurality of mountings of a plurality of fixed plate cooperation use, a plurality of fixed plates set up around the central axis of speed reduction casing, the mounting is used for fixing the fixed plate and bears the frame on, the connection can be dismantled on the speed reduction casing to the motor.

The electric lifting mechanism further comprises a protection box detachably connected with the bearing frame, the speed reducer and the motor are both located in the protection box, the fixing piece is used for fixing the fixing plate on the protection box, and a shock pad is arranged between the fixing plate and the protection box.

The damping pad is extruded into the clamping hole from an opening of the clamping hole penetrating through the outer side surface of the fixing plate; the shock pad has annular blind groove, and annular blind groove is established from the lateral surface of shock pad and is formed by the concave, and annular blind groove sets up around the central axis of shock pad, and the fixed plate card is gone into in the annular blind groove.

The fixing piece comprises a rod body part and a cover head part connected with the rod body part, and the outer diameter of the rod body part is smaller than that of the cover head part; the shock pad has the through-hole that runs through the shock pad, and the through-hole extends the setting along the central axis of shock pad, and the through-hole is used for holding establishes the pole somatic part, and the terminal surface of shock pad one end is used for contradicting the protection box, and the caping portion is used for conflicting the terminal surface of the shock pad other end.

The speed reducer further comprises a shaft body part arranged in the speed reducer casing in a rotating mode, a worm wheel arranged on the shaft body part, and a worm meshed with the worm wheel and located in the speed reducer casing, the worm is arranged on an output shaft of the motor, the shaft body part is provided with a non-circular hole, the speed reducer casing is provided with a first through hole, the protection box is provided with a second through hole, the screw rod part penetrates through the first through hole and the second through hole to be connected with the shaft body part, and the screw rod part is provided with a non-circular portion arranged in the non.

The non-circular hole penetrates through the shaft piece, the screw rod piece comprises a threaded part, the threaded part is connected with the non-circular part, the outer diameter of the threaded part is larger than that of the non-circular part, and the first nut is sleeved on the outer side of the threaded part in a threaded manner; the one end spiro union cover that the non-circle portion kept away from the silk thread portion is equipped with the second nut, and the axis body spare centre gripping is between silk thread portion and second nut.

The speed reducer shell comprises a bottom shell, a middle shell and an upper cover, wherein the fixed plate is arranged on the bottom shell, the middle shell is provided with a reference flat plate, and the motor is detachably connected to the reference flat plate; the two ends of the shaft piece are sleeved with first bearings which are respectively arranged on the bottom shell and the upper cover, and the bottom shell and the upper cover are provided with first blind holes for accommodating the first bearings; the middle part of the shaft piece is sleeved with a second bearing, the worm wheel is positioned in the middle part of the shaft piece, and the middle shell is provided with a second blind hole for accommodating the second bearing; the bottom surface of the blind hole is used for abutting against and stopping the bearing.

The support frame comprises a transverse plate, an outer pipe piece and an inner pipe piece, wherein the outer pipe piece and the inner pipe piece are arranged in the middle of the transverse plate; the bearing frame is connected with a middle pipe fitting which is arranged between the outer pipe fitting and the inner pipe fitting in a sliding mode, and the middle pipe fitting is sleeved on the outer side of the wire rod piece; the one end that the diaphragm was kept away from to pipe fitting including first nut installation setting, the one end rotation that the reduction gear was kept away from to lead screw spare is provided with the slider, and the slider slides and sets up in the pipe fitting including.

The cross section of the pipe fitting is in a rectangular ring shape, a first noise reduction piece is arranged on the inner side of one end, away from the transverse plate, of the outer pipe fitting, the first noise reduction piece is arranged around the middle pipe fitting, and the first noise reduction piece is used for abutting against the outer side face of the middle pipe fitting; the one end that the reduction gear was kept away from to well pipe fitting is equipped with the second noise reduction piece, and the second noise reduction piece encircles well pipe fitting setting, and the second noise reduction piece is equipped with and contradicts on the medial surface of outer tube fitting.

The table board comprises a table board, a plurality of supporting frames, a plurality of electric lifting mechanisms, a plurality of protective boxes and a plurality of supporting frames, wherein the number of the supporting frames and the number of the electric lifting mechanisms are two, the supporting frames comprise two brackets and supporting rods for connecting the two brackets, the brackets and the supporting rods are arranged in a sliding mode, the protective boxes of the two electric lifting mechanisms are detachably arranged on the two brackets respectively, two ends of the table board are arranged on the two brackets respectively, and the two brackets are arranged; the bracket or/and the desk plate are/is provided with a manual control box, and a user controls the two electric lifting mechanisms to synchronously operate through the manual control box.

The invention has the beneficial effects that: during actual manufacturing, the support frame, bear the frame, electric lift mechanism assembles the completion alone, then fixes electric lift mechanism's reduction gear on bearing the frame, fixes first nut on the support frame, realizes the installation assembly of electric lift table, promotes installation effectiveness and dismantlement efficiency, promotes the manufacturing efficiency of electric lift table, reduces manufacturing cost.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a three-dimensional structure of a hidden desk plate and a hand controller according to the present invention;

FIG. 3 is an exploded view of the supporting frame, the loading frame and the electric lifting mechanism of the present invention;

FIG. 4 is a schematic perspective view of the reducer, the motor, the screw member, the first nut, and the slider according to the present invention;

fig. 5 is an exploded structural schematic view of the reducer, the motor, the wire rod piece, the first nut and the sliding block of the present invention.

The reference numerals include:

1-bearing frame 2-table board 3-support frame

4-electric lifting mechanism 5-speed reducer 6-motor

7-screw rod 8-first nut 9-speed reduction casing

11-fixed plate 12-fixed piece 13-protective box

14-shock pad 15-clamping hole 16-annular blind groove

17-through hole 18-shaft member 19-worm wheel

21-worm 22-noncircular hole 23-second nut

24-bottom shell 25-middle shell 26-upper cover

27-first bearing 28-second bearing 29-transverse plate

31-outer tube 32-inner tube 33-middle tube

34-slide block 35-first noise reduction member 36-second noise reduction member

37-manual control box 38-bracket 39-stay bar.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

Referring to fig. 1 to 5, the electric lifting table of the present invention includes a supporting frame 1, a table 2 fixedly installed on a top end of the supporting frame 1, a supporting frame 3 used in cooperation with the supporting frame 1, and an electric lifting mechanism 4 installed on the supporting frame 1, wherein the electric lifting mechanism 4 is used for driving the supporting frame 1 to automatically ascend or descend relative to the supporting frame 3, and the supporting frame 3 is connected with the table 2 to automatically ascend or descend, so as to automatically adjust the height of the table 2 without manually adjusting the height of the table 2 by a user.

The electric lifting mechanism 4 comprises a speed reducer 5, a motor 6 which is detachably arranged on the outer side of the speed reducer 5, a screw rod piece 7 connected with the output end of the speed reducer 5, and a first nut 8 which is sleeved on the outer side of the screw rod piece 7 through a screw joint and is arranged on the support frame 3, wherein the motor 6 drives the screw rod piece 7 to rotate through the speed reducer 5.

In this embodiment, motor 6 direct fixed mounting constructs an independent unit on the reduction gear 5 outside, need not motor 6 and bears 1 secondary installation, only need to bear the reduction gear 5 and install and to accomplish the installation of reduction gear 5 and take motor 6 on bearing 1.

The speed reducer 5 comprises a speed reducer casing 9, a plurality of fixing plates 11 arranged on the outer side of the speed reducer casing 9, and a plurality of fixing pieces 12 respectively matched with the fixing plates 11 for use, wherein the fixing plates 11 are arranged around the central axis of the speed reducer casing 9, the fixing pieces 12 are used for fixing the fixing plates 11 on the bearing frame 1, and the motor 6 is detachably connected to the speed reducer casing 9.

The fixing pieces 12 and the fixing plates 11 are in one-to-one correspondence, and the plurality of fixing plates 11 are arranged, so that different circumferential positions of the speed reduction casing 9 are fixed on the bearing frame 1, the balance of stress of the speed reduction casing 9 is ensured, and the situation that the bearing frame 1 is rocked relatively due to the fact that the stress of the speed reduction casing 9 is uneven is avoided. Preferably, the fixing plates 11 are coplanar, in this embodiment, the number of the fixing plates 11 is three, and the connecting line between the fixing elements 12 of the three fixing plates 11 is substantially triangular, so as to ensure that the reduction casing 9 is stably mounted on the loading frame 1 by the principle that the triangle has stability.

During actual manufacturing, support frame 3, bear frame 1, electric lift mechanism 4 and assemble the completion alone, then fix the reduction gear 5 of electric lift mechanism 4 on bearing frame 1, fix first nut 8 on support frame 3, realize the installation assembly of electric lift table, promote installation effectiveness and dismantlement efficiency, promote the manufacturing efficiency of electric lift table, reduce manufacturing cost.

The electric lifting mechanism 4 further comprises a protection box 13 detachably connected with the bearing frame 1, the protection box 13 is a hollow cuboid approximately, the speed reducer 5 and the motor 6 are both located in the protection box 13, the fixing piece 12 is used for fixing the fixing plate 11 on the protection box 13, and a shock pad 14 is arranged between the fixing plate 11 and the protection box 13. The protective box 13 is used for installing and fixing on the bearing frame 1, and through the arrangement of the protective box 13, compared with the structure which is processed on the speed reducing machine shell 9 with limited size and is installed and matched with the bearing frame 1, the convenience of installing the electric lifting mechanism 4 and the bearing frame 1 is improved, and the processing difficulty is reduced. At the same time, the reduction gear 5 and the motor 6 are protected by means of a protective box 13.

By additionally arranging the shock absorbing pad 14 between the fixing plate 11 and the protection box 13, the shock absorbing pad 14 absorbs external shock transmitted to the protection box 13, and compared with the direct contact of the speed reducer 5 with the protection box 13, the direct contact prevents the external shock from being transmitted to the speed reducer 5 through the protection box 13 to cause poor transmission of the speed reducer 5. Preferably, the cushion 14 is made of an elastic material, for example, the cushion 14 is made of silicone.

The fixing plate 11 is provided with a clamping hole 15, the clamping hole 15 penetrates through the outer side surface of the fixing plate 11, and the shock pad 14 penetrates through an opening in the outer side surface of the fixing plate 11 from the clamping hole 15 and is extruded into the clamping hole 15; the shock pad 14 is provided with an annular blind groove 16, the annular blind groove 16 is formed by being concavely arranged on the outer side surface of the shock pad 14, the annular blind groove 16 is arranged around the central axis of the shock pad 14, and the fixing plate 11 is clamped in the annular blind groove 16.

Through the arrangement of the clamping hole 15 and the annular blind groove 16, the shock absorption pad 14 can be conveniently and rapidly and accurately installed at the correct position on the fixed plate 11, and the shock absorption pad 14 and the fixed plate 11 can be conveniently detached. By means of the characteristics of the annular blind groove 16, the alignment time of the shock pad 14 and the fixed plate 11 is shortened, the fixed plate 11 is clamped by the inner side walls of the upper side and the lower side of the annular blind groove 16, and the shock pad 14 is stably clamped on the fixed plate 11.

The fixing piece 12 comprises a rod body part and a cap part connected with the rod body part, and the outer diameter of the rod body part is smaller than that of the cap part; the shock pad 14 has the through-hole 17 that runs through shock pad 14, and the through-hole 17 extends the setting along the central axis of shock pad 14, and through-hole 17 is used for holding the pole body portion, and the terminal surface of shock pad 14 one end is used for contradicting protection box 13, and the caping portion is used for contradicting the terminal surface of the shock pad 14 other end.

Through the arrangement of the through hole 17, the rod body part is used for stopping and abutting against the inner hole surface of the through hole 17, so that the shock absorption pad 14 is ensured to be stably positioned on the fixed plate 11, and the shock absorption defect caused by the movement of the shock absorption pad 14 relative to the fixed plate 11 is avoided. In addition, through the structural design of the shock pad 14, the head part is prevented from directly contacting the fixing plate 11, so that the shock pad 14 can absorb external shock and the head part and the fixing plate 11 can be prevented from being damaged by relative movement due to direct contact.

The speed reducer 5 further comprises a shaft body part 18 rotatably arranged in the speed reducer casing 9, a worm wheel 19 arranged on the shaft body part 18, a worm 21 meshed with the worm wheel 19 and located in the speed reducer casing 9, the shaft body part 18 and the worm wheel 19 are of an integrated structure, the worm 21 is arranged on an output shaft of the motor 6, the output shaft of the motor 6 and the worm 21 are of an integrated structure, the shaft body part 18 is provided with a non-circular hole 22, the speed reducer casing 9 is provided with a first through hole, the protection box 13 is provided with a second through hole, the screw rod part 7 penetrates through the first through hole and the second through hole to be connected with the shaft body part 18, and the screw rod part 7 is provided with a non-circular.

After the screw rod 7 and the shaft 18 are assembled, the inner hole surface of the non-circular hole 22 is used for stopping and abutting against the non-circular part, so that the screw rod 7 is prevented from rotating relative to the shaft 18 to cause poor transmission of the speed reducer 5. In this embodiment, the noncircular hole 22 is a regular hexagonal hole, and the noncircular portion is a regular hexagonal portion matching the regular hexagonal hole, so that the circumferential weight balance of the screw member 7 and the shaft member 18 is ensured, the rotational inertia of the shaft member 18 and the screw member 7 is reduced, and the vibration of the speed reducer 5 during rotation is reduced. Of course, the non-circular hole 22 may be a regular triangle hole, a regular square hole, etc. according to actual requirements.

The noncircular hole 22 penetrates through the shaft piece 18, the screw rod piece 7 comprises a threaded part, the threaded part is connected with the noncircular part, the outer diameter of the threaded part is larger than that of the noncircular part, and the first nut 8 is sleeved on the outer side of the threaded part in a threaded manner; one end of the non-circular part far away from the thread part is in threaded connection with a second nut 23 in a sleeved mode, and the shaft body part 18 is clamped between the thread part and the second nut 23. During actual assembly, install reduction gear 5 together, then fix the motor 6 installation on reduction gear 5, later pack into non-round hole 22 with lead screw spare 7 again in, later pin second nut 23 again, via the cooperation setting of thread portion, non-circle portion, second nut 23 for axle spare 18 can be installed fast firmly with lead screw spare 7 and be fixed together, promote electric lift mechanism 4's installation effectiveness.

The speed reducer casing 9 comprises a bottom casing 24, a middle casing 25 and an upper cover 26, the fixing plate 11 is arranged on the bottom casing 24, the middle casing 25 is provided with a reference flat plate, and the motor 6 is detachably connected to the reference flat plate; through the setting of benchmark flat board, ensure that motor 6 installs required position on reduction housing 9 fast accurately, promote the installation effectiveness and the installation yield of motor 6.

The two ends of the shaft member 18 are sleeved with first bearings 27 respectively arranged on the bottom shell 24 and the upper cover 26, and the bottom shell 24 and the upper cover 26 are provided with first blind holes for accommodating the first bearings 27; the middle part of the shaft member 18 is sleeved with a second bearing 28, the worm wheel 19 is positioned in the middle part of the shaft member 18, and the middle shell 25 is provided with a second blind hole for accommodating the second bearing 28; the bottom surface of the blind hole is used for abutting against and stopping the bearing. The bearing is blocked by the bottom surface of the blind hole in an abutting mode, and the bearing is ensured to be installed at a required position quickly and accurately.

The support frame 3 comprises a transverse plate 29, an outer pipe 31 arranged in the middle of the transverse plate 29 and an inner pipe 32, wherein the inner pipe 32 is positioned in the outer pipe 31; the bearing frame 1 is connected with a middle pipe 33 which is arranged between the outer pipe 31 and the inner pipe 32 in a sliding way, and the middle pipe 33 is sleeved outside the wire rod piece 7; the first nut 8 is installed and arranged at one end, far away from the transverse plate 29, of the inner pipe fitting 32, the sliding block 34 is rotatably arranged at one end, far away from the speed reducer 5, of the screw rod piece 7, and the sliding block 34 is arranged in the inner pipe fitting 32 in a sliding mode. Two anti-skidding blocks 34 are arranged at the lower end of the transverse plate 29, the anti-skidding blocks 34 are made of silica gel, and the anti-skidding blocks 34 are used for being pressed on the ground.

Through the setting of slider 34, keep away from the one end of reduction gear 5 with screw member 7 and spacing in inner tube 32, avoid screw member 7 to lead to first nut 8 to damage relative first nut 8 beat, prolong the life of first nut 8. The lower end of the protective wire rod piece 7 is covered by the inner pipe piece 32, the upper end of the protective wire rod piece 7 is covered by the middle pipe piece 33, and the section difference gap between the protective transverse plate 29 and the middle pipe piece 33 is covered by the outer pipe piece 31, so that the using performance of the electric lifting table is ensured.

The cross section of the pipe fitting is in a rectangular ring shape, the outer pipe fitting 31, the middle pipe fitting 33 and the inner pipe fitting 32 are prevented from rotating relatively by means of the non-circular structure of the rectangular ring, the three pipe fittings are stably sleeved together, a first noise reduction piece 35 is arranged on the inner side of one end, away from the transverse plate 29, of the outer pipe fitting 31, the first noise reduction piece 35 is arranged around the middle pipe fitting 33, and the first noise reduction piece 35 is used for abutting against the outer side face of the middle pipe fitting 33; one end of the middle pipe fitting 33, which is far away from the speed reducer 5, is provided with a second noise reduction piece 36, the second noise reduction piece 36 is arranged around the middle pipe fitting 33, and the second noise reduction piece 36 is provided with an inner side surface which is abutted against the outer pipe fitting 31.

Through the arrangement of the noise reduction piece, on one hand, the friction noise generated by relative sliding of the outer pipe piece 31 and the middle pipe piece 33 is reduced, and on the other hand, the middle pipe piece 33 is prevented from being damaged due to relative deflection. Preferably, the noise reduction member is made of an elastic material, for example, the noise reduction member is made of silicone. Preferably, the noise reduction piece is provided with a guide strip, and the guide strip extends along the length direction of the pipe fitting.

The number of the support frames 3 and the number of the electric lifting mechanisms 4 are two, the bearing frame 1 comprises two brackets 38 and a support rod 39 for connecting the two brackets 38, the brackets 38 and the support rod 39 are arranged in a sliding manner, the protection boxes 13 of the two electric lifting mechanisms 4 are respectively detachably arranged on the two brackets 38, two ends of the table board 2 are respectively arranged on the two brackets 38, and the two brackets 38 are respectively arranged with the two support frames 3 in a lifting manner. According to the size of the table board 2, a user can slide the brackets 38 and the stay bars 39 to change the distance between the two brackets 38, so that the two brackets 38 of the bearing frame 1 can be stably installed at both ends of the table boards 2 with various sizes.

The bracket 38 or/and the table 2 is/are provided with a manual control box 37, and a user operates the two electric lifting mechanisms 4 to synchronously operate through the manual control box 37. In actual use, the user can automatically adjust the height of the table plate 2 of the electric lifting table by triggering the manual control box 37. Preferably, the manual control box 37 is installed at the lower end of the table 2, and the manual control box 37 is protected by the table 2, so that the probability that the manual control box 37 is damaged due to collision is reduced.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.