CN214594760U

CN214594760U - Electric lifting table

Info

Publication number: CN214594760U
Application number: CN202120116662.0U
Authority: CN
Inventors: 项乐宏; 蒋领辉; 陈旭峰
Original assignee: Loctek Ergonomic Technology Co Ltd
Current assignee: Loctek Ergonomic Technology Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-11-05
Anticipated expiration: 2031-01-15

Abstract

The utility model discloses an electric lifting table, which comprises two lifting columns, wherein a linear driving mechanism is connected in each lifting column, the linear driving mechanism comprises a lead screw, a transmission nut, an upper limiting part and a lower limiting part, and the transmission nut reciprocates between the upper limiting part and the lower limiting part; the driving gear is in transmission connection with the driving motor; two clutch devices: the first clutch device and the second clutch device are respectively connected to two ends of the driving gear, and the outer end of the first clutch device and the outer end of the second clutch device are respectively in transmission connection with the screw rods in the two lifting upright columns; the clutch device is used for transmitting the torque of the driving motor under the rated torque, driving the screw rods in the two lifting upright columns to rotate, and the lifting upright columns perform lifting action. The electric lifting table is low in production cost, the lifting operation is not prone to error, and the defect of control failure caused by error of program software can be effectively overcome.

Description

Electric lifting table

Technical Field

The utility model relates to a furniture equipment technical field specifically says that an electric lift table.

Background

The electric lifting table is an office table with adjustable height, and the height can be adjusted according to the height, sitting posture and standing posture of a person. The structure of the electric lifting table generally comprises a table plate, a cross beam, a base and a lifting stand column, wherein a motor is arranged on the cross beam, the motor drives a transmission rod in the cross beam to rotate, and two ends of the transmission rod are in transmission connection with linear lifting mechanisms in the stand column respectively and are used for driving the linear lifting mechanisms in the stand column to rotate, so that the stand column is lifted. The height adjustment of the electric lifting table generally controls the action of a motor by means of additional control hardware and software to realize the lifting adjustment of the electric lifting table, and the additional control hardware and software generally refer to a control panel and a circuit control program positioned in the control panel; therefore, the production cost is high, the software program is easy to make mistakes, the control is invalid, and the upright column continues to rise when rising to the highest warning position or continues to fall when falling to the lowest position.

In order to save cost and avoid control failure caused by software program error, people remove control hardware and software, and adopt that a lower travel switch and an upper travel switch are sequentially arranged in an upright column from bottom to top along the height direction of the upright column, and two travel switches are utilized to limit the lifting travel of the upright column. For example, the chinese prior application, which is a name of the present applicant and is CN209058258U, of which publication number is CN209058258U, discloses that a lower travel switch and an upper travel switch are sequentially arranged in the table leg from bottom to top along the height direction of the table leg, and both the lower travel switch and the upper travel switch are electrically connected with a control circuit of a driver through a wire; when the table legs descend to the lowest position, the lower travel switch is triggered, the control circuit of the driver is controlled to be disconnected by the lower travel switch, and the table legs stop descending; when the table legs rise to the highest position, the upper travel switch is triggered, the control circuit of the driver is controlled to be disconnected by the upper travel switch, and the table legs stop rising. However, in the electric lifting table with the structure, the upper travel switch and the lower travel switch are connected with the control circuit of the driver through the wires, and if the wires are aged or damaged due to extrusion, the upper travel switch or the lower travel switch fails, and the defect of control failure is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the defect of above prior art, provide a low in production cost, and lift operation is difficult for makeing mistakes to can effectively avoid causing the electronic lift table of control failure defect because of the program software makes mistakes.

The technical solution of the utility model is to provide an electric lift table with the following structure: it comprises

The linear driving mechanism comprises a screw rod which is rotatably connected in the lifting stand column, a transmission nut which is in threaded connection with the screw rod, an upper limiting part and a lower limiting part, wherein the transmission nut reciprocates between the upper limiting part and the lower limiting part;

the driving gear is in transmission connection with the driving motor;

two clutch devices: the first clutch device and the second clutch device are respectively connected to two ends of the driving gear, and the outer end of the first clutch device and the outer end of the second clutch device are respectively in transmission connection with the screw rods in the two lifting upright columns;

the clutch device is used for transmitting the torque of the driving motor under the rated torque, driving the screw rods in the two lifting upright columns to rotate, and the lifting upright columns perform lifting action; and when the transmission nut abuts against the upper limiting part or the lower limiting part to increase the torque of the driving motor, the clutch device is disengaged from transmission, and the lifting upright post stops lifting action.

After the structure more than adopting, the utility model relates to an electric lift table compares with prior art, has following advantage: the electric lifting table is provided with an upper limiting part and a lower limiting part in a linear driving mechanism of a lifting upright post, wherein the upper limiting part and the lower limiting part are used for being abutted by a transmission nut when a screw rod rotates, or the upper limiting part and the lower limiting part are used for limiting the movement stroke of the transmission nut; the electric lifting table is characterized in that the two ends of the driving gear are respectively provided with a clutch device, the clutch devices can transmit the torque of the driving motor under the rated torque, but the clutch devices are disengaged from the transmission or slip under the condition that the torque of the driving motor is suddenly increased; that is, under the condition that the driving motor drives the driving gear to normally rotate, the clutch device drives the screw rods in the two lifting upright columns to rotate, so that the lifting upright columns are lifted; when the transmission nut abuts against the upper limiting part or the lower limiting part, the lifting upright post stops lifting, but the driving motor rotates, so that the instant torque of the driving motor is increased, the clutch device is disengaged from transmission or slips at the moment, and the torque of the driving motor cannot be transmitted to a screw rod of the lifting upright post, so that the linear driving mechanism is protected; therefore, the electric lifting table adopts the clutch device and the cooperation of the upper limiting piece and the lower limiting piece to protect the linear driving mechanism and the driving motor when the lifting upright column rises to the highest point and falls to the lowest point; the cost of adopting extra hardware and software program control is avoided, and control failure caused by software program errors or control defects of the program can be effectively avoided. Therefore, the electric lifting table is low in production cost, not prone to error in lifting operation and high in safety.

Preferably, the driving motor is connected with a hollow gear seat with two open ends, and the driving gear is rotatably connected in the gear seat; the lifting upright post is connected with a mounting plate, the gear seat is connected to the mounting plate, and the mounting position of the gear seat on the mounting plate can be adjusted. The mounting plate is adopted to fix the gear seat and the driving motor, and the mounting position of the gear seat on the mounting plate can be adjusted, so that the gear seat and the driving motor can be mounted more conveniently, and the mounting position of the adjustable gear seat enables the axis of the gear seat, the axis of the clutch device and the axis of the input end of the linear driving mechanism to be on the same axis, so that the transmission efficiency is effectively improved.

Preferably, the first clutch device comprises a first rotating member in transmission connection with the first end of the driving gear and a first transmission member in transmission connection with the lifting upright post, a first torsion spring is sleeved on the outer side wall of the first rotating member, and the inner wall of an inner ring of the first torsion spring is attached to the outer side wall of the first rotating member; the first torsion spring is arranged in the first accommodating cavity and is in transmission connection with the first transmission member. The inner wall of the inner ring of the first torsion spring is attached to the outer side wall of the first rotating piece, so that rotating friction force exists between the inner wall of the inner ring of the first torsion spring and the outer side wall of the first rotating piece, and the friction force can enable the first rotating piece to rotate along with the first rotating piece, so that the clutch device can realize the effect of transmitting the torque of the driving motor; when the instantaneous torque of the drive nut and the upper limit part or the lower limit part which abuts against the drive motor is increased, the drive gear drives the first rotating part to rotate so as to overcome the friction force of the inner wall of the inner ring of the first torsion spring, so that the first rotating part and the first driving part are slipped or separated from the drive, the situation that the drive motor continuously transmits torque to the screw rod of the lifting upright column to damage the screw rod is avoided, and the internal damage of the drive motor is also avoided.

Preferably, the second clutch device comprises a second rotating part in transmission connection with the second end of the driving gear and a second transmission part in transmission connection with the other lifting upright column, a second torsion spring is sleeved on the outer side wall of the second rotating part, and the inner wall of an inner ring of the second torsion spring is attached to the outer side wall of the second rotating part; the one end that the second driving medium is close to the second rotation piece is equipped with second holding chamber, but the second torsional spring setting is connected with the second driving medium transmission at second holding intracavity and second torsional spring. The inner wall of the inner ring of the second torsion spring is attached to the outer side wall of the second rotating part, so that rotating friction force exists between the inner wall of the inner ring of the second torsion spring and the outer side wall of the second rotating part, and the friction force can enable the second transmission part to rotate along with the second rotating part, so that the clutch device can realize the effect of transmitting the torque of the driving motor; when the moment torque of the drive nut and the upper limit part or the lower limit part against the drive motor is increased, the drive gear drives the second rotating part to rotate so as to overcome the friction force of the inner wall of the inner ring of the second torsion spring, so that the second rotating part and the second transmission part are slipped or separated from the drive, the situation that the drive motor continues to transmit torque to the screw rod of the lifting upright post so as to damage the screw rod is avoided, and the internal damage of the drive motor is also avoided.

Preferably, the first transmission member is provided with a first notch communicated with the first accommodating cavity, the two torsion arms of the first torsion spring are arranged in the first notch, and a rotating gap is formed in the first notch, so that when the first torsion spring rotates, the first transmission member can be driven to rotate by the two torsion arms. The two torsion arms of the first torsion spring can drive the first transmission piece to rotate, so that the transmission effect is realized; but when the bearing of electric lift table is great, and driving motor stop work, linear actuating mechanism in the lift stand can take place to shrink because of great axial pressure effect down, first transmission piece passive rotation this moment, because of two torque arms of first torsional spring have the rotation clearance in first breach, so the first transmission piece of passive rotation can not directly exert torsion to first transmission piece, but act on first torsional spring earlier, make the external diameter of first torsional spring diminish and hold tightly first transmission piece, realize the auto-lock function, avoid the first transmission piece of passive rotation directly to exert torsion for drive gear, alleviate drive gear's atress.

Preferably, the second transmission part is provided with a second notch communicated with the second accommodating cavity, the two torsion arms of the second torsion spring are arranged in the second notch and have a rotating gap in the second notch, and when the second torsion spring rotates, the two torsion arms can drive the second transmission part to rotate. Two torsion arms of the second torsion spring can drive the second transmission piece to rotate, so that the transmission effect is realized; but the bearing when electric lift table is great, and driving motor stop work, linear actuating mechanism in the lift stand can take place the shrink because of great axial pressure effect down, the passive rotation of second driving medium this moment, two jibs because of the second torsional spring have the rotation clearance in the second breach, so the passive rotation second driving medium can not directly rotate the piece and exert torsion to the second, but act on the second torsional spring earlier, make the external diameter of second torsional spring diminish and hold the second and rotate the piece tightly, realize self-locking function, avoid the passive rotation second driving medium directly to exert torsion for drive gear, alleviate drive gear's atress.

Preferably, the gear seat is provided with a first connecting part, the first connecting part comprises two first connecting grooves arranged side by side, and a locking nut is in clearance fit in each first connecting groove; the mounting plate is provided with a second connecting part, the second connecting part comprises two first connecting holes arranged on the motor mounting plate, and the two first connecting holes are in one-to-one correspondence with the two first connecting grooves; and each first connecting hole is internally connected with a locking screw, and the free end of each locking screw penetrates through the first connecting groove and is in threaded connection with the locking nut in the first connecting groove. Through wearing to establish locking screw in two first connecting holes, and make locking screw's free end wear to establish in first connecting groove and can fix gear seat and driving motor with the lock nut threaded connection of first connecting groove, when the mounted position of gear seat, only need unscrew locking screw, then adjust the upper and lower angle of gear seat one end, the axis that makes drive gear's axis and clutch's axis and linear drive mechanism input is on same axis, then tighten locking screw can again, thereby guarantee that driven concentricity makes transmission efficiency obtain effectively improving.

Preferably, the first connecting part further comprises a second connecting groove, the second connecting groove is arranged on the side wall of the gear seat below the two first connecting grooves, and a locking nut is in clearance fit in the second connecting groove; and a second connecting hole corresponding to the second connecting groove is formed in the mounting plate, and a locking screw capable of being in threaded connection with a locking nut in the second connecting groove is connected in the second connecting hole. The second connecting hole on this mounting panel and the cooperation installation of the second spread groove on the gear seat make the connection between gear seat and the mounting panel more firm, stable.

Preferably, the two first connecting grooves are both arranged at the upper part of the gear seat and both penetrate through the top wall of the gear seat; each first connecting groove is internally provided with a nut groove for accommodating the locking nut, and the nut groove is arranged to limit the locking nut to move axially. The locking nut is in clearance fit in the nut groove, so that the mounting position or angle of the gear seat can be conveniently adjusted.

Preferably, the second connecting groove is arranged at the lower part of the gear seat and penetrates through the bottom wall of the gear seat; and a nut groove for accommodating the locking nut is arranged in the second connecting groove and can limit the locking nut to move axially.

Preferably, the upper limiting member is an upper limiting plate connected to an upper portion of the screw rod, and the lower limiting member is a lower limiting plate connected to a lower portion of the screw rod. The upper limiting part and the lower limiting part are arranged in such a way, so that the installation is very convenient and the structure is simple.

To sum up, the utility model relates to an electric lift table's beneficial effect does: the control method avoids the adoption of extra hardware and software program control, so that the production cost is low, the lifting operation is not easy to make mistakes, and the defect of control failure caused by the mistakes of program software can be effectively avoided.

Drawings

Fig. 1 is a schematic structural view of an electric lifting table of the present invention.

Fig. 2 is a schematic view of a partial structure of an electric lifting table of the present invention.

Fig. 3 is a schematic view of an assembling structure of the clutch device of the electric lifting table of the present invention.

Fig. 4 is a schematic view of an assembly structure of the clutch device of the electric lifting table of the present invention at another angle.

Fig. 5 is a schematic view of a gear seat mounting structure of an electric lifting table of the present invention.

As shown in the figure:

1. lifting upright post, 2, base, 3, linear driving mechanism, 300, lead screw, 301, transmission nut, 302, upper limit piece, 303, lower limit piece, 4, driving motor, 5, gear seat, 500, driving gear, 501, driving rod, 502, first connecting groove, 503, nut groove, 504, locking nut, 505, second connecting groove, 6, first clutch device, 600, first rotating piece, 601, first torsion spring, 602, first torsion arm, 603, first transmission piece, 604, first accommodating cavity, 605, first notch, 606, first jack, 7, second clutch device, 700, second rotating piece, 701, second torsion spring, 702, second torsion arm, 703, second transmission piece, 704, second accommodating cavity, 705, second notch, 706, second jack, 8, transmission rod component, 9, cross beam, 10, mounting plate, 1000, first connecting hole, 1001, second connecting hole, 1002. and locking the screw.

Detailed Description

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

As shown in fig. 1 to 4;

the utility model relates to an electric lifting table, which comprises a table plate (not shown in the figure), a base 2 and two lifting upright posts 1, wherein the lower ends of the two lifting upright posts 1 are connected with the base 2, the upper ends of the two lifting upright posts 1 are connected with a cross beam 9, and the top of the cross beam 9 is connected with the table plate; the electric lifting table further comprises a driving motor 4, a hollow gear seat 5 with two open ends is connected to the driving motor 4, a driving gear 500 is rotatably connected in the gear seat 5, a rotating shaft of the driving motor 4 is coaxially connected with a worm, and the worm is in transmission connection with the driving gear 500; the lifting upright post 1 is connected with a mounting plate 10, the gear seat 5 is connected on the mounting plate 10, and the mounting position of the gear seat 5 on the mounting plate 10 can be adjusted. The two lifting columns 1 are internally connected with a linear driving mechanism 3, the linear driving mechanism 3 comprises a screw 300 rotatably connected in the lifting column 1, a transmission nut 301 in threaded connection with the screw 300, an upper limiting piece 302 and a lower limiting piece 303, and the transmission nut 301 reciprocates between the upper limiting piece 302 and the lower limiting piece 303; the upper position limiting member 302 is an upper limiting plate connected to the upper portion of the screw 300, and the lower position limiting member 303 is a lower limiting plate connected to the lower portion of the screw 300. The linear driving mechanism 3 operates to drive the lifting column 1 to lift, the driving nut 301 can abut against the lower limiting member 303 when the lifting column 1 rises to the highest position, and the driving nut 301 can abut against the upper limiting member 302 when the lifting column 1 falls to the lowest position.

Referring again to fig. 2, the electric lift table further includes two clutch devices: a first clutch device 6 and a second clutch device 7, wherein the first clutch device 6 and the second clutch device 7 are respectively connected to two ends of a driving gear 500, and the driving gear 500 can transmit the torque of the driving motor 4 through the two clutch devices. The outer end of the first clutch device 6 and the outer end of the second clutch device 7 are respectively in transmission connection with the screw rods 301 in the two lifting upright posts 1; the electric lifting table further comprises a transmission rod assembly 8, and the outer end of the first clutch device 6 and the outer end of the second clutch device 7 are in transmission connection with a screw 300 in the lifting upright post 1 through the transmission rod assembly 8. The clutch device is used for transmitting the torque of the driving motor 4 under the rated torque, driving the screw rods 300 in the two lifting upright posts 1 to rotate, and enabling the lifting upright posts 1 to perform lifting action; when the driving nut 301 abuts against the upper position limiting member 302 or the lower position limiting member 303 to increase the torque of the driving motor 4, both the first clutch device 6 and the second clutch device 7 are disengaged from the driving, and the lifting column 1 stops the lifting operation.

Under the condition that the driving motor 4 drives the driving gear 500 to normally rotate, the clutch device drives the screw rods 300 in the two lifting upright posts 1 to rotate, so that the lifting upright posts 1 are lifted; when the transmission nut 301 abuts against the upper limit piece 302 or the lower limit piece 303, the lifting column 1 stops lifting, but the driving motor 500 rotates, so that the instant torque of the driving motor 500 is increased, and at the moment, the clutch device is disengaged from transmission or slips, so that the torque of the driving motor 500 is not transmitted to the screw 300 of the lifting column 1, and the linear driving mechanism 3 is protected; therefore, the electric lifting table adopts the clutch device and the cooperation of the upper position limiting piece 302 and the lower position limiting piece 303 to protect the linear driving mechanism and the driving motor 4 when the lifting upright post 1 ascends to the highest point and descends to the lowest point; the cost of adopting extra hardware and software program control is avoided, and control failure caused by software program errors or control defects of the program can be effectively avoided. Therefore, the electric lifting table is low in production cost, not prone to error in lifting operation and high in safety.

Referring again to fig. 3 and 4, as an embodiment of the present invention; the first clutch device 6 comprises a first rotating member 600 in transmission connection with the first end of the driving gear 500 and a first transmitting member 603 in transmission connection with the lifting upright post 1, that is, a driving rod 501 synchronously rotating with the driving gear 500 is connected in a central hole of the driving gear 500, the driving rod 501 is a polygonal rod in the embodiment, two ends of the driving rod are both arranged at the outer sides of two ends of the driving gear 500, and the driving rod at the first end of the driving gear 500 is inserted into a first insertion hole 606 of the first rotating member 600 and used for enabling the first rotating member 600 and the driving gear 500 to synchronously rotate; the first transmission member 603 is coaxially connected to the transmission rod assembly 8, so that the first transmission member 603 and the transmission rod assembly 8 rotate synchronously. A first torsion spring 601 is sleeved on the outer side wall of the first rotating member 600, and the inner wall of the inner ring of the first torsion spring 601 is attached to the outer side wall of the first rotating member 600; one end of the first transmission member 603 close to the first rotation member 600 is provided with a first receiving cavity 604, the first torsion spring 601 is disposed in the first receiving cavity 604, and the first torsion spring 601 is in transmission connection with the first transmission member 603. The second clutch device 7 comprises a second rotating member 700 in transmission connection with the second end of the driving gear 500 and a second transmission member 703 in transmission connection with another lifting upright column, and similarly, a driving rod at the second end of the driving gear 500 is inserted into a second insertion hole 706 of the second rotating member 700, so that the second rotating member 700 and the driving gear 500 synchronously rotate; a second torsion spring 701 is sleeved on the outer side wall of the second rotating member 700, and the inner wall of the inner ring of the second torsion spring 701 is attached to the outer side wall of the second rotating member 700; one end of the second transmission member 703 close to the second rotating member 700 is provided with a second accommodating cavity 704, the second torsion spring 701 is disposed in the second accommodating cavity 704, and the second torsion spring 701 is in transmission connection with the second transmission member 703. The inner wall of the inner ring of the first torsion spring 601 is attached to the outer side wall of the first rotating member 700, so that a rotating friction force exists between the inner wall of the inner ring of the first torsion spring 601 and the outer side wall of the first rotating member 600, and the friction force can enable the first transmission member 603 to rotate along with the first rotating member 600, so that the clutch device can realize the function of transmitting the torque of the driving motor 4; when the instant torque of the driving motor 4 is increased by the driving nut 301 abutting against the upper position limiting part 302 or the lower position limiting part 303, the driving gear 500 drives the first rotating part 600 to rotate so as to overcome the friction force of the inner wall of the inner ring of the first torsion spring 601, and thus the first rotating part 600 and the first driving part 603 are slipped or disengaged from each other for transmission; similarly, the inner wall of the inner ring of the second torsion spring 701 is attached to the outer side wall of the second rotating member 700, so that a rotating friction force exists between the inner wall of the inner ring of the second torsion spring 701 and the outer side wall of the second rotating member 700, and the friction force can enable the second transmission member 703 to rotate along with the second rotating member 700, so that the clutch device can realize the function of transmitting the torque of the driving motor; when the instantaneous torque of the driving motor 4 is increased by the driving nut 301 abutting against the upper position limiting part 302 or the lower position limiting part 303, the driving gear 500 drives the second rotating part 700 to rotate so as to overcome the friction force of the inner wall of the inner ring of the second torsion spring 701, and thus the second rotating part 700 and the second transmission part 703 are slipped or disengaged from each other for transmission; therefore, the driving motor 4 is prevented from continuously transmitting torque to the screw rod 300 of the lifting upright post 1 to damage the screw rod, and the internal damage of the driving motor 4 is also avoided.

Referring again to fig. 3 and 4, as an embodiment of the present invention; the first transmission member 600 is provided with a first notch 605 communicated with the first receiving cavity 604, two first torsion arms 602 of the first torsion spring 601 are disposed in the first notch 605, and a rotation gap is formed in the first notch 605, so that when the first torsion spring 601 rotates, the two first torsion arms 602 can drive the first transmission member 603 to rotate. The second transmission member 700 is provided with a second notch 705 communicated with the second accommodating cavity 704, two second torsion arms 702 of the second torsion spring 701 are arranged in the second notch 705, and a rotation gap is formed in the second notch 705, so that when the second torsion spring 701 rotates, the two second torsion arms 702 can drive the second transmission member 703 to rotate. The two first torsion arms 602 of the first torsion spring 601 can drive the first transmission member 603 to rotate, and the two second torsion arms 702 of the second torsion spring 701 can drive the second transmission member 703 to rotate, so as to realize the transmission function; however, when the load of the electric lifting table is large and the driving motor 4 stops working, the linear driving mechanism 3 in the lifting column 1 will contract under the action of large axial pressure, and at this time, the first transmission member 603 and the second transmission member 703 will rotate passively, because the two first torsion arms 602 of the first torsion spring 601 have a rotation gap in the first notch 605 and the two second torsion arms 702 of the second torsion spring 701 have a rotation gap in the second notch 705, the passive rotation of the first transmission member 603 and the second transmission member 703 will not directly apply torsion to the first rotation member 600 and the second rotation member 700, but will first act on the first torsion spring 601 and the second torsion spring 701, so that the outer diameter of the first torsion spring 601 will be reduced to clasp the first rotation member 603 and the outer diameter of the second torsion spring 701 will be reduced to clasp the second rotation member 703, thereby realizing the self-locking function and avoiding the passive rotation of the transmission member directly applying torsion to the driving gear, the stress of the driving gear is reduced.

Referring again to fig. 5, as an embodiment of the present invention; a first connecting part is arranged on the gear seat 5, the first connecting part comprises two first connecting grooves 502 arranged side by side, and a locking nut 504 is in clearance fit in each first connecting groove 502; the mounting plate 10 is provided with a second connecting part, the second connecting part comprises two first connecting holes 1000 arranged on the mounting plate 10, and the two first connecting holes 1000 are in one-to-one correspondence with the two first connecting grooves 502; a locking screw 1002 is connected to each first connection hole 1000, and a free end of the locking screw 1002 is inserted into the first connection groove 502 and is in threaded connection with the locking nut 504 in the first connection groove 502. Through wearing to establish locking screw 1002 in two first connecting holes 1000, and make the free end of locking screw 1002 wear to establish in first connecting groove 502 and with lock nut 504 threaded connection in first connecting groove 502 can fix gear seat 5 and driving motor 4, when the mounted position of gear seat 5, only need unscrew locking screw 1002, then adjust the upper and lower angle of gear seat 5 one end, the axis that makes drive gear 500 and clutch's axis and the axis of linear drive mechanism input are on same axis, then it can to tighten locking screw 1002 again, thereby guarantee that driven concentricity makes transmission efficiency obtain effectively improving.

Referring again to fig. 5, as an embodiment of the present invention; the first connecting part further comprises a second connecting groove 505, the second connecting groove 505 is arranged on the side wall of the gear seat 5 below the two first connecting grooves 502, and a locking nut is in clearance fit in the second connecting groove 505; a second connection hole 1001 corresponding to the second connection groove 505 is provided on the mounting plate 10, and a locking screw capable of being in threaded connection with a locking nut in the second connection groove 505 is connected in the second connection hole 1001. The two first connecting grooves 502 are both arranged at the upper part of the gear seat 5 and both penetrate through the top wall of the gear seat 5; each first connecting groove 502 is provided with a nut groove 503 for receiving a lock nut 504, and the nut groove 503 is configured to limit the lock nut from moving axially. The second connecting groove 505 is arranged at the lower part of the gear seat 5 and penetrates through the bottom wall of the gear seat 5; a nut groove for receiving the lock nut is provided in the second coupling groove 505, and the nut groove is configured to limit the lock nut from moving axially. The second connecting hole 1001 on the mounting plate 10 is matched and mounted with the second connecting groove 505 on the gear seat 5, so that the connection between the gear seat 5 and the mounting plate 10 is firmer and more stable.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An electric lifting table is characterized in that: it comprises

the driving gear is in transmission connection with the driving motor;

2. An electrically powered elevating table as set forth in claim 1 wherein: the driving motor is connected with a hollow gear seat with two open ends, and the driving gear is rotatably connected in the gear seat; the lifting upright post is connected with a mounting plate, the gear seat is connected to the mounting plate, and the mounting position of the gear seat on the mounting plate can be adjusted.

3. An electrically powered elevating table as set forth in claim 1 wherein: the first clutch device comprises a first rotating piece in transmission connection with the first end of the driving gear and a first transmission piece in transmission connection with the lifting upright post, a first torsion spring is sleeved on the outer side wall of the first rotating piece, and the inner wall of an inner ring of the first torsion spring is attached to the outer side wall of the first rotating piece; the first torsion spring is arranged in the first accommodating cavity and is in transmission connection with the first transmission member.

4. An electrically powered elevating table as claimed in claim 1 or claim 3 wherein: the second clutch device comprises a second rotating part in transmission connection with the second end of the driving gear and a second transmission part in transmission connection with the other lifting stand column, a second torsion spring is sleeved on the outer side wall of the second rotating part, and the inner wall of an inner ring of the second torsion spring is attached to the outer side wall of the second rotating part; the one end that the second driving medium is close to the second rotation piece is equipped with second holding chamber, but the second torsional spring setting is connected with the second driving medium transmission at second holding intracavity and second torsional spring.

5. A motorized lift table, as set forth in claim 3, wherein: the first transmission piece is provided with a first notch communicated with the first accommodating cavity, the two torsion arms of the first torsion spring are arranged in the first notch and provided with a rotating gap in the first notch, and when the first torsion spring rotates, the first transmission piece can be driven to rotate by the two torsion arms.

6. An electrically powered elevating table as set forth in claim 4 wherein: the second driving medium is provided with a second notch communicated with the second accommodating cavity, two torsion arms of the second torsion spring are arranged in the second notch and have a rotating clearance in the second notch, and when the second torsion spring rotates, the two torsion arms can drive the second driving medium to rotate.

7. An electrically powered elevating table as set forth in claim 2 wherein: the gear seat is provided with a first connecting part, the first connecting part comprises two first connecting grooves which are arranged side by side, and a locking nut is in clearance fit in each first connecting groove; the mounting plate is provided with a second connecting part, the second connecting part comprises two first connecting holes arranged on the mounting plate, and the two first connecting holes are in one-to-one correspondence with the two first connecting grooves; and each first connecting hole is internally connected with a locking screw, and the free end of each locking screw penetrates through the first connecting groove and is in threaded connection with the locking nut in the first connecting groove.

8. An electrically powered elevating table as defined in claim 7 wherein: the first connecting part also comprises a second connecting groove which is arranged on the side wall of the gear seat below the two first connecting grooves, and a locking nut is in clearance fit in the second connecting groove; and a second connecting hole corresponding to the second connecting groove is formed in the mounting plate, and a locking screw capable of being in threaded connection with a locking nut in the second connecting groove is connected in the second connecting hole.

9. An electrically powered elevating table as defined in claim 7 wherein: the two first connecting grooves are arranged at the upper part of the gear seat and penetrate through the top wall of the gear seat; each first connecting groove is internally provided with a nut groove for accommodating the locking nut, and the nut groove is arranged to limit the locking nut to move axially.

10. An electrically powered elevating table as set forth in claim 8 wherein: the second connecting groove is arranged at the lower part of the gear seat and penetrates through the bottom wall of the gear seat; and a nut groove for accommodating the locking nut is arranged in the second connecting groove and can limit the locking nut to move axially.

11. An electrically powered elevating table as set forth in claim 1 wherein: the upper limiting part is an upper limiting plate connected to the upper portion of the screw rod, and the lower limiting part is a lower limiting plate connected to the lower portion of the screw rod.