Single-motor lifting table

Abstract

The utility model provides a single-motor lifting table which comprises a motor, a transmission rod, a flexible connecting piece, a first stand column and a second stand column, the first stand column and the second stand column are arranged in a spaced mode, and the transmission rod is arranged between the first stand column and the second stand column. The motor is configured to drive the transmission rod to rotate, the transmission rod is configured to link the two stand columns to synchronously ascend and descend, the transmission assembly is configured to be used for driving the stand columns to ascend and descend, the motor drives the transmission rod to rotate so as to drive the transmission assembly to move, the transmission assembly can drive the two stand columns to ascend and descend, and in the movement process of the stand columns, resistance meeting detection work is carried out; the motor is installed on the first stand column and internally provided with a flexible piece, the transmission rod is flexibly connected with the transmission assembly of the first stand column through the motor, the transmission rod is flexibly connected with the transmission assembly of the second stand column through a flexible connecting piece, and therefore vibration and noise are reduced, and the adverse effect of radial disturbance of the transmission rod on the detection resistance condition is eliminated. And the accuracy of resistance detection is improved.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a single-motor lifting table. Background Art

[0002] Electric furniture, such as electric beds and electric tables, has functions such as automatic lifting and automatic flipping, which is convenient for users. In order to prevent electric furniture from pinching users during activities, electric furniture is usually equipped with an obstacle retraction function. That is, when the device senses an obstacle during movement, it will immediately move in the opposite direction to avoid the obstacle, thereby preventing damage to the furniture or pinching the user.

[0003] In a single-motor lift table, a resistance detection sensor is also provided. Generally, this sensor is installed on the lifting column and determines the resistance by detecting the change in the load on the table or column. However, in the prior art, the resistance detection accuracy of a single-motor lift table is poor. This problem is mainly due to the fact that the straightness of the transmission rod used to drive the two columns to rise and fall cannot be guaranteed. Specifically, the transmission rod is inserted into the gear box of the two lifting columns. Under ideal conditions, the transmission rod remains straight after being inserted into the gear box and is not subjected to radial forces. However, in reality, the interfaces of the two gear boxes cannot be 100% aligned. After the transmission rod is connected to the two gearboxes, it will be twisted due to the force applied. When the non-straight transmission rod rotates, the transmission rod will be twisted due to the tension and radial disturbance will occur. This disturbance will be further transmitted to the gearbox and the column, thereby generating noise and vibration. Since the sensing element is set on the column, the noise and vibration caused by the disturbance will interfere with the detection of the sensing element, thereby affecting the accuracy of the resistance detection and making the waveform output by the sensing element very unstable. When resistance occurs, it is impossible to make an accurate judgment, which further affects the user experience and even causes damage to the furniture and injury to the user. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the utility model provides a single-motor lifting table, comprising a motor, a transmission rod, a flexible connecting member, and a first column and a second column arranged at intervals, the transmission rod being arranged between the first column and the second column; the motor is configured to drive the transmission rod to rotate, the transmission rod is configured to link the two columns to rise and fall synchronously, the transmission assembly is configured to drive the columns to rise and fall, the motor drives the transmission rod to rotate and thereby drives the transmission assembly to move, the transmission assembly will drive the two columns to rise and fall, and resistance detection will be performed during the movement of the columns; the motor is installed on the first column and has a built-in flexible member, the transmission rod and the transmission assembly of the first column are flexibly connected through the motor, and the transmission rod and the transmission assembly of the second column are flexibly connected through the flexible connecting member, thereby reducing vibration and noise and eliminating the adverse effects of radial disturbance of the transmission rod on the detection of resistance, thereby improving the accuracy of resistance detection.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A single-motor lifting table includes a motor, a transmission rod, a flexible connector, and a first column and a second column arranged at intervals, the transmission rod is arranged between the first column and the second column; the first column and the second column both include a transmission assembly, the motor is mounted on the first column, the transmission assembly of the first column is transmission-connected to the motor, the end of the transmission rod close to the first column is inserted into the motor, the motor includes a flexible component arranged inside the motor, the flexible component is configured to release disturbances generated when the transmission rod rotates; the end of the transmission rod close to the second column is transmission-connected to the transmission assembly of the second column via a flexible connector, the flexible connector is configured to flexibly connect the transmission rod to the transmission assembly of the second column and release disturbances generated when the transmission rod rotates.

[0007] The motor is configured to drive the transmission rod to rotate, the transmission rod is configured to link the two columns to rise and fall synchronously, the transmission assembly is configured to drive the columns to rise and fall, the motor drives the transmission rod to rotate and then drives the transmission assembly to move, the transmission assembly will drive the two columns to rise and fall, and during the movement of the columns, resistance detection will be performed; however, when the transmission rod is connected to the transmission assembly, the straightness of the transmission rod cannot be guaranteed. In this case, the more costly method of increasing the installation accuracy to improve the straightness is abandoned, and the method of releasing the transmission rod disturbance is adopted to reduce vibration and noise, so as to reduce or eliminate the impact on the accuracy of resistance detection.

[0008] In this solution, on the second column, the transmission rod and the transmission assembly are connected radially flexibly through a flexible connector, that is, the radial direction of the transmission rod is not restricted and fixed. Instead, when the assembly straightness is insufficient, the transmission rod can not only drive the transmission assembly to move, but also cause micro-movements between the transmission rod and the transmission assembly in the radial direction. Such micro-movements will be absorbed by the flexible connector, and the vibration will not be transmitted to the transmission assembly and the column, thereby reducing vibration and noise and eliminating the adverse effects of the radial disturbance of the transmission rod on the detection of resistance, thereby improving the accuracy of resistance detection.

[0009] On the first column, since there is a flexible part inside the motor, the transmission rod and the transmission assembly are connected radially flexibly through the motor. Although the connection methods of the transmission rod and the first column and the second column are different, the same effect can be achieved, thereby comprehensively improving the accuracy of resistance detection.

[0010] For the motor, there are also straightness requirements when the motor is connected to the transmission component. When the straightness cannot meet the requirements, the flexible parts built into the motor can still ensure a flexible connection between the motor and the transmission component, eliminating disturbances between the motor and the transmission component, and further ensuring the accuracy of resistance detection.

[0011] Preferably, the flexible connector is a universal coupling. There are many types of universal couplings, but their functions are similar. The universal coupling allows the transmission rod to move radially after being connected to the transmission assembly, thereby acting as a flexible connector to eliminate transmission rod disturbances.

[0012] Preferably, the universal joint is a single cross universal joint, which is a relatively basic universal joint with a relatively simple structure and low cost.

[0013] Preferably, the flexible connection member is a flexible coupling.

[0014] Preferably, the flexible coupling comprises two coupling parts and a flexible body disposed between the two coupling parts. The transmission rod is plugged into one coupling part, and the transmission assembly is connected to the other coupling part. The coupling part has claws, and the flexible body has a plurality of grooves. The coupling part and the flexible body are connected to each other through a snap-fit engagement between the claws and the grooves. The two coupling parts are spaced apart and independently connect the transmission rod and the transmission assembly. The flexible body is elastic, allowing micro-motion between the two coupling parts, thereby eliminating the influence of transmission rod disturbance on resistance detection.

[0015] Preferably, the flexible connector is a flexible shaft. When the flexible connector is a flexible shaft, the same effect can be achieved, that is, the disturbance of the transmission rod is released and the influence on the resistance detection is eliminated.

[0016] Preferably, the transmission assembly includes a gearbox, a connecting rod is inserted into the gearbox, and the connecting rod has an outer end protruding from the surface of the column; the outer end of the connecting rod on the first column is inserted into the motor; the outer end of the connecting rod on the second column is connected to the flexible connector, and the outer end of the connecting rod on the second column is inserted into one end of the flexible connector, and the end of the transmission rod close to the second column is inserted into the other end of the flexible connector. When the consumer receives the lifting table, the connecting rod has already been inserted into the gearbox, and the transmission rod only needs to be connected to the connecting rod, without the need for complicated adjustments to align the interface of the gearbox, which facilitates installation for consumers and also facilitates the design of the flexible connection without having to consider changing the complex gearbox structure.

[0017] Preferably, the transmission rod includes external spline sleeves at both ends, with at least 12 spline teeth. When consumers install and adjust the transmission rod after receiving the lifting table, the larger number of spline teeth allows the transmission rod to rotate at a smaller angle when the teeth are not engaged and need to be adjusted, compared to a structure with fewer spline teeth, facilitating assembly of the transmission rod.

[0018] Preferably, the motor is provided with a flexible seat, one end of which is inserted into the motor and the other end of which abuts the first column. The motor is flexibly connected to the first column via the flexible seat. The flexible seat is elastic, and the motor and the first column are also flexibly connected, which not only further reduces the transmission of transmission rod disturbances but also reduces vibration and noise for the motor itself.

[0019] Preferably, the motor has an output end, within which is disposed an output member for rotating a transmission rod and a transmission wheel for rotating the output member. The flexible member is disposed between the transmission wheel and the output member, and the transmission rod is inserted into the output member. The motor is configured such that rotation of the transmission wheel drives rotation of the flexible member, which in turn drives rotation of the output member, which in turn drives rotation of the transmission rod. The provision of the flexible member between the output member and the transmission wheel enables both tight transmission coordination between the motor, the connecting rod, and the transmission rod, and a flexible connection between the transmission rod and the connecting rod.

[0020] Preferably, the flexible member has a first latching tooth and a second latching groove, the transmission wheel has a first latching groove, and the output member has a second latching tooth, the first latching tooth is latched in the first latching groove, and the second latching tooth is latched in the second latching groove. Transmission between the transmission wheel, the flexible member, and the transmission wheel is achieved through the latching teeth and the latching groove.

[0021] Preferably, the flexible member is a soft rubber. The flexible member is elastic, and by providing the soft rubber in the motor, a flexible connection between the transmission rod and the connecting rod is achieved, which can also provide a shock-absorbing and energy-absorbing effect, and is also beneficial for the connection between the motor and the connecting rod that is not linear enough.

[0022] Preferably, both the first and second columns are provided with sensing elements for detecting resistance and retraction. These sensing elements are typically piezoelectric plates, which generate different waveforms depending on the load on the columns. Eliminating the disturbance of the transmission rod stabilizes the waveform output by the sensing elements, allowing accurate judgment when resistance is present.

[0023] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0024] The motor is configured to drive the transmission rod to rotate, the transmission rod is configured to link the two columns to rise and fall synchronously, the transmission assembly is configured to drive the columns to rise and fall, the motor drives the transmission rod to rotate and then drives the transmission assembly to move, the transmission assembly will drive the two columns to rise and fall, and during the movement of the columns, resistance detection will be performed; however, when the transmission rod is connected to the transmission assembly, the straightness of the transmission rod cannot be guaranteed. In this case, the more costly method of increasing the installation accuracy to improve the straightness is abandoned, and the method of releasing the transmission rod disturbance is adopted to reduce vibration and noise, so as to reduce or eliminate the impact on the accuracy of resistance detection.

[0025] In this solution, on the second column, the transmission rod and the transmission assembly are connected radially flexibly through a flexible connector, that is, the radial direction of the transmission rod is not restricted and fixed. Instead, when the assembly straightness is insufficient, the transmission rod can not only drive the transmission assembly to move, but also cause micro-movements between the transmission rod and the transmission assembly in the radial direction. Such micro-movements will be absorbed by the flexible connector, and the vibration will not be transmitted to the transmission assembly and the column, thereby reducing vibration and noise and eliminating the adverse effects of the radial disturbance of the transmission rod on the detection of resistance, thereby improving the accuracy of resistance detection.

[0026] On the first column, since there is a flexible part inside the motor, the transmission rod and the transmission assembly are connected radially flexibly through the motor. Although the connection methods of the transmission rod and the first column and the second column are different, the same effect can be achieved, thereby comprehensively improving the accuracy of resistance detection.

[0027] For the motor, there are also straightness requirements when the motor is connected to the transmission component. When the straightness cannot meet the requirements, the flexible parts built into the motor can still ensure a flexible connection between the motor and the transmission component, eliminating disturbances between the motor and the transmission component, and further ensuring the accuracy of resistance detection.

[0028] Compared with rigid connections, flexible connections free the transmission rod from radial movement restrictions, which, on the one hand, reduces the vibration caused by disturbances, and on the other hand, the vibration caused by disturbances will be absorbed and buffered by the flexible connection. After the transmission rod is connected to the two transmission components, it will be twisted and bent due to poor straightness. Under rigid connections, the transmission rod will generate disturbances due to its own twisting during movement. When the vibrations generated by the disturbances are transmitted to the transmission components and the columns, they will affect the accuracy of resistance detection. Under flexible connections, the twisting of the transmission rod is reduced due to the flexible connection, and the disturbances and vibrations generated will also be reduced. When the vibrations are transmitted to the transmission components and the columns, they will be absorbed through the flexible connection, thereby further weakening the vibrations to eliminate the impact on the sensing elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the lifting table in the embodiment of the utility model Figure 1 ;

[0030] Figure 2 for Figure 1 A partial enlarged view of part A in the middle;

[0031] Figure 3 This is a schematic diagram of the three-dimensional structure of the lifting table in the embodiment of the utility model Figure 2 ;

[0032] Figure 4 for Figure 3 A partial enlarged view of part B in the middle;

[0033] Figure 5 This is a front view of the lifting table after removing the outer tube shielding in the embodiment of the utility model;

[0034] Figure 6 This is a side view of the motor installed on the column in the embodiment of the present utility model;

[0035] Figure 7 This is an exploded view of the soft rubber, output member and transmission wheel in the embodiment of the present utility model;

[0036] Figure 8 This is a schematic diagram of the three-dimensional structure of the flexible coupling in an embodiment of the present utility model;

[0037] Figure 9 This is an exploded view of the flexible coupling in an embodiment of the present invention.

[0038] The figures are marked as follows: motor 1; output end 101; transmission rod 2; inner tube 31; outer tube 32; first column 301; second column 302; induction element 4; gear box 5; connecting rod 6; flexible connector 7; flexible member 8; output member 9; transmission wheel 10; first latching tooth 11; second latching groove 12; first latching groove 13; second latching tooth 14; coupling portion 15; flexible body 16; claw portion 17; groove 18; external spline sleeve 19; flexible seat 20; flexible connection portion 201; main body 202; mounting hole 21. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0042] The specific implementation of the utility model is as follows:

[0043] like Figure 5As shown, the utility model provides a single-motor lifting table, including a motor 1, a transmission rod 2, a flexible connector 7, and a first column 301 and a second column 302 arranged at intervals, the transmission rod 2 is arranged between the first column 301 and the second column 302; the first column 301 and the second column 302 both include a transmission assembly, the motor 1 is installed on the first column 301, the transmission assembly of the first column 301 is transmission-connected to the motor 1, the end of the transmission rod 2 close to the first column 301 is inserted into the motor 1, the motor 1 includes a flexible member 8 arranged inside the motor 1, the flexible member 8 is configured to release the disturbance generated when the transmission rod 2 rotates; the end of the transmission rod 2 close to the second column 302 is transmission-connected to the transmission assembly of the second column 302 through the flexible connector 7, the flexible connector 7 is configured to flexibly connect the transmission rod 2 to the transmission assembly of the second column 302 and release the disturbance generated when the transmission rod 2 rotates.

[0044] The motor 1 is configured to drive the transmission rod 2 to rotate, the transmission rod 2 is configured to link the two columns to rise and fall synchronously, and the transmission assembly is configured to drive the columns to rise and fall. The motor 1 drives the transmission rod 2 to rotate and then drives the transmission assembly to move. The transmission assembly will drive the two columns to rise and fall. During the movement of the columns, resistance detection will be performed; however, when the transmission rod 2 is connected to the transmission assembly, the straightness of the transmission rod 2 cannot be guaranteed. In this case, the more costly method of increasing the installation accuracy to improve the straightness is abandoned, and the method of releasing the disturbance of the transmission rod 2 is adopted to reduce vibration and noise, so as to reduce or eliminate the impact on the accuracy of resistance detection.

[0045] In this solution, on the second column 302, the transmission rod 2 and the transmission assembly are connected radially flexibly through the flexible connector 7, that is, the radial direction of the transmission rod 2 is not restricted and fixed, but when the assembly straightness is insufficient, the transmission rod 2 can not only drive the transmission assembly to move, but also cause the transmission rod 2 to produce micro-motion between the transmission assembly and the transmission rod in the radial direction. This micro-motion will be absorbed by the flexible connector 7, and the vibration will not be transmitted to the transmission assembly and the column, thereby reducing vibration and noise and eliminating the adverse effects of the radial disturbance of the transmission rod 2 on the detection of resistance, thereby improving the accuracy of resistance detection.

[0046] On the first column 301, since the motor 1 has a flexible part 8, the transmission rod 2 and the transmission assembly are connected radially flexibly through the motor 1. Although the connection methods of the transmission rod 2 and the first column 301 and the second column 302 are different, the same effect can be achieved, thereby comprehensively improving the accuracy of resistance detection.

[0047] For motor 1, there is also a straightness requirement when motor 1 is connected to the transmission component. When the straightness cannot meet the requirement, the flexible part 8 built into motor 1 can still ensure that motor 1 and the transmission component are in a flexible connection, eliminating the disturbance between motor 1 and the transmission component, and further ensuring the accuracy of resistance detection.

[0048] Compared with the rigid connection, the flexible connection frees the transmission rod 2 from radial movement restrictions, which reduces the vibration caused by the disturbance on the one hand, and absorbs and buffers the vibration caused by the disturbance by the flexible connection on the other hand. After the transmission rod 2 is connected to the two transmission components, it will be twisted and bent due to the difference in straightness. Under the rigid connection, the transmission rod 2 will generate disturbances due to its own twisting when it moves. When the vibration caused by the disturbance is transmitted to the transmission component and the column, it will affect the accuracy of the resistance detection. Under the flexible connection, the twisting of the transmission rod 2 is weakened by the flexible connection, and the disturbance and the vibration generated will also be weakened. When the vibration is transmitted to the transmission component and the column, it will be absorbed through the flexible connection, thereby further weakening the vibration to eliminate the impact on the sensing element 4.

[0049] Specifically, if Figure 1-5 As shown, the first column 301 and the second column 302 both include an inner tube 31 and an outer tube 32. The outer tube 32 is sleeved on the inner tube 31, and the inner tube 31 is connected to the table legs of the lifting table. The upper end plate of the outer tube 32 is provided with the sensing element 4; the transmission assembly includes a gear box 5 and a linear push rod. The linear push rod is vertically arranged in the column, and the gear box 5 is arranged at the upper end of the linear push rod and is transmission-connected to the linear push rod; the gear box 5 is connected to the upper end plate of the outer tube 32, and the linear push rod is connected to the inner tube 31. The linear push rod is a screw and nut assembly. When the linear push rod is working, it drives the inner tube 31 and the outer tube 32 to extend and retract, thereby causing the column to rise and fall.

[0050] A connecting rod 6 is inserted into the gear box 5, and the connecting rod 6 has an outer end protruding from the surface of the column; the outer end of the connecting rod 6 on the first column 301 is inserted in the motor 1; the outer end of the connecting rod 6 on the second column 302 is connected to the flexible connector 7, and the outer end of the connecting rod 6 on the second column 302 is inserted in one end of the flexible connector 7, and the end of the transmission rod 2 close to the second column 302 is inserted in the other end of the flexible connector 7; when the consumer receives the lifting table, the connecting rod 6 has been inserted into the gear box 5, and the transmission rod 2 only needs to be connected to the connecting rod 6, and there is no need to perform complicated adjustments to align the interface of the gear box 5, which is convenient for consumers to install, and also facilitates the design of the flexible connection, without having to consider changing the complex structure of the gear box 5.

[0051] There are many options for the flexible connector 7, which may be a flexible shaft, a flexible coupling or a universal coupling; Figure 8 、 9As shown, the flexible coupling is a coupling with a flexible body 16 built in. The shafts connected on both sides can produce slight relative motion, and do not lock the two shafts in radial direction like a rigid coupling; the flexible coupling includes two coupling parts 15 and a flexible body 16 arranged between the two coupling parts 15, the transmission rod 2 is plugged into one of the coupling parts 15, and the transmission assembly is connected to the other coupling part 15; the coupling part 15 has a claw part 17, and the flexible body 16 has a plurality of grooves 18, and the coupling part 15 and the flexible body 16 are connected in transmission by the snap fit between the claw part 17 and the groove 18; the two coupling parts 15 are arranged at intervals, and are respectively connected to the transmission rod 2 and the transmission assembly, and the flexible body 16 is elastic, so that micro-motion can be generated between the two coupling parts 15, thereby eliminating the influence of the disturbance of the transmission rod 2 on the resistance detection.

[0052] like Figure 1 、 3 As shown in Figures 4 and 5, there are many types of universal couplings, but their functions are similar. The universal coupling allows the transmission rod 2 to still move in the radial direction after being connected to the transmission assembly, thereby serving as a flexible connector 7 to eliminate the disturbance of the transmission rod 2. In this embodiment, a universal coupling is used as the flexible connector 7, and specifically a single cross universal joint. The single cross universal joint is a relatively basic universal coupling with a relatively simple structure and low cost.

[0053] The flexible connector 7 is connected to the transmission rod 2 through a spline transmission. The transmission rod 2 includes an external spline sleeve 19 at both ends thereof. The number of spline teeth is at least 12. Generally speaking, the number of spline teeth at the end of the transmission rod 2 is generally 6, while this solution increases the number of spline teeth, so that the number of spline teeth reaches 12 or even 18; after the consumer receives the lifting table, when installing and adjusting the transmission rod 2, due to the large number of spline teeth, compared with the structure with a smaller number of spline teeth, when the teeth are not engaged and need to be adjusted, the rotation angle of the transmission rod 2 is smaller, which facilitates the assembly of the transmission rod 2.

[0054] In addition, if Figure 1 、 2As shown in Figures 6 and 7, the motor 1 is also flexibly mounted on the first column 301. Specifically, a flexible seat 20 is provided on the motor 1, one end of the flexible seat 20 is inserted in the motor 1, and the other end of the flexible seat 20 is in contact with the first column 301. The motor 1 is softly connected to the first column 301 through the flexible seat 20; further, two centrally symmetrical mounting holes 21 are provided on the motor 1, and the flexible seat 20 has a flexible connecting portion 201 and a main body 202. The flexible connecting portion 201 is inserted in the mounting hole 21, and the main body 202 protrudes from the surface of the motor 1, and the main body 202 is in contact with the first column; the flexible seat 20 is elastic, and the motor 1 and the first column 301 are also flexibly connected, which not only further reduces the transmission of disturbances of the transmission rod 2, but also reduces vibration and noise for the motor 1 itself; finally, screws are installed in the flexible seat 20 to mount the motor 1 on the first column 301.

[0055] The motor 1 has an output end 101, in which an output member 9 for driving the transmission rod 2 to rotate and a transmission wheel 10 for driving the output member 9 to rotate are provided. The flexible member 8 is provided between the transmission wheel 10 and the output member 9, and the transmission rod 2 is inserted into the output member 9. The motor 1 is configured so that the rotation of the transmission wheel 10 drives the flexible member 8 to rotate, the flexible member 8 drives the output member 9 to rotate, and the output member 9 drives the transmission rod 2 to rotate. By providing the flexible member 8 between the output member 9 and the transmission wheel 10, a close transmission fit between the motor 1 and the connecting rod 6 and the transmission rod 2 can be achieved, and a flexible connection between the transmission rod 2 and the connecting rod 6 can be achieved. The flexible member 8 has a first latching tooth 11 and a second latching groove 12, and the transmission wheel 10 has a first latching groove 13. The output member 9 has a second latch tooth 14, the first latch tooth 11 is clamped in the first clamping groove 13, and the second latch tooth 14 is clamped in the second clamping groove 12; the transmission between the transmission wheel 10, the flexible member 8 and the transmission wheel 10 is realized by the latch tooth and the clamping groove. The number of the first latch teeth 11 is 6, which are evenly distributed along the circumference of the flexible member 8. Similarly, the number of the second latch teeth 14, the first clamping groove 13 and the second clamping groove 12 are all 6 to achieve more stable transmission; the flexible member 8 is soft rubber; the flexible member 8 is elastic, and the flexible connection between the transmission rod 2 and the connecting rod 6 is realized by arranging soft rubber in the motor 1, which can also provide the effect of shock absorption and energy absorption, and is also beneficial to the connection between the motor 1 and the connecting rod 6 with insufficient straightness.

[0056] It should be noted that the transmission rod 2 can perform radial movement after the flexible connection, but the connecting rod 6 inserted into the gear box 5 needs to maintain a rigid connection with the gear box 5. The connecting rod 6 should not and cannot produce unnecessary radial movement on the gear box 5. The two need to be tightly matched to achieve stable transmission of the transmission assembly; since the two connecting rods 6 are independently inserted into the gear box 5, the straightness of the two does not need to be considered individually, and the transmission rod 2 and the two connecting rods 6 constitute a whole. Due to the existence of the flexible connection, although the straightness is insufficient, the negative effects caused by this can be eliminated, thereby ensuring the accuracy of resistance detection.

Claims

1. A single motor lift table, characterized by: It includes a motor, a transmission rod, a flexible connector, and a first column and a second column arranged at intervals, the transmission rod is arranged between the first column and the second column; the first column and the second column both include a transmission assembly, the motor is installed on the first column, the transmission assembly of the first column is transmission-connected to the motor, the end of the transmission rod close to the first column is inserted into the motor, the motor includes a flexible part arranged inside the motor, the flexible part is configured to release the disturbance generated when the transmission rod rotates; the end of the transmission rod close to the second column is transmission-connected to the transmission assembly of the second column through a flexible connector, the flexible connector is configured to flexibly connect the transmission rod to the transmission assembly of the second column and release the disturbance generated when the transmission rod rotates.

2. The single-motor lift table according to claim 1, characterized in that: The flexible connection is a universal coupling.

3. The single-motor lift table according to claim 2, characterized in that: The universal joint is a single cross universal joint.

4. The single-motor lift table according to claim 1, characterized in that: The flexible connection is a flexible coupling.

5. The single-motor lift table according to claim 4, characterized in that: The flexible coupling includes two coupling parts and a flexible body arranged between the two coupling parts. The transmission rod is plugged into one of the coupling parts, and the transmission assembly is connected to the other coupling part. The coupling part has a claw part, and the flexible body has several grooves. The coupling part and the flexible body are transmission connected through the snap fit between the claw part and the groove.

6. The single-motor lift table according to claim 1, characterized in that: The flexible connecting piece is a soft shaft.

7. The single-motor lift table according to claim 1, characterized in that: The transmission assembly includes a gearbox, on which a connecting rod is inserted, and the connecting rod has an outer end protruding from the surface of the column; the outer end of the connecting rod on the first column is inserted in the motor; the outer end of the connecting rod on the second column is connected to the flexible connector, and the outer end of the connecting rod on the second column is inserted in one end of the flexible connector, and the end of the transmission rod close to the second column is inserted in the other end of the flexible connector.

8. The single-motor lift table according to claim 1, characterized in that: The transmission rod includes an external spline sleeve located at both ends thereof, and the number of spline teeth is at least 12.

9. The single-motor lift table according to claim 1, characterized in that: A flexible seat is provided on the motor, one end of the flexible seat is inserted in the motor, and the other end of the flexible seat is in contact with the first column. The motor is softly connected to the first column through the flexible seat.

10. The single-motor lift table according to claim 1, characterized in that: The motor has an output end, in which an output member for driving the transmission rod to rotate and a transmission wheel for driving the output member to rotate are provided. The flexible member is arranged between the transmission wheel and the output member, and the transmission rod is inserted into the output member. The motor is configured so that the rotation of the transmission wheel drives the flexible member to rotate, the flexible member drives the output member to rotate, and the output member drives the transmission rod to rotate.

11. The single-motor lift table according to claim 10, characterized in that: The flexible component has a first latching tooth and a second latching groove, the transmission wheel has a first latching groove, the output component has a second latching tooth, the first latching tooth is latched in the first latching groove, and the second latching tooth is latched in the second latching groove.

12. The single-motor lift table according to claim 10, characterized in that: The flexible member is soft rubber.

13. The single-motor lift table according to claim 1, characterized in that: The first column and the second column are both provided with sensing elements for detecting retreat in case of resistance.

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