Single-motor lifting table capable of retreating in case of resistance

Abstract

The single-motor lifting table comprises a lifting table frame and a transmission rod arranged on the lifting table frame, the lifting table frame comprises a frame assembly and a motor arranged on the frame assembly, and the motor and the transmission rod are connected at the output end of the motor in an inserted mode and are in transmission connection; the frame assembly comprises two lifting stand columns arranged in a spaced mode and a cross beam connected with the two lifting stand columns, and sensing elements used for detecting the blocking condition are further arranged on the lifting stand columns. The transmission rod is in transmission connection with the transmission assembly, in order to eliminate disturbance caused by insufficient straight line sections when the transmission rod rotates, a release part is arranged in the motor and / or between the transmission rod and the transmission assembly, the release part flexibly connects the transmission rod with the lifting table frame, and the influence of disturbance of the transmission rod on the sensing element is eliminated; the disturbance generated by the transmission rod can be released by the release part no matter whether the release part is arranged in the motor or between the transmission rod and the transmission assembly or between the motor and the transmission rod and the transmission assembly.

Description

Technical Field

[0001] The invention relates to the field of furniture, and in particular to a single-motor lifting table which can retreat when encountering obstacles. 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, an obstacle retreat function is usually set on electric furniture. That is, when an obstacle is sensed during movement, the device 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 lifting table, a sensor element for detecting resistance is also provided. Generally, such a sensor element is provided on the lifting column, and the resistance is judged by detecting the change of the load on the table top or the column. However, in the prior art, the resistance detection accuracy of the single-motor lifting table is poor. This problem is mainly because the straightness of the transmission rod used to drive the two columns to lift cannot be guaranteed. Specifically, the transmission rod is plugged 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 will not be subjected to radial force. However, in reality, the interfaces of the two gear boxes cannot be 100% aligned. After the transmission rod is connected to the two gear boxes, it will be twisted due to the force. When the non-straight transmission rod rotates, the transmission rod will be twisted after being tightened by the force, resulting in radial disturbance. The disturbance will be further transmitted to the gear box and the column, thereby generating noise and vibration. Since the sensing element is arranged 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 furniture damage and user injury. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a single-motor lifting table that retracts when encountering resistance, comprising a lifting table frame and a transmission rod arranged thereon, the lifting table frame comprising a frame assembly and a motor arranged thereon, the motor and the transmission rod being plugged and transmission-connected at the output end of the motor; the frame assembly comprising two lifting columns arranged at intervals and a crossbeam connected to the two lifting columns, and the lifting columns are also provided with a sensing element for detecting resistance; the transmission rod is transmission-connected with the transmission assembly, and in order to eliminate the disturbance caused by insufficient straight line segments when the transmission rod rotates, a release member is arranged in the motor and / or between the transmission rod and the transmission assembly, the release member flexibly connects the transmission rod with the lifting table frame, and eliminates the influence of the disturbance of the transmission rod on the sensing element; that is, no matter the release member is arranged in the motor, or between the transmission rod and the transmission assembly, or between the motor, the transmission rod and the transmission assembly, the release member can release the disturbance generated by the transmission rod when the transmission rod moves, and at the same time, when the transmission rod generates vibration that may cause adverse effects, it will also be absorbed by the release member, and the noise that may be generated by the transmission rod can be reduced, thereby achieving the effect of vibration reduction and noise reduction.

[0005] The technical solution of the present invention is achieved in this way: A single-motor lifting table that retreats when encountering resistance, comprises a transmission rod and a lifting table frame, the transmission rod is arranged on the lifting table frame, the lifting table frame comprises a motor and a frame assembly, the motor is mounted on the frame assembly, the motor has an output end, the transmission rod is inserted in the output end of the motor and is transmission-connected to the motor; the frame assembly comprises a crossbeam and two lifting columns arranged at intervals, the two lifting columns are both connected to the crossbeam, and the lifting columns are provided with sensing elements for detecting resistance; the two lifting columns both comprise a transmission assembly, the transmission rod is located between the two lifting columns and is transmission-connected to the transmission assembly, and the transmission rod is configured to link the two lifting columns to rise and fall synchronously; and further comprises a release member, the release member is arranged in the motor and / or between the transmission rod and the transmission assembly, and the release member is configured to flexibly connect the transmission rod to the lifting table frame and eliminate the influence of the disturbance of the transmission rod on the sensing element.

[0006] In the present solution, no matter whether the release member is arranged in the motor, between the transmission rod and the transmission assembly, or between the motor, the transmission rod and the transmission assembly, the release member can release the disturbance generated by the transmission rod when it moves. That is, after the transmission rod is installed on the lifting table frame, it is twisted due to insufficient straightness. The twisted transmission rod will generate disturbance when it rotates. Due to the existence of the release member, the transmission rod is connected to a certain point of the lifting table frame as a flexible connection. Under the restriction of the release member, the transmission rod can also perform axial disturbance, and the disturbance is released, thereby eliminating the influence of the disturbance of the transmission rod on the sensing element. At the same time, when the transmission rod generates vibration that may cause adverse effects, it will also be absorbed by the release member, and the noise that may be generated by the transmission rod can also be reduced, thereby achieving the effect of vibration reduction and noise reduction.

[0007] The motor drives the transmission rod to rotate and then drives the transmission component to move. The transmission component will drive the lifting column to rise and fall. During the movement of the lifting column, the sensing element detects resistance. In this solution, the transmission rod is flexibly connected to the transmission component or the transmission rod is flexibly connected to the lifting table frame due to the release part in the motor, so that the radial direction of the transmission rod is not restricted and fixed. When the assembly straightness is insufficient, the transmission rod can not only drive the transmission component to move, but also cause micro-movement between the transmission rod and the transmission component in the radial direction. This micro-movement will be absorbed by the flexible connection, and the vibration will not be transmitted to the transmission component and the lifting column, thereby eliminating the influence of radial disturbance on the sensing element's detection of resistance.

[0008] Compared with rigid connections, flexible connections free the transmission rod from radial movement restrictions, which reduces the vibration caused by disturbances on the one hand, and absorbs and buffers the vibrations caused by disturbances on the other hand. After the transmission rod is inserted into the two transmission components, it is twisted and bent due to the difference in straightness. Under rigid connections, the transmission rod will generate disturbances due to its own twisting during movement. When the vibrations caused by the disturbances are transmitted to the transmission components and the lifting columns, they will affect the detection accuracy of the sensing elements. Under flexible connections, the twisting of the transmission rod is reduced due to the flexible connection, and the disturbances and vibrations caused by it will also be reduced. When the vibrations are transmitted to the transmission components and the lifting columns, they will be absorbed through the flexible connection, thereby further reducing the vibrations to eliminate the impact on the sensing elements.

[0009] Preferably, there are two release members, which are respectively arranged inside the motor and between the transmission rod and the transmission assembly. The release member arranged inside the motor is a flexible member, and the release member arranged between the transmission rod and the transmission assembly is a flexible connecting member. The two lifting columns are the first column and the second column, respectively. The transmission assembly includes a gear box, and a connecting rod is inserted into the gear box. The connecting rod has an outer end protruding from the surface of the lifting column. The motor is mounted on the first column, and the outer end of the connecting rod on the first column is inserted into the motor, and the end of the transmission rod close to the first column is inserted into the motor, and the transmission rod and the connecting rod of the first column are flexibly connected through the flexible member inside the motor; the end of the transmission rod close to the second column is inserted into the flexible connecting member, and the outer end of the connecting rod of the second column is inserted into the flexible connecting member, and the transmission rod and the connecting rod of the first column are flexibly connected through the flexible connecting member. The disturbance generated when the transmission rod rotates is released by the flexible member and the flexible connecting member. In this preferred embodiment, there are two different release members, namely a flexible member and a flexible connecting member, and one end of the transmission rod is connected to the transmission assembly of the second column through the flexible connecting member, and the other end of the transmission rod is connected to the transmission assembly of the first column through the motor. The flexible member in the motor enables the end of the transmission rod close to the first column to release disturbances, thereby realizing a flexible connection between the transmission rod and the lifting table frame.

[0010] Preferably, a flexible seat is provided on the motor, one end of which is inserted into the motor, and the other end of which is in contact with the first column, and the motor is flexibly connected to the first column through the flexible seat. The flexible seat is elastic, and the motor is also flexibly connected to the first column through the flexible seat, which not only further reduces the transmission of the transmission rod disturbance, but also reduces vibration and noise for the motor itself.

[0011] Preferably, there are two release members, and the two release members are respectively arranged between the transmission rod and the transmission assembly of the two columns; the motor is installed on the crossbeam, and in the left and right directions, the motor is located near the middle of the crossbeam, the motor is sleeved on the transmission rod and is connected to the transmission rod in transmission; the transmission assembly includes a gear box, a connecting rod is inserted into the gear box, and the connecting rod has an outer end protruding from the surface of the lifting column; the two release members are respectively sleeved on the two ends of the transmission rod, and the connecting rods of the two lifting columns are respectively inserted in the two release members located at both ends of the transmission rod, and the transmission rod and the connecting rod are connected in transmission through the release members, and the release members are configured to make the transmission rod and the connecting rod flexibly connected and release the disturbance generated when the transmission rod rotates. In this preferred solution, the two release members are arranged at the two ends of the transmission rod, and the two ends of the transmission rod are directly flexibly connected to the transmission assembly through the release members to release the disturbance when the transmission rod rotates, eliminating the adverse effects of the disturbance on the detection of the sensing element.

[0012] Preferably, there is one release member, and the release member is arranged in the motor, the motor is mounted on the crossbeam, and in the left-right direction, the motor is located near the middle of the crossbeam, the motor is sleeved on the transmission rod and is connected to the transmission rod in a transmission manner; the motor includes the release member arranged inside the motor, and the release member is used to release the disturbance generated when the transmission rod rotates; both ends of the transmission rod are provided with connecting members, and the transmission rod is connected to the transmission assembly in a transmission manner through the connecting members. In this preferred embodiment, although both ends of the transmission rod are rigidly connected to the transmission assembly, the middle part of the transmission rod is inserted into the motor with the release member, and when the transmission rod is disturbed, the two ends of the transmission rod cannot be released, but the middle part of the transmission rod is still flexibly connected to the lifting table frame under the action of the release member, and the disturbance is released, thereby eliminating the adverse effect on the induction element.

[0013] Preferably, the connecting piece is a sleeve, the transmission assembly includes a gear box, a connecting rod is inserted on the gear box, the connecting rod has an outer end protruding from the surface of the column, one end of the sleeve is plugged into the transmission rod, and the other end of the sleeve is plugged into the outer end of the connecting rod. The transmission assembly and the transmission rod are connected through the sleeve transmission, which is simple and convenient to implement and has low cost.

[0014] Preferably, the release member arranged between the transmission rod and the transmission assembly is a flexible connecting member, the transmission assembly includes a gear box, a connecting rod is inserted into the gear box, and the connecting rod has an outer end protruding from the surface of the lifting column; the ends of the transmission rod and the outer end of the connecting rod are respectively inserted at both ends of the flexible connecting member.

[0015] 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 in the radial direction after being connected to the transmission assembly, thereby achieving the effect of eliminating the disturbance of the transmission rod as a flexible connector.

[0016] Preferably, the universal coupling is a single cross universal joint, which is a relatively basic universal coupling with a relatively simple structure and low cost.

[0017] Preferably, the flexible connection member is a flexible coupling.

[0018] Preferably, 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 a plurality of grooves, and the coupling part and the flexible body are transmission-connected by the snap-fitting of the claw part and the groove. The two coupling parts are arranged at intervals, and the transmission rod and the transmission assembly are separately connected, and the flexible body is elastic, so that micro-motion can be generated between the two coupling parts, thereby eliminating the influence of the disturbance of the transmission rod on the resistance detection.

[0019] 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.

[0020] Preferably, the release member arranged in the motor is a flexible member, and an output member for driving the transmission rod to rotate and a transmission wheel for driving the output member to rotate are arranged in the output end of the motor, the flexible member is arranged between the transmission wheel and the output member, and the transmission rod is inserted in 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. The flexible member is arranged inside the motor, between the output member connected to the transmission rod and the transmission wheel directly driven by the motor, so that the transmission rod and the output member are both floatingly located inside the motor, and when the transmission rod is disturbed, the transmission rod can swing smoothly inside the motor, thereby eliminating the adverse effects caused by the disturbance.

[0021] Preferably, the flexible member has a first latching tooth and a second latching groove, the transmission wheel has a first latching groove, 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. The transmission between the transmission wheel, the flexible member and the transmission wheel is realized through the latching tooth and the latching groove.

[0022] Preferably, the transmission rod includes external spline sleeves at both ends thereof, and the number of spline teeth is at least 12. After receiving the lifting table, when consumers install and adjust the transmission rod, due to the large number of spline teeth, compared with a structure with a small number of spline teeth, when the teeth are not engaged and need to be adjusted, the rotation angle of the transmission rod is smaller, which facilitates the assembly of the transmission rod.

[0023] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: In the present solution, no matter whether the release member is arranged in the motor, between the transmission rod and the transmission assembly, or between the motor, the transmission rod and the transmission assembly, the release member can release the disturbance generated by the transmission rod when it moves. That is, after the transmission rod is installed on the lifting table frame, it is twisted due to insufficient straightness. The twisted transmission rod will generate disturbance when it rotates. Due to the existence of the release member, the transmission rod is connected to a certain point of the lifting table frame as a flexible connection. Under the restriction of the release member, the transmission rod can also perform axial disturbance, and the disturbance is released, thereby eliminating the influence of the disturbance of the transmission rod on the sensing element. At the same time, when the transmission rod generates vibration that may cause adverse effects, it will also be absorbed by the release member, and the noise that may be generated by the transmission rod can also be reduced, thereby achieving the effect of vibration reduction and noise reduction.

[0024] The motor drives the transmission rod to rotate and then drives the transmission component to move. The transmission component will drive the lifting column to rise and fall. During the movement of the lifting column, the sensing element detects resistance. In this solution, the transmission rod is flexibly connected to the transmission component or the transmission rod is flexibly connected to the lifting table frame due to the release part in the motor, so that the radial direction of the transmission rod is not restricted and fixed. When the assembly straightness is insufficient, the transmission rod can not only drive the transmission component to move, but also cause micro-movement between the transmission rod and the transmission component in the radial direction. This micro-movement will be absorbed by the flexible connection, and the vibration will not be transmitted to the transmission component and the lifting column, thereby eliminating the influence of radial disturbance on the sensing element's detection of resistance.

[0025] Compared with rigid connections, flexible connections free the transmission rod from radial movement restrictions, which reduces the vibration caused by disturbances on the one hand, and absorbs and buffers the vibrations caused by disturbances on the other hand. After the transmission rod is inserted into the two transmission components, it is twisted and bent due to the difference in straightness. Under rigid connections, the transmission rod will generate disturbances due to its own twisting during movement. When the vibrations caused by the disturbances are transmitted to the transmission components and the lifting columns, they will affect the detection accuracy of the sensing elements. Under flexible connections, the twisting of the transmission rod is reduced due to the flexible connection, and the disturbances and vibrations caused by it will also be reduced. When the vibrations are transmitted to the transmission components and the lifting columns, they will be absorbed through the flexible connection, thereby further reducing the vibrations to eliminate the impact on the sensing elements.

[0026] In this solution, the focus is not on improving the straightness of the transmission rod. First of all, the accuracy of the gear box's socket in the transmission assembly directly affects the straightness. Although the problem can be solved fundamentally, it is difficult and costly to improve the accuracy. By releasing the disturbance of the transmission rod through the release piece, although the radial movement of the transmission rod is increased, the transmission stability of the transmission rod is improved, so that the transmission rod only transmits the required torque to the lifting table frame, preventing the transmission of vibration caused by disturbance, and eliminating the adverse effects caused by its insufficient straightness. It not only has lower cost but also excellent effect, realizes effective denoising when the sensing element receives the signal, and improves the accuracy of the sensing element's resistance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The three-dimensional structure of the lifting table in Example 1 of the present invention is shown in FIG. Figure 1 ; Figure 2 for Figure 1 A partial enlarged view of the middle A part; Figure 3 The three-dimensional structure of the lifting table in Example 1 of the present invention is shown in FIG. Figure 2 ; Figure 4 for Figure 3 A partial enlarged view of part B in the middle; Figure 5 This is a front view of the lifting table after removing the outer tube shielding in Example 1 of the present invention; Figure 6 It is a side view of the motor installed on the column in Example 1 of the present invention; Figure 7 This is an exploded view of the soft rubber, the output member and the transmission wheel in Example 1 of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the flexible coupling in Example 1 of the present invention; Fig. 9 An exploded view of the flexible coupling in Example 1 of the present invention; Fig.10 The three-dimensional structure of the lifting table in Example 2 of the present invention is shown in FIG. Figure 1 ; Fig.11 for Fig.10 A partial enlarged view of the middle C part; Fig.12 The three-dimensional structure of the lifting table in Example 2 of the present invention is shown in FIG. Figure 2 ; Fig.13 for Fig.12 A partial enlarged view of the middle D part; Fig.14 It is a front view of the lifting table in Example 2 of the present invention; Fig.15 This is a schematic diagram of the three-dimensional structure of the flexible connection between the motor and the mounting plate in Example 2 of the present invention; Fig.16 This is a schematic diagram of the three-dimensional structure of the lifting table in Example 3 of the present invention; Fig.17 is a cross-sectional view of a motor in Example 3 of the present invention; Fig.18 This is a front view of the lifting table in Example 3 of the present invention.

[0028] The reference numerals of the figures are as follows: motor 1; output end 101; transmission rod 2; lifting column 3; inner tube 31; outer tube 32; first column 301; second column 302; induction element 4; gear box 5; connecting rod 6; release member 70; flexible connecting member 7; flexible member 8; output member 9; transmission wheel 10; first latch tooth 11; second latch groove 12; first latch groove 13; second latch tooth 14; coupling part 15; flexible body 16; claw part 17; groove 18; external spline sleeve 19; flexible seat 20; flexible connecting part 201; main body 202; mounting hole 21; cross beam 22; mounting plate 23; avoidance hole 24; connecting member 25. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purpose, 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 in the embodiments can be combined with each other without conflict.

[0030] 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] 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.

[0032] The specific implementation methods of the present invention are as follows: Example

[0033] like Figure 1-6As shown, the present invention provides a single-motor lifting table that retreats when encountering resistance, comprising a transmission rod 2 and a lifting table frame, the transmission rod 2 being arranged on the lifting table frame, the lifting table frame comprising a motor 1 and a frame assembly, the motor 1 being mounted on the frame assembly, the motor 1 having an output end 101, the transmission rod 2 being inserted into the output end 101 of the motor 1 and being transmission-connected to the motor 1; the frame assembly comprising a crossbeam 22 and two lifting columns 3 arranged at intervals, the two lifting columns 3 being both connected to the crossbeam 22, the lifting columns 3 being provided with a sensing element 4 for detecting resistance; the two lifting columns 3 both comprising a transmission assembly, the transmission rod 2 being located between the two lifting columns 3 and being transmission-connected to the transmission assembly, the transmission rod 2 being configured to link the two lifting columns 3 to rise and fall synchronously; and further comprising a release member 70, the release member 70 being arranged in the motor 1 and / or between the transmission rod 2 and the transmission assembly, the release member 70 being configured to flexibly connect the transmission rod 2 to the lifting table frame and eliminate the influence of the disturbance of the transmission rod 2 on the sensing element 4.

[0034] In the present solution, no matter whether the release member 70 is arranged in the motor 1, or between the transmission rod 2 and the transmission assembly, or between the motor 1 and the transmission rod 2 and the transmission assembly, the release member 70 can release the disturbance generated by the transmission rod 2 when it moves, that is, after the transmission rod 2 is installed on the lifting table frame, it is twisted due to insufficient straightness, and the twisted transmission rod will generate disturbance when it rotates. Due to the existence of the release member 70, the transmission rod 2 is connected to a certain part of the lifting table frame as a flexible connection. Under the restriction of the release member 70, the transmission rod 2 can also perform axial disturbance, and the disturbance is released, thereby eliminating the influence of the disturbance of the transmission rod 2 on the sensing element 4; at the same time, when the transmission rod 2 generates vibration that may cause adverse effects, it will also be absorbed by the release member 70, and the noise that may be generated by the transmission rod 2 can also be reduced, thereby achieving the effect of vibration reduction and noise reduction.

[0035] The motor 1 drives the transmission rod 2 to rotate and then drives the transmission component to move. The transmission component will drive the lifting column 3 to rise and fall. During the movement of the lifting column 3, the sensing element 4 detects the resistance. In this solution, the transmission rod 2 is flexibly connected to the transmission component or the transmission rod 2 is flexibly connected to the lifting table frame due to the release member 70 in the motor 1, so that the radial direction of the transmission rod 2 is not restricted and fixed. When the assembly straightness is insufficient, the transmission rod 2 can not only drive the transmission component to move, but also cause the transmission rod 2 to generate micro-motion between the transmission component and the transmission component in the radial direction. This micro-motion will be absorbed by the flexible connection, and the vibration will not be transmitted to the transmission component and the lifting column 3, thereby eliminating the influence of radial disturbance on the resistance detection of the sensing element 4.

[0036] Compared with the rigid connection, the flexible connection frees the transmission rod 2 from the radial movement restriction, which reduces the vibration caused by the disturbance on the one hand, and absorbs and buffers the vibration caused by the disturbance on the other hand; after the transmission rod 2 is inserted into the two transmission components, it is 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 moving. When the vibration caused by the disturbance is transmitted to the transmission component and the lifting column 3, it will affect the detection accuracy of the sensing element 4. Under the flexible connection, the twisting of the transmission rod 2 is weakened due to the flexible connection, and the disturbance and the vibration caused by it will also be weakened. When the vibration is transmitted to the transmission component and the lifting column 3, it will be absorbed through the flexible connection, thereby further weakening the vibration to eliminate the influence on the sensing element 4.

[0037] In this embodiment, there are two release members 70, which are respectively arranged inside the motor 1 and between the transmission rod 2 and the transmission assembly. The release member 70 arranged inside the motor 1 is a flexible member 8, and the release member 70 arranged between the transmission rod 2 and the transmission assembly is a flexible connecting member 7; specifically: The two lifting columns 3 are respectively a first lifting column 301 and a second lifting column 302, and the transmission rod 2 is arranged between the first lifting column 301 and the second lifting column 302; the motor 1 is installed on the first lifting column 301, and the transmission assembly of the first lifting column 301 is transmission-connected with the motor 1, and the end of the transmission rod 2 close to the first lifting column 301 is inserted into the motor 1, and the motor 1 includes a flexible member 8 arranged inside the motor 1, and 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 lifting column 302 is transmission-connected with the transmission assembly of the second lifting column 302 through a flexible connector 7, and the flexible connector 7 is configured to flexibly connect the transmission rod 2 with the transmission assembly of the second lifting column 302 and release the disturbance generated when the transmission rod 2 rotates.

[0038] The motor 1 is configured to drive the transmission rod 2 to rotate, the transmission rod 2 is configured to link the two lifting columns to rise and fall synchronously, the transmission assembly is configured to drive the lifting 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 lifting columns to rise and fall, and during the movement of the lifting columns, resistance detection will be performed; however, when the transmission rod 2 is connected to the transmission assembly for transmission, 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 influence on the accuracy of resistance detection.

[0039] In the present solution, on the second lifting column 302, the transmission rod 2 and the transmission assembly are connected in a radially flexible manner 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 micro-motion between the transmission rod 2 and the transmission assembly in the radial direction, and this micro-motion will be absorbed by the flexible connector 7, and the vibration will not be transmitted to the transmission assembly and the lifting 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.

[0040] On the first lifting column 301, since the motor 1 has a flexible member 8, the transmission rod 2 and the transmission assembly are connected radially and flexibly through the motor 1. Although the connection methods of the transmission rod 2 and the first lifting column 301 and the second lifting column 302 are different, the same effect can be achieved, thereby comprehensively improving the accuracy of resistance detection.

[0041] 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, eliminate the disturbance between motor 1 and the transmission component, and further ensure the accuracy of resistance detection.

[0042] Specifically, if Figure 1-5 As shown, the first lifting column 301 and the second lifting 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 lifting column, and the gear box 5 is arranged on 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-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 lifting and lowering the lifting column.

[0043] A connecting rod 6 is inserted into the gear box 5, and the connecting rod 6 has an outer end portion protruding from the surface of the lifting column; the outer end portion of the connecting rod 6 on the first lifting column 301 is inserted into the motor 1; the outer end portion of the connecting rod 6 on the second lifting column 302 is connected to the flexible connector 7, and the outer end portion of the connecting rod 6 on the second lifting column 302 is inserted into one end of the flexible connector 7, and the end of the transmission rod 2 close to the second lifting column 302 is inserted into 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 facilitates the installation of consumers and also facilitates the design of the flexible connection without considering changing the complex structure of the gear box 5.

[0044] There are many options for the flexible connector 7, which may be a flexible shaft, a flexible coupling or a universal coupling; Figure 8 , 9 As shown, the flexible coupling is a coupling with a flexible body 16 built in, and the shafts connected on both sides thereof can produce a small relative movement, and unlike a rigid coupling that locks the two shafts in the radial direction; 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 transmission-connected by the snap-fitting of the claw part 17 and the groove 18; the two coupling parts 15 are arranged at intervals, and the transmission rod 2 and the transmission assembly are separately connected, 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.

[0045] like Figure 1 , 3 As shown in Figures 4, 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 more basic universal coupling with a relatively simple structure and low cost.

[0046] 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 the present solution increases the number of spline teeth to 12 or even 18. After receiving the lifting table, when the consumer installs and adjusts the transmission rod 2, due to the large number of spline teeth, compared with a structure with a small 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.

[0047] In addition, if Figure 1 , 2As shown in Figures 6 and 7, the motor 1 is also flexibly mounted on the first lifting 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 lifting column 301. The motor 1 is softly connected to the first lifting 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 lifting column; the flexible seat 20 is elastic, and the motor 1 is also flexibly connected to the first lifting column 301, which not only further reduces the transmission of the disturbance 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 lifting column 301.

[0048] 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 arranged, the flexible member 8 is arranged between the transmission wheel 10 and the output member 9, and the transmission rod 2 is inserted in the output member 9; the motor 1 is configured so that the transmission wheel 10 rotates to drive 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 arranging the flexible member 8 between the output member 9 and the transmission wheel 10, the motor 1 can achieve a tight transmission match with the connecting rod 6 and the transmission rod 2, and the transmission rod 2 can be flexibly connected with the connecting rod 6; the flexible member 8 has a first latch tooth 11 and a second latch groove 12, and the transmission wheel 10 has a first latch groove 13 The output member 9 has a second latch tooth 14, the first latch tooth 11 is clamped in the first clamp groove 13, and the second latch tooth 14 is clamped in the second clamp 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 clamp groove, the number of the first latch teeth 11 is 6, and the number of the first latch teeth 11 is evenly distributed along the circumference of the flexible member 8. Similarly, the number of the second latch teeth 14, the first clamp groove 13, and the second clamp groove 12 are all 6, so as to realize 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 and cooperation between the motor 1 and the connecting rod 6 with insufficient straightness.

[0049] 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, and 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, there is no need to consider the straightness of the two individually, and the transmission rod 2 and the two connecting rods 6 as 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.

[0050] Embodiment 2: The difference between this embodiment and embodiment 1 is that the two release members 70 are both flexible connectors 7, which are respectively arranged between the transmission rod 2 and the transmission components of the two lifting columns 3, and the installation position of the motor 1 is also different; specifically: like Figure 10-15 As shown, in the left-right direction, the motor 1 is located near the middle of the beam 22, the motor 1 is sleeved on the transmission rod 2, the transmission rod 2 is arranged between the two lifting columns 3 and is located beside the beam 22; the motor 1 is installed on the beam and is connected to the transmission rod 2 in transmission; flexible connectors 7 are provided at both ends of the transmission rod 2, the transmission rod 2 and the transmission assembly are connected in transmission through the flexible connector 7, and the flexible connector 7 is configured to make the transmission rod 2 flexibly connected to the transmission assembly and release the disturbance generated when the transmission rod 2 rotates.

[0051] The motor 1 is configured to drive the transmission rod 2 to rotate, the transmission rod 2 is configured to link the two lifting columns 3 to rise and fall synchronously, the transmission assembly is configured to drive the lifting columns 3 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 lifting columns 3 to rise and fall, and during the movement of the lifting columns 3, resistance detection will be performed; however, when the transmission rod 2 is connected to the transmission assembly for transmission, 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 influence on the accuracy of resistance detection.

[0052] In the scheme, both ends of the transmission rod 2 are flexibly connected to the transmission components of the two lifting columns 3 through flexible connectors 7, the outer end of the connecting rod 6 is connected to the flexible connector 7, and the outer end of the connecting rod 6 is inserted in one end of the flexible connector 7, and the end of the transmission rod 2 is inserted in the other end of the flexible connector 7; when the straightness requirement of the transmission rod 2 cannot be met, when the transmission rod 2 rotates under the drive of the motor 1, the disturbance generated will be released at the flexible connectors 7 at both ends, that is, in addition to driving the transmission component to move, the two ends of the transmission rod 2 will also generate radial movement relative to the transmission component, and under the action of the flexible connector 7, the radial movement will not be restricted, and the disturbance of the transmission rod 2 will not be transmitted to the transmission component and the lifting column 3 to form vibration and noise, and will not have an adverse effect on the resistance detection, thereby improving the accuracy of the resistance detection and ensuring the safety of the product and the user.

[0053] The motor 1 is mounted on the crossbeam 22, and the motor 1 drives the transmission rod 2 to rotate. It is not necessary to consider whether the motor 1 and the transmission rod 2 are flexibly connected. That is, the above effect can be achieved by hard connection between the motor 1 and the transmission rod 2. However, if the motor 1 and the transmission rod 2 are also flexibly connected, the effect of releasing disturbances and eliminating the adverse effects of disturbances can be further improved. In this embodiment, the motor 1 and the transmission rod 2 are hard connected. Of course, the motor 1 can also be flexibly connected to the transmission rod 2 by an internal flexible member.

[0054] Specifically, if Figure 10-14 As shown, the lifting column 3 includes an inner tube 31 and an outer tube 32. The outer tube 32 is sleeved on the inner tube 31. 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 sensing element 4 is used to detect the retreat when encountering resistance. Generally, a piezoelectric sheet is used as the sensing element 4. The sensing element 4 will generate different waveforms due to the load changes on the lifting column 3. After removing the disturbance of the transmission rod 2, the waveform output by the sensing element 4 can be more stable, so that when resistance actually occurs, the sensing element 4 can accurately judge; the crossbeam 22 includes a mounting plate 23 perpendicular to the transmission rod 2, and the motor 1 is mounted on the mounting plate 23; an avoidance hole 24 is opened on the mounting plate 23, and the transmission rod 2 passes through the avoidance hole 24. The diameter of the avoidance hole 24 is larger than the diameter of the transmission rod 2, and the avoidance hole 24 is used to avoid the transmission rod 2 when disturbance occurs.

[0055] In this embodiment, a universal coupling is used as the flexible connecting member 7, and specifically a single cross universal joint.

[0056] The motor 1 and the mounting plate 23 are also flexibly connected; specifically: like Fig.15As shown, 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 mounting plate 23, and the motor 1 is softly connected to the mounting plate 23 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 connection portion 201 and a main body portion 202, the flexible connection portion 201 is inserted in the mounting hole 21, the main body portion 202 protrudes from the surface of the motor 1, and the main body portion 202 is in contact with the mounting plate 23; the flexible seat 20 is elastic, and the motor 1 and the crossbeam 22 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 mounting plate 23.

[0057] Embodiment 3: The difference between this embodiment and embodiment 2 is that there is only one release member 70, and the release member 70 is arranged in the motor 1, and the release member 70 is a flexible member 8; specifically: like Figure 16-18 As shown, the motor 1 includes a flexible member 8 arranged inside the motor 1, and the flexible member 8 is configured to release the disturbance generated when the transmission rod 2 rotates; in this solution, the two ends of the transmission rod 2 are connected to the transmission components of the two lifting columns 3 through a connecting member 25, and the transmission rod 2 and the transmission component are traditional hard links. When the straightness cannot be met, the transmission rod 2 rotates under the drive of the motor 1, and a disturbance will be generated. The disturbance will be transmitted from the connecting member 25 to the transmission component and the lifting column 3, thereby generating vibration and noise, and further affecting the accuracy of the resistance detection; however, the motor 1 installed on the crossbeam 22 is sleeved on the transmission rod 2, and the motor 1 and the transmission rod 2 are flexibly connected through the flexible member 8 inside the motor 1. The flexible member 8 is connected so that when the transmission rod 2 is disturbed, the disturbance can be released by the flexible member 8, and the transmission rod 2 can swing slightly on the motor 1, so that the transmission at both ends of the transmission rod 2 becomes more stable, and the disturbance will no longer be transmitted to the transmission assembly and the lifting column 3, thereby eliminating the influence of the disturbance on the resistance detection; at the same time, the flexible member 8 also has the effect of reducing vibration and noise, so that the vibration noise transmitted to the motor 1 and the crossbeam 22 by the transmission rod 2 can also be reduced; although the two ends of the transmission rod 2 are restricted in the radial direction, the middle part of the transmission rod 2 is not restricted to death under the action of the flexible member 8, so that the transmission rod 2 can move radially under certain restrictions, thereby releasing the disturbance and eliminating the adverse effect of the disturbance on the resistance detection.

[0058] The connecting piece 25 is a sleeve, and a connecting rod 6 is inserted on the gear box 5. The connecting rod 6 has an outer end protruding from the surface of the lifting column 3; the outer end of the connecting rod 6 is connected to the connecting piece 25, and the outer end of the connecting rod 6 is inserted in one end of the connecting piece 25, and the end of the transmission rod 2 is inserted in the other end of the connecting piece 25; when the consumer receives the lifting table, the connecting rod 6 has been inserted in 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 facilitates the installation of the consumer; the transmission assembly and the transmission rod 2 are connected through a sleeve transmission, which is simple and convenient to implement and has low cost.

[0059] like Fig.16 , 17 As shown, the motor 1 has an output end 101, and 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 arranged in the output end 101, and the flexible member 8 is arranged between the transmission wheel 10 and the output member 9, and the output member 9 is sleeved on the transmission rod 2; 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 arranging the flexible member 8 between the output member 9 and the transmission wheel 10, a flexible connection between the transmission rod 2 and the motor 1 is realized; the flexible member 8 has a first latch tooth 11 and a second latch groove 12, and the transmission wheel 10 has a first latch groove 1 3. The output member 9 has a second latch tooth 14, the first latch tooth 11 is clamped in the first clamp groove 13, and the second latch tooth 14 is clamped in the second clamp 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 clamp groove, the number of the first latch teeth 11 is 6, and they are evenly distributed along the circumference of the flexible member 8. Similarly, the number of the second latch teeth 14, the first clamp groove 13, and the second clamp groove 12 are all 6, so as to realize more stable transmission; the flexible member 8 is soft rubber; the flexible member 8 is elastic, and the soft rubber is arranged in the motor 1 to realize the flexible connection between the transmission rod 2 and the motor 1, and can also provide the effect of shock absorption and energy absorption.

Claims

1. A single-motor lifting table that can retreat when encountering an obstacle, characterized in that: It includes a transmission rod and a lifting table frame, the transmission rod is arranged on the lifting table frame, the lifting table frame includes a motor and a frame assembly, the motor is installed on the frame assembly, the motor has an output end, the transmission rod is inserted in the output end of the motor and is connected to the motor in a transmission manner; the frame assembly includes a crossbeam and two lifting columns arranged at intervals, the two lifting columns are connected to the crossbeam, and the lifting columns are provided with sensing elements for detecting resistance; the two lifting columns each include a transmission assembly, the transmission rod is located between the two lifting columns and is connected to the transmission assembly in a transmission manner, and the transmission rod is configured to link the two lifting columns to rise and fall synchronously; it also includes a release member, the release member is arranged in the motor and / or between the transmission rod and the transmission assembly, the release member is configured to flexibly connect the transmission rod to the lifting table frame and eliminate the influence of the disturbance of the transmission rod on the sensing element.

2. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 1, characterized in that: There are two release members, which are respectively arranged inside the motor and between the transmission rod and the transmission assembly. The release member arranged inside the motor is a flexible member, and the release member arranged between the transmission rod and the transmission assembly is a flexible connecting member. The two lifting columns are the first column and the second column, respectively. The transmission assembly includes a gear box, and a connecting rod is inserted into the gear box. The connecting rod has an outer end protruding from the surface of the lifting column. The motor is installed on the first column, and the outer end of the connecting rod on the first column is inserted into the motor, and the end of the transmission rod close to the first column is inserted into the motor, and the transmission rod and the connecting rod of the first column are flexibly connected through the flexible member inside the motor; the end of the transmission rod close to the second column is inserted into the flexible connecting member, and the outer end of the connecting rod of the second column is inserted into the flexible connecting member, and the transmission rod and the connecting rod of the first column are flexibly connected through the flexible connecting member. The disturbance generated when the transmission rod rotates is released by the flexible member and the flexible connecting member.

3. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 2, characterized in that: A flexible seat is arranged on the motor, one end of the flexible seat is inserted in the motor, the other end of the flexible seat is in contact with the first column, and the motor is softly connected to the first column through the flexible seat.

4. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 1, characterized in that: There are two release members, and the two release members are respectively arranged between the transmission rod and the transmission components of the two columns; the motor is installed on the crossbeam, and in the left and right directions, the motor is located near the middle of the crossbeam, the motor is sleeved on the transmission rod and is connected to the transmission rod in transmission; the transmission component includes a gear box, a connecting rod is inserted into the gear box, and the connecting rod has an outer end protruding from the surface of the lifting column; the two release members are respectively sleeved on the two ends of the transmission rod, and the connecting rods of the two lifting columns are respectively inserted in the two release members located at both ends of the transmission rod, the transmission rod and the connecting rod are connected in transmission through the release members, and the release members are configured to make the transmission rod and the connecting rod flexibly connected and release the disturbance generated when the transmission rod rotates.

5. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 1, characterized in that: There is one release member, and the release member is arranged in the motor. The motor is installed on the crossbeam, and in the left and right directions, the motor is located near the middle of the crossbeam. The motor is sleeved on the transmission rod and is connected to the transmission rod in transmission. The motor includes the release member arranged inside the motor, and the release member is used to release the disturbance generated when the transmission rod rotates. Connecting members are provided at both ends of the transmission rod, and the transmission rod and the transmission assembly are connected in transmission through the connecting members.

6. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 5, characterized in that: The connecting piece is a sleeve, and the transmission assembly includes a gear box. A connecting rod is inserted into the gear box. The connecting rod has an outer end protruding from the surface of the column. One end of the sleeve is plugged into the transmission rod, and the other end of the sleeve is plugged into the outer end of the connecting rod.

7. The single-motor lifting table capable of retreating upon encountering an obstacle according to any one of claims 1 to 4, characterized in that: The release piece arranged between the transmission rod and the transmission assembly is a flexible connecting piece. The transmission assembly includes a gear box, on which a connecting rod is inserted. The connecting rod has an outer end protruding from the surface of the lifting column; the ends of the transmission rod and the outer end of the connecting rod are respectively inserted at both ends of the flexible connecting piece.

8. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 7, characterized in that: The flexible connection is a universal coupling.

9. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 8, characterized in that: The universal coupling is a single cross universal joint.

10. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 7, characterized in that: The flexible connection is a flexible coupling.

11. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 10, 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 a plurality of grooves. The coupling part and the flexible body are transmission connected by the snap-fitting between the claw part and the groove.

12. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 7, characterized in that: The flexible connecting piece is a flexible shaft.

13. The single-motor lifting table capable of retreating upon encountering an obstacle according to any one of claims 1 to 3 and 5, characterized in that: The release member arranged in the motor is a flexible member, and an output member for driving the transmission rod to rotate and a transmission wheel for driving the output member to rotate are arranged in the output end of the motor, the flexible member is arranged between the transmission wheel and the output member, and the transmission rod is inserted in 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.

14. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 13, characterized in that: The flexible member has a first clamping tooth and a second clamping groove, the transmission wheel has a first clamping groove, the output member has a second clamping tooth, the first clamping tooth is clamped in the first clamping groove, and the second clamping tooth is clamped in the second clamping groove.

15. The single-motor lifting table capable of retreating upon encountering an obstacle according to claim 1, characterized in that: The transmission rod comprises an external spline sleeve located at both ends thereof, and the number of the spline teeth is at least 12.

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