Electric lifting table with resistance detection function

Abstract

The utility model discloses an electric lifting table with resistance detection, which comprises a table plate, a cross beam component and two lifting upright posts, the cross beam component is fixed on the bottom surface of the table plate, a motor and two gear transmission assemblies are mounted on the cross beam component, and the motor is in transmission connection with the two gear transmission assemblies through transmission shafts; the lifting stand column comprises a stand column connecting frame. The gear transmission assembly comprises a cross beam connecting frame; a resistance sensor is arranged on the cross beam connecting frame, and the resistance sensor is configured to sense deformation of the cross beam connecting frame and output an electric signal. The resistance sensor is installed on the cross beam connecting frame, when the electric lifting table encounters an obstacle in the ascending or descending process, the cross beam connecting frame deforms, and the resistance sensor can output an electric signal when sensing the deformation of the cross beam connecting frame, so that the electric lifting table stops ascending or descending according to the electric signal; the table plate is prevented from extruding and damaging obstacles.

Description

Technical Field

[0001] The utility model belongs to the field of lifting equipment, and in particular relates to an electric lifting table with resistance detection function. Background Art

[0002] At present, single-motor electric lift tables on the market generally have deformable sensing components installed inside the lifting column. The sensing components detect obstacles by detecting the force deformation between the lifting assembly and the pipe fittings inside the lifting column. However, installing the sensing components inside the lifting column is not only difficult to assemble, but also difficult to repair when damaged. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an electric lifting table with resistance detection function, so as to solve the problem that the resistance sensor arranged in the lifting column is difficult to install and repair.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an electric lifting table with resistance detection, comprising: a table top, a beam assembly and two lifting columns, the beam assembly is fixed to the bottom surface of the table top, a motor and two gear transmission assemblies are installed on the beam assembly, and the motor and the two gear transmission assemblies are connected through a transmission shaft; wherein the lifting column comprises a screw transmission assembly, a first coupling connecting the screw transmission assembly and a column connecting frame arranged at the top of the lifting column; the gear transmission assembly comprises a gear transmission assembly, a second coupling connecting the gear transmission assembly and a beam connecting frame for fixing the beam assembly; the column connecting frame is connected to the beam connecting frame, and the first coupling and the second coupling are coupled for transmission; an resistance sensor is provided on the beam connecting frame, the resistance sensor is configured to sense the deformation of the beam connecting frame and output an electrical signal, and the resistance sensor is at least partially located in the non-overlapping area of ​​the beam connecting frame with the column connecting frame. This technical solution has the following technical effects:

[0005] The utility model can reduce the packaging volume of the lifting column and facilitate the transportation and installation of the lifting column by separating the screw drive assembly used for transmission and the gear drive assembly and the motor used to drive the screw drive assembly in the lifting column of the electric lifting table. The gear drive assembly is installed on the crossbeam assembly so that the gear drive assembly can transmit between the drive shaft and the lifting column. The single motor can drive the two gear drive assemblies at both ends of the drive shaft through the drive shaft to control the simultaneous lifting of the two lifting columns. The gear drive assembly is fixed to the crossbeam through a crossbeam connecting frame, and the resistance sensor is installed on the crossbeam connecting frame. Because the crossbeam assembly and the column connecting frame are connected through the crossbeam connecting frame, the crossbeam connecting frame directly bears pressure on the crossbeam assembly. When the electric lifting table encounters an obstacle (object or human body) during the rising or falling process, the obstacle applies resistance to the table board to prevent the table board from rising or falling. When the table continues to rise or fall, the resistance is transmitted from the table top to the crossbeam assembly, and then to the crossbeam connecting frame through the crossbeam assembly, thereby causing the crossbeam connecting frame to deform. The resistance sensor can output an electrical signal when sensing the deformation of the crossbeam connecting frame, so that the electric lifting table stops rising or falling according to the electrical signal. Compared with setting the resistance sensor in the lifting column, setting the resistance sensor on the crossbeam connecting frame can greatly shorten the time for the resistance to be transmitted to the resistance sensor, so that the resistance sensor can detect obstacles faster, improve the response speed of resistance detection, avoid the table top from squeezing and damaging obstacles, and ensure the safety of users when the obstacle is a human body. Because the crossbeam connecting frame is located outside the lifting column, the resistance sensor is also installed outside the lifting column, which can stop the lifting of the lifting column when encountering resistance, and also facilitate the installation and maintenance of the resistance sensor, reducing maintenance costs. Because the overlap between the column connecting frame and the beam connecting frame will enhance the strength of the overlapping area of ​​the beam connecting frame, the non-overlapping area of ​​the beam connecting frame and the column connecting frame is more prone to deformation. The resistance sensor is at least partially set in the non-overlapping area of ​​the beam connecting frame and the column connecting frame so that the resistance sensor can quickly capture the deformation of the beam connecting frame at the moment the table top encounters resistance, making the resistance sensor more sensitive to the deformation detection of the beam connecting frame.

[0006] In the above-mentioned electric lifting table with obstacle detection, the crossbeam connecting frame includes a fixedly connected protective shell and a connecting plate, the protective shell cover is arranged on the outside of the gear transmission assembly, the connecting plate extends horizontally and is respectively connected to the crossbeam assembly and the column connecting frame, and the obstacle sensor is arranged on the connecting plate. By setting the crossbeam connecting frame as a structure combining the protective shell and the connecting plate, the protective shell can protect the gear transmission assembly, and at the same time, the connecting plate can be used to connect the crossbeam assembly and the column connecting frame. Because the connecting plate is more easily deformed than the protective shell when the table board encounters an obstacle, the obstacle sensor is arranged on the connecting plate, so that the obstacle sensor is more sensitive to the detection of obstacles.

[0007] In the above-mentioned electric lifting table with resistance detection, the protective shell includes a side panel surrounding the gear transmission assembly and a top panel installed on the top of the side panel, the side panel and the top panel are split structures, and the gear transmission assembly is detachably connected to the top panel. The structure of the top panel and the side panel arranged separately makes it possible to repair or replace the gear transmission assembly by simply removing the top panel from the side panel and then separating the detachably connected gear transmission assembly from the top panel without removing the side panel, thereby reducing the difficulty of repairing the gear transmission assembly.

[0008] In the above-mentioned electric lifting table with resistance detection, the lifting column also includes a pipe fitting sleeved on the outside of the screw drive assembly, and the top of the pipe fitting is provided with an outer flange, which extends horizontally to form a column connecting frame. By flanging the top of the pipe fitting outward to form the column connecting frame, the column connecting frame and the pipe fitting are an integrated structure, the connection strength between the column connecting frame and the pipe fitting is enhanced, and the pipe fitting can be firmly fixed to the bottom of the connecting plate through the outer flange, and the connection is more stable and reliable.

[0009] In the above-mentioned electric lifting table with resistance detection, the connecting plate includes an installation area overlapping with the outer flange and a deformation area not overlapping with the outer flange, and all resistance sensors are located in the deformation area. Because the deformation area has no overlapping outer flange to increase strength, it is easier to deform quickly when the table top encounters an obstacle during lifting. Therefore, all resistance sensors are located in the deformation area to improve the detection sensitivity of the resistance sensors to obstacles.

[0010] In the above-mentioned electric lifting table with resistance detection, the beam assembly includes two parallel beams, the protective shell is located between the two beams, and the two ends of the connecting plate are respectively fixed to the two beams through locking members. The protective shell is located between the two beams to cover the gear transmission assembly above the lifting column, and the two ends of the connecting plate are respectively fixed to the two beams, so that the installation of the beam connecting frame on the beam is more stable and reliable.

[0011] In the above-mentioned electric lifting table with resistance detection, the resistance sensor is a strain sensor; or the resistance sensor is a piezoelectric sensor, so that the resistance sensor has higher detection sensitivity and detection accuracy, and at the same time, the resistance sensor has higher reliability, and the service life of the resistance sensor is extended.

[0012] In the above-mentioned electric lifting table with resistance detection, the gear transmission assembly includes a box body and a driving gear and a transmission gear arranged in the box body, the driving gear is connected to the end of the transmission shaft, the transmission gear is connected to the second coupling, and the driving gear is meshed with the transmission gear. When the motor drives the transmission shaft to rotate, the two ends of the transmission shaft respectively drive the driving gears of the two gear transmission assemblies to rotate, the driving gear drives the transmission gear to rotate by meshing with the transmission gear, the transmission gear drives the second coupling to rotate, and the second coupling drives the first coupling to rotate, so that the screw of the screw transmission assembly rotates. Through a simple structure, the rotation of the horizontally arranged transmission shaft is converted into the rotation of the vertically arranged screw, and the operation is stable and reliable.

[0013] In the above-mentioned electric lifting table with resistance detection, a positioning plate is installed on the crossbeam assembly, and the motor is installed on the positioning plate and connected to the transmission shaft to drive the transmission shaft to rotate. The positioning plate provides an installation position for the motor, which facilitates the quick installation of the motor and reduces the difficulty of assembling the motor.

[0014] The features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a three-dimensional diagram of the electric lifting table with resistance detection of the utility model when the table top is not installed;

[0017] Figure 2 It is a partial schematic diagram of the electric lifting table with resistance detection of the utility model;

[0018] Figure 3 This is an exploded view of the gear transmission assembly and the lifting column;

[0019] Figure 4 It is a partial cross-sectional view of the electric lifting table with resistance detection of the utility model;

[0020] Figure 5 An exploded view of the gear transmission assembly.

[0021] Reference numerals:

[0022] 100, beam assembly; 110, first beam; 120, second beam; 130, positioning plate;

[0023] 200, lifting column; 210, pipe fitting; 220, screw drive assembly; 230, first coupling; 240, column connecting frame; 241, outer flange;

[0024] 300, gear transmission assembly; 310, gear transmission assembly; 311, housing; 312, driving gear; 313, transmission gear; 320, second coupling; 330, beam connecting frame; 331, protective shell; 3311, side plate; 3312, top plate; 332, connecting plate; 3321, installation area; 3322, deformation area;

[0025] 400, resistance sensor;

[0026] 500, motor;

[0027] 600. Drive shaft. DETAILED DESCRIPTION

[0028] The utility model proposes an electric lifting table with resistance detection, comprising: a table top, a beam assembly and two lifting columns, the beam assembly is fixed to the bottom surface of the table top, a motor and two gear transmission assemblies are installed on the beam assembly, and the motor and the two gear transmission assemblies are connected by transmission shaft transmission; wherein the lifting column comprises a screw transmission assembly, a first coupling connecting the screw transmission assembly and a column connecting frame arranged on the top of the lifting column; the gear transmission assembly comprises a gear transmission assembly, a second coupling connecting the gear transmission assembly and a beam connecting frame for fixing the beam assembly; the column connecting frame is connected to the beam connecting frame, and the first coupling and the second coupling are coupled for transmission; an resistance sensor is provided on the beam connecting frame, the resistance sensor is configured to sense the deformation of the beam connecting frame and output an electrical signal, and the resistance sensor is at least partially located in an area on the beam connecting frame that does not overlap with the column connecting frame. The utility model can reduce the packaging volume of the lifting column and facilitate the transportation and installation of the lifting column by separating the screw drive assembly used for transmission and the gear drive assembly and the motor used to drive the screw drive assembly in the lifting column of the electric lifting table. The gear drive assembly is installed on the crossbeam assembly so that the gear drive assembly can transmit between the drive shaft and the lifting column. The single motor can drive the two gear drive assemblies at both ends of the drive shaft through the drive shaft to control the simultaneous lifting of the two lifting columns. The gear drive assembly is fixed to the crossbeam through a crossbeam connecting frame, and the resistance sensor is installed on the crossbeam connecting frame. Because the crossbeam assembly and the column connecting frame are connected through the crossbeam connecting frame, the crossbeam connecting frame directly bears pressure on the crossbeam assembly. When the electric lifting table encounters an obstacle (object or human body) during the rising or falling process, the obstacle applies resistance to the table board to prevent the table board from rising or falling. When the table continues to rise or fall, the resistance is transmitted from the table top to the crossbeam assembly, and then to the crossbeam connecting frame through the crossbeam assembly, thereby causing the crossbeam connecting frame to deform. The resistance sensor can output an electrical signal when sensing the deformation of the crossbeam connecting frame, so that the electric lifting table stops rising or falling according to the electrical signal. Compared with setting the resistance sensor in the lifting column, setting the resistance sensor on the crossbeam connecting frame can greatly shorten the time for the resistance to be transmitted to the resistance sensor, so that the resistance sensor can detect obstacles faster, improve the response speed of resistance detection, avoid the table top from squeezing and damaging obstacles, and ensure the safety of users when the obstacle is a human body. Because the crossbeam connecting frame is located outside the lifting column, the resistance sensor is also installed outside the lifting column, which can stop the lifting of the lifting column when encountering resistance, and also facilitate the installation and maintenance of the resistance sensor, reducing maintenance costs. Because the overlap between the column connecting frame and the beam connecting frame will enhance the strength of the overlapping area of ​​the beam connecting frame, the non-overlapping area of ​​the beam connecting frame and the column connecting frame is more prone to deformation. The resistance sensor is at least partially set in the non-overlapping area of ​​the beam connecting frame and the column connecting frame so that the resistance sensor can quickly capture the deformation of the beam connecting frame at the moment the table top encounters resistance, making the resistance sensor more sensitive to the deformation detection of the beam connecting frame.

[0029] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Embodiment 1:

[0035] Electric lift tables with resistance detection, such as Figures 1 to 5 As shown, it includes a table top, a beam assembly 100 and two lifting columns 200. The beam assembly 100 is fixed to the bottom surface of the table top by locking screws. A motor 500 and two gear transmission assemblies 300 are installed on the beam assembly 100. The two gear transmission assemblies 300 are respectively arranged at both ends of the beam assembly 100. The motor 500 is connected to the transmission shaft 600 to drive the transmission shaft 600 to rotate. The two ends of the transmission shaft 600 are respectively connected to the two gear transmission assemblies 300, so that the motor 500 and the two gear transmission assemblies 300 are transmitted through the transmission shaft 600. The lifting column 200 includes a pipe fitting 210, a screw drive assembly 220, a first coupling 230 and a column connecting frame 240. The pipe fitting 210 is a hollow structure for accommodating the screw drive assembly 220. The screw drive assembly 220 drives the pipe fitting 210 to extend and retract to achieve the rise or fall of the lifting column 200. The first coupling 230 is installed on the top of the screw drive assembly 220, and the column connecting frame 240 is arranged on the top of the pipe fitting 210. The gear transmission assembly 300 includes a gear transmission component 310, a second coupling 320 and a beam connecting frame 330. The beam connecting frame 330 is fixedly connected to the beam assembly 100 by locking screws. The gear transmission component 310 is installed on the beam connecting frame 330. The transmission shaft 600 is connected to the input end of the gear transmission component 310. The second coupling 320 is connected to the output end of the gear transmission component 310. The column connecting frame 240 is fixed to the bottom of the beam connecting frame 330 by locking screws, and the first coupling 230 is coupled to the second coupling 320.

[0036] When the transmission shaft 600 rotates under the drive of the motor 500, the transmission shaft 600 drives the second coupling 320 to rotate through the gear transmission assembly 310, and the second coupling 320 drives the first coupling 230 to rotate, and then transmits the rotation to the screw transmission assembly 220 through the first coupling 230, so as to realize the rise or fall of the lifting column 200, and the crossbeam connecting frame 330 partially overlaps with the column connecting frame 240. That is, the projection of the column connecting frame 240 on the horizontal plane is located within the projection of the crossbeam connecting frame 330 on the horizontal plane. The crossbeam connecting frame 330 is provided with an obstacle sensor 400 connected to the controller, and the obstacle sensor 400 is at least partially located in the area where the crossbeam connecting frame 330 does not overlap with the column connecting frame 240. When the electric lifting table encounters an obstacle during the process of rising or falling, the obstacle prevents the table top from continuing to rise or fall, thereby causing the beam connecting frame 330 to deform. The resistance sensor 400 can output an electrical signal when sensing the deformation of the beam connecting frame 330. When receiving the electrical signal, the controller controls the electric lifting table to stop rising or falling.

[0037] The utility model can reduce the packaging volume of the lifting column 200 and facilitate the transportation and installation of the lifting column 200 by separately arranging the screw transmission assembly 220 used for transmission and the gear transmission assembly 300 and the motor 500 used for driving the screw transmission assembly 220 in the lifting column 200 of the electric lifting table. The gear transmission assembly 300 is installed on the crossbeam assembly 100, so that the gear transmission assembly 300 can transmit between the transmission shaft 600 and the lifting column 200. The single motor 500 can drive the two gear transmission assemblies 300 at both ends of the transmission shaft 600 through the transmission shaft 600 to control the simultaneous lifting of the two lifting columns 200. The gear transmission assembly 300 is fixed to the crossbeam through the crossbeam connecting frame 330, and the resistance sensor 400 is installed on the crossbeam connecting frame 330. Because the crossbeam assembly 100 and the column connecting frame 240 are connected through the crossbeam connecting frame 330, the crossbeam connecting frame 330 directly bears pressure on the crossbeam assembly 100. When the electric lifting table encounters an obstacle (object or human body) during the rising or falling process, the obstacle applies resistance to the table top. The force is used to prevent the table top from continuing to rise or fall. The resistance is transmitted from the table top to the beam assembly 100, and then to the beam connecting frame 330 through the beam assembly 100, so that the beam connecting frame 330 installed at the bottom of the table top is deformed. The resistance sensor 400 can output an electrical signal when sensing the deformation of the beam connecting frame 330, so that the electric lifting table stops rising or falling according to the electrical signal. Compared with setting the resistance sensor 400 in the lifting column 200, setting the resistance sensor 400 on the beam connecting frame 330 can greatly shorten the time for the resistance to be transmitted to the resistance sensor 400, so that the resistance sensor 400 can detect obstacles more quickly, improve the response speed of the resistance detection, avoid the table top squeezing and damaging the obstacle, and ensure the safety of the user when the obstacle is a human body. Because the cross beam connecting frame 330 is located outside the lifting column 200, the resistance sensor 400 is also installed outside the lifting column 200, so that the lifting column 200 stops lifting when encountering resistance, and it is also convenient to install and repair the resistance sensor 400, thereby reducing the maintenance cost. Because the overlap between the column connecting frame 240 and the cross beam connecting frame 330 will enhance the strength of the overlapping area of ​​the cross beam connecting frame 330, the non-overlapping area of ​​the cross beam connecting frame 330 and the column connecting frame 240 is more likely to deform. The resistance sensor 400 is at least partially arranged in the non-overlapping area of ​​the cross beam connecting frame 330 and the column connecting frame 240, so that the resistance sensor 400 can quickly capture the deformation of the cross beam connecting frame 330 when the table top encounters resistance, so that the resistance sensor 400 is more sensitive to the deformation detection of the cross beam connecting frame 330.

[0038] like Figure 3As shown, the beam connecting frame 330 includes a protective shell 331 and a connecting plate 332. The protective shell 331 is covered on the outside of the gear transmission assembly 300 to protect the gear transmission assembly 300. The connecting plate 332 is arranged around the protective shell 331. The protective shell 331 and the connecting plate 332 are fixedly connected. The connecting plate 332 extends horizontally from the outer wall of the protective shell 331 in a direction away from the protective shell 331. The top of the connecting plate 332 is against the beam assembly 100 and is locked and fixed to the beam assembly 100 by locking screws. The bottom of the connecting plate 332 is against the column connecting frame 240 and is locked and fixed to the column connecting frame 240 by locking screws. The resistance sensor 400 is arranged on the connecting plate 332. By setting the crossbeam connecting frame 330 to a structure combining a protective shell 331 and a connecting plate 332, the protective shell 331 can protect the gear transmission assembly 300. At the same time, the connecting plate 332 can be used to connect the crossbeam assembly 100 and the column connecting frame 240. Because the connecting plate 332 is more easily deformed than the protective shell 331 when the table top encounters an obstacle, the obstacle sensor 400 is arranged on the connecting plate 332, so that the obstacle sensor 400 is more sensitive to obstacle detection. The protective shell 331 and the connecting plate 332 in this embodiment can be integrally formed, fixed by welding, or fixed by a locking member.

[0039] In this embodiment, if Figure 3 and Figure 4 As shown, the protective shell 331 includes a side plate 3311 and a top plate 3312 which are separately arranged. The side plate 3311 surrounds the circumference of the gear transmission assembly 300, and the top plate 3312 is fixedly connected to the top of the side plate 3311 to form a accommodating cavity below the top plate 3312 together with the side plate 3311. The gear transmission assembly 300 is arranged in the accommodating cavity, and the top of the gear transmission assembly 300 is installed on the top plate 3312. The gear transmission assembly 300 and the top plate 3312 are detachably connected. The structure of the separately arranged top plate 3312 and the side plate 3311 makes it possible for the gear transmission assembly 300 to be repaired or replaced by simply removing the top plate 3312 from the side plate 3311 when the gear transmission assembly 300 fails or is damaged, and then the detachably connected gear transmission assembly 300 and the top plate 3312 are separated, without removing the side plate 3311, thereby reducing the difficulty of repairing the gear transmission assembly 300.

[0040] An outer flange 241 is provided on the top of the pipe fitting 210 in this embodiment, and the outer flange 241 extends horizontally in a direction away from the pipe fitting 210 to form a column connecting frame 240. The outer flange 241 is fitted with the bottom surface of the connecting plate 332 and fixed by locking screws. By flanging the top of the pipe fitting 210 outward to form the column connecting frame 240, the column connecting frame 240 and the pipe fitting 210 are integrated into a structure, thereby enhancing the connection strength between the column connecting frame 240 and the pipe fitting 210. The pipe fitting 210 can be firmly fixed to the bottom of the connecting plate 332 through the outer flange 241, and the connection is more stable and reliable. The width of the outer flange 241 is smaller than the width of the connecting plate 332, so that the connecting plate 332 includes an installation area 3321 overlapping with the outer flange 241 and a deformation area 3322 not overlapping with the outer flange 241. The deformation area 3322 is arranged on the outside of the installation area 3321 away from the pipe 210. Because the deformation area 3322 does not overlap the outer flange 241 to increase the strength, it is easier to deform quickly when the table top encounters an obstacle during lifting and lowering. Therefore, it is preferred that the resistance sensor 400 is entirely located in the deformation area 3322 to improve the detection sensitivity of the resistance sensor 400 to obstacles. The resistance sensor 400 in this embodiment can be a strain sensor or a piezoelectric sensor, so that the resistance sensor 400 has a higher detection sensitivity and detection accuracy, and at the same time, the resistance sensor 400 has a higher reliability and extends the service life of the resistance sensor 400.

[0041] like Figure 1 As shown, in this embodiment, the beam assembly 100 includes a first beam 110 and a second beam 120 arranged in parallel, and a protective shell 331 is located between the two beams to cover the gear transmission assembly 300 above the lifting column 200. The two ends of the connecting plate 332 are respectively fixed to the two beams by locking parts such as locking screws, so that the installation of the entire beam connecting frame 330 on the beam assembly 100 is more stable and reliable.

[0042] like Figure 4 and Figure 5As shown, the gear transmission assembly 310 includes a housing 311, a driving gear 312 and a transmission gear 313. The driving gear 312 and the transmission gear 313 are arranged in the housing 311. The end of the transmission shaft 600 passes through the side plate 3311 of the protective shell 331 and is connected to the driving gear 312. The transmission shaft 600 can drive the driving gear 312 to rotate. The driving gear 312 and the transmission gear 313 are meshed. The transmission gear 313 is connected to the second coupling 320. The transmission gear 313 can drive the second coupling 320 to rotate. Preferably, the transmission gear 313 and the second coupling 320 are an integrated structure to simplify the structure and assembly steps of the gear transmission assembly 310. When the motor 500 drives the transmission shaft 600 to rotate, the two ends of the transmission shaft 600 respectively drive the driving gears 312 of the two gear transmission assemblies 310 to rotate, the driving gear 312 drives the transmission gear 313 to rotate by meshing with the transmission gear 313, the transmission gear 313 drives the second coupling 320 to rotate, the second coupling 320 drives the first coupling 230 to rotate, so that the screw of the screw transmission assembly 220 rotates. Through a simple structure, the rotation of the horizontally arranged transmission shaft 600 is converted into the rotation of the vertically arranged screws in the two lifting columns 200, and the operation is stable and reliable.

[0043] A positioning plate 130 located between the two lifting columns 200 is also installed on the beam assembly 100 in this embodiment. The motor 500 is installed on the positioning plate 130. The output end of the motor 500 is connected to the transmission shaft 600 to drive the transmission shaft 600 to rotate. The setting of the positioning plate 130 provides an installation position for the motor 500, which facilitates the quick installation of the motor 500 and reduces the difficulty of assembling the motor 500.

[0044] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. Electric lifting table with resistance detection, including: A table top, a crossbeam assembly and two lifting columns, wherein the crossbeam assembly is fixed to the bottom surface of the table top, a motor and two gear transmission assemblies are installed on the crossbeam assembly, and the motor and the two gear transmission assemblies are connected through a transmission shaft; The lifting column comprises a screw transmission assembly, a first coupling connected to the screw transmission assembly, and a column connecting frame arranged on the top of the lifting column; the gear transmission assembly comprises a gear transmission component, a second coupling connected to the gear transmission component, and a beam connecting frame for fixing the beam component; the column connecting frame is connected to the beam connecting frame, and the first coupling and the second coupling are coupled for transmission; It is characterized in that an resistance sensor is provided on the beam connecting frame, and the resistance sensor is configured to sense the deformation of the beam connecting frame and output an electrical signal, and the resistance sensor is at least partially located in an area on the beam connecting frame that does not overlap with the column connecting frame.

2. The electric lifting table with resistance detection according to claim 1, characterized in that: The crossbeam connecting frame includes a fixedly connected protective shell and a connecting plate, the protective shell cover is arranged on the outside of the gear transmission assembly, the connecting plate extends horizontally and is respectively connected to the crossbeam assembly and the column connecting frame, and the resistance sensor is arranged on the connecting plate.

3. The electric lifting table with resistance detection according to claim 2, characterized in that: The protective shell includes a side plate surrounding the gear transmission assembly and a top plate installed on the top of the side plate. The side plate and the top plate are separate structures, and the gear transmission assembly is detachably connected to the top plate.

4. The electric lifting table with resistance detection according to claim 2, characterized in that: The lifting column also includes a pipe fitting sleeved on the outside of the screw drive assembly, and the top of the pipe fitting is provided with an outer flange, and the outer flange extends horizontally to form the column connecting frame.

5. The electric lifting table with resistance detection according to claim 4, characterized in that: The connecting plate includes an installation area overlapping with the outer flange and a deformation area not overlapping with the outer flange, and all of the resistance sensors are located in the deformation area.

6. The electric lifting table with resistance detection according to claim 2, characterized in that: The crossbeam assembly includes two crossbeams arranged in parallel, the protective shell is located between the two crossbeams, and the two ends of the connecting plate are respectively fixed to the two crossbeams through locking pieces.

7. The electric lifting table with resistance detection according to claim 1, characterized in that: The resistance sensor is a strain sensor; or, the resistance sensor is a piezoelectric sensor.

8. The electric lifting table with resistance detection according to claim 1, characterized in that: The gear transmission assembly includes a housing, a driving gear and a transmission gear arranged in the housing, the driving gear is connected to the end of the transmission shaft, the transmission gear is connected to the second coupling, and the driving gear is meshed with the transmission gear.

9. The electric lifting table with resistance detection according to claim 1, characterized in that: A positioning plate is installed on the crossbeam assembly, and the motor is installed on the positioning plate and connected to the transmission shaft to drive the transmission shaft to rotate.

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