WO2023241178A1 - 具有遇阻检测功能的升降立柱及电动升降机构 - Google Patents

具有遇阻检测功能的升降立柱及电动升降机构 Download PDF

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Publication number
WO2023241178A1
WO2023241178A1 PCT/CN2023/086401 CN2023086401W WO2023241178A1 WO 2023241178 A1 WO2023241178 A1 WO 2023241178A1 CN 2023086401 W CN2023086401 W CN 2023086401W WO 2023241178 A1 WO2023241178 A1 WO 2023241178A1
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WO
WIPO (PCT)
Prior art keywords
sensor
obstruction detection
detection plate
lifting column
assembly hole
Prior art date
Application number
PCT/CN2023/086401
Other languages
English (en)
French (fr)
Inventor
周少萍
陈雪莉
陈超峰
Original Assignee
浙江捷昌线性驱动科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 浙江捷昌线性驱动科技股份有限公司 filed Critical 浙江捷昌线性驱动科技股份有限公司
Publication of WO2023241178A1 publication Critical patent/WO2023241178A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/20—Telescopic guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges

Definitions

  • the present invention relates to the field of linear actuators, and in particular to a lifting column and an electric lifting mechanism with a resistance detection function.
  • Electric lifting mechanisms such as lifting tables and lifting beds, have lifting functions.
  • the electric lifting mechanism includes a platform and a lifting column that drives the platform to rise and fall. If an obstacle is encountered during the lifting of the platform, the platform will contact the obstacle and generate an interaction force when the lifting column continues to drive the platform up and down. The force will be transmitted to the lifting column through the platform. If the lifting column does not stop immediately, the platform will Or the lifting column may be damaged by obstacles; if the obstacle is a human body, the human body may be injured.
  • existing electric lifting mechanisms are equipped with an obstruction detection mechanism capable of detecting obstruction.
  • the resistance detection mechanism with higher sensitivity uses components that can convert between pressure signals and electrical signals as resistance detection components.
  • the deformation stress generated is not enough to cause the obstruction detection element to generate an obstruction alarm. Only after a period of time after the collision between the platform and the obstacle can sufficient deformation stress be generated. Large deformation stress triggers the resistance detection element, and the resistance response speed of the electric lifting mechanism is too slow.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and propose a lifting column with an obstruction detection function.
  • the sensor is easy to disassemble and assemble, and can detect obstruction within a short time when obstruction occurs, thereby improving the efficiency of the lifting column. Response speed when encountering obstacles.
  • the present invention adopts the following technical solutions:
  • a lifting column with an obstruction detection function includes a screw rod and an obstruction detection plate arranged on the screw rod.
  • the obstruction detection plate is provided with an assembly hole, and the screw rod penetrates the assembly hole.
  • Obstacle detection A sensor for detecting the deformation stress of the obstruction detection plate is provided on the board.
  • a fixing part for fixing and installing the obstruction detection plate is provided on both sides of the sensor. The two ends of the sensor are connected to the center of the assembly hole. The central angle formed by the connecting line is less than 360°, and the perpendicular line connecting the centers of the two fixed parts passes through the sensor.
  • the distance between the sensor and the assembly hole is smaller than the distance between the sensor and the edge of the obstruction detection plate.
  • the fixing part is provided close to the edge of the obstruction detection plate.
  • the assembly hole is provided at the center of the obstruction detection plate.
  • the distance between the sensor and the assembly hole is smaller than the distance between the sensor and the fixing part.
  • the distance between the fixing part and the assembly hole is the same.
  • the obstruction detection plate is provided with two fixing parts, and the two fixing parts are symmetrical with respect to the center of the circle of the assembly hole.
  • the obstruction detection plate is provided with at least three fixing parts.
  • the length of the center line connecting two adjacent fixing parts is L
  • the length of the sensor is At least partially located between the two fixed parts with the largest L; alternatively, the obstruction detection plate is provided with at least three fixed parts evenly distributed around the periphery of the assembly hole, in the circumferential direction of the assembly hole, the The sensor is located between any two adjacent fixed parts.
  • the lifting column further includes a motor box for driving the screw rod, the resistance detection plate is a bearing plate provided on the motor box, and the fixing part connects the resistance detection plate to the motor box. Resistance detection board fixed on the motor box.
  • the fixing part is a buckle that snaps with the motor box; or the fixing part includes a fixing hole provided on the obstruction detection plate and a fixing hole passing through the fixing hole and the motor box.
  • the motor box is fixedly connected with fasteners.
  • the senor is a strain gauge or a piezoelectric element pasted on the resistance detection plate.
  • the electric lifting mechanism includes a lifting platform and the lifting column with the obstruction detection function disclosed in any of the above solutions.
  • the lifting column is used to control the lifting movement of the lifting platform.
  • the invention discloses a lifting column with a resistance detection function.
  • the resistance detection function has high sensitivity and high safety performance and reliability.
  • the lifting column is installed on the equipment to drive the equipment or a certain part of the equipment to perform lifting movements (for example, it is installed on a lifting table to control the lifting of the table body or table board of the lifting table). If obstacles are encountered during the lifting movement When the object is moved, the screw rod will transmit the axial force it receives to the obstruction detection plate, causing the obstruction detection plate to deform due to force, triggering the sensor and detecting the obstruction of the lifting column.
  • the fixed part is used to fix and install the obstruction detection board.
  • the obstruction detection board near the fixed part has the largest rigidity on the obstruction detection board. The farther away from the fixed part, the weaker the rigidity.
  • the area where the mid-perpendicular line connecting the centers of the two fixed parts is located is the area with the weakest comprehensive rigidity between the two fixed parts.
  • the sensor is arranged here so that the sensor can detect resistance faster, thus improving the lifting efficiency. The sensitivity of the column obstruction detection function.
  • the sensor When the sensor is assembled on the resistance detection board, it does not need to pass through the screw rod. It can be installed on the resistance detection board first and then assemble the screw rod, or the resistance detection board can be assembled on the screw rod first and then the sensor can be installed. In addition, when the sensor fails, there is no need to separate the resistance detection board and the screw rod. The sensor can be disassembled or replaced directly from the resistance detection board, making it more convenient to use.
  • the distance between the sensor and the assembly hole is smaller than the distance between the sensor and the edge of the obstruction detection plate.
  • the sensor usually consists of an electronic component with a detection function and a housing or bracket carrying the electronic component.
  • the distance between the sensor and the fixed part actually refers to the distance between the center of the electronic component in the sensor and the center of the fixed part.
  • the fixing part is disposed close to the edge of the obstruction detection plate.
  • the position where the fixed part is set on the obstruction detection plate has strengthened the rigidity and makes it difficult to deform and generate deformation stress when encountering obstruction.
  • the assembly hole is provided at the center of the obstruction detection plate.
  • the center of the obstruction detection plate is the position with the weakest stiffness of the entire obstruction detection plate. At the same time, a large distance is maintained between the assembly hole and the fixed part.
  • the assembly hole is set at the center of the obstruction detection plate so that the assembly hole
  • the surrounding resistance detection plate is the position that deforms the most when it encounters resistance, reducing the time it takes for the sensor to detect resistance.
  • the distance between the sensor and the assembly hole is smaller than the distance between the sensor and the fixing part.
  • the fixed part has the effect of strengthening the stiffness of the resistance detection plate. In order for the sensor to detect resistance in a short time, the sensor needs to be set at a location where deformation stress is concentrated. Setting the fixed part away from the sensor can reduce the fixation of the sensor. The influence of the external part is to increase the speed at which the sensor detects obstruction.
  • the assembly hole is located on the mid-perpendicular line connecting the center of the fixed part, that is, the assembly hole is located in the area with the weakest stiffness on the obstruction detection plate, so as to improve the resistance detection plate around the assembly hole when the lifting column encounters obstruction in the early stages.
  • the amount of deformation triggers the sensor to generate a resistance signal.
  • the two sensors there are two sensors, and a perpendicular line connecting the centers of the two fixing parts passes through at least one of the sensors.
  • the two sensors can detect the stress in different areas of the resistance detection board. Analyzing the signal data of the two sensors can improve the accuracy of obstruction detection and reduce false alarms.
  • the other sensor can also be used alone for obstruction detection.
  • At least one of the sensors is arranged in the area where the deformation stress is concentrated on the resistance detection plate to ensure the response speed of the lifting column when it encounters resistance.
  • two sensors are arranged spaced apart from the assembly holes. Since the position where the equipment for installing the lifting column encounters obstruction is not fixed, when obstruction occurs at different locations, the direction of the force transmitted by the screw rod to the obstruction detection plate is also different. When the force of the screw rod is directed toward one side of the assembly hole During transfer, there is a difference in the amount of deformation on both sides of the assembly hole. There will be a delay when the sensor on the other side detects resistance. Sensors are installed on both sides of the assembly hole to increase the detection range of the sensor. In this way, the screw rod No matter which direction the force is applied, the sensor can quickly detect obstruction in a short time.
  • the obstruction detection plate is provided with two fixing parts, and the two fixing parts are symmetrical with respect to the center of the circle of the assembly hole.
  • the distance between the two fixed parts and the assembly hole is the same, and the assembly hole is located at the midpoint of the central connection between the two fixed parts, so that the obstruction detection plate around the assembly hole is a stress concentration area to ensure the sensor's obstruction detection speed.
  • the obstruction detection plate is provided with at least three fixed parts.
  • the length of the center line connecting two adjacent fixed parts is L, and at least part of the sensor is located at L. between the two largest fixed parts; or, the obstruction detection plate is provided with at least three fixed parts evenly distributed around the periphery of the assembly hole, and the sensor is located at any position in the circumferential direction of the assembly hole. between two adjacent fixed parts.
  • the number of fixed parts is greater than two, the installation of the obstruction detection board is more secure.
  • the sensor should be placed between two adjacent fixing parts with the largest distance. Compared with other fixing parts, the sensor placed here will suffer less damage. The impact is minimal to ensure the response speed of the lifting column when encountering obstacles.
  • the fixed parts are evenly distributed in the circumferential direction of the assembly hole, the entire obstruction detection plate will receive uniform force when encountering obstruction, and the sensor can be placed between any two adjacent fixed parts.
  • the lifting column also includes a motor box for driving the screw rod
  • the resistance detection plate is a bearing plate provided on the motor box, and the fixing part fixes the resistance detection plate. in the stated On the motor box.
  • the bearing plate is used to assemble the bearing and improve the smoothness of the screw rod rotation. When encountering resistance, the force on the screw rod is transmitted to the bearing plate. Sensors can be arranged on the bearing plate to detect obstruction, and no additional force is needed on the screw rod. Set up to detect blocked boards.
  • the senor is a strain gauge or a piezoelectric element pasted on the resistance detection plate. Strain gauges or piezoelectric elements can convert pressure into electrical signals. When the detection plate deforms when encountering resistance, it will drive the sensor to deform, thereby generating pressure and electrical signals.
  • the sensor is mounted on the resistance detection board and is easy to disassemble and assemble without the need for tools and other connectors.
  • the invention also discloses an electric lifting mechanism.
  • the electric lifting mechanism adopts the lifting column with the obstruction detection function disclosed in the above technical solution.
  • the obstruction detection plate will deform.
  • the sensor can quickly detect the deformation stress generated on the resistance detection plate and make the electric lifting mechanism respond accordingly.
  • the electric lifting mechanism has better safety and reliability. When the sensor fails, the sensor can be replaced without disassembling the screw rod and the resistance detection board.
  • Figure 1 is a schematic structural diagram of a lifting column in an embodiment of the present invention
  • Figure 2 is a schematic diagram of the internal structure of the lifting column in the embodiment of the present invention.
  • Figure 3 is an enlarged schematic diagram of position A in Figure 2;
  • Figure 4 is a schematic diagram of the installation of the resistance detection board and the lower surface of the motor box in the embodiment of the present invention
  • Figure 5 is a schematic structural diagram of the motor box in the embodiment of the present invention.
  • Figure 6 is a schematic structural diagram of two fixing holes provided on the obstruction detection plate in the embodiment of the present invention.
  • Figure 7 is a schematic structural diagram of an obstruction detection board equipped with two sensors in an embodiment of the present invention.
  • Figure 8 is a schematic structural diagram of four unevenly distributed fixing holes on the obstruction detection plate in the embodiment of the present invention.
  • Figure 9 is a schematic structural diagram of four evenly distributed fixing holes provided on the obstruction detection plate in the embodiment of the present invention.
  • Screw 100 Screw 100; Motor box 200, box body 210, motor 220, boss 230, deformation gap 240; Obstacle detection plate 300, assembly hole 310, fixing hole 320, fastener 330; Sensor 400, metal plate 410, piezoelectric material 420, wire 430.
  • an embodiment of the present invention discloses a lifting column with an obstruction detection function, including a screw rod 100 and an obstruction detection plate 300 arranged on the screw rod 100.
  • the obstruction detection plate 300 is provided with an assembly hole. 310, the screw rod 100 passes through the assembly hole 310, and the resistance detection plate 300 is provided with a detection plate 300 for detecting resistance.
  • the deformation stress sensor 400 has a fixing part for fixing the obstruction detection plate 300 on both sides of the sensor 400.
  • the central angle formed by the connection between the two ends of the sensor 400 and the center of the assembly hole 310 is less than 360°.
  • the perpendicular line connecting the centers of the two fixed parts passes through the sensor 400 .
  • the dot-and-dashed line indicated by a in the figure is the center line connecting the fixed parts
  • the dot-dash line indicated by b is the perpendicular line of the center line.
  • the lifting column disclosed by the invention has a high resistance detection function and high safety performance and reliability.
  • the lifting column is installed on the equipment to drive the equipment or a certain part of the equipment to perform lifting movements (for example, it is installed on a lifting table to control the lifting of the table body or table board of the lifting table). If obstacles are encountered during the lifting movement When the object is moved, the screw rod 100 will transmit the axial force it receives to the obstruction detection plate 300, causing the obstruction detection plate 300 to deform due to force, triggering the sensor 400 to detect that the lifting column is in obstruction.
  • the fixed part is used to fix and install the obstruction detection plate 300.
  • the obstruction detection plate 300 near the fixed part has the greatest rigidity on the obstruction detection plate 300.
  • the area where the mid-perpendicular line connecting the centers of the two fixed parts is located is the area with the weakest comprehensive rigidity between the two fixed parts.
  • the sensor 400 is disposed here so that the sensor 400 can detect obstruction more quickly. , thereby improving the sensitivity of the lifting column obstruction detection function.
  • the sensor 400 When the sensor 400 is assembled on the resistance detection plate 300, it does not need to pass through the screw rod 100. It can be installed on the resistance detection plate 300 first and then assemble the screw rod 100, or the resistance detection plate 300 can be assembled on the screw rod first. 100, and then install sensor 400. In addition, when the sensor 400 fails, there is no need to disassemble the resistance detection plate 300 and the screw rod 100. The sensor 400 can be disassembled or replaced directly from the resistance detection plate 300, which is more convenient to use.
  • the distance between the sensor 400 and the assembly hole 310 is smaller than the distance between the sensor 400 and the edge of the obstruction detection plate 300 .
  • the fixing part is disposed close to the edge of the obstruction detection plate 300 .
  • the assembly hole 310 is disposed at the center of the obstruction detection plate 300 .
  • the sensor 400 is preferably a piezoelectric element, and the piezoelectric element can be directly It is pasted on the resistance detection board 300 and tightly connected with the resistance detection board 300 .
  • the installation method of the sensor 400 is simple, and existing sensing elements can be used, resulting in low cost and high assembly efficiency.
  • the piezoelectric element includes a metal plate 410 with a rubber strip on the back, a piezoelectric material 420 arranged on the metal plate 410, and a wire 430 connected to the piezoelectric material 420.
  • the wire 430 is used to transmit signal data of the piezoelectric element.
  • the piezoelectric element When the resistance detection plate 300 is deformed, the piezoelectric element will be deformed together, causing the piezoelectric material 420 to receive a force and generate a signal. This signal is the resistance signal.
  • other sensors 400 that can be triggered by pressure can also be selected, such as strain gauges.
  • the distance between the sensor 400 and other parts refers to the distance between the center of the piezoelectric material 420 and other parts; the angle between the sensor 400 and the assembly hole 310 refers to the line formed by connecting the two ends of the piezoelectric material 420 and the center of the assembly hole 310 angle.
  • the screw rod 100 When encountering an obstruction, the screw rod 100 transmits force to the obstruction detection plate 300, and the force transmits to the surroundings from the assembly hole 310 and decreases.
  • the edge of the obstruction detection plate 300 is far away from the assembly hole 310.
  • an obstruction occurs on the lifting column, When resistance occurs, it is difficult to generate large deformation stress in a short period of time. Placing the sensor 400 closer to the assembly hole 310 allows the sensor 400 to detect the deformation stress and generate a resistance signal at the early stage of resistance.
  • the position where the fixed part is provided on the obstruction detection plate 300 has enhanced rigidity and makes it difficult to deform and generate deformation stress when encountering obstruction.
  • the center of the obstruction detection plate 300 is the position with the weakest stiffness of the entire obstruction detection plate 300. At the same time, a large distance is maintained between the assembly hole 310 and the fixed part.
  • the assembly hole 310 is set at the center of the obstruction detection plate 300. position, so that the obstruction detection plate 300 around the assembly hole 310 is at the position where it deforms the most when encountering obstruction, thereby reducing the time required for the sensor 400 to detect obstruction.
  • the obstruction detection plate 300 is provided with two fixing parts, and the two fixing parts are symmetrical with respect to the center of the circle of the assembly hole 310 .
  • the distance between the two fixed parts and the assembly hole 310 is the same, and the assembly hole 310 is located at the midpoint of the central connection between the two fixed parts, so that the obstruction detection plate 300 around the assembly hole 310 is a stress concentration area to ensure that the sensor 400 encounters obstruction. Detection speed.
  • the distance between the sensor 400 and the mounting hole 310 is smaller than the distance between the sensor 400 and the fixing part, and the distance between the fixing part and the mounting hole 310 is the same.
  • the fixed part has the effect of strengthening the rigidity of the resistance detection plate 300.
  • the sensor 400 needs to be placed at a position where deformation stress is concentrated.
  • the fixed part is placed away from the sensor 400, which can reduce
  • the sensor 400 is affected by the fixed portion to increase the speed at which the sensor 400 detects obstruction.
  • the assembly hole 310 is located on the mid-perpendicular line connecting the center of the fixed part, that is, the assembly hole 310 is located on the area with the weakest stiffness on the obstruction detection plate 300, so as to improve the resistance of the obstruction detection plate 300 around the assembly hole 310 when the lifting column encounters obstruction in the early stage. A large amount of deformation can be generated to trigger the sensor 400 to generate a resistance signal.
  • the number of sensors 400 is only one. Since the position where the equipment for installing the lifting column encounters obstruction is not fixed, when obstruction occurs at different positions, the force direction transmitted by the screw rod 100 to the obstruction detection plate 300 is also different. Since the obstruction detection plate 300 near the assembly hole 310 There is a large amount of deformation when encountering resistance, and the sensor 400 is also arranged in the area around the assembly hole 310. At the same time, the fixing part can also concentrate the deformation stress at the installation position of the sensor 400, but no matter where the force direction is, the assembly The hole 310 area can produce deformation. The installation position of the sensor 400 is weak in rigidity, so that the deformation stress is transmitted to the sensor 400 at a low degree. The sensor 400 can detect the generation of deformation stress and respond quickly, so it only detects when encountering obstacles. Setting one sensor 400 on the board 300 can meet the usage requirements and reduce the cost and installation difficulty.
  • the perpendicular line connecting the centers of the two fixing parts passes through at least one of the sensors. 400.
  • the two sensors 400 can detect the stress in different areas on the resistance detection plate 300. By analyzing the signal data of the two sensors 400, the accuracy of resistance detection can be improved and false alarms can be reduced. When one of the two sensors 400 fails, the other sensor 400 can also be used alone to detect obstruction. At least one of the sensors 400 is arranged on the area where deformation stress is concentrated on the resistance detection plate 300 to ensure the response speed of the lifting column when it encounters resistance.
  • the two sensors 400 are arranged spaced apart from the mounting holes 310 . Since the direction of the force transmitted by the screw 100 to the resistance detection plate 300 is also different under different resistance conditions, when the force of the screw 100 is transmitted to one side of the assembly hole 310, the deformation amount on both sides of the assembly hole 310 will There is a difference. There will be a delay when the sensor 400 on the other side detects resistance. Sensors 400 are provided on both sides of the assembly hole 310, which increases the detection range of the sensor 400. In this way, the force of the screw rod 100 no matter the direction. In any direction, the sensor 400 can quickly detect obstacles in a short time.
  • the obstruction detection plate 300 is provided with at least three fixing parts.
  • the installation of the obstruction detection board 300 is more secure.
  • the sensor 400 is arranged between two adjacent fixed parts with the largest distance. Compared with other fixed parts, the sensor 400 is arranged here to be least affected, so as to ensure the response speed of the lifting column when encountering obstacles. If the fixing parts are evenly distributed in the circumferential direction of the assembly hole 310, the entire obstruction detection plate 300 will receive uniform force when encountering obstruction, and the sensor 400 can be disposed between any two adjacent fixing parts.
  • the length L of the center line connecting two adjacent fixing parts in the circumferential direction of the mounting hole 310 is the same, and the entire assembly will encounter obstruction.
  • the detection plate 300 is evenly stressed when encountering obstacles, and the sensor 400 can be disposed between any two adjacent fixed parts.
  • the lifting column also includes a motor box 200 for driving the screw rod 100.
  • the resistance detection plate 300 is a bearing plate provided on the motor box 200.
  • the fixed portion is The resistance detection board 300 is fixed on the motor box 200 .
  • the motor box 200 is used to control the lifting movement of the screw rod 100.
  • the motor box 200 is equipped with a gear member of the motor box 200, which can drive the screw rod 100 to rotate and control the rotation direction of the screw rod 100, so as to control the lifting and lowering of the screw rod 100.
  • the bearing plate is used to assemble the bearing and improve the smoothness of the rotation of the screw rod 100. When encountering resistance, the force on the screw rod 100 is transmitted to the bearing plate.
  • the sensor 400 is arranged on the bearing plate to detect obstruction. No additional settings are required for checking Test the board that encounters resistance.
  • the obstruction detection board 300 can also be provided on the lower surface of the motor box 200 .
  • the motor box 200 includes a box body 210 and a motor 220 arranged in the box body 210.
  • the box body 210 is provided with a boss 230.
  • the fastener 330 is fixedly connected to the boss 230.
  • the resistance detection plate 300 is connected to the bottom wall of the box body 210.
  • a deformation gap 240 is formed therebetween to avoid the obstruction detection plate 300 .
  • the deformation gap 240 can facilitate the deformation of the detection plate 300 without being blocked by the box body 210 .
  • the boss 230 is used to fixedly connect the obstruction detection plate 300 so that the middle part of the obstruction detection plate 300 will not contact the bottom wall of the box body 210. In this way, the stiffness of the middle part of the obstruction detection plate 300 will not be affected by the box body 210. Strengthen and affect the detection performance of the sensor 400.
  • the fixing part includes a fixing hole 320 provided on the obstruction detection plate 300 and a fastener 330 that penetrates the fixing hole 320 and is fixedly connected to the motor box 200.
  • the fastener 330 may be a screw.
  • the fixing part can also be a rivet, and the rivet directly fixes the resistance detection plate and the motor box through a rivet gun; the fixation part can also be a snap piece integrally formed on the resistance detection plate and can be buckled and connected with the motor box.
  • the invention also discloses an electric lifting mechanism, which includes a lifting platform and a lifting column with a resistance detection function disclosed in any of the above solutions.
  • the lifting column is used to control the lifting platform to perform lifting movements.
  • the invention also discloses an electric lifting mechanism.
  • the electric lifting mechanism adopts the lifting column with the obstruction detection function disclosed in the above technical solution.
  • the sensor can quickly detect the deformation stress generated on the resistance detection plate and make the electric lifting mechanism respond accordingly.
  • the electric lifting mechanism has better safety and reliability. When the sensor fails, the sensor can be replaced without disassembling the screw rod and the resistance detection board.
  • the electric lifting mechanism can be a lifting table, a lifting bed, etc.

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  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种具有遇阻检测功能的升降立柱及电动升降机构，其传感器拆装方便且能够在短时间内检测到遇阻，提高升降立柱的遇阻响应速度。该具有遇阻检测功能的升降立柱包括丝杆（100）和配置于丝杆（100）上的遇阻检测板（300），遇阻检测板（300）上设有装配孔（310），丝杆（100）贯穿装配孔（310），遇阻检测板（300）上设有用于检测遇阻检测板（300）形变应力的传感器（400），传感器（400）的两侧分别设有一个用于固定安装遇阻检测板（300）的固定部，传感器（400）的两端与装配孔（310）的圆心连线形成的圆心角小于360°，两个固定部的中心连线的中垂线经过传感器（400）。

Description

具有遇阻检测功能的升降立柱及电动升降机构 【技术领域】
本发明涉及线性致动器领域，尤其涉及具有遇阻检测功能的升降立柱及电动升降机构。
【背景技术】
电动升降机构例如升降桌、升降床，具有升降的功能。通常电动升降机构包括平台和驱动平台升降的升降立柱。若在平台升降过程中遇到了障碍物，则升降立柱继续带动平台升降时平台会与障碍物接触并产生相互作用力，作用力会通过平台传递至升降立柱上，若是升降立柱不立即停止，平台或是升降立柱会因为障碍物而损坏；若障碍物是人体，会导致人体受到伤害。
为此，现有的电动升降机构设置了能够检测遇阻的遇阻检测机构。目前遇阻检测机构中灵敏度较高的，采用可以实现压力信号及电信号之间转化的元件作为遇阻检测元件。然而当遇阻检测元件安装位置处的形变量较小时，产生的形变应力不足以使遇阻检测元件产生遇阻警报，只有当平台和障碍物之间在碰撞后的一段时间后，才能产生足够大的形变应力触发遇阻检测元件，电动升降机构的遇阻响应速度太慢。
【发明内容】
本发明所要解决的技术问题在于克服现有技术的不足而提出具有遇阻检测功能的升降立柱，传感器的拆装方便，且能够在出现遇阻的短时间内检测到遇阻，提高升降立柱的遇阻响应速度。
为解决上述技术问题，本发明采用如下技术方案：
具有遇阻检测功能的升降立柱，包括丝杆和配置于所述丝杆上的遇阻检测板，所述遇阻检测板上设有装配孔，所述丝杆贯穿所述装配孔，所述遇阻检测 板上设有用于检测遇阻检测板形变应力的传感器，所述传感器的两侧分别设有一个用于固定安装遇阻检测板的固定部，所述传感器的两端与所述装配孔的圆心连线形成的圆心角小于360°，两个固定部的中心连线的中垂线经过所述传感器。
在上述方案的基础上，所述传感器与所述装配孔的距离小于所述传感器与所述遇阻检测板边缘的距离。
在上述方案的基础上，所述固定部靠近所述遇阻检测板的边缘设置。
在上述方案的基础上，所述装配孔设置于所述遇阻检测板的中心位置。
在上述方案的基础上，所述传感器与所述装配孔的距离小于所述传感器与所述固定部的距离。
在上述方案的基础上，所述固定部与装配孔的距离相同。
在上述方案的基础上，所述传感器设有两个，两个固定部的中心连线的中垂线经过至少其中一个传感器。
在上述方案的基础上，两个传感器间隔所述装配孔设置。
在上述方案的基础上，所述遇阻检测板上设有两个固定部，两个固定部相对所述装配孔的圆心中心对称。
在上述方案的基础上，所述遇阻检测板上设有至少三个固定部，在所述装配孔的圆周方向上，相邻两个固定部的中心连线长度为L，所述传感器的至少部分位于L最大的两个固定部之间；或者，所述遇阻检测板上设有至少三个均匀分布在所述装配孔外周的固定部，在所述装配孔的圆周方向上，所述传感器位于任意两个相邻的固定部之间。
在上述方案的基础上，所述升降立柱还包括用于驱动所述丝杆的电机盒，所述遇阻检测板为设于所述电机盒上的轴承板，所述固定部将所述遇阻检测板 固定在所述电机盒上。
在上述方案的基础上，所述固定部为与所述电机盒扣合的卡扣件；或者，所述固定部包括设置于所述遇阻检测板上的固定孔和贯穿所述固定孔与所述电机盒固定连接的紧固件。
在上述方案的基础上，所述传感器为粘贴在所述遇阻检测板上的应变片或压电元件。
电动升降机构，包括升降平台和上述任意方案中公开的所述具有遇阻检测功能的升降立柱，所述升降立柱用于控制所述升降平台做升降运动。
本发明的有益效果：
本发明公开了一种具有遇阻检测功能的升降立柱，其遇阻检测功能灵敏度高，具有较高的安全性能和可靠性。升降立柱安装在设备上用于驱动设备或设备上的某个部分做升降运动(例如设置在升降桌上，用于控制升降桌的桌体或者桌板升降)，在升降运动过程中遇到障碍物时，丝杆将受到的轴向作用力传递至遇阻检测板上，使遇阻检测板受力发生形变，触发传感器而测得升降立柱遇阻。
固定部用于固定安装遇阻检测板，固定部附近的遇阻检测板在固定连接的作用下，刚性属于遇阻检测板上最大的位置，离固定部越远，则刚性越弱，而两个固定部中心连线的中垂线所在的区域是位于两个固定部中间综合刚性最弱的区域，将传感器设置于此处，使传感器能够更快地检测到遇阻情况，从而提高了升降立柱遇阻检测功能的灵敏度。
传感器装配到遇阻检测板上时，不需要穿过丝杆，可以先安装在遇阻检测板上后再装配丝杆，或者是先将遇阻检测板装配在丝杆上，再安装传感器。此外，当传感器出现故障时，不需要将遇阻检测板与丝杆进行拆分，便可以从遇阻检测板上直接将传感器拆卸或更替，使用更加方便。
进一步的，所述传感器与所述装配孔的距离小于所述传感器与所述遇阻检测板边缘的距离。需要说明的是，传感器的通常由具有检测功能的电子元件以及承载电子元件的外壳或支架组成，传感器与固定部的距离，实际是指传感器内的电子元件的中心与固定部的中心的距离。遇阻时，丝杆向遇阻检测板传递作用力，作用力自装配孔向四周传递并递减，遇阻检测板的边缘与装配孔的距离较远，在升降立柱出现遇阻时，难以在短时间内产生大的形变应力，将传感器更加靠近装配孔设置，可以使传感器在遇阻阶段的初期便可以检测到形变应力而产生遇阻信号。
进一步的，所述固定部靠近所述遇阻检测板的边缘设置。遇阻检测板上设置固定部的位置，刚度得到了强化而难以在遇阻时出现形变产生形变应力，固定部与装配孔的距离越远，对装配孔周围的遇阻检测板的形变影响越小，以保证升降立柱的遇阻响应速度。
进一步的，所述装配孔设置于所述遇阻检测板的中心位置。遇阻检测板的中心是整块遇阻检测板刚度最弱的位置，同时装配孔与固定部之间也保持较大的间距，将装配孔设置在遇阻检测板的中心位置，使装配孔周围的遇阻检测板为遇阻时形变最大的位置，减少传感器检测到遇阻所需的时间。
进一步的，所述传感器与所述装配孔的距离小于所述传感器与所述固定部的距离。固定部对遇阻检测板具有强化刚度的作用，为了能使传感器在短时间内检测到遇阻，需要将传感器设置在形变应力集中的位置，将固定部远离传感器设置，可以减少传感器受到的固定部的影响，以提高传感器检测遇阻的速度。
进一步的，所述固定部与装配孔的距离相同。装配孔位于固定部中心连线的中垂线上，即装配孔位于遇阻检测板上刚度最弱的区域，以提高升降立柱遇阻初期时装配孔周围的遇阻检测板可以产生较大的形变量触发传感器产生遇阻信号。
进一步的，所述传感器设有两个，两个固定部的中心连线的中垂线经过至少其中一个传感器。两个传感器可以检测遇阻检测板上不同区域的应力，通过 对两个传感器的信号数据进行分析，可以提高遇阻检测的准确度，降低误报的情况。当两个传感器的其中一个出现故障时，另一个传感器也可以单独用于进行遇阻检测。其中至少一个传感器设置在遇阻检测板上形变应力集中的区域，以保证升降立柱的遇阻响应速度。
进一步的，两个传感器间隔所述装配孔设置。由于安装升降立柱的设备出现遇阻的位置不固定，因此不同的位置遇阻时，丝杆向遇阻检测板传递的作用力方向也不同，当丝杆的作用力向装配孔的其中一侧传递时，装配孔两侧的形变量存在差别，另一侧的传感器检测到遇阻时会有延迟，而在装配孔的两侧均设置传感器，提高了传感器的检测范围，这样一来丝杆的作用力不论朝向哪个方向，传感器都可以在短时间内快速检测到遇阻。
进一步的，所述遇阻检测板上设有两个固定部，两个固定部相对所述装配孔的圆心中心对称。两个固定部与装配孔的间距相同，同时装配孔位于两个固定部中心连接的中点位置，使得装配孔周围的遇阻检测板为应力集中区域，以保证传感器遇阻检测速度。
进一步的，所述遇阻检测板上设有至少三个固定部，在所述装配孔的圆周方向上，相邻两个固定部的中心连线长度为L，所述传感器的至少部分位于L最大的两个固定部之间；或者，所述遇阻检测板上设有至少三个均匀分布在所述装配孔外周的固定部，在所述装配孔的圆周方向上，所述传感器位于任意两个相邻的固定部之间。固定部的数量大于两个时，遇阻检测板的安装更加牢固。若多个固定部在装配孔的圆周方向上呈不规则分布，则将传感器设置在间距最大的相邻两个固定部之间，相较于其他的固定部，将传感器设置在此处受到的影响最小，以保证升降立柱的遇阻响应速度。若固定部在装配孔的圆周方向上呈均匀分布，则整个遇阻检测板在遇阻时受力均匀，传感器设置在任意相邻的两个固定部之间均可。
进一步的，所述升降立柱还包括用于驱动所述丝杆的电机盒，所述遇阻检测板为设于所述电机盒上的轴承板，所述固定部将所述遇阻检测板固定在所述 电机盒上。轴承板用于装配轴承，提升丝杆转动的顺畅度，遇阻时丝杆上的作用力传递至轴承板上，在轴承板上布置传感器便可以进行遇阻检测，丝杆上也不需要额外设置用于检测遇阻的板体。
进一步的，所述传感器为粘贴在所述遇阻检测板上的应变片或压电元件。应变片或压电元件能够将压力转化为电信号，遇阻检测板形变时会带动传感器形变，从而产生压力和电信号。传感器贴装在遇阻检测板上，拆装方便，不需要使用工具和其他的连接件。
本发明还公开了电动升降机构，电动升降机构采用了上述技术方案中公开的具有遇阻检测功能的升降立柱，升降平台升降过程中遇到物体或者夹到用户时，遇阻检测板出现形变，传感器可以快速检测到遇阻检测板上产生的形变应力而使电动升降机构做出相应的遇阻反应，电动升降机构具有更好的安全性和可靠性。当传感器出现故障时，不需要将丝杆和遇阻检测板拆分便可以更替传感器。
本发明的这些特点和优点将会在下面的具体实施方式、附图中详细的揭露。
【附图说明】
下面结合附图对本发明做进一步的说明：
图1为本发明实施例中升降立柱的结构示意图；
图2为本发明实施例中升降立柱的内部结构示意图；
图3为图2中A处的放大示意图；
图4为本发明实施例中遇阻检测板与电机盒下表面的安装示意图；
图5为本发明实施例中电机盒的结构示意图；
图6为本发明实施例中遇阻检测板上设有两个固定孔的结构示意图；
图7为本发明实施例中设有两个传感器的遇阻检测板的结构示意图；
图8为本发明实施例中遇阻检测板上设有四个不均匀分布固定孔的结构示意图；
图9为本发明实施例中遇阻检测板上设有四个均匀分布固定孔的结构示意图。
附图标记：
丝杆100；
电机盒200、盒体210、电机220、凸台230、形变间隙240；
遇阻检测板300、装配孔310、固定孔320、紧固件330；
传感器400、金属板410、压电材料420、导线430。
【具体实施方式】
下面结合本发明实施例的附图对本发明实施例的技术方案进行解释和说明，但下述实施例仅为本发明的优选实施例，并非全部。基于实施方式中的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得其他实施例，都属于本发明的保护范围。
下文中出现的诸如“示例性”“一些实施例”等词意为“用作例子、实施例或说明性”，作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。为了更好的说明本发明，在下文的具体实施方式中给出了众多的具体细节，本领域技术人员应当理解，没有某些具体细节，本公开同样可以实施。
参照图1至图6，本发明实施例公开了具有遇阻检测功能的升降立柱，包括丝杆100和配置于丝杆100上的遇阻检测板300，遇阻检测板300上设有装配孔310，丝杆100贯穿装配孔310，遇阻检测板300上设有用于检测遇阻检测板300 形变应力的传感器400，传感器400的两侧分别设有一个用于固定安装遇阻检测板300的固定部，传感器400的两端与装配孔310的圆心连线形成的圆心角小于360°，两个固定部的中心连线的中垂线经过传感器400。如图6所示，图中a所指的点划线为固定部的中心连线，b所指的点划线为中心连线的中垂线。
本发明公开的升降立柱，遇阻检测功能灵敏度高，具有较高的安全性能和可靠性。升降立柱安装在设备上用于驱动设备或设备上的某个部分做升降运动(例如设置在升降桌上，用于控制升降桌的桌体或者桌板升降)，在升降运动过程中遇到障碍物时，丝杆100将受到的轴向作用力传递至遇阻检测板300上，使遇阻检测板300受力发生形变，触发传感器400而测得升降立柱遇阻。
固定部用于固定安装遇阻检测板300，固定部附近的遇阻检测板300在固定连接的作用下，刚性属于遇阻检测板300上最大的位置，离固定部越远，则刚性越弱，而两个固定部中心连线的中垂线所在的区域是位于两个固定部中间综合刚性最弱的区域，将传感器400设置于此处，使传感器400能够更快地检测到遇阻情况，从而提高了升降立柱遇阻检测功能的灵敏度。
传感器400装配到遇阻检测板300上时，不需要穿过丝杆100，可以先安装在遇阻检测板300上后再装配丝杆100，或者是先将遇阻检测板300装配在丝杆100上，再安装传感器400。此外，当传感器400出现故障时，不需要将遇阻检测板300与丝杆100进行拆分，便可以从遇阻检测板300上直接将传感器400拆卸或更替，使用更加方便。
为了提高传感器400的灵敏度，传感器400需要靠近装配孔310设置，为此本申请做了以下限定：
传感器400与装配孔310的距离小于传感器400与遇阻检测板300边缘的距离，固定部靠近遇阻检测板300的边缘设置，装配孔310设置于遇阻检测板300的中心位置。
其中，传感器400优选为压电元件，压电元件通过背部带胶的形式可直接 粘贴在遇阻检测板300上，与遇阻检测板300紧固连接。传感器400的安装方式简单，且可以采用现有的传感元件，成本低且装配效率高。压电元件包括背部附带胶条的金属板410、设置在金属板410上的压电材料420、连接压电材料420的导线430，导线430用于传递压电元件的信号数据。当遇阻检测板300出现形变时会带动压电元件一同发生形变，使压电材料420受到作用力而产生信号，此信号即为遇阻信号。此外也可以选择其他可以被压力触发的传感器400，例如应变片。传感器400与其他部位的间距，是指压电材料420的中心与其他部位的间距；传感器400与装配孔310的角度，是指压电材料420的两端与装配孔310的圆心连线所形成的夹角。
遇阻时，丝杆100向遇阻检测板300传递作用力，作用力自装配孔310向四周传递并递减，遇阻检测板300的边缘与装配孔310的距离较远，在升降立柱出现遇阻时，难以在短时间内产生大的形变应力，将传感器400更加靠近装配孔310设置，可以使传感器400在遇阻阶段的初期便可以检测到形变应力而产生遇阻信号。
遇阻检测板300上设置固定部的位置，刚度得到了强化而难以在遇阻时出现形变产生形变应力，固定部与装配孔310的距离越远，对装配孔310周围的遇阻检测板300的形变影响越小，以保证升降立柱的遇阻响应速度。
遇阻检测板300的中心是整块遇阻检测板300刚度最弱的位置，同时装配孔310与固定部之间也保持较大的间距，将装配孔310设置在遇阻检测板300的中心位置，使装配孔310周围的遇阻检测板300为遇阻时形变最大的位置，减少传感器400检测到遇阻所需的时间。
遇阻检测板300上设有两个固定部，两个固定部相对装配孔310的圆心中心对称。两个固定部与装配孔310的间距相同，同时装配孔310位于两个固定部中心连接的中点位置，使得装配孔310周围的遇阻检测板300为应力集中区域，以保证传感器400遇阻检测速度。
参照图6至图9，在本发明的一个实施例中，基于上述实施例，提出了进一 步提高传感器400灵敏度的方案。
传感器400与装配孔310的距离小于传感器400与固定部的距离，固定部与装配孔310的距离相同。
固定部对遇阻检测板300具有强化刚度的作用，为了能使传感器400在短时间内检测到遇阻，需要将传感器400设置在形变应力集中的位置，将固定部远离传感器400设置，可以减少传感器400受到的固定部的影响，以提高传感器400检测遇阻的速度。
装配孔310位于固定部中心连线的中垂线上，即装配孔310位于遇阻检测板300上刚度最弱的区域，以提高升降立柱遇阻初期时装配孔310周围的遇阻检测板300可以产生较大的形变量触发传感器400产生遇阻信号。
参照图6、图8和图9，在本发明的一个实施例中，传感器400的数量仅为一个。由于安装升降立柱的设备出现遇阻的位置不固定，因此不同的位置遇阻时，丝杆100向遇阻检测板300传递的作用力方向也不同，由于装配孔310附近的遇阻检测板300在遇阻时具有较大的形变量，而传感器400也设置在装配孔310周围的区域，同时固定部也能够将形变应力集中在传感器400的设置位置，但不论作用力方向朝向何处，装配孔310区域均能够产生形变，传感器400安装位置刚性弱而使得形变应力传递至传感器400上时衰减程度较轻，传感器400能够检测到形变应力的产生而做出快速响应，因此只在遇阻检测板300上设置一个传感器400便能够满足使用需求，可以降低成本和安装难度。
参照图7，在本发明的一个实施例中，与上述实施例不同的是，本实施例中，传感器400设有两个，两个固定部的中心连线的中垂线经过至少其中一个传感器400。两个传感器400可以检测遇阻检测板300上不同区域的应力，通过对两个传感器400的信号数据进行分析，可以提高遇阻检测的准确度，降低误报的情况。当两个传感器400的其中一个出现故障时，另一个传感器400也可以单独用于进行遇阻检测。其中至少一个传感器400设置在遇阻检测板300上形变应力集中的区域，以保证升降立柱的遇阻响应速度。
两个传感器400间隔装配孔310设置。由于不同遇阻条件下，丝杆100向遇阻检测板300传递的作用力方向也不同，当丝杆100的作用力向装配孔310的其中一侧传递时，装配孔310两侧的形变量存在差别，另一侧的传感器400检测到遇阻时会有延迟，而在装配孔310的两侧均设置传感器400，提高了传感器400的检测范围，这样一来丝杆100的作用力不论朝向哪个方向，传感器400都可以在短时间内快速检测到遇阻。
参照图8和图9，在本发明的一个实施例中，与上述实施例不同的是，本实施例中，遇阻检测板300上设有至少三个固定部。
固定部的数量大于两个时，遇阻检测板300的安装更加牢固。
如图8所示，若多个固定部在装配孔310的圆周方向上呈不规则分布，则将装配孔310的圆周方向上相邻两个固定部的中心连线长度记录为L，将传感器400设置在间距最大的相邻两个固定部之间，相较于其他的固定部的，将传感器400设置在此处受到的影响最小，以保证升降立柱的遇阻响应速度。若固定部在装配孔310的圆周方向上呈均匀分布，则整个遇阻检测板300在遇阻时受力均匀，传感器400设置在任意相邻的两个固定部之间均可。
如图9所示，若多个固定部在装配孔310的圆周方向上呈规则分布，则装配孔310的圆周方向上相邻两个固定部的中心连线长度L均相同，则整个遇阻检测板300在遇阻时受力均匀，传感器400设置在任意相邻的两个固定部之间均可。
参照图2至图4，在本发明的一个实施例中，升降立柱还包括用于驱动丝杆100的电机盒200，遇阻检测板300为设于电机盒200上的轴承板，固定部将遇阻检测板300固定在电机盒200上。电机盒200用于控制丝杆100的升降运动，电机盒200内设置电机盒200齿轮件，能够驱动丝杆100转动并控制丝杆100的转动方向，以实现控制丝杆100的上升下降。轴承板用于装配轴承，提升丝杆100转动的顺畅度，遇阻时丝杆100上的作用力传递至轴承板上，在轴承板上布置传感器400便可以进行遇阻检测，丝杆100上也不需要额外设置用于检 测遇阻的板体。
此外，遇阻检测板300还可以设置在电机盒200下表面。
电机盒200包括盒体210、设置于盒体210内的电机220，盒体210内设有凸台230，紧固件330与凸台230固定连接，遇阻检测板300与盒体210底壁之间形成避让遇阻检测板300的形变间隙240。形变间隙240可以方便遇阻检测板300产生形变而不会受到盒体210的阻挡。凸台230用于固定连接遇阻检测板300，使遇阻检测板300中间部分不会与盒体210底壁接触，这样一来遇阻检测板300的中间部分的刚度不会被盒体210强化而影响传感器400的检测性能。
固定部包括设置于遇阻检测板300上的固定孔320和贯穿固定孔320与电机盒200固定连接的紧固件330，紧固件330可以是螺钉。固定部也可以是铆钉，铆钉通过铆钉枪直接将遇阻检测板与电机盒进行固定；固定部也可以是一体成型在遇阻检测板上能与电机盒扣合连接的卡扣件。
本发明还公开了电动升降机构，包括升降平台和上述任意方案中公开的具有遇阻检测功能的升降立柱，升降立柱用于控制升降平台做升降运动。本发明还公开了电动升降机构，电动升降机构采用了上述技术方案中公开的具有遇阻检测功能的升降立柱，升降平台升降过程中遇到物体或者夹到用户时，遇阻检测板出现形变，传感器可以快速检测到遇阻检测板上产生的形变应力而使电动升降机构做出相应的遇阻反应，电动升降机构具有更好的安全性和可靠性。当传感器出现故障时，不需要将丝杆和遇阻检测板拆分便可以更替传感器。
电动升降机构可以是升降桌、升降床等。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，熟悉该本领域的技术人员应该明白本发明包括但不限于附图和上面具体实施方式中描述的内容。任何不偏离本发明的功能和结构原理的修改都将包括在权利要求书的范围中。

Claims (14)

  1. 具有遇阻检测功能的升降立柱，包括丝杆和配置于所述丝杆上的遇阻检测板，所述遇阻检测板上设有装配孔，所述丝杆贯穿所述装配孔，其特征在于，所述遇阻检测板上设有用于检测遇阻检测板形变应力的传感器，所述传感器的两侧分别设有一个用于固定安装遇阻检测板的固定部，所述传感器的两端与所述装配孔的圆心连线形成的圆心角小于360°，两个固定部的中心连线的中垂线经过所述传感器。
  2. 根据权利要求1所述的具有遇阻检测功能的升降立柱，其特征在于，所述传感器与所述装配孔的距离小于所述传感器与所述遇阻检测板边缘的距离。
  3. 根据权利要求1所述的具有遇阻检测功能的升降立柱，其特征在于，所述固定部靠近所述遇阻检测板的边缘设置。
  4. 根据权利要求3所述的具有遇阻检测功能的升降立柱，其特征在于，所述装配孔设置于所述遇阻检测板的中心位置。
  5. 根据权利要求1所述的具有遇阻检测功能的升降立柱，其特征在于，所述传感器与所述装配孔的距离小于所述传感器与所述固定部的距离。
  6. 根据权利要求1所述的具有遇阻检测功能的升降立柱，其特征在于，所述固定部与装配孔的距离相同。
  7. 根据权利要求1至6中任一项所述的具有遇阻检测功能的升降立柱，其特征在于，所述传感器设有两个，两个固定部的中心连线的中垂线经过至少其中一个传感器。
  8. 根据权利要求7所述的具有遇阻检测功能的升降立柱，其特征在于，两个传感器间隔所述装配孔设置。
  9. 根据权利要求1至6中任一项所述的具有遇阻检测功能的升降立柱，其特征在于，所述遇阻检测板上设有两个固定部，两个固定部相对所述装配孔的圆心 中心对称。
  10. 根据权利要求1至6中任一项所述的具有遇阻检测功能的升降立柱，其特征在于，所述遇阻检测板上设有至少三个固定部，在所述装配孔的圆周方向上，相邻两个固定部的中心连线长度为L，所述传感器的至少部分位于L最大的两个固定部之间；
    或者，所述遇阻检测板上设有至少三个均匀分布在所述装配孔外周的固定部，在所述装配孔的圆周方向上，所述传感器位于任意两个相邻的固定部之间。
  11. 根据权利要求1至6中任一项所述的具有遇阻检测功能的升降立柱，其特征在于，所述升降立柱还包括用于驱动所述丝杆的电机盒，所述遇阻检测板为设于所述电机盒上的轴承板，所述固定部将所述遇阻检测板固定在所述电机盒上。
  12. 根据权利要求11所述的具有遇阻检测功能的升降立柱，其特征在于，所述固定部为与所述电机盒扣合的卡扣件；或者，所述固定部包括设置于所述遇阻检测板上的固定孔和贯穿所述固定孔与所述电机盒固定连接的紧固件。
  13. 根据权利要求1至6中任一项所述的具有遇阻检测功能的升降立柱，其特征在于，所述传感器为粘贴在所述遇阻检测板上的应变片或压电元件。
  14. 电动升降机构，其特征在于，包括升降平台和权利要求1至13中任一项所述具有遇阻检测功能的升降立柱，所述升降立柱用于控制所述升降平台做升降运动。
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