CN221242011U

CN221242011U - Height measurement and control device of electric lifting table

Info

Publication number: CN221242011U
Application number: CN202323114777.4U
Authority: CN
Inventors: 李志�
Original assignee: Shenzhen Congchang Technology Co ltd
Current assignee: Shenzhen Congchang Technology Co ltd
Filing date: 2023-11-19
Publication date: 2024-07-02
Anticipated expiration: 2033-11-19

Abstract

The utility model provides a height measurement and control device of an electric lifting table aiming at a lifting table with an X-shaped bracket or a plane four-bar mechanism as a lifting mechanism. The angle sensing device comprises an angle sensor, a first connecting piece and a second connecting piece. The first connecting piece and the second connecting piece are crossed and respectively fixedly connected to the base and the rotation center of the angle sensor. The extending ends of the first connecting piece and the second connecting piece are respectively connected to two different structural members which can move relatively of the lifting table. The control driving module is electrically connected with the angle sensor, the hand controller and the motor, acquires and identifies the rotation angle value of the angle sensor, and calculates the lifting height of the lifting table; and receiving a lifting command of the hand controller, controlling the driving motor to rotate, and controlling the lifting table to lift. The lifting table height measurement and control device has the advantages of less use and installation of sensors and low manufacturing cost.

Description

Height measurement and control device of electric lifting table

Technical Field

The utility model relates to a height detection and control device of a lifting table, and belongs to the technical field of tables.

Background

The electric lifting table generally uses a position sensor to detect the height of the lifting table, and the lifting table is controlled to lift by a hand controller. For identifying the height of the lifting table, a single motor-driven lifting table system, such as CN213370553U, is provided with travel switches for identifying the lowest and highest positions of the lifting table at two ends of the lifting travel, and a hall sensor for detecting the number of rotations of the motor is provided on the motor. The lifting table height of the current position is further calculated by identifying the position of the travel switch and the number of rotations of the motor at the position opposite to the current position. The sensor needs to be used and installed with a plurality of sensors, and the problems of using and installing a plurality of sensors and further improving the manufacturing cost are solved.

Disclosure of utility model

In order to solve the problems of the lifting table, the utility model provides a height measurement and control device for an electric lifting table, which can detect and control the lifting height of the lifting table, and has the advantages of fewer sensors used and installed and low manufacturing cost.

The technical scheme adopted by the utility model for solving the technical problems is as follows.

The lifting table comprises a base bracket, a power device, a lifting mechanism and a table top. The lifting mechanism of the lifting table can be an X-shaped bracket, and the power device drives and changes the intersection included angle of two intersecting arms of the X-shaped bracket, so that the lifting table can be lifted. The lifting mechanism of the lifting table can also be a plane four-bar mechanism, and the power device enables the quadrangle of the plane four-bar mechanism to deform, thereby driving the table top to lift.

The angle sensing device comprises an angle sensor, a first connecting piece and a second connecting piece. The angle sensor may be a resistive angle sensor, a capacitive angle sensor, a photo-electric angle sensor, or an inductive angle sensor. The first connecting piece and the second connecting piece are arranged in a crossing mode, and are fixedly connected to the base and the rotation center of the angle sensor respectively at the crossing positions. The included angle between the first connecting piece and the second connecting piece is changed, so that the rotation center of the angle sensor is driven to rotate relative to the base of the angle sensor, and the internal state (output resistance value, output capacitance value and the like) of the angle sensor is changed. For example, the angle sensor is a resistive angle sensor, the output resistance of the angle sensor is changed after the rotation angle of the angle sensor is changed, and the rotation angle value of the angle sensor can be calculated according to the output resistance.

The extending ends of the first connecting piece and the second connecting piece are respectively connected to two different structural members which can move relatively of the lifting table, and the connecting mode can be fixed connection, rotational connection or sliding connection. The two structural members relatively move while the lifting table is lifted.

For a lifting table using an X-shaped bracket, the extending ends of the first connecting piece and the second connecting piece can be respectively connected to two cross arms of the X-shaped bracket, or a table top and one of the cross arms, or a power device, the table top and the like.

For the lifting table using the planar four-bar mechanism, the extending ends of the first connecting piece and the second connecting piece can be respectively connected to any two adjacent connecting rods of the planar four-bar mechanism, or one movable connecting rod of the tabletop and the planar four-bar mechanism, or one movable connecting rod of the power device and the planar four-bar mechanism, and the like.

When the power device drives the tabletop to lift, the two components connected with the first connecting piece and the second connecting piece move relatively, the first connecting piece and the second connecting piece are driven to rotate relatively, the crossed included angle of the first connecting piece and the second connecting piece is changed, the rotation center of the angle sensor is enabled to rotate relative to the base of the angle sensor, and then the internal state of the angle sensor is changed.

The control driving module is electrically connected with the angle sensor, the hand controller and the motor. The power module provides power for the control driving module, the angle sensor, the hand controller and the motor. The control driving module receives a lifting command signal of the hand controller, drives the motor to rotate, and further controls the lifting of the table.

The control driving module collects angle information of the angle sensor, and then can calculate the crossed included angle of the first connecting piece and the second connecting piece, and the height value of the lifting table can be calculated because the included angle has one-to-one correspondence with the height value of the lifting table. In addition, the limit length of the power device which can act corresponds to the limit height of the lifting table, and the limit length corresponds to the maximum and minimum value of the crossing included angles of the first connecting piece and the second connecting piece. Therefore, only one angle sensor is needed, the control driving module can identify the maximum and minimum heights of the lifting table, and identify the movable limit position of the power device, and an additional limit position detection sensor is not needed to be installed. Because the sensors are used and installed in a small number, the manufacturing cost is reduced.

The hand controller comprises a key unit which can trigger to generate a lifting command and control the lifting table to lift. The hand controller may further include a display unit for displaying current height information of the elevating table.

Drawings

Fig. 1 is a perspective view of an electric lifting table according to embodiment 1.

Fig. 2 is a schematic circuit structure diagram of a height measurement and control device of the electric lifting table.

Fig. 3 is a perspective view of the electric lifting table according to embodiment 2.

Fig. 4 is a perspective view of the electric lifting table according to embodiment 3.

Reference numerals illustrate: 1. a base bracket; 2. an X-shaped bracket; 21. a first cross arm; 22. a second cross arm; 3. a link mechanism; 31. an upper link member; 32. a lower link member; 33. lifting the connecting rod piece; 4. a tabletop; 5. a power device 51, a motor 52 and a speed reducing mechanism; 53. a winding member; 54. a flexible cable; 55. a pulley; 56. a telescopic push rod; 6. an angle sensor; 61. an angle sensor; 62. a first connector; 63. a second connector; 7. controlling a driving module; 8. a hand controller; 81. a key unit; 82. a display unit; 9. and a power supply module.

Detailed Description

Embodiment 1 of the present utility model will be described with reference to fig. 1.

As shown in fig. 1, the lifting mechanism of the lifting table of the present embodiment is an X-shaped bracket. An X-shaped bracket 2 is arranged between the base bracket 1 and the tabletop 4, and the X-shaped bracket 2 comprises a first cross arm 21 and a second cross arm 22 which are rotatably connected in the middle. The lower end of the first cross arm 21 is rotationally connected with the base bracket 1, and the upper end is in sliding connection with the tabletop 4; the upper end of the second cross arm 22 is rotatably connected with the table top 4, and the lower end is slidably connected with the base bracket 1.

The power device 5 is arranged on the base bracket 1, and a motor 51, a speed reducing mechanism 52 and a winding piece 53 are sequentially connected in a transmission way. The free end of the flexible cable 54 is wound on the winding member 53, the middle of the flexible cable bypasses the pulley 55, and the fixed end is connected with the base bracket 1. A pulley 55 is mounted at the lower end of the second cross arm 22. When the motor 51 rotates, the winding piece 53 is driven to rotate, so that the flexible rope 54 is tightened or released, the traction pulley 55 translates, and the intersection angle of the X-shaped support 2 of the lifting table is changed, so that the lifting table is lifted.

The angle sensor device 6 includes an angle sensor 61, a first connector 62, and a second connector 63. One end of the first connecting piece 62 is fixedly connected with the base of the angle sensor 61, and the other end is rotatably connected with the first cross arm 21. One end of the second link 63 is fixedly connected to the rotation center of the angle sensor 61, and the other end is rotatably connected to the second cross arm 22. The angle sensor 61 is a resistive angle sensor, and the rotation center of the angle sensor has a correspondence with the output resistance value with respect to the rotation angle of the base, and the rotation angle can be calculated from the output resistance value.

When the crossing angle of the X-shaped bracket is changed, the crossing angles of the first connecting piece 62 and the second connecting piece 63 are driven to change, so that the output resistance of the angle sensor 61 is changed.

As shown in fig. 2, the control drive module 7 is electrically connected to the angle sensor 61, the hand controller 8, and the motor 51. The power module 9 supplies power to the control driving module 7, the angle sensor 61, the hand controller 8, and the motor 51.

The hand controller 8 includes a key unit 81 and a display unit 82. The control driving module 7 receives the key command signal of the key unit 81, drives and controls the motor 51 to rotate forward or backward, and further realizes lifting of the lifting table. The control driving module 7 collects the angle information of the angle sensor 61, estimates the height value of the elevating table according to the angle, and displays the height information of the elevating table on the display unit 82.

Embodiment 2 of the present utility model will be described with reference to fig. 3.

The lifting table of the embodiment is a lifting table with an X-shaped bracket as a lifting mechanism. As shown in fig. 3, the power device 5 is an electric push rod, and includes a motor 51 and a telescopic push rod 56. The power unit 5 is connected at both ends to one side of the base frame 1 and the lower end of the second cross arm 22, respectively. After the power device 5 stretches and contracts, the crossing included angle between the first crossing arm 21 and the second crossing arm 22 is changed, so that the tabletop 4 is lifted and lowered.

The structure and principle of the angle sensor 6 are similar to those of the first embodiment, and will not be described again. The first connector 62 is fixedly mounted to the base bracket 1. The second connecting piece 63 is provided with a hollow chute, the second cross arm 22 is provided with a protruding cylinder, and the protruding cylinder passes through the hollow chute of the above-mentioned second connecting piece 63.

When the lifting table is lifted, the protruding cylinder of the second cross arm 22 slides relative to the hollow chute of the second connecting piece 63, so that the cross included angle between the first connecting piece 62 and the second connecting piece 63 is changed, and the output resistance of the angle sensor 61 is further changed. The control driving module 7 collects and recognizes the angle of the angle sensor 61 and calculates and controls the elevating height of the elevating table. The other structural members and the circuit structure of the measurement control device in this embodiment are similar to those in the first embodiment, and will not be described again.

Embodiment 3 of the present utility model will be described with reference to fig. 4.

As shown in fig. 4, the lifting mechanism of the lifting table of the present embodiment is a planar four-bar mechanism, and the link mechanism 3 includes an upper link member 31, a lifting link member 33, and a lower link member 32, which are rotatably connected in order. The ends of the upper and lower link members 31, 32 are rotatably connected to the base bracket 1. The upper link member 31, the lower link member 32, the elevating link member 33 constitute a planar four-bar mechanism together with the base bracket 1, and the quadrilateral formed is a parallelogram. The table top 4 is mounted on the upper end of the elevating link 33. The power device 5 is an electric push rod, and two ends of the power device are respectively connected with the base bracket 1 and the upper connecting rod piece 31 in a rotating way. The telescopic push rod 56 of the power device 5 drives the upper connecting rod piece 31 to rotate, and the lifting connecting rod piece 33 is lifted, so that the table top 4 is lifted.

The structure and principle of the angle sensor 6 are similar to those of the first embodiment, and will not be described again. The first connecting member 62 is rotatably coupled to the underside of the table top 4 and the second connecting member 63 is rotatably coupled to the upper link member 31. When the lifting table is lifted, the table top 4 is close to or far away from the upper connecting rod piece 31, so that the intersection angle between the first connecting piece 62 and the second connecting piece 63 is changed, and the output resistance of the angle sensor 61 is changed. The control driving module 7 collects and recognizes the angle of the angle sensor 61 and calculates and controls the elevating height of the elevating table. The circuit configuration of the measurement control device of the present embodiment is similar to that of the first embodiment, and will not be described again.

The above is merely a preferred example of the present utility model, and the present utility model is not limited to the above embodiment. It will be apparent to those skilled in the art that the embodiments of certain components may be varied, for example, a first connector, a second connector fixedly connected to two intersecting arms of the X-bracket, respectively, with the X-bracket and the angle sensor axes of rotation coincident; the first connecting piece and the second connecting piece are respectively connected with the lower connecting rod piece, the lifting connecting rod piece and the like in a rotating way. Any modification, equivalent replacement, improvement, etc. made within the gist and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a height measurement and control device of an electric lifting table, which comprises a base bracket, a power device, a lifting mechanism and a table top; the lifting mechanism can be an X-shaped bracket or a plane four-bar mechanism; the power device drives the cross included angle of the X-shaped bracket to change, or the plane four-bar mechanism deforms, and then drives the tabletop to lift, and the device is characterized in that: the angle sensing device comprises an angle sensor, a first connecting piece and a second connecting piece; the first connecting piece and the second connecting piece are arranged in a crossing way, and are respectively and fixedly connected to the base and the rotation center of the angle sensor at the crossing position; the extending ends of the first connecting piece and the second connecting piece are respectively connected to two different structural members of the lifting table, and the two structural members relatively move when the lifting table is lifted; the control driving module is electrically connected with the angle sensor, the hand controller and the motor; the power supply module provides power for the control driving module, the angle sensor, the hand controller and the motor; the control driving module collects angle information of the angle sensor and calculates the height of the lifting table; the control driving module receives a lifting command signal of the hand controller, controls a motor of the driving power device to rotate, and further controls the lifting of the table.

2. The electric lift table height measurement and control device of claim 1, wherein: when the lifting table is lifted, the included angle between the first connecting piece and the second connecting piece is changed, so that the rotation center of the angle sensor rotates relative to the base of the angle sensor, and the internal state of the angle sensor is changed.

3. The electric lift table height measurement and control device of claim 1, wherein: the two structural members respectively connected with the extension ends of the first connecting piece and the second connecting piece can be a base bracket, an X-shaped bracket, a plane four-bar mechanism, a power device or a tabletop, and the connection modes can be fixed connection, rotational connection or sliding connection; and the two structural members drive the first connecting piece to rotate relative to the second connecting piece during relative movement.

4. The electric lift table height measurement and control device of claim 1, wherein: the size of an included angle formed by the intersection of the first connecting piece and the second connecting piece corresponds to the height value of the lifting table one by one; the control driving module collects and identifies angle information of the angle sensor, and then calculates the height value of the lifting table.

5. The electric lift table height measurement and control device of claim 1, wherein: the control driving module can identify the highest and lowest height reached by the lifting table, and limit the motor to continuously rotate at the highest and lowest positions so as to prevent the power device from exceeding the movable limit position.

6. The electric lift table height measurement and control device of claim 1, wherein: the hand controller comprises a key unit which can generate a lifting command signal; the lifting table also comprises a display unit which can display the current height information of the lifting table.