CN211672892U

CN211672892U - But weighing type safety automatic rising table

Info

Publication number: CN211672892U
Application number: CN201922321249.3U
Authority: CN
Inventors: 李迎; 李龙; 敖志斌
Original assignee: Okin Refined Electric Technology Co Ltd
Current assignee: Okin Refined Electric Technology Co Ltd
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-10-16
Anticipated expiration: 2029-12-21

Abstract

The utility model discloses a but weighing type safety automatic rising table belongs to the office supplies field, and protection mechanism includes: the device comprises a table, a lifting mechanism, a detection circuit, a comparison circuit, a control circuit and a control circuit, wherein the table is provided with a table top and a lifting mechanism, the detection circuit is a weighing sensor arranged between the table top and the lifting mechanism, the weighing sensor is used for detecting the pressure borne by the upper surface or the lower surface of the table top and outputting a pressure detection value; and the control circuit is coupled to the output end of the comparison circuit to receive the overvoltage signal and output a control signal to control the driving motor to stop working according to the overvoltage signal. This lift is last to be installed protection machanism for when the pressure that the table received reached certain pressure value, the driver can stop the function, improved the security of lift table.

Description

But weighing type safety automatic rising table

Technical Field

The utility model belongs to the technical field of office supplies and specifically relates to a but weighing type safety automatic rising table is related to.

Background

The lifting table, the lifting platform and the like are intelligent lifting office supplies with adjustable height, the height can be adjusted according to the height, sitting posture and standing posture of a person, and the intelligent lifting office supplies generally comprise an electric lifting office supply and a manual lifting office supply.

Prior art's electric lift table, as shown in fig. 6, its structure includes table 1 and table foot 2, be equipped with elevating system 3 between table 1 and the table foot 2, elevating system 3 passes through driving motor drive 4, elevating system 3 includes outer tube 32 with 2 fixed connection of table foot and inner tube 31 fixed with table 1, driving motor 4 sets up on table foot 2 in inner tube 31, be provided with casing 34 on driving motor 4, it is connected with elevator 35 to slide from top to bottom in casing 34, the upper end and the table 1 fixed connection of elevator 35, be equipped with in the elevator 35 with 4 output shaft fixed connection's of driving motor lead screw 33, be equipped with the internal thread with lead screw 33 looks adaptation on the inner wall of elevator 35, driving motor 4 drives the back of lead screw 33, can control elevator 35 and reciprocate, thereby can realize carrying out the regulation of height to table 1.

However, in the process of lifting up and down, if a person is under the table top or a certain part of the human body is clamped by the table top, the driving motor still drives the table top to move, certain damage can be caused to the human body, and certain potential safety hazards can exist in the lifting table.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a but weighing type safety automatic rising table should go up and down and install protection mechanism for when the table received decurrent pressure or ascending pressure and is greater than certain pressure value, driving motor can stop the function, has improved the security of lift table.

The above utility model discloses an above-mentioned utility model purpose can be realized through following technical scheme.

The utility model provides a but weighing type safety automatic rising table, includes table and table foot, be equipped with elevating system between table and the table foot, elevating system passes through driving motor drive, the table is equipped with the protection mechanism who is used for controlling driving motor stop work, protection mechanism includes:

the detection circuit is a weighing sensor arranged between the table plate and the lifting mechanism, and the weighing sensor is used for detecting the pressure on the upper surface or the lower surface of the table plate and outputting a pressure detection value;

the comparison circuit is coupled to the output end of the detection circuit to receive the pressure detection value, compare the pressure detection value with the preset value of the comparison circuit and output an overvoltage signal;

and the control circuit is coupled to the output end of the comparison circuit to receive the overvoltage signal and output a control signal to control the driving motor to stop working according to the overvoltage signal.

By adopting the technical scheme, when the lifting table descends, people can generate upward pressure on the lower surface of the table plate when the people are positioned under the table plate and prop against the lower surface of the table plate; people's hand or other positions are placed at the table upper surface, and at the in-process that rises when the lift table, hand or other positions are blocked when between table and windowsill, will produce decurrent pressure to the table, and when the pressure value that upper surface or the lower surface of table received was greater than the default, control circuit will control driving motor stall to make the human body be difficult for be injured, improved the security of lift table, make the table also difficult impaired simultaneously.

The utility model discloses further set up to: the bottom of table is equipped with the stay tube, the mounting groove with the inside intercommunication of stay tube is seted up to the bottom of stay tube, and weighing sensor passes the mounting groove and installs in the stay tube, and weighing sensor's fixed area and stay tube fixed connection, elevating system is equipped with the backup pad, is connected with the connecting piece between backup pad and weighing sensor's the district of meeting an emergency, leaves the activity space between backup pad and the stay tube.

Through adopting above-mentioned technical scheme, install weighing sensor in the stay tube, can reduce external factor weighing sensor's influence for weighing sensor detects more accurately, and weighing sensor is difficult for receiving the collision of foreign object simultaneously, makes weighing sensor difficult impaired.

The utility model discloses further set up to: the weighing sensor is fixed with the supporting tube through a bolt, the connecting piece is a screw, a supporting seat which is supported at the bottom of the strain area of the weighing sensor is arranged on the supporting plate, through holes for the connecting piece to pass through are formed in the supporting seat and the supporting plate, and the thread section of the connecting piece is in threaded connection with the strain area of the weighing sensor through the through holes.

Through adopting above-mentioned technical scheme, the supporting seat supports at the weighing sensor lower surface and with its reciprocal anchorage through the connecting piece, and the supporting seat can promote weighing sensor's strain area to move up or move down for weighing sensor's strain area takes place to warp, thereby can the output pressure detection value, through screw and bolt with weighing sensor respectively with stay tube and backup pad reciprocal anchorage, such structure can make things convenient for weighing sensor's installation and dismantlement.

The utility model discloses further set up to: the backup pad includes riser and with riser vertically diaphragm, riser and elevating system fixed connection, weighing sensor sets up on the diaphragm.

Through adopting above-mentioned technical scheme, the backup pad includes diaphragm and riser, constitutes the L template after diaphragm and riser are connected, and the riser is fixed on elevating system, and after the diaphragm atress, certain deformation can take place for the diaphragm for when the table receives too big pressure in the twinkling of an eye, can have certain buffering, make table and weighing sensor be difficult for impairedly.

The utility model discloses further set up to: the weighing sensors are four, and connecting lines among the four weighing sensors form a rectangle.

Through adopting above-mentioned technical scheme, four weighing sensor set up in the bottom of table uniformly to can detect the pressure that the table received more accurately, and can support the table more steadily, the table can be fixed more stably.

The utility model discloses further set up to: the lifting mechanisms are two, a connecting rod is arranged between the two lifting mechanisms, and the supporting plate is fixedly arranged on the connecting rod.

Through adopting above-mentioned technical scheme, be equipped with and connect through the connecting rod between two elevating system and two elevating system for the overall structure of lift table is more stable.

The utility model discloses further set up to: the supporting tubes are provided with two connecting rods, the two connecting rods are arranged between the two supporting tubes, and the adjacent connecting rods and the supporting tubes are in clearance fit.

The phenomenon of horizontal hunting can appear receiving the in-process of pressure in the table, through adopting above-mentioned technical scheme, two stay tubes can control the connecting rod spacing for the table only can vertical motion after receiving pressure, thereby make the precision that weighing sensor detected more accurate, weighing sensor is difficult for also damaging simultaneously.

To sum up, the utility model discloses a beneficial technological effect does:

the protection mechanism is arranged on the table plate, and when the downward pressure or the upward pressure on the table plate is greater than a preset value, the driving motor can be controlled to stop moving, so that the safety of the lifting table can be improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a circuit diagram of a protection mechanism of the present invention;

fig. 5 is a perspective view of a load cell according to the present invention;

fig. 6 is a schematic diagram of a prior art structure.

In the figure, 1, a table plate; 2. a table leg; 3. a lifting mechanism; 31. an inner tube; 32. an outer tube; 33. a lead screw; 34. a housing; 35. a lifting pipe; 4. a drive motor; 5. a protection mechanism; 51. a weighing sensor; 511. a fixed zone; 512. a strained region; 52. a comparison circuit; 53. a control circuit; 6. supporting a tube; 7. mounting grooves; 8. a movable gap; 9. a through hole; 10. a support plate; 101. a vertical plate; 102. a transverse plate; 11. a connecting member; 12. a bolt; 13. a supporting seat; 14. a connecting rod.

Detailed Description

Referring to fig. 1 and 2, in order to disclose a weighing type safe and automatic lifting table, the weighing type safe and automatic lifting table comprises two table legs 2, lifting mechanisms 3 are respectively and fixedly arranged on the table legs 2, a table plate 1 is arranged on the two lifting mechanisms 3, the lifting of the table plate 1 can be controlled through the two lifting mechanisms 3, and the lifting mechanisms 3 are driven through a driving motor 4; elevating system 3 includes outer tube 32 of 2 fixed connection of table feet and inner tube 31 fixed with table 1, driving motor 4 sets up on table foot 2 in inner tube 31, be provided with casing 34 on the driving motor 4, it is connected with elevator 35 to slide from top to bottom in casing 34, the upper end and the table 1 fixed connection of elevator 35, be equipped with the lead screw 33 with 4 output shaft fixed connection of driving motor in the elevator 35, be equipped with the internal thread with lead screw 33 looks adaptation on the inner wall of

elevator

35, 4 drive lead screw 33 of driving motor rotate the back, can control elevator 35 and reciprocate, thereby can realize carrying out the regulation of height to table 1.

Referring to fig. 3 and 4, be provided with two stay tubes 6 that are parallel to each other at the lower surface of table 1, two connecting rods 14 of fixedly connected with between two elevating system 3, two backup pads 10 have set firmly respectively on the lateral wall of every connecting rod 14, two backup pads 10 set firmly respectively on the lateral wall at connecting rod 14 both ends, backup pad 10 is including setting firmly riser 101 on connecting rod 14 and the diaphragm 102 of being connected perpendicularly with riser 101, be equipped with protection machanism 5 between adjacent diaphragm 102 and stay tube 6, protection machanism 5 includes: the detection circuit is arranged as a weighing sensor 51 and is fixedly connected between the support tube 6 and the transverse plate 102, and the weighing sensor 51 is used for detecting the pressure on the upper surface or the lower surface of the table plate 1 and outputting a pressure detection value; the comparison circuit 52 comprises a comparator A, a resistor R1 and a resistor R2, wherein the positive input end of the comparator A is coupled to the output end of the weighing sensor 51, the resistor R1 is connected between the reverse input end of the comparator A and direct current VCC in series, the resistor R2 is connected between the reverse end of the comparator A and the ground in series, and the voltage value at the two ends of the resistor R2 is the preset value of the comparison circuit 52; the control circuit 53 comprises a triode Q, a relay KM and a freewheeling diode D, wherein the relay KM is provided with a coil and a normally closed contact KM-1, the coil of the relay KM is connected between a collector of the triode Q and a power supply VCC in series, the normally closed contact KM-1 of the relay KM is connected in a power supply loop of the driving motor 4 in series, a base electrode of the triode Q is coupled to the output end of the comparator A, and an emitter electrode of the triode Q is coupled to the ground; the anode of the freewheeling diode D is coupled to the connection point of the collector electrodes of the relay KM and the triode Q, and the cathode of the freewheeling diode D is coupled to a power supply VCC. When the pressure value detected by the weighing sensor 51 is greater than the preset value of the comparison circuit 52, the triode Q is conducted, the relay KM is electrified, the normally closed contact KM-1 is opened, and the driving motor 4 stops working.

The bottom of support tube 6 is seted up with the inside mounting groove 7 that communicates of support tube 6, weighing sensor 51 passes mounting groove 7 and fixes in support tube 6 through bolt 12, it is shown as figure 5 to combine again, weighing sensor 51's fixed area 511 passes bolt 12 and support tube 6 fixed connection, be equipped with connecting piece 11 between weighing sensor 51's strain area 512 and the diaphragm 102, be provided with supporting seat 13 on diaphragm 102, connecting piece 11 is the screw, be equipped with the through-hole 9 that supplies the screw thread section of connecting piece 11 to pass on diaphragm 102 and supporting seat 13, the screw thread section of connecting piece 11 realizes threaded connection through-hole 9 and weighing sensor 51's strain area 512, make weighing sensor 51's strain area 512 fasten on supporting seat 13, leave movable space 8 between weighing sensor 51 and the diaphragm 102.

As shown in fig. 2 and 3, the two connecting rods 14 are arranged between the two connecting pipes, and the adjacent connecting rods 14 are in clearance fit with the connecting pipes, so that the two connecting pipes can limit the two connecting rods 14 in the left-right direction, and the table top is not easy to swing in the left-right direction.

The implementation principle of the embodiment is as follows: the driving motor 4 drives the screw 33 to rotate, so that the height of the table board 1 can be adjusted, when the table board 1 is found to be under downward pressure or under upward pressure greater than a preset value, the control circuit 53 controls the driving motor 4 to stop rotating, the table board 1 can be immediately stopped to lift, the safety of the lifting table is greatly improved, and the table board 1 is not easy to damage.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a but weighing type safety automatic rising table, includes table (1) and table foot (2), be equipped with elevating system (3) between table (1) and table foot (2), elevating system (3) are through driving motor (4) drive, its characterized in that: table (1) is equipped with protection mechanism (5) that are used for controlling driving motor (4) stop work, protection mechanism (5) include:

the detection circuit is a weighing sensor (51) arranged between the table plate (1) and the lifting mechanism (3), and the weighing sensor (51) is used for detecting the pressure applied to the upper surface or the lower surface of the table plate (1) and outputting a pressure detection value;

a comparison circuit (52) coupled to the output end of the detection circuit for receiving the pressure detection value, comparing the pressure detection value with a preset value of the comparison circuit (52), and outputting an overvoltage signal when the pressure detection value is greater than the preset value;

and the control circuit (53) is coupled to the output end of the comparison circuit (52) to receive the overvoltage signal and output a control signal to control the driving motor (4) to stop working according to the overvoltage signal.

2. The weighing type safe automatic lifting table as claimed in claim 1, wherein: the bottom of table (1) is equipped with stay tube (6), mounting groove (7) with the inside intercommunication of stay tube (6) are seted up to the bottom of stay tube (6), and install in stay tube (6) mounting groove (7) weighing sensor (51) pass, and the fixed area (511) and stay tube (6) fixed connection of weighing sensor (51), elevating system (3) are equipped with backup pad (10), are connected with between backup pad (10) and strain area (512) of weighing sensor (51) connecting piece (11), leave activity space (8) between backup pad (10) and stay tube (6).

3. A weighing type safe automatic lifting table as claimed in claim 2, wherein: weighing sensor (51) are fixed with stay tube (6) through bolt (12), connecting piece (11) are the screw, be equipped with supporting seat (13) of support in weighing sensor (51) strain area (512) bottom on backup pad (10), set up through-hole (9) that supply connecting piece (11) to pass through on supporting seat (13) and backup pad (10), threaded connection is realized through-hole (9) and strain area (512) of weighing sensor (51) to the screw thread section of connecting piece (11).

4. A weighing type safe automatic lifting table as claimed in claim 3, wherein: the supporting plate (10) comprises a vertical plate (101) and a transverse plate (102) perpendicular to the vertical plate (101), the vertical plate (101) is fixedly connected with the lifting mechanism (3), and the weighing sensor (51) is arranged on the transverse plate (102).

5. A weighable safety automatic lifting table as in claim 4, wherein: four weighing sensors (51) are arranged, and connecting lines among the four weighing sensors (51) form a rectangle.

6. A weighable safety automatic lifting table as in claim 5, characterized in that: the lifting mechanism (3) is two, a connecting rod (14) is arranged between the two lifting mechanisms (3), and the supporting plate (10) is fixedly arranged on the connecting rod (14).

7. The weighing type safe automatic lifting table as claimed in claim 6, wherein: the two weighing sensors (51) are arranged on one connecting rod (14), and the two weighing sensors (51) are respectively fixed on the side walls at the two ends of the connecting rod (14).

8. The weighing type safe automatic lifting table as claimed in claim 7, wherein: the two support pipes (6) are arranged, the two connecting rods (14) are arranged between the two support pipes (6), and the adjacent connecting rods (14) are in clearance fit with the support pipes (6).