Lifting heating table

Abstract

The utility model discloses a lifting heating table which comprises a table top plate, a lifting mechanism and a driving device, the driving device comprises a motor, a screw rod, a movable piece, a first touch switch, a second touch switch and a third touch switch, and the output end of the motor and the movable piece are respectively in transmission connection with the screw rod. The first touch switch, the second touch switch and the third touch switch are arranged on one side of the screw rod and electrically connected with the control circuit board, the screw rod rotates to drive the movable part to move, when the movable part moves to touch the first touch switch, the lifting mechanism drives the table top plate to ascend to the highest position, and when the movable part moves to touch the second touch switch, the lifting mechanism drives the table top plate to ascend to the highest position. When the movable part moves to touch the third touch switch, the lifting mechanism drives the universal wheel to descend to the lowest position, and the bottom of the universal wheel protrudes out of the bottom face of the supporting column. The first touch switch, the second touch switch, the third touch switch and the movable piece are matched, the lifting range of the lifting mechanism is limited, and operation is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of heating table technology, and in particular to an electric lifting heating table. Background Technology

[0002] Most existing electric heating tables only have a tabletop lifting function. The overall weight of electric heating tables makes them difficult to move. Therefore, lifting casters are added to the bottom of the electric heating table. When the electric heating table needs to be moved, the casters extend from the bottom of the table and lift the entire table. In this way, the electric heating table can be moved easily by the casters. However, the extension distance of the casters is difficult to control and needs further improvement. Utility Model Content

[0003] The purpose of this invention is to provide a height-adjustable heating table with omnidirectional wheels.

[0004] The purpose of this utility model is achieved as follows.

[0005] A height-adjustable heating table includes a tabletop, a support column, a base plate, a lifting mechanism, and a drive device. The lifting mechanism is housed within the support column, with its top supporting and driving the tabletop to rise and fall. The bottom of the lifting mechanism has casters that drive the tabletop to rise and fall. The base plate is fixed to the bottom of the support column. The drive device drives the lifting mechanism to rise and fall via a transmission rod and is fixed to the base plate. The drive device includes a motor, a housing, and a screw, a movable component, a first touch switch, a second touch switch, a third touch switch, and a control circuit board housed within the housing. The screw is rotatably mounted within the housing, and the transmission rod is drive-connected to the screw. The motor is fixed to the housing, and its output end is drive-connected to the screw. The movable component is threadedly connected to the screw. The first, second, and third touch switches are located on one side of the screw and electrically connected to the control circuit board. Rotation of the screw causes the movable component to move.

[0006] When the movable part moves to the point of triggering the first touch switch, the lifting mechanism raises the desktop to the highest position. When the movable part moves to the point of triggering the second touch switch, both the desktop and the casters are in their initial positions. When the movable part moves to the point of triggering the third touch switch, the lifting mechanism lowers the casters to the lowest position, with the bottom of the casters protruding from the bottom surface of the support column.

[0007] This utility model limits the lifting range of the lifting mechanism through the cooperation of a first touch switch, a second touch switch, a third touch switch and a movable component. It operates stably and reliably. The overall structure of the drive device is compact, which can reduce the size and simplify the assembly process of the lifting heating table.

[0008] The above technical solution can be further improved as follows.

[0009] In a more specific design, the first, second, and third touch switches are all fixed on the same side of the control circuit board. The first and third touch switches are arranged on the same straight line, and the second touch switch is parallel to this straight line. The second touch switch is located near the third touch switch, and the trigger end of the second touch switch is between the trigger ends of the first and third touch switches. The position design is reasonable and reduces the size of the control circuit board.

[0010] A more specific solution involves the second and third touch switches abutting against each other on their sides, further reducing the size of the control circuit board.

[0011] In a more specific embodiment, the movable component extends circumferentially with a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion. The housing includes a front shell and a rear shell. The front shell has a first sliding groove, and the corresponding rear shell has a third sliding groove. When the front and rear shells are closed, they form a second sliding groove, a fourth sliding groove, a mounting cavity, and a rotating cavity. A screw rotates within the rotating cavity. A first, second, and third touch switches and a control circuit board are fixed within the mounting cavity. The mounting cavity and the rotating cavity are connected through the fourth sliding groove. The screw drives the movable component to move. The first protrusion moves within the first sliding groove, the second protrusion moves within the second sliding groove, the third protrusion moves within the third sliding groove, and the fourth protrusion moves within the fourth sliding groove. During its movement, the fourth protrusion actuates the trigger end of either the first, second, or third touch switch. The movable component moves linearly and does not rotate, making the installation of components within the drive device easy.

[0012] More specifically, the fourth protrusion includes two parallel protrusions flush with each other in the axial direction of the screw. One protrusion is used to activate either the first or third contact switch, and the other protrusion is used for the second contact switch. The fourth protrusion activates either the first, second, or third contact switch during its movement.

[0013] A more specific design involves a third groove penetrating the rear housing, with a third protrusion extending to the bottom of the groove, and the end face of the third protrusion not protruding beyond the outer side of the rear housing. This allows for easy viewing of the position of moving parts through the third protrusion, making testing of the drive mechanism simple and intuitive.

[0014] A more specific design features slots on both sides of the mounting cavity on the front housing. The control circuit board is inserted into its corresponding slots at both ends, with a heat dissipation space between the back of the control circuit board and the housing. This design facilitates easy installation of the control circuit board, and the heat dissipation space contributes to its stable operation.

[0015] A more specific design involves a positioning post within the mounting cavity of the rear housing, and positioning holes on the first and / or third touch switches. The positioning post is inserted into the corresponding positioning hole. The positioning post prevents the control circuit board from dislodging from the slot.

[0016] A more specific design features a long, narrow positioning groove on the rear shell and a corresponding positioning protrusion on the front shell. The positioning protrusion inserts into the positioning groove to align and close the front and rear shells. This results in precise shell assembly and easy operation.

[0017] The beneficial effects of this utility model are as follows.

[0018] (1) This utility model limits the lifting range of the lifting mechanism by cooperating with the first touch switch, the second touch switch, the third touch switch and the moving parts, thereby controlling the lifting distance of the desktop and the casters. The operation is stable and reliable. The overall structure of the drive device is compact, which can reduce the volume and simplify the assembly process of the lifting heating table.

[0019] (2) The positions of the first, second and third touch switches are reasonably designed to reduce the size of the control circuit board.

[0020] (3) The slots facilitate the installation of the control circuit board, and the positioning posts prevent the control circuit board from falling out of the slots. The heat dissipation space helps the control circuit board to operate stably.

[0021] (4) The moving parts move in a straight line and do not rotate, making it easy to install the components inside the drive unit. The third slide groove runs through the rear shell, making it convenient to view the position of the moving parts through the third protrusion, and making the test of the drive unit easy and intuitive. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0023] Figure 2 This is a schematic diagram of the internal structure of the drive device in Embodiment 1.

[0024] Figure 3 This is an exploded structural diagram (front view) of the drive device in Embodiment 1.

[0025] Figure 4 This is an exploded view (back side) of the drive device in Embodiment 1.

[0026] Figure 5 This is a schematic diagram of the structure of the first lifting device in Embodiment 1.

[0027] Figure 6 for Figure 5 A schematic diagram of its decomposed structure.

[0028] Figure 7 This is a schematic diagram of the second lifting device in Embodiment 1. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1, see Figure 1-7As shown, a height-adjustable heating table includes a tabletop 1, support columns 11, a base plate 12, a lifting mechanism 2, caster wheel assemblies 5, and a drive device 6. Four support columns 11 are fixed to the four corners of the base plate 12, and each support column 11 is hollow. The lifting mechanism 2 includes two sets of first lifting devices 3 and two sets of second lifting devices 4. Both the first lifting device 3 and the second lifting device 4 include a mounting base 40, a transmission screw 41, a lifting helical gear 42, a lifting screw 43, a nut 44, a support tube 45, a pressure plate 46, a pin 47, a first spring 48, and a second spring 49. Mounting base 40 is fixed to the bottom of support column 11. Transmission screw 41 and lifting helical gear 42 are both located within mounting base 40. Transmission screw 41 is horizontally positioned, and lifting helical gear 42 is positioned above transmission screw 41 and meshes with it. Lifting screw 43 is vertically positioned, with its bottom extending into mounting base 40 to connect with and drive lifting helical gear 42. Nut 44, support tube 45, and pressure plate 46 are fitted onto lifting screw 43. Nut 44 and lifting screw 43 are threaded together, and support tube 45 and nut 44 are inserted into each other. The top of support tube 45 extends out of support column 11 and is fixed to desktop plate 1. Mounting base 40 has four vertically positioned through holes around its perimeter. Pressure plate 46 is positioned below nut 44, and pin 47 passes through these through holes. The top of pin 47 connects to pressure plate 46, and the bottom of pin 47 connects to caster wheel assembly 5. The first spring 48 is sleeved on the lifting screw 43, with its top abutting against the pressure plate 46 and its bottom abutting against the mounting base 40. The second spring 49 is sleeved on the pin 47, with its top abutting against the pressure plate 46 and its bottom abutting against the mounting base 40. The first lifting device 3 also includes a transmission helical gear 31, which is housed within the mounting base 40 and meshes with the lifting helical gear 42. With the first spring 48 and the four second springs 49 evenly stressed, the universal wheel assembly 5 operates stably.

[0031] Two sets of first lifting devices 3 and two sets of second lifting devices 4 are vertically installed in the support columns 11. Preferably, one set of first lifting devices 3 and one set of second lifting devices 4 are installed in the two support columns 11 on the same side. The positions of the first lifting devices 3 and the second lifting devices 4 on the left and right sides are symmetrical. That is, the transmission screws 41 of the two sets of first lifting devices 3 are synchronously driven by a transmission rod 13, and the transmission screws 41 of the second lifting devices 4 are synchronously driven by the corresponding transmission helical gears 31 of the first lifting devices 3 through another transmission rod 13.

[0032] The rotation of the transmission screw 41 drives the lifting helical gear 42 to rotate, which in turn drives the lifting screw 43 to rotate. The nut 44 rises or falls relative to the lifting screw 43, and the nut 44 drives the desktop plate 1 to rise or fall through the support tube 45. When the nut 44 falls relative to the lifting screw 43, it presses down on the pressure plate 46. The pressure plate 46 pushes the pin 47 down and compresses the first spring 48 and the second spring 49. The pin 47 moves down, causing the universal wheel assembly 5 to move down, i.e., the universal wheel assembly 5 protrudes from the bottom surface of the support column 11. Then the nut 44 rises relative to the lifting screw 43. As the nut 44 rises, the elastic force of the first spring 48 and the second spring 49 pushes the pressure plate 46 up to reset. The pressure plate 46 drives the pin 47 to rise, i.e., the universal wheel assembly 5 rises and retracts into the support column 11.

[0033] The drive unit 6 is fixed on the base plate 12. The drive unit 6 includes a motor 60, a housing 7, and a screw 61, a movable part 8, a first touch switch 91, a second touch switch 92, a third touch switch 93 and a control circuit board 9 disposed in the housing 7.

[0034] The housing 7 includes a front housing 71 and a rear housing 72. The front housing 71 has a first sliding groove 711, and the corresponding rear housing 72 has a third sliding groove 721 that penetrates through the rear housing 72. The rear housing 72 has an elongated positioning groove 722, and the corresponding front housing 71 has a positioning protrusion 712. The positioning protrusion 712 is inserted into the positioning groove 722 to align and close the front housing 71 and the rear housing 72. After the front housing 71 and the rear housing 72 are closed, a second sliding groove 73, a fourth sliding groove 74, a mounting cavity 75, and a rotating cavity 76 are formed. The mounting cavity 75 and the rotating cavity 76 are connected through the fourth sliding groove 74.

[0035] The screw 61 is rotatably mounted inside the rotating cavity 76, and the transmission rod 13 is connected to the screw 61 in a transmission manner.

[0036] The movable part 8 and the screw 61 are threadedly connected. The movable part 8 has a first protrusion 81, a second protrusion 82, a third protrusion 83, and a fourth protrusion 84 extending circumferentially. The first protrusion 81 moves within the first slide groove 711, the second protrusion 82 moves within the second slide groove 73, the third protrusion 83 moves within the third slide groove 721, and the fourth protrusion 84 moves within the fourth slide groove 74. The fourth protrusion 84 includes two parallel protrusions 85, which are flush with each other in the axial direction of the screw 61. Preferably, the third protrusion 83 extends to the bottom of the third slide groove 721, and the end face of the third protrusion 83 does not protrude beyond the outer side of the rear shell 72.

[0037] The first actuating switch 91, the second actuating switch 92, the third actuating switch 93, and the control circuit board 9 are fixed inside the mounting cavity 75, on one side of the screw 61. The first actuating switch 91, the second actuating switch 92, and the third actuating switch 93 are all fixed on the same side of the control circuit board 9 (the front side of the control circuit board 9). Specifically, the first actuating switch 91 and the third actuating switch 93 are arranged on the same straight line, the second actuating switch 92 is parallel to this straight line, and is located near the third actuating switch 93. The actuating end of the second actuating switch 92 is between the actuating ends of the first actuating switch 91 and the third actuating switch 93, and the sides of the second actuating switch 92 and the third actuating switch 93 abut against each other. The first actuating switch 91, the second actuating switch 92, the third actuating switch 93, and the motor 60 are all electrically connected to the control circuit board 9.

[0038] The front housing 71 has slots 713 on both sides of the mounting cavity 75. The two ends of the control circuit board 9 are inserted into the corresponding slots 713. A heat dissipation space 78 is left between the back of the control circuit board 9 and the housing 7. The rear housing 72 has a positioning post 723 in the mounting cavity 75. The third touch switch 93 has a positioning hole 931, and the positioning post 723 is inserted into the corresponding positioning hole 931. The rotation of the screw 61 drives the moving part 8 to move. During the movement of the fourth protrusion 84, one protrusion 85 is used to activate the first touch switch 91 or the third touch switch 93, and the other protrusion 85 is used for the second touch switch 92.

[0039] In this embodiment, the motor 60 drives the screw 61 to rotate. During the rotation, the screw 61 drives the movable part 8 to move linearly. When the movable part 8 moves to the right, the lifting mechanism 2 drives the desktop 1 to rise until the protrusion 85 of the movable part 8 touches the first touch switch 91. At this time, the motor 60 stops rotating and the desktop 1 rises to the highest position. Conversely, when the motor 60 rotates in the opposite direction, that is, the movable part 8 moves to the left, the lifting mechanism 2 drives the desktop 1 to fall until the other protrusion 85 of the movable part 8 touches the second touch switch 92. At this time, the desktop 1 falls to the initial position, and the universal wheel assembly 5 is also in the initial position. The lifting mechanism 2 begins to lower the caster assembly 5, that is, it lowers the caster 51, until the protrusion 85 of the movable part 8 touches the third touch switch 93. The lifting mechanism 2 then lowers the caster 51 to its lowest position. During this process, the desktop 1 also lowers from its initial position along with the caster 51. The bottom of the caster 51 protrudes from the bottom surface of the support column 11. At this point, the motor 60 stops rotating, and the lifting mechanism 2 will not continue to lower the caster 51. The heating table can then be moved using the caster 51. Afterward, the lifting mechanism 2 raises the desktop 1 back to its initial position (the movable part 8 touches the second touch switch). The first spring 48 and the second spring 49 also push the caster 51 upward to reset, that is, the caster 51 also returns to its initial position. The lifting mechanism 2 then raises the desktop 1 again, while the caster 51 remains in its initial position.

Claims

1. A lifting heating table, comprising a table top panel (1), a support column (11), a bottom plate (12), a lifting mechanism (2) and a driving device (6), the lifting mechanism (2) is arranged in the support column (11), the lifting mechanism (2) supports and drives the table top panel (1) to lift, the bottom of the lifting mechanism (2) is provided with a universal wheel (51) and drives the universal wheel (51) to lift, the bottom plate (12) is fixed at the bottom of the support column (11), the driving device (6) drives the lifting mechanism (2) to lift through a transmission rod (13), characterized in that, The driving device (6) is fixed on the bottom plate (12), the driving device (6) includes a motor (60), a shell (7) and a screw rod (61) arranged in the shell (7), a movable piece (8), a first touch switch (91), a second touch switch (92), a third touch switch (93) and a control circuit board (9), the screw rod (61) is rotatably arranged in the shell (7), the transmission rod (13) and the screw rod (61) are in transmission connection, the motor (60) is fixed on the shell (7), the output end of the motor (60) and the screw rod (61) are in transmission connection, the movable piece (8) and the screw rod (61) are in threaded connection, the first touch switch (91), the second touch switch (92) and the third touch switch (93) are arranged on one side of the screw rod (61) and are electrically connected with the control circuit board (9), the screw rod (61) rotates to drive the movable piece (8) to move, When the movable piece (8) moves to touch the first touch switch (91), the lifting mechanism (2) drives the tabletop panel (1) to rise to the highest position, When the movable piece (8) moves to touch the second touch switch (92), the tabletop panel (1) and the universal wheel (51) are both in the initial position, When the movable piece (8) moves to touch the third touch switch (93), the lifting mechanism (2) drives the universal wheel (51) to descend to the lowest position, and the bottom of the universal wheel (51) protrudes to support the bottom surface of the column (11).

2. The lift-heated table according to claim 1, characterized in that, The first touch switch (91), the second touch switch (92) and the third touch switch (93) are all fixed on the same side of the control circuit board (9), the first touch switch (91) and the third touch switch (93) are arranged on the same straight line, the second touch switch (92) is parallel to the straight line, the second touch switch (92) is arranged close to the third touch switch (93), and the touch end of the second touch switch (92) is between the touch ends of the first touch switch (91) and the third touch switch (93).

3. The lift-heated table according to claim 2, characterized in that, The second touch switch (92) and the third touch switch (93) abut on the side surfaces.

4. The lift-heated table according to claim 2, wherein The movable part (8) extends in the circumference direction respectively with a first protrusion (81), a second protrusion (82), a third protrusion (83) and a fourth protrusion (84), the shell (7) comprises a front shell (71) and a rear shell (72), the front shell (71) is provided with a first sliding groove (711), the corresponding rear shell (72) is provided with a third sliding groove (721), the front shell (71) and the rear shell (72) are folded to form a second sliding groove (73), a fourth sliding groove (74), a mounting cavity (75) and a rotating cavity (76) after being folded, the screw rod (61) rotates in the rotating cavity (76), the first touch switch (91), the second touch switch (92), the third touch switch (93) and the control circuit board (9) are fixed in the mounting cavity (75), the mounting cavity (75) and the rotating cavity (76) are communicated through the fourth sliding groove (74), the screw rod (61) drives the movable part (8) to move, the first protrusion (81) moves in the first sliding groove (711), the second protrusion (82) moves in the second sliding groove (73), the third protrusion (83) moves in the third sliding groove (721), the fourth protrusion (84) moves in the fourth sliding groove (74), the fourth protrusion (84) touches the touch end of the first touch switch (91) or the second touch switch (92) or the third touch switch (93) during the movement.

5. The lift-heated table according to claim 4, characterized in that The fourth protrusion (84) comprises two protrusions (85) arranged in parallel, the two protrusions (85) are in flush position in the axial direction of the screw rod (61), one protrusion (85) is used for touching the first touch switch (91) or the third touch switch (93), and the other protrusion (85) is used for the second touch switch (92).

6. The lift-heated table of claim 4, wherein, The third sliding groove (721) penetrates the rear shell (72), the third protrusion (83) extends to the bottom of the third sliding groove (721), and the end face of the third protrusion (83) does not protrude out of the outer side of the rear shell (72).

7. The lift-heated table of claim 4, wherein, The front shell (71) is provided with a slot (713) on both sides of the mounting cavity (75), the control circuit board (9) is inserted into the corresponding slot (713) at both ends respectively, and a heat dissipation space (78) is left between the back of the control circuit board (9) and the shell (7).

8. The lift-heated table of claim 4, wherein, The rear shell (72) is provided with a positioning column (723) in the mounting cavity (75), the first touch switch (91) and / or the third touch switch (93) is provided with a positioning hole (931), and the positioning column (723) is inserted into the corresponding positioning hole (931).

9. The lift-heated table of claim 4, wherein, The rear shell (72) is provided with a long strip-shaped positioning groove (722), and the corresponding front shell (71) is provided with a positioning protrusion (712), the positioning protrusion (712) is inserted into the positioning groove (722) to align and fold the front shell (71) and the rear shell (72).

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