Electric heating table
By independently driving the caster assembly of the electric heating table to raise and lower, the problems of contamination and entanglement of the curtain during the raising and lowering process are solved, realizing the uninterrupted raising and lowering of the curtain and casters, thus improving hygiene and reliability.
Patent Information
- Application Number
- CN202423282756.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The curtains of existing electric heating tables are prone to getting dirty when they are lowered by the lifting mechanism, and there is a risk of them getting caught in the legs, which affects hygiene.
The lifting mechanism independently drives the raising and lowering of the caster assembly, avoiding interference between the height of the curtain and the raising and lowering of the caster assembly. A combination of motor-driven transmission rod, screw and nut is used to drive the synchronous movement of the middle layer and the caster assembly, ensuring that the curtain is not affected by the casters.
The independent lifting of the curtain and caster assembly is achieved, avoiding curtain contamination and the risk of being caught in the curtain. The reasonable structural design reduces the failure rate and cost.
Smart Images
Figure CN223830577U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric heating table technology, specifically to an electric heating table with adjustable feet. Background Technology
[0002] Currently, existing electric heating tables with height adjustment functions use a lifting mechanism to raise and lower the tabletop. To facilitate movement, the tabletop also has feet that extend beyond the table's bottom, driven by the lifting mechanism. Furthermore, to improve heat retention, these tables typically have a curtain around the edge of the tabletop, with a fixed height and the bottom slightly above the ground. However, the lifting mechanism lowers the tabletop to its lowest position before extending the feet, causing the curtain to descend with the tabletop. This makes the bottom of the curtain prone to accumulating dirt and is unhygienic. Additionally, there is a risk of the curtain getting caught in the feet. Utility Model Content
[0003] The purpose of this invention is to provide an electric heating table with a curtain that is not affected by the movement of the caster assembly.
[0004] The purpose of this utility model is achieved as follows.
[0005] An electric heating table includes a tabletop, table legs, a middle layer, a base box, a lifting mechanism, and a caster assembly. The tabletop is supported by the top of the table legs, and the base box is located at the bottom of the table legs.
[0006] The lifting mechanism includes a motor, a transmission rod, a nut, a gearbox, and a screw. The gearbox is fixed inside the base box. Each table leg has a vertically arranged screw on its side. The bottom of the screw is connected to the gear set in the corresponding gearbox. The gear sets between gearboxes are synchronously connected via the transmission rod. The nut and the middle layer are integrated. The nut and the screw are threaded together. A first blocking part is provided on the side of the table leg. The screw is located between the side of the table leg and the first blocking part. The nut has a sleeve hole for the first blocking part to pass through. A pressing part extends downward from the bottom of the nut and fits onto the screw. A second blocking part is provided between the bottom of the first blocking part and the base box.
[0007] The caster assembly includes a mounting frame and casters mounted at the bottom of the mounting frame. The mounting frame includes a first mounting plate, at least two support columns, and a second mounting plate. The gearbox has vertical guide holes, and the support columns pass through the corresponding guide holes. The first mounting plate is positioned above the gearbox, and the second mounting plate is positioned below the gearbox. The tops of the support columns are connected and fixed to the first mounting plate, and the bottoms of the support columns are connected and fixed to the second mounting plate. The casters are mounted on the bottom surface of the second mounting plate. The top surface of the base box has clearance holes, and a second blocking part blocks the clearance holes. The second blocking part and the top surface of the base box form a cavity for the second mounting plate to move up and down after passing through the clearance holes.
[0008] The motor drives any transmission rod to rotate, which in turn drives the screw to rotate. The nut moves up or down as the screw rotates forward or in the opposite direction, and the nut drives the middle layer to move up or down.
[0009] When the nut descends to the preset height, the pressing part abuts against the first mounting plate, and the nut continues to descend. The pressing part pushes the caster assembly to descend as a whole until the lowest point of the caster contacts the ground and the bottom of the table leg is suspended above the ground.
[0010] This invention uses a lifting mechanism that drives the middle layer to lift and lower to move the caster assembly. The lifting and lowering of the caster assembly is independent of the height of the tabletop, thus avoiding interference between the height of the curtain installed on the tabletop and the lifting and lowering of the caster assembly.
[0011] The above technical solution can be further improved as follows.
[0012] Furthermore, the base box includes a base plate, a second mounting plate and casters are located on the bottom surface of the base plate, the base plate has mounting holes for the support columns to pass through, and the gearbox is fixed to the top surface of the base plate.
[0013] The lifting mechanism is simple and easy to install.
[0014] Furthermore, when the lifting mechanism rises to the preset height, the pressing part moves away from the caster assembly and disengages from the first mounting plate. Under the action of gravity, the caster assembly rises as a whole until the bottom surface of the table leg contacts the ground.
[0015] The caster assembly lifting mechanism is simple to implement, not prone to failure, and low in cost.
[0016] The lifting mechanism of this utility model can lift the middle layer and also lift the caster assembly. The overall structure is reasonably designed to avoid conflict between the lifting of the caster assembly and the height of the tabletop, thus avoiding affecting the use of the curtain. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of Example 1.
[0018] Figure 2 This is a schematic diagram of the bottom structure of the electric heating table in Example 1.
[0019] Figure 3 This is a schematic diagram of the exploded structure of Example 1.
[0020] Figure 4 This is a schematic diagram of the synchronous drive mechanism in Embodiment 1.
[0021] Figure 5 This is a cross-sectional structural diagram of Example 1. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Example 1, see Figure 1-5 As shown, an electric heating table includes a tabletop 1, table legs 2, a middle layer 3, a base box 4, a lifting mechanism 5, and a caster assembly 6.
[0024] The table legs 2 support the tabletop 1 at the top, and the base box 4 is fixed to the bottom of the table legs 2. In this embodiment, the bottom surface of the base box 4 is higher than the bottom surface of the table legs 2. There are four table legs 2.
[0025] The lifting mechanism 5 includes a motor 51, a transmission rod 52, a nut 53, a gearbox 54, and a screw 55. The motor 51 and gearbox 54 are installed inside the base box 4. Each table leg 2 has a vertically arranged screw 55 on its side. The bottom of each screw 55 is connected to an internal gear set in the gearbox 54. The gear sets 56 inside the gearbox 54 are connected via the transmission rod 52. The motor 51 drives the transmission rod 52 to rotate via a worm gear reducer. Each screw 55 is threadedly connected to a nut 53, which is fixedly connected to the middle layer 3. The motor 51 drives the screw 55 to rotate synchronously in the forward or reverse direction via the transmission rod 52 and the gear set 56 of the gearbox 54. The nut 53 moves up or down with the forward or reverse rotation of the screw 55, causing the middle layer 3 to move up or down. Preferably, the nut 53 and the middle layer 3 are integrated. A pressing part 57 extends downward from the bottom of the nut 53 and is fitted onto the screw 55.
[0026] The caster assembly 6 includes a mounting frame 7 and casters 61 disposed at the bottom of the mounting frame 7. In this embodiment, the mounting frame 7 includes a first mounting plate 71, at least two support columns 72, and a second mounting plate 73. The top of the support columns 72 is connected and fixed to the first mounting plate 71, and the bottom of the support columns 72 is connected and fixed to the second mounting plate 73. The casters 61 are mounted on the bottom surface of the second mounting plate 73. The gearbox 54 is provided with a vertical guide hole 58, and the support columns 72 pass through the guide hole 58. The first mounting plate 71 is positioned above the gearbox 54 and below the clearance hole 41, and the second mounting plate 73 is positioned below the gearbox 54.
[0027] The top surface of the base box 4 is provided with a clearance hole 41. The base box 4 includes a triangular base plate 42, a second mounting plate 73 and casters 61 are provided on the bottom surface of the base plate 42. The base plate 42 is provided with a mounting hole 43 for the support column 72 to pass through. The gearbox 54 is fixed to the top surface of the base plate 42. In this embodiment, the pressing part 57 moves up and down along the screw 55 with the nut 53. The side of the table leg 2 is provided with a first blocking part 21 to block the screw 55. The nut 53 is provided with a sleeve hole in the area outside the screw hole, that is, the nut 53 is sleeved on the first blocking part 21 through the sleeve hole. A second blocking part 22 is provided between the bottom of the first blocking part 21 and the base box. The second blocking part 22 and the top surface of the base box 4 form a cavity 23 for the second mounting plate 73 to move down through the clearance hole 41. The cavity 23 can reduce the height requirement of the base box 4 and leave enough height movement space for the caster assembly 6.
[0028] In this embodiment, the electric heating table also includes three limit switches, which control the motor 51 to stop when the middle layer 3 rises to its highest position, the initial position of the base, and the lowest position of the base. Preferably, the three limit switches can be located in the transmission structure between the motor 51 and the transmission rod 52 (i.e., inside the worm gear reducer), or they can be located along the height direction of the screw 55.
[0029] Working principle: During the lifting process of the middle layer 3, the motor 51 rotates forward, driving the nut 53 to rise. The nut 53 then drives the middle layer 3 to rise until it reaches its highest position, triggering the corresponding limit switch, at which point the motor 51 stops. During this process, the pressing part 57 moves away from the caster assembly 6 as the nut 53 rises. If the motor 51 rotates in the opposite direction, driving the nut 53 to descend, the nut 53 then drives the middle layer 3 to descend.
[0030] At the initial position of the base, the pressing part 57 abuts against the first mounting plate 71 of the caster assembly 6. When the motor 51 rotates in the opposite direction, driving the nut 53 to descend, the pressing part 57 presses down on the first mounting plate 71 as the nut 53 descends, causing the caster assembly 6 to move downwards as a whole. This raises the electric heating table relative to the caster assembly 6, meaning the lowest point of the caster 61 contacts the ground, and the bottom surface of the table legs 2 is suspended in the air, detached from the ground, until the nut 53 descends to its lowest position and triggers the corresponding limit switch. At this time, the caster assembly 6 supports the electric heating table, and the electric heating table moves via the casters 61 of the caster assembly 6. During this process, the middle layer 3 descends as the nut 53 descends.
[0031] The motor 51 rotates in the forward direction, causing the nut 53 to rise. The pressing part 57 maintains force on the first mounting plate 71 as the nut 53 rises. Under the weight of the electric heating table itself, the caster assembly 6 gradually moves upward. The pressing part 57 of the first mounting plate 71 passes through the clearance hole 41 and enters the cavity 23 until it rises to the initial position of the bottom foot. At this time, the pressing part 57 disengages from the first mounting plate 71, making the bottom surface of the caster assembly 6 flush with the bottom surface of the table leg 2, and the table leg 2 supports the electric heating table. During this process, the middle layer 3 rises along with the nut 53.
Claims
1. An electric heating table, comprising a tabletop, table legs, a middle layer, a base box, a lifting mechanism, and a caster assembly, wherein the tabletop is supported by the top of the table legs, and the base box is located at the bottom of the table legs, characterized in that, The lifting mechanism includes a motor, a transmission rod, a nut, a gearbox, and a screw. The gearbox is fixed inside the base box. Each table leg has a vertically arranged screw on its side. The bottom of the screw is connected to the gear set in the corresponding gearbox. The gear sets between gearboxes are synchronously connected via the transmission rod. The nut and the middle layer are integrated. The nut and the screw are threaded together. A first blocking part is provided on the side of the table leg. The screw is located between the side of the table leg and the first blocking part. The nut has a sleeve hole for the first blocking part to pass through. A pressing part extends downward from the bottom of the nut and fits onto the screw. A second blocking part is provided between the bottom of the first blocking part and the base box. The caster assembly includes a mounting frame and casters mounted at the bottom of the mounting frame. The mounting frame includes a first mounting plate, at least two support columns, and a second mounting plate. The gearbox has vertical guide holes, and the support columns pass through the corresponding guide holes. The first mounting plate is positioned above the gearbox, and the second mounting plate is positioned below the gearbox. The tops of the support columns are connected and fixed to the first mounting plate, and the bottoms of the support columns are connected and fixed to the second mounting plate. The casters are mounted on the bottom surface of the second mounting plate. The top surface of the base box has clearance holes, and a second blocking part blocks the clearance holes. The second blocking part and the top surface of the base box form a cavity for the second mounting plate to move up and down after passing through the clearance holes. The motor drives any transmission rod to rotate, which in turn drives the screw to rotate. The nut moves up or down as the screw rotates forward or in the opposite direction, and the nut drives the middle layer to move up or down. When the nut descends to the preset height, the pressing part abuts against the first mounting plate, and the nut continues to descend. The pressing part pushes the caster assembly to descend as a whole until the lowest point of the caster contacts the ground and the bottom of the table leg is suspended above the ground.
2. The electric heating table according to claim 1, characterized in that, The base box includes a base plate, a second mounting plate and casters on the bottom surface of the base plate, the base plate has mounting holes for the support columns to pass through, and the gearbox is fixed on the top surface of the base plate.
3. The electric heating table according to claim 2, characterized in that, When the lifting mechanism rises to the preset height, the pressing part moves away from the caster assembly and disengages from the first mounting plate. Under the action of gravity, the caster assembly rises as a whole until the bottom of the table leg contacts the ground.