Electric lifting table
Through the design of the cross-hinged support arm drive of the motor assembly, the problem of excessive thickness of the existing electric lift table is solved, and a thinner electric lift table is realized. The oblique support arm and screw drive are used to achieve seamless switching and reduce the initial action load. , suitable for thinner and lighter aluminum alloy materials.
Patent Information
- Application Number
- CN202010009296.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-01-06
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2040-01-06
AI Technical Summary
The existing electric lifting tables have close to parallel at the lowest position, which is prone to jamming and requires a large traction force, resulting in too large thickness of the equipment and cannot achieve a thin and light design.
Design a motor assembly to lift the tabletop initially by the oblique support arm and continue to rise by driving the cross-hinged support arm, and drive the screw and motor components to achieve seamless switching, reduce initial stress and select a smaller power The motor and enables the support arm to use thinner and lighter aluminum alloy.
A thinner electric lifting table design is realized, with the maximum angle of the support arm close to 180 degrees. The tabletop can fit the base, making it lighter and thinner overall, and can effectively reduce the initial action load.
Smart Images
Figure CN113068920B_ABST
Abstract
Description
Technical field:
[0001] The invention belongs to the field of office furniture, and in particular relates to an electric lifting table, in particular a lifting table which can be superimposed on a fixed desktop or object to serve as a height-adjustable lifting table. Background technology:
[0002] With the advancement of technology, computers have taken over various fields and are indispensable even in leisure environments. Due to the various usage environments, in order to be compatible with different usage conditions and meet more humanized operation and observation angles, the industry has created many demands. For example:
[0003] Patent application No. 201720358005.0 discloses an electric noiseless desktop lifting device, including a supporting mechanism, the supporting mechanism including a base, and a bracket is respectively provided on both side ends of the rear part of the base, and a track is provided on the side end of the bracket; a bearing mechanism, the bearing mechanism including a desktop, and a motor switch is provided on the desktop; a movable mechanism, including a supporting group symmetrically arranged on the left and right, the supporting group is composed of a front oblique support rod and a rear oblique support rod, and the front oblique support rod and the rear oblique support rod are cross-movably connected to form an "X"-shaped structure, the bottom end of the rear oblique support rod slides in the track, a connecting rod is provided between the upper ends of the front oblique support rods arranged on the left and right, and an axle rod is provided between the upper ends of the rear oblique support rods arranged on the left and right; an electric drive mechanism, the electric drive mechanism is placed between the axle rod and the connecting rod, and the electric drive mechanism is connected to the motor switch. This structure utilizes a combination of a motor and a drive rod, that is, an electric push rod or a motor and a double-headed screw drive, to achieve the adjustment of the angle and height of the X-cross support rod. However, when the X-cross support rod is at the lowest position on the desktop, the front and rear support rods are close to parallel, which is not only easy to get stuck, but also requires a large traction force. Therefore, the two support rods are kept at a certain initial angle during design, which also makes it impossible to make the lifting table thin.
[0004] Another example: Patent application number 201821378743.2, is based on the same principle, except that the movement direction of the cross-type lifting arm is different. The former moves in the front-to-back direction, while the latter moves in the left-to-right direction. Other aspects are similar, and there is also the defect of being too thick.
[0005] How to improve the existing defects has become the research direction of the present invention. Summary of the invention:
[0006] The purpose of the present invention is to design a driving stroke of a motor assembly to drive two sets of mechanisms to switch seamlessly, initially the diagonal support arm lifts the desktop, and then switches to drive the two cross support arms to continue to raise the electric lifting table.
[0007] The technical solution of the present invention is implemented as follows: an electric lifting table comprises a base, a desktop, two cross-hinged support arms and a motor assembly; the desktop is supported on the base by the two support arms, one end of the two support arms is a fixed end, which is correspondingly hinged on the base and the desktop, and the other end is a movable end, which is slidably positioned in the corresponding long slide grooves of the base and the desktop, and the motor assembly comprises a motor assembly and a screw driven to rotate by the motor assembly, the ends of the motor assembly and the screw are correspondingly connected to the fixed end and the movable end of the support arm, and the motor assembly drives the lifting action of the desktop; it is characterized in that: the two ends of the screw are positioned in the short slide groove of the desktop or the base through a transverse axis, an oblique support arm is positioned on the transverse axis, and the lower end of the oblique support arm can abut against a stopper set on the base or the desktop; a nut seat with a traction arm is screwed on the screw, and the traction arm is connected to the movable end of the support arm.
[0008] The motor assembly is locked on a desktop or a base, and the output shaft of the motor assembly is axially connected to the screw rod through a spline sleeve, allowing the screw rod to move axially while transmitting power.
[0009] The base is a rectangular frame, with long slide grooves on the front and rear frames, and blocks on the left and right sides; the desktop is a flat structure, the motor assembly is installed on the back of the desktop, and the long slide groove and the short slide groove are locked on the back of the desktop; a key area for controlling the motor assembly is set on the front of the desktop, and the desktop can cover the frame of the base.
[0010] A pair of cross-hinged support arms are respectively arranged on the front and rear sides of the table top and the base, and the two pairs of support arms move synchronously. The downward movable ends of the two support arms are connected by a long axis, and the two ends of the long axis are respectively pivoted in the long slide grooves of the base; the upward movable ends of the two support arms are pivoted in a pair of long slide grooves locked on the back of the table top through their respective short axes, and a traction arm is also pivoted on the short axis.
[0011] The motor assembly is arranged at the center position between the front and back of the desktop, and a pair of short slide grooves and a pair of diagonal support arms are respectively arranged on both sides of the two ends of the screw, and the two ends of the transverse axis are pivoted in the two short slide grooves, and the two ends of the screw respectively pass through the corresponding center holes of the transverse axis, the two are cross-intersected and constrain the movement of the transverse axis along the axial direction of the screw; a pair of short slide grooves are also arranged on both sides of one end of the motor assembly, and a transverse axis is pivoted thereto, and a linkage plate is arranged between the transverse axis on the short slide groove and the transverse axis at the end of the screw, so that the two transverse axes at the same end are synchronized, and diagonal support arms are pivoted on the transverse axes on both sides of the motor assembly; a pair of diagonal support arms away from one end of the motor assembly are directly pivoted on the transverse axis and are on both sides of the screw, and the desktop is jointly lifted by four diagonal support arms on the left and right sides.
[0012] The front and rear frames of the base are formed by cutting off the profile, and the left and right ends are plastic parts, which are fixed to the two ends of the frames by screws to form the base as a whole.
[0013] The present invention cleverly utilizes a driving stroke, initially the diagonal support arm lifts the desktop, and makes the crossing angle of the two cross-hinged support arms smaller. After the driving torque becomes larger, it can freely switch to drive the two cross support arms to continue to rise, which not only reduces the force on the support arms in the initial stage, but also allows the selection of a smaller power motor; therefore, the support arms can use thinner and lighter aluminum alloys, and the maximum angle of the two cross support arms can be close to 180 degrees during design, so that the desktop can fit on the base, and the overall appearance is lighter and thinner after folding. Description of the drawings:
[0014] The present invention will be further described below in conjunction with specific illustrations:
[0015] Figure 1 Schematic diagram of the electric lifting table after folding
[0016] Figure 2 Schematic diagram of the electric lift table after it is raised
[0017] Figure 3 Diagram of raising the elevation angle of the electric lifting table
[0018] Figure 4 Schematic diagram of electric lifting table
[0019] in
[0020] 1-desktop 11-button area 2-base 21-frame
[0021] 22—Plastic part 23—Hinged seat 24—Block 3—Support arm
[0022] 31 - long shaft 32 - short shaft 4 - motor assembly 41 - motor assembly
[0023] 411 - output shaft 42 - screw rod 43 - nut seat 44 - horizontal axis
[0024] 441—center hole 45—traction arm 46—linkage plate 5—long slide groove
[0025] 6—Short chute 7—Diagonal brace arm Specific implementation method:
[0026] Reference Figures 1 to 4 The electric lifting table includes a desktop 1, a base 2, a support arm 3 and a motor assembly 4; the desktop 1 is supported on the base 2 by two pairs of cross-hinged support arms 3, one end of the two cross-support arms 3 is a fixed end, which is correspondingly hinged on the base 2 and the desktop 1, and the other end is a movable end, which is slidably positioned in the corresponding long slide grooves 5 of the base 2 and the desktop 1. The support arm 3 adjusts the height of the desktop 1 by changing the position of the movable end in the long slide groove 5.
[0027] The base 2 is a rectangular frame, and the front and rear frames 21 are formed by cutting the profile. The left and right ends are plastic parts 22, which are screwed to the two ends of the frames 21 to form the base 2 as a whole. The long slide grooves 5 on the front and rear frames 21 of the base are directly formed when the profile is stretched. When the plastic parts 22 are used for production, the hinge seat 23 at the fixed end of the support arm and the stoppers 24 on the left and right sides are formed.
[0028] The desktop 1 is a planar structure, the motor assembly 4 is installed on the back of the desktop, and a long slide groove 5 and a short slide groove 6 are locked on the back of the desktop. A button area 11 for controlling the motor assembly is provided on the front of the desktop 1. The desktop 1 can cover the frame 21 of the base to form a whole.
[0029] More specifically, a pair of cross-hinged support arms 3 are respectively provided on the front and rear sides of the table top 1 and the base 2. The two pairs of support arms move synchronously. The downward movable ends of the two support arms 3 are connected by a long axis 31, and the two ends of the long axis 31 are respectively pivoted in the long slide groove 5 of the base; the upward movable ends of the two support arms 3 are pivoted in a pair of long slide grooves 5 locked on the back of the table top through their respective short axes 32, and a traction arm 45 is also pivoted on the short axis 32 to pull the movable ends of the support arms 3.
[0030] The motor assembly 4 includes a motor component 41, a screw 42 and a nut seat 43; the motor component 41 is preferably a stepping motor, and a combination of an ordinary motor and a gearbox can also be used; the motor component drives the screw 42 to rotate, and the ends of the motor component 41 and the screw 42 are correspondingly connected to the fixed end and the movable end of the support arm 3, driving the change of the angle between the two cross-hinged support arms 3 to achieve the lifting and lowering adjustment of the desktop 1. The motor component 41 is locked on the desktop 1, and the output shaft 411 of the motor component is connected to the screw 42 through a spline sleeve, which allows the screw 42 to move axially while transmitting power.
[0031] The two ends of the screw rod 42 are positioned in the short slide groove 6 on the back of the table top 1 through the horizontal axis 44, and an inclined support arm 7 is also positioned on the horizontal axis 44, and the lower end of the inclined support arm 7 can abut against the stopper 24 set on the base 2; the nut seat 43 is screwed on the screw rod 42 and fixed with the traction arm 45, and connected with the movable end of the support arm 3 through the traction arm 45.
[0032] The lifting process of the desktop is also a process in which the driving torque and the gravity torque change. At the initial lifting of the desktop 1, the driving torque is small and the gravity torque is large. For a motor with constant power, the initial action load is large. Therefore, the initial lifting action is a difficulty in driving this type of cross support arm. The motor assembly 41 drives the screw 42 to rotate, and the nut seat 43 is stressed. At this time, since the angle between the two crossed support arms 3 is close to 180 degrees, the axial driving force of the screw 42 is close to parallel with the support arm 3, the driving torque is small, and the movable end of the support arm 3 does not move. The reaction force forces the screw 42 to move axially, driving the horizontal axis 44 at both ends to move along the short slide 6; and the lower end of the diagonal support arm 7 positioned on the horizontal axis is supported by the block 24, and the initial torque of the diagonal support arm 7 is large. After being stressed, it flips with the lower end as the fulcrum to lift the desktop 1 together with the motor assembly 4; when the horizontal axis 44 moves to the end of the short slide 6 and the screw 42 cannot move, the driving force is fully applied to the nut seat 43. At this time, since the desktop 1 is lifted to a certain height, the angle between the two crossed support arms 3 becomes smaller, and the torque increases, which can easily pull the movable end of the support arm 3 toward the fixed end, and the desktop is gradually lifted to the required height. The free switching between the diagonal support arm 7 and the support arm 3 is one of the greatest features of this structure.
[0033] Furthermore, the motor assembly 4 is arranged at the center between the front and rear of the desktop, and a pair of short slide grooves 6 and a pair of diagonal bracing arms 7 are arranged on both sides of the two ends of the screw rod 42, and the two ends of the transverse shaft 44 are pivotally connected in the two short slide grooves 6, and the two ends of the screw rod 42 respectively pass through the corresponding transverse shaft center holes 441, and the two cross and restrict the transverse shaft 44 from moving along the axial direction of the screw rod, that is, the transverse shaft 44 allows the screw rod 42 to rotate freely, while the transverse shaft itself cannot move along the axial direction of the screw rod; on both sides of one end of the motor assembly 41, there are also A pair of short slides 6 are provided and are pivotally connected with a transverse axis 44. A linkage plate 46 is provided between the transverse axis on the short slide and the transverse axis 44 at the end of the screw rod 41 to synchronize the two transverse axes 44 at the same end, and diagonal support arms 7 are pivotally connected to the transverse axes on both sides of the motor assembly 41; a pair of diagonal support arms 7 at one end away from the motor assembly are directly pivotally connected to the transverse axis 44 and are located on both sides of the screw rod 42. The four diagonal support arms 7 on the left and right sides jointly support the table top 1, so that it can be said that it can have stable support even in the initial state.
[0034] Through this structure, a pair of diagonal bracing arms 7 are moved to one side of the desktop to avoid being too centered and causing trouble for the setting of the stopper on the base. In this way, a larger hollow space can be formed in the middle of the base 2 after avoiding the problem.
[0035] In addition, the desktop 1 and the base 2 are two corresponding surfaces. In this example, the motor assembly 4 is locked on the back of the desktop. Since the desktop is a complete plane, it can form a necessary shield. Of course, it can also be interchanged with the base 2, and the motor assembly 4 is designed on one side of the base. In addition to being beautiful, the effect is the same. The above-mentioned diagonal brace arm 7 is just a graphic illustration of its initial angle with the force direction. In addition to the figure, it can also be a wedge block, an arc arm, or a rectangular block with the force application point and the force point on the diagonal line.
Claims
1. An electric lifting table, comprising a base (2), a tabletop (1), two cross-hinged support arms (3) and a motor assembly (4); the tabletop (1) is supported on the base (2) by the two support arms (3), one end of the two support arms (3) is a fixed end, which is correspondingly hinged on the base (2) and the tabletop (1), and the other end is a movable end, which is slidably positioned in corresponding long slide grooves (5) of the base (2) and the tabletop (1), the motor assembly (4) comprises a motor assembly (41) and a screw (42) driven to rotate by the motor assembly (41), the end of the motor assembly (41) is connected to the fixed end of one support arm (3), and the end of the screw (42) is connected to the movable end of the other support arm (3), and the lifting action of the tabletop (1) is driven by the motor assembly (4); the characteristics are: The two ends of the screw rod (42) are positioned in the short slide groove (6) of the table top (1) or the base (2) through a transverse axis (44); an oblique support arm (7) is positioned on the transverse axis (44); the lower end of the oblique support arm (7) can abut against a stopper (24) provided on the base (2) or the table top (1); a nut seat (43) with a traction arm is screwed on the screw rod (42); the traction arm (45) is connected to the movable end of the support arm (3).
2. The electric lifting table according to claim 1, characterized in that: The motor assembly (41) is locked on the tabletop (1) or the base (2), and the output shaft (411) of the motor assembly is axially connected to the screw rod (42) via a spline sleeve, allowing the screw rod (42) to move axially while transmitting power.
3. The electric lifting table according to claim 1 or 2, characterized in that: The base (2) is a rectangular frame, and long slide grooves (5) are arranged on the front and rear frames (21), and blocks (24) are arranged on the left and right sides; the desktop (1) is a flat structure, the motor assembly (4) is installed on the back of the desktop (1), and the long slide groove (5) and the short slide groove (6) are locked on the back of the desktop (1); a key area (11) for controlling the motor assembly (4) is arranged on the front of the desktop (1), and the desktop (1) can cover the frame (21) of the base.
4. The electric lifting table according to claim 3, characterized in that: A pair of cross-hinged support arms (3) are respectively arranged on the front and rear sides of the table top (1) and the base (2). The two pairs of support arms (3) are in synchronous motion. The downward movable ends of the two support arms (3) are connected by a long axis (31), and the two ends of the long axis (31) are respectively pivoted in the long slide grooves (5) of the base (2); the upward movable ends of the two support arms (3) are pivoted in a pair of long slide grooves (5) locked on the back of the table top (1) through their respective short axes (32), and the short axes (32) are also pivoted with a traction arm (45).
5. The electric lifting table according to claim 3, characterized in that: The motor assembly (4) is arranged at a central position between the front and rear of the desktop (1), and a pair of short slide grooves (6) and a pair of diagonal bracing arms (7) are arranged on both sides of the two ends of the screw rod (42), and the two ends of the transverse shaft (44) are pivotally connected in the two short slide grooves (6). The two ends of the screw rod (42) respectively pass through the corresponding center holes of the transverse shaft (44), and the two cross each other and restrict the transverse shaft (44) from moving along the axial direction of the screw rod (42); a pair of short slide grooves (6) are also arranged on both sides of one end of the motor assembly (41), and are pivotally connected. A cross shaft (44) is provided, and a linkage plate (46) is provided between the cross shaft (44) on the short slide groove (6) and the cross shaft (44) at the end of the screw rod (42), so that the two cross shafts (44) at the same end are synchronized, and diagonal bracing arms (7) are pivotally connected to the cross shaft (44) on both sides of the motor assembly (41); a pair of diagonal bracing arms (7) at one end away from the motor assembly (41) are directly pivotally connected to the cross shaft (44) and are located on both sides of the screw rod (42), and the four diagonal bracing arms (7) on the left and right sides jointly support the table top (1).
6. The electric lifting table according to claim 3, characterized in that: The front and rear frames (21) of the base (2) are formed by cutting off the profile, and the left and right ends are plastic parts (22) which are screwed to the two ends of the frames (21) to form the base (2) as a whole.