Platform lifting mechanism

Abstract

The utility model discloses a platform lifting mechanism which comprises a platform plate, a support and a plurality of lifting stand columns, and the platform plate is installed on the support. At least one follow-up stand column used for supporting the bedplate which ascends to the highest position is arranged beside the lifting stand column. And when the bedplate ascends to the highest position, the coincidence distance between the inner steel pipe and the outer steel pipe of each follow-up stand column is larger than the coincidence distance between the inner steel pipe and the outer steel pipe of each lifting stand column. Therefore, a part of a driving structure does not need to be arranged on the follow-up stand column, the coincidence distance between the inner pipe and the outer pipe can be set to be maximum under the limited installation distance, namely the lifting of the platform lifting mechanism is driven by the lifting stand column, the follow-up stand column is responsible for rigid supporting, and the stability of the platform lifting mechanism is high.

Description

Technical Field

[0001] The utility model relates to the technical field of upgrading platforms, in particular to a platform lifting mechanism. Background Art

[0002] The podium pedal is generally located in front of the blackboard in the classroom to increase the height of the teacher, so that the teacher can be easily seen by students, so as to focus students' attention and improve the teaching quality. Usually the blackboard is fixed on the wall or stand of the classroom, and teachers of different subjects have different heights. Some teachers who are not tall enough find it difficult to write at the height of the blackboard, which makes it difficult to smoothly teach some courses that require large-scale writing to students. For this reason, a plurality of lifting columns are usually installed under the podium pedal. The lifting columns are fixed to the bracket under the table. The table is lifted synchronously and stably by the lifting columns, so that some teachers who are not tall enough can also write in the entire blackboard area, so that the course can proceed smoothly. In the existing conventional screw lifting column system, considering the space occupation of the axial dimensions of the drive structure (motor, reduction gear box and screw nut) and the remaining parts (anti-collision parts, welding dimensions), the lifting function of the column must be realized under the premise of meeting a minimum column installation distance, and the stability of the lifting column must also be considered. For a given stroke, the lower the minimum installation distance, the less the overlap distance between the inner and outer steel pipes at the highest position, and the worse the stability of the column. For example, for a two-section lifting column with a specified minimum installation distance of 180mm, when the stroke is 100mm, the overlap distance between the inner and outer steel pipes is low (less than 30mm) when it rises to the highest position. As a result, the stability of the lifting platform pedal equipped with only a few of these lifting columns is very poor, which needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a podium lifting mechanism with high stability.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a podium lifting mechanism, including a platform, a bracket and a plurality of lifting columns, the platform is fixedly mounted on the bracket; at least one follower column is provided next to the lifting column for supporting the platform raised to the highest position; and when the platform rises to the highest position, the overlapping distance of the inner and outer tubes of the follower column is greater than the overlapping distance of the inner and outer tubes of the lifting column.

[0005] Compared with the related art, the podium lifting mechanism of the present application has the following advantages: a follower column is added next to each lifting column, and the follower column is driven to rise and fall by the adjacent lifting column, so there is no need to set parts such as a driving structure on the follower column, and the overlapping distance of the inner and outer tubes can be set to the maximum within a limited installation distance, that is, the lifting and lowering of the podium lifting mechanism is driven by the lifting column, and the follower column is responsible for rigid support, so that the stability of the podium lifting mechanism is relatively high.

[0006] Preferably, the lifting columns are arranged at the four corners and two middle positions in the length direction. The length of the platform pedal is usually greater than twice the width, and there will be a downward force in the middle position. This position is usually close to the platform and is the position where the teacher is most likely to stand. If the lifting columns are not arranged in the middle position of the length, it is easy to cause the middle position to sink, which in turn causes the lifting columns at the four corners to deflect, affecting stability.

[0007] Preferably, a follower column is provided on each side of the lifting column arranged in the middle position in the length direction, so as to form a strong support for the middle position of the platform lifting mechanism and balance the two sides.

[0008] Preferably, the bracket includes four pairs of telescopic adjustment rods arranged laterally and arranged in two rows in a one-to-one manner; a plurality of longitudinally arranged shift rods are connected between the telescopic adjustment rods on the inner side; the two sides of the top of the lifting column on the corner and the two sides of the top of the adjacent follower column are respectively fixed to the outer ends of the adjacent telescopic adjustment rods, and the two sides of the top of the four middle follower columns are respectively fixed to the inner ends of the adjacent telescopic adjustment rods, and the inner sides of the tops of the follower columns are fixed to the tops of the adjacent lifting columns.

[0009] As an improvement, a plurality of longitudinal short rods are connected between the two telescopic adjustment rods of the same pair to enhance the stability of the edges on both sides of the bracket in the length direction.

[0010] As an improvement, two cross bars are connected between the two innermost gear bars to increase the support for the middle position of the table. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of a platform lifting mechanism of the present application (without platform).

[0012] Figure 2 for Figure 1 Enlarged schematic diagram of the circled part.

[0013] Description of reference numerals:

[0014] 2. Bracket, 21. Telescopic adjustment rod, 22. Connecting plate, 23. Shift rod, 3. Lifting column, 4. Follow-up column, 5. Pad. DETAILED DESCRIPTION

[0015] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0016] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] This preferred embodiment is for example Figure 1 The figure shows a platform lifting mechanism, including a platform (not shown), a bracket 2 and a plurality of lifting columns 3. The platform is fixed to the bracket 2. At least one follower column 4 is provided next to the lifting column 3 for supporting the platform when it rises to the highest position. The bottom end of the follower column 4 and the bottom end of the adjacent lifting column 3 are fixed on the same pad 5, and the top end of the follower column 4 is fixed to the bracket 2 and the top end of the adjacent lifting column 3. When the platform rises to the highest position, the overlap distance between the inner and outer tubes of the follower column is greater than the overlap distance between the inner and outer tubes of the lifting column.

[0018] In this embodiment, the lifting columns 3 are arranged at four corners and two middle positions in the length direction, that is, 6 lifting columns 3 are provided, and are arranged in 2 rows and 3 columns; the lifting columns 3 include a sleeved first inner tube and a first outer tube, a screw nut assembly, and a box body on which parts such as a motor and a reduction gear box are installed. The bottom end of the first inner tube is connected to the pad 5, the screw nut assembly is installed in the first inner and outer tubes, the bottom of the box body is fixed to the top of the first outer tube, the reduction gear box is transmission-connected to the top of the screw, and the side wall of the box body is fixed to the bracket 2.

[0019] In this embodiment, the bracket 2 includes four pairs of telescopic adjustment rods 21 arranged transversely and arranged in two rows in a one-to-one manner. The inner ends of the two telescopic adjustment rods 21 of the same pair are connected by a concave-shaped connecting plate 22. The inner ends of the telescopic adjustment rods 21 are connected to the inner sides of the wing plates on both sides of the connecting plate 22. The outer ends of the telescopic adjustment rods 21 are respectively fixed to the two sides of the box body of the lifting column 3 at the four corners. The two ends of the multiple gear rods 23 arranged longitudinally are respectively connected to the inner telescopic adjustment rods 21 of the two pairs of telescopic adjustment rods 21 arranged in parallel, and the table is fixed on the gear rods 23. Among them, the telescopic adjustment rod 21 is connected by two outer rods and an inner rod. The two outer rods are respectively sleeved on the two ends of the inner rod. The outer rod and the inner rod are provided with spaced bolt holes. The length of the telescopic adjustment rod 21 is adjusted by installing two bolts. As an improvement, multiple longitudinal short rods (not shown in the figure) can be connected between the two telescopic adjustment rods 21 of the same pair to strengthen the stability of the length edge of the bracket 2; two cross bars (not shown in the figure) can be connected between the two innermost gear rods 23 to increase support for the middle position of the table top, and the number of cross bars can be appropriately increased or decreased according to the width of the table top.

[0020] In this embodiment, the follower column 4 is composed of a sleeved second inner tube and a second outer tube, the bottom end of the second inner tube is fixed to the pad 5, the top ends of the second outer tube are respectively fixed to the ends of two adjacent telescopic adjustment rods 21, a clamping plate is provided between the top end of the second outer tube and the ends of the telescopic adjustment rods 21, the inner side of the top end of the second outer tube is fixed to the box body of the adjacent lifting column 3, and a clamping plate is also provided between the top end of the second outer tube and the box body of the adjacent lifting column 3. In addition, a longitudinal rod is connected between the top ends of the second outer tubes of the two follower columns 4 at the same end side in the length direction of the four corner follower columns 4.

[0021] As an improvement, two follower columns 4 are arranged on both sides of the lifting column 3 arranged at the middle position of the length, and the tops of the second outer tubes of the four follower columns 4 respectively pass through the corresponding connecting plates 22. Here, in order to balance the two sides, the box body of the lifting column 3 arranged at the middle position of the length is arranged longitudinally, and the inner ends of the telescopic adjustment rods 21 on both sides are connected to the lifting column 3 through the corresponding follower columns 4, that is, the bracket 2 and the six lifting columns 3, the eight follower columns 4 and the six pads 5 are connected to each other to form an integral and stable lifting mechanism.

[0022] Of course, the top of the second outer tube of the follower column 4 can also be directly fixed to the table. It can be understood that the top of the second outer tube of the follower column 4 needs to be fixed to at least one of the top of the lifting column 3, the table or the bracket 2.

[0023] The above-mentioned edge refers to an end in the width direction, the above-mentioned side refers to an end in the length direction, the above-mentioned transverse direction refers to the length direction of the table top, and the above-mentioned longitudinal direction refers to the width direction of the table top.

[0024] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A platform lifting mechanism, comprising a platform, a bracket and a plurality of lifting columns, wherein the platform is mounted on the bracket; characterized in that: At least one follower column is provided beside the lifting column for supporting the platform raised to the highest position; and when the platform rises to the highest position, the overlap distance of the inner and outer tubes of the follower column is greater than the overlap distance of the inner and outer tubes of the lifting column.

2. A platform lifting mechanism according to claim 1, characterized in that: The lifting columns are arranged at four corners and two middle positions in the length direction.

3. A platform lifting mechanism according to claim 2, characterized in that: A follower column is respectively provided on both sides of the lifting column arranged at the middle position in the length direction.

4. A platform lifting mechanism according to claim 3, characterized in that: The bracket includes four pairs of telescopic adjustment rods arranged laterally and arranged in two rows in a one-to-one manner; a plurality of longitudinally arranged shift rods are connected between the inner telescopic adjustment rods; the two sides of the top of the lifting column on the corner and the two sides of the top of the adjacent follower column are respectively fixed to the outer ends of the adjacent telescopic adjustment rods, and the two sides of the top of the middle four follower columns are respectively fixed to the inner ends of the adjacent telescopic adjustment rods, and the inner sides of the tops of the follower columns are fixed to the tops of the adjacent lifting columns.

5. The platform lifting mechanism according to claim 4, characterized in that: A plurality of longitudinal short rods are connected between the two telescopic adjustment rods of the same pair.

6. A platform lifting mechanism according to claim 4 or 5, characterized in that: Two cross bars are connected between the two innermost gear levers.

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