A rigid transmission column device

Abstract

This application discloses a rigid transmission column device to solve the problems of existing transmission devices requiring guide devices and deep pits, and having complex structures. This application includes: a rigid transmission box, with a first storage box and a second storage box respectively arranged on the left and right sides of the transmission box. A first column chain and a second column chain are respectively arranged inside the first and second storage boxes. The transmission box is connected to the first and second column chains, respectively, so that the first and second column chains are connected vertically to form a transmission column. A pressure roller assembly is arranged on the outside of the transmission box to improve the rigidity and stability of the transmission column. This application has a simple and compact structure, is easy to use, saves time and effort, has high transmission efficiency, a large stroke, and a shallow pit. The arrangement of the first and second column chains allows the transmission column to be subjected to bidirectional force during operation, eliminating the need for additional guide devices during lifting and lowering.

Description

Technical Field

[0001] This application relates to the field of transmission column technology, specifically to a rigid transmission column device. Background Technology

[0002] Transmission devices are needed in many industries, such as automated production lines, stage machinery equipment, logistics and warehousing, pharmaceuticals and healthcare, and military industry, to achieve lifting and lowering operations.

[0003] Currently available transmission devices on the market, including the first type (such as rigid chains, flexible columns, flexible teeth, and screw rods), are unidirectional rigid structures. They cannot withstand horizontal loads in any direction during lifting, and can only transmit forces in the vertical direction. They require guiding devices (such as scissor braces or elevator rails) to function, and their overall structure is relatively complex. The second type, rack and pinion lifting transmission, has the following disadvantages: 1. The meshing angle of the rack and pinion creates a horizontal component force during transmission, negatively impacting the control center distance; 2. The rack and pinion lifting transmission requires a certain length for its stroke, necessitating sufficient vertical space; 3. The installation of the rack and pinion motion... High precision requirements; 4. When the gear and rack switch between forward and reverse operation, the tooth surface is subjected to bidirectional force, and the tooth backlash generates idle stroke, which easily causes vibration and affects the transmission effect; The third type of transmission device, the lead screw and nut lifting transmission, has the following disadvantages: 1. The length of the lead screw and nut lifting transmission is equal to the length of the lead screw, requiring sufficient vertical space; 2. Low transmission efficiency; 3. The lead nut wears quickly, and the workload of regularly replacing the lead nut is large; 4. High noise; The fourth type of transmission device, the wire rope lifting transmission, has the following disadvantages: 1. The wire rope is elastic, and the positioning accuracy is inaccurate; 2. The wire rope is a wear part and must be replaced after wear; 3. Maintenance is relatively troublesome, and the wear degree needs to be checked frequently, otherwise the rope breakage will cause an accident.

[0004] Traditional transmission devices generally require deep foundation pits, occupy a large space, and have high maintenance costs. In addition, some places are limited by space, which prevents the installation of guiding devices and makes it impossible to choose traditional transmission methods. Summary of the Invention

[0005] Therefore, this application provides a rigid transmission column device to solve the problem that the transmission device in the prior art needs to be equipped with a guide device and a deep foundation pit, and has a complex structure.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A rigid transmission column device includes: a rigid transmission box supported by a support frame; a first storage box and a second storage box respectively disposed on the left and right sides of the transmission box, wherein a first column chain and a second column chain are respectively disposed in the first storage box and the second storage box; the transmission box is connected to the first column chain and the second column chain respectively, such that the first column chain and the second column chain are connected in the vertical direction to form a transmission column; a lifting mechanism is disposed at the top of the transmission column; and four pressure roller assemblies are disposed on the outside of the transmission box to improve the rigidity and stability of the transmission column.

[0008] Optionally, the left and right sides of the transmission box are respectively provided with a first track for lifting the first column chain and a second track for lifting the second column chain;

[0009] The first storage box and the second storage box are respectively provided with a third track and a fourth track. The third track is connected to the bottom of the first track, and the fourth track is connected to the bottom of the second track.

[0010] The turn where the first track and the third track connect is called the first turn, and the turn where the second track and the fourth track connect is called the second turn. There is a height difference between the first turn and the second turn.

[0011] Optionally, the height of the first turn is 20-40mm higher than the height of the second turn.

[0012] Optionally, the first link chain includes a plurality of first link units connected in sequence, and the second link chain includes a plurality of second link units connected in sequence;

[0013] The first column unit includes a first bearing shaft, a plurality of first bushings are spaced apart on the first bearing shaft, a first chain link is provided between adjacent first bushings, and two first guide rollers are provided at both ends of the first bearing shaft;

[0014] The second column unit includes a second bearing shaft, a plurality of second bushings are spaced apart on the first bearing shaft, a second chain is provided between adjacent first bushings, and two second guide rollers are provided at both ends of the first bearing shaft.

[0015] Optionally, both the first and second chain segments are L-shaped structures;

[0016] The first chain link is divided into a first inner chain plate and a first outer chain plate, with the first inner chain plate sleeved on the outside of the first bearing shaft; the second chain link is divided into a second inner chain plate and a second outer chain plate, with the second inner chain plate sleeved on the outside of the second bearing shaft.

[0017] Optionally, the angle formed by the L-shaped structure is in the range of 70-80°.

[0018] Optionally, a drive wheel is provided inside the transmission box, and a reduction motor is provided on the outside. The drive wheel is connected to the first column chain. The reduction motor drives the drive wheel to rotate, thereby driving the first column chain to rise and fall. The first column chain and the second column chain mesh with each other to achieve the lifting action.

[0019] Optionally, the support frame includes four legs, which are symmetrically arranged in pairs around the outside of the transmission box, and the four legs are connected to the outside of the transmission box by four connecting rods.

[0020] Optionally, there are four sets of pressure roller assemblies, which are symmetrically arranged in pairs on the front and rear sides of the transmission box.

[0021] Optionally, the pressure roller assembly includes a pressure roller and a pressure roller shaft connecting the pressure roller. Two fixing plates are provided on both sides of the pressure roller, and the two fixing plates are connected to the pressure roller shaft. The fixing plates are fixedly connected to the transmission box.

[0022] Compared with the prior art, this application has at least the following beneficial effects:

[0023] 1. This application provides a rigid transmission column device, comprising: a rigid transmission box, with a first storage box and a second storage box respectively disposed on the left and right sides of the transmission box, and a first column chain and a second column chain respectively disposed inside the first and second storage boxes, the transmission box being drivenly connected to the first column chain and the second column chain respectively, such that the first column chain and the second column chain are connected in the vertical direction to form a transmission column, and a lifting mechanism is disposed at the top of the transmission column; a pressure roller assembly is disposed on the outside of the transmission box; this application has a simple and compact structure, is easy to use, saves time and effort, has high transmission efficiency, and good stability during operation. With a long stroke, it is suitable for heavy load applications; the pit is shallow, requiring only the height of the equipment. It boasts high repeatability, minimal installation requirements, simple maintenance, and low maintenance costs. The first and second column chain configurations allow the rigid transmission column to withstand horizontal forces, bidirectional push and pull loads, and bidirectional force application, eliminating the need for additional guide devices during lifting. The pressure roller assembly ensures that all four sets of pressure rollers contact the transmission column evenly, guiding and controlling its forward and backward movement, improving its bending resistance, and further enhancing the overall structural rigidity and stability.

[0024] 2. This application has a height difference between the first turn and the second turn in terms of horizontal height. The setting of this height difference allows the first link chain and the second link chain to participate in the meshing process at different phases (angles), making the meshing smoother and less stiff, effectively reducing noise, and avoiding vibration and jamming.

[0025] 3. In this application, both the first and second chain links are L-shaped structures, with the angle of the L-shaped structure ranging from 70 to 80°. By improving and optimizing the shape and size of the first and second link units, the optimal angle is found to make the engagement and disengagement process of the first and second link chains smoother, the engagement angle tighter and gapless, and the disengagement angle smoother, thereby improving the transmission column's ability to resist horizontal lateral forces.

[0026] 4. This application provides a first track for lifting the first column chain on the left side of the transmission box and a second track for lifting the second column chain on the right side. Through the cooperation of the pressure roller assembly, drive wheel, first track and second track, the transmission column is controlled in both the horizontal front-back and left-right directions, realizing the precision transmission process of the lifting mechanism. Attached Figure Description

[0027] To more intuitively illustrate the prior art and this application, several exemplary figures are provided below. It should be understood that the specific shapes and structures shown in the figures should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary figures, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0028] Figure 1 A structural illustration provided for one embodiment of this application Figure 1 ;

[0029] Figure 2 A structural illustration provided for one embodiment of this application Figure 2 ;

[0030] Figure 3 A structural illustration provided for one embodiment of this application Figure 3 (side);

[0031] Figure 4 for Figure 1 The sectional view shown;

[0032] Figure 5 for Figure 4 The front view shown;

[0033] Figure 6 for Figure 1 The side sectional view shown;

[0034] Figure 7 for Figure 1 The diagram shows the structure at the transmission column. Figure 1 and structural diagram Figure 2 ;

[0035] Figure 8 for Figure 7 Side view of the first column unit and side view of the second column unit;

[0036] Figure 9 for Figure 7 Front and side views of the first column unit;

[0037] Figure 10 for Figure 7 Front and side views of the second column unit;

[0038] Figure 11 for Figure 1 Schematic diagram of the intermediate pressure wheel assembly Figure 1 and structural diagram Figure 2 ;

[0039] Figure 12 for Figure 4 A schematic diagram of the structure at the drive wheel.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Transmission box; 11. Drive wheel; 12. Input shaft;

[0042] 2. First storage box; 21. Third track; 3. First column chain; 31. First column unit; 32. First bearing shaft; 33. First chain link; 331. First inner chain plate; 332. First outer chain plate; 34. First bushing; 35. First guide roller;

[0043] 4. Second storage box; 41. Fourth track; 5. Second column chain; 51. Second column unit; 52. Second bearing shaft; 53. Second chain link; 531. Second inner chain plate; 532. Second outer chain plate; 54. Second bushing; 55. Second guide roller;

[0044] 6. Transmission column; 7. Support frame; 71. Outrigger; 72. Connecting rod; 73. Connecting plate; 8. Lifting mechanism; 9. Pressure roller assembly; 91. Pressure roller; 92. Pressure roller shaft; 93. Fixing plate; 931. First vertical plate; 932. Second vertical plate; 9321. Mounting hole; 94. Bolt. Detailed Implementation

[0045] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0047] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0048] One embodiment of this application provides a rigid transmission column device, such as... Figures 1-6 As shown, it includes: a rigid transmission box 1, which is supported by a support frame 7; a first storage box 2 and a second storage box 4 are symmetrically arranged on the left and right sides of the transmission box 1, respectively; a first column chain 3 and a second column chain 5 are respectively arranged inside the first storage box 2 and the second storage box 4; the transmission box 1 is connected to the first column chain 3 and the second column chain 5 respectively, and the first column chain 3 and the second column chain 5 are connected in the vertical direction to form a transmission column 6; a lifting mechanism 8 is provided at the top of the transmission column 6, which can be a lifting platform; when the transmission column 6 is working, it lifts the lifting mechanism 8 to realize the lifting of the lifting mechanism 8.

[0049] like Figure 1 , Figure 2 and Figure 11 As shown, four sets of pressure roller assemblies 9 are also configured on the outside of the transmission box 1. The four sets of pressure roller assemblies 9 are symmetrically arranged in pairs on the front and rear sides of the transmission box 1, and the two sets of pressure roller assemblies 9 on the same side are located on the upper and lower parts of the transmission box 1, respectively. The pressure roller assembly 9 includes a pressure roller 91 and a pressure roller shaft 92 connecting the pressure roller 91. Two fixing plates 93 are provided on both sides of the pressure roller 91. The two fixing plates 93 are connected to the pressure roller shaft 92, and the fixing plates 93 are fixed to the outside of the transmission box 1 by bolts 94. The pressure roller 91 is partially located inside the transmission box 1.

[0050] In this embodiment, as Figure 4 , Figure 12As shown, a drive wheel 11 is provided inside the transmission box 1, and a geared motor is provided on the outside. The geared motor is connected to the input shaft 12 of the transmission column 6. The input shaft 12 is equipped with a multi-row toothed drive wheel 11, which is connected to the first column chain 3. The hollow shaft of the geared motor is sleeved on the input shaft 12 of the transmission column 6, realizing the connection between the geared motor and the transmission column 6. The geared motor drives the drive wheel 11 to rotate, which drives the first column chain 3 to rise and fall. The first column chain 3 and the second column chain 5 mesh with each other to realize the lifting and falling action. The geared motor includes a reducer and a motor. The reducer is used to reduce the speed of the motor to a suitable value before driving.

[0051] like Figure 2 , Figure 3 As shown, the support frame 7 includes four legs 71, which are symmetrically arranged in pairs around the outside of the transmission box 1. The upper parts of the four legs 71 are connected to the outside of the transmission box 1 through four connecting rods 72. The bottom of the legs 71 is connected to the connecting plate 73, which is fixed to the ground.

[0052] Preferably, such as Figure 12 As shown, the fixing plate 93 has an L-shaped structure, including a first vertical plate 931 and a second vertical plate 932. The two first vertical plates 931 are located inside the transmission box 1 and abut against the two sides of the pressure roller 91 respectively, and the pressure roller shaft 92 of the pressure roller 91 passes through the first vertical plate 931. The two second vertical plates 932 located on the outside have mounting holes 9321 and are fixed to the outside of the transmission box 1 by bolts 94, thereby achieving reliable fixing of the pressure roller 91.

[0053] Two pairs of pressure rollers 91 located on the front and rear sides of the transmission box 1 guide and control the transmission column 6 in the front-to-back (Y-axis) direction, eliminating the gap in the transmission column 6 (Y-axis) direction caused by the tooth width of the drive wheel 11 being smaller than the spacing between the first chain links 33 after meshing, resulting in better meshing effect; ensuring that the four sets of pressure roller assemblies 9 can evenly contact the transmission column 6 (or the first column segment unit 31 and the second column segment unit 51), improving the bending resistance of the transmission column 6, and further improving the rigidity and stability of the overall structure. In addition, the pressure roller shaft 92 is an eccentric shaft with an eccentricity of 2mm, which can be adjusted within the range of 0-2mm to eliminate gap errors caused by machining errors, etc.

[0054] Preferably, such as Figure 5 , Figure 6As shown, the transmission box 1 has a first track on the left side for lifting the first link chain 3 and a second track on the right side for lifting the second link chain 5; the first storage box 2 and the second storage box 4 are respectively provided with a third track 21 and a fourth track 41, the third track 21 is connected to the bottom of the first track and the fourth track 41 is connected to the bottom of the second track; when the first link chain 3 and the second link chain 5 are multi-layered, the third track 21 is a bent track in the first storage box 2 and the fourth track 41 is a bent track in the second storage box 4;

[0055] The turning point where the first track and the third track 21 connect is called the first turning point, and the turning point where the second track and the fourth track 41 connect is called the second turning point. There is a height difference between the first turning point and the second turning point in terms of horizontal level.

[0056] The first and second tracks guide and control the transmission column 6 in the left and right (X-axis) directions, respectively, so that the first column chain 3 and the second column chain 5 can closely cooperate in the X-axis direction to form the transmission column 6. The meshing effect is good, which improves the rigidity of the transmission column 6 and further improves the rigidity and stability of the overall structure. Through the cooperation of the pressure roller assembly 9, the drive wheel 11, the first track and the second track, the transmission column 6 is controlled in the horizontal front-back and left-right directions, realizing the precision transmission process of the lifting mechanism 8.

[0057] Preferably, the height of the first turn is 20-40mm higher than the height of the second turn, so that the first link chain 3 and the second link chain 5 engage in meshing at different phases, making the meshing process smoother, effectively reducing noise, and avoiding jamming. Practical testing has shown that when the height difference is 30mm, the noise reduction effect of meshing and disengaging the first link chain 3 and the second link chain 5 is the best, and the noise can be reduced by more than 70%.

[0058] Preferably, such as Figures 5-10 As shown, the first column chain 3 includes multiple first column units 31 connected in sequence, and the second column chain 5 includes multiple second column units 51 connected in sequence; the first column unit 31 in the first storage box 2 and the second column unit 51 in the second storage box 4 are divided into one or more layers, and the specific number of layers can be adjusted according to the actual situation, which can be 1-6 layers.

[0059] The first column unit 31 includes a first bearing shaft 32, a plurality of first chain links 33 and a plurality of first bushings 34. The plurality of first bushings 34 are spaced apart on the first bearing shaft 32, and the plurality of first chain links 33 are spaced apart between two adjacent first bushings 34. The plurality of first chain links 33 and the plurality of first bushings 34 are staggered. Two first guide rollers 35 are provided at both ends of the first bearing shaft 32, and the two first guide rollers 35 are located outside the two outermost first chain links 33.

[0060] The second column unit 51 includes a second bearing shaft 52, a plurality of second chain links 53 and a plurality of second bushings 54. The plurality of second bushings 54 are spaced apart on the second bearing shaft 52, and the plurality of second chain links 53 are spaced apart between two adjacent second bushings 54. The plurality of second chain links 53 and the plurality of second bushings 54 are staggered. Two second guide rollers 55 are provided at both ends of the second bearing shaft 52, and the two second guide rollers 55 are located outside the two outermost second chain links 53.

[0061] The number of first bushings 34 is one less than the number of first chain links 33. Optimally, there are 3 first bushings 34 and 4 first chain links 33, corresponding to 3 drive wheels 11 located at the lower part of the first bushings 34. Similarly, the number of second bushings 54 is one less than the number of second chain links 53. Optimally, there are 3 second bushings 54 and 4 second chain links 53.

[0062] More preferably, the first chain piece 33 and the second chain piece 53 have the same structure, both being L-shaped, and the directions of the first chain piece 33 and the second chain piece 53 are opposite;

[0063] like Figure 9 As shown, the first chain plate 33 is divided into a first inner chain plate 331 and a first outer chain plate 332. The first inner chain plate 331 has two first shaft holes along the longitudinal direction. The two first shaft holes are respectively sleeved on the outer side of two adjacent first bearing shafts 32.

[0064] The second chain plate 53 is divided into a second inner chain plate 531 and a second outer chain plate 532. The second inner chain plate 531 has two second shaft holes along the longitudinal direction. The two second shaft holes are respectively sleeved on the outer side of two adjacent second bearing shafts 52.

[0065] During operation, the first inner chain plate 331 engages with the second inner chain plate 531, and the first outer chain plate 332 engages with the second outer chain plate 532, thereby achieving mutual engagement between the first column chain 3 and the second column chain 5.

[0066] More preferably, the angle range of the L-shaped structure is 70-80°. Practical testing has shown that within this angle range, the engagement and disengagement of the first link chain 3 and the second link chain 5 are smoother, resulting in higher lifting efficiency. Furthermore, the increased overlap area between the first inner chain plate 331 and the second outer chain plate 532 enhances the transmission column 6's ability to resist horizontal lateral forces.

[0067] The working principle of the above embodiment is as follows: When the lifting mechanism 8 needs to rise, the transmission box 1 is started, and the geared motor rotates forward, driving the drive wheel 11 to rotate forward, so that the first column chain 3 and the second column chain 5 mesh with each other, forming a rigid transmission column 6 in the vertical direction. The transmission column 6 rises, driving the lifting mechanism 8 at its top to complete the rising process; when the lifting mechanism 8 needs to descend, the geared motor reverses, driving the drive wheel 11 to rotate in the opposite direction, so that the transmission column 6 moves downward and separates into the first column chain 3 and the second column chain 5 in the horizontal direction, thereby completing the descending process of the lifting mechanism 8.

[0068] This application features a simple and compact structure, ease of use, time and labor saving, high transmission efficiency, good operational stability, and a large stroke, making it suitable for heavy load applications. It requires only a shallow pit, the size of the equipment itself. It boasts high repeatability, minimal installation requirements, simple maintenance, and low maintenance costs. The first and second column chain configurations allow the rigid transmission column to withstand horizontal forces, bidirectional push and pull loads, and bidirectional force distribution, eliminating the need for additional guide devices during lifting and lowering. The pressure roller assembly ensures that the four sets of pressure rollers can evenly contact the transmission column, guiding and controlling its forward and backward directions, improving its bending resistance, and further enhancing the overall structural rigidity and stability. Because it is a unidirectional transmission with no backlash, the force is always applied to a single tooth surface during both lifting and lowering, resulting in excellent stability.

[0069] Furthermore, the horizontal height difference between the first and second turns allows the first and second chain links to engage at different phases (angles), resulting in smoother and less abrupt engagement, effectively reducing noise and preventing jamming. Both the first and second chain links are L-shaped, with an angle ranging from 70-80°. By improving and optimizing the shape and size of the first and second chain links, the optimal angle is found, further smoothing the engagement and disengagement processes. This results in a tighter, gapless engagement angle and a smoother disengagement angle, enhancing the transmission column's resistance to horizontal lateral forces and further improving transmission efficiency.

[0070] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0071] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A rigid drive column apparatus, characterized by, The utility model relates to a rigid transmission case is supported through support frame, and the left and right sides of transmission case are provided with first storage box, second storage box respectively, and first storage box, second storage box are provided with first column section chain, second column section chain respectively, and transmission case is driven connection with first column section chain, second column section chain respectively, and first column section chain, second column section chain are connected into transmission stand in vertical direction, and the top of transmission stand is provided with lifting mechanism, and the outside of transmission case is equipped with compression wheel subassembly, and compression wheel subassembly is used for improving the rigidity and stability of transmission stand, The left and right sides in transmission case are provided with first track for first column section chain lifting, second track for second column section chain lifting respectively, and first storage box, second storage box are provided with third track, fourth track respectively, and the bottom of third track is communicated with first track, and the bottom of fourth track is communicated with second track, and the turning of first track and third track is recorded as first turning, and the turning of second track and fourth track is recorded as second turning, and there is height difference in horizontal height between first turning and second turning, The number of compression wheel subassembly is four sets, and four sets of compression wheel subassembly are symmetrically provided in the front and back sides of transmission case respectively, and compression wheel subassembly includes compression wheel and compression wheel shaft connected with compression wheel, and the both sides of compression wheel are provided with two fixed plates, and two fixed plates are connected with compression wheel shaft, and fixed plate is fixedly connected with transmission case, and compression wheel shaft is eccentric shaft. The height of first turning is higher than the height of second turning by 20-40mm.

2. The rigid drive column apparatus of claim 1, wherein, The first column section chain includes a plurality of first column section units connected in sequence, and the second column section chain includes a plurality of second column section units connected in sequence.

3. The rigid drive column apparatus of claim 2, wherein, The first column section unit includes a first bearing shaft, a plurality of first shaft sleeves are arranged on the first bearing shaft at intervals, a first chain piece is arranged between adjacent first shaft sleeves, and two first guide rollers are arranged at the both ends of the first bearing shaft. The second column section unit includes a second bearing shaft, a plurality of second shaft sleeves are arranged on the first bearing shaft at intervals, a second chain piece is arranged between adjacent first shaft sleeves, and two second guide rollers are arranged at the both ends of the first bearing shaft. The first chain piece and the second chain piece are both L-shaped structures.

4. The rigid drive column apparatus of claim 3, wherein, The first chain piece includes a first inner chain plate and a first outer chain plate, and the first inner chain plate is sleeved on the outside of the first bearing shaft. The L-shaped structure forms an angle range of 70-80°.

5. The rigid drive column apparatus of claim 4, wherein, A drive wheel is arranged inside the transmission case, and a reduction motor is arranged outside the transmission case, the drive wheel is connected with the first column section chain, the reduction motor drives the drive wheel to rotate, drives the first column section chain to lift, and the first column section chain and the second column section chain are engaged with each other to realize lifting action.

6. The rigid drive column apparatus of claim 1, wherein, ​ 7. The rigid drive column apparatus of claim 1, wherein, The support frame comprises four supporting legs, which are symmetrically arranged in pairs around the outside of the transmission case, and are connected to the outside of the transmission case through four connecting rods.

Images