Adjusting platform for workpiece machining

Abstract

The invention relates to an adjusting platform for workpiece machining, and belongs to the field of mechanical manufacturing, the adjusting platform comprises a deflection adjusting mechanism, the deflection adjusting mechanism comprises an adjusting assembly and a driving assembly, the adjusting platform further comprises a vibration suppression mechanism, and the vibration suppression mechanism comprises a plurality of air bags, a plurality of vibration sensors, a controller and an electric air pump for supplying air to the air bags; a plurality of honeycomb holes are formed in the inclined face of the driving wedge block, the air bags are arranged in the different honeycomb holes, anti-skid stripes are arranged on the surfaces of the air bags, the air bags can protrude out of the honeycomb holes and abut against the inclined face of the driven wedge block after being expanded, the vibration sensors are arranged at different positions of the driving wedge block, and the controller is in electric signal connection with air pumps of the air bags and the vibration sensors. The adjusting base has the advantages that the limitation of the deflection angle of the adjusting base can be reduced, the adjusting base can meet the requirement for more inclination angles, meanwhile, the resonance situation in the machining process is reduced, and the workpiece machining precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of clamp platforms, in particular to an adjusting platform for workpiece machining. BACKGROUND

[0002] In the field of machine tool machining, clamps are indispensable process devices for fixing workpieces on machine tools to facilitate machining.

[0003] REFERENCE Figure 1 An adjusting platform for workpiece machining, comprising a base 1 and an adjusting seat 2, a rotating shaft 3 is arranged on the base 1, the adjusting seat 2 can rotate around the rotating shaft 3 as the center axis, two adjusting plates perpendicular to the adjusting seat 2 are arranged on the adjusting seat 2, the adjusting plates move synchronously with the adjusting seat 2, a plurality of limiting holes are arranged on the adjusting plates, two limiting plates are arranged on the base 1, when the adjusting seat 2 is rotated to a horizontal state, the limiting plates and the adjusting plates are both in a vertical state, a plurality of pin holes are arranged on the limiting plates, when the adjusting seat 2 is rotated to a specific inclination angle, part of the pin holes and the limiting holes are aligned, at this time, the positioning pins 4 can be inserted into the pin holes and the limiting holes to fix the adjusting seat 2.

[0004] However, the current clamp has the following problems in actual use: first, the position of the pin hole is limited, which can only realize the fixation of the adjusting seat at a certain angle, and cannot fully meet the needs of different inclination angles; at the same time, a certain degree of vibration will be generated during the machining of the workpiece, and the workpiece and the clamp will resonate, which will cause machining errors during the machining of the workpiece, therefore, these problems need to be solved. SUMMARY

[0005] In view of the shortcomings of the prior art, the purpose of the present application is to provide an adjusting platform for workpiece machining, which can reduce the limitation of the deflection angle of the adjusting seat, make the adjusting seat meet the needs of more inclination angles, and reduce the resonance during the machining process, thereby improving the machining precision of the workpiece.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: An adjusting platform for workpiece machining, comprising a base, an adjusting seat and a rotating shaft, further comprising a deflection adjusting mechanism, the deflection adjusting mechanism comprising an adjusting assembly and a driving assembly, the adjusting assembly comprising a driving wedge and a driven wedge slidingly arranged on the base, the driving wedge moving horizontally along the direction perpendicular to the rotating shaft of the adjusting seat, the driven wedge moving vertically, the inclined surfaces of the driving wedge and the driven wedge being in contact, the end of the driven wedge away from the driving wedge being hinged to the adjusting seat, the driving assembly being used to drive the driving wedge to move, when the driving wedge moves towards the rotating shaft of the adjusting seat, the driven wedge is pushed upwards; The vibration damping mechanism includes several airbags, several vibration sensors, a controller, and an electric air pump for supplying air to the airbags. Several honeycomb holes are formed on the inclined surface of the active wedge. The airbags are arranged in different honeycomb holes. Anti-slip stripes are provided on the surface of the airbags. After the airbags are inflated, they can protrude out of the honeycomb holes and abut against the inclined surface of the driven wedge. The vibration sensors are arranged at different positions of the active wedge. The controller is electrically connected to the electric air pump and the vibration sensors.

[0007] Furthermore, an oil passage is formed in the active wedge, and several through holes communicating with the oil passage are formed on the side wall of the active wedge. An elastic sheet for sealing the opening of the through hole is provided on the active wedge, and an oil pressure system for supplying oil to the oil passage is provided on the active wedge. The elastic sheet can protrude outward under the action of oil pressure and abut against the inner wall of the base.

[0008] Furthermore, the active wedge has multiple oil chambers, each with a cylindrical inner cavity arranged horizontally, and the oil chambers are arranged at equal intervals, allowing the hydraulic system to supply oil to the oil chambers.

[0009] Furthermore, the drive assembly includes a screw and a nut. The screw is horizontally arranged along a direction perpendicular to the rotation axis of the adjusting seat, and the nut is threaded onto the screw and fixedly connected to the active wedge.

[0010] Furthermore, the inclined surface of the active wedge is divided into three regions—left, middle, and right—along the length of the rotation axis. The honeycomb holes in the middle region are interconnected, and the air passages of all the honeycomb holes in this region are interconnected.

[0011] Furthermore, an auxiliary support column is hinged to the active wedge block, and an elastic pad is fixed to the end of the auxiliary support column. The elastic pad can abut against the bottom surface of the adjusting seat.

[0012] Furthermore, the outer wall of the auxiliary support column is provided with several honeycomb slots.

[0013] Furthermore, a connecting block is fixedly connected to the screw, a positioning rod is slidably disposed on the connecting block, and a plurality of positioning holes are provided on the base, the positioning rod being slidably inserted into any of the positioning holes.

[0014] Compared with the prior art, this application has at least one of the following beneficial technical effects: 1. The adjustment seat is driven to deflect by the cooperation of the active wedge and the driven wedge. This setting enables the entire adjustment seat to achieve continuous stepless adjustment within a certain angle range, overcoming the angle limitations of the traditional pin hole positioning method, and thus meeting more processing requirements. Meanwhile, in the long-term processing use, the traditional pin hole positioning mode, the limit pin is extruded by external force for a long time, the surface of the positioning pin will gradually wear, thus causing the gradually gap between the positioning pin and the pin hole and the limit hole, thus causing the positioning accuracy of the adjusting seat to be reduced, but the inclined surface of the two wedge blocks is matched to drive the adjusting seat to deflect, which is not only convenient for real-time adjustment, but also has a larger contact area, is more evenly stressed, is less worn, can always maintain high positioning accuracy in long-term use, and guarantees the workpiece processing quality; In addition, there is no gap between the inclined surfaces of the driving wedge block and the driven wedge block from a macro perspective, but there is always contact flexibility between the two metal surfaces from a micro perspective. Therefore, an air bag is added between the driving wedge block and the driven wedge block. When the position adjustment of the adjusting seat is completed, the volume of the air bag is expanded. From a micro perspective, the surface of the air bag slightly protrudes from the hole of the honeycomb hole and is extruded against the bottom surface of the driven wedge block, and an additional extrusion force is applied to the driven wedge block. At this time, the position of the driving wedge block and the driven wedge block has not changed macroscopically, but the inflated air bags can form a continuous "flexible damping layer" between the inclined surfaces of the driving wedge block and the driven wedge block, forming a "rigid-flexible-rigid" composite structure, which can play the role of a viscoelastic damping layer. When the vibration of the workpiece processing is transmitted to the air bag, the air inside the air bag is repeatedly and rapidly compressed and expanded, and the air bag wall material is internally rubbed. This process can consume a large amount of vibration energy. Compared with the internal friction between the driving wedge block and the driven wedge block, the damping effect of this structure is better, which is conducive to the stability and firmness of the whole structure, and is conducive to the improvement of the machining precision of the workpiece. On this basis, the hexagonal honeycomb hole provides uniform and omnidirectional lateral restraint for each independent air bag. When the air bag is inflated, the honeycomb wall can effectively prevent the air bag from expanding excessively laterally, ensuring that the air bag mainly expands upward (in the direction of contacting the driven wedge block), thereby providing more uniform and controllable contact pressure. Compared with other shapes of mounting holes, it is more conducive to the efficiency and stability of the overall structure.

[0015] 2. Under the action of the oil pressure system, the elastic sheet will be extruded against the base under the extrusion of the oil pressure. At this time, the driving wedge block is subjected to a clamping force, which is conducive to making the driving wedge block more stable, thereby improving the stability of the adjusting seat.

[0016] 3. Under the action of the oil pressure system, by applying fluid pressure to a sealed chamber, the entire surface of the driving wedge block can be slightly elastically expanded. Although the expansion is small, when the angle of the adjusting seat is fixed and the elastic sheet is extruded, and the entire structure is already stable, this slight elastic expansion can still produce a large "internal stress", thereby causing the driving wedge block to apply a certain pressure outward, making the adjusting seat and the base more of a solid whole, thereby making the structure of the clamp more stable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The overall structure of the clamp in the background art is shown.

[0018] Figure 2 The overall structure of the clamp in the embodiment of the application is shown.

[0019] Figure 3 The overall structure of the clamp in the embodiment of the application is shown.

[0020] Figure 4 For Figure 3 The enlarged view of the middle A part.

[0021] Figure 5 The structure of the active wedge in the embodiment of the application is shown.

[0022] Figure 6 The cross-sectional view of the active wedge in the embodiment of the application is shown.

[0023] Reference signs: 1, base; 2, adjusting seat; 3, rotating shaft; 4, positioning pin; 5, mounting groove; 6, active wedge; 7, driven wedge; 8, screw rod; 9, nut; 10, connecting block; 11, positioning rod; 12, auxiliary support column; 13, positioning hole; 14, air bag; 15, honeycomb hole; 16, oil channel; 17, elastic sheet; 18, through hole; 19, oil cavity; 20, oil pressure system; 21, elastic pad. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application.

[0025] With reference to Figures 2 to 6 The adjusting platform for workpiece machining provided in the embodiment of the application comprises a base 1, an adjusting seat 2, and a deflection adjusting mechanism and a vibration suppressing mechanism arranged on the base 1. In the embodiment, the deflection adjusting mechanism is used to adjust and fix the deflection angle of the adjusting seat 2, and the vibration suppressing mechanism is used to suppress resonance in the machining process, thereby improving the machining precision of the workpiece.

[0026] Specifically, the adjusting seat 2 and the base 1 in the embodiment are both of steel structure, and the adjusting seat 2 and the base 1 are both arranged in the shape of a cuboid. The rotating shaft 3 on the base 1 is arranged at the clamping angle on one side of the base 1, and the rotating shaft 3 is arranged in the horizontal direction. One side of the adjusting seat 2 is fixed with the rotating shaft 3, and the adjusting seat 2 rotates around the rotating shaft 3 as the center shaft, thereby realizing the angle deflection of the adjusting seat 2.

[0027] With reference to Figure 2In order to facilitate the installation of the deflection adjusting mechanism and the vibration suppressing mechanism, a mounting groove 5 is formed in the base 1, and the mounting groove 5 provides a mounting space for the deflection adjusting mechanism.

[0028] The deflection adjusting mechanism comprises an adjusting assembly and a driving assembly.

[0029] Specifically, the adjusting assembly comprises a driving wedge 6 and a driven wedge 7. The driving wedge 6 is slidingly arranged in the mounting groove 5 and moves horizontally along a direction perpendicular to the rotating shaft 3. The inclined surface of the driving wedge 6 is located on the side close to the rotating shaft 3 and is arranged upward.

[0030] The driven wedge 7 is slidingly connected in the mounting groove 5 along a vertical direction. The inclined surface of the driven wedge 7 is located on the side close to the base 1 and is in abutment with the inclined surface of the driving wedge 6. When the driving wedge 6 moves towards the rotating shaft 3, the driven wedge 7 is pushed by the driving wedge 6 and moves upward.

[0031] A connecting rod is fixedly connected to the top of the driven wedge 7. The connecting rod is arranged along a direction parallel to the rotating shaft 3 and is hingedly connected to the bottom surface of the adjusting seat 2. Therefore, when the driven wedge 7 moves upward, the adjusting seat 2 can be rotated around the rotating shaft 3. Meanwhile, the bottom surface of the adjusting seat 2 is provided with a recess to provide space for the movement of the driven wedge 7 and the rotation of the connecting rod, so as to avoid interference.

[0032] The driving assembly is used to drive the movement of the driving wedge 6. In the embodiment, a screw nut mechanism is preferably used as the driving assembly. Specifically, the driving assembly comprises a screw rod 8 and a screw nut 9. The screw rod 8 moves horizontally along a direction perpendicular to the rotating shaft 3. The screw nut 9 is threadedly connected to the screw rod 8 and is fixedly connected to the driving wedge 6.

[0033] The screw rod 8 is manually rotated to drive the screw nut 9 to move horizontally along a direction perpendicular to the rotating shaft 3, thereby driving the driving wedge 6 to move towards or away from the rotating shaft 3. At this time, the movement of the driving wedge 6 pushes the driven wedge 7 to move upward, thereby pushing the adjusting seat 2. The angle of the adjusting seat 2 is thus changed.

[0034] Referring to Figure 2 , Figure 3 and Figure 4 , after the angle of the adjusting seat 2 is determined, in order to prevent the screw rod 8 from being rotated by external force, the end of the screw rod 8 protrudes outside the base 1, and a connecting block 10 is fixedly connected to the end of the screw rod 8. The connecting block 10 is disc-shaped. A positioning rod 11 is slidingly arranged on the connecting block 10. The positioning rod 11 is a cylindrical rod and is arranged along a direction parallel to the screw rod 8.

[0035] A plurality of positioning holes 13 are formed in the side wall of the base 1, and the positioning holes 13 are arranged in a ring shape. With the rotation of the screw rod 8, the positioning rod 11 moves to different positions. At this time, the positioning hole 13 at a certain position is aligned with the positioning rod 11, and the positioning rod 11 is slidably inserted into the positioning hole 13. When the rotation of the screw rod 8 stops, the positioning rod 11 and the positioning hole 13 are inserted to position the screw rod 8, preventing the screw rod 8 from rotating due to external force at this time, and helping to keep the position of the driving wedge 6 stable.

[0036] Referring to Figure 2 , Figure 3 and Figure 6 At the same time, the driving wedge 6 is hinged with an auxiliary support column 12, the auxiliary support column 12 is in a cylindrical shape, and a plurality of honeycomb notches are formed in the outer side wall of the auxiliary support column 12, and the plurality of honeycomb notches are distributed around the outer side wall of the auxiliary support column 12.

[0037] The end of the auxiliary support column 12 is fixedly connected with an elastic pad 21. When the position of the adjusting seat 2 is fixed, the auxiliary support column 12 is rotated, and the elastic pad 21 on the auxiliary support column 12 can abut against the bottom surface of the adjusting seat 2. The auxiliary support column 12 plays an auxiliary reinforcing role, and the elastic pad 21 at the end thereof can adapt to different deflection angles to ensure that the bottom surface of the adjusting seat 2 is always in effective contact.

[0038] When the auxiliary support column 12 is subjected to stress, the hexagonal honeycomb notches can uniformly transmit stress along the honeycomb wall to avoid stress concentration. Compared with the auxiliary support column with a smooth surface, the hexagonal honeycomb notches can reduce weight while maximizing the axial stiffness and bending resistance of the auxiliary support column 12 when bearing compression load.

[0039] Referring to Figure 3 and Figure 5 The vibration suppression mechanism in the embodiment includes a plurality of air bags 14, a plurality of vibration sensors, a controller, and an electric air pump for supplying air to the air bags 14. To implement zoned vibration suppression, the inclined surface of the driving wedge 6 is divided into left, middle, and right regions along the length direction of the rotating shaft 3. The area of the middle region is greater than that of the left and right regions, and the areas of the left and right regions are the same.

[0040] The inclined surface of the driving wedge 6 in contact with the driven wedge 7 is provided with a plurality of honeycomb holes 15, and the air bags 14 are installed in the honeycomb holes 15. One air bag 14 is arranged in each honeycomb hole 15. The side walls of all the honeycomb holes 15 in the middle region are mutually penetrated, and the air paths of the air bags 14 in different honeycomb holes 15 in the region are connected with each other. The honeycomb holes 15 on the left and right sides are independently arranged.

[0041] The vibration sensor is small in size. In the embodiment, five vibration sensors are arranged, four of which are arranged at four corners of the inclined surface where the honeycomb hole 15 is located, and the other is arranged at the center of the inclined surface of the driving wedge 6. When installed, a placement groove for installing the vibration sensor and the controller is formed on the inclined surface. After the vibration sensor and the controller are installed, they are located below the inclined surface, thereby avoiding affecting the normal driving of the driving wedge 6 and the driven wedge 7.

[0042] A multi-path air path distributor is arranged on the electric air pump, and the controller is signal-connected with the vibration sensor and the electric air pump.

[0043] When the angle of the adjusting seat 2 is adjusted to a fixed angle, the controller instructs the air bag 14 to inflate, so that the air bag 14 is expanded and tightly pressed on the inclined surface of the driven wedge 7. At this time, macroscopically, the positions of the driving wedge 6 and the driven wedge 7 remain unchanged. At this time, the plurality of inflated air bags 14 form a continuous “flexible damping layer” between the inclined surfaces of the driving wedge 6 and the driven wedge 7, thereby constituting a “rigid-flexible-rigid” composite structure. This structure can convert mechanical vibration energy into heat energy through internal friction and dissipate the heat energy, thereby effectively suppressing high-frequency vibration and improving machining precision.

[0044] At the same time, when machining vibration occurs, the inflated air bag 14 can provide positive pressure, but due to the limited friction coefficient between the smooth surface of the air bag 14 and the inclined surface of the driven wedge 7, microslip may occur between the air bag 14 and the inclined surface under the action of a large transverse cutting force, thereby weakening the rigidity of the mechanism and the positioning precision. Therefore, in the embodiment, anti-skid stripes are arranged on the outer surface of each air bag 14. The arrangement of the anti-skid stripes can significantly improve the static friction force of the contact surface, effectively inhibit relative sliding, and thereby ensure the reliability and stability of the vibration suppression mechanism.

[0045] Referring to Figure 3 , Figure 5 and Figure 6 , in order to improve the stability of the adjusting seat 2, in the embodiment, an oil channel 16 is formed in the driving wedge 6. The oil channel 16 is located on both sides of the driving wedge 6, and two oil channels 16 are arranged on each side. The inner cavity of the oil channel 16 is cylindrical and arranged horizontally in a direction perpendicular to the rotating shaft 3. A plurality of through holes 18 penetrating the oil channel 16 are formed in the side walls of the driving wedge 6. The through holes 18 are circular in cross section.

[0046] The elastic sheet 17 is fixedly arranged on the driving wedge 6 and used for plugging the hole of the through hole 18. In the embodiment, the elastic sheet 17 is made of high-strength engineering polyurethane material.

[0047] Meanwhile, the active wedge 6 is provided with nine oil cavities 19, and the inner cavity of each oil cavity 19 is in a cylindrical shape and is arranged horizontally in a direction perpendicular to the rotating shaft 3, and the nine oil cavities 19 are arranged in an equidistant array. The oil cavity 19 is a blind hole structure, and the opening is located on the side of the active wedge 6 away from the rotating shaft, and a valve is arranged at the opening for plugging the opening.

[0048] With reference to Figure 3 , Figure 5 and Figure 6 , the active wedge 6 is provided with an oil pressure system 20, which is a conventional oil pressure system in this embodiment, and includes an oil pump and an oil path distributor, and can supply oil to the oil channel 16 and each oil cavity 19 respectively and independently, and the oil cavity 19 and the oil channel 16 are connected to the oil pressure system 20 through pipelines.

[0049] Under the action of the oil pressure system 20, when the hydraulic oil in the oil channel 16 gradually increases, the elastic sheet 17 will bulge outward under the extrusion of the oil pressure, and extrude against the base 1, and under the extrusion of the elastic sheet 17, the entire active wedge 6 is clamped, which is beneficial to make the active wedge 6 more stable, thereby improving the stability of the adjusting seat 2.

[0050] Meanwhile, the oil pressure system 20 supplies oil to the sealed oil cavity 19, and when the sealed oil cavity 19 is subjected to fluid pressure, the entire active wedge 6 has a slight elastic expansion on the surface around it, although the expansion range is small, but at this time, due to the action of the vibration suppression mechanism, the slight expansion at this time can produce significant internal pre-tightening stress, so that the active wedge 6 is combined more closely with the surrounding structure, thereby improving the overall rigidity.

[0051] Principle of implementation: when adjusting, rotating the screw rod 8 to drive the active wedge 6 to move, and push the driven wedge 7 to rise, and change the angle of the adjusting seat 2. When locking, sequentially make the auxiliary support column 12 auxiliary support, control the air bag 14 to suppress vibration, and at the same time, supply oil to the oil cavity 19 and the oil channel 16 by the oil pressure system 20, so that the structure is solidified as a whole. During processing, the vibration sensor monitors in real time, and the controller adjusts the pressure of the air bag 14 in different areas dynamically, so as to flexibly suppress resonance.

[0052] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the creative concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. An adjusting platform for machining workpieces, comprising a base (1), an adjusting seat (2), and a rotating shaft (3), characterized in that, Also included The deflection adjusting mechanism comprises an adjusting assembly and a driving assembly, the adjusting assembly comprises a driving wedge (6) and a driven wedge (7) slidingly arranged on the base (1), the driving wedge (6) moves horizontally along the direction perpendicular to the rotation shaft (3) of the adjusting seat (2), the driven wedge (7) moves vertically, the inclined surface of the driving wedge (6) is in contact with the driven wedge (7), the end of the driven wedge (7) away from the driving wedge (6) is hingedly connected with the adjusting seat (2), and the driving assembly is used for driving the driving wedge (6) to move, when the driving wedge (6) moves towards the direction of the rotation shaft (3) of the adjusting seat (2), the driven wedge (7) is pushed upwards; The vibration suppression mechanism comprises a plurality of air bags (14), a plurality of vibration sensors, a controller and an electric air pump for supplying air to the air bags, a plurality of honeycomb holes (15) are formed in the inclined surface of the driving wedge (6), the air bags (14) are arranged in different honeycomb holes (15), the surface of the air bag (14) is provided with anti-skid stripes, the air bag (14) can protrude out of the honeycomb hole (15) and abut against the inclined surface of the driven wedge (7) after expansion, the vibration sensors are arranged at different positions of the driving wedge (6), and the controller is electrically connected with the electric air pump and the vibration sensors.

2. The adjustable platform of claim 1, wherein: An oil channel (16) is formed in the driving wedge (6), a plurality of through holes (18) penetrating through the oil channel (16) are formed in the side wall of the driving wedge (6), an elastic sheet (17) is arranged on the driving wedge (6) and used for plugging the through hole (18), an oil pressure system (20) is arranged on the driving wedge (6) and used for supplying oil to the oil channel (16), and the elastic sheet (17) can protrude outward and abut against the inner wall of the base (1) under the action of oil pressure.

3. The adjustable platform of claim 2, wherein: A plurality of oil cavities (19) are formed in the driving wedge (6), the inner cavity of each oil cavity (19) is arranged in a cylindrical shape and in a horizontal direction, and a plurality of oil cavities (19) are arranged at equal intervals, and the oil pressure system (20) can supply oil to the oil cavities (19).

4. The adjustable platform of claim 1, wherein: The driving assembly comprises a screw rod (8) and a nut (9), the screw rod (8) is arranged horizontally along the direction perpendicular to the rotation shaft (3) of the adjusting seat (2), the nut (9) is threadedly connected to the screw rod (8), and the nut (9) is fixedly connected with the driving wedge (6).

5. The adjustable platform of claim 1, wherein: The inclined surface of the driving wedge (6) is divided into left, middle and right regions along the length direction of the rotation shaft (3), the honeycomb holes (15) in the middle region are connected with each other, and the air paths of the air bags (14) in all the honeycomb holes (15) in the region are connected with each other.

6. The adjustable platform of claim 1, wherein: An auxiliary supporting column (12) is hingedly connected to the driving wedge (6), an elastic pad (21) is fixedly connected to the end of the auxiliary supporting column (12), and the elastic pad (21) can abut against the bottom surface of the adjusting seat (2).

7. The adjustable platform of claim 6, wherein: A plurality of honeycomb notches are formed in the outer side wall of the auxiliary supporting column (12).

8. The adjustable platform of claim 4, wherein: A connecting block (10) is fixedly connected to the screw (8), and a positioning rod (11) is slidably arranged on the connecting block (10). A plurality of positioning holes (13) are opened on the base (1), and the positioning rod (11) can be slidably inserted into any of the positioning holes (13).

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