Industrial robot carousel machining process

Abstract

The application discloses an industrial robot turntable processing technology and relates to the field of robot turntables, which comprises a mounting disc, a rotating seat is fixedly arranged at the bottom end of the mounting disc, a plurality of rolling assemblies are arranged on the outer end of the rotating seat, each rolling assembly comprises a supporting plate, two clamping plates are arranged at the end of the supporting plate facing the rotating seat, two vertical plates are fixedly arranged at the bottom end of the supporting plate, a mounting column is arranged between the two vertical plates, end pieces are detachably arranged at the top end and the bottom end of the mounting column, and rolling balls are fixedly arranged on the two end pieces. The rolling assemblies are used to replace the bearing structure on the turntable in the prior art, so that the mounting disc and the rotating seat can be smoothly rotated. Since the rolling balls are arranged at the outer side of the mounting disc and the rotating seat, the maintenance and replacement are more convenient. In addition, since there are a plurality of rolling assemblies, the rotation of the mounting disc is not affected even if one of the rolling assemblies is faulty, and the failure rate is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of robot turntables, specifically to a processing technology for industrial robot turntables. Background Technology

[0002] Nowadays, manual production has been gradually replaced by mechanized production in various industries, which has made the use of industrial robots very common. In order to improve the flexibility of industrial robots, they are generally installed on a special turntable, which drives the industrial robot to rotate laterally and adjust its direction.

[0003] In the prior art, industrial robot turntables are all disc-shaped, with the output shaft of the drive equipment such as motors connected to the center of the disc to drive its rotation, such as an industrial robot turntable with publication number CN219325245U.

[0004] In addition, in order to make the disc rotate more smoothly, the disc in the prior art is equipped with a bearing on the outside of its rotation center. With such a rotating structure, the installation position of the bearing is relatively hidden, and once damaged, it is inconvenient to repair and replace. In addition, the rotation of the bearing depends on the internal balls or rollers. If even one ball or roller cannot rotate normally, the entire bearing cannot rotate smoothly, thus affecting the use of the turntable. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a machining process for an industrial robot turntable. By replacing the bearing structure on the turntable in the prior art with a rolling component, the mounting plate and rotating seat can rotate smoothly. Since the balls are located on the outer side of the mounting plate and rotating seat, maintenance and replacement are more convenient, effectively solving the problems in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an industrial robot turntable processing technology, the specific steps of which are as follows:

[0007] S1: The industrial robot is mounted on the top of the mounting plate. When the industrial robot needs to be rotated, the two motors are turned on. The two motors rotate in the same direction at the same speed and drive the two first pulleys to rotate. The first pulleys drive the two second pulleys to rotate under the action of the belt, and then drive the rotating base and the mounting plate to rotate through the drive shaft.

[0008] S2: The weight of the rotating seat and the mounting plate is supported by the various rolling components. During rotation, the mounting column is perpendicular to the upper plane of the housing. The ball at the bottom of the mounting column is located in the rolling groove at the top of the annular protrusion and contacts the anti-slip pad. During the rotation of the mounting plate and the rotating seat, the ball rolls along the annular track inside the rolling groove.

[0009] S3: During normal rotation, the ball rolls smoothly and there is rolling friction between it and the anti-slip pad. At this time, there is negative pressure inside the negative pressure cylinder. The negative pressure attracts the rubber plug and tightens the tension band. One end of the tension band is fixed to the sleeve, and the sleeve is connected and fixed to the extension shaft through the fixing pin. Therefore, tightening the tension band can fix the sleeve and the extension shaft and restrict their rotation, thereby restricting the rotation of the mounting column. In this way, during normal operation, the position of the mounting column is fixed and kept perpendicular to the upper plane of the box.

[0010] S4: When one of the balls is damaged and its rolling is obstructed, there will be sliding friction between the ball and the anti-slip pad, and the friction will increase. This friction will cause the mounting post to rotate as a whole, and drive the extension shaft to rotate. Under the connection of the fixing pin, the extension shaft and the sleeve will rotate synchronously. The rotation of the sleeve will pull the tension band, which will pull the rubber plug downward and overcome the negative pressure inside the negative pressure cylinder, separating the rubber plug from the negative pressure cylinder. Finally, the mounting post will rotate and tilt, and the ball at its bottom will no longer be in close contact with the anti-slip pad. Since there are multiple balls, even if the ball cannot work properly, it will not affect the rotation of the mounting plate.

[0011] S5: When the ball is damaged, the end piece connected to it can be removed to completely remove and replace the ball. If there is no time to remove and replace it, the mounting post can be rotated 180 degrees to exchange the positions of the two balls, and the balls can be replaced temporarily and quickly, which can enable the mounting plate to operate normally quickly.

[0012] S6: When exchanging the positions of the two balls, remove the retaining pin. This way, when the mounting post drives the extension shaft to rotate 180 degrees, the sleeve will remain fixed. After the exchange is completed, reinsert the retaining pin into its original position to fix the sleeve and extension shaft again. Then, insert the rubber plug back into the opening end of the negative pressure cylinder, rotate the screw to move the sealing block upward inside the negative pressure cylinder, so that the inside of the negative pressure cylinder is under negative pressure again, and fix the rubber plug again.

[0013] Furthermore, the above-mentioned industrial robot turntable processing technology requires an industrial robot turntable to complete the process. The industrial robot turntable includes a mounting plate, a rotating seat is fixedly provided at the bottom of the mounting plate, and multiple rolling components are installed at the outer end of the rotating seat.

[0014] The rolling assembly includes a support plate, and two clamping plates are provided at one end of the support plate facing the rotating seat. The support plate is clamped between the two clamping plates and connected to the clamping plates by bolts. The clamping plates are fixedly mounted on the rotating seat.

[0015] Furthermore, two upright plates are fixedly provided at the bottom end of the support plate, and a mounting column is provided between the two upright plates. The mounting column is movably connected to the two upright plates through a damping rotating shaft.

[0016] The mounting post has detachable end plates at both the top and bottom, and ball bearings are fixed on both end plates. The ball bearings can be replaced by removing the end plates.

[0017] Furthermore, the bottom of the rotating seat is provided with a box, the top of the box is fixedly provided with an annular protrusion, the top of the annular protrusion is provided with a rolling groove, and the inner wall of the rolling groove is fixedly provided with an anti-slip pad.

[0018] The ball bearing at the bottom of the mounting post is located inside the rolling groove and is in contact with the anti-slip pad.

[0019] Furthermore, an extension shaft is fixedly provided on one side of the mounting column, and one end of the extension shaft passes through the vertical plate on the corresponding side and is fixedly provided with a limiting plate;

[0020] The extension shaft is fitted with a sleeve at its outer end, and a fixing pin is provided on the extension shaft. Both ends of the fixing pin pass through the sleeve, thereby connecting the sleeve and the extension shaft into a whole. The fixing pin can be pulled out at will. An elastic tension band is fixedly provided at the top of the sleeve.

[0021] Furthermore, the support plate is provided with a negative pressure assembly, which includes a negative pressure cylinder fixedly mounted on the support plate and the negative pressure cylinder penetrates the support plate;

[0022] A rubber stopper is provided at the opening at the bottom of the negative pressure cylinder. The top end of the tension band is fixedly connected to the rubber stopper. A sealing block is provided inside the negative pressure cylinder. A sealing gasket is fixedly provided at the bottom end of the sealing block to improve the sealing performance of the sealing block. The outer ends of the sealing block and the sealing gasket are in contact with the inner wall of the negative pressure cylinder.

[0023] A screw is mounted on the top of the sealing block via a bearing. The top of the screw extends to the top of the negative pressure cylinder and is connected to the negative pressure cylinder via a thread. A handle is fixedly provided on the top of the negative pressure cylinder.

[0024] Furthermore, a drive shaft is fixedly provided at the bottom of the rotating seat, an insertion hole is provided at the top of the housing, the bottom end of the drive shaft extends into the housing through the insertion hole, and two second pulleys are fixedly provided at the outer end of the drive shaft.

[0025] Furthermore, mounting plates are fixedly provided on both sides of the housing, and a motor is installed on the top of the mounting plate. The output shaft of the motor extends to the bottom of the mounting plate and is fixedly provided with a first pulley, thereby driving the first pulley to rotate.

[0026] The first pulley and the second pulley are in one-to-one correspondence. The outer end of the first pulley is provided with a belt, and the second pulley is connected to the first pulley by the belt.

[0027] Compared with the prior art, the present invention provides an industrial robot rotary table processing technology, which has the following beneficial effects:

[0028] 1. By replacing the bearing structure on the turntable in the existing technology with a rolling assembly, the mounting plate and the rotating seat can rotate smoothly. Since the balls are located on the outer side of the mounting plate and the rotating seat, maintenance and replacement are more convenient.

[0029] Similarly, installing the motor, which is usually installed at the center of the turntable in existing technologies, on the outside of the housing makes it easier to dissipate heat and perform inspection and maintenance.

[0030] 2. The negative pressure of the negative pressure component is used to fix the direction of the mounting column, so that the ball bearings at its bottom end can maintain their normal position during operation. When a ball bearing fails to roll smoothly, the resistance will overcome the negative pressure of the negative pressure component, causing the mounting column to rotate. The ball bearing at its bottom end will no longer be in close contact with the anti-slip pad, thus preventing the faulty ball bearing from affecting the normal operation of other rolling components. Furthermore, since there are multiple balls, even if the ball bearing fails to work properly, it will not affect the rotation of the mounting plate. Compared with the traditional bearing structure, the failure rate is greatly reduced, and the adverse effects of the failure on the turntable are also smaller.

[0031] 3. In an emergency, when the ball bearings are damaged, the mounting post can be rotated 180 degrees to swap the positions of the two ball bearings, allowing for a temporary and quick replacement of the ball bearings. This enables the mounting plate to resume normal operation quickly, shortening maintenance time and reducing the impact of maintenance on work efficiency in emergency situations. Attached Figure Description

[0032] Figure 1 This is a perspective view of the present invention;

[0033] Figure 2 This is a perspective view of the present invention;

[0034] Figure 3 This is a perspective view of the rotating base of the present invention;

[0035] Figure 4 This is a perspective view of the rolling component of the present invention;

[0036] Figure 5 This is a cross-sectional view of the scrolling component of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged view of section A in the middle;

[0038] Figure 7 This is a cross-sectional view of the housing of the present invention;

[0039] Figure 8 For the present invention Figure 7 Enlarged view of section B in the middle.

[0040] In the diagram: 1. Housing; 2. Annular protrusion; 3. Mounting plate; 4. Motor; 5. Rolling assembly; 501. Support plate; 502. Mounting column; 503. Vertical plate; 504. End piece; 505. Ball bearing; 6. Mounting disc; 7. Belt; 8. Rotary seat; 9. First pulley; 10. Drive shaft; 11. Clamping plate; 12. Negative pressure assembly; 1201. Negative pressure cylinder; 1202. Screw; 1203. Sealing block; 1204. Rubber plug; 13. Tension band; 14. Sleeve; 15. Fixing pin; 16. Extension shaft; 17. Limiting plate; 18. Insertion hole; 19. Second pulley; 20. Rolling groove; 21. Anti-slip pad. Detailed Implementation

[0041] To make the technical means, creative features, and achieved objectives and effects of this invention readily understandable, the invention will be further described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] like Figure 1-8 As shown, the present invention provides an industrial robot turntable processing technology, which is completed using an industrial robot turntable. The industrial robot turntable includes a mounting plate 6, an industrial robot is mounted on the top of the mounting plate 6, a rotating seat 8 is fixedly provided at the bottom of the mounting plate 6, and a plurality of rolling components 5 are mounted on the outer end of the rotating seat 8.

[0043] The rolling assembly 5 includes a support plate 501. Two clamping plates 11 are provided at one end of the support plate 501 facing the rotating seat 8. The support plate 501 is clamped between the two clamping plates 11 and connected to the clamping plates 11 by bolts. The clamping plates 11 are fixedly mounted on the rotating seat 8.

[0044] Two upright plates 503 are fixedly provided at the bottom end of the support plate 501, and a mounting column 502 is provided between the two upright plates 503. The mounting column 502 is movably connected to the two upright plates 503 through a damping rotating shaft.

[0045] The mounting post 502 has detachable end pieces 504 at both the top and bottom. Each end piece 504 is fixed with a ball bearing 505. The ball bearing 505 can be replaced by removing the end piece 504.

[0046] When ball 505 is damaged, the end piece 504 connected to it can be removed to completely disassemble and replace ball 505. If there is no time to disassemble and replace it, the mounting post 502 can be rotated 180 degrees to exchange the positions of the two balls 505, and the balls 505 can be replaced temporarily and quickly. This allows the mounting plate 6 to operate normally quickly, shortens maintenance time and reduces the impact of maintenance on work efficiency in emergency situations.

[0047] The bottom of the rotating seat 8 is provided with a box body 1, and the top of the box body 1 is fixedly provided with an annular protrusion 2. The top of the annular protrusion 2 is provided with a rolling groove 20, and the inner wall of the rolling groove 20 is fixedly provided with an anti-slip pad 21.

[0048] The ball bearing 505 at the bottom of the mounting post 502 is located inside the rolling groove 20 and is in contact with the anti-slip pad 21.

[0049] The weight of the rotating base 8 and the mounting plate 6 is supported by the various rolling components 5. During rotation, the mounting post 502 is perpendicular to the upper plane of the housing 1. The ball 505 at the bottom of the mounting post 502 is located in the rolling groove 20 at the top of the annular protrusion 2 and contacts the anti-slip pad 21. During the rotation of the mounting plate 6 and the rotating base 8, the ball 505 rolls along the annular track inside the rolling groove 20. The ball 505 enables the turntable to roll smoothly, thus replacing the traditional bearing structure. The ball 505 is located on the outer side of the mounting plate 6 and the rotating base 8, making maintenance and replacement more convenient.

[0050] Even if one of the scrolling components 5 malfunctions, it will not affect the other scrolling components 5, such as... Figure 4-6 As shown, an extension shaft 16 is fixedly provided on one side of the mounting column 502, and one end of the extension shaft 16 passes through the vertical plate 503 on the corresponding side and is fixedly provided with a limiting plate 17.

[0051] The extension shaft 16 is fitted with a sleeve 14 at its outer end. The extension shaft 16 is provided with a fixing pin 15. Both ends of the fixing pin 15 pass through the sleeve 14, thereby connecting the sleeve 14 and the extension shaft 16 into a whole. The fixing pin 15 can be pulled out at will. The top end of the sleeve 14 is fixed with an elastic tension band 13.

[0052] When swapping the positions of the two ball bearings 505, remove the retaining pin 15. This way, when the mounting post 502 drives the extension shaft 16 to rotate 180 degrees, the sleeve 14 remains fixed. After the swap is completed, reinsert the retaining pin 15 into its original position to fix the sleeve 14 and the extension shaft 16 again.

[0053] The support plate 501 is provided with a negative pressure component 12, which includes a negative pressure cylinder 1201 fixedly installed on the support plate 501 and the negative pressure cylinder 1201 penetrates the support plate 501.

[0054] A rubber stopper 1204 is provided at the opening at the bottom end of the negative pressure cylinder 1201. The top end of the tension band 13 is fixedly connected to the rubber stopper 1204. A sealing block 1203 is provided inside the negative pressure cylinder 1201. A sealing gasket is fixedly provided at the bottom end of the sealing block 1203, which improves the sealing performance of the sealing block 1203. The outer ends of the sealing block 1203 and the sealing gasket are in contact with the inner wall of the negative pressure cylinder 1201.

[0055] The top of the sealing block 1203 is fitted with a screw 1202 via a bearing. The top of the screw 1202 extends to the top of the negative pressure cylinder 1201 and is connected to the negative pressure cylinder 1201 via a thread. The top of the negative pressure cylinder 1201 is fixedly provided with a handle.

[0056] Example 1

[0057] During normal rotation, the ball bearing 505 rolls smoothly, and there is rolling friction between it and the anti-slip pad 21. At this time, there is negative pressure inside the negative pressure cylinder 1201. The negative pressure attracts the rubber stopper 1204 and tightens the tension band 13. One end of the tension band 13 is fixed to the sleeve 14. The sleeve 14 is connected and fixed to the extension shaft 16 through the fixing pin 15. Therefore, tightening the tension band 13 can fix the sleeve 14 and the extension shaft 16 and restrict their rotation, thereby restricting the rotation of the mounting column 502. In this way, during normal operation, the position of the mounting column 502 is fixed so that it remains perpendicular to the upper plane of the housing 1.

[0058] Example 2

[0059] When one of the ball bearings 505 is damaged and its rolling is obstructed, sliding friction will occur between the ball bearing 505 and the anti-slip pad 21, thus increasing the friction force. This friction force causes the mounting post 502 to rotate as a whole, which in turn drives the extension shaft 16 to rotate. Under the connection of the fixing pin 15, the extension shaft 16 and the sleeve 14 rotate synchronously. The rotation of the sleeve 14 will pull the tension band 13, causing the tension band 13 to pull the rubber plug 1204 downward and overcome the negative pressure inside the negative pressure cylinder 1201, separating the rubber plug 1204 from the negative pressure cylinder 1201. Finally, the mounting post 502 rotates and tilts, and the ball bearing 505 at its bottom end is no longer in close contact with the anti-slip pad 21. The faulty ball bearing 505 will no longer affect the normal operation of other rolling components 5. Since there are multiple balls bearings 505, even if the ball bearing 505 cannot work normally, it will not affect the rotation of the mounting plate 6. Compared with the traditional bearing structure, the failure rate is greatly reduced, and the adverse effects of the failure on the turntable are also smaller.

[0060] If the maintenance is carried out by exchanging the positions of the two balls 505 on the mounting post 502, after the exchange is completed, the rubber plug 1204 is inserted back into the open end of the negative pressure cylinder 1201, the screw 1202 is rotated, and the sealing block 1203 is moved upward inside the negative pressure cylinder 1201, so that the inside of the negative pressure cylinder 1201 is under negative pressure again, and the rubber plug 1204 is fixed again.

[0061] To drive the mounting plate 6 and the rotating base 8 to rotate, such as Figure 1 , 2 As shown in Figure 7, a drive shaft 10 is fixedly provided at the bottom of the rotating seat 8, and an insertion hole 18 is provided at the top of the housing 1. The bottom end of the drive shaft 10 extends into the housing 1 through the insertion hole 18, and two second pulleys 19 are fixedly provided at the outer end of the drive shaft 10.

[0062] Mounting plates 3 are fixedly provided on both sides of the housing 1. A motor 4 is installed on the top of the mounting plate 3. The output shaft of the motor 4 extends to the bottom of the mounting plate 3 and is fixedly provided with a first pulley 9, thereby driving the first pulley 9 to rotate.

[0063] The first pulley 9 and the second pulley 19 correspond one-to-one. The outer end of the first pulley 9 is provided with a belt 7, and the second pulley 19 is connected to the first pulley 9 through the belt 7.

[0064] When the industrial robot needs to be rotated, the two motors 4 are turned on. The two motors 4 rotate at the same speed and in the same direction, driving the two first pulleys 9 to rotate. The first pulleys 9 drive the two second pulleys 19 to rotate under the action of the belt 7. Then, the drive shaft 10 drives the rotating seat 8 and the mounting plate 6 to rotate. With this driving method, the motors 4 are located outside the housing 1 and do not need to be installed on the rotating shaft of the mounting plate 6 and the rotating seat 8, which makes heat dissipation and maintenance easier.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An industrial robot turntable, comprising a mounting plate (6), wherein a rotating seat (8) is fixedly provided at the bottom end of the mounting plate (6), and a plurality of rolling components (5) are mounted on the outer end of the rotating seat (8). The rolling assembly (5) includes a support plate (501), and two clamping plates (11) are provided at one end of the support plate (501) facing the rotating seat (8). The support plate (501) is clamped between the two clamping plates (11) and connected to the clamping plates (11) by bolts. The clamping plates (11) are fixedly mounted on the rotating seat (8). The bottom end of the support plate (501) is fixedly provided with two upright plates (503), and a mounting column (502) is provided between the two upright plates (503). The mounting column (502) is movably connected to the two upright plates (503) through a damping shaft. The mounting post (502) has end pieces (504) detachably mounted at both the top and bottom ends, and ball bearings (505) are fixedly mounted on both end pieces (504). The bottom of the rotating seat (8) is provided with a box (1), and the top of the box (1) is fixedly provided with an annular protrusion (2). The top of the annular protrusion (2) is provided with a rolling groove (20), and the inner wall of the rolling groove (20) is fixedly provided with an anti-slip pad (21). The ball bearing (505) at the bottom of the mounting post (502) is located inside the rolling groove (20) and is in contact with the anti-slip pad (21); An extension shaft (16) is fixedly provided on one side of the mounting column (502), and one end of the extension shaft (16) passes through the corresponding side of the upright plate (503) and is fixedly provided with a limiting plate (17). The extension shaft (16) is fitted with a sleeve (14) at its outer end. A fixing pin (15) is provided on the extension shaft (16). Both ends of the fixing pin (15) pass through the sleeve (14). An elastic tension band (13) is fixedly provided at the top end of the sleeve (14). The support plate (501) is provided with a negative pressure component (12), the negative pressure component (12) includes a negative pressure cylinder (1201) fixed on the support plate (501), and the negative pressure cylinder (1201) penetrates the support plate (501). A rubber stopper (1204) is provided at the opening at the bottom of the negative pressure cylinder (1201). The top end of the tension band (13) is fixedly connected to the rubber stopper (1204). A sealing block (1203) is provided inside the negative pressure cylinder (1201). A sealing gasket is fixedly provided at the bottom end of the sealing block (1203). The outer ends of the sealing block (1203) and the sealing gasket are in contact with the inner wall of the negative pressure cylinder (1201). The top of the sealing block (1203) is fitted with a screw (1202) via a bearing. The top of the screw (1202) extends to the top of the negative pressure cylinder (1201) and is connected to the negative pressure cylinder (1201) via a thread. The top of the negative pressure cylinder (1201) is fixedly provided with a handle. The bottom of the rotating seat (8) is fixedly provided with a drive shaft (10), the top of the box (1) is provided with an insertion hole (18), the bottom of the drive shaft (10) extends into the box (1) through the insertion hole (18), and the outer end of the drive shaft (10) is fixedly provided with two second pulleys (19). The housing (1) is fixedly provided with mounting plates (3) on both sides. A motor (4) is installed at the top of the mounting plate (3). The output shaft of the motor (4) extends to the bottom of the mounting plate (3) and is fixedly provided with a first pulley (9). The first pulley (9) and the second pulley (19) correspond one-to-one. The outer end of the first pulley (9) is provided with a belt (7), and the second pulley (19) is connected to the first pulley (9) through the belt (7).

2. A processing method for the industrial robot turntable as described in claim 1, characterized in that: The specific steps are as follows: S1: The industrial robot is installed on the top of the mounting plate (6). When the industrial robot needs to be rotated, the two motors (4) are turned on. The two motors (4) rotate in the same direction at the same speed and drive the two first pulleys (9) to rotate. The first pulleys (9) drive the two second pulleys (19) to rotate under the action of the belt (7). Then, the rotating seat (8) and the mounting plate (6) are driven to rotate through the drive shaft (10). S2: The weight of the rotating seat (8) and the mounting plate (6) is supported by the various rolling components (5). During rotation, the mounting column (502) is perpendicular to the upper plane of the housing (1). The ball (505) at the bottom of the mounting column (502) is located in the rolling groove (20) at the top of the annular protrusion (2) and contacts the anti-slip pad (21). During the rotation of the mounting plate (6) and the rotating seat (8), the ball (505) rolls along the annular track inside the rolling groove (20). S3: During normal rotation, the ball (505) rolls smoothly and there is rolling friction between it and the anti-slip pad (21). At this time, the negative pressure inside the negative pressure cylinder (1201) is negative, which adsorbs the rubber plug (1204) and tightens the tension band (13). One end of the tension band (13) is fixed on the sleeve (14), and the sleeve (14) is connected and fixed to the extension shaft (16) through the fixing pin (15). Therefore, tightening the tension band (13) can fix the sleeve (14) and the extension shaft (16) to restrict their rotation, thereby restricting the rotation of the mounting column (502). In this way, during normal operation, the position of the mounting column (502) is fixed so that it is kept perpendicular to the upper plane of the box (1). S4: When one of the balls (505) is damaged and its rolling is obstructed, there will be sliding friction between the ball (505) and the anti-slip pad (21), and the friction will increase. This friction will cause the mounting post (502) to rotate as a whole and drive the extension shaft (16) to rotate. Under the connection of the fixing pin (15), the extension shaft (16) and the sleeve (14) will rotate synchronously. The rotation of the sleeve (14) will pull the tension band (13), causing the tension band (13) to pull the rubber plug (1204) downward and overcome the negative pressure inside the negative pressure cylinder (1201), separating the rubber plug (1204) from the negative pressure cylinder (1201). Finally, the mounting post (502) will rotate and tilt, and the ball (505) at its bottom end will no longer be in close contact with the anti-slip pad (21). Since there are multiple balls (505), even if the ball (505) cannot work normally, it will not affect the rotation of the mounting plate (6). S5: When the ball (505) is damaged, the end piece (504) connected to it can be removed to completely remove and replace the ball (505). If there is no time to remove and replace it, the mounting post (502) can be rotated 180 degrees to exchange the positions of the two balls (505) and temporarily and quickly replace the ball (505), so that the mounting plate (6) can run normally quickly. S6: When exchanging the positions of the two balls (505), remove the fixing pin (15). In this way, when the mounting post (502) drives the extension shaft (16) to rotate 180 degrees, the sleeve (14) remains fixed. After the exchange is completed, insert the fixing pin (15) back into its original position and fix the sleeve (14) and extension shaft (16) again. Then, insert the rubber plug (1204) back into the opening end of the negative pressure cylinder (1201), rotate the screw (1202), and drive the sealing block (1203) to move upward inside the negative pressure cylinder (1201), so that the inside of the negative pressure cylinder (1201) is under negative pressure again, and fix the rubber plug (1204) again.

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