Self-locking type directional wheel for movable operating platform and using method of self-locking type directional wheel

Abstract

The invention discloses a self-locking type directional wheel for a movable operation platform and a using method thereof, and relates to the technical field of mechanical engineering, the self-locking type directional wheel for the movable operation platform comprises platform column feet installed at the bottom of the movable operation platform, and a self-locking type directional wheel structure is installed at the bottom of each platform column foot; locking and unlocking are automatically achieved through the vertical load change of the platform, manual operation is not needed, illegal behaviors such as locking forgetting, illegal unlocking and platform moving with people are fundamentally eradicated, the high-place operation safety accident rate is greatly reduced, no electrical element exists, and the safety and reliability of the platform are improved. The platform can adapt to severe environments such as high temperature, dust raising and water spraying in a building construction site, is low in continuous use failure rate and long in period, is far better than electric locking wheels and directional wheels in self-locking cooperation with auxiliary supports for synchronous unfolding in stability and landing skid resistance of the supporting legs, and remarkably improves the anti-overturning capacity and the overall stability when the platform is parked.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, and in particular to a self-locking directional wheel for a movable operating platform and its method of use. Background Technology

[0002] As construction projects become increasingly taller and more complex, traditional fixed scaffolding and temporary working platforms have significant shortcomings: the erection and dismantling processes are cumbersome, require a large amount of labor, and have low turnover efficiency, making it difficult to adapt to rapidly changing construction work surfaces; at the same time, temporary scaffolding has poor stability and inadequate protection, resulting in higher safety risks for working at heights.

[0003] To meet the demands of modern engineering projects for efficient construction, tight schedules, confined space operations, and stringent safety management, mobile, reusable, and standardized mobile operating platforms are being increasingly adopted. However, in actual engineering applications, these platforms have become a major source of safety accidents during high-altitude operations. On-site workers often exhibit weak safety awareness and frequently violate operating procedures. Some workers, seeking convenience, disregard safety regulations and push the platform away without leaving it, which can easily lead to overturning, falls, and other accidents.

[0004] The self-locking mechanism of existing movable operating platforms' directional wheels mostly uses active locking methods such as manual latching, foot pedal locking, and electric control. These require manual operation and are prone to being forgotten to lock or being unlocked illegally. For example, the universal caster disclosed in application number CN202321272077.5, which facilitates directional movement, and the universal caster with steering lock disclosed in application number CN201620755185.1, both use active locking methods such as foot pedal and latching. These require manual operation and are very prone to being forgotten to lock, being missed to lock, or being unlocked illegally for convenience. This makes it impossible to eliminate safety hazards at the root. The electric version also includes electrical components, which have poor adaptability and high failure rate in harsh environments such as high temperature, dust and water spray during construction, and cannot fundamentally solve the safety hazards caused by improper operation. Summary of the Invention

[0005] This invention provides a self-locking directional wheel for a movable operating platform and its usage method, which solves the aforementioned technical problems.

[0006] To solve the above-mentioned technical problems, the present invention provides a self-locking directional wheel for a mobile operating platform and its usage method. It adopts a pure mechanical structure that eliminates the steering component and automatically locks itself upon load triggering. It requires no manual operation and has no electrical components, making it suitable for harsh construction environments. At the same time, it simplifies the structure, reduces costs, and improves assembly and maintenance efficiency.

[0007] As a preferred technical solution of the present invention, a self-locking directional wheel for a mobile operating platform and its usage method, a self-locking directional wheel for a mobile operating platform includes platform legs installed at the bottom of the mobile operating platform, each platform leg having a self-locking directional wheel structure installed at its bottom, and an auxiliary support structure installed on the outside of the self-locking directional wheel structure.

[0008] Based on the above technical solutions, in order to simplify the directional wheel structure, reduce components, lower costs, and improve assembly efficiency, the present invention provides the following technical solution: The self-locking directional wheel structure includes a main cylinder fixed to the bottom of the platform column base. A telescopic groove is provided at the bottom of the main cylinder, and a secondary cylinder is coaxially inserted into the telescopic groove. A limit ring is fixed at the middle of the outer side of the secondary cylinder. A strong spring is provided between the limit ring and the top of the main cylinder. The strong spring is sleeved on the upper part of the secondary cylinder. A limit threaded sleeve is sleeved on the outside of the secondary cylinder. The limit threaded sleeve is threadedly connected to the bottom of the telescopic groove and cooperates with the limit ring for limiting. A bracket is fixed at the bottom of the secondary cylinder. A tire is connected to the lower part of the bracket via a rotating shaft. Two sets of brake connecting parts are symmetrically fixed at the lower part of the main cylinder. Brake pad structures are fixedly installed at the bottom of the two sets of brake connecting parts. The brake pad structures are located inside the bracket and cooperate with the tire for braking and limiting.

[0009] Based on the above technical solutions, in order to achieve replaceable brake pads, reliable braking, and wear resistance and durability, the present invention provides the following technical solution: the brake pad structure includes an arc-shaped plate, a brake pad is fixed on the inner side of the arc-shaped plate, and threaded columns are fixed on both sides of the top of the arc-shaped plate. The threaded columns pass through the brake connector and are fixed by a nut assembly. The brake pad is made of wear-resistant rubber or wear-resistant metal.

[0010] Based on the above technical solutions, in order to achieve automatic deployment of auxiliary supports and improve anti-overturning stability when the platform is parked, the present invention provides the following technical solution: The auxiliary support structure includes a connecting sleeve one fixed in the middle of the main cylinder and a connecting sleeve two fixed in the lower part of the auxiliary cylinder. Two sets of support plates are symmetrically fixed on both sides of the connecting sleeve one. A connecting seat is fixed at the bottom of the support plate. A rotating shaft is rotatably connected to the connecting seat. A transmission gear is fixed in the middle of the rotating shaft. Transmission plates are fixed on both sides of the rotating shaft. A support foot is connected to the end of the transmission plate away from the transmission gear. A movable groove is opened on the side of the support plate facing the directional wheel and communicates with the connecting seat. A sliding plate is slidably connected in the movable groove. A rack is provided at the lower part of the sliding plate and meshes with the transmission gear. Two sets of linkage plates are symmetrically connected on both sides of the connecting sleeve two through a rotating shaft seat. The tops of the two sets of linkage plates are respectively hinged to the upper part of the two sliding plates.

[0011] Based on the above technical solutions, in order to achieve stable contact with the ground and reliable anti-slip performance after the support foot is unfolded, the present invention provides the following technical solutions: there is a height difference between the bottom surface of the support plate and the top surface of the tire; after the transmission plate flips downwards, it is perpendicular to the ground, and the support foot is flush with the ground; the transmission plate can be rotated 180° under the drive of the transmission gear to realize the switching between support unfolding and retraction; the inner side walls of the movable groove are provided with side sliding grooves, and the two sides of the sliding plate are fixed with sliders that are inserted into the side sliding grooves for limited sliding; the bottom of the transmission plate is provided with a connecting groove, and the support foot is rotatably installed in the connecting groove through a rotating shaft, and a torsion spring is installed on the rotating shaft to elastically support and limit the support foot; a rubber pad is fixed to the bottom of the support foot, and the surface of the rubber pad is provided with concave and convex anti-slip texture.

[0012] Based on the above technical solutions, in order to ensure the safe use of the operating platform and facilitate personnel access, the present invention provides the following technical solution: a protective railing is fixed to the top of the movable operating platform, and a ladder is fixedly installed on the front of the movable operating platform.

[0013] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a self-locking directional wheel for a movable operating platform and its method of use, comprising the following steps: S1: Move preparation: Push the movable operating platform to the target position. During the move, the auxiliary cylinder is kept in the extended state under the action of the strong spring, and the tires are not locked, so as to realize the flexible movement of the platform. S2: Self-locking brake: After reaching the designated position, the operator enters the movable operating platform. When a vertical load is generated, the load is transferred to the main cylinder and compresses the strong spring, causing the auxiliary cylinder to retract upward relative to the main cylinder. The tire moves upward and fits tightly with the brake pad structure. The brake pads form friction braking on the tire, realizing the self-locking limit of the directional wheel. S3: Auxiliary support deployment: When the sub-cylinder moves upward, it drives the connecting sleeve two to rise synchronously. The linkage plate pulls the sliding plate to slide upward along the movable groove. The rack at the bottom of the sliding plate drives the transmission gear to rotate, thereby driving the transmission plate to flip and unfold, so that the support foot is in contact with the ground downward to form auxiliary support and improve the stability of the platform when parked. S4: Reset Movement: When the platform needs to be moved again, the operator leaves the movable operating platform, the strong spring rebounds, the strong spring pushes the auxiliary cylinder to extend downward, the tire disengages from the brake pad structure to release the brake, at the same time the connecting sleeve moves down, pushing the sliding plate downward through the linkage plate, and through the gear and rack transmission, the transmission plate flips and retracts, the support feet leave the ground, and the platform movement function is restored.

[0014] Compared with related technologies, the self-locking directional wheel for a movable operating platform and its usage method provided by the present invention have the following beneficial effects: This invention provides a solution that eliminates steering-related components such as steel balls and upper and lower connecting threaded sleeves, significantly reducing the number of components, resulting in a more compact structure, fewer potential failure points, a substantial reduction in the manufacturing cost per wheel, simplified assembly steps, a significant reduction in assembly time per wheel, and a simultaneous decrease in maintenance workload and cost.

[0015] This invention provides a system that automatically locks and unlocks the platform based on changes in vertical load, eliminating the need for manual operation. This fundamentally prevents violations such as forgetting to lock, unauthorized unlocking, and moving the platform with people, significantly reducing the accident rate for working at heights. Furthermore, it contains no electrical components, making it suitable for harsh environments such as high temperatures, dust, and water spray at construction sites. It exhibits a low failure rate and long service life with continuous use, demonstrating stability far superior to electric locking wheels. The self-locking directional wheels, combined with the synchronous deployment of auxiliary supports, and the anti-slip support feet significantly improve the platform's anti-tipping ability and overall stability when parked. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the auxiliary support structure and the self-locking directional wheel structure installed on the movable operating platform in this invention. Figure 2 This is a schematic diagram showing the connection between the auxiliary support structure and the self-locking directional wheel structure of the present invention; Figure 3 This is a schematic diagram of the self-locking directional wheel structure of the present invention; Figure 4 This is a schematic cross-sectional view of the self-locking directional wheel structure of the present invention; Figure 5 This is a schematic diagram of the auxiliary support structure of the present invention; Figure 6 This is a partial unfolded schematic diagram of the auxiliary support structure of the present invention; Figure 7 This is a schematic side cross-sectional view of the unfolded elastic support end of the present invention; Figure 8 This is an enlarged schematic diagram of point A in the present invention.

[0017] Numbered in the diagram: 1. Platform column base; 2. Ladder; 3. Guardrail; 4. Self-locking directional wheel structure; 41. Main cylinder body; 42. Brake connector; 43. Brake pad structure; 431. Brake pad; 432. Threaded column; 433. Arc plate; 44. Tire; 45. Bracket; 46. Sub-cylinder body; 461. Limiting ring; 47. Limiting threaded sleeve; 48. Strong spring; 5. Auxiliary support structure; 51. Connecting sleeve one; 52. Support plate; 521. Movable groove; 5211. Side sliding groove; 522. Connecting seat; 53. Connecting sleeve two; 54. Linkage plate; 55. Transmission plate; 56. Support foot; 57. Sliding plate; 571. Rack; 58. Transmission gear; 6. Movable operating platform. Detailed Implementation

[0018] Example 1, by Figure 1-4 A self-locking directional wheel for a mobile operating platform is provided, comprising platform legs 1 installed at the bottom of the mobile operating platform 6, a self-locking directional wheel structure 4 installed at the bottom of each platform leg 1, and an auxiliary support structure 5 installed on the outside of the self-locking directional wheel structure 4; wherein, a guardrail 3 is fixed to the top of the mobile operating platform 6, and a ladder 2 is fixedly installed on the front of the mobile operating platform 6 to facilitate the safe ascent and descent of workers and provide high-altitude protection.

[0019] The self-locking directional wheel structure 4 includes a main cylinder 41 fixed to the bottom of the platform column 1. The bottom of the main cylinder 41 has a telescopic groove, and a secondary cylinder 46 is coaxially inserted into the telescopic groove. A limit ring 461 is fixed to the middle of the outer side of the secondary cylinder 46. A strong spring 48 is provided between the limit ring 461 and the top of the inner side of the main cylinder 41. The strong spring 48 is sleeved on the upper part of the secondary cylinder 46. A limit threaded sleeve 47 is sleeved on the outside of the secondary cylinder 46. The limit threaded sleeve 47 is threaded to the bottom of the telescopic groove and cooperates with the limit ring 461 for limiting. A bracket 45 is fixed to the bottom of the secondary cylinder 46. A tire 44 is connected to the lower part of the bracket 45 by a rotating shaft. Two sets of brake connectors 42 are symmetrically fixed to the lower part of the outer side of the main cylinder 41. A brake pad structure 43 is fixedly installed at the bottom of the two sets of brake connectors 42. The brake pad structure 43 is located inside the bracket 45 and cooperates with the tire 44 for braking and limiting.

[0020] In this embodiment, the traditional steering assembly is eliminated, and the main cylinder 41 is directly and rigidly connected to the platform column 1, eliminating redundant components such as steel balls, steering wheel, and threaded sleeve. This makes the overall structure more compact, easier to assemble, and has a lower failure rate, while effectively reducing manufacturing costs and maintenance difficulty.

[0021] The brake pad structure 43 includes an arc-shaped plate 433, on the inner side of which a brake pad 431 is fixed. Threaded posts 432 are fixed on both sides of the top of the arc-shaped plate 433. The threaded posts 432 pass through the brake connector 42 and are secured by a nut assembly, facilitating quick disassembly and replacement of the brake pad 431 after wear. The brake pad 431 is made of wear-resistant rubber or wear-resistant metal, ensuring long-term reliable braking and a long service life.

[0022] The working principle of this embodiment is as follows: the strong spring 48 is compressed by the vertical load, so that the main cylinder 41 moves down relative to the auxiliary cylinder 46, which drives the brake pad structure 43 to press against the tire 44 to achieve self-locking. After unloading, the strong spring 48 returns to its original position, and the brake pad structure 43 disengages from the tire 44 to achieve unlocking. The whole process is purely mechanical, requiring no manual operation and no electrical components, and can adapt to the harsh environment of the construction site.

[0023] Example 2, based on Example 1, such as Figure 5-8As shown, the auxiliary support structure 5 includes a connecting sleeve 1 51 fixed in the middle of the main cylinder 41 and a connecting sleeve 2 53 fixed in the lower part of the auxiliary cylinder 46. Two sets of support plates 52 are symmetrically fixed on both sides of the connecting sleeve 1 51. A connecting seat 522 is fixed at the bottom of the support plate 52. A rotating shaft is rotatably connected to the connecting seat 522. A transmission gear 58 is fixed in the middle of the rotating shaft. Transmission plates 55 are fixed on both sides of the rotating shaft. A support foot 56 is connected to the end of the transmission plate 55 away from the transmission gear 58. A movable groove 521 is opened on the side of the support plate 52 facing the directional wheel and communicates with the connecting seat 522. A sliding plate 57 is slidably connected in the movable groove 521. A rack 571 is provided at the lower part of the sliding plate 57 and meshes with the transmission gear 58. Two sets of linkage plates 54 are symmetrically connected on both sides of the connecting sleeve 2 53 through a rotating shaft seat. The tops of the two sets of linkage plates 54 are respectively hinged to the upper parts of the two sliding plates 57.

[0024] There is a height difference between the bottom surface of the support plate 52 and the top surface of the tire 44. After the transmission plate 55 is flipped downwards, it is perpendicular to the ground. The support foot 56 is flush with the ground to ensure stable support and no movement interference with the tire 44.

[0025] The transmission plate 55 can rotate 180° under the drive of the transmission gear 58, realizing the switching between support expansion and retraction, with crisp and smooth movements. The movable groove 521 has side sliding grooves 5211 on both sides of its inner side wall. The sliding plate 57 has sliders fixed on both sides that are inserted into the side sliding grooves 5211 for limited sliding, ensuring that the sliding plate 57 moves smoothly and does not wobble.

[0026] The transmission plate 55 has a connecting groove at the bottom. The support foot 56 is rotatably installed in the connecting groove via a rotating shaft. A torsion spring 59 is installed on the rotating shaft to provide elastic support and limit the support foot 56, so that the support foot 56 always keeps in contact with the ground, improving anti-slip and anti-overturning capabilities. A rubber pad is fixed at the bottom of the support foot 56. The surface of the rubber pad is provided with a textured anti-slip surface, which further enhances the stability of the parking and prevents the platform from slipping.

[0027] The working principle of this embodiment is as follows: when the auxiliary cylinder 46 moves up and down with the load, the sliding plate 57 is pulled up and down through the connecting sleeve 53 and the linkage plate 54. The rack 571 on the sliding plate 57 drives the transmission gear 58 to rotate, thereby driving the transmission plate 55 and the support foot 56 to rotate synchronously, so as to achieve the linkage effect of self-locking (support unfolding) and unlocking (support retracting).

[0028] Example 3: A self-locking directional wheel for a mobile operating platform and its usage method, comprising the following steps: S1: Move preparation: Push the movable operating platform 6 to the target position. During the move, the auxiliary cylinder 46 is kept in the extended state under the action of the strong spring 48, and the tire 44 is not locked, so as to realize the flexible movement of the platform. S2: Self-locking brake: After reaching the designated position, the operator enters the movable operating platform 6 through the ladder 2. When a vertical load is generated, the load is transferred to the main cylinder 41 and compresses the strong spring 48, causing the auxiliary cylinder 46 to retract upward relative to the main cylinder 41. The tire 44 moves upward and fits tightly with the brake pad structure 43. The brake pad 431 forms friction braking on the tire 44, realizing the self-locking limit of the directional wheel. S3: Auxiliary support deployment: When the sub-cylinder 46 moves upward, it drives the connecting sleeve 2 53 to rise synchronously. Through the linkage plate 54, the sliding plate 57 is pulled to slide upward along the movable groove 521. The rack 571 at the bottom of the sliding plate 57 drives the transmission gear 58 to rotate, thereby driving the transmission plate 55 to flip and unfold, so that the support foot 56 is pressed against the ground downward to form auxiliary support and improve the stability of the platform when parked. S4: Reset Movement: When the platform needs to be moved again, the operator leaves the movable operating platform 6, the strong spring 48 rebounds, the strong spring 48 pushes the auxiliary cylinder 46 to extend downward, the tire 44 disengages from the brake pad structure 43 to release the brake, at the same time the connecting sleeve 53 moves down, and pushes the sliding plate 57 to slide down through the linkage plate 54, and drives the transmission plate 55 to flip and retract through the gear and rack transmission, the support foot 56 leaves the ground, and the platform movement function is restored.

[0029] Working principle: In the unloaded (movable) state, the strong spring 48 is in a naturally extended state, pushing the auxiliary cylinder 46 downwards, keeping the tire 44 separated from the brake pad structure 43, and the directional wheel can roll freely; at the same time, the auxiliary support is in a retracted state, does not contact the ground, and does not affect movement.

[0030] When under load (automatic self-locking), when the operator stands on the platform or places a heavy object, the vertical load is transmitted to the main cylinder 41 through the platform column 1, compressing the strong spring 48. The main cylinder 41 moves downward relative to the auxiliary cylinder 46, causing the brake connector 42 and brake pad structure 43 to move downward synchronously, so that the brake pad 431 is in close contact with the surface of the tire 44, generating friction to achieve automatic braking and self-locking.

[0031] When the auxiliary support linkage principle cylinder 46 retracts, it drives the connecting sleeve 53 to move upward, which in turn pulls the sliding plate 57 upward through the linkage plate 54. The rack 571 at the bottom of the sliding plate 57 drives the transmission gear 58 to rotate, which in turn drives the transmission plate 55 to rotate 180°, so that the support foot 56 unfolds downward and touches the ground, forming a rigid support and improving the stability of the platform.

[0032] The unloading and reset principle is as follows: when personnel leave and materials are removed, the load disappears, the strong spring 48 elastically resets, pushes the auxiliary cylinder 46 downward, the brake pad structure 43 separates from the tire 44, and the brake is released; at the same time, the sliding plate 57 moves down, driving the transmission plate 55 to flip and retract, the support foot 56 leaves the ground, and the platform returns to a movable state.

Claims

1. A self-locking directional wheel for a movable operating platform, comprising platform legs (1) mounted on the bottom of the movable operating platform (6), characterized in that: Each of the platform column feet (1) is equipped with a self-locking directional wheel structure (4) at its bottom, and an auxiliary support structure (5) is installed on the outside of the self-locking directional wheel structure (4). The self-locking directional wheel structure (4) includes a main cylinder (41) fixed to the bottom of the platform column (1). A telescopic groove is provided at the bottom of the main cylinder (41), and a secondary cylinder (46) is coaxially inserted into the telescopic groove. A limit ring (461) is fixed to the middle of the outer side of the secondary cylinder (46). A strong spring (48) is provided between the limit ring (461) and the top of the inner side of the main cylinder (41). The strong spring (48) is sleeved on the upper part of the secondary cylinder (46). A limit threaded sleeve (48) is sleeved on the outside of the secondary cylinder (46). 7) The limiting threaded sleeve (47) is threadedly connected to the bottom of the telescopic groove and cooperates with the limiting ring (461) for limiting. The bottom of the auxiliary cylinder (46) is fixed with a bracket (45). The lower part of the bracket (45) is connected with a tire (44). The lower part of the main cylinder (41) is symmetrically fixed with two sets of brake connecting parts (42). The bottom of the two sets of brake connecting parts (42) is fixedly installed with a brake pad structure (43). The brake pad structure (43) is located inside the bracket (45) and cooperates with the tire (44) for braking and limiting. The auxiliary support structure (5) includes a connecting sleeve one (51) that is sleeved and fixed in the middle of the main cylinder body (41) and a connecting sleeve two (53) that is sleeved and fixed in the lower part of the auxiliary cylinder body (46). Two sets of support plates (52) are symmetrically fixed on both sides of the connecting sleeve one (51). A connecting seat (522) is fixed at the bottom of the support plate (52). A rotating shaft is rotatably connected to the connecting seat (522). A transmission gear (58) is fixed in the middle of the rotating shaft. Transmission plates (55) are fixed on both sides of the rotating shaft. The transmission plates (55) are far away from the transmission shaft. One end of the gear (58) is connected to a support foot (56). The support plate (52) facing the directional wheel has a movable groove (521) that communicates with the connecting seat (522). A sliding plate (57) is slidably connected in the movable groove (521). A rack (571) is provided at the lower part of the sliding plate (57) and meshes with the transmission gear (58). The two sides of the connecting sleeve (53) are symmetrically connected to two sets of linkage plates (54) through a rotating shaft seat. The tops of the two sets of linkage plates (54) are respectively hinged to the upper part of the two sliding plates (57).

2. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, The brake pad structure (43) includes an arc plate (433), a brake pad (431) is fixed on the inner side of the arc plate (433), and threaded posts (432) are fixed on both sides of the top of the arc plate (433). The threaded posts (432) pass through the brake connector (42) and are fixed by a nut assembly.

3. The self-locking directional wheel for a movable operating platform according to claim 2, characterized in that, The brake pad (431) is made of wear-resistant rubber or wear-resistant metal.

4. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, There is a height difference between the bottom surface of the support plate (52) and the top surface of the tire (44). After the transmission plate (55) flips down, it is perpendicular to the ground, and the support foot (56) is flush with the ground.

5. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, The transmission plate (55) can be rotated 180° under the drive of the transmission gear (58) to realize the switching between support expansion and retraction.

6. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, The inner two sides of the movable groove (521) are provided with side sliding grooves (5211), and the sliding plate (57) has sliders fixed at both ends that are inserted into the side sliding grooves (5211) for limited sliding.

7. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, The bottom of the transmission plate (55) is provided with a connecting groove, and the support foot (56) is rotatably installed in the connecting groove through a rotating shaft. A torsion spring (59) is installed on the rotating shaft to provide elastic support and limit the support foot (56).

8. The self-locking directional wheel for a movable operating platform according to claim 7, characterized in that, The bottom of the support foot (56) is fixed with a rubber pad, and the surface of the rubber pad is provided with a textured anti-slip pattern.

9. The self-locking directional wheel for a movable operating platform according to claim 1, characterized in that, The movable operating platform (6) is fixed with a guardrail (3) on top and a ladder (2) is fixedly installed on the front of the movable operating platform (6).

10. A self-locking directional wheel for a movable operating platform and its method of use, characterized in that, Includes the following steps: S1: Move preparation: Push the movable operating platform (6) to the target position. During the movement, the auxiliary cylinder (46) is kept in the extended state under the action of the strong spring (48), and the tire (44) is not locked, so as to realize the flexible movement of the platform. S2: Self-locking brake: After reaching the designated position, the operator enters the movable operating platform (6) through the ladder (2). When a vertical load is generated, the load is transferred to the main cylinder (41) and compresses the strong spring (48), causing the auxiliary cylinder (46) to retract upward relative to the main cylinder (41). The tire (44) moves upward and fits tightly with the brake pad structure (43). The brake pad (431) forms friction braking on the tire (44), realizing the self-locking limit of the directional wheel. S3: Auxiliary support deployment: When the sub-cylinder (46) moves upward, it drives the connecting sleeve (53) to rise synchronously. Through the linkage plate (54), the sliding plate (57) is pulled to slide upward along the movable groove (521). The rack (571) at the bottom of the sliding plate (57) drives the transmission gear (58) to rotate, which in turn drives the transmission plate (55) to flip and unfold, so that the support foot (56) is pressed against the ground downward to form auxiliary support and improve the stability of the platform when parked. S4: Reset Movement: When the platform needs to be moved again, the operator leaves the movable operating platform (6), the strong spring (48) rebounds, the strong spring (48) pushes the auxiliary cylinder (46) to extend downward, the tire (44) disengages from the brake pad structure (43) to release the brake, at the same time the connecting sleeve (53) moves down, and pushes the sliding plate (57) to slide downward through the linkage plate (54), and drives the transmission plate (55) to flip and retract through the gear and rack transmission, the support foot (56) leaves the ground, and the platform movement function is restored.

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