A clean trolley

Abstract

This invention discloses a cleanroom overhead crane, belonging to the field of overhead cranes. It includes an outer main beam, on which an inner main beam is slidably coupled via a telescopic drive unit; a traveling mechanism is slidably mounted on the inner main beam, and an anti-static mechanism is configured on the side of the traveling mechanism; dust collection mechanisms, including dust collection hoppers, are connected to the bottom surfaces of both sides of the outer main beam; and dust suction units are also configured on both sides of the outer main beam. This cleanroom overhead crane, through the anti-static mechanism configured on the traveling trolley side, conducts static electricity from wheel-rail friction to a copper base via metal connectors, and then conducts it to the guide rail grounding via a metal ball, eliminating static electricity and preventing dust adsorption; simultaneously, a dust collection hopper covering the wheel assembly is provided on the outer main beam side, which, in conjunction with the dust suction unit linked to the inner main beam, uses a piston rod to periodically apply negative pressure to draw dust into a collection box with a filter, achieving real-time dust collection and gas-solid separation. This prevents dust dispersion and pollution, avoids accumulation and wear or secondary pollution, and ensures that the dust level in the cleanroom meets standards.

Description

Technical Field

[0001] This invention relates to the field of overhead crane technology, and more particularly to a cleanroom overhead crane. Background Technology

[0002] In the field of precision manufacturing such as semiconductors and chips, cleanrooms serve as production environments. By precisely controlling parameters such as air cleanliness, temperature, humidity, and pressure, they keep pollutants such as airborne particles, harmful air, and bacteria at extremely low levels. Among these, air cleanliness is the core indicator. As a key transfer device within the cleanroom, overhead cranes must be adapted to this special environment.

[0003] Existing overhead cranes still have shortcomings in practical applications, making it difficult to effectively solve the problem of static electricity generation during operation. In particular, static electricity is easily generated by the friction between the tires and the crane guide rails during the operation of the trolley. Static electricity enhances the dust adsorption capacity. After the dust is adsorbed onto the surface of the crane, it is easy to fall off under the vibration of the crane operation, causing the amount of dust in the clean room to exceed the control standard. At the same time, it is difficult to achieve timely and efficient collection and discharge of dust generated during operation and isolated dust. Untreated dust is easy to accumulate inside the crane or at key components, which may not only increase equipment wear and generate more dust, but also form secondary pollution in subsequent operation, further damaging the environmental stability of the clean room and making it difficult to guarantee the clean conditions required for manufacturing.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a cleanroom overhead crane to solve the problem of existing overhead cranes having defects, such as the tendency for static electricity to be generated and dust to be attracted during operation due to friction between the tires and guide rails, making the dust difficult to collect and easy to accumulate, leading to cleanroom contamination.

[0006] This invention adopts the following technical solution: a cleanroom crane. It includes an outer main beam, on which an inner main beam is slidably coupled via a telescopic drive unit; a traveling mechanism is slidably arranged along the length of the inner main beam, and an anti-static mechanism is configured on the side of the traveling mechanism; dust collection mechanisms are connected to the bottom surfaces of both sides of the outer main beam, each dust collection mechanism including a dust collection hopper, which is correspondingly arranged below the outer main beam, with its opening facing the gap area between the outer and inner main beams; dust suction units are also configured on both sides of the outer main beam, and these dust suction units move synchronously with the left and right sliding of the inner main beam to collect dust falling into the dust collection hopper.

[0007] Furthermore, the two ends of the outer main beam are fixedly installed at predetermined positions via end beams, and two sets of symmetrically distributed sliding guide rails are provided on the upper and lower end faces of the outer main beam; a support frame is fixedly connected to the inner main beam, and at least four sets of telescopic drive units are provided, which are symmetrically arranged on both sides of the support frame. The support frame slides with the sliding guide rails through the four sets of telescopic drive units to realize the sliding action of the inner main beam relative to the outer main beam.

[0008] Furthermore, the telescopic drive unit includes a traveling bracket, on one side of which are equipped two sets of upper traveling wheels and one set of lower traveling wheels. The two sets of upper traveling wheels are rotatably engaged within an upper sliding guide rail, and the lower traveling wheels are rotatably engaged within a lower sliding guide rail. On the same side of the traveling bracket, between the two sets of upper traveling wheels, a horizontal traveling wheel is also provided, engaging with the inner wall of the sliding guide rail. A servo motor is configured on the other side of the traveling bracket, and the output end of the servo motor is coaxially connected to one of the sets of upper traveling wheels via a coupling to drive the traveling wheels to move along the sliding guide rail.

[0009] Furthermore, the traveling mechanism includes a traveling trolley, on which two sets of traveling pulleys and two sets of fixed brackets are symmetrically mounted on both sides; the two sets of traveling pulleys on the same side are slidably engaged with a second sliding guide rail, which is fixed to the upper end face of the inner main beam; a limiting pulley is rotatably provided on the fixed bracket, which is in contact with the inner side wall of the second sliding guide rail to limit the sliding trajectory of the traveling trolley.

[0010] Furthermore, the dust collection hopper is detachably and fixedly connected to both ends of the outer main beam via two sets of fixing plates, and the opening of the dust collection hopper faces upwards, aligning with the dust falling areas of the upper traveling wheel, lower traveling wheel, limiting pulley, and traveling pulley; the bottom of the dust collection hopper is connected to a dust collection pipe, and the surface of the dust collection pipe faces the inside of the dust collection hopper and has a long strip-shaped dust suction groove, so the dust collection pipe is connected to the dust suction unit through a suction hose.

[0011] Furthermore, two sets of the dust collection units are symmetrically distributed on both sides of the outer main beam. Each dust collection unit includes two sets of negative pressure pipes arranged in a staggered manner. The negative pressure pipes are connected to mounting brackets via pipe clamps. The mounting brackets are fixed to the side of the outer main beam. A piston rod is movably fitted to one end of each set of negative pressure pipes that is close to the other. The negative pressure pipes are connected to the air extraction hoses. The piston rods move in conjunction with the negative pressure pipes via a linkage unit.

[0012] Furthermore, the linkage unit includes a right-angle bracket fixed to the side of the support frame. A contact element is fixed to the inner side of the vertical end of the right-angle bracket. The upper and lower surfaces of the contact element are provided with locking teeth. The locking teeth distributed on the upper and lower sides are engaged with ratchet teeth, and the ratchet teeth at the upper and lower ends are fixed to one end of the piston rod through spherical ends. A boss extends outward from the movable end of the piston rod. A return spring is sleeved on the piston rod. The two ends of the return spring elastically abut against the boss and one end of the negative pressure tube, respectively.

[0013] Furthermore, one end of each of the two sets of negative pressure pipes located on both sides is connected to a collection box via an exhaust hose. The collection box is fixed to the side of the outer main beam. A pull-out box is movably mounted on one side of the collection box, and the pull-out box is locked to the collection box by a latch. An exhaust pipe is connected to the side of the collection box away from the pull-out box. A filter screen is provided at the connection point between the two, and one end of the exhaust pipe is connected through the pull-out box.

[0014] Furthermore, the antistatic mechanism includes a copper base with a U-shaped structure, which is fixedly connected to the side of the traveling trolley via a metal connector; a grounding brush is installed inside the copper base, which is made of copper to ensure conductivity; the bottom of the copper base slides in contact with the upper surface of the inner main beam through an elastic support to achieve real-time conduction of static electricity.

[0015] Furthermore, the elastic support includes a sliding member, with a support rod fixed to the upper surface of the sliding member, the support rod movably passing through the copper base; a support spring is sleeved on the support rod, the two ends of the support spring being connected to the bottom of the copper base and the upper surface of the sliding member, respectively; a metal ball is embedded in the bottom of the sliding member, the metal ball is slidably engaged with a metal guide rail, the metal guide rail is fixed to the upper end face of the inner main beam, and forms an electrostatic conduction path with the grounding brush, the metal guide rail having a grounding wire.

[0016] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: A cleanroom overhead crane employs an anti-static mechanism consisting of a copper base, grounding brush, and elastic support components mounted on the side of the traveling trolley. Metal connectors conduct static electricity generated by wheel-rail friction during trolley operation to the copper base, then guides it to the guide rail via a metal ball and grounds it, eliminating static accumulation and preventing static electricity from enhancing dust adsorption. Simultaneously, dust collection hoppers with openings covering the dust drop area of ​​the wheel assembly are installed on both sides of the outer main beam. These hoppers, working in conjunction with a suction unit that extends and retracts with the inner main beam, create periodic negative pressure via a piston rod. This suction force draws dust from the dust collection hoppers through a dust collection pipe and a suction hose to a collection box with a filter, achieving real-time dust collection and gas-solid separation. This prevents dust from drifting and contaminating the cleanroom, and also prevents dust accumulation from damaging equipment or causing secondary pollution. Ultimately, it ensures that the dust level in the cleanroom meets control standards and stably maintains the cleanliness required for manufacturing. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] In the attached diagram: Figure 1 This is an overall schematic diagram of a cleanroom crane according to this application; Figure 2 for Figure 1 Enlarged view of point A; Figure 3 for Figure 1 A schematic diagram of a partial structure; Figure 4 for Figure 3 Enlarged view of point B; Figure 5 This is a schematic diagram of the cleanroom crane structure; Figure 6 for Figure 5 A schematic diagram of a partial structure; Figure 7 This is a schematic diagram of the telescopic drive unit structure; Figure 8 for Figure 7 Enlarged view of point C; Figure 9 This is a schematic diagram of the dust collection mechanism. Figure 10 for Figure 9 Enlarged view of point D; Figure 11 for Figure 9 A schematic diagram of the bottom structure; Figure 12 for Figure 11 Enlarged view of point E; Figure label: 1. Outer main beam; 11. End beam; 12. Sliding guide rail one; 2. Inner main beam; 21. Support frame; 22. Traveling bracket; 23. Upper traveling wheel; 24. Horizontal traveling wheel; 25. Lower traveling wheel; 26. Servo motor; 27. Sliding guide rail two; 3. Traveling mechanism; 31. Traveling trolley; 32. Fixed bracket; 33. Limiting pulley; 34. Traveling pulley; 4. Dust collection mechanism; 41. Dust hopper; 42. Fixed plate; 43. Mounting bracket; 44. Pipe clamp; 45. Negative 46. ​​Pressure hose; 47. Suction hose; 48. Exhaust hose; 49. Piston rod; 40. Return spring; 410. Right-angle bracket; 411. Contact element; 412. Clamping tooth; 413. Spherical end; 414. Ratchet; 415. Collection box; 416. Pull-out box; 417. Lock; 418. Exhaust pipe; 419. Dust collection pipe; 5. Anti-static mechanism; 51. Copper base; 53. Metal connector; 54. Grounding brush; 55. Support rod; 56. Sliding element; 57. Support spring. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-4 As shown, the present invention provides a cleanroom crane, including an outer main beam 1, an inner main beam 2, a traveling mechanism 3, an anti-static mechanism 5, and a dust collection mechanism 4. The outer main beam 1 is slidably connected to the inner main beam 2 via a telescopic drive unit, enabling the inner main beam 2 to extend or retract relative to the outer main beam 1. The traveling mechanism 3 is slidably arranged along the length of the inner main beam 2, and the anti-static mechanism 5 is mounted on the side of the traveling mechanism 3. The dust collection mechanism 4 is connected to the bottom surfaces of both sides of the outer main beam 1, and includes a dust collection hopper 41, which is correspondingly arranged below the outer main beam 1, with its opening facing the gap between the outer main beam 1 and the inner main beam 2. Dust collection units are also arranged on both sides of the outer main beam 1, and these units move synchronously with the left and right sliding of the inner main beam 2 to collect dust falling into the dust collection hopper 41.

[0022] In this invention, the two ends of the outer main beam 1 of the cleanroom crane are fixedly installed at predetermined positions via end beams 11. Two sets of symmetrically distributed sliding guide rails 12 are arranged on the upper and lower end faces of the outer main beam 1. A support frame 21 is fixedly connected to the inner main beam 2. At least four sets of telescopic drive units are provided. The four sets of telescopic drive units are symmetrically arranged on both sides of the support frame 21. The support frame 21 slides with the sliding guide rails 12 through the four sets of telescopic drive units to realize the sliding action of the inner main beam 2 relative to the outer main beam 1.

[0023] Reference Figures 2-4 As shown, the telescopic drive unit in this invention is mainly used to drive the inner main beam 2 to achieve smooth and precise telescopic sliding relative to the outer main beam 1, so as to adapt to the material transfer requirements of different spans. The preferred telescopic drive unit includes a walking bracket 22. Two sets of upper walking wheels 23 and one set of lower walking wheels 25 are mounted on one side of the walking bracket 22, forming a symmetrical support and rolling structure. The two sets of upper walking wheels 23 are arranged in parallel and rotated in the sliding guide rail 12 at the upper end of the outer main beam 1. The lower walking wheels 25 are correspondingly rotated in the sliding guide rail 12 at the lower end of the outer main beam 1. The stability of the sliding process is ensured by the coordinated support of the upper and lower wheel sets. On the same side of the traveling support 22, between the two sets of upper traveling wheels 23, a horizontal traveling wheel 24 is also provided. This horizontal traveling wheel 24 rolls with the inner wall of the sliding guide rail 12, which can effectively limit the lateral displacement of the traveling support 22 and avoid jamming or uneven loading during sliding. A servo motor 26 is fixedly configured on the other side of the traveling support 22. The output end of the servo motor 26 is rigidly connected to one of the sets of upper traveling wheels 23 coaxially through a coupling. After starting, it can directly drive the upper traveling wheel 23 to rotate, and then drive the entire telescopic drive unit and the inner main beam 2 to perform linear telescopic movements along the sliding guide rail 12 through the friction between the wheel set and the sliding guide rail 12, thereby realizing the control of the telescopic stroke of the inner main beam 2.

[0024] Reference Figures 3-4 As shown, the walking mechanism 3 in this invention is mainly used to carry lifting components or directly bear materials, and moves linearly back and forth along the length of the inner main beam 2 to realize the horizontal transfer of materials in the clean room. Preferably, the walking mechanism 3 includes a walking trolley 31, on both sides of which are symmetrically equipped with two sets of walking pulleys 34 and two sets of fixed supports 32, forming a double-sided symmetrical guide structure. The two sets of walking pulleys 34 on the same side are symmetrically arranged, and the two sets of walking pulleys 34 on the same side are slidably engaged with a sliding guide rail 27. The sliding guide rail 27 is fixed to the upper surface of the inner main beam 2 along its length. Through the rolling engagement between the walking pulleys 34 and the sliding guide rail 27, the moving resistance is reduced and the sliding smoothness is ensured. A limiting pulley 33 is rotatably installed on the fixed bracket 32. The limiting pulley 33 is in a rolling contact with the inner side wall of the sliding guide rail 27, which can limit the lateral deviation of the traveling trolley 31 in real time. This effectively avoids the risk of uneven load, jamming or derailment when it is moving at high speed or under load, and ensures that the traveling trolley 31 always moves stably along the preset trajectory of the sliding guide rail 27, thereby improving the accuracy and safety of material transfer.

[0025] Reference Figures 9-11As shown, in order to capture the dust generated by the friction of each wheel set during the operation of the overhead crane and to prevent the dust from spreading and polluting the cleanroom environment, the dust collection hopper 41 is detachably fixed to both ends of the outer main beam 1 by bolts through two sets of fixing plates 42, which is convenient for installation and disassembly and can ensure the stability of the connection. The opening of the dust collection hopper 41 faces upward and is long and strip-shaped, covering and aligning with the dust falling area of ​​the upper traveling wheel 23, lower traveling wheel 25, limit pulley 33 and traveling pulley 34, ensuring that the dust generated by the friction of the wheel set falls directly into the dust collection hopper 41 as soon as it falls off, preventing the dust from spreading. The bottom of the dust collection hopper 41 is connected to a dust collection pipe 419 along its length. The surface of the dust collection pipe 419 facing the inside of the dust collection hopper 41 has a long strip-shaped dust suction groove (not shown in the figure). This dust suction groove can increase the dust adsorption area and improve the dust collection efficiency. The dust collection pipe 419 is connected to the dust collection unit through the suction hose 46. Under the negative pressure of the dust collection unit, the dust collected in the dust collection hopper 41 enters the dust collection pipe 419 through the dust suction groove, and is then pumped to the subsequent collection device through the suction hose 46 to achieve centralized recycling and treatment of dust.

[0026] The dust collection unit in this invention is mainly used to provide continuous negative pressure suction for the dust collection mechanism 4, quickly extracting and centrally recycling the dust collected in the dust collection hopper 41, avoiding dust accumulation or secondary diffusion, and ensuring the cleanliness of the cleanroom environment. Preferably, two sets of dust collection units are provided, symmetrically distributed on both sides of the outer main beam 1, forming a dual-sided synchronous dust collection structure to ensure that there are no dead corners in dust collection; the dust collection unit includes two sets of negative pressure pipes 45 arranged in a staggered manner. The negative pressure pipes 45 are detachably connected to the mounting frame 43 by pipe clamps 44. The mounting frame 43 is fixed to the side of the outer main beam 1 by welding or bolts, which is convenient to assemble and the connection is stable; Two sets of negative pressure pipes 45 are movably fitted with piston rods 48 at their close ends. The piston rods 48 are in a sealed sliding fit with the inner wall of the negative pressure pipes 45. The middle part of the negative pressure pipes 45 is connected to the suction hose 46 to achieve airflow communication with the dust collection pipe 419 at the bottom of the dust collection hopper 41. The piston rods 48 are linked to the extension and retraction of the inner main beam 2 through a linkage unit. When the inner main beam 2 slides left and right, the linkage unit drives the piston rods 48 to reciprocate along the negative pressure pipes 45, so that a periodic negative pressure is formed inside the negative pressure pipes 45. Then, the suction force is transmitted to the dust collection pipe 419 through the suction hose 46, and the dust in the dust collection hopper 41 is efficiently pumped to the collection device to achieve dynamic synchronous collection of dust.

[0027] Reference Figures 9-12As shown, the linkage unit in this invention is mainly used to convert the kinetic energy of the extension and retraction of the inner main beam 2 into the negative pressure driving force of the dust collection unit, so as to realize the synchronous linkage between the dust collection action and the movement of the inner main beam 2, and improve the real-time performance and efficiency of dust collection. As a preferred linkage unit, it includes a right-angle frame 411 fixed to the side of the support frame 21 by bolts. The inner side of the vertical end of the right-angle frame 411 is fastened with a contact member 410. The upper and lower surfaces of the contact member 410 are provided with locking teeth 412 to form a bidirectional meshing structure. The upper and lower symmetrical locking teeth 412 respectively engage with ratchet teeth 414. The ratchet teeth 414 at the upper and lower ends are fixedly connected to one end of the piston rod 48 at the upper and lower ends through a spherical end 413. The piston rod 48 has an outwardly extending annular boss (not shown in the figure) at its movable end. A return spring 49 is sleeved on the piston rod 48. The two ends of the return spring 49 elastically abut against the end face of the boss and one end face of the negative pressure tube 45, respectively, providing the piston rod 48 with the return force. When the right-angle frame 411 moves to the left with the inner main beam 2, the locking teeth 412 on the upper surface of the contact member 410 engage with the upper ratchet 414, causing the right piston rod 48 to retract into the negative pressure tube 45. A negative pressure is formed in the right negative pressure tube 45, which cooperates to complete the suction action. Conversely, when the right-angle frame 411 moves to the right with the inner main beam 2, the locking teeth 412 on the lower surface of the contact member 410 engage with the lower ratchet 414, causing the left piston rod 48 to retract into the corresponding negative pressure tube 45. A negative pressure is formed in the left negative pressure tube 45, which completes the suction action. Through bidirectional linkage, continuous dust collection is achieved throughout the movement of the inner main beam 2.

[0028] To achieve centralized collection and harmless treatment of dust, prevent secondary dust diffusion and pollution of the cleanroom environment, and facilitate subsequent dust cleaning and recycling, two sets of negative pressure pipes 45 located on both sides of the outer main beam 1 are connected to a collection box 415 via a flexible exhaust hose 47 at their ends. The collection box 415 is fixed to the side of the outer main beam 1 by a bracket or bolts, forming a closed dust conveying channel with the negative pressure pipes 45 and the exhaust hose 47. One side of the collection box 415 is equipped with a pull-out box 416, the edge of which is fitted and sealed against the inner wall of the collection box 415, and is detachably locked to the collection box 415 by a latch 417. The latch 417 adopts a simple press-type or snap-on structure, which is convenient for periodic removal for cleaning or replacement. An exhaust pipe 418 is connected to the side of the collection box 415 away from the pull-out box 416. A high-precision filter (not shown in the figure) is embedded in the connection position between the two. The filter can effectively intercept dust particles in the airflow, realize gas-solid separation, and ensure that the exhaust gas is clean and free of impurities. One end of the exhaust pipe 418 is connected to the pull-out box 416, forming an airflow circulation path of negative pressure pipe 45 → exhaust hose 47 → collection box 415 → filter → exhaust pipe 418 → pull-out box 416. The dust intercepted by the filter will fall into the pull-out box 416 due to gravity or airflow, realizing centralized storage and efficient recycling of dust.

[0029] Reference Figures 7-8 As shown, the antistatic mechanism 5 in this invention is mainly used to guide and discharge static electricity generated by wheel-rail friction during the operation of the traveling trolley 31 in real time, avoiding the accumulation of static electricity that could lead to dust adsorption, equipment interference, or safety hazards, and ensuring the stability of the cleanroom environment and the safety of equipment operation. A preferred antistatic mechanism 5 includes a copper base 51 with a U-shaped structure. The copper base 51 is fixedly connected to the side of the traveling trolley 31 via metal connectors 53 (such as conductive bolts or metal brackets) to ensure a smooth static electricity conduction path. A grounding brush 54 is tightly fitted inside the copper base 51. The grounding brush 54 is integrally formed from high-conductivity copper material, ensuring excellent conductivity and wear resistance to adapt to long-term sliding contact. The bottom of the copper base 51 slides in contact with the upper surface of the inner main beam 2 through an elastic support, maintaining reliable conductive contact and achieving real-time static electricity conduction.

[0030] To ensure that the elastic support remains in close contact with the metal guide rail during the movement of the trolley 31 and to prevent electrical interruption, the elastic support includes a sliding member 56. A support rod 55 is vertically fixed to the upper surface of the sliding member 56. The support rod 55 is movably installed through the bottom of the copper base 51 and can flexibly extend and retract along the copper base 51. A support spring 57 is sleeved on the support rod 55. The two ends of the support spring 57 elastically abut against the bottom end face of the copper base 51 and the upper surface of the sliding member 56, respectively. The spring force continuously presses the sliding member 56 downward to ensure the stability of the fit. The bottom of the sliding component 56 is fitted with a metal ball (such as copper or stainless steel). The metal ball rolls with the metal guide rail fixed on the upper surface of the inner main beam 2. The metal guide rail is pre-connected with a grounding wire and extends to the ground. Together with the grounding brush 54, it forms a complete electrostatic conduction path. When the trolley 31 is running, the static electricity generated by the friction between the tire and the guide rail is quickly conducted to the copper base 51 through the metal connector 53, and then to the support rod 55 through the grounding brush 54. It is then conducted to the sliding component 56 and finally guided to the metal guide rail of the inner main beam 2 through the metal ball. The grounding wire of the guide rail directly discharges the static electricity to the ground, realizing real-time and efficient discharge of static electricity and avoiding the accumulation of dust due to static electricity.

[0031] Working principle: First, the outer main beam 1 is fixed to the preset installation position via the end beam 11, forming a stable support foundation. Driven by the servo motor 26, the telescopic drive unit, through the rolling cooperation of the upper traveling wheel 23, lower traveling wheel 25, and sliding guide rail 12, drives the inner main beam 2 to extend relative to the outer main beam 1. The extension length of the inner main beam 2 can be flexibly adjusted according to the material transfer span requirements, adapting to different cleanroom space layouts. During this process, the close rolling of the horizontal traveling wheel 24 against the inner wall of the sliding guide rail 12 effectively limits lateral displacement, ensuring the stability and accuracy of the inner main beam 2's extension and retraction process.

[0032] During the material transfer phase, the traveling mechanism 3, equipped with lifting components or directly carrying materials, moves linearly back and forth along the length of the inner main beam 2 through the rolling cooperation between the traveling pulley 34 and the upper sliding guide rail 27 of the inner main beam 2. The limiting pulley 33 on the fixed bracket 32 ​​always rolls in close contact with the inner side wall of the sliding guide rail 27, preventing the traveling trolley 31 from being unbalanced or jammed under high-speed movement or load, thus ensuring the accuracy of material transfer. At the same time, the anti-static mechanism 5 works synchronously. The static electricity generated by the wheel-rail friction during the operation of the traveling trolley 31 is conducted to the copper base 51 through the metal connector 53, then to the sliding component 56 through the grounding brush 54 and the support rod 55, and finally guided to the metal guide rail of the inner main beam 2 by the metal ball, and discharged to the ground through the grounding wire, eliminating the risks of dust adsorption and equipment interference caused by static electricity accumulation in real time.

[0033] During crane operation, dust generated by friction between the wheel sets falls directly into the upward-facing dust collection hopper 41, preventing dust from scattering and polluting the environment. During the extension and retraction of the inner main beam 2, the right-angle frame 411 on the side of the support frame 21 moves synchronously. Through the meshing of the teeth 412 and ratchet 414 on the upper and lower surfaces of the contact element 410, the corresponding piston rod 48 moves along the negative pressure pipe 45, creating a periodic negative pressure inside the pipe 45. Under this negative pressure, dust in the dust collection hopper 41 is drawn through the dust collection pipe 419's suction groove and the extraction hose 46 to the collection box 415. After gas-solid separation via a filter, clean gas is discharged through the exhaust pipe 418, while dust falls into the pull-out box 416 for centralized storage. When dust accumulates to a certain amount, the pull-out box 416 can be pulled out for cleaning via the unlocking latch 417, ensuring the cleanliness of the cleanroom environment.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cleanroom crane, characterized in that: The system includes an outer main beam (1), on which an inner main beam (2) is slidably coupled via a telescopic drive unit; a walking mechanism (3) is slidably mounted on the inner main beam (2) along its length, and an anti-static mechanism (5) is mounted on the side of the walking mechanism (3); a dust collection mechanism (4) is connected to the bottom surfaces of both sides of the outer main beam (1), and the dust collection mechanism (4) includes a dust collection hopper (41), which is correspondingly positioned below the outer main beam (1), and its opening faces the gap area between the outer main beam (1) and the inner main beam (2); a dust collection unit is also mounted on both sides of the outer main beam (1), and the dust collection unit moves synchronously with the left and right sliding of the inner main beam (2) to collect the dust that falls into the dust collection hopper (41); Two sets of vacuuming units are provided, symmetrically distributed on both sides of the outer main beam (1). Each vacuuming unit includes two sets of negative pressure pipes (45) arranged in a staggered manner. The negative pressure pipes (45) are connected to mounting brackets (43) through pipe clamps (44). The mounting brackets (43) are fixed on the side of the outer main beam (1). The two sets of negative pressure pipes (45) are movably fitted with piston rods (48) at their close ends. The negative pressure pipes (45) are connected to the suction hoses (46). The piston rods (48) achieve piston movement with the negative pressure pipes (45) through a linkage unit. The linkage unit includes a right-angle frame (411) fixed to the side of the support frame (21). A contact (410) is fixed to the inner side of the vertical end of the right-angle frame (411). The upper and lower surfaces of the contact (410) are provided with locking teeth (412). The locking teeth (412) distributed on the upper and lower sides are engaged with ratchet teeth (414). The ratchet teeth (414) at the upper and lower ends are fixed to one end of the piston rod (48) through a ball end (413). The movable end of the piston rod (48) extends outward with a boss. A return spring (49) is sleeved on the piston rod (48). The two ends of the return spring (49) are elastically abutted against the boss and one end of the negative pressure tube (45), respectively. The antistatic mechanism (5) includes a copper base (51) with a U-shaped structure. The copper base (51) is fixedly connected to the side of the traveling trolley (31) through a metal connector (53). The copper base (51) is equipped with a grounding brush (54) inside. The grounding brush (54) is made of copper to ensure conductivity. The bottom of the copper base (51) slides in contact with the upper surface of the inner main beam (2) through an elastic support to achieve real-time conduction of static electricity. The elastic support includes a sliding member (56), and a support rod (55) is fixed on the upper surface of the sliding member (56). The support rod (55) is movably inserted through the copper base (51). A support spring (57) is sleeved on the support rod (55). The two ends of the support spring (57) are respectively connected to the bottom of the copper base (51) and the upper surface of the sliding member (56). A metal ball is embedded in the bottom of the sliding member (56). The metal ball is slidably fitted with a metal guide rail. The metal guide rail is fixed to the upper end face of the inner main beam (2) and forms an electrostatic conduction path with the grounding brush (54). The metal guide rail has a grounding wire.

2. A cleanroom crane according to claim 1, characterized in that: The two ends of the outer main beam (1) are fixedly installed at the predetermined installation position by end beams (11). The upper and lower end faces of the outer main beam (1) are each equipped with two sets of symmetrically distributed sliding guide rails (12). The inner main beam (2) is fixedly connected to a support frame (21). At least four sets of telescopic drive units are provided. The four sets of telescopic drive units are symmetrically arranged on both sides of the support frame (21). The support frame (21) slides with the sliding guide rails (12) through the four sets of telescopic drive units to realize the sliding action of the inner main beam (2) relative to the outer main beam (1).

3. A cleanroom crane according to claim 2, characterized in that: The telescopic drive unit includes a walking bracket (22). Two sets of upper walking wheels (23) and one set of lower walking wheels (25) are mounted on one side of the walking bracket (22). The two sets of upper walking wheels (23) are rotatably engaged in the upper sliding guide rail (12), and the lower walking wheels (25) are rotatably engaged in the lower sliding guide rail (12). On the same side of the walking bracket (22) and between the two sets of upper walking wheels (23), a horizontal walking wheel (24) is also provided, which engages with the inner wall of the sliding guide rail (12). A servo motor (26) is configured on the other side of the walking bracket (22). The output end of the servo motor (26) is coaxially connected to one of the sets of upper walking wheels (23) through a coupling to drive the walking wheels to move along the sliding guide rail (12).

4. A cleanroom crane according to claim 3, characterized in that: The walking mechanism (3) includes a walking trolley (31), on which two sets of walking pulleys (34) and two sets of fixed brackets (32) are symmetrically mounted on both sides; the two sets of walking pulleys (34) on the same side are slidably engaged with a second sliding guide rail (27), which is fixed to the upper end face of the inner main beam (2); a limiting pulley (33) is rotatably provided on the fixed bracket (32), which is in contact with the inner side wall of the second sliding guide rail (27) to limit the sliding trajectory of the walking trolley (31).

5. A cleanroom crane according to claim 4, characterized in that: The dust collection hopper (41) is detachably and fixedly connected to both ends of the outer main beam (1) through two sets of fixing plates (42), and the opening of the dust collection hopper (41) faces upward, aligned with the dust falling area of ​​the upper traveling wheel (23), lower traveling wheel (25), limiting pulley (33) and traveling pulley (34); the bottom of the dust collection hopper (41) is connected to a dust collection pipe (419), and the surface of the dust collection pipe (419) faces the inside of the dust collection hopper (41) and has a long strip of suction groove, so the dust collection pipe (419) is connected to the suction unit through the suction hose (46).

6. A cleanroom crane according to claim 1, characterized in that: Two sets of negative pressure pipes (45) located on both sides are connected to a collection box (415) at one end through an exhaust hose (47). The collection box (415) is fixed to the side of the outer main beam (1). A pull-out box (416) is movably fitted on one side of the collection box (415). The pull-out box (416) is locked to the collection box (415) through a buckle (417). An exhaust pipe (418) is connected to the side of the collection box (415) away from the pull-out box (416). A filter screen is provided at the connection point between the two, and one end of the exhaust pipe (418) is connected to the pull-out box (416) through.

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