A goods lift guide rail device with self-cleaning function

Abstract

This utility model discloses a freight elevator guide rail device with self-cleaning function, including a base, on which a guide rail body is fixedly connected to the upper surface of a boss on the base surface; cleaning components are symmetrically arranged on the left and right sides of the base along the extension direction of the guide rail body; the cleaning components include: a fixed frame, the bottom of which is fixedly installed on the base and arranged along the extension direction of the guide rail body; a drive mechanism, including a drive motor fixed to one end of the fixed frame, the output shaft of which is connected to a threaded rod through a coupling; and a moving mechanism, including a threaded sleeve that is threadedly engaged with the threaded rod, the threaded sleeve forming a sliding pair with the guide rod on the fixed frame through a limiting sleeve. Through the innovative design of mechanical transmission and modular structure, while ensuring the cleaning effect of the guide rail, the device's operational reliability, maintenance convenience, and adaptability are significantly improved, making it particularly suitable for freight elevator guide rail systems in high-load, high-dust environments.

Description

Technical Field

[0001] This utility model relates to the technical field of freight elevator mechanical components, specifically a freight elevator guide rail device with self-cleaning function. Background Technology

[0002] As an important vertical transportation equipment in modern logistics and construction, the stability and cleanliness of the guide rail system of freight elevators directly affect their operational safety and service life. During long-term use, traditional freight elevator guide rails are prone to accumulating dust, oil, metal shavings and other impurities, which increases the friction between the guide rail and the guide shoe, generates abnormal noise, and even accelerates the wear of the guide rail, affecting the smoothness and safety of the freight elevator operation.

[0003] In logistics warehousing, industrial production, and other scenarios, freight elevator guide rails are constantly exposed to polluted environments such as dust, oil, and metal shavings, which can easily lead to the accumulation of impurities on the working surface of the guide rails, resulting in the following problems:

[0004] Increased friction and abnormal wear: The dirt accumulated on the surface of the guide rail increases the friction coefficient between the guide shoe and the guide rail, which not only generates noise but also accelerates the wear of the guide rail. In severe cases, it may cause the guide wheel to jam, affecting the safe operation of the freight elevator.

[0005] Manual cleaning is inefficient: Traditional cleaning methods rely on regular manual wiping or simple scraping, which has problems such as incomplete cleaning, long maintenance cycles, and high risks of working at heights, making it difficult to meet the maintenance needs of freight elevator guide rails that are used frequently.

[0006] Therefore, a freight elevator guide rail device with self-cleaning function is proposed to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this utility model is to provide a freight elevator guide rail device with self-cleaning function, so as to solve the problem mentioned in the background art that in the current logistics warehousing and industrial environment, freight elevator guide rails are easily contaminated by dust, oil and other pollutants for a long time, which can easily lead to the accumulation of impurities on the working surface. This not only increases friction and causes abnormal wear and noise, but also makes it difficult to meet the high-frequency maintenance needs due to the low efficiency and high risk of manual cleaning.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a freight elevator guide rail device with self-cleaning function, comprising a base,

[0009] The upper surface of the base surface boss is fixedly connected to the guide rail body;

[0010] Cleaning components are symmetrically arranged on the left and right sides of the base along the extension direction of the guide rail body.

[0011] The cleaning components include:

[0012] A fixed frame, the bottom of which is fixedly installed on the base and set along the extension direction of the guide rail body;

[0013] The drive mechanism includes a drive motor fixed to one end of a fixed frame, and its output shaft is connected to a threaded rod via a coupling.

[0014] The moving mechanism includes a threaded sleeve that is threadedly engaged with a threaded rod, the threaded sleeve forming a sliding pair with a guide rod on a fixed frame via a limiting sleeve;

[0015] A rotary cleaning mechanism includes brackets symmetrically fixed to the top of a threaded sleeve. A roller is rotatably mounted between the two brackets. A gear is fixedly sleeved on the outer periphery of the roller at the center position between the two brackets. A rack is meshed on one side of the gear. The rack is fixed to a fixed frame.

[0016] The roller is connected to the cleaning disc via a connecting assembly, and the brush of the cleaning disc remains in contact with the working surface of the guide rail body.

[0017] Preferably, the connecting assembly includes a first connecting shaft cylinder and a second connecting shaft cylinder symmetrically arranged on both sides thereon. One end of the first connecting shaft cylinder is fixedly connected to the roller, and the other end is provided with a limiting block. The second connecting shaft cylinder is provided with a limiting block at the center of its end facing the first connecting shaft cylinder. The roller and the second connecting shaft cylinder are respectively provided with a block receiving cavity that cooperates with the limiting block. The first connecting shaft cylinder and the second connecting shaft cylinder are symmetrically provided with assembly holes at the center of their maximum contact surfaces. An insert shaft head is inserted into the hole. One end of the insert shaft head is connected to a fastening screw, and an auxiliary positioning component is threaded onto the fastening screw.

[0018] Preferably, the roller end is provided with a bearing, and the fixed frame has a guide groove for the bearing to slide.

[0019] Preferably, the drive motor is a servo motor.

[0020] Preferably, the brush of the cleaning disc is made of a composite material of nylon and steel wire, and the length of its bristles is 1 to 3 mm longer than the depth of the recess on the working surface of the guide rail body.

[0021] Preferably, Hall sensors are installed at both ends of the fixed frame to detect the extreme positions of the threaded sleeve.

[0022] Preferably, the guide rail groove is fitted with a self-lubricating bushing, and the bearing is a deep groove ball bearing.

[0023] Compared with the prior art, the beneficial effects of this utility model are: This freight elevator guide rail device with self-cleaning function, through the innovative design of mechanical transmission and modular structure, significantly improves the operational reliability, maintenance convenience and adaptability of the device while ensuring the cleaning effect of the guide rail. It is especially suitable for freight elevator guide rail systems in high-load and high-dust environments. The specific details are as follows:

[0024] 1. Improved cleaning efficiency:

[0025] The linear motion of the threaded sleeve is converted into the rotational motion of the roller by the meshing transmission of gears and fixed racks, so that the cleaning disc rotates synchronously as it moves along the guide rail, forming a compound cleaning action that effectively removes stubborn dust from the grooves of the guide rail working surface.

[0026] The brush design, made of a composite material of nylon and steel wire, can remove oil stains without scratching the surface of the guide rail. Its extra-long bristles of 1-3mm can reach deep into the recessed parts of the guide rail to achieve thorough cleaning.

[0027] 2. Structural stability optimization:

[0028] The sliding pair formed by the limiting sleeve and the guide rod, combined with the limiting movement of the bearing in the guide rail groove, double-constrains the movement trajectory of the threaded sleeve, preventing deviation during the cleaning process;

[0029] The connecting component uses a limit block and a block receiving cavity for plug-in engagement, supplemented by axial locking of the insert shaft head, to ensure that the cleaning disc maintains a reliable connection under high-frequency vibration conditions;

[0030] 3. Intelligent control and ease of maintenance:

[0031] The servo motor drive, combined with the Hall sensor for extreme position detection, enables precise control of the cleaning process and automatic reciprocating operation.

[0032] The modular design of the cleaning tray and the detachable connection components facilitate quick replacement of worn parts and reduce maintenance costs;

[0033] 4. Long-term operational support:

[0034] The combination of self-lubricating bushings embedded in the guide rail grooves and deep groove ball bearings significantly reduces wear on moving parts and extends the service life of the device.

[0035] The symmetrically arranged cleaning components can simultaneously process dirt on both sides of the guide rail, avoiding uneven force caused by cleaning on one side. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;

[0037] Figure 2This utility model Figure 1 Schematic diagram of the three-dimensional structure at the fixed frame in the middle;

[0038] Figure 3 This utility model Figure 2 Partial sectional view of the fixed frame structure;

[0039] Figure 4 This utility model Figure 3 Schematic diagram of the structure of the cleaning component;

[0040] Figure 5 This is a three-dimensional structural diagram of the cleaning tray in this utility model;

[0041] Figure 6 This is an exploded structural diagram of the connecting component in this utility model.

[0042] In the diagram: 1. Base; 2. Guide rail body; 3. Cleaning assembly; 301. Fixing frame; 302. Drive motor; 303. Threaded rod; 304. Threaded sleeve; 305. Limiting sleeve; 306. Guide rod; 307. Bracket; 308. Roller; 309. Gear; 310. Rack; 311. Bearing; 312. Guide rail groove; 4. Connecting assembly; 401. First connecting shaft cylinder; 402. Second connecting shaft cylinder; 403. Limiting block; 404. Block receiving cavity; 405. Assembly hole; 406. Inserted shaft head; 407. Fastening screw; 408. Auxiliary positioning component; 409. Cleaning disc. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] Please see Figure 1-6 The present invention provides a technical solution: a freight elevator guide rail device with self-cleaning function, including a base 1, a guide rail body 2 fixedly connected to the upper surface of the boss on the surface of the base 1; cleaning components 3 are symmetrically arranged on the left and right sides of the base 1 along the extension direction of the guide rail body 2.

[0045] The base 1, integrally cast from high-strength cast iron, features a 30-50mm raised platform structure on its surface. This enhances overall rigidity to resist elevator vibrations and raises the guide rail mounting reference surface to prevent dust accumulation at the bottom from affecting accuracy. The guide rail body 2 employs a hardened T-shaped structure, fixed to the upper surface of the base's raised platform with high-strength bolts. The mounting surface is precision ground to ensure a flatness error of ≤0.1mm, guaranteeing stable operation. In terms of cleaning system layout, cleaning components 3 are symmetrically arranged on both sides of the base 1. The parallelism tolerance between their center lines and the guide rail center lines is strictly controlled within 0.2mm, and precise height adjustment achieves full coverage cleaning of the guide rail's working surface. This symmetrical design ensures even distribution of cleaning force, preventing unilateral wear. In summary, through optimized base structure, precise installation, and the arrangement of cleaning components, this device significantly improves the stability, cleaning effect, and maintenance efficiency of the guide rail, demonstrating outstanding practical value.

[0046] The cleaning component 3 includes: a fixed frame 301, the bottom of which is fixedly mounted on the base 1 and extended along the guide rail body 2; a drive mechanism, including a drive motor 302 fixed to one end of the fixed frame 301, the output shaft of which is connected to a threaded rod 303 via a coupling; and a moving mechanism, including a threaded sleeve 304 that is threadedly engaged with the threaded rod 303, the threaded sleeve 304 forming a sliding pair with the guide rod 306 on the fixed frame 301 via a limiting sleeve 305.

[0047] This cleaning component 3 uses an aluminum alloy profile to construct the fixed frame 301, with a rectangular cross-section. It is securely connected to the base 1 using M8 hex bolts. The length of the frame is parallel to the guide rail body 2 (parallelism ≤ 0.15mm / m). The drive mechanism uses a 400W servo motor 302, which is fixed to the end of the frame via a flange and connected to a chrome-plated ball screw using a flexible coupling to effectively compensate for coaxiality errors. The moving mechanism consists of a threaded sleeve 304 with an embedded bronze nut that precisely engages with the ball screw, forming a dual-guide system with an engineering plastic limit sleeve 305 and a hard chrome-plated guide rod 306. The key clearance is controlled within 0.02- With a precision of 0.05mm, ensuring backlash-free movement, this design combines structural stability with lightweight construction. The combination of a servo motor and encoder achieves a positioning accuracy of ±0.1mm, while flexible couplings and self-lubricating bearings significantly enhance transmission reliability and smoothness. The combination of modular chrome-plated components (threaded rod 303, guide rod 306) and engineering plastic parts enhances wear resistance and corrosion resistance, adapting to harsh working conditions, while maintaining operating noise below 65 decibels. Through optimized power configuration and dual-guide anti-deviation design, the overall design excels in precision, durability, and ease of maintenance, providing an efficient, low-noise, and long-life solution for cleaning freight elevator guide rails.

[0048] The rotating cleaning mechanism includes brackets 307 symmetrically fixed to the top of the threaded sleeve 304. A roller 308 is rotatably mounted between the two brackets 307. A gear 309 is fixedly sleeved on the outer periphery of the roller 308 at the center position between the two brackets 307. A rack 310 meshes with one side of the gear 309. The rack 310 is fixed on the fixed frame 301.

[0049] The rotating cleaning mechanism uses a symmetrical bracket 307, precision cast from 45# steel, which is fixed to the top of the threaded sleeve 304 by four M6 hexagon socket head cap bolts. The mounting surface is ground to ensure parallelism ≤0.05mm. The inner H7-grade tolerance bearing hole precisely positions the roller 308. The roller is made of 40Cr alloy steel and surface hardened (HRC50-55). Both ends are supported by 6204 deep groove ball bearings, and the middle is keyed to a 2.5 module 20CrMnTi alloy steel gear 309. The tooth surface is carburized and quenched (hardened layer 0.8-1.2mm). The rack 310 is made of HRC58-62 alloy steel and is fixed to the side of the fixed frame 301 with screws. The meshing clearance with the gear is precisely controlled at 0.08-0.12mm, and the installation straightness is ensured. With a diameter of ≤0.1mm / m, this mechanism ensures that the radial runout of the rollers is ≤0.02mm through a symmetrical support structure and precision machining. The hardened transmission components (roller 308, gear 309, rack 310) significantly improve wear resistance and load-bearing capacity. The deep groove ball bearing 311 and the optimized meshing clearance design achieve low-friction transmission (noise ≤60 decibels), and the keyed connection method ensures the reliability of power transmission. The modular support and standardized bearing design facilitate disassembly and maintenance, and the adjustable meshing clearance adapts to different working conditions. The compact structure balances strength and space efficiency. The overall design excels in rotational stability, transmission accuracy (rack straightness control), service life (hardened layer depth), and maintenance convenience, providing a high-efficiency, low-noise, and durable rotational cleaning solution for freight elevator guide rails.

[0050] The roller 308 is connected to the cleaning disc 409 via the connecting assembly 4. The brush of the cleaning disc 409 is kept in contact with the working surface of the guide rail body 2. The connecting assembly 4 includes a first connecting shaft cylinder 401 and a second connecting shaft cylinder 402 symmetrically arranged on both sides of it. One end of the first connecting shaft cylinder 401 is fixedly connected to the roller 308, and the other end is provided with a limiting block 403. The second connecting shaft cylinder 402 is provided with a limiting block 403 at the center of the end facing the first connecting shaft cylinder 401. The roller 308 and the second connecting shaft cylinder 402 are respectively provided with a block receiving cavity 404 that cooperates with the limiting block 403. The first connecting shaft cylinder 401 and the second connecting shaft cylinder 402 are symmetrically provided with assembly holes 405 at the center of the maximum contact surface. An insert shaft head 406 is inserted into the hole. One end of the insert shaft head 406 is connected to a fastening screw 407. An auxiliary positioning component 408 is threadedly connected to the fastening screw 407.

[0051] The connecting assembly 4 uses a precision-machined first connecting shaft cylinder 401 made of 45# steel, which is connected to the roller 308 with an H7 / k6 transition fit. Two second connecting shaft cylinders 402 of the same material are symmetrically arranged. All contact surfaces are ground to ensure a flatness ≤0.03mm. The limiting mechanism consists of a trapezoidal limiting block 403 with a hardness of HRC40-45 and a matching block receiving cavity 404, with a fit clearance of 0.02-0.05mm, capable of withstanding 500N axial and 300N radial loads. The fastening system includes a 12mm diameter mounting hole 405, a stepped shaft insert head 406, and an 8.8 grade M8 fine-thread fastening screw 407, which, together with a wing nut 408 with an anti-loosening washer, achieves a reliable connection. This assembly is precision-machined to ensure that the surface roughness Ra of each connecting surface is ≤1.6μm and the axial runout is ≤1.6μm. 0.05mm, fastening torque 15±1N·m; the cleaning disc 409 is fixed to the second connecting shaft cylinder 402 by bolts, and adopts a composite brush of nylon and stainless steel wire, with the bristle length adjustable by ±2mm, and the contact pressure with the guide rail is controlled at 5-8N; the trapezoidal limit block and the precision-fitted receiving cavity provide stable axial positioning, and the transition fit shaft cylinder connection ensures reliable power transmission; the modular design and standardized fasteners facilitate quick disassembly and maintenance, and the stepped shaft structure and symmetrical assembly holes achieve precise radial positioning and balanced force; the optimized material selection (hardened limit block) and process control (surface roughness) significantly improve wear resistance and service life, making the connecting component perform excellently in terms of mechanical strength, assembly accuracy, running stability and maintenance convenience, providing a stable and efficient end-execution guarantee for the guide rail cleaning mechanism;

[0052] The roller 308 is provided with a bearing 311 at its end. The fixed frame 301 has a guide groove 312 for the bearing 311 to slide. A self-lubricating bushing is embedded in the guide groove 312. The bearing 311 is a deep groove ball bearing.

[0053] The smooth operation of the rotating cleaning mechanism is achieved through the precise fit between the bearing 311 and the guide rail groove 312 (clearance 0.02-0.05mm). The straightness error of the guide rail groove is ≤0.1mm / m, ensuring stable sliding at the end of the roller 308 and effectively suppressing vibration and offset. The low-friction coefficient sliding pair design significantly reduces running resistance and improves transmission efficiency. In terms of structural reliability, the deep groove ball bearing 311 has high radial load capacity, which, combined with the guide rail groove 312 with an embedded self-lubricating bushing, reduces maintenance requirements and can adapt to complex loads. In terms of durability design, the bearing adopts a sealed structure for dust and dirt prevention, and the surface of the guide rail groove is hardened (HRC50-55) to improve wear resistance. The modular installation method facilitates quick replacement. The guide rail groove size is precisely matched with the bearing to ensure stable fit and adaptability to high-speed rotation and reciprocating motion conditions. At the same time, the operating noise is controlled below 60 decibels. The overall design performs excellently in terms of smooth operation, structural reliability, durability, and adaptability to working conditions.

[0054] The brush of cleaning disc 409 is made of a composite material of nylon and steel wire, and its bristle length is 1 to 3 mm longer than the recess depth of the working surface of the guide rail body 2.

[0055] The composite material design of nylon and steel wire (70% nylon, 30% steel wire) combines flexible cleaning with powerful stain removal capabilities. Nylon fibers effectively remove surface dust, while steel wire removes stubborn oil stains and metal shavings. The design of the bristles extending 1-3mm beyond the guide rail's recessed depth ensures that the brush always maintains appropriate contact pressure (3-5N) with the guide rail's working surface, guaranteeing thorough cleaning while avoiding excessive wear on the guide rail surface. The elastic properties of the composite material allow the brush to adapt to the unevenness of the guide rail surface, achieving comprehensive cleaning coverage.

[0056] Hall sensors are installed at both ends of the fixed frame 301 to detect the extreme positions of the threaded sleeve 304;

[0057] The Hall sensor detection system employs a high-sensitivity (±50Gs) non-contact detection scheme, combined with a permanent magnet target to achieve a repeatability accuracy of ±0.5mm. Symmetrical installation at both ends ensures reliable detection of the 304 threaded sleeve's extreme positions. Signal stability is guaranteed through three-wire shielded wiring and temperature compensation circuitry. In terms of safety protection, it integrates millisecond-level shutdown response, dual signal verification, and fault self-diagnosis functions to effectively prevent false triggering and equipment malfunctions. A complete technical support system is formed in terms of precise positioning, environmental adaptability, safety protection, and sustainability, providing a highly reliable position detection solution for cleaning components.

[0058] Working principle: Before using this self-cleaning freight elevator guide rail device, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 6 As shown,

[0059] Working process of drive and movement mechanism

[0060] First, the drive motor 302, preferably a servo motor, is started. Its output shaft drives the threaded rod 303 to rotate through a coupling. The threaded sleeve 304, which is threaded with the threaded rod 303, moves axially under the action of rotation. At the same time, the sliding pair between the limit sleeve 305 and the guide rod 306 ensures that the movement is smooth and without deflection.

[0061] Rotary cleaning mechanism linkage process

[0062] When the threaded sleeve 304 moves, it drives the top fixed bracket 307 and roller 308 to move synchronously; the gear 309 fixedly installed on the roller 308 meshes with the rack 310 on the fixed frame 301, so that the roller 308 rotates while translating; the two ends of the roller 308 are connected to the guide groove 312 through the bearing 311, such as deep groove ball bearing, to reduce friction and ensure smooth rotation. The guide groove 312 is embedded with a self-lubricating bushing to further reduce wear.

[0063] The cleaning tray performs the cleaning action.

[0064] The roller 308 drives the cleaning disc 409 to rotate via the connecting component 4. The nylon and steel wire composite material of its brush is in close contact with the working surface of the guide rail body 2. Since the length of the brush bristles is 1 to 3 mm longer than the depth of the guide rail recess, it can effectively remove stubborn dirt while avoiding excessive wear on the guide rail surface. Under the combined rotation and translation of the roller 308, the cleaning disc 409 performs bidirectional brushing on the working surface of the guide rail to ensure thorough cleaning.

[0065] Quick assembly and disassembly mechanism for connecting components

[0066] The connecting assembly 4 adopts a plug-in structure of the first connecting shaft cylinder 401 and the second connecting shaft cylinder 402. Axial positioning is achieved through the cooperation of the limiting block 403 and the block receiving cavity 404. After the insert shaft head 406 is inserted into the assembly hole 405, it is locked by the fastening screw 407 and the auxiliary positioning part 408 to ensure a stable connection and facilitate maintenance and replacement.

[0067] Safety and Limit Control

[0068] Hall sensors installed at both ends of the fixed frame 301 monitor the position of the threaded sleeve 304 in real time. When it moves to the limit position, the feedback signal controls the drive motor 302 to stop or reverse, preventing the mechanism from being damaged by overtravel.

[0069] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A freight elevator guide rail device with self-cleaning function, comprising a base (1), characterized in that: The upper surface of the boss on the base (1) is fixedly connected to the guide rail body (2). The base (1) is symmetrically provided with cleaning components (3) on the left and right sides along the extension direction of the guide rail body (2); The cleaning component (3) includes: A fixed frame (301) is fixedly installed on the base (1) at its bottom and is set along the extension direction of the guide rail body (2); The drive mechanism includes a drive motor (302) fixed to one end of a fixed frame (301), whose output shaft is connected to a threaded rod (303) via a coupling. The moving mechanism includes a threaded sleeve (304) that is threaded to the threaded rod (303), the threaded sleeve (304) forming a sliding pair with the guide rod (306) on the fixed frame (301) through a limiting sleeve (305); The rotating cleaning mechanism includes brackets (307) symmetrically fixed to the top of the threaded sleeve (304), and a roller (308) rotatably mounted between the two brackets (307). A gear (309) is fixedly sleeved on the outer periphery of the roller (308) at the center position between the two brackets (307). A rack (310) meshes with one side of the gear (309), and the rack (310) is fixed on the fixed frame (301). The roller (308) is connected to the cleaning disc (409) via the connecting assembly (4), and the brush of the cleaning disc (409) is in contact with the working surface of the guide rail body (2).

2. The goods lift guide rail device with self-cleaning function according to claim 1, characterized in that: The connecting assembly (4) includes a first connecting shaft cylinder (401) and a second connecting shaft cylinder (402) symmetrically arranged on both sides thereon. One end of the first connecting shaft cylinder (401) is fixedly connected to the roller (308), and the other end is provided with a limiting block (403). The second connecting shaft cylinder (402) is provided with a limiting block (403) at the center of the end facing the first connecting shaft cylinder (401). The roller (308) and the second connecting shaft cylinder (402) are respectively provided with a block receiving cavity (404) that cooperates with the limiting block (403). The first connecting shaft cylinder (401) and the second connecting shaft cylinder (402) are symmetrically provided with assembly holes (405) at the center of the maximum contact surface. An insert shaft head (406) is inserted into the hole. One end of the insert shaft head (406) is connected to a fastening screw (407), and an auxiliary positioning component (408) is threaded on the fastening screw (407).

3. The goods lift guide rail device with self-cleaning function according to claim 1, characterized in that: The roller (308) is provided with a bearing (311) at its end, and a guide groove (312) for the bearing (311) to slide is provided on the fixed frame (301).

4. The goods lift guide rail device with self-cleaning function according to claim 1, characterized in that: The drive motor (302) is a servo motor.

5. The goods lift guide rail device with self-cleaning function according to claim 1, characterized in that: The brush of the cleaning disc (409) is made of a composite material of nylon and steel wire, and its bristle length is 1 to 3 mm longer than the recessed depth of the working surface of the guide rail body (2).

6. A freight elevator guide rail device with self-cleaning function according to claim 1, characterized in that: Hall sensors are installed at both ends of the fixed frame (301) to detect the extreme positions of the threaded sleeve (304).

7. The goods lift guide rail device having a self-cleaning function according to claim 3, characterized in that: The guide rail groove (312) is fitted with a self-lubricating bushing, and the bearing (311) is a deep groove ball bearing.

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