A chain deviation prevention mechanism for an elevator

Abstract

The utility model discloses a prevent chain from running off mechanism for elevator belongs to hoist equipment technical field, including fixed plate, the support rod of fixed connection in fixed plate and the limiting mechanism containing fixed axle and gyro wheel, still include quick -detach mechanism, and quick -detach mechanism contains support plate, and the fixed axle of limiting mechanism is fixedly connected on support plate, and the clamping groove that is cooperated with support rod is seted up on support plate, makes support plate can slide the sleeve setting on support rod. The utility model still preferably sets up elastic sheet to realize the self -adaptation of gyro wheel and is attached, sets up the bushing to reduce maintenance cost, through the quick -detach design of innovation, makes the replacement of gyro wheel and other vulnerable spare parts not to need complicated dismounting, and operation is very convenient, has significantly shortened the equipment downtime, has improved maintenance efficiency, has very high practical value.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, specifically to a mechanism for preventing chain deviation in hoists. Background Technology

[0002] Elevators, as important vertical material conveying equipment, are widely used in warehousing, logistics, and industrial production. Among them, chain elevators use a drive chain to move buckets or a supporting platform to lift materials, and the stable operation of the drive chain is key to ensuring the safety and efficiency of the equipment.

[0003] In actual operation, due to factors such as long drive chains, high operating speeds, or load variations, the chain may vibrate or oscillate laterally, resulting in a "deviation" phenomenon. This deviation not only exacerbates abnormal wear between the chain and sprockets and generates noise, but in severe cases, it can even cause the chain to detach from the sprocket, leading to equipment failure and safety accidents. Therefore, the industry typically installs anti-deviation mechanisms on both sides of the chain's running path, using guide wheels or rollers to forcibly limit the chain's movement trajectory.

[0004] However, existing anti-deviation mechanisms still have shortcomings in practical applications. Components such as guide rollers, as parts that come into direct contact with the high-speed running chain, need to withstand continuous friction and impact, making them typical wear parts. With increased use, these components wear down, leading to a decrease in their limiting effect, requiring regular inspection and replacement. In traditional structures, these guide components are usually directly fixed to the hoist frame or support structure using bolts or other fasteners, resulting in a relatively fixed and integrated structure.

[0005] This method of fastening means that during maintenance and replacement, operators must disassemble multiple fasteners within a confined space, a tedious and time-consuming process. After worn parts are removed and replaced with new ones, complex alignment and tightening operations must be performed again. This not only significantly increases the labor intensity of maintenance work but, more importantly, prolongs equipment downtime for repairs, directly impacting the operational efficiency of the entire production or logistics system.

[0006] Therefore, this utility model proposes a chain deviation prevention mechanism for hoists to overcome the shortcomings of the prior art. Summary of the Invention

[0007] In view of the problems of cumbersome replacement process of guide vulnerable parts, need to disassemble multiple fixing bolts, long equipment maintenance downtime and low work efficiency in the existing anti-chain deviation mechanism for hoists, this utility model aims to provide an improved anti-chain deviation mechanism for hoists that can effectively solve the above problems.

[0008] This utility model provides a chain anti-deviation mechanism for a hoist, comprising: a fixed plate, a support rod fixedly connected to the fixed plate, and a limiting mechanism including a fixed shaft and a roller rotatably connected to the fixed shaft; and a quick-release mechanism including the support plate.

[0009] The quick-release mechanism is the core innovation of this solution. It achieves rapid assembly and disassembly of the limiting mechanism through a unique combination of sliding fit and quick locking structure. Specifically, the support plate has a slot that matches the shape of the support rod, allowing the support plate, which holds the entire limiting mechanism, to slide onto the support rod.

[0010] Furthermore, the quick-release mechanism also includes a set of components for locking the sliding state: a long rod, a bolt, and a locking block. The long rod is pluggably inserted into the support plate and is tangential to or abuts against the support rod. The bolt is radially inserted into the support plate and its end abuts against the side wall of the long rod, locking the long rod with friction. The locking block is detachably installed at the end of the long rod. This combination of "sliding fit, rod-through limiting, bolt locking, and locking block anti-disengagement" formed by the support plate, support rod, long rod, bolt, and locking block constitutes the basis of the quick-release function of this utility model.

[0011] Preferably, the limiting mechanism further includes an elastic plate, one end of which is fixedly connected to the support rod, and the other end of which elastically abuts against the fixed shaft. The elastic plate continuously pushes the fixed shaft and the roller toward the transmission chain using its own elastic force, so that the roller can always fit tightly against the chain, achieving adaptive flexible limiting and effectively compensating for gaps caused by vibration or wear.

[0012] Preferably, the support rod has multiple positioning holes along its length. The design of these positioning holes allows the fixed shaft to be installed in different hole positions according to actual needs, thereby flexibly adjusting the installation height or front and rear position of the limiting mechanism to adapt to different specifications of transmission chains or rollers, enhancing the versatility of the entire mechanism.

[0013] Preferably, an independently replaceable bushing is rotatably fitted inside the inner hole of the roller. The bushing surrounds the outer circumference of the fixed shaft and serves as the main wear interface between the roller and the fixed shaft. When wear occurs, only the low-cost bushing needs to be replaced, instead of replacing the entire roller, which greatly reduces the long-term maintenance cost of the equipment.

[0014] Preferably, the mechanism further includes a connecting rod, one end of which is fixedly connected to the end of the support rod away from the fixed plate, providing additional structural reinforcement to the entire extended mechanism and improving its rigidity and stability.

[0015] Preferably, in the above-mentioned scheme including the connecting rod, a nut is also included. The lower part of the fixed shaft passes through the through hole on the connecting rod, and the nut is threaded to the end of the fixed shaft and abuts against the bottom surface of the connecting rod, providing a second support point for the fixed shaft and effectively preventing the fixed shaft from bending or deflecting when subjected to lateral forces.

[0016] Preferably, the long rod is a cylindrical rod, and the axis of the bolt is perpendicular to its axis. This arrangement allows the end of the bolt to generate a concentrated radial pressure on the cylindrical sidewall of the long rod when the bolt is tightened, thereby achieving a stable and reliable friction locking effect.

[0017] Preferably, the locking block is a U-shaped locking block, and a ring groove is provided at the end of the long rod to cooperate with it. This locking structure of U-shaped locking block and ring groove provides a simple and reliable axial anti-disengagement method, which is convenient to operate and not easy to lose.

[0018] Preferably, in the actual application of the hoist, the anti-chain deviation mechanism is symmetrically installed on both the upper and lower running sections of the transmission chain. Through this dual and symmetrical arrangement, the entire running loop of the transmission chain can be provided with comprehensive and continuous guidance and limiting, ensuring the highest stability of the hoist operation.

[0019] The beneficial effects of this utility model are as follows: 1. This utility model, by setting up a quick-release mechanism composed of components such as a support plate, a slot, a long rod, bolts, and a locking block, enables the limiting mechanism to be quickly disassembled and installed from the support rod in a sliding manner. This solves the problem that the replacement of vulnerable parts of the anti-deviation mechanism in the prior art requires complex disassembly and takes too long, thus achieving the technical effect of significantly improving maintenance efficiency and shortening equipment downtime.

[0020] 2. This utility model solves the problem of failure caused by increased limit gap due to chain vibration, component manufacturing tolerances, or wear, by setting an elastic sheet between the support rod and the fixed shaft and using its elastic force to continuously push the roller to stick to the transmission chain. It achieves the technical effect of enabling the limit mechanism to self-compensate and always maintain effective guiding function.

[0021] 3. This utility model solves the problem of easy wear and high replacement cost of the roller body when the roller is in direct contact with the fixed shaft by setting an independently replaceable bushing in the inner hole of the roller. It achieves the technical effect of concentrating the main wear on the low-cost bushing, thereby reducing long-term maintenance costs.

[0022] 4. This utility model solves the problem that a single fixed position cannot accommodate chains or rollers of different specifications by opening multiple positioning holes on the support rod, and achieves the technical effect of making the installation position of the entire anti-deviation mechanism flexibly adjustable, thereby enhancing its versatility and applicability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0024] Figure 1 This is a front view of a chain anti-deviation mechanism for a hoist, according to one embodiment of the present invention. Figure 2 This is a perspective view of a chain anti-deviation mechanism for a hoist, according to one embodiment of the present invention. Figure 3 This is a partial structural schematic diagram of a chain anti-deviation mechanism for a hoist in one embodiment of the present invention; Figure 4 This is a partial structural diagram of a chain anti-deviation mechanism for a hoist, according to one embodiment of the present invention. In the diagram: 1. Transmission chain; 2. Limiting mechanism; 201. Fixing plate; 202. Fixing shaft; 203. Bushing; 204. Roller; 205. Connecting rod; 206. Support rod; 207. Elastic sheet; 3. Quick release mechanism; 301. Support plate; 302. Long rod; 303. Bolt; 304. Slot; 305. Locking block; 306. Positioning hole; 307. Nut. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0026] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Example

[0031] Please refer to Figures 1 to 4 This utility model provides a chain anti-deviation mechanism for a hoist, which aims to solve the problems of complex replacement of vulnerable parts and low maintenance efficiency in the existing anti-deviation mechanism.

[0032] like Figure 1 and Figure 2 As shown, the overall basic frame of a chain anti-deviation mechanism for a hoist includes a fixed plate 201 and a support rod 206 fixedly connected to the fixed plate 201. The mechanism also includes a limiting mechanism 2 for guiding and limiting the transmission chain 1 and a quick-release mechanism 3 for quickly assembling and disassembling the limiting mechanism 2. Specifically, the limiting mechanism 2 includes a fixed shaft 202 and a roller 204 rotatably connected to the fixed shaft 202; the quick-release mechanism 3 includes a support plate 301, and the fixed shaft 202 of the limiting mechanism 2 is fixedly connected to the support plate 301 of the quick-release mechanism 3, so that the limiting mechanism 2 and the quick-release mechanism 3 are integrated into a detachable module. To enable quick disassembly, the support plate 301 is provided with a slot 304 that matches the shape of the support rod 206. The support plate 301 is slidably sleeved on the support rod 206 through the slot 304, so that it can be installed or disassembled along the axial direction of the support rod 206. To stably lock the support plate 301 onto the support rod 206 during operation, the quick-release mechanism 3 also includes a locking structure. The locking structure includes a long rod 302, a bolt 303, and a locking block 305. The long rod 302 is inserted into the support plate 301 and, after being installed in place, is tangential to or abuts against the surface of the support rod 206. At this time, the bolt 303 is radially inserted into the support plate 301, with its end abutting against the side wall of the long rod 302. Tightening the bolt 303 locks the long rod 302 through friction, thereby indirectly fixing the position of the support plate 301 and preventing it from sliding along the support rod 206. To further prevent the long rod 302 from accidentally coming off, the locking block 305 is detachably installed at the end of the long rod 302, which serves to axially limit the long rod 302.

[0033] To ensure that the roller 204 always fits tightly against the transmission chain 1 to compensate for chain vibration or component wear, the limiting mechanism 2 also includes an elastic plate 207. One end of the elastic plate 207 is fixedly connected to the support rod 206, and the other end abuts against the outer surface of the fixed shaft 202. When the limiting mechanism 2 is installed in place, the elastic plate 207 will undergo elastic deformation, and through its continuous elastic force, it will push the fixed shaft 202 and the roller 204 rotatably connected to it to always face the transmission chain 1, thereby achieving a flexible and adaptive limiting effect. To accommodate different models of transmission chains 1 or rollers 204 and improve the versatility of the mechanism, multiple positioning holes 306 are provided on the support rod 206 along its axial direction. These positioning holes 306 are used to selectively engage with the fixed shaft 202 or the fasteners that cooperate with it. By selecting different positioning holes 306 for installation, the installation height or front and rear position of the limiting mechanism 2 on the support rod 206 can be easily adjusted. To improve durability and reduce maintenance costs, a replaceable bushing 203 is rotatably fitted in the inner hole of the roller 204. The bushing 203 surrounds the outer circumference of the fixed shaft 202 and serves as a rotating bearing between the roller 204 and the fixed shaft 202. During long-term use, wear will mainly be concentrated on the lower-cost bushing 203. When replacing it, only the bushing 203 needs to be replaced, without replacing the entire roller 204.

[0034] As a preferred embodiment, in order to enhance the overall rigidity and connection stability of the mechanism, a connecting rod 205 is fixedly connected to the end of the support rod 206 away from the fixed plate 201. The connecting rod 205 has a plate-like structure, with one end fixed perpendicularly to the end face of the support rod 206 and the other end extending outward. For further optimization of the aforementioned connecting rod 205 structure, please refer to... Figure 1 The mechanism also includes a nut 307. The lower part of the fixed shaft 202 passes through a through hole in the connecting rod 205. The nut 307 is threaded to the threaded end of the fixed shaft 202 exposed below the connecting rod 205, and abuts against the bottom surface of the connecting rod 205 by tightening, thereby providing an additional support point for the fixed shaft 202 and preventing it from deflecting when subjected to force. As a preferred embodiment, in order to achieve bidirectional limiting on both sides of the transmission chain 1, the limiting mechanism 2 includes two sets of rollers 204. Both sets of rollers 204 are rotatably connected to the same fixed shaft 202 and are located on the front and rear sides of the transmission chain 1 respectively, forming a guide channel that can accommodate the transmission chain 1. As a specific implementation of the locking structure in the quick-release mechanism 3, the long rod 302 is a cylindrical rod, and the axis of the bolt 303 is perpendicular to the axis of the long rod 302. When the bolt 303 is tightened, its end will generate a radial pressure on the cylindrical side wall of the long rod 302. The long rod 302 is reliably locked by the static friction between the two contact surfaces. As a specific implementation of the anti-drop structure in the quick-release mechanism 3, the locking block 305 is a U-shaped locking block 305. A ring groove is provided at the end of the long rod 302 to cooperate with it. By locking the open end of the U-shaped locking block 305 into the ring groove, the long rod 302 can be effectively prevented from sliding out axially from the support plate 301, thus ensuring the safety of the mechanism. As a preferred application method, please refer to Figure 1 On both the upper and lower running sections of the transmission chain 1, anti-chain deviation mechanisms are symmetrically installed. Through the coordinated action of the two sets of mechanisms, comprehensive and stable dual limits can be provided for the entire running stroke of the transmission chain 1.

[0035] Working principle: During normal operation, the transmission chain 1 of the hoist passes between two sets of rollers 204. Under the continuous elastic force of the elastic plate 207, the outer edge of the roller 204 always keeps in close contact with the front and rear sides of the transmission chain 1. When the transmission chain 1 tends to deviate due to uneven force or vibration, its sides will be immediately blocked and guided by the rollers 204. Since the rollers 204 are rotatably connected to the fixed shaft 202, they will roll in the running direction of the transmission chain 1, replacing sliding friction with rolling friction, thereby constraining the transmission chain 1 to the correct running trajectory without increasing too much running resistance. When it is necessary to inspect or replace worn rollers 204 or bushings 203, the maintenance process is as follows: First, loosen bolt 303 so that its end is no longer in contact with long rod 302. Then, remove the locking block 305 from the end of long rod 302. At this point, long rod 302 is no longer locked and can be completely pulled out of support plate 301 along its axial direction. Next, loosen and remove bottom nut 307 to release its support to fixed shaft 202. After completing these unlocking steps, the entire support plate... The limiting mechanism 2 module, composed of 301, fixed shaft 202, roller 204, bushing 203, etc., can smoothly slide outward along the axial direction of the support rod 206 using the slot 304 on the support plate 301 as a guide rail, thus achieving quick disassembly of the entire limiting mechanism 2. After replacing worn parts, the module can be slid into the support rod 206 in the reverse order and locked in sequence. The entire process does not require disassembly of basic components such as the fixed plate 201 or support rod 206, making operation convenient.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A chain deviation prevention mechanism for a hoist, comprising a fixed plate (201) and a support rod (206) fixedly connected to the fixed plate (201), the chain deviation prevention mechanism for a hoist further comprising a limiting mechanism (2) for limiting the transmission chain (1), the limiting mechanism (2) comprising a fixed shaft (202) and a roller (204) rotatably connected to the fixed shaft (202), characterized in that, The chain anti-deviation mechanism also includes a quick-release mechanism (3), which includes a support plate (301). The fixed shaft (202) is fixedly connected to the support plate (301). The support plate (301) has a slot (304) that matches the shape of the support rod (206). The support plate (301) is slidably fitted onto the support rod (206) through the slot (304). The quick-release mechanism (3) also includes a long rod (302). The long rod (302) is inserted into the support plate (301) and is tangential to or abuts against the support rod (206); the quick-release mechanism (3) further includes a bolt (303) and a locking block (305) for locking the long rod (302), the bolt (303) is radially inserted into the support plate (301) and its end abuts against the side wall of the long rod (302), and the locking block (305) is detachably installed at the end of the long rod (302) to restrict its axial pull-out.

2. The chain deviation prevention mechanism for a hoist according to claim 1, characterized in that, The limiting mechanism (2) also includes an elastic sheet (207), one end of which is fixedly connected to the support rod (206), and the other end abuts against the fixed shaft (202), and pushes the fixed shaft (202) and the roller (204) to always face the transmission chain (1) through its elastic force.

3. The chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The support rod (206) has multiple positioning holes (306) for selectively engaging with the fixed shaft (202) or a fastener thereto, so as to adjust the installation position of the limiting mechanism (2).

4. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, A bushing (203) is rotatably fitted in the inner hole of the roller (204), and the bushing (203) surrounds the outer periphery of the fixed shaft (202).

5. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The end of the support rod (206) away from the fixed plate (201) is fixedly connected to a connecting rod (205).

6. A chain misalignment prevention mechanism for a hoist according to claim 5, characterized in that, The mechanism also includes a nut (307), the lower part of the fixed shaft (202) passes through a through hole on the connecting rod (205), the nut (307) is threaded to the end of the fixed shaft (202) and abuts against the bottom surface of the connecting rod (205).

7. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The limiting mechanism (2) includes two sets of rollers (204), which are rotatably connected to the fixed shaft (202) and located on the front and rear sides of the transmission chain (1).

8. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The long rod (302) is a cylindrical rod body. The axis of the bolt (303) is perpendicular to the axis of the long rod (302). After the bolt (303) is tightened, it generates radial pressure on the long rod (302) through its end, thereby achieving friction locking.

9. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The locking block (305) is a U-shaped locking block (305), and the end of the long rod (302) is provided with a ring groove. The locking block (305) is inserted into the ring groove to prevent the long rod (302) from accidentally sliding out of the support plate (301).

10. A chain misalignment prevention mechanism for a hoist according to claim 1, characterized in that, The transmission chain (1) is equipped with the anti-chain deviation mechanism on both the upper and lower sides to double limit the entire stroke of the transmission chain (1) during the operation of the hoist.

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