Anti-falling mechanism of hoist chain

Abstract

This utility model discloses a chain anti-fall mechanism for a hoist, including a mounting base. One end of the mounting base is provided with a sprocket, a mounting groove, and a fixing seat. There are two sets of mounting grooves, which are located on both sides of one end of the mounting base. A chain is provided on the outer side of the sprocket. A vertical rack plate is provided at the bottom inside the fixing seat. A rotating shaft is fitted inside the two mounting grooves, and a toothed disc and a rotating plate are respectively provided on the outer side of the rotating shaft. This utility model, through the cooperation of the mounting groove and the fixing seat structure on the end face of the mounting base, facilitates real-time monitoring of the tension transmitted by the contact chain using the first tension detection wheel and the second tension detection wheel inside the mounting groove and the fixing seat. Thus, when the chain fails, the tension detection device can quickly determine that the chain has a problem and automatically control the two sets of locking blocks to unfold outward, thereby contacting and locking the inner side of the chain, effectively preventing the chain from falling.

Description

Technical Field

[0001] This utility model relates to the field of hoist chain technology, specifically a hoist chain anti-fall mechanism. Background Technology

[0002] In many fields such as industrial production, mining, and construction, the elevator is the core equipment for vertical or inclined material conveying. Its operational stability and safety are directly related to production efficiency and the safety of personnel and property. In the transmission and load-bearing system of the elevator, the chain, with its advantages of high strength, wear resistance, and adaptability to harsh working conditions, has become a key transmission element connecting the drive device and the material-bearing components. It is widely used in various equipment such as bucket elevators and scraper elevators.

[0003] Authorization announcement number CN214494647U discloses a novel anti-fall system for a chain-type elevator. This device primarily works by maintaining a vertical position of the chain connecting block under normal conditions, under the influence of chain tension and the weight of the lifted material, compressing the spring. The anti-fall pin on the other side is tilted, precisely avoiding the anti-fall locking hole on the column, and the mechanism operates normally. When the chain breaks, the chain tension and the pulling force on the load disappear. At this time, the spring force is released, and the chain connecting block rotates under the action of the spring force. The pin then inserts into the anti-fall locking hole, stopping the material from falling. However, in actual use, the device still has the following drawbacks:

[0004] The aforementioned patents mainly prevent the chain from falling by setting up anti-fall structures. However, during chain conveying, it is difficult to judge the faults in the chain conveying process, and it is difficult to stop the machine and handle abnormalities in a timely manner. Furthermore, when the chain fails or breaks, the chain body will directly detach from the sprocket, which will cause the chain structure of the hoist to fall, reducing the safety protection effect of the chain. Utility Model Content

[0005] The purpose of this utility model is to provide a mechanism to prevent the chain of a hoist from falling, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hoist chain anti-fall mechanism, including a mounting base, one end of which is provided with a sprocket, a mounting groove and a fixing seat, two sets of mounting grooves, the two mounting grooves being arranged on both sides of one end of the mounting base, a chain being provided on the outer side of the sprocket, a vertical rack plate being provided at the bottom inside the fixing seat, a rotating shaft being sleeved inside the two mounting grooves, and a gear plate and a rotating plate being provided on the outer side of the rotating shaft, and a guide wheel and a locking rod being provided on the outer side of the two rotating plates;

[0007] A motor is located at the center of the bottom of the fixed base. The output end of the motor is equipped with a rotating rod. One end of the vertical rack plate is equipped with a horizontal rack plate. A gear is located on the outer side of the rotating rod, and the gear meshes with the horizontal rack plate. A first tension detection wheel is located at the four corners of the fixed base. A bidirectional threaded rod is sleeved at the center of the fixed base. A bevel gear set meshing with the top of the rotating rod and the outer side of the bidirectional threaded rod is provided. A matching internal threaded tube is symmetrically provided on the outer side of the bidirectional threaded rod. A locking block is provided on the side of the two internal threaded tubes that are far apart from each other. A second tension detection wheel is located inside the two mounting slots.

[0008] Preferably, the first tension detection wheel is in contact with one side of the chain, and the second tension detection wheel is in contact with the other side of the chain, which facilitates the detection of the tension force conveyed by the chain and the active control of the anti-fall structure based on the detected tension force.

[0009] Preferably, the two guide wheels and the locking rods are respectively staggered on the outer wall of the rotating plate. The two guide wheels are guided and cooperate with the chain, and the two locking rods are fixedly cooperated with the outer side of the chain. This facilitates the integrated arrangement of the guiding structure and the positioning structure, and allows for free adjustment according to requirements.

[0010] Preferably, the fixed base has limiting grooves on both sides, and the two locking blocks move horizontally inside the limiting grooves. The two locking blocks are fixedly engaged with the inner side of the chain, which facilitates locking and fixing the rack and prevents it from falling off.

[0011] Preferably, a through groove is provided on the side of the two mounting slots that are close to each other, and the two rotating plates can move at an angle inside the through groove, so that the rotating plates can extend out of the through groove and release the guide or position of the chain.

[0012] Preferably, the vertical rack plate and the horizontal rack plate are integrally connected, wherein the horizontal rack plate at the horizontal end meshes with a gear, and the vertical rack plate at the vertical end meshes with a gear disk, which facilitates synchronous drive structure meshing and linkage, thereby enabling the two sets of rotating plates to adjust and rotate.

[0013] The hoist chain anti-fall mechanism proposed in this utility model has at least the following beneficial effects:

[0014] The mounting groove on the end face of the mounting base and the fixed base structure work together to facilitate real-time monitoring of the tension transmitted by the contact chain using the first and second tension detection wheels within the mounting groove and fixed base. This allows for rapid identification of the chain problem when a chain malfunctions, and automatic control to unfold the two sets of locking blocks outwards, engaging the inner side of the chain. Simultaneously, it drives the horizontal and vertical rack plates to shift horizontally, causing the two sets of rotating plates to rotate synchronously. This changes the position of the guide wheel and locking lever, causing the guide wheel of the normally guided structure to disengage from the chain's contact surface, and instead, the locking mechanism of the locking lever contacts and positions the outer side of the chain. The synchronous adjustment and multi-stage fixing structure of the structure enable rapid chain positioning, and the secure fixation effectively prevents the chain from falling. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 This is a rear sectional view of the present invention;

[0018] Figure 4 For the present utility model Figure 2 An enlarged schematic diagram of the structure at point A.

[0019] In the diagram: 1. Mounting base; 2. Sprocket; 3. Mounting groove; 4. Chain; 5. Fixing base; 6. Vertical rack plate; 7. Rotating shaft; 8. Gear disc; 9. Rotating plate; 10. Guide wheel; 11. Clamping rod; 12. Motor; 13. Gear; 14. Horizontal rack plate; 15. First tension detection wheel; 16. Rotating rod; 17. Bevel gear set; 18. Double-threaded rod; 19. Internal threaded tube; 20. Clamping block; 21. Second tension detection wheel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0021] Please see Figure 1-4The present invention provides an embodiment of a hoist chain anti-fall mechanism, comprising a mounting base 1, one end of which is provided with a sprocket 2, a mounting groove 3 and a fixing base 5, two sets of mounting grooves 3, the two mounting grooves 3 being provided on both sides of one end of the mounting base 1, a chain 4 being provided on the outer side of the sprocket 2, a vertical rack plate 6 being provided at the bottom inside the fixing base 5, a rotating shaft 7 being fitted inside the two mounting grooves 3, and a gear plate 8 and a rotating plate 9 being provided on the outer side of the rotating shaft 7, a guide wheel 10 and a locking rod 11 being provided on the outer side of the two rotating plates 9, a through groove being provided on the side of the two mounting grooves 3 that are close to each other, and the two rotating plates 9 being angularly movable inside the through groove, so that the rotating plates 9 can extend out of the through groove and release the guide or position of the chain 4;

[0022] A motor 12 is located at the middle of the bottom of the fixed base 5. A rotating rod 16 is located at the output end of the motor 12. A horizontal rack plate 14 is located at one end of the vertical rack plate 6. A gear 13 is located on the outside of the rotating rod 16, and the gear 13 meshes with the horizontal rack plate 14. A first tension detection wheel 15 is located at the four corners inside the fixed base 5. The vertical rack plate 6 and the horizontal rack plate 14 are integrated. The horizontal rack plate 14 at the horizontal end meshes with the gear 13, and the vertical rack plate 6 at the vertical end meshes with the gear disk 8, which facilitates the synchronous drive structure meshing and linkage, thereby adjusting the rotation of the two sets of rotating plates 9.

[0023] A bidirectional threaded rod 18 is fitted inside the middle position of the fixed base 5. A bevel gear set 17 meshes with the top of the outer side of the rotating rod 16 and the outer side of the bidirectional threaded rod 18. A matching internal threaded tube 19 is symmetrically provided on the outer side of the bidirectional threaded rod 18. A locking block 20 is provided on the side of the two internal threaded tubes 19 that are far apart from each other. A second tension detection wheel 21 is provided inside the two mounting grooves 3. Limiting grooves are opened on both sides inside the fixed base 5. The two locking blocks 20 are horizontally displaced inside the limiting grooves. The two locking blocks 20 are fixedly engaged with the inner side of the chain 4 to facilitate locking and fixing the chain 4 and prevent it from falling off.

[0024] Example 1, such as Figure 1-4 As shown, the first tension detection wheel 15 contacts one side of the chain 4, and the two second tension detection wheels 21 contact the other side of the chain 4. Through the contact between the first tension detection wheel 15 and the inner side of the chain 4 and the contact between the second tension detection wheel 21 and the outer side of the chain 4, the chain 4 is continuously pressure-detected during transmission. When a structural problem occurs, the observed pressure is used to automatically activate the anti-fall positioning structure after the specified threshold is lost, thereby fixing the chain and preventing it from falling.

[0025] Example 2, as Figure 1-4As shown, two guide wheels 10 and two locking rods 11 are respectively staggered on the outer wall of the rotating plate 9. The two guide wheels 10 are guided and engaged with the chain 4, and the two locking rods 11 are fixedly engaged with the outer side of the chain 4. The staggered guide wheels 10 contact the chain 4 to assist the chain 4 in guiding and conveying. When the chain falls off, the two sets of locking rods 11 can be simultaneously engaged into the outer side of the chain 4 through the synchronous adjustment of the structure to prevent the chain 4 from falling.

[0026] Working principle: This is the chain anti-fall mechanism of the hoist;

[0027] By setting two sets of mounting slots 3 and fixing seats 5 in the conveying path of chain 4, and installing anti-fall positioning structures in both mounting slots 3 and fixing seats 5, it is convenient to use four sets of first tension detection wheels 15 and two sets of second tension detection wheels 21 to detect the pressure of chain 4 when it is working. When the detected pressure is not met, it can be determined that the chain has failed, and the motor 12 will be automatically started. The motor 12 will drive the rotating rod 16, the gear 13 and the bevel gear set 17 to rotate. At this time, when the gear 13 rotates, it meshes with the horizontal rack plate 14. This causes the horizontal rack plate 14 to drive the vertical rack plate 6 to move horizontally, and the vertical rack plate 6 to drive the two sets of gear discs 8 to mesh. This causes the gear discs 8 to drive the rotating shaft 7 and the rotating plate 9 to rotate and adjust their angles, so that the locking rod 11 on the outer side of the rotating plate 9 can be locked into the outer side of the chain 4 for fixation. The meshing of the bevel gear set 17 facilitates the rotation of the bidirectional threaded rod 18, causing the bidirectional threaded rod 18 to drive the two sets of internal threaded tubes 19 and the locking block 20 to unfold outward, thereby locking and positioning the inner side of the chain 4, preventing the chain 4 from falling off as a whole, and increasing the safety protection function of the chain 4.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A hoist chain anti-fall mechanism, comprising a mounting base (1), characterized in that: One end of the mounting base (1) is provided with a sprocket (2), a mounting groove (3) and a fixed base (5). The mounting groove (3) is provided in two sets, and the two mounting grooves (3) are located on both sides of one end of the mounting base (1). The outer side of the sprocket (2) is provided with a chain (4). The bottom of the fixed base (5) is provided with a vertical rack plate (6). The two mounting grooves (3) are fitted with a rotating shaft (7), and the outer side of the rotating shaft (7) is provided with a gear plate (8) and a rotating plate (9). The outer side of the two rotating plates (9) is provided with a guide wheel (10) and a locking rod (11). A motor (12) is provided at the middle position of the bottom of the fixed base (5). A rotating rod (16) is provided at the output end of the motor (12). A horizontal rack plate (14) is provided at one end of the vertical rack plate (6). A gear (13) is provided on the outside of the rotating rod (16), and the gear (13) meshes with the horizontal rack plate (14). A first tension detection wheel (15) is provided at the four corners of the fixed base (5). A bidirectional threaded rod (18) is sleeved at the middle position of the fixed base (5). A bevel gear set (17) meshes with the top of the rotating rod (16) and the outside of the bidirectional threaded rod (18). A matching internal threaded tube (19) is symmetrically provided on the outside of the bidirectional threaded rod (18). A locking block (20) is provided on the side of the two internal threaded tubes (19) that are far apart from each other. A second tension detection wheel (21) is provided inside the two mounting slots (3).

2. The hoist chain anti-fall mechanism according to claim 1, characterized in that: The first tension detection wheel (15) is in contact with one side of the chain (4), and the second tension detection wheel (21) is in contact with the other side of the chain (4).

3. The hoist chain anti-fall mechanism according to claim 1, characterized in that: The two guide wheels (10) and the locking rods (11) are respectively staggered on the outer wall of the rotating plate (9). The two guide wheels (10) are guided and engaged with the chain (4), and the two locking rods (11) are fixedly engaged with the outer side of the chain (4).

4. The hoist chain anti-fall mechanism according to claim 1, characterized in that: The fixed base (5) has limiting grooves on both sides inside. The two locking blocks (20) are horizontally displaced inside the limiting grooves. The two locking blocks (20) are fixedly engaged with the inner side of the chain (4).

5. The hoist chain anti-fall mechanism according to claim 1, characterized in that: The two mounting slots (3) are provided with through slots on the side that are close to each other, and the two rotating plates (9) move at an angle inside the through slots.

6. The hoist chain anti-fall mechanism according to claim 1, characterized in that: The vertical rack plate (6) and the horizontal rack plate (14) are integrally connected, wherein the horizontal rack plate (14) at the horizontal end meshes with the gear (13), and the vertical rack plate (6) at the vertical end meshes with the gear disc (8).

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