Large guide wheel device for elevator

Abstract

The utility model discloses a large-scale guide wheel device for an elevator, which comprises a traveling wheel and a fixed wheel which penetrate through a main shaft, the traveling wheel and the fixed wheel are of split structures, the peripheral edge of a hub is provided with a swallow-tail-shaped protruding part, the lower ends of spokes are respectively welded and fixed on the outer side surfaces of the two ends of the swallow-tail-shaped protruding part of the hub, and the lower ends of the spokes are fixed on the outer side surfaces of the two ends of the swallow-tail-shaped protruding part of the hub. Annular grooves are symmetrically formed in the side faces of the two ends, close to the inner side of the hub, of the protruding part of the hub of the fixed wheel, and interference lantern rings are symmetrically arranged in the grooves. The guide wheel device is scientific and reasonable in design and compact in structure, the split structure of the movable wheel and the fixed wheel is beneficial to machining of the guide wheel device with the large size, the interference lantern ring and the fastening plate are fixedly combined through bolts, double connection protection on the two half hubs is formed, the overall connection work intensity of the split type hub of the fixed wheel is enhanced, and the service life of the guide wheel device is prolonged. The compact bearing mounting structure and the bearing bush inclination design prolong the service life of the bearing and ensure the stable operation of the guide wheel device.

Description

A large guide wheel device for a hoist Technical Field

[0001] This utility model belongs to the field of hoisting technology, specifically relating to a large guide wheel device for hoists. Background Technology

[0002] A hoist is a common lifting device widely used in industrial and mining enterprises such as chemical, metallurgical, cement, mining, and power plants. It consists of multiple ropes, a main pulley, and guide pulleys. Through the coordinated work of the ropes, it achieves the lifting and transportation of goods. The main pulley is the drive pulley of the ropes, powered by an electric motor and reducer, causing the ropes to rotate and lifting the load. The guide pulley, a key component of the hoist, is equipped with guide pulleys. Its main function is to create a wrap angle between the wire rope and the friction wheel, thereby maximizing the hoist's maximum lifting force, increasing the safety anti-slip coefficient, and increasing the static tension of the wire rope on the lightly loaded side of the friction wheel. The structure and safety condition of the guide pulley play a crucial role in the performance and safety of the hoist.

[0003] The guide wheel structure consists of three parts: the wheel body, the shaft, and the bearings. Its main function is to guide and fix the direction of the lifting rope, keeping the rope stable and preventing it from deviating from the track, thus ensuring stable rope movement. For large guide wheel devices, when the wheel diameter is too large, a two-part hub structure is often used, typically fixed by bolts. This requires multiple sets of bolts, resulting in lower strength at the hub's connection point. This can easily lead to instability in the guide wheel structure, increased vibration during operation, and severe swaying during operation. It can also cause wear on the main shaft and looseness in the bearings. Therefore, it is urgent to design and improve the guide wheel structure to ensure the stable operation of the guide wheel device. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a large guide wheel device for a hoist. It employs a split structure, using a combination of interference-fit collars and bolts for fixing, forming a double connection and protection between the two halves of the hub. The compact bearing installation structure facilitates the processing of the large guide wheel, strengthens the overall connection strength of the split-structure hub, avoids problems such as large vibrations during guide wheel operation and easy wear of the main shaft, improves the operational stability of the large guide wheel, and helps extend the service life of the guide wheel.

[0005] The technical solution adopted by this utility model is as follows: a large guide wheel device for a hoist, including a floating wheel and a fixed wheel arranged through the main shaft. The two ends of the main shaft are installed in bearing seats, and bearings are provided between the bearing seats and the main shaft. The main shaft is provided with a keyway. The fixed wheel is fixedly connected to the main shaft by a flat key. The inner hole of the floating wheel is fitted with a bearing bush. Both the floating wheel and the fixed wheel are of split structure. Both the fixed wheel and the floating wheel include a hub, a rim, and spokes. The outer peripheral edge of the hub is provided with a dovetail-shaped protrusion. The lower ends of the spokes are welded and fixed to the outer surfaces of the two ends of the dovetail-shaped protrusion of the hub, and are evenly distributed along the outer periphery of the hub. The upper ends of the spokes are circumferentially distributed and fixed to the rim. The two sides of the protrusion of the fixed wheel hub are symmetrically provided with annular grooves near the inner side of the hub. Interference rings are symmetrically arranged in the grooves.

[0006] Fastening plates are fixed at the mating surfaces of the two semi-circular wheel hubs, and the fastening plates are used to connect the two semi-circular split-structure wheel hubs into a whole wheel hub by bolts.

[0007] The bearing housing has an end cap at its outer end and an upper cover at its top. An oil injection hole is provided on the top of the upper cover near the floating wheel or fixed wheel of the bearing. A labyrinth seal is provided on the outer circumference of the main shaft sleeve near the floating wheel or fixed wheel of the bearing. Retaining rings are provided on both the inner and outer sides of the bearing to limit the bearing position.

[0008] A bushing is provided between the bearing and the main shaft. The mating surfaces of the bearing inner ring and the bushing are both inclined and fit together. The inclination of the bushing decreases from both ends of the shaft towards the inward side.

[0009] The groove is adapted to the structural dimensions of the interference fit ring.

[0010] The spokes are made of channel steel, and the sides of the two halves of the spokes are connected and fixed by steel plates. The sides of the spokes are A-shaped.

[0011] The rim is composed of two semi-circular structures spliced ​​together. A connecting plate is fixed at the joint of the two halves of the rim, and the connecting plate connects and fixes the two halves of the rim together by multiple sets of fastening bolts.

[0012] The connecting plate is a U-shaped structure with its openings flaring outwards on both sides, and the structure, shape, and size of the connecting plate match the rim.

[0013] The cross-section of the rim is a dovetail-shaped integral structure. A trapezoidal groove is opened at the bottom of the rim, and a wear-resistant liner is installed in the trapezoidal groove. An arc groove is opened in the middle of the top surface of the wear-resistant liner as a rope groove to place the rope. Bolts are provided along the rim axis and through the side of the rim to fix the wear-resistant liner to prevent the wear-resistant liner from moving radially.

[0014] The fixed wheel is fixedly connected to the main shaft by a flat key, and the inner hole of the floating wheel is equipped with a bearing to allow the floating wheel to rotate flexibly with the main shaft; the purpose of this setting is to eliminate the sliding friction of the rope groove caused by the speed difference of each lifting rope and avoid excessive wear of the wear-resistant liner.

[0015] Both the floating wheel and the fixed wheel have a split structure. The outer edge of the hub has a dovetail-shaped protrusion, and the two ends of the dovetail-shaped protrusion have symmetrical grooves near the inner side of the hub. Symmetrical interference rings are installed in the grooves. The purpose of this design is as follows: For large guide wheel devices with large structural dimensions, if the floating wheel and fixed wheel are made into two halves of the hub, the floating wheel is fixed by bolts connected to the fastening plate. If the fixed wheel were also fixed by bolts connected to the fastening plate, multiple sets of bolts would be required, resulting in low connection strength in the middle of the hub. This could easily lead to instability in the guide wheel structure, loosening of the main shaft, and wear. The fixed wheel is now fitted with an interference ring at each end of the two halves of the hub. The interference rings are press-fitted with the two halves of the hub, and after heat fitting, the two halves of the split hub are tightened together to form a single hub structure. This is then fixed by three bolts on the fastening plate. This double connection protection reduces the number of bolts on the fastening plate, ensures the overall connection strength and working strength of the hub, extends the service life of the hub, and improves the overall operational stability of the guide wheel device. At the same time, this structural design makes production and processing easier, reduces production difficulty, and shortens the production cycle.

[0016] The rim is composed of two semi-circular structures spliced ​​together. A connecting plate is fixed at the joint of the two halves of the rim. The connecting plate is connected and fixed to the two halves of the rim by multiple sets of fastening bolts. The purpose of this setting is to facilitate the assembly and processing of the rim and ensure its processing accuracy requirements.

[0017] A bushing is provided between the bearing and the main shaft. Both the bearing inner ring and the bushing have an angle and fit together. The angle of the bushing decreases from both ends of the shaft inwards. This design is intended to accommodate the high installation precision requirements of this guide wheel device. Due to the large size of the bushing and bearing inner ring, installation and disassembly would be significantly more difficult without the angle. The angled design makes it easier to insert the bushing into the bearing inner ring, acting as a guide during installation and reducing resistance and potential damage. During disassembly, the bushing can be removed from the bearing inner ring relatively easily, improving the convenience of maintenance and component replacement. The angled design better ensures the fitting precision between the bearing inner ring and the bushing, reducing wear and extending service life. During operation, heat is generated due to friction and other factors, causing thermal expansion of components. The coefficients of thermal expansion of the bushing and the inner ring of the bearing may be different. The tapered mating surface can compensate for this difference in thermal deformation to a certain extent, avoiding an excessively tight or loose fit due to thermal expansion. The tapered design also helps the flow and distribution of lubricating oil between the mating surfaces. The lubricating oil can enter the mating surface better along the tapered surface, forming a more uniform oil film, reducing friction and wear, improving the service life of the bearing, and ensuring the stable operation of the guide wheel device.

[0018] The beneficial effects of this utility model are as follows: The guide wheel device is scientifically and rationally designed with a compact structure. Both the floating wheel and the fixed wheel adopt a split structure of two halves, which is beneficial for the processing of guide wheel devices with larger dimensions. The combination of interference fit collar and fastening plate bolts forms a double connection protection for the two halves of the hub, which enhances the overall connection strength of the split hub. The compact bearing installation structure and bearing shell slope design improve the service life of the bearings, ensure the stable operation of the guide wheel device, and help extend the service life of the guide wheel device. Attached Figure Description

[0019] Figure 1 is a half-section schematic diagram of the overall structure of the guide wheel device of this utility model;

[0020] Figure 2 is a side view of the guide wheel device of this utility model;

[0021] Figure 3 is a partially enlarged structural diagram of the interference fit collar at point A of this utility model;

[0022] Figure 4 is a partially enlarged structural diagram of the bearing at point B of this utility model;

[0023] Figure 5 is a partial cross-sectional view of the rim at point C-C of this utility model.

[0024] The markings in the diagram are: 1. Floating wheel; 2. Fixed wheel; 3. Main shaft; 4. Bearing housing; 5. Bearing; 6. Hub; 7. Wheel rim; 8. Wheel spoke; 9. Protrusion; 10. Groove; 11. Interference fit ring; 12. Fastening plate; 13. End cover; 14. Top cover; 15. Oil injection hole; 16. Sealing ring; 17. Retaining ring; 18. Bushing; 19. Connecting plate; 20. Fastening bolt; 21. Trapezoidal groove; 22. Wear-resistant liner. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As shown in Figures 1-5, a large guide wheel device for a hoist includes a movable wheel 1 and a fixed wheel 2 that pass through a main shaft 3. Both ends of the main shaft 3 are installed in bearing seats 4. Bearings 5 ​​are provided between the bearing seats 4 and the main shaft 3. The main shaft 3 has a keyway. The fixed wheel 2 is fixedly connected to the main shaft 3 by a flat key. The movable wheel 1 has a bearing bush installed in its inner hole, which allows the movable wheel 1 to rotate flexibly between the movable wheel 1 and the main shaft 3. Both the movable wheel 1 and the fixed wheel 2 are split structures. Both the fixed wheel 1 and the movable wheel 2 include a hub 6, a rim 7 and spokes 8. The outer peripheral edge of the hub 6 has a dovetail-shaped protrusion 9. The lower ends of the spokes 8 are welded and fixed to the outer surfaces of the two ends of the dovetail-shaped protrusion 9 of the hub 6, and are evenly distributed along the outer periphery of the hub 6. The upper ends of the spokes 8 are circumferentially distributed and fixed to the rim 7. The two sides of the protrusion 9 of the hub 6 of the fixed wheel 2 are symmetrically provided with annular grooves 10 near the inner side of the hub 6. Interference rings 11 are symmetrically provided in the grooves 10.

[0027] Fastening plates 12 are fixedly installed at the mating surfaces of the two semi-circular hubs 6. The fastening plates 12 are used to connect the two semi-circular split hubs 6 into a whole hub 6 by bolts. After the two halves of the hub 6 are fixed by bolts through the fastening plates 12, the interference collar 11 is then heat-fitted into the groove 10 on the outer edge of the hub 6, that is, clamped to the outer circumference of the two halves of the hub 6, forming a whole hub structure with double connection strength protection, improving the overall working strength of the hub 6.

[0028] The bearing housing 4 has an end cap 13 at its outer end and an upper cover 14 at its top. An oil injection hole 15 is located on the top of the upper cover 14 near the floating wheel 1 or fixed wheel 2 of the bearing 5. A labyrinth seal ring 16 is fitted around the outer circumference of the main shaft 3 bushing near the floating wheel 1 or fixed wheel 2 of the bearing 5. Retaining rings 17 are provided on both the inner and outer sides of the bearing 5 to limit its position. A bushing 18 is provided between the bearing 5 and the main shaft 3. The mating surfaces of the inner ring of the bearing 5 and the bushing 18 are both inclined and mutually fitted. The inclination of the bushing 18 decreases from both ends of the main shaft 3 inwards, and the bushing taper can be set to 1:12. The bearing housing 4 and sealing structure are compactly and rationally designed, forming a more uniform oil film, reducing friction and wear, improving the service life of the bearing 5, and ensuring the stable operation of the guide wheel device.

[0029] The spokes 8 are channel steel, and the sides of the two halves of spokes 8 are connected and fixed by steel plates. The sides of spokes 8 are A-shaped.

[0030] The rim 7 is composed of two semi-circular structures spliced ​​together. A connecting plate 19 is fixed at the joint of the two halves of the rim 7. The connecting plate 19 is connected and fixed to the two halves of the rim 7 by multiple sets of fastening bolts 20. The connecting plate 19 is a U-shaped structure with the openings on both sides flaring outwards. The structure, shape and size of the connecting plate 19 match the rim 7.

[0031] The cross-section of the rim 7 is a dovetail-shaped integral structure. A trapezoidal groove 21 is provided at the bottom of the rim 7. A wear-resistant liner 22 is installed in the trapezoidal groove 21. An arc groove is provided in the middle of the top surface of the wear-resistant liner 22 as a rope groove to place the rope. Bolts are provided along the axial direction of the rim 7 and through the side of the rim 7 to fix the wear-resistant liner 22 to prevent the wear-resistant liner 22 from moving radially.

[0032] During operation, the guide wheel device consists of a floating wheel 1 and a fixed wheel 2. The fixed wheel 2 rotates synchronously with the main shaft 3. The hub 6 of the fixed wheel 2 is connected to the main shaft 3 via a key to ensure the stability of power transmission. The rotation of the main shaft 3 drives the hub 6 to rotate, which in turn drives the rim 7 to rotate. The ropes arranged around the rim 7 act as guides under the rotation of the rim 7, changing the direction of the hoist rope movement to achieve the purpose of operation. Since both the hub 6 and the rim 7 are split structures, it is beneficial for the machining of larger guide wheel devices. The use of interference fit collars 11 and fastening plates 12 bolts for fixing forms a double connection protection for the two halves of the hub 6 of the fixed wheel 2, enhancing the overall connection strength of the split hub 6 of the fixed wheel 2. The compact bearing 5 mounting structure and bearing slope design improve the service life of the bearing 5, ensuring the stable operation of the guide wheel device and extending its service life.

[0033] The parts of this invention not described in detail are prior art. Besides the embodiments described above, this utility model may have other implementations, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A large sheave guide wheel arrangement for an elevator, characterized by: The system includes a movable wheel and a fixed wheel that run through the main shaft. Both ends of the main shaft are installed in bearing housings, and bearings are provided between the bearing housings and the main shaft. The main shaft has a keyway. The fixed wheel is fixedly connected to the main shaft by a flat key. The movable wheel has a bearing bush installed in its inner hole. Both the movable wheel and the fixed wheel have a split structure. Both the fixed wheel and the movable wheel include a hub, a rim, and spokes. The outer circumferential edge of the hub has a dovetail-shaped protrusion. The lower ends of the spokes are welded and fixed to the outer surfaces of the two ends of the dovetail-shaped protrusion of the hub and are evenly distributed along the outer circumference of the hub. The upper ends of the spokes are circumferentially distributed and fixed to the rim. The two sides of the protrusion of the fixed wheel hub have symmetrically opened annular grooves near the inner side of the hub. Interference rings are symmetrically arranged in the grooves.

2. A large sheave guide wheel assembly for an elevator as defined in claim 1, wherein: Fastening plates are fixed at the mating surfaces of the two semi-circular wheel hubs, and the fastening plates are used to connect the two semi-circular split-structure wheel hubs into a whole wheel hub by bolts.

3. A large guide wheel device for a hoist according to claim 1, characterized in that: The bearing housing has an end cap at the outer end and an upper cover at the top. The upper cover near the floating wheel or fixed wheel has an oil injection hole at the top. The spindle sleeve near the floating wheel or fixed wheel has a labyrinth seal ring on its outer circumference. The bearing has retaining rings on both the inner and outer sides to limit the bearing position.

4. A large guide wheel device for a hoist according to claim 1, characterized in that: A bushing is provided between the bearing and the spindle. The mating surfaces of the bearing inner ring and the bushing are both inclined and fit together. The inclination of the bushing decreases from both ends of the shaft towards the inward side.

5. A large guide wheel device for a hoist according to claim 1, characterized in that: The groove is matched with the structural dimensions of the interference fit ring.

6. A large guide wheel device for a hoist according to claim 1, characterized in that: The spokes are made of channel steel, and the sides of the two halves of the spokes are connected and fixed by steel plates. The sides of the spokes are A-shaped.

7. A large sheave guide wheel assembly for an elevator as defined in claim 1, wherein: The rim consists of two semi-circular structures joined together. A connecting plate is fixed at the joint of the two halves of the rim, and the connecting plate is used to connect and fix the two halves of the rim together by multiple sets of fastening bolts.

8. A large sheave guide wheel assembly for an elevator as defined in claim 7, wherein: The connecting plate is a U-shaped structure with the openings on both sides flaring outwards. The structure, shape, and size of the connecting plate are matched with the wheel rim.

9. A large guide wheel device for a hoist according to claim 1, characterized in that: The cross-section of the rim is a dovetail-shaped integral structure. A trapezoidal groove is opened at the bottom of the rim, and a wear-resistant liner is installed in the trapezoidal groove. An arc groove is opened in the middle of the top surface of the wear-resistant liner as a rope groove to place the rope. Bolts are provided along the rim axis and through the side of the rim to fix the wear-resistant liner.

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