Rope sheave limiting device of large-tonnage goods elevator

Abstract

The rope wheel limiting device of the large-tonnage goods elevator comprises a bearing beam, a rope wheel, a U-shaped bolt and a limiting device body, the axis of the rope wheel is rotationally supported through a supporting shaft, and the end of the supporting shaft is installed on the upper portion of the bearing beam and is pressed and fixed through the U-shaped bolt; the limiting device is fixedly installed on the bearing beam and located on the outer side of the end of the supporting shaft. The limiting device is in threaded connection with an ejector rod, and one end of the ejector rod faces the supporting shaft and is provided with a shaft clamping piece. The side, facing the supporting shaft, of the shaft clamping piece abuts against the periphery of the supporting shaft, and axial limiting is achieved through friction between the shaft clamping piece and the supporting shaft. By rotating the ejector rod bolt, the shaft clamping plate is driven to abut against a shaft of the rope wheel, axial deviation generated after a large-tonnage goods elevator operates for a long time and damage to the rope wheel caused by long-time operation are prevented, and the device is assembled in a complete set, does not need to be welded and is convenient and fast to install.

Description

Technical Field

[0001] This utility model relates to elevator equipment, and more specifically, to a rope pulley limiting device for a large-tonnage freight elevator. Background Technology

[0002] Currently, there are more and more industrial park projects in the elevator industry, especially those requiring heavy loads for transporting large equipment. Large-tonnage freight elevators often use non-standard sheaves, sometimes with more than a dozen sheaves, requiring relatively high installation precision. Currently, the end of the sheave support shaft is usually installed using U-bolts, which can press and fix the support shaft to the load-bearing beam. However, the installation stability of the support shaft end is poor. If the sheave is slightly misaligned by a few millimeters, the wire rope will develop grooves, leading to sheave damage over time. In more serious cases, it can cause the wire rope to derail, resulting in a safety accident.

[0003] Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a rope wheel limiting device for a large-tonnage freight elevator. By adding a limiting device, the shaft of the rope wheel is limited to prevent the rope wheel from deviating.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sheave limiting device for a large-tonnage freight elevator includes a load-bearing beam, a sheave, a U-bolt, and a limiting device. The sheave's axis is rotatably supported by a support shaft, the end of which is mounted on the upper part of the load-bearing beam and secured by the U-bolt. The limiting device is fixedly mounted on the load-bearing beam and located outside the end of the support shaft. The limiting device is threadedly connected to a push rod, one end of which faces the support shaft and is fitted with a shaft clamping component. The side of the shaft clamping component facing the support shaft presses against the outer circumference of the support shaft, achieving axial limiting through friction between the shaft clamping component and the support shaft.

[0007] The present invention is further configured such that the U-bolt includes an arc-shaped portion and two ends, the two ends of the U-bolt pass through the load-bearing beam and are threadedly connected to a nut; the arc-shaped portion and the load-bearing beam enclose an installation space, and the support shaft is fixedly installed in the installation space.

[0008] The present invention is further configured such that the retaining member has an arc-shaped surface on the side facing the support shaft, and the arc-shaped surface abuts against the outer periphery of the support shaft.

[0009] The present invention is further configured such that the arcuate surface of the retaining pin is adapted to the outer periphery of the support shaft.

[0010] The present invention is further configured such that the retaining pin is detachably mounted on the top rod.

[0011] The present invention is further configured such that the retaining shaft has a threaded hole, and the end of the push rod is threaded into the threaded hole.

[0012] The present invention is further configured such that the limiting device includes a limiting block, the limiting block includes a connecting part one and a connecting part two fixedly connected to each other, the connecting part one is fixedly connected to the load-bearing beam, the connecting part two has a threaded hole two, and the push rod is threadedly connected to the threaded hole two.

[0013] The present invention is further configured such that the top rod is externally threaded with a second nut, and the second nut is located on the side of the connecting part two facing the retaining member.

[0014] The present invention is further configured such that a washer is installed between the second nut and the second connecting part, and the second nut can abut against the second connecting part through the washer.

[0015] The present invention is further configured such that both ends of the support shaft are installed on the load-bearing beam by U-bolts, and limit devices are provided on the outer sides of both ends of the support shaft for limiting.

[0016] In summary, this utility model has the following beneficial effects:

[0017] The support shaft of the rope pulley is fixedly installed on the load-bearing beam by U-bolts, and is attached and fixed by a limiting device and a top rod. The top rod can maintain a stable pressing effect on the outer periphery of the support shaft with the help of the shaft clamping component, thereby increasing the limiting of the support shaft and improving the axial stability of the support shaft.

[0018] The clamping component forms an arc-shaped surface on the side facing the support shaft. When the arc-shaped surface abuts against the support shaft, it can maintain a stable pressure contact between the two, thus having a larger arc-shaped pressure contact surface, increasing the pressure contact area, forming a stable pressure effect, maintaining the axial stability of the support shaft, and avoiding axial movement that would affect the normal operation of the elevator equipment. Attached Figure Description

[0019] Figure 1 This is a front view of a rope pulley limiting device for a large-tonnage freight elevator in this embodiment;

[0020] Figure 2 This is a top view of a rope pulley limiting device for a large-tonnage freight elevator in this embodiment;

[0021] Figure 3 This is a schematic diagram of the limiting device, top rod, and locking shaft in this embodiment.

[0022] Reference numerals: 1. Load-bearing beam; 2. Rope pulley; 21. Support shaft; 3. U-bolt; 31. Arc-shaped part; 32. End; 33. Nut 1; 34. Installation space; 4. Shaft clamp; 41. Arc-shaped surface; 42. Threaded hole 1; 5. Limiting device; 50. Limiting block; 51. Connecting part 1; 511. Connecting hole 2; 521. Threaded hole 2; 6. Top rod; 60. External thread; 61. Thread head; 62. Nut 2; 63. Washer; 7. Fastening bolt. Detailed Implementation

[0023] 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.

[0024] This embodiment discloses a rope pulley limiting device for a large-tonnage freight elevator, referring to... Figures 1-3 As shown, the assembly includes a load-bearing beam 1, a rope pulley 2, U-bolts 3, and a limiting device 5. The axis of the rope pulley 2 is rotatably supported by a support shaft 21. Both ends of the support shaft 21 are mounted on the upper part of the load-bearing beam 1 and are tightened and fixed by the U-bolts 3. After the two ends of the support shaft 21 are fixed, the rope pulley 2 is rotatably connected by bearings, which can keep the rope pulley 2 rotating smoothly.

[0025] The U-bolt 3 is roughly U-shaped, including an arc-shaped portion 31 and two ends 32. The two ends 32 of the U-bolt 3 pass through the load-bearing beam 1 and are threaded with nuts 33. The arc-shaped portion 31 and the load-bearing beam 1 enclose an installation space 34. The support shaft 21 extends into the installation space 34. By tightening the nuts 33, the U-bolt 3 is pushed downwards, thereby pressing the support shaft 21 into place within the installation space 34, thus fixing the support shaft 21.

[0026] After being tightened and fixed by the U-bolts 3, the support shaft 21 can maintain its radial stability. However, the axial limitation of the support shaft 21 is mainly achieved through the friction between the U-bolts 3, the load-bearing beam 1, and the outer circumference of the support shaft 21. Moreover, because the outer circumference of the support shaft 21 is arc-shaped, the area of ​​pressure on the outer circumference of the support shaft 21 is relatively small, resulting in poor frictional stability and easy axial movement. After the support shaft 21 undergoes axial movement, it is easy for misalignment and grooves to form between the rope pulley 2 and the wire rope, or even for it to fall off.

[0027] The limiting device 5 is fixedly installed on the load-bearing beam 1 and located on the outer side of the end of the support shaft 21. A locking component installed on the limiting device 5 applies pressure to the support shaft 21. The limiting device 5 is threadedly connected to a push rod 6, one end of which faces the support shaft 21 and is fitted with a retaining member 4. The retaining member 4, facing the support shaft 21, presses against the outer circumference of the support shaft 21. Axial limiting is achieved through friction between the retaining member 4 and the support shaft 21, increasing the frictional contact surface and frictional action outside the support shaft 21, thereby maintaining the axial stability of the support shaft 21.

[0028] Reference Figure 3 As shown, the retaining shaft 4 has an arc-shaped surface 41 on the side facing the support shaft 21, and the arc-shaped surface 41 abuts against the outer periphery of the support shaft 21. The arc-shaped surface 41 has an overall arc-shaped tile-like structure.

[0029] To maintain the pressing and fitting effect between the retaining shaft 4 and the support shaft 21, the curvature of the arc-shaped surface 41 of the retaining shaft 4 is adapted to the outer periphery of the support shaft 21. When the arc-shaped surface 41 of the retaining shaft 4 abuts against the support shaft 21, it can maintain a stable pressing contact between the two, thus providing a larger arc-shaped pressing contact surface and increasing the pressing contact area. Moreover, the arc-shaped surface 41 of the retaining shaft 4 is located on the side of the support shaft 21, and the arc-shaped surface 41 extends to the upper and lower sides, which can form a certain positioning effect. Combined with the locking of the U-bolt 3 and the pressing of the retaining shaft 4, it can form a more stable pressing point.

[0030] Furthermore, the retaining shaft 4 is detachably installed on the push rod 6, allowing the retaining shaft 4 to be removed and replaced from the end of the push rod 6, thus enabling it to adapt to different support shafts 21. Specifically, the retaining shaft 4 has a threaded hole 42, and the outer periphery of the push rod 6 is provided with an external thread 60, which is threadedly matched with the threaded hole 42. The end of the push rod 6 is threadedly connected to the threaded hole 42, thereby enabling the retaining shaft 4 to be connected and fixed to the push rod 6; and, disassembly and assembly can be achieved by rotating the thread.

[0031] Reference Figure 3 As shown, the limiting device 5 includes a limiting block 50, which includes a connecting part 1 51 and a connecting part 2 52 that are fixedly connected to each other. The connecting part 1 51 and the connecting part 2 52 are integrally fixedly connected to form an L-shaped structure, and reinforcing ribs are fixedly installed between the two sides to improve the connection strength and stability of the connecting part 1 51 and the connecting part 2 52.

[0032] The first connecting part 51 is fixedly connected to the load-bearing beam 1. The first connecting part 51 has at least two through holes, through which the fastening bolts 7 pass to connect and fix the first connecting part 51 to the load-bearing beam 1. The second connecting part 52 has a vertical structure and has a threaded hole 521. The push rod 6 is threaded into the threaded hole 521. The push rod 6 has a roughly horizontal structure and is basically perpendicular to the support shaft 21.

[0033] A screw head 61 is fixedly connected to one end of the push rod 6 facing away from the retaining shaft 4, and the screw head 61 can be used to easily adjust the thread of the push rod 6.

[0034] Furthermore, a second nut 62 is threaded onto the top rod 6, and the second nut 62 is located on the side of the connecting part 52 facing the retaining member 4. A washer 63 is installed between the second nut 62 and the connecting part 52, and the second nut 62 can abut against the connecting part 52 through the washer 63.

[0035] Nut 62 can achieve pressure limiting. Nut 62 is threaded and tightened towards connecting part 52. Nut 62 can abut against connecting part 52 to generate pressure positioning. It can form a double nut self-locking between connecting part 52, nut 62 and push rod 6, which can lock and fix push rod 6, and facilitate adjustment and fastening of push rod 6.

[0036] The retaining shaft 4 is threadedly connected to the end of the push rod 6, allowing for adjustment of the retaining shaft 4 to maintain a stable pressure against the support shaft 21. Furthermore, to improve the connection stability between the retaining shaft 4 and the push rod 6, an annular boss can be formed on the side of the retaining shaft 4 facing away from the support shaft 21, thereby extending the threaded hole 42 and increasing its depth, thus enhancing the connection strength between the retaining shaft 4 and the push rod 6.

[0037] In practical use, by tightening the nut 33 by thread, the support shaft 21 is first stably pressed and fixed onto the load-bearing beam 1 by the U-bolt 3; then, by adjusting the top rod 6 by thread, the top rod 6 can drive the shaft retainer 4 to abut against the outer circumference of the support shaft 21, so that the arc-shaped surface 41 of the shaft retainer 4 can press and fix with the support shaft 21. Through the pressing action of the shaft retainer 4, a stable friction limit effect can be formed between it and the support shaft 21, preventing axial displacement caused by long-term operation of the large-tonnage freight elevator, and preventing damage to the rope wheel caused by long-term operation.

[0038] Then, by tightening nut 62, nut 62, washer 63, and connecting part 52 can press against each other to form a double-nut pressing and locking fixation, which can fix the position of the top rod 6. By assembling multiple threaded parts, the rope pulley limiting device of the entire large-tonnage freight elevator can be easily assembled without welding, making operation more convenient.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A rope wheel limiting device for a large-tonnage freight elevator, characterized by, The utility model provides a kind of supporting beam (1), rope wheel (2), U-shaped bolt (3) and limiting device (5), the axis of rope wheel (2) is rotatably supported by support shaft (21), the end of support shaft (21) is installed on the upper portion of supporting beam (1), and is fixed by U-shaped bolt (3) and is pressed;Limiting device (5) is fixedly installed on supporting beam (1), and is located at the outside of the end of support shaft (21);Limiting device (5) is threadedly connected with top rod (6), one end of top rod (6) is towards support shaft (21), and is installed with axle clamp piece (4);The side of axle clamp piece (4) towards support shaft (21) is pressed against the outer periphery of support shaft (21), and axial limiting is realized by the friction of axle clamp piece (4) and support shaft (21).

2. A rope pulley limiter device for a large tonnage goods elevator according to claim 1, characterized in that, The U-shaped bolt (3) includes an arc portion (31) and two end portions (32), the two end portions (32) of the U-shaped bolt (3) pass through the supporting beam (1), and are threadedly connected with a nut (33); the arc portion (31) and the supporting beam (1) form an installation space (34) therebetween, and the support shaft (21) is fixedly installed in the installation space (34).

3. A rope pulley limiter for a large tonnage passenger lift as claimed in claim 1, wherein, The side of the axle clamp piece (4) towards the support shaft (21) is formed with an arc surface (41), and the arc surface (41) is pressed against the outer periphery of the support shaft (21).

4. A rope pulley limiter device for a large tonnage goods elevator according to claim 3, characterized in that, The curvature of the arc surface (41) of the axle clamp piece (4) is adapted to the outer periphery contour of the support shaft (21).

5. A rope pulley limiter for large tonnage passenger elevators as defined in claim 1, wherein, The axle clamp piece (4) is detachably installed on the top rod (6).

6. A rope pulley limiter device for a large tonnage goods elevator according to claim 5, characterized in that, The axle clamp piece (4) is provided with a threaded hole (42), and the end of the top rod (6) is threadedly connected in the threaded hole (42).

7. A rope pulley limiter for large tonnage passenger elevators as defined in claim 1, wherein, The limiting device (5) includes a limiting block (50), the limiting block (50) includes a first connecting portion (51) and a second connecting portion (52) fixedly connected with each other, the first connecting portion (51) is fixedly connected to the supporting beam (1), the second connecting portion (52) is provided with a threaded hole (521), and the top rod (6) is threadedly connected to the threaded hole (521).

8. A rope pulley limiter device for a large tonnage goods elevator according to claim 7, characterized in that, The top rod (6) is externally threadedly connected with a nut (62), and the nut (62) is located on the side of the second connecting portion (52) towards the axle clamp piece (4).

9. A rope pulley limiter device for a large tonnage passenger lift according to claim 8, characterized in that, A gasket (63) is installed between the nut (62) and the second connecting portion (52), and the nut (62) can abut against the second connecting portion (52) through the gasket (63).

10. A rope pulley limiter for a large tonnage passenger lift as claimed in claim 1, wherein, The two ends of the support shaft (21) are both installed on the supporting beam (1) by the U-shaped bolt (3), and the limiting device (5) is arranged on the outside of the two ends of the support shaft (21) for limiting.

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