Rope falling prevention device

Abstract

The utility model relates to the technical field of winch equipment, in particular to a rope falling prevention device. The device comprises an installation frame, a carrier roller assembly and a plurality of leaf spring sets, the carrier roller assembly and the leaf spring sets are installed on the installation frame, the carrier roller assembly comprises a roller shaft and a roller wheel, the roller shaft is sleeved with the roller wheel, the peripheral face of the roller wheel is in an arc shape, and the outer diameter of the roller wheel tends to be increased from the middle to the two ends; each leaf spring set comprises two oppositely-arranged leaf springs, and a rope on the carrier roller assembly can penetrate through the space between the two oppositely-arranged leaf springs. In the using process, the rope can slide down to the middle position of the roller under the action of gravity; the leaf spring can enable the rope to have a certain range of motion on the premise that the rope does not fall off, and normal use of equipment is guaranteed; meanwhile, after deformation, the leaf spring has elastic force for pushing the rope to move towards the middle position of the roller, so that the rope slides down to the middle position of the roller again. Through the arrangement, the rope is effectively prevented from falling off from the carrier roller assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of winch equipment, in particular to an anti - rope - shedding device. Background Art

[0002] The idler is a component used to support the steel wire rope in the shunting winch equipment, usually installed every few meters to prevent the steel wire rope from dragging on the ground and being worn. In order to prevent the steel wire rope from falling off the idler, the existing idlers are designed with bosses at both ends. However, when the force on the equipment changes greatly, the steel wire rope still cannot be prevented from falling off the idler, affecting the normal use of the equipment. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an anti - rope - shedding device to solve the technical problem that the steel wire rope in the prior art is easy to fall off the idler, affecting the normal use of the equipment.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An anti - rope - shedding device includes a mounting frame, an idler assembly and several groups of leaf spring groups mounted on the mounting frame, wherein:

[0006] The idler assembly includes a roller shaft and a roller wheel sleeved on the roller shaft. The outer peripheral surface of the roller wheel is arc - shaped, so that the outer diameter of the roller wheel increases from the middle to both ends.

[0007] Each group of leaf spring groups includes two relatively arranged leaf springs, and the rope on the idler assembly can pass through between the two relatively arranged leaf springs.

[0008] Further, the idler assembly further includes a bushing, and the roller shaft, the bushing and the roller wheel are sleeved in sequence.

[0009] Further, the idler assembly is processed by an integral casting process. And annular baffles are respectively arranged at both ends of the roller wheel along the axial direction.

[0010] Further, the number of the leaf spring groups is two, and they are respectively arranged on both sides of the roller wheel in the radial direction.

[0011] Further, it further includes a bottom plate, and the bottom plate is connected between the two relatively arranged leaf springs and fixed on the mounting frame.

[0012] Further, each leaf spring includes a straight - bar part and an arc - shaped part. Among them, the straight - bar part has a fixed end and a free end. The fixed end of the straight - bar part is connected to the bottom plate, and the free end of the straight - bar part is connected to the arc - shaped part.

[0013] Further, the distance between two oppositely arranged arc portions in the normal state is smaller than the diameter of the rope.

[0014] Further, the leaf spring and the bottom plate are integrally formed by a bending process.

[0015] Further, the mounting bracket includes a base plate and two roller fixing seats oppositely mounted on the base plate, and two ends of the roller shaft in the axial direction are respectively connected to the two roller fixing seats.

[0016] Further, each roller fixing seat is provided with a mounting hole for inserting the roller shaft;

[0017] A first anti-rotation surface is provided in the mounting hole, and a second anti-rotation surface abutting against the first anti-rotation surface is provided on the roller shaft.

[0018] Advantages of the present utility model:

[0019] The anti-rope-dropping device provided by the present utility model includes a mounting bracket, a roller assembly and several groups of leaf spring groups mounted on the mounting bracket, wherein: the roller assembly includes a roller shaft and a roller wheel sleeved on the roller shaft, and the outer peripheral surface of the roller wheel is arc-shaped, so that the outer diameter of the roller wheel increases from the middle to both ends; each group of leaf spring groups includes two oppositely arranged leaf springs, and the rope on the roller assembly can pass through between the two oppositely arranged leaf springs.

[0020] In the above structure, the outer diameter of the roller wheel increases from the middle to both ends, so that the rope slides down to the middle position of the roller wheel under the action of gravity, thereby effectively preventing the rope from falling off from both ends of the roller wheel. The two oppositely arranged leaf springs respectively block on both sides of the rope, further avoiding the problem of rope dropping. The leaf spring can undergo elastic deformation during the swinging process of the rope, enabling the rope to have a certain degree of mobility without falling off the rope, ensuring the normal use of the equipment; at the same time, the leaf spring has an elastic force that pushes the rope to move towards the middle position of the roller wheel after deformation, causing the rope to slide back to the middle position of the roller wheel. Description of the drawings

[0021] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the anti-rope-dropping device provided by the embodiment of the present utility model;

[0023] Figure 2Schematic front view structure diagram of the anti - rope - detachment device provided by the embodiment of the present utility model when the leaf spring is in a normal state;

[0024] Figure 3 Schematic front view structure diagram of the anti - rope - detachment device provided by the embodiment of the present utility model when one side of the leaf spring is in a deformed state;

[0025] Figure 4 Schematic top view structure diagram of the anti - rope - detachment device provided by the embodiment of the present utility model when one of the leaf springs is in a deformed state;

[0026] Figure 5 Schematic semi - sectional structure diagram of the idler assembly provided by the embodiment of the present utility model.

[0027] Icon:

[0028] 1 - mounting bracket; 11 - base plate; 12 - idler fixing seat;

[0029] 2 - idler assembly; 21 - roller shaft; 22 - bushing; 23 - roller; 231 - annular baffle;

[0030] 3 - leaf spring; 31 - straight part; 32 - arc part;

[0031] 4 - bottom plate;

[0032] 5 - notch. Detailed implementation manners

[0033] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that in the description of the present utility model, the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] It should be noted that in the description of the present utility model, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The present utility model provides an anti - rope - detachment device. Referring to Figure 1 and Figure 2 , in the figure, the dotted line represents a rope (such as a steel wire rope). The anti - rope - detachment device includes a mounting frame 1, a roller assembly 2 mounted on the mounting frame 1, and several groups of leaf spring groups, where:

[0037] The roller assembly 2 includes a roller shaft 21 and a roller 23 sleeved on the roller shaft 21. The outer peripheral surface of the roller 23 is arc - shaped, so that the outer diameter of the roller 23 increases from the middle to both ends.

[0038] Each group of leaf spring groups includes two relatively arranged leaf springs 3, and the rope on the roller assembly 2 can pass through between the two relatively arranged leaf springs 3.

[0039] In the above structure, the outer diameter of the roller 23 increases from the middle to both ends, so that the rope slides down to the middle position of the roller 23 under the action of gravity, thereby effectively preventing the rope from falling off from both ends of the roller 23. The two relatively arranged leaf springs 3 respectively block on both sides of the rope, further avoiding the problem of rope detachment. The leaf spring 3 can undergo elastic deformation during the swinging process of the rope, enabling the rope to have a certain degree of mobility on the premise of not detaching from the rope, ensuring the normal use of the equipment; at the same time, after the leaf spring 3 deforms, it has an elastic force that pushes the rope towards the middle position of the roller 23, causing the rope to slide back to the middle position of the roller 23.

[0040] Continuing to refer to Figure 1 , the mounting frame 1 includes a base plate 11 and two relatively mounted roller fixing seats 12 on the base plate 11. The two ends of the roller shaft 21 along the axial direction are respectively connected to the two roller fixing seats 12.

[0041] In this embodiment, the roller fixing seat 12 is fixed on the base plate 11 by bolts. Bolt through - holes for installing the entire device are provided on the base plate 11. When installing the above - mentioned device, only need to fix the base plate 11 at the set position by bolts, with a simple structure and convenient installation.

[0042] On the basis of the above - mentioned structure, each roller fixing seat 12 is provided with a mounting hole for the roller shaft 21 to insert;

[0043] A first anti - rotation surface is provided in the mounting hole, and a second anti - rotation surface that abuts against the first anti - rotation surface is provided on the roller shaft 21.

[0044] Specifically, two opposite first anti-rotation surfaces are provided in each mounting hole; two second anti-rotation surfaces are respectively provided on the two shaft heads of the roller shaft 21, and the second anti-rotation surfaces are in one-to-one correspondence and abut against the first anti-rotation surfaces, so as to fixedly mount the two shaft heads of the roller shaft 21 on the two roller fixing seats 12 respectively. The roller 23 is sleeved on the roller shaft 21 and is located between the two roller fixing seats 12.

[0045] Continue to refer to Figure 1 , the number of the leaf spring groups is two, and they are respectively arranged on both sides in the radial direction of the roller 23. Each leaf spring 3 can deform independently, that is, the four leaf springs 3 can deform in different ways according to different swinging conditions of the rope.

[0046] As a deformation mode of the leaf spring 3, refer to Figure 2 and Figure 3 , under the action of an external force, the rope as a whole moves from the middle position of the roller 23 to one end of the roller 23. At this time, the two leaf springs 3 arranged on the same side deform under the push of the rope; when the external force on the rope is reduced or disappears, the two leaf springs 3 arranged on the same side return to the normal state and at the same time push the rope to slide to the middle position of the roller 23.

[0047] As another deformation mode of the leaf spring 3, refer to Figure 4 , the rope deflects under the action of an external force. At this time, the leaf spring 3 corresponding to the deflected section of the rope deforms under the push of the rope; when the external force on the rope is reduced or disappears, this leaf spring 3 returns to the normal state and at the same time pushes the deflected section of the rope to slide to the middle position of the roller 23.

[0048] Continue to refer to Figure 1 , the anti-rope-off device further includes a bottom plate 4, and the bottom plate 4 is connected between two relatively arranged leaf springs 3 and is fixed on the mounting frame 1.

[0049] In this embodiment, the leaf spring 3 and the bottom plate 4 are integrally formed by a bending process. Specifically, the leaf spring 3 and the bottom plate 4 form a complete spring plate, and the spring plate includes the bottom plate 4 and two side plates respectively arranged on both sides of the bottom plate 4. Each side plate is provided with a notch 5, and the roller assembly 2 passes through the two notches 5. The notch 5 makes each side plate form two leaf springs 3 respectively arranged on both sides in the radial direction of the roller 23.

[0050] On the basis of the above structure, the spring plate is located between the two roller fixing seats 12, and the bottom plate 4 is fixed on the substrate 11 by screws.

[0051] Continue to refer to Figure 2, each leaf spring 3 includes a straight portion 31 and an arc portion 32. Among them, the straight portion 31 has a fixed end and a free end. The fixed end of the straight portion 31 is connected to the bottom plate 4, and the free end of the straight portion 31 is connected to the arc portion 32.

[0052] In this embodiment, the lower end of the straight portion 31 is the fixed end, the upper end of the straight portion 31 is the free end, and the straight portion 31 is inclined upward toward the middle position of the roller 23. The arc portion 32 is located at the upper end of the straight portion 31, and at least part of the arc portion 32 is located above the roller 23.

[0053] In the above structure, the arc portion 32 is semi-surroundingly disposed around the circumference of the rope, thereby further preventing the rope from falling off. When the rope swings under the action of an external force, the rope abuts against the concave surface of the arc portion 32 and pushes the straight portion 31 to swing; when the external force weakens or disappears, the rope falls to the middle position of the roller 23 under the dual action of the elastic force of the straight portion 31 and its own gravity.

[0054] On the basis of the above structure, the distance A between the two oppositely arranged arc portions 32 in the normal state is smaller than the diameter of the rope.

[0055] Refer to Figure 5 , the idler assembly 2 further includes a bushing 22. The roller shaft 21, the bushing 22, and the roller 23 are sleeved in sequence. Among them, the bushing 22 is made of non-nylon material, and the roller 23 is made of nylon material. The above setting can save the amount of nylon used and reduce the production cost. Optionally, the bushing 22 is made of metal material to effectively support the roller 23 and improve the structural strength and service life of the idler assembly 2.

[0056] Furthermore, the idler assembly 2 is processed by an integral casting process. The cost of the idler assembly 2 is low, which further reduces the production cost.

[0057] Furthermore, annular baffles 231 are respectively arranged at both axial ends of the roller 23. The annular baffles 231 can limit the maximum deformation of the leaf spring 3 and prevent the leaf spring 3 from failing.

[0058] In summary, the anti-rope-dropping device provided by this application sets the outer peripheral surface of the roller 23 as an arc, so that the rope can naturally fall to the middle position of the roller 23 under the action of gravity. The leaf spring 3 can enable the rope to have a certain degree of mobility without dropping the rope, ensuring the normal use of the equipment. Through the self-weight of the rope and the elastic force of the leaf spring 3, the problem of rope dropping is avoided. In addition, the device also has advantages such as simple structure, low cost, and convenient installation, and has high practicability.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rope-stripping prevention device, characterized in that: It comprises a mounting frame (1), a roller assembly (2) and a plurality of leaf spring groups mounted on the mounting frame (1), wherein: The roller assembly (2) comprises a roller shaft (21) and a roller wheel (23) sleeved on the roller shaft (21); the outer peripheral surface of the roller wheel (23) is arc-shaped, so that the outer diameter of the roller wheel (23) increases from the middle to both ends; Each group of leaf springs comprises two leaf springs (3) arranged opposite to each other, and the rope on the roller assembly (2) can pass between the two leaf springs (3) arranged opposite to each other.

2. The anti-rope-off device according to claim 1, characterized in that: The roller assembly (2) further comprises a bushing (22), the roller shaft (21), the bushing (22) and the roller (23) are sequentially mounted, and the roller (23) is made of nylon.

3. The anti-rope-off device according to claim 2, characterized in that: The roller assembly (2) is manufactured by an integral casting process.

4. The anti-rope-off device according to claim 2, characterized in that: The leaf spring groups are two in number and are respectively arranged on two sides of the roller (23) in the radial direction.

5. The anti-rope-off device according to claim 4, characterized in that: It also comprises a bottom plate (4), wherein the bottom plate (4) is connected between the two oppositely arranged leaf springs (3) and is fixed on the mounting frame (1).

6. The anti-rope-off device according to claim 5, characterized in that: Each of the leaf springs (3) comprises a straight portion (31) and an arc-shaped portion (32), wherein the straight portion (31) has a fixed end and a free end, the fixed end of the straight portion (31) is connected to the bottom plate (4), and the free end of the straight portion (31) is connected to the arc-shaped portion (32).

7. The anti-rope-off device according to claim 6, characterized in that: The distance between the two oppositely arranged arc-shaped portions (32) is smaller than the diameter of the rope in a normal state.

8. The anti-rope-off device according to claim 5, characterized in that: The leaf spring (3) and the bottom sheet (4) are integrally formed by a bending process.

9. The anti-rope-off device according to any one of claims 1 to 8, characterized in that: The mounting frame (1) comprises a base plate (11) and two roller fixing seats (12) relatively mounted on the base plate (11), and two ends of the roller shaft (21) along the axial direction are respectively connected to the two roller fixing seats (12).

10. The anti-rope-off device according to claim 9, characterized in that: Each of the roller fixing seats (12) is provided with a mounting hole for inserting the roller shaft (21); A first anti-rotation surface is arranged in the mounting hole, and a second anti-rotation surface abutting against the first anti-rotation surface is arranged on the roller shaft (21).

Images