CN111675105A - Rope skipping prevention structure and engineering machinery - Google Patents

Abstract

The embodiment of the invention provides an anti-rope-skipping structure and engineering machinery, and relates to the technical field of engineering machinery. The rope skipping prevention structure comprises a support, a check ring and a damping assembly, wherein the check ring is movably connected to the support, the support and the check ring jointly form an accommodating frame, the accommodating frame is used for a steel wire rope to pass through, and the damping assembly is respectively connected with the check ring and the support; the shock absorption assembly is used for reducing the motion amplitude of the steel wire rope in the accommodating frame. The holding frame that this prevent rope skipping structure formed can inject wire rope's home range to shock-absorbing component's setting can slowly reduce wire rope and to the impact of retaining ring and support, and the structure is reliable, and buffering effect is good, can effectively avoid the too big and problem of "rope skipping" of wire rope amplitude.

Description

Rope skipping prevention structure and engineering machinery

Technical Field

The invention relates to the technical field of engineering machinery, in particular to an anti-rope-skipping structure and engineering machinery.

Background

Along with the increasingly explosive fire in the foundation construction market, the effect of crawler crane not only satisfies the hoist and mount, still is applicable to operation operating modes such as dynamic compaction, towards grab bucket, vibratory hammer. To installing the crawler crane of free lifting hook function, there is or not the operation in-process suddenly at pulling force, wire rope produces and seriously rocks, for example: the steel wire rope can seriously shake after the heavy object falls to the ground. When the shaking amount exceeds the range of the arm support, the wire rope skipping can be caused to be hung on other parts on the arm support, the wire rope can be further caused to abrade the arm support and the like, and various faults can be generated, so that the application of the anti-skipping structure is imperative.

Disclosure of Invention

The invention aims to provide a rope skipping prevention structure and engineering machinery, which can relieve the shaking of a steel wire rope and effectively avoid the problem of rope skipping caused by overlarge amplitude of the steel wire rope.

Embodiments of the invention may be implemented as follows:

in a first aspect, an embodiment of the present invention provides an anti-rope-skipping structure, which includes a support, a retainer ring, and a shock-absorbing assembly, wherein the retainer ring is movably connected to the support, the support and the retainer ring together form an accommodating frame, the accommodating frame is used for a steel wire rope to pass through, and the shock-absorbing assembly is respectively connected to the retainer ring and the support; the shock absorption assembly is used for reducing the motion amplitude of the steel wire rope in the accommodating frame.

In an optional embodiment, a limiting member is disposed on the retainer ring, and the damping assembly is disposed between the bracket and the limiting member.

In an optional embodiment, the shock absorbing assembly includes a first elastic member and a second elastic member, the retainer includes a first supporting member and a second supporting member connected to each other, the first supporting member and the second supporting member are respectively movably connected to the bracket, the first elastic member is respectively connected to the first supporting member and the bracket, and the second elastic member is respectively connected to the second supporting member and the bracket.

In an optional embodiment, the limiting member includes a first limiting block and a second limiting block, the first limiting block is disposed on the first supporting member, and the second limiting block is disposed on the second supporting member;

the first elastic piece is arranged between the support and the first limiting block, and the second elastic piece is arranged between the support and the second limiting block.

In an optional embodiment, the first elastic member and the second elastic member are respectively provided with a spring, the first elastic member is sleeved on the first support member, one end of the first elastic member is connected with the bracket, and the other end of the first elastic member abuts against the first limit block;

the second elastic piece is sleeved on the second supporting piece, one end of the second elastic piece is connected with the support, and the other end of the second elastic piece is abutted to the second limiting block.

In an alternative embodiment, the bracket is provided with a first guide hole and a second guide hole, the first support member is inserted into the first guide hole and can move along the first guide hole, and the second support member is inserted into the second guide hole and can move along the second guide hole.

In an optional embodiment, the shock absorbing assembly further includes a third elastic member and a fourth elastic member, the first elastic member and the third elastic member are respectively sleeved on the first supporting member, the first elastic member is located on one side of the bracket, and the third elastic member is located on the other side of the bracket;

the second elastic piece and the fourth elastic piece are respectively sleeved on the second support piece, the second elastic piece is located on one side of the support, and the fourth elastic piece is located on the other side of the support.

In an optional embodiment, a first adjusting part is arranged on the first supporting part, and the third elastic part is connected with the first adjusting part; and a second adjusting piece is arranged on the second supporting piece, and the fourth elastic piece is connected with the second adjusting piece.

In an optional embodiment, the receiving frame further comprises a stopper, the stopper is fixedly connected with the bracket, and the stopper and the retainer ring together form the receiving frame.

In a second aspect, an embodiment of the present invention provides an engineering machine, which includes an arm support and the rope skipping prevention structure according to any one of the foregoing embodiments, where the rope skipping prevention structure is installed on the arm support. The rope skipping prevention structure comprises a support, a retainer ring and a damping assembly, wherein the retainer ring is movably connected to the support, the support and the retainer ring jointly form an accommodating frame, the accommodating frame is used for a steel wire rope to pass through, and the damping assembly is respectively connected with the retainer ring and the support; the shock absorption assembly is used for reducing the motion amplitude of the steel wire rope in the accommodating frame.

The beneficial effects of the embodiment of the invention include, for example:

according to the rope skipping prevention structure provided by the embodiment of the invention, the support and the check ring are enclosed to form the containing frame, the formed containing frame can limit the moving range of the steel wire rope, the shaking of the steel wire rope is reduced, the shock of the steel wire rope to the check ring and the support can be relieved by the arrangement of the shock absorption assembly, the structure is reliable, the buffering effect is good, and the problem of rope skipping caused by overlarge amplitude of the steel wire rope can be effectively avoided.

The engineering machinery provided by the embodiment of the invention comprises the arm support and the rope skipping prevention structure, and the rope skipping prevention structure is arranged on the arm support, so that the shaking, namely the motion amplitude, of the steel wire rope can be effectively reduced, the impact and the abrasion of the steel wire rope, the arm support, the support and the check ring are reduced, the failure rate is reduced, and the service life of the engineering machinery is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an overall schematic view of an anti-skipping rope structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an implementation of an anti-skipping rope structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of an anti-skipping rope structure according to an embodiment of the present invention.

Icon: 100-rope skipping prevention structure; 110-a scaffold; 111-a first surface; 112-a second surface; 120-a retainer ring; 121-a first support; 122-a second support; 123-a first stopper; 124-a second stopper; 125-a first adjustment member; 126-a second adjustment member; 140-a shock absorbing assembly; 141-a first elastic member; 142-a second resilient member; 143-a third elastic member; 144-a fourth elastic member; 150-a stopper; 151-a mounting portion; 160-a mounting frame; 170-safety rope; 171-hanging ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1, the embodiment provides an anti-rope-skipping structure 100, which includes a bracket 110, a retainer ring 120 and a shock absorbing assembly 140, wherein the retainer ring 120 is movably connected to the bracket 110, the bracket 110 and the retainer ring 120 together form a receiving frame (not shown), the receiving frame is used for a steel wire rope (not shown) to pass through, and the steel wire rope can only move within a range limited by the receiving frame. The damping assembly 140 is respectively connected with the retainer ring 120 and the support 110, and the damping assembly 140 is used for reducing the motion amplitude of the steel wire rope in the accommodating frame so as to reduce the impact of the steel wire rope on the retainer ring 120 and the support 110 and prevent the steel wire rope from jumping. The rope skipping prevention structure 100 is simple and reliable, has a good buffering effect, and can effectively solve the rope skipping problem of the steel wire rope.

In this embodiment, the retainer ring 120 is provided with a limiting member, and the damping member 140 is disposed between the bracket 110 and the limiting member. When the steel wire rope rocks in the accommodating frame to drive the retainer ring 120 to move relative to the support 110, the damping assembly 140 can convert kinetic energy of the movement of the steel wire rope into elastic potential energy, so that a damping and buffering effect is achieved, the movement amplitude of the steel wire rope is reduced, and rope skipping of the steel wire rope is effectively avoided.

Optionally, the retainer ring 120 includes a first supporting member 121 and a second supporting member 122 connected to each other, and the first supporting member 121 and the second supporting member 122 are respectively movably connected to the bracket 110. The first supporting member 121 and the second supporting member 122 are connected to each other to form a U-shape, i.e., the retainer ring 120 is U-shaped. Of course, the retainer ring 120 may be formed in any shape such as a circular ring, an arch, an oval, a triangle, a rectangle, or a diamond. The first supporting member 121 and the second supporting member 122 may be integrally formed or may be fixedly connected in a separated manner, and is not particularly limited herein.

The bracket 110 includes a first surface 111 and a second surface 112 disposed opposite to each other, the bracket 110 has a first guide hole (not shown) and a second guide hole (not shown), the first support 121 is inserted into the first guide hole and can move along the first guide hole, and the second support 122 is inserted into the second guide hole and can move along the second guide hole. The first guide hole penetrates the first surface 111 and the second surface 112, and the second guide hole penetrates the first surface 111 and the second surface 112. In this embodiment, taking the U-shaped retainer ring 120 as an example, after the retainer ring 120 is mounted on the bracket 110, the U-shaped opening of the retainer ring 120 is located on the first surface 111 side of the bracket 110, and the U-shaped bottom of the retainer ring 120 is located on the second surface 112 side of the bracket 110.

Further, the shock absorbing assembly 140 includes a first elastic member 141, a second elastic member 142, a third elastic member 143, and a fourth elastic member 144, wherein the first elastic member 141 and the third elastic member 143 are respectively sleeved on the first supporting member 121, the first elastic member 141 is located on one side of the bracket 110, and the third elastic member 143 is located on the other side of the bracket 110. The second elastic element 142 and the fourth elastic element 144 are respectively sleeved on the second supporting element 122, the second elastic element 142 is located on one side of the bracket 110, and the fourth elastic element 144 is located on the other side of the bracket 110. Alternatively, the first elastic member 141, the second elastic member 142, the third elastic member 143 and the fourth elastic member 144 are all springs, and the inner diameter of the springs is adapted to the outer diameter of the first support 121 and the second support 122. The first elastic member 141 and the third elastic member 143 are positioned at one side of the first surface 111 of the bracket 110, and the second elastic member 142 and the fourth elastic member 144 are positioned at one side of the second surface 112 of the bracket 110.

The limiting member comprises a first limiting block 123 and a second limiting block 124, the first limiting block 123 is arranged on the first supporting member 121, and the second limiting block 124 is arranged on the second supporting member 122; the first stopper 123 and the second stopper 124 are both located on a side of the retainer ring 120 adjacent to the second surface 112 of the bracket 110. That is, the first elastic member 141 is disposed between the bracket 110 and the first stopper 123, and the second elastic member 142 is disposed between the bracket 110 and the second stopper 124. Alternatively, the first elastic member 141 is connected to the first support 121 and the bracket 110, respectively, and the second elastic member 142 is connected to the second support 122 and the bracket 110, respectively. For example, one end of the first elastic member 141 is connected to the bracket 110, and the other end abuts against the first stopper 123; one end of the second elastic member 142 is connected to the bracket 110, and the other end abuts against the second stopper 124. It should be noted that both ends of the first elastic element 141 may contact, connect or abut against the second surface 112 and the first stopper 123 of the bracket 110, respectively, or the first elastic element 141 may be placed between the second surface 112 and the first stopper 123, and has no connection relationship with the second surface 112 and the first stopper 123, as long as the damping effect can be achieved during the movement of the retainer ring 120 relative to the bracket 110, and this is not limited specifically here. Similarly, the second elastic member 142 is disposed on the same principle as the first elastic member 141, and is not particularly limited herein.

Further, the first supporting member 121 is provided with a first adjusting member 125, and the third elastic member 143 is connected with the first adjusting member 125; the second supporting member 122 is provided with a second adjusting member 126, and the fourth elastic member 144 is connected with the second adjusting member 126. The first adjusting element 125 and the second adjusting element 126 are disposed on a side of the retainer ring 120 close to the first surface 111 of the bracket 110, and the first adjusting element 125 and the second adjusting element 126 can axially limit the second elastic element 142 and the fourth elastic element 144 and can also adjust the moving stroke of the second elastic element 142 and the fourth elastic element 144. Alternatively, the first adjusting member 125 and the second adjusting member 126 may be adjusting nuts, and the first supporting member 121 and the second supporting member 122 are provided with external threads adapted to the adjusting nuts, and the distance from the adjusting nuts to the first surface 111 of the bracket 110, that is, the moving distance of the third elastic member 143 and the fourth elastic member 144, can be changed by screwing or unscrewing the adjusting nuts. If the adjustment nuts are further tightened, the initial expansion and contraction lengths of the first elastic member 141, the second elastic member 142, the third elastic member 143, and the fourth elastic member 144 can be further adjusted. It is easy to understand that by changing the moving stroke of the second elastic element 142 and the fourth elastic element 144, or the initial extension length of the first elastic element 141, the second elastic element 142, the third elastic element 143 and the fourth elastic element 144, the damping force of the spring can be adjusted to adapt to the damping effect required by the engineering machine under various different working conditions. In addition, through the initial telescopic adjustment of the spring in the damping component 140, the amplitude of the allowed steel wire rope can be adjusted, the steel wire rope is efficiently prevented from exceeding the range of the arm support, and the rope jumping prevention effect is better.

It should be noted that in the present embodiment, the shock absorbing assembly 140 is shown to include four springs, and in other alternative embodiments, the number of the springs may be two, such as only including the first elastic member 141 and the second elastic member 142, as shown in fig. 2; alternatively, only the third elastic member 143 and the fourth elastic member 144 may be included, as shown in fig. 3, to perform the buffering and damping functions, or one or more elastic members may be provided according to a suitable deformation structure of the retainer ring 120, as long as the elastic members perform the buffering and damping functions, and this is not particularly limited. Optionally, the elastic member on the first supporting member 121 and the spring on the second supporting member 122 have the same elastic coefficient and type, which is beneficial to make the stress on the retainer ring 120 more balanced, and the structure is more reliable and durable. In addition, the damping assembly 140 may also be made of other elastic elements such as elastic sheets, rubber pads, etc., and is not limited herein.

Further, in this embodiment, the rope skipping prevention structure 100 further includes a stopper 150, the stopper 150 is fixedly connected to the bracket 110, and the stopper 150 and the retainer ring 120 together form a receiving frame. The stop 150 can provide a certain protection for the bracket 110, and the structure is more firm. The stopper 150 is disposed in the receiving frame, that is, the stopper 150 is disposed at one side of the second surface 112 of the bracket 110 and between the first support 121 and the second support 122. Thus, the range of movement of the cable is limited between the first support 121, the second support 122, and the U-shaped bottom of the baffle 120 and the stop 150. Optionally, the two ends of the stopper 150 are respectively provided with a mounting portion 151, the mounting portion 151 is fixedly connected to the bracket 110 through a bolt, and a through hole (not shown) for passing through the first supporting member 121 and the second supporting member 122 is formed in the mounting portion 151. Of course, the stopper 150 can be fixedly connected to the bracket 110 by welding, clipping, etc., without being limited thereto.

The bracket 110 is further provided with a mounting bracket 160 for connecting with the arm support, the mounting bracket 160 is arranged on one side of the second surface 112 of the bracket 110, and the mounting bracket 160 is fixed on the bracket 110 through bolts, or the mounting bracket 160 is fixedly connected with the bracket 110 through welding, clamping and the like. In addition, the check ring 120 is further provided with a safety rope 170, one end of the safety rope 170 is connected with the check ring 120, the other end of the safety rope 170 is directly connected with the arm support, and the safety rope 170 can play a role in preventing the check ring 120 from falling. If the retainer ring 120 and the bracket 110 break down, the retainer ring 120 and the bracket 110 are separated, and the safety rope 170 can prevent the retainer ring 120 from falling off, so that the safety is improved. It will be readily appreciated that the safety line 170 may be attached to any portion of the collar 120 and is not specifically limited thereto. In this embodiment, one side of the retainer ring 120, which is away from the accommodating frame, is provided with the hanging ring 171, the hanging ring 171 is used for being connected with the safety rope 170, and the hanging ring 171 is arranged outside the accommodating frame, so that impact and friction between the hanging ring 171 and a steel wire rope in the accommodating frame are reduced, the structure is reliable, the safety is higher, and the service life of parts such as the safety rope 170 is prolonged.

The installation process and the working principle of the rope skipping prevention structure 100 provided by the embodiment are as follows:

the stopper 150 is fixedly mounted on the second surface 112 of the bracket 110, the first support member 121 is sleeved with the first elastic member 141, the second support member 122 is sleeved with the second elastic member 142, the first support member 121 is sequentially inserted into the through hole of the mounting portion 151 and the first guide hole of the bracket 110 in the insertion direction from the second surface 112 to the first surface 111 of the bracket 110, the second support member 122 is respectively inserted into the through hole of the mounting portion 151 and the second guide hole of the bracket 110 in the insertion direction from the second surface 112 to the first surface 111 of the bracket 110, the U-shaped bottom of the retainer ring 120 is located on one side of the second surface 112 of the bracket 110 after insertion, the first elastic member 141 is abutted between the first stopper 123 and the mounting portion 151 at one end of the stopper 150, and the second elastic member 142 is abutted between the second stopper 124 and the mounting portion 151 at the other end of the stopper 150. The third elastic element 143 is disposed on a side of the first supporting element 121 close to the first surface 111 of the bracket 110, and the first adjusting element 125 is mounted thereon, and the fourth elastic element 144 is disposed on a side of the second supporting element 122 close to the first surface 111 of the bracket 110, and the second adjusting element 126 is mounted thereon. Finally, the bracket 110 is mounted on the arm support through the mounting frame 160, one end of the safety rope 170 is connected with the check ring 120, and the other end is connected with the arm support.

When the crane works in dynamic compaction, pile pulling, grab bucket flushing, power hammer and the like, the rope skipping prevention structure 100 in the embodiment is flexible, has active defense, and well slows down the impact of a steel wire rope. In the operation process, the steel wire rope swings upwards to impact the U-shaped bottom of the retainer ring 120, the retainer ring 120 moves upwards due to strong impact force, the third elastic part 143 and the fourth elastic part 144 of the first surface 111 of the bracket 110 are compressed to play a role in buffering, the contact time is prolonged, and the impulse is reduced. When the upward movement of the steel wire rope is finished, the strong acting forces of the third elastic member 143 and the fourth elastic member 144 are instantaneously out of balance, the retainer ring 120 moves downward at an accelerated speed, the first elastic member 141 and the second elastic member 142 on the second surface 112 of the bracket 110 are compressed to play a role of buffering, the contact time is increased, and the impulse is reduced. Utilize damper 140's ingenious setting, fine avoidance wire rope rocks powerful effort and strikes retaining ring 120 and dog 150, and buffering shock attenuation is effectual, reduces wire rope and rocks the range, effectively avoids wire rope to jump.

The axial movement of the first adjusting member 125 on the first support 121 and the axial movement of the second adjusting member 126 on the second support 122 can adjust the initial extension and contraction of the spring in the shock absorbing assembly 140 to adjust the allowable amplitude of the wire rope, thereby effectively preventing the wire rope from exceeding the range of the boom. In the embodiment, the amplitude of the steel wire rope is reduced through the damping of the damping component 140, the kinetic energy of the steel wire rope is converted into the elastic potential energy, the good energy conversion is realized, the impact is relieved, the reliability is high, the use cost and the maintenance cost are reduced, and the economy of the whole machine is improved.

The embodiment of the invention also provides engineering machinery, which comprises an arm support and the rope skipping prevention structure 100 in any one of the above embodiments, wherein the rope skipping prevention structure 100 is installed on the arm support. The rope skipping prevention structure 100 comprises a support 110, a retainer ring 120 and a shock absorption assembly 140, wherein the retainer ring 120 is movably connected to the support 110, the support 110 and the retainer ring 120 jointly form an accommodating frame, the accommodating frame is used for a steel wire rope to pass through, and the shock absorption assembly 140 is respectively connected with the retainer ring 120 and the support 110; the shock absorbing assembly 140 is used for reducing the motion amplitude of the steel wire rope in the accommodating frame. The construction machine may be a crane, a high-altitude vehicle or other machine applied to the wire rope field, and is not particularly limited herein. It should be noted that the steel wire rope is a rope commonly used in the operation process of the engineering machinery, and the rope skipping prevention structure 100 in the embodiment is also applicable to other types of cables, cables and the like.

In summary, the embodiment of the present invention provides an anti-rope-skipping structure 100 and an engineering machine, which have the following beneficial effects:

the rope skipping prevention structure 100 is applied to engineering machinery, kinetic energy of a steel wire rope can be converted into elastic potential energy by arranging the shock absorption assembly 140, the amplitude of the steel wire rope is reduced through damping, and impact and friction of the steel wire rope on the retainer ring 120 are reduced; the initial extension and contraction of the spring in the shock absorption assembly 140 can be adjusted to adjust the allowable amplitude of the steel wire rope, so that the steel wire rope is effectively prevented from exceeding the range of the arm support. Simple structure alleviates the impact, and the reliability is high, reduces use cost, maintenance cost, improves complete machine economic nature. In addition, the safety rope 170 can further improve the safety of the whole machine.

The engineering machinery comprises the rope skipping prevention structure 100, can efficiently prevent the steel wire rope from crossing the range of the arm support, realizes good energy conversion, converts kinetic energy of the steel wire rope into elastic potential energy, plays a role in buffering and damping, is high in reliability and long in service life, reduces use cost and maintenance cost, and improves the economy of the whole machine.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. An anti-rope-skipping structure is characterized by comprising a support (110), a retainer ring (120) and a shock absorption assembly (140), wherein the retainer ring (120) is movably connected to the support (110), the support (110) and the retainer ring (120) jointly form an accommodating frame, a steel wire rope passes through the accommodating frame, and the shock absorption assembly (140) is respectively connected with the retainer ring (120) and the support (110); the shock absorption assembly (140) is used for reducing the motion amplitude of the steel wire rope in the accommodating frame.

2. The rope skipping prevention structure according to claim 1, wherein a stopper is disposed on the retainer ring (120), and the shock absorbing assembly (140) is disposed between the bracket (110) and the stopper.

3. The anti-jump rope arrangement according to claim 2, wherein the shock-absorbing assembly (140) comprises a first elastic member (141) and a second elastic member (142), the retainer ring (120) comprises a first support member (121) and a second support member (122) connected to each other, the first support member (121) and the second support member (122) are movably connected to the bracket (110), respectively, the first elastic member (141) is connected to the first support member (121) and the bracket (110), respectively, and the second elastic member (142) is connected to the second support member (122) and the bracket (110), respectively.

4. The rope skipping prevention structure according to claim 3, wherein the limiting member comprises a first limiting member (123) and a second limiting member (124), the first limiting member (123) is disposed on the first support member (121), and the second limiting member (124) is disposed on the second support member (122);

the first elastic piece (141) is arranged between the support (110) and the first limiting block (123), and the second elastic piece (142) is arranged between the support (110) and the second limiting block (124).

5. The rope skipping prevention structure according to claim 4, wherein the first elastic member (141) and the second elastic member (142) are respectively springs, the first elastic member (141) is sleeved on the first support member (121), one end of the first elastic member (141) is connected with the bracket (110), and the other end of the first elastic member is abutted to the first limit block (123);

the second elastic piece (142) is sleeved on the second supporting piece (122), one end of the second elastic piece (142) is connected with the bracket (110), and the other end of the second elastic piece is abutted against the second limiting block (124).

6. The rope skipping prevention structure according to claim 3, wherein the bracket (110) is provided with a first guide hole and a second guide hole, the first support member (121) is inserted into and movable along the first guide hole, and the second support member (122) is inserted into and movable along the second guide hole.

7. The anti-skipping rope structure according to claim 6, wherein the shock-absorbing assembly (140) further comprises a third elastic member (143) and a fourth elastic member (144), the first elastic member (141) and the third elastic member (143) are respectively sleeved on the first support member (121), the first elastic member (141) is positioned on one side of the bracket (110), and the third elastic member (143) is positioned on the other side of the bracket (110);

the second elastic piece (142) and the fourth elastic piece (144) are respectively sleeved on the second supporting piece (122), the second elastic piece (142) is located on one side of the bracket (110), and the fourth elastic piece (144) is located on the other side of the bracket (110).

8. The rope skipping prevention structure according to claim 7, wherein a first adjusting piece (125) is arranged on the first support piece (121), and the third elastic piece (143) is connected with the first adjusting piece (125); a second adjusting piece (126) is arranged on the second supporting piece (122), and the fourth elastic piece (144) is connected with the second adjusting piece (126).

9. The rope skipping prevention structure according to claim 1, further comprising a stopper (150), wherein the stopper (150) is fixedly connected with the bracket (110), and the stopper (150) and the retainer ring (120) jointly form the accommodating frame.

10. Engineering machinery, characterized by comprising an arm support and an anti-jump rope structure according to any one of claims 1 to 9, wherein the anti-jump rope structure is mounted on the arm support.

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