CN219408858U - Limit structure and hoisting system - Google Patents

Abstract

The utility model relates to the technical field of lifting equipment, and provides a limiting structure and a lifting system. The limit structure comprises a balancing weight component, a balancing weight connecting rope and a lengthening section. The balancing weight component is provided with a penetrating hole. The penetrating hole is used for penetrating the main winch connecting rope. The balancing weight component is connected with the pulley yoke through a balancing weight connecting rope. An extension joint is connected between the balancing weight component and the balancing weight connecting rope. The lengthening joint is used for adjusting the gravity center of the balancing weight component so as to center the penetrating hole with the main winch connecting rope. Through being provided with the extension section on the balancing weight subassembly, through the length of adjusting the extension section, can change the center of balancing weight subassembly, and then, can adjust the position of wearing to establish the hole on the balancing weight subassembly to make to wear to establish hole and main hoist connection rope centering, promptly, make the central axis of wearing to establish the hole and the central axis coincidence of main hoist connection rope. Therefore, friction between the main winch connecting rope and the side wall of the penetrating hole in the lifting process can be avoided, and the limiting accuracy of the limiting structure is further improved.

Description

Limit structure and hoisting system

Technical Field

The utility model relates to the technical field of lifting equipment, in particular to a limiting structure and a lifting system.

Background

In order to avoid overload of the main winch caused by collision between the lifting pulley and the elevator in the process of lifting the working device of the double-wheel groove milling machine, a limiting structure is usually arranged between the lifting pulley and the elevator. One end of the main winch wire rope is connected with the main winch, and the other end of the main winch wire rope penetrates through a penetrating hole in the limiting structure and the lifting pulley and is connected with the pulley frame or the frame. The limiting structure is connected with the pulley yoke through a fixed steel wire rope. A limit switch is arranged between the fixed steel wire rope and the pulley frame. When the lifting pulley is lifted to the position of the jacking limit structure, the pull force action of the limit structure on the fixed steel wire rope is reduced, the limit switch is closed, and the main winch stops working.

The direction of the hole can not be adjusted through the existing limiting structure, when deviation exists between the hole and the central axis of the main hoisting steel wire rope, friction can occur between the main hoisting steel wire rope and the inner side wall of the hole in the hoisting process, the stress state of the fixed steel wire rope is affected, and the limiting accuracy of the limiting device is poor.

Disclosure of Invention

The utility model provides a limiting structure and a lifting system, which are used for solving the problems that the direction of a penetrating hole of the existing limiting structure cannot be adjusted, the main winch steel wire rope may rub against the inner side wall of the penetrating hole, the stress state of a fixed steel wire rope is affected, and the limiting accuracy of a limiting device is poor.

According to a first aspect of the present utility model, a limiting structure is provided for limiting the height of a working device of a two-wheel slot milling machine, including a counterweight assembly, a counterweight connecting rope and an extension joint.

Wherein, be provided with on the balancing weight subassembly and wear to establish the hole. The penetrating hole is used for penetrating the main winch connecting rope. The balancing weight component is connected with the pulley frame through the balancing weight connecting rope. An extension joint is connected between the balancing weight component and the counterweight connecting rope. The lengthening joint is used for adjusting the gravity center of the balancing weight component so that the penetrating hole is centered with the main winch connecting rope.

According to the limiting structure provided by the utility model, the balancing weight assembly comprises a balancing weight main body. The through hole includes a first hole. The first hole is located on the counterweight body.

The counterweight connection rope includes a first connection rope and a second connection rope. One end of the balancing weight main body is connected with the pulley frame through the first connecting rope, and the other end of the balancing weight main body is connected with the lengthening section. The lengthening joint is connected with the pulley frame through the second connecting rope.

According to the limiting structure provided by the utility model, the balancing weight assembly further comprises a U-shaped rod. The through hole further comprises a second hole. The U-shaped rod is connected with the balancing weight main body. The U-shaped rod extends to the outer side of the second connecting rope, and the second hole is formed in the outer side of the second connecting rope.

According to the limiting structure provided by the utility model, the balancing weight main body comprises a balancing weight connecting plate and a plurality of balancing weight blocks. And a plurality of counterweight blocks are connected to the counterweight connecting plate and spliced to form the first hole.

According to the limiting structure provided by the utility model, the counterweight block body is connected with the counterweight connecting plate through the fastening piece. The counterweight connecting plate is provided with a strip-shaped hole matched with the first hole. A plurality of connecting holes matched with the fasteners are formed in the counterweight connecting plate at intervals.

According to the limiting structure provided by the utility model, the connecting rod is connected to the opening end of the U-shaped rod. The diameter of the connecting rod is smaller than that of the U-shaped rod. The connecting rod is connected to the counterweight connecting plate in a penetrating way.

According to the limiting structure provided by the utility model, the limiting structure further comprises a limiting switch. The limit switch is arranged between the pulley frame and the first connecting rope or the second connecting rope.

According to the limiting structure provided by the utility model, the limiting structure further comprises a control device. The control device is connected with the limit switch and the main winch.

According to the limiting structure provided by the utility model, the lengthening joint is a telescopic rod.

According to a second aspect of the present utility model there is provided a hoisting system comprising a main hoisting, a main hoisting connection rope, a hoisting sheave, a sheave frame and a limit structure as described above.

One end of the main winch connecting rope is connected with the main winch, and the other end of the main winch connecting rope penetrates through the penetrating hole and the lifting pulley and is connected with the pulley frame or the frame.

In the limiting structure provided by the utility model, the counterweight block assembly is provided with the penetrating hole for penetrating the main winch connecting rope. The balancing weight component is fixedly connected with the pulley yoke through a counterweight connecting rope. Be provided with the extension festival on the balancing weight subassembly, through the length of adjusting the extension festival, can change the center of balancing weight subassembly, and then, can adjust the position of wearing to establish the hole on the balancing weight subassembly to make to wear to establish hole and main hoist connection rope centering, promptly, make the central axis of wearing to establish the hole and the central axis coincidence of main hoist connection rope. Therefore, friction between the main winch connecting rope and the side wall of the penetrating hole in the lifting process can be avoided, and the limiting accuracy of the limiting structure is further improved.

Further, since the hoisting system comprises the limit structure as described above, it also has the advantages as described above.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a limit structure provided by the present utility model;

FIG. 2 is a schematic top view of the weight assembly of FIG. 1;

reference numerals:

101. a counterweight body; 102. a counterweight connection plate; 103. a counterweight block; 104. a first hole; 105. a U-shaped rod; 106. a second hole; 107. a fastener; 201. a first connecting rope; 202. a second connecting rope; 300. a lengthening section; 400. and a limit switch.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, described in this specification may be combined and combined to further clarify the objects, aspects and advantages of embodiments of the present utility model, without departing from the spirit and scope of the utility model, and it should be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A limiting structure and a lifting system according to an embodiment of the present utility model are described below with reference to fig. 1 and 2. It should be understood that the following description is only illustrative of the embodiments of the utility model and is not intended to limit the utility model in any way.

Embodiments of the first aspect of the present utility model provide a limiting structure and a hoisting system, as shown in fig. 1 and 2, where the limiting structure is used to limit the height of a working device of a two-wheel milling machine, and the limiting structure includes a counterweight assembly, a counterweight connecting rope and an extension joint 300.

Wherein, be provided with on the balancing weight subassembly and wear to establish the hole. The penetrating hole is used for penetrating the main winch connecting rope. The balancing weight component is connected with the pulley yoke through a balancing weight connecting rope. An extension joint 300 is connected between the counterweight block and the counterweight connection rope. Extension 300 is used to adjust the center of gravity of the counterweight assembly to center the pierced hole with the main hoist connecting rope.

In the limiting structure provided by the utility model, the counterweight block assembly is provided with the penetrating hole for penetrating the main winch connecting rope. The balancing weight component is fixedly connected with the pulley yoke through a counterweight connecting rope. Be provided with extension section 300 on the balancing weight subassembly, through the length of adjusting extension section 300, can change the center of balancing weight subassembly, and then, can adjust the position of wearing to establish the hole on the balancing weight subassembly to make to wear to establish hole and main hoist connection rope centering, promptly, make the central axis of wearing to establish the hole and the central axis coincidence of main hoist connection rope. Therefore, friction between the main winch connecting rope and the side wall of the penetrating hole in the lifting process can be avoided, and the limiting accuracy of the limiting structure is further improved.

In one embodiment of the utility model, the weight assembly includes a weight body 101. The through hole includes a first hole 104, and the first hole 104 is located on the counterweight body 101.

The counterweight connection rope includes a first connection rope 201 and a second connection rope 202. One end of the counterweight body 101 is connected with the pulley frame through a first connecting rope 201, the other end of the counterweight body 101 is connected with the extension joint 300, and the extension joint 300 is connected with the pulley frame through a second connecting rope 202.

Further, in one embodiment of the present utility model, the weight assembly further includes a U-shaped bar 105. The through hole further includes a second hole 106. The U-shaped rod 105 is connected to the weight body 101. The U-shaped bar 105 extends to the outside of the second connecting string 202, and a second hole 106 is formed at the outside of the second connecting string 202.

For example, as shown in fig. 1 and 2, in this embodiment, the right end of the weight body 101 is provided with an eye screw. One end of the first connection rope 201 is connected with the eye screw, and the other end of the first connection rope 201 is connected with the pulley frame. An extension 300 is connected to the left end of the counterweight body 101. The length of extension 300 is adjustable. For example, in one embodiment of the utility model, extension joint 300 is a telescoping rod construction. The left end of the extension 300 is provided with a eye screw. One end of the second connecting rope 202 is connected with the eye screw, and the other end of the second connecting rope 202 is connected with the pulley frame. The right end of the U-shaped rod 105 is an open end, the left end is a closed end, the open end is connected with the counterweight body 101, the closed end extends to the left side of the second connecting rope 202, and a second hole 106 is formed inside the U-shaped rod 105, and the second hole 106 is a strip-shaped hole. In actual use, the second bore 106 is located on the side adjacent the tubing assembly and the first bore 104 is located on the side adjacent the slurry tube. One end of the main winch connecting rope is connected with the main winch, and the other end of the main winch connecting rope sequentially passes through the first hole 104, the lifting pulley and the second hole 106 and then is connected with the pulley frame. The main winch is used for winding and unwinding the main winch connecting rope so as to enable the lifting pulley to lift, and further, the working device of the double-wheel slot milling machine connected with the lifting pulley is lifted.

It should be noted here that the main hoisting connecting rope, the first connecting rope 201 and the second connecting rope 202 all include, but are not limited to, steel wire ropes.

As can be seen from the above-described embodiments, the counterweight assembly is provided with a first hole 104 and a second hole 106 for threading the main hoisting connecting rope, and the first hole 104 is located between the first connecting rope 201 and the second connecting rope 202, and the second hole 106 is located on the side of the second connecting rope 202 away from the first connecting rope 201. Therefore, the problem that the main winch connecting rope and the counterweight connecting rope are wound due to rotation of the counterweight assembly can be prevented.

In one embodiment of the present utility model, the limit structure further includes a limit switch 400. The limit switch 400 is disposed between the pulley frame and the first connection rope 201 or the second connection rope 202.

In a further embodiment of the utility model, the limit structure further comprises a control device. The control device is connected with the limit switch 400 and the main winch.

Specifically, as shown in fig. 1, a limit switch 400 is installed between the pulley frame and the first connection string 201. The control device is connected with the limit switch 400 and the main winch. When the limit switch 400 is in the off state, the control device controls the main winch to perform normal winding action, and the main winch can wind the main winch connecting rope so as to enable the lifting pulley to rise. When the limit switch 400 is in the closed state, the control device controls the main winch to stop winding action so as to stop the lifting pulley from rising.

In the process of lifting the working device, when the lifting pulley does not reach the state of limiting lifting height, that is, when the lifting pulley and the counterweight body 101 are in a mutually separated state, under the action of gravity of the counterweight body 101, the counterweight steel wire rope can overcome the elasticity of the spring in the limit switch 400, so that the limit switch 400 is driven to be always kept in an off state. The main winch continuously winds the main winch connecting rope, and the lifting pulley continuously lifts upwards. When the lifting pulley reaches the limit lifting height, the lifting pulley pushes the counterweight main body 101 upwards, the downward pulling force applied to the counterweight steel wire rope is reduced, and the limit switch 400 is switched to the closed state. At this time, the main winding stops winding and the lifting pulley stops ascending.

It should be noted that, in the embodiment of the present utility model, the control device may be a conventional hardware control device such as a single chip microcomputer or a PLC. In other words, the control means of the present utility model need not be implemented by means of a software program, and can be executed by means of hardware devices or hardware circuits.

In one embodiment of the present utility model, the weight body 101 includes a weight connection plate 102 and a plurality of weight blocks 103. A plurality of weight blocks 103 are connected to the weight connection plate 102 and are spliced to form a first bore 104.

Further, in one embodiment of the utility model, the weight block 103 is connected to the weight connection plate 102 by fasteners 107. The weight connection plate 102 is provided with a bar-shaped hole adapted to the first hole 104. The counterweight connection plate 102 is provided with a plurality of connection holes at intervals, which are matched with the fasteners 107.

Still further, in one embodiment of the present utility model, a connecting rod is connected at the open end of the U-shaped bar 105. The diameter of the connecting rod is smaller than that of the U-shaped rod 105, and the connecting rod is connected to the counterweight connecting plate 102 in a penetrating way.

For example, as shown in fig. 1 and 2, in this embodiment, a weight body 101 includes a weight connection plate 102 and four weight blocks 103. Wherein, two weight blocks 103 are located on the upper side of the weight connecting plate 102, and the two weight blocks are spliced with each other to form a round hole. The other two weight blocks 103 are positioned at the lower side of the weight connecting plate 102, and are spliced with each other to form another round hole. The weight connection plate 102 has an elongated hole formed therein. The width of the strip-shaped hole is equal to the diameter of the two round holes on the upper side and the lower side of the strip-shaped hole. Together, the three form a first hole 104 for threading the main hoisting connecting rope. Each weight block 103 is connected with the weight connecting plate 102 through bolts. A plurality of connection holes are formed in the counterweight connection plate 102 at intervals to adjust the installation position of each counterweight block 103. A connecting rod is connected to the open end of the U-shaped rod 105. The diameter of the connecting rod is smaller than the diameter of the U-shaped rod 105. The diameter of the connecting rod perforation is larger than the diameter of the connecting rod, and the diameter of the connecting rod penetrating hole is smaller than the diameter of the U-shaped rod 105. The tail end of the connecting rod is provided with threads. The connecting rod is penetrated from one side of the weight connecting plate 102 to the other side of the weight connecting plate 102, and the tail end of the connecting rod is in locking connection with the weight connecting plate 102 through a nut.

Thus, by adjusting the mounting positions of the weight blocks 103, the center of gravity of the weight body 101 can be adjusted, and the azimuth adjustment range of the first hole 104 can be enlarged. Meanwhile, the U-shaped rods 105 and the counterweight blocks 103 are connected with the counterweight connecting plates 102 through fasteners, so that a main winch connecting rope does not need to be detached in the dismounting process, and the dismounting is convenient.

In addition, the center of gravity of the weight body 101 can be adjusted by installing weight blocks 103 of different masses or different shapes on the weight connection plate 102.

An embodiment of the second aspect of the present utility model provides a hoisting system comprising a main hoisting, a main hoisting connection rope, a hoisting sheave, a sheave frame and a limit structure as described above.

One end of the main winch connecting rope is connected with the main winch, and the other end of the main winch connecting rope penetrates through the penetrating hole and the lifting pulley and is connected with the pulley frame, or the other end of the main winch connecting rope penetrates through the penetrating hole, the lifting pulley and the pulley frame and is connected with the frame.

More specifically, the balancing weight component is fixedly connected with the pulley frame through a balancing weight connecting rope. A limit switch 400 is arranged between the counterweight connecting rope and the pulley frame. The balancing weight component is positioned between the elevator and the lifting pulley. One end of the main winch connecting rope is connected with the main winch, and the other end of the main winch connecting rope sequentially passes through the first hole 104, the lifting pulley and the second hole 106 and then is fixedly connected with the pulley frame. And hoisting the object to be hoisted on the hoisting pulley. When the lifting pulley is lifted to the limit height position of the lifting balancing weight component, the limit switch 400 is closed, and the main winch stops winding.

Further, since the hoisting system comprises the limit structure as described above, it also has the advantages as described above.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A limiting structure for limiting the height of a working device of a double-wheel slot milling machine is characterized by comprising a balancing weight component, a balancing weight connecting rope and a lengthening section,

the balancing weight assembly is provided with a penetrating hole, the penetrating hole is used for penetrating a main winch connecting rope, the balancing weight assembly is connected with the pulley frame through the balancing weight connecting rope, an extension joint is connected between the balancing weight assembly and the balancing weight connecting rope, and the extension joint is used for adjusting the gravity center of the balancing weight assembly so that the penetrating hole is centered with the main winch connecting rope.

2. The spacing structure of claim 1, wherein said weight assembly includes a weight body, said through hole includes a first hole, said first hole is located on said weight body,

the counterweight connection rope comprises a first connection rope and a second connection rope, one end of the counterweight main body is connected with the pulley frame through the first connection rope, the other end of the counterweight main body is connected with the lengthening section, and the lengthening section is connected with the pulley frame through the second connection rope.

3. The spacing structure of claim 2, wherein the weight assembly further comprises a U-shaped rod, the through hole further comprises a second hole, the U-shaped rod is connected with the weight body, the U-shaped rod extends to the outer side of the second connecting rope, and the second hole is formed at the outer side of the second connecting rope.

4. A spacing structure according to claim 3 wherein the weight body comprises a weight connection plate and a plurality of weight blocks connected to the weight connection plate and spliced to form the first aperture.

5. The spacing structure according to claim 4, wherein the weight block is connected with the weight connecting plate through a fastener, a strip-shaped hole adapted to the first hole is formed in the weight connecting plate, and a plurality of connecting holes adapted to the fastener are formed in the weight connecting plate at intervals.

6. The spacing structure according to claim 4 or 5, wherein a connecting rod is connected to the open end of the U-shaped rod, the diameter of the connecting rod is smaller than that of the U-shaped rod, and the connecting rod is connected to the counterweight connecting plate in a penetrating manner.

7. The spacing structure according to claim 2, further comprising a limit switch disposed between the pulley frame and the first connection rope or the second connection rope.

8. The spacing structure of claim 7, further comprising a control device coupled to the limit switch and the main winch.

9. The spacing structure according to any one of claims 1 to 5, wherein the extension joint is a telescopic rod.

10. A hoisting system comprising a main hoisting machine, a main hoisting connecting rope, a hoisting pulley, a pulley frame and a limit structure according to any one of claims 1 to 9,

one end of the main winch connecting rope is connected with the main winch, and the other end of the main winch connecting rope penetrates through the penetrating hole and the lifting pulley and is connected with the pulley frame or the frame.