CN215626258U

CN215626258U - Crane counterweight mechanism and crane

Info

Publication number: CN215626258U
Application number: CN202121943973.0U
Authority: CN
Inventors: 杜婷; 刘灿伦
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-25
Anticipated expiration: 2031-08-18

Abstract

The utility model provides a crane counterweight mechanism and a crane, wherein the crane counterweight mechanism comprises a counterweight body, a lifting cylinder and a limiting piece, wherein the counterweight body is provided with a through mounting hole; the lifting cylinder is movably inserted in the through mounting hole and can move up and down in the through mounting hole; the locating part can be dismantled with a promotion section of thick bamboo and be connected, and when a promotion section of thick bamboo stretches out and upwards lifts in the through-going mounting hole, the locating part can restrict the bottom of a promotion section of thick bamboo and enter into the counter weight internally. According to the utility model, a lifting lug connection mode with a movable limiting part is adopted, the force transmission mode is changed, most of the shear stress borne by the bottom counterweight suspension load is transmitted to the lifting lug of the lifting cylinder, and the local stress value is reduced; the shear stress borne by the thread mounting seat during the weight hoisting is greatly avoided, the thread mounting seat becomes a movable hoisting point, the service life of the counter weight is prolonged, and the fixing seat is ensured to be always close to the upper counter weight and the lower counter weight during the weight hoisting.

Description

Crane counterweight mechanism and crane

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a crane counterweight mechanism and a crane.

Background

At present, a counterweight assembly of a common mobile crane generally comprises an upper counterweight and a bottom counterweight, and is basically lifted by a crane lifting cylinder or lifted to a proper position by a crane through a crane lifting cylinder by using a fixed lifting lug or a fixed lifting point to install and use the counterweight.

The bottom balance weight is lifted and installed by the balance weight lifting oil cylinder, only a thread point used for installation can be used as a lifting point, and the balance weight is fixed by a balance weight lifting screw to lift and install. When the mobile crane is operated, a counterweight, a bottom counterweight and the like need to be installed according to working condition requirements, and a counterweight pulling screw needs to be installed before the bottom counterweight is installed, so that the counterweight becomes a lifting point of the bottom counterweight. The bottom counter weight is repeatedly disassembled and used and repeatedly assembled and re-pulled to deform the screw, the thread mounting hole is easily damaged due to the deformation of the bottom counter weight when the screw is lifted, the normal lifting is influenced, the service life of the bottom counter weight fixing thread point is shortened, and therefore the reliability of a product is reduced, and even serious consequences are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crane counterweight mechanism and a crane, and aims to solve the technical problem that the service life of a bottom counterweight is shortened due to frequent plugging and unplugging of a threaded hole in the bottom counterweight in the prior art.

In order to achieve the above object, the present invention provides a crane counterweight mechanism, including:

the counterweight body is provided with a through mounting hole;

the lifting cylinder is movably inserted in the through mounting hole and can move up and down;

and the limiting part is detachably connected to the bottom end of the lifting barrel and used for preventing the lifting barrel lifted upwards from being separated from the counterweight body.

In an embodiment of the present invention, the limiting member is a pin plate, and the bottom end of the lifting cylinder is provided with a radial through hole, and the pin plate is connected to the radial through hole.

In the embodiment of the utility model, the through mounting hole comprises a circular through hole which is in plug fit with the lifting cylinder, square counterbores which extend outwards in the radial direction and are arranged in a penetrating manner are respectively formed at two ends of the circular through hole, and the plug pin plate can penetrate through the through mounting hole in an aligned manner.

In an embodiment of the utility model, the counterweight body comprises a bottom counterweight and an upper counterweight arranged on the bottom counterweight, and the upper counterweight and the bottom counterweight are both provided with a plurality of through mounting holes and are arranged in a one-to-one correspondence manner.

In the embodiment of the utility model, the top surface of the bottom counterweight is provided with a plurality of positioning lugs, and the bottom surface of the upper counterweight is correspondingly provided with a plurality of alignment clamping grooves which are respectively clamped with the positioning lugs.

In the embodiment of the utility model, the top end of the lifting cylinder is provided with a lifting lug for connecting with a hoisting mechanism of a crane, the top surface of the upper counterweight is provided with a top surface sinking groove coaxial with the through mounting hole, and the lifting lug can be hidden in the top surface sinking groove.

In the embodiment of the utility model, the lifting lug radially penetrates through the lifting cylinder, and two ends of the lifting lug are respectively provided with a lifting connecting hole.

In the embodiment of the utility model, the bottom surface of the bottom counterweight is provided with a plurality of bottom surface sunken grooves which are coaxial with the through mounting holes, and the bolt plate can be hidden in the bottom surface sunken grooves.

In an embodiment of the utility model, the lifting cylinder is a hollow cylindrical pin member.

In an embodiment of the present invention, a crane is also presented, which crane comprises a crane counterweight mechanism as described above.

Through the technical scheme, the crane counterweight mechanism provided by the embodiment of the utility model has the following beneficial effects:

offer the through-going mounting hole on the counterweight body, before lifting by crane, at first cross the promotion section of thick bamboo with the locating part and expose from the promotion section of thick bamboo, the promotion section of thick bamboo that has the locating part is worn out from the below that runs through the mounting hole, and with the promotion section of thick bamboo rotatory 90 in the through-going mounting hole, then the promotion section of thick bamboo is along running through the mounting hole rebound, when the bottom of promotion section of thick bamboo is close the below that runs through the mounting hole, the locating part plays certain limiting displacement to the promotion section of thick bamboo, thereby prevent that the bottom of promotion section of thick bamboo from continuing to move up, and with the bottom of promotion section of thick bamboo spacing in the outside that runs through the mounting hole, like this promote section of thick bamboo and run through between the mounting hole and no longer take place relative movement, the locating part has realized spacing to promoting. When the lifting is finished, the lifting cylinder moves downwards so as to penetrate out of the through mounting hole. The design avoids the occurrence of the adverse effect that the bottom counter weight falls off due to the fact that the lifting point of the screw is pulled out, namely the thread mounting seat and the bolt are broken to cause thread slipping on the basis of the original technical scheme. The assembly adjustment of screw thread mount pad and fixing base is for taking the promotion section of thick bamboo of lug, only makes corresponding change to the connection form of counter weight, adopts the promotion section of thick bamboo to connect between every counter weight body, rather than loaded down with trivial details one by one counter weight body screw removal. The lifting cylinder and the bottom counter weight are limited by the limiting piece, so that the service life of the counter weight is prolonged, the structure is light and simple, the working difficulty is greatly reduced, the hoisting and dismounting processes are simplified, the production cost is reduced, and the assembly precision is improved.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a counterweight mechanism of a crane according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a lifting drum of a counterweight mechanism of a crane according to an embodiment of the utility model;

FIG. 3 is a schematic view of a connection structure of a bottom counterweight and a lifting cylinder in a counterweight mechanism of a crane according to an embodiment of the utility model;

FIG. 4 is a schematic bottom view of a bottom counterweight in a crane counterweight mechanism according to one embodiment of the utility model.

Description of the reference numerals

1 upper counterweight and 3 bottom counterweights

11 top surface sink 31 positioning projection

2 lifting cylinder 33 bottom sink

21 the lifting lug 32 penetrates through the mounting hole

211 bolt board 321 circular through hole

322 square hole enlargement

Detailed Description

The following detailed description of specific embodiments of the utility model refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the utility model and are not restrictive thereof.

A crane counterweight mechanism according to the utility model is described below with reference to the accompanying drawings.

In an embodiment of the present invention, a crane counterweight mechanism is provided, which includes a counterweight body, a lifting cylinder 2, and a limiting member; the counterweight body is provided with a through mounting hole 32; the lifting cylinder 2 is movably inserted in the through mounting hole 32 and can move up and down; the limiting part is detachably connected to the bottom end of the lifting cylinder 2 and used for preventing the lifting cylinder 2 lifted upwards from being separated from the counterweight body.

In the embodiment of the present invention, referring to fig. 1, a through mounting hole 32 is formed in the counterweight body, before hoisting, a limiting member is first passed through the lifting cylinder 2 and exposed from the lifting cylinder 2, the lifting cylinder 2 with the limiting member is passed out from below the through mounting hole 32, the lifting cylinder 2 is rotated 90 ° in the through mounting hole 32, and then the lifting cylinder 2 moves upward along the through mounting hole 32, when the bottom of the lifting cylinder 2 approaches the lower side of the through mounting hole 32, the limiting member limits the lifting cylinder 2 to a certain extent, thereby preventing the bottom of the lifting cylinder 2 from moving upward, and limiting the bottom of the lifting cylinder 2 to the outside of the through mounting hole 32, so that no relative movement occurs between the lifting cylinder 2 and the through mounting hole 32, and the limiting member limits the lifting cylinder 2. When the hoisting is finished, the lifting cylinder 2 is moved downward so as to be able to pass through the through-fitting hole 32. Wherein, the effect of locating part is exactly the card between a promotion section of thick bamboo 2 and end counter weight 3, and the relative displacement of a restriction promotion section of thick bamboo 2 and end counter weight 3 plays the effect that makes a promotion section of thick bamboo 2 drive end counter weight 3 when lifting by crane. The design avoids the occurrence of the adverse effect that the bottom counter weight falls off due to the fact that the lifting point of the screw is pulled out, namely the thread mounting seat and the bolt are broken to cause thread slipping on the basis of the original technical scheme. The assembly adjustment of screw thread mount pad and fixing base is for taking the promotion section of thick bamboo 2 of lug, only makes corresponding change to the connection form of counter weight, adopts the promotion section of thick bamboo 2 to connect. The lifting cylinder 2 and the bottom counter weight 3 are limited by the limiting piece, so that the service life of the counter weight is prolonged, the structure is light and simple, the working difficulty is greatly reduced, the hoisting process is simplified, the production cost is reduced, and the assembly precision is improved.

In the embodiment of the present invention, the limiting member is a pin plate 211, the bottom end of the lifting cylinder 2 is provided with a radial through hole, and the pin plate 211 is connected to the radial through hole.

Specifically, as shown in fig. 2, before hoisting, the latch plate 211 is inserted into a through hole at one end of the lifting cylinder 2 in alignment with the through hole at the other end, and then a part of the latch plate is inserted out of the through hole at the other end, so that the two ends of the latch plate 211, which penetrate out, are symmetrically distributed at the two ends of the lifting cylinder 2, thereby completing the movable installation of the latch plate 211 on the lifting cylinder 2; then the lower part of the installed lifting cylinder 2 is aligned with a through hole on the bottom counterweight 3 and directly penetrates into the counterweight body, and the rotation is carried out for 90 degrees, so that the lifting cylinder 2 and the counterweight body are relatively fixed, and the lifting cylinder 2 can be lifted along with the bottom counterweight 3, as shown in an assembly mode shown in fig. 3. After the counterweight body is lifted, the whole counterweight mechanism can be disassembled, the lifting cylinder 2 is rotated by 90 degrees to remove the fixation between the lifting cylinder 2 and the bottom counterweight 3, then the lifting cylinder 2 is directly moved out, and finally the bolt plate 211 is disassembled from the lifting cylinder 2 to complete the disassembly.

In the embodiment of the present invention, the through mounting hole 32 includes a circular through hole 321 inserted into the lifting cylinder 2, both ends of the circular through hole 321 are respectively formed with a square counterbore 322 extending radially outward and arranged through, and the latch plate 211 can pass through the through mounting hole 32 in an aligned manner.

In order to enable the bolt plate 211 to penetrate out of or into the through mounting hole 32, the shape of the square counterbore 322 is matched with that of the bolt plate 211, so that a gap can be avoided as much as possible, the stability of the whole crane counterweight system is improved, and accidents are reduced. The radius of the circular through hole 321 is slightly larger than the outer diameter of the lifting cylinder 2, so that the lifting cylinder 2 can rotate more smoothly, and the latch plate 211 can be mounted more smoothly. After the center of the square counterbored hole 322 coincides with the center of the circular through hole 321, the whole pattern penetrating through the mounting hole 32 is symmetrical, so that the lifting cylinder 2 and the plug board 211 are symmetrical on the premise that the lifting cylinder 2 and the plug board 211 enter, and thus the two sides of the plug board 211 protruding out of the lifting cylinder 2 are symmetrical, and in the lifting process, the two protruding sides play a role of bearing all weights of the counter weight 1 and the bottom counter weight 3 on the counter weight. Therefore, under the condition that the bolt plates 211 protrude out of two sides of the lifting cylinder 2 and are symmetrical, the whole device is stressed uniformly, and the balance weight can be lifted stably.

In the embodiment of the present invention, the counterweight body includes a bottom counterweight 3 and an upper counterweight 1 disposed on the bottom counterweight 3, and the upper counterweight 1 and the bottom counterweight 3 are both provided with a plurality of through mounting holes 32 and are arranged in a one-to-one correspondence. The weight of the balance weight can be flexibly adjusted by setting the balance weight bodies so as to adapt to the balance weight quality parameters required by the crane in different occasions. The counterweight 1 can be added when a large weight is needed, and the counterweight 1 can not be added when a small weight is needed. Since one lifting drum 2 cannot stably lift the counterweight, at least two lifting drums 2 are required for the crane counterweight mechanism. Each of the lift cylinders 2 is provided with a through-hole 32 at the same position of the upper balance weight 1 and the bottom balance weight 3 to form a passage so that the lift cylinder 2 can simultaneously pass through the upper balance weight 1 and the bottom balance weight 3 which are overlapped. This allows upper counterweight 1 and bottom counterweight 3 to be hoisted simultaneously.

In the embodiment of the present invention, the top surface of the bottom counterweight 3 is provided with a plurality of positioning bumps 31, and the bottom surface of the upper counterweight 1 is provided with a plurality of alignment slots respectively engaged with the positioning bumps 31. The counter weight 1 and the end counter weight 3 of counter weight pass through a plurality of location lugs 31 and counterpoint draw-in groove joint, and the stable concatenation that can be correct has not only restricted relative displacement between the upper and lower counter weight and has made the system stable together, can make the through mounting hole 32 correct of going up counter weight 1 and end counter weight 3 to be connected moreover, and a lifting cylinder 2 just can pass just.

In the embodiment of the present invention, a lifting lug 21 for connecting with a hoisting mechanism of a crane is arranged on the periphery of the lifting cylinder 2 near the top, the top surface of the upper counterweight 1 is provided with a top surface sunken groove 11 coaxial with the through mounting hole 32, and the lifting lug 21 can be hidden in the top surface sunken groove 11. The top surface sinking groove 11 is used for enabling the upper double lifting lugs 21 to rotate within the range of the top surface sinking groove 11 when the lifting cylinder 2 rotates in the installation process, so that the diameter of the top surface sinking groove 11 is larger than the distance between the outer ends of the two groups of lifting lugs 21, and one top surface sinking groove 11 is arranged at each position penetrating through the installation hole 32.

In the embodiment of the present invention, as shown in fig. 4, in the embodiment of the present invention, a plurality of bottom surface sunken grooves 33 coaxial with the through mounting holes 32 are formed in the bottom surface of the bottom counterweight 3, and the latch plate 211 can be hidden in the bottom surface sunken grooves 33. After the lifting barrel 2 and the latch plate 211 enter the through mounting hole 32, the latch plate 211 and the lifting barrel 2 start to rotate, the latch plate 211 rotates in the bottom sunken groove 33, and when two sides of the latch plate 211 are separated from the through mounting hole 32 and completely enter the bottom sunken groove 33, the lifting barrel 2 and the latch plate 211 are fixed with the upper counterweight 1 and the bottom counterweight 3. The bottom surface undercut 33 has a diameter greater than the length of the latch plate 211 to provide space for rotation of the latch plate 211.

In an embodiment of the utility model, the lifting cylinder 2 is a hollow cylindrical pin member, as shown in fig. 3. During hoisting, the hoisting mechanism is hung on the lifting lug 21, and the lifting of the hoisting mechanism drives the lifting lug 21 and the lifting cylinder 2 to ascend. The cross section of the lifting cylinder 2 is circular so as to be rotatable in the through-hole 32. The lifting lug 21 above the lifting cylinder 2 is arranged because when the weight assembly is used for lifting weight in the original crane counterweight mechanism, the lifting cylinder 2 is subjected to the force transmitted by the previous counterweight and is lifted by the lifting hinge, the direction of the force borne by the lifting cylinder 2 and the lifting lug 21 and the axis of the hinge form a certain angle, thus when the force is transmitted to the bottom counterweight 3, a component force perpendicular to the axial direction can be generated, namely, shearing stress can be generated, the shearing stress is very small compared with the positive pressure borne by the existing scheme, the influence on the lifting lug 21 is small, and the shearing stress borne by the screw connecting the fixed seat and the threaded mounting seat compared with the original scheme is greatly reduced, the phenomenon that the fixed seat falls off due to fatigue fracture caused by bearing of overlarge shearing force of the screw is avoided, the service life of the bottom counterweight 3 is prolonged, and the disassembly is convenient.

In the embodiment of the present invention, the lifting lugs 21 on the lifting cylinder 2 are two in number and symmetrically arranged on the periphery of the lifting cylinder 2. Lifting lugs 21 are arranged on two sides of the lifting cylinder 2, so that the force angle of the lifting lugs 21 of the lifting hinge can be adjusted no matter how the lifting cylinder 2 rotates. And more lifting lugs 21 are connected with the lifting hinges, so that the counterweight can be more stable and safer during lifting.

In an embodiment of the present invention, a crane is further provided, where the crane includes the crane counterweight mechanism described above, and since the crane employs all embodiments of the crane counterweight mechanism described above, the crane has the beneficial effects brought by all embodiments described above.

In the embodiments of the present invention, in the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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 and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A crane counterweight mechanism, comprising:

a counterweight body provided with a through mounting hole (32);

the lifting cylinder (2) is movably inserted in the through mounting hole (32) and can move up and down;

the limiting piece is detachably connected to the bottom end of the lifting cylinder (2) and used for preventing the lifting cylinder (2) which is lifted upwards from being separated from the counterweight body.

2. The crane counterweight mechanism according to claim 1, characterized in that said limiting member is a latch plate (211), a radial through hole is provided at the bottom end of said lifting cylinder (2), and said latch plate (211) is connected to said radial through hole.

3. The crane counterweight mechanism according to claim 2, wherein the through mounting hole (32) comprises a circular through hole (321) which is in plug fit with the lifting cylinder (2), square counterbores (322) which extend outwards in the radial direction and are arranged in a penetrating manner are respectively formed at two ends of the circular through hole (321), and the latch plate (211) can penetrate through the through mounting hole (32) in an aligned manner.

4. A crane counterweight mechanism as defined in claim 3, wherein said counterweight body comprises a bottom counterweight (3) and an upper counterweight (1) disposed on said bottom counterweight (3), said upper counterweight (1) and said bottom counterweight (3) each having a plurality of said through mounting holes (32) and being arranged in a one-to-one correspondence.

5. The crane counterweight mechanism according to claim 4, wherein a plurality of positioning projections (31) are arranged on the top surface of the bottom counterweight (3), and a plurality of alignment slots respectively clamped with the positioning projections (31) are correspondingly arranged on the bottom surface of the upper counterweight (1).

6. The crane counterweight mechanism according to claim 4, wherein the top end of the lifting cylinder (2) is provided with a lifting lug (21) for connecting with a hoisting mechanism of a crane, the top surface of the upper counterweight (1) is provided with a top surface sunken groove (11) coaxial with the through mounting hole (32), and the lifting lug (21) can be hidden in the top surface sunken groove (11).

7. The crane counterweight mechanism according to claim 6, wherein the lifting lug (21) radially penetrates the lifting cylinder (2) and is provided with a lifting connection hole at each end.

8. The crane counterweight mechanism according to claim 4, characterized in that the bottom surface of the bottom counterweight (3) is provided with a plurality of bottom surface sunken grooves (33) coaxial with the through mounting holes (32), and the latch plate (211) can be hidden in the bottom surface sunken grooves (33).

9. Crane counterweight mechanism according to any of the claims 1-8, characterized in that the lifting drum (2) is a hollow cylindrical plug member.

10. A crane, characterized in that the crane comprises a crane counterweight mechanism according to any one of claims 1 to 9.