CN219409032U - Five-section arm synchronous telescopic mechanism, telescopic arm and crane - Google Patents

Abstract

The utility model belongs to the technical field of hoisting machinery and provides a five-section arm synchronous telescopic mechanism, a telescopic arm and a crane, wherein the five-section arm synchronous telescopic mechanism comprises five-section arm sections, a driving oil cylinder and four groups of traction ropes which are sequentially sleeved, the driving oil cylinder is arranged between a first section arm and a second section arm, the first traction rope is wound on the root part of the second section arm, two ends of the first traction rope are respectively connected with the head part of the first section arm and the root part of a third section arm, the second traction rope is wound on a telescopic end, two ends of the second traction rope are respectively connected with the root part of the first section arm and the root part of a third section arm, the third traction rope is wound on the head part of the third section arm, two ends of the third traction rope are respectively connected with the root part of the second section arm and the root part of the fourth section arm, and the fourth traction rope is respectively connected with the root part of the fifth section arm.

Description

Five-section arm synchronous telescopic mechanism, telescopic arm and crane

Technical Field

The utility model belongs to the technical field of hoisting machinery, and particularly relates to a five-section arm synchronous telescopic mechanism, a telescopic arm and a crane.

Background

The telescopic mechanism is used as one of core components for realizing a telescopic function of the telescopic arm and generally consists of a telescopic oil cylinder and a plurality of groups of rope-row components, and according to different arrangement forms of the telescopic oil cylinder and the rope-row components, the telescopic mechanism can be generally divided into a synchronous telescopic mechanism and an asynchronous telescopic mechanism, wherein the synchronous telescopic mechanism can realize the telescopic of the arm section by only needing one group of oil cylinder, and has the advantages of low generation cost, small total weight of the mechanism and the like, so that the telescopic mechanism is widely applied. For the synchronous telescopic mechanism of five-section arm, the arrangement of the rope row assembly inside the synchronous telescopic mechanism is generally complex, as shown in fig. 1, an existing synchronous telescopic mechanism of five-section arm is shown, five sets of rope row assemblies are required to be arranged inside the telescopic mechanism, synchronous extension of the five-section arm is realized through the second traction rope group B, the third traction rope group C and the fifth traction rope group E, synchronous retraction of the arm support is realized through the first traction rope group A, the second traction rope group B and the fourth traction rope group D, namely, the telescopic mechanism needs five sets of rope row assemblies to realize normal extension and retraction of the arm support, the increase of the rope row assemblies necessarily leads to more complex structure in the telescopic arm, and assembly and disassembly maintenance are not facilitated, so how to simplify the structure of the synchronous telescopic mechanism of the five-section arm is a general research direction for a person skilled in the art.

Disclosure of Invention

Aiming at the defects or shortcomings, the utility model provides a five-section arm synchronous telescopic mechanism, a telescopic arm and a crane, and aims to solve the technical problem that the existing five-section arm synchronous telescopic mechanism is complex in structure due to the fact that the number of rope assemblies in the existing five-section arm synchronous telescopic mechanism is large.

In order to achieve the above object, the present utility model provides a five-link arm synchronous telescoping mechanism, wherein the five-link arm synchronous telescoping mechanism comprises an arm link assembly, a driving oil cylinder, a first traction rope, a second traction rope, a third traction rope and a fourth traction rope, the arm link assembly comprises a first link arm, a second link arm, a third link arm, a fourth link arm and a fifth link arm which are sequentially sleeved, the driving oil cylinder comprises a fixed end connected to the first link arm and a telescoping end connected to the second link arm, the first traction rope is wound on the root of the second link arm, two ends of the first traction rope are respectively connected with the head of the first link arm and the root of the fifth link arm, the second traction rope is wound on the telescoping end, two ends of the second traction rope are respectively connected with the root of the first link arm and the root of the third link arm, the third traction rope is wound on the head of the third link arm, two ends of the third traction rope is respectively connected with the root of the second link arm and the root of the fourth link arm, and the fourth traction rope is wound on the head of the fourth link arm, and two ends of the fourth traction rope are respectively connected with the root of the second link arm and the fifth link arm.

In the embodiment of the utility model, the root of the second knuckle arm is provided with a first pulley which is rotatably arranged, one end of the first traction rope is connected with the head of the first knuckle arm, and the other end of the first traction rope bypasses the first pulley and is rotated to traction the root of the fifth knuckle arm.

In the embodiment of the utility model, the root of the second arm and the head of the first arm are respectively provided with a second pulley and a third pulley, and the first traction rope sequentially passes through the first pulley, the third pulley and the second pulley and is connected with the root of the fifth arm.

In the embodiment of the utility model, the telescopic end is provided with a fourth pulley, one end of the second traction rope is connected with the root of the first knuckle arm, and the other end of the second traction rope passes through the fourth pulley and is connected with the root of the third knuckle arm.

In the embodiment of the utility model, the head of the third section arm is provided with a fifth pulley, one end of the third traction rope is connected with the root of the second section arm, and the other end of the third traction rope passes through the fifth pulley and is connected with the root of the fourth section arm.

In the embodiment of the utility model, the head of the fourth joint arm is provided with a sixth pulley, one end of the fourth traction rope is connected with the root of the second joint arm, and the other end of the fourth traction rope is wound around the sixth pulley and pulls the root of the fifth joint arm.

In the embodiment of the utility model, a seventh pulley is further arranged at the root of the fifth section arm, one end of the fourth traction rope is connected with the root of the second section arm, and the other end of the fourth traction rope is sequentially wound around the sixth pulley and the seventh pulley and is connected with the head of the fourth section arm.

In an embodiment of the utility model, the first traction rope, the second traction rope, the third traction rope and the fourth traction rope are traction steel wire ropes.

In order to achieve the above object, the present utility model further provides a telescopic arm, wherein the telescopic arm comprises the five-section arm synchronous telescopic mechanism according to the above.

To achieve the above object, the present utility model also provides a crane, wherein the crane comprises a telescopic boom according to the above.

Through the technical scheme, the five-section arm synchronous telescopic mechanism provided by the embodiment of the utility model has the following beneficial effects:

when the driving oil cylinder stretches, the second section arm is driven to stretch out, the second section arm stretches out and drives the third section arm to stretch out through the traction of the second traction rope, the third section arm stretches out and drives the fourth section arm to stretch out through the traction of the third traction rope, and the fourth section arm stretches out and drives the fifth section arm to stretch out through the fourth traction rope.

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

Drawings

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

FIG. 1 is a schematic diagram of a prior art five-arm synchronous telescoping mechanism;

fig. 2 is a schematic structural view of a five-arm synchronous telescopic mechanism according to an embodiment of the present utility model.

Description of the reference numerals

11. First arm 12 second arm

13. Third arm section 14 fourth arm section

15. Fifth section arm 2 driving oil cylinder

21. The fixed end 22 is telescopic

31. First traction rope 32 second traction rope

33. Third traction rope 34 fourth traction rope

41. First pulley 42 second pulley

43. Third pulley 44 fourth pulley

45. Fifth pulley 46 sixth pulley

47. Seventh pulley

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The five-arm synchronous telescoping mechanism of the present utility model is described below with reference to the drawings.

The utility model provides a five-section arm synchronous telescopic mechanism, as shown in fig. 2, which comprises:

the arm joint assembly comprises a first arm 11, a second arm 12, a third arm 13, a fourth arm 14 and a fifth arm 15 which are sequentially sleeved;

the driving oil cylinder 2 comprises a fixed end 21 connected to the first section arm 11 and a telescopic end 22 connected to the second section arm 12;

the first traction rope 31 is wound on the root of the second knuckle arm 12, and two ends of the first traction rope are respectively connected with the head of the first knuckle arm 11 and the fifth knuckle arm 15;

the second traction rope 32 is wound on the telescopic end 22, and two ends of the second traction rope are respectively connected with the root of the first arm 11 and the root of the third arm 13;

the third traction rope 33 is wound on the head of the third knuckle arm 13, and two ends of the third traction rope are respectively connected with the root of the second knuckle arm 12 and the root of the fourth knuckle arm 14; and

a fourth traction rope 34 is wound around the head of the fourth arm 14 and has both ends respectively connected to the root of the second arm 12 and the root of the fifth arm 15.

When the driving oil cylinder 2 stretches, the second joint arm 12 is driven to stretch out, the second joint arm 12 stretches out to drive the third joint arm 13 to stretch out through the traction of the second traction rope 32, the stretching of the third joint arm 13 stretches out to drive the fourth joint arm 14 to stretch out through the traction of the third traction rope 33, the stretching of the fourth joint arm 14 drives the fifth joint arm 15 to stretch out through the fourth traction rope 34, namely the five joint arm synchronous stretching mechanism realizes the synchronous stretching of the five joint arms through the traction of the second traction rope 32, the third traction rope 33 and the fourth traction rope 34, when the driving oil cylinder 2 contracts, the second joint arm 12 is driven to retract, the second joint arm 12 stretches out to drive the fifth joint arm 15 through the traction of the first traction rope 31 in a shrinking manner, the contraction of the fifth joint arm 15 is reversely acted on the fourth traction rope 34 to pull the fourth joint arm 14 to shrink, and the fourth joint arm 14 is contracted through the third traction rope 33, namely the five joint arm synchronous stretching mechanism is wound on the root of the first traction rope 31 and the fifth traction rope 33 to be used as the fifth traction rope, and the two ends of the fifth traction rope are simultaneously, and the number of the fifth traction rope is reduced, and the stretching mechanism is convenient to be installed at the two ends of the fifth traction rope and the fifth traction rope is reduced, and the two ends of the fifth traction rope stretching rope is required to be used as the stretching and the stretching rope 11.

As shown in fig. 2, in the embodiment of the present utility model, the root portion of the second knuckle arm 12 is provided with a first pulley 41 rotatably disposed, one end of the first traction rope 31 is connected to the head portion of the first knuckle arm 11, and the other end passes around the first pulley 41 and turns to traction the root portion of the fifth knuckle arm 15. When the second knuckle arm 12 is contracted relative to the first knuckle arm 11, the length of the traction section of the first traction rope 31 between the head of the first knuckle arm 11 and the first pulley 41 increases, the length of the traction section of the fifth knuckle arm 15 and the first pulley 41 decreases, thereby bringing the fifth knuckle arm 15 to retract together, and when the second knuckle arm 12 is extended relative to the first knuckle arm 11, the length of the traction section of the first traction rope 31 between the head of the first knuckle arm 11 and the first pulley 41 decreases, and the first traction rope 31 is unstressed.

As shown in fig. 2, in the embodiment of the present utility model, the root portion of the second arm 12 and the head portion of the first arm 11 are further provided with a second pulley 42 and a third pulley 43, respectively, and the first traction rope 31 is sequentially wound around the first pulley 41, the third pulley 43 and the second pulley 42 and connected to the root portion of the fifth arm 15. In the five-section arm synchronous telescoping mechanism, in order to ensure the linear telescoping of the section arm, the second section arm 12 stretches and contracts for one unit length, in theory, the fifth section arm 15 should stretch and contract for three units length relative to the second section arm 12, but in the five-section arm synchronous telescoping mechanism of the utility model, by arranging three pulleys, the first traction rope 31 forms four traction sections, the first traction section is positioned between the head of the first section arm 11 and the first pulley 41, the second traction section is positioned between the first pulley 41 and the third pulley 43, the third traction section is positioned between the third pulley 43 and the second pulley 42, and the fourth traction section is positioned between the second pulley 42 and the fifth section arm 15, when the second arm section contracts for dh length, the first, the second and the third traction sections can respectively increase the dh length, thereby shortening the fourth traction section by three times, and further realizing the correct linear telescoping action of the five-section arm synchronous telescoping mechanism.

As shown in fig. 2, in the embodiment of the present utility model, the telescopic end 22 is provided with a fourth pulley 44, and one end of the second traction rope 32 is connected to the root of the first arm 11, and the other end is wound around the fourth pulley 44 and connected to the root of the third arm 13. When the drive cylinder 2 is extended by one unit length, the traction section of the second traction rope 32 between the first knuckle arm 11 and the fourth pulley 44 increases by one unit length, and the traction section between the fourth pulley 44 and the third knuckle arm 13 decreases by one unit length, so that the third knuckle arm 13 protrudes by one unit length with respect to the second knuckle arm 12.

As shown in fig. 2, in the embodiment of the present utility model, the head of the third arm 13 is provided with a fifth pulley 45, one end of the third traction rope 33 is connected to the root of the second arm 12, and the other end is wound around the fifth pulley 45 and connected to the root of the fourth arm 14. When the third knuckle arm 13 extends one unit of length relative to the second knuckle arm 12, the traction section of the third traction rope 33 between the second knuckle arm 12 to the fifth pulley 45 increases one unit of length, and the traction section of the fourth knuckle arm 14 to the fifth pulley 45 decreases one unit of length, thereby extending the fourth knuckle arm 14 one unit relative to the third knuckle arm 13.

As shown in fig. 2, in the embodiment of the present utility model, the head of the fourth arm 14 is provided with a sixth pulley 46, one end of the fourth traction rope 34 is connected to the root of the second arm 12, and the other end is wound around the sixth pulley 46 and pulls the root of the fifth arm 15. When the fourth knuckle arm 14 is extended, the length of the traction section of the fourth traction rope 34 between the second knuckle arm 12 and the sixth pulley 46 increases, and the length of the traction section between the sixth pulley 46 and the fifth knuckle arm 15 decreases, thereby extending the fifth knuckle arm 15.

In the embodiment of the present utility model, the root portion of the fifth arm 15 is further provided with a seventh pulley 47, and one end of the fourth traction rope 34 is connected to the root portion of the second arm 12, and the other end is sequentially wound around the sixth pulley 46 and the seventh pulley 47 and connected to the head portion of the fourth arm 14. The second knuckle arm 12 extends over a length of one unit, and theoretically the length of the traction section of the fourth traction rope 34 between the second knuckle arm 12 and the sixth pulley 46 increases by two units, while the traction section between the sixth pulley 46 and the fifth knuckle arm 15 is changed to two sections by the sixth pulley 46 and the seventh pulley 47 for linear extension of the knuckle arm, and when the length of the traction section of the fourth traction rope 34 between the second knuckle arm 12 and the sixth pulley 46 increases by two units, the two sections between the sixth pulley 46 and the fifth knuckle arm 15 each decrease by one unit, so that the fifth knuckle arm 15 extends by only one unit with respect to the fourth knuckle arm 14.

In summary, the five-arm synchronous extension and contraction in the present utility model is achieved by the second traction rope 32, the third traction rope 33, the fourth traction rope 34, the fourth pulley 44, the fifth pulley 45, the sixth pulley 46, and the seventh pulley 47, so that the five-arm synchronous linear extension is achieved.

As shown in fig. 2, in the embodiment of the present utility model, when the driving cylinder 2 is contracted by one unit length, the second knuckle arm 12 is contracted by one unit length with respect to the first knuckle arm 11, and the fifth knuckle arm 15 is contracted by three units length with respect to the second knuckle arm 12 by the first traction rope 31, the first pulley 41, the second pulley 42, and the third pulley 43, and the fourth knuckle arm 14 is contracted by one unit length, and the contraction of the fifth knuckle arm 15 is contracted by two units length with respect to the second knuckle arm 12 by the fourth traction rope 34, the sixth pulley 46, and the seventh pulley 47, and the contraction of the fourth knuckle arm 14 is contracted by one unit length with respect to the third knuckle arm 13, and the contraction of the fourth knuckle arm 14 is contracted by one unit length with respect to the second knuckle arm 12 by the second traction rope 32 and the fifth pulley 45.

In summary, the five-arm synchronous extension and retraction of the present utility model is achieved by the first traction rope 31, the third traction rope 33, the fourth traction rope 34, the first pulley 41, the second pulley 42, the third pulley 43, the fifth pulley 45, the sixth pulley 46, and the seventh pulley 47, thereby achieving the synchronous linear extension and retraction of the five-arm.

In the embodiment of the utility model, the traction rope or the pulley is not limited to be arranged at the head or the root of the knuckle arm, but can be arranged at other positions, and the traction direction of the traction rope and the increasing and shortening proportion of each traction section are only required to be ensured to be correct.

In an embodiment of the utility model, the first traction rope 31, the second traction rope 32, the third traction rope 33 and the fourth traction rope 34 are traction wire ropes.

In order to achieve the above objective, the present utility model further provides a telescopic arm, where the telescopic arm includes the five-section synchronous telescopic mechanism according to the above, and since the telescopic arm adopts all the technical solutions of the above embodiments, the telescopic arm at least has the beneficial effects brought by the above embodiments, which are not described in detail herein. The telescopic boom can be applied to engineering machinery such as cranes, aerial work platforms and the like.

To achieve the above object, the present utility model also provides a crane, wherein the crane comprises a telescopic boom according to the above. The crane adopts all the technical schemes of the embodiments, so that the crane has at least the beneficial effects brought by the embodiments and is not described in detail herein.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

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 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The utility model provides a synchronous telescopic machanism of five-section arm, its characterized in that, synchronous telescopic machanism of five-section arm includes:

the arm joint assembly comprises a first arm (11), a second arm (12), a third arm (13), a fourth arm (14) and a fifth arm (15) which are sequentially sleeved;

the driving oil cylinder (2) comprises a fixed end (21) connected with the first section arm (11) and a telescopic end (22) connected with the second section arm (12);

a first traction rope (31) wound around the root of the second arm (12) and connected to the head of the first arm (11) and to the fifth arm (15) at both ends thereof;

a second traction rope (32) wound on the telescopic end (22) and connected with the root of the first knuckle arm (11) and the root of the third knuckle arm (13) at two ends respectively;

a third traction rope (33) wound around the head of the third arm (13) and connected to the root of the second arm (12) and the root of the fourth arm (14) at both ends thereof; and

and a fourth traction rope (34) which is wound around the head of the fourth knuckle arm (14) and the two ends of which are respectively used for traction of the root of the second knuckle arm (12) and the root of the fifth knuckle arm (15).

2. The five-joint arm synchronous telescopic mechanism according to claim 1, wherein a first pulley (41) which is rotatably arranged is arranged at the root of the second joint arm (12), one end of the first traction rope (31) is connected with the head of the first joint arm (11), and the other end bypasses the first pulley (41) and rotationally traction the root of the fifth joint arm (15).

3. The five-arm synchronous telescoping mechanism according to claim 2, wherein the root of the second arm (12) and the head of the first arm (11) are further provided with a second pulley (42) and a third pulley (43), respectively, and the first traction rope sequentially passes through the first pulley (41), the third pulley (43) and the second pulley (42) and is connected with the root of the fifth arm (15).

4. The five-joint arm synchronous telescopic mechanism according to claim 1, wherein a fourth pulley (44) is arranged on the telescopic end (22), one end of the second traction rope (32) is connected with the root of the first joint arm (11), and the other end of the second traction rope is wound around the fourth pulley (44) and is connected with the root of the third joint arm (13).

5. The five-knuckle arm synchronous telescoping mechanism according to claim 1, characterized in that a fifth pulley (45) is provided at the head of the third knuckle arm (13), one end of the third traction rope (33) is connected to the root of the second knuckle arm (12), and the other end is threaded around the fifth pulley (45) and connected to the root of the fourth knuckle arm (14).

6. The five-knuckle arm synchronous telescoping mechanism of claim 1, wherein the head of the fourth knuckle arm (14) is provided with a sixth pulley (46), one end of the fourth traction rope (34) is connected with the root of the second knuckle arm (12), and the other end is wound around the sixth pulley (46) and pulls the root of the fifth knuckle arm (15).

7. The five-knuckle arm synchronous telescoping mechanism of claim 6, wherein a seventh pulley (47) is further provided at the root of the fifth knuckle arm (15), one end of the fourth traction rope (34) is connected to the root of the second knuckle arm (12), and the other end is sequentially wound around the sixth pulley (46) and the seventh pulley (47) and connected to the head of the fourth knuckle arm (14).

8. The five-jointed arm synchronous telescoping mechanism of any one of claims 1 to 7, wherein said first traction rope (31), said second traction rope (32), said third traction rope (33), and said fourth traction rope (34) are traction wire ropes.

9. A telescopic arm comprising a five-jointed arm synchronous telescopic mechanism according to any one of claims 1 to 8.

10. Crane, characterized by comprising a telescopic boom according to claim 9.