CN217498512U

CN217498512U - Arm section, cargo boom and tower crane

Info

Publication number: CN217498512U
Application number: CN202220711184.2U
Authority: CN
Inventors: 苏晓伟; 骆世林; 王俊杰
Original assignee: Hunan Sany Tower Lifting Machinery Co Ltd
Current assignee: Hunan Sany Tower Lifting Machinery Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-09-27
Anticipated expiration: 2032-03-30

Abstract

The application relates to the field of engineering machinery, in particular to an arm section, a crane boom and a tower crane. The arm section comprises a first connecting head and at least one upper chord, the upper chord further comprises a body and a connecting part arranged at the first end of the body, the connecting end of the body and the connecting part form a step surface, one side of the connecting part facing the step surface forms a notch, one end of the first connecting head is arranged in the notch, the first connecting head is connected with the connecting part, and the first connecting head and the connecting part are usually connected in a welding mode. With the help of the gap formed on the connecting part, a reserved space for placing the first connecting head is formed on the upper chord member, the problem that the arm joint is too large in size due to overlapping placement of the connecting head and the upper chord member under the conventional condition, so that the overall truss is ultrahigh or ultra-wide and cannot be normally boxed is solved, the problem that the welding space between the connecting head and the chord member is narrow in the traditional process is solved, and the stability of the welding process is improved.

Description

Arm section, cargo boom and tower crane

Technical Field

The application relates to the field of engineering machinery, in particular to an arm section, a crane boom and a tower crane.

Background

With the stimulation of continuously increasing capital construction requirements and the aggravation of domestic market competition, the construction machinery in China gradually expands to large-tonnage and international markets, so that the demand of the construction machinery in the aspects of large bearing structure, transportation cost control and the like is expanded.

In the related art, in order to meet the design requirements of strength and cost, the boom of a large and ultra-large tower crane usually adopts an overall truss combination form of a square-section arm and a triangular-section arm. As a large bearing structure, the traditional universal type arm joint makes the external dimension of a crane arm larger, and is easy to be over-high relative to a transport case, and the case loading and the transport are difficult. The sandwich type joint structure can reduce the occupied space of the crane boom in transportation and save the transportation cost.

At present, although the defect that the traditional universal type structure is replaced by a sandwich type joint structure can overcome the defect that the packing size is ultrahigh, the joint structure is limited by the design size, so that the welding space in the joint structure is narrow, and the welding manufacturability is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides an arm section, jib loading boom and tower machine, has solved or improved among the prior art traditional arm section connection structure and has made the jib loading boom overall dimension great, the transport case vanning difficult technical problem. According to one aspect of the present application, there is provided an arm segment comprising: a first connector and at least one top chord; the upper chord comprises a body and a connecting part arranged at the first end of the body, a step surface is formed at the connecting end of the body and the connecting part, and a notch is formed at one side of the connecting part facing the step surface; one end of the first connecting head is arranged in the gap and is connected with the connecting part.

In one possible implementation, the first connection joint comprises two first connection plates; one end of each of the two first connecting plates is located in the notches on the two sides of the connecting portion respectively and is connected with one side, facing the step surface, of the connecting portion, and a first through hole is formed in the other end of each of the first connecting plates.

In one possible implementation, an end surface of the first connection plate facing the step surface abuts against the step surface.

In one possible implementation, the arm section further includes a reinforcing plate; one end of the reinforcing plate is connected with the first connecting plate, and the other end of the reinforcing plate is connected with the body.

In a possible implementation manner, at least one end of the reinforcing plate is provided with a groove.

In a possible implementation manner, the arm section further includes a second connector, and the second connector is connected to the second end of the body.

In a possible implementation manner, the second connector includes two second connection plates, and the second end of the body is clamped between the two second connection plates and connected to the two second connection plates.

In one possible implementation, the arm section further includes: and one end of the pin shaft support is connected with one side, far away from the body, of the second connecting plate.

According to a second aspect of the present application, there is also provided a jib boom comprising an arm segment according to any of the above.

According to a third aspect of the present application, the present application further provides a tower crane, comprising: the cargo boom is provided.

The application provides an arm festival, jib loading boom and tower machine, this kind of arm festival that this application provided can be applied to the connection between the arm festival chord member of parts such as tower machine jib loading boom and balance arm, like square cross-section arm festival, triangular cross-section arm festival etc. specifically include: at least one upper chord and a first connector. The upper chord further comprises a body and a connecting part arranged at the first end of the body, the body and the connecting end of the connecting part form a step surface, one side of the connecting part facing the step surface forms a notch, one end of the first connecting head is arranged in the notch, the first connecting head is connected with the connecting part, and the first connecting head and the connecting part are usually connected in a welding mode. With the help of the gap formed on the connecting part, a reserved space for placing the first connecting head is formed on the upper chord member, the problem that the arm joint is too large in size due to overlapping placement of the connecting head and the upper chord member under the conventional condition, so that the overall truss is ultrahigh or ultra-wide and cannot be normally boxed is solved, the problem that the welding space between the connecting head and the chord member is narrow in the traditional process is solved, and the stability of the welding process is improved.

Drawings

Fig. 1 is a schematic view illustrating an inter-arm-joint connection structure according to an embodiment of the present application.

Fig. 2 is an exploded view of an arm joint connection structure according to another embodiment of the present application.

Fig. 3 is a schematic structural diagram of a square-section arm segment according to another embodiment of the present application.

Fig. 4 is a schematic structural diagram of an arm section with a triangular cross section according to another embodiment of the present application.

Fig. 5 is an exploded view of a first connection joint of an arm segment according to an embodiment of the present disclosure.

Fig. 6 is a partial enlarged view of a portion a in fig. 2.

Description of reference numerals: 1. a first connector; 11. a first through hole; 12. a first connecting plate; 121. a first gasket; 2. a second connector; 21. a second through hole; 22. a second connecting plate; 221. a second gasket; 3. a pin shaft; 4. an upper chord; 41. a body; 42. a connecting portion; 6. a reinforcing plate; 7. a pin shaft support; 8. a pin; 9. and a cotter pin.

Detailed Description

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indicators in the embodiments of the present application (such as upper, lower, left, right, front, rear, top, bottom … …) are only used to explain the relative positional relationship between the components, the movement, etc. in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

Fig. 1 is a schematic structural diagram of an arm segment according to an embodiment of the present application. Fig. 2 is an exploded view of an arm segment according to another embodiment of the present application. As shown in fig. 1 and fig. 2, the arm section can be applied to the connection between the boom chords of the tower crane boom, the balance arm and other parts, and meanwhile, the arm section can be applied to a square-section arm section and also can be applied to a triangular-section arm section. This arm section includes specifically: an upper chord 4 and a first connector 1. The upper chord 4 further includes a body 41 and a connecting portion 42 disposed at the first end of the body 41, the connecting end of the body 41 and the connecting portion 42 forms a step surface, and one side of the connecting portion 42 facing the step surface forms a gap, the number of the gaps may be one or two, when the number of the gaps is two, the connecting end of the body 41 and the connecting portion 42 forms two step surfaces, the gap and the step surfaces are respectively located at two sides of the connecting portion 42, and the center line of the connecting portion 42 coincides with the center line of the body 41, or may not coincide with each other. One end of the first connector 1 is disposed in the notch, and the first connector 1 is connected to the connecting portion 42, typically by welding.

It should be noted that the arm section further includes two lower chords and a plurality of web members, the lower chords are connected with the upper chords 4 and the lower chords through the plurality of web members, when the arm is a square-section arm, the arm section includes two upper chords 41, and the two upper chords 41 are connected through the web members.

The application has the advantages that the gap formed on the connecting part 42 is used for forming the reserved space for placing the first connecting head 1 on the upper chord 4, the problem that the connecting part of the arm section is too large to cause the superelevation or superwidth of the whole truss to be normally boxed due to the overlapping placement of the first connecting head 1 and the upper chord 4 under the conventional condition is solved, in addition, the step surface and the gap further improve the connecting area of the first connecting head 1 and the upper chord 4, are beneficial to improving the connecting stability between the upper chord 4 and the first connecting head 1, improve the connecting stability between crane jib arms, and also relieve the problem that the welding space between the connecting head and the chord in the traditional process is narrow,

in a possible implementation manner, fig. 3 is a schematic structural diagram of a square-section arm section provided in another embodiment of the present application, and fig. 4 is a schematic structural diagram of a triangular-section arm section provided in another embodiment of the present application. As shown in fig. 3 and 4, the above-described arm segment can be applied to a square-section arm segment as shown in fig. 3, and also to a triangular-section arm segment as shown in fig. 4.

Specifically, as shown in fig. 2, the first connection joint 1 may include two first connection plates 12, one ends of the two first connection plates 12 are respectively located in the two side notches of the upper chord 4, are symmetrical with respect to the axial direction of the upper chord 4, and are connected to one side of the connection portion 42 facing the step surface, generally in a welding manner, and the other ends of the two first connection plates 12 are both provided with a first through hole 11, where the first through hole 11 is used for pin connection between the upper chords 4 of different arm sections.

In another possible implementation manner, the end surface of the first connecting plate 12 facing the step surface abuts against the step surface, so as to improve the connection stability between the first connecting plate 12 and the step surface, and further improve the connection strength between the first connecting head 1 and the upper chord 4.

Meanwhile, fig. 5 is a schematic diagram illustrating a partial explosion of an arm segment according to an embodiment of the present application. As shown in fig. 2 and 5, the body 41 and the connecting portion 42 of the upper chord 4 are respectively formed with two step surfaces and two notches corresponding to the two first connecting plates 12, so that one end of the connecting portion 42 away from the body 41 is in a "T" shape, thereby further improving the welding rigidity between the upper chord 4 and the first connecting head 1. Further, the depth of the notch in the cross-sectional direction of the connecting portion 42 corresponds to a desired interval between the two first connection plates 12. It is easy to understand that, when the jib assembly is designed and actually used, after the first connecting plates 12 connected are assembled through the pin shafts 3, it is necessary to consider that certain lateral clearances are required to be left on the side surfaces of the first connecting plates 12 to prevent interference between the connecting plates, so that the step surfaces and the notches can be designed according to the application scene requirements when being opened, namely, the required intervals between the first connecting plates 12, and the opening depths and other parameters of the step surfaces and the notches are designed, so that the lateral clearances between the first connecting plates 12 can be controlled more conveniently and more practically.

Optionally, as shown in fig. 2, the arm section may further include: two reinforcing plates 6, one end of each reinforcing plate 6 is welded to the body 41, and the other end is welded to the first connecting plate 12. Because the length of first connecting plate 12 and the welding seam length that realizes fixed connection between first connecting plate 12 and upper chord member 4 are positive correlation's relation, and when connection between them only receives the restraint of unilateral welding seam, although can realize fixed connection, intensity is limited, welds reinforcing plate 6 on deviating from one side of above-mentioned welding seam this moment, can play the effect of rational distribution welding seam stress, rigidity when effectively improving the arm section and connecting.

In one possible implementation, as shown in fig. 2, at least one end of the reinforcing plate 6 is provided with a groove, and further, a dovetail-shaped plate-shaped structure is preferable.

Further, as shown in fig. 2, each reinforcing plate 6 is further provided with a relief opening, and the depth of the relief opening corresponds to the height difference between the first connecting plate 12 and the notch. Let the setting of position mouth make when there is difference in height between first connecting plate 12 and breach, the reinforcing plate 6 laminates more when welding with first connecting plate 12 and upper chord 4, and connection stability is higher, makes connection structure's structure compacter simultaneously, effectively reduces the volume of arm festival junction, and then the vanning transportation of being convenient for.

In another possible implementation, as shown in fig. 2 and 3, the arm section further may further include a second connector 2, and the second connector 2 is connected to the second end of the body 41. The second connector 2 is used for being connected and matched with the first connectors 1 on other arm sections, so that the connection between the arm sections is realized.

Optionally, as shown in fig. 2, the second connector 2 includes two second connection plates 22, and the second end of the body 41 is clamped between the two second connection plates 22 and connected to the two second connection plates 22 by welding. When the second connector 2 is connected with the first connectors 1 on other arm sections, the two second connecting plates 22 are respectively located at the outer sides of the two first connecting plates 12, so that the inserting arrangement between the first connectors 1 and the second connectors 2 is formed. In addition, every second connecting plate 22 is last all to have seted up second through-hole 21, and first through-hole 11 is concentric state with second through-hole 21 when two connectors are pegged graft, utilizes the round pin axle 3 to wear to establish between first through-hole 11 and second through-hole 21 and realizes the fixed locking of first connector 1 of an arm section and the second connector 2 of another arm section to make the connection of two arm sections.

Optionally, as shown in fig. 2, the arm section may further include at least one pin shaft support 7, where the pin shaft support 7 is a U-shaped plate structure, and is fixedly connected to one side of the second connecting plate 22 away from the body, and an opening of the pin shaft support 7 faces the direction of the pin shaft 3, and an inner side surface of the pin shaft support is flush with an edge of the second through hole 21, and a process of the pin shaft 3 penetrating into the first through hole 11 and the second through hole 21 is more convenient and faster under the effect of the opening of the pin shaft support 7.

It will be appreciated that the pin holder 7 is relatively small in volume relative to the boom of the arm section and therefore does not substantially affect the volume of the joint of the arm section.

Specifically, as shown in fig. 2, the arm section may further include: a first spacer 121 connected to the inner side of the first connection plate 12 and a second spacer 221 connected to the outer side of the second connection plate 22. Through first gasket 121 and second gasket 221, reduce the wearing and tearing to first connecting plate 12 and second connecting plate 22 during round pin axle 3 wears to establish to the life of extension equipment.

In one possible implementation, fig. 6 is a partial enlarged view of a portion a of fig. 2. As shown in fig. 2 and 6, the arm section may further include: two pins 8 respectively arranged at two ends of the pin shaft 3 and a cotter pin 9 arranged on the pins 8. Through cotter 9 structure on pin 8 and the pin 8 for the round pin axle 3 wears to establish more stably in first through-hole 11 and second through-hole 21, and then makes the connection reliability of two arm sections higher.

The assembly and use process of the arm section in the application is as follows:

step surfaces are arranged on the body 41 of the upper chord 4 according to gaps among different connectors so as to form a gap and a connecting part 42, then the end surface of the first connecting plate 12 facing the step surfaces is in butt welding with the step surfaces, after the welding is completed, the reinforcing plates 6 are respectively welded to the outer sides of the first connecting plate 12, and the second connecting plate 22 is welded with the second chord 5. In addition, when two arm sections are connected, insert first connector 1 in inserting second connector 2 for first through-hole 11 and second through-hole 21 set up with one heart, wear to establish first through-hole 11 and second through-hole 21 with round pin axle 3 simultaneously, and utilize pin 8 and split pin 9 to carry out further fixed to round pin axle 3, so far, two arm sections are connected and are accomplished.

In the following, a boom according to the present application is described in connection with fig. 3 and 4, and as shown in fig. 3 and 4, a boom comprising a boom section as described in any of the embodiments above is provided. The cargo boom can be a cargo boom with a square cross section or a cargo boom with a triangular cross section, and specifically comprises boom sections, wherein the boom sections comprise: an upper chord 4 and a first connector 1. The upper chord 4 further comprises a body 41 and a connecting part 42 arranged at the first end of the body 41, the connecting end of the body 41 and the connecting part 42 forms a step surface, and one side of the connecting part 42 facing the step surface forms a notch, one end of the first connecting head 1 is arranged in the notch, and the first connecting head 1 and the connecting part 42 are connected, and the connection between the two is usually realized by welding. By means of the gap formed on the connecting part 42, a reserved space for placing the first connecting head 11 is formed on the upper chord 44, the problem that the arm joint is too large in size due to overlapping placement of the first connecting head 1 and the upper chord 4 under the conventional condition, so that the overall truss is ultrahigh or ultra-wide and cannot be normally boxed is solved, the problem that the welding space between the connecting head and the chord in the traditional process is narrow is solved, and the stability of the welding process is improved.

In addition, the application also provides a tower crane, and the tower crane comprises the cargo boom described in the embodiment. This kind of tower machine is owing to included above-mentioned jib loading boom for this tower machine includes: including the arm festival, the arm festival includes: an upper chord 4 and a first connection head 1. The upper chord 4 further comprises a body 41 and a connecting part 42 arranged at the first end of the body 41, the connecting end of the body 41 and the connecting part 42 forms a step surface, and one side of the connecting part 42 facing the step surface forms a notch, one end of the first connecting head 1 is arranged in the notch, and the first connecting head 1 and the connecting part 42 are connected, and the connection between the two is usually realized by welding. By means of the gap formed on the connecting part 42, a reserved space for placing the first connecting head 11 is formed on the upper chord 44, the problem that the arm joint is too large in size due to overlapping placement of the first connecting head 1 and the upper chord 4 under the conventional condition, so that the overall truss is ultrahigh or ultra-wide and cannot be normally boxed is solved, the problem that the welding space between the connecting head and the chord in the traditional process is narrow is solved, and the stability of the welding process is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An arm segment, comprising:

a first connection head (1) and at least one upper chord (4);

the upper chord (4) comprises a body (41) and a connecting part (42) arranged at the first end of the body (41), a step surface is formed at the connecting end of the body (41) and the connecting part (42), and a notch is formed at one side of the connecting part (42) facing the step surface;

one end of the first connecting head (1) is arranged in the gap and is connected with the connecting part (42).

2. Arm segment according to claim 1, characterized in that the first joint (1) comprises two first joint plates (12); one end of each of the two first connecting plates (12) is located in the notches on the two sides of the connecting portion respectively and is connected with one side, facing the step surface, of the connecting portion (42), and a first through hole (11) is formed in the other end of each of the first connecting plates (12).

3. An arm segment according to claim 2, characterised in that the end face of the first connecting plate (12) facing the step face abuts against the step face.

4. An arm segment according to claim 3, characterized in that it further comprises a reinforcement plate (6); one end of the reinforcing plate (6) is connected with the first connecting plate (12), and the other end of the reinforcing plate is connected with the body (41).

5. An arm segment according to claim 4, characterized in that the reinforcement plate (6) is grooved at least one end.

6. An arm segment according to claim 5, characterized in that the arm segment further comprises a second connector (2), the second connector (2) being connected with a second end of the body (41).

7. An arm segment according to claim 6, characterized in that the second connecting head (2) comprises two second connecting plates (22), the second end of the body (41) being interposed between the two second connecting plates (22) and being connected to the two second connecting plates (22).

8. The arm segment of claim 7, further comprising: and one end of the pin shaft support (7) is connected with one side, far away from the body (41), of the second connecting plate (22).

9. A crane boom comprising an arm segment according to any of claims 1-8.

10. A tower crane comprising a jib as claimed in claim 9.