CN201756423U

CN201756423U - Telescopic crane arm and crane

Info

Publication number: CN201756423U
Application number: CN2010202393290U
Authority: CN
Inventors: 张晓广
Original assignee: Sany Automobile Hoisting Machinery Co Ltd
Current assignee: Sany Automobile Hoisting Machinery Co Ltd
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2011-03-09
Anticipated expiration: 2020-06-28

Abstract

The utility model relates to a telescopic crane arm, which comprises at least two arm sections sleeved to each other. A first locking structure is arranged at the tail of the embedded arm section of each two adjacent arm sections, a second locking structure is arranged at the covering arm section of each two adjacent arm sections, and the first locking structures can be connected with the second locking structures in a locked manner. The telescopic crane arm is characterized in that each first locking structure comprises two arm pins (1) arranged on a same arm section surface (4), each second locking structure comprises at least one group of paired arm pin holes (2) arranged on a same arm section surface (4), and the two arm pins (1) of each first locking structure are meshed into the corresponding arm pin holes (2). Besides, the utility model further relates to a crane with the telescopic crane arm.

Description

Telescopic boom and hoisting crane

Technical field

The utility model relates to a kind of telescopic boom and a kind of hoisting crane with this telescopic boom.

Background technology

The single-cylinder bolt telescoping mechanism of hoister in large tonnage has obtained using widely, arranges and two kinds of forms of lateral arrangement directly over the distribution of its arm pin generally is divided into, and lateral arrangement is structurally relatively complicated, and cost is also higher relatively.Therefore, a kind of single-cylinder bolt stretching structure is disclosed among the European patent open file EP0661234B2, used single armed pin crane arm in this scheme, wherein, unique arm pin be arranged in the crane arm profile directly over, thereby obtained on a kind of structure arrangement form directly over the simple relatively single armed pin.Yet the single armed pin arranges that the bearing capacity that is allowed often is restricted, and obtains bigger load-carrying capacity in order to make crane arm, and single armed is sold to very big toward what will do.Yet crane arm in-to-in structure space is anxiety comparatively, and the excessive single armed pin of structure can not be set, so must compromise on the size of single armed pin, thereby has limited the load-carrying capacity of crane arm.

The utility model content

Therefore, the purpose of this utility model is to propose a kind of telescopic boom, has relatively large load-carrying capacity according to crane arm of the present utility model.

The purpose of this utility model realizes thus, promptly comprise: at least two arm joints that are set-located each other according to telescopic boom of the present utility model, the arm afterbody of the arm joint that embeds in wherein per two alternate arms joint is provided with first latch-up structure, and the arm joint of the overcoat of per two alternate arms joint is provided with second latch-up structure, and first latch-up structure can be connected with the locking of second latch-up structure, wherein, first latch-up structure comprises two arm pins, two arm pins are arranged on the same arm nodal section, second latch-up structure comprises the arm pin-and-hole of at least one composition to being provided with that is arranged in the arm nodal section, and wherein two arm pin rodents are incorporated in the arm pin-and-hole.At this, according to the both arms latch structure that telescopic boom of the present utility model has adopted same direction to arrange, this both arms latch structure can make crane arm obtain bigger bearing capacity by the arm pin that designs lessly relatively on two structures.

According to a preferred design plan of the present utility model, first latch-up structure also has retracing spring, under one end of retracing spring is resisted against on the bearing position of arm joint, and the other end is resisted against on the arm pin, and the spring force of retracing spring orders about the arm pin and automatically resets.This retracing spring can make the arm pin automatically return to its initial position simply, thereby avoided using complex structure, other measures that reset with high costs.

According to a preferred design plan of the present utility model, two arm pins connect by synchronous attaching parts.In addition, be connected with on the attaching parts synchronously and pull out arm pin bolt, this pulls out arm pin bolt and is connected with arm pin actuator.Arm pin actuator drives synchronous attaching parts when start, synchronous attaching parts then spurs the arm pin simultaneously and carries out telescopic moving.Like this, just can carry out synchro control to two arm pins simultaneously by a unique arm pin actuator, thereby effectively utilize the inner space of crane arm, reduce cost.

According to a design plan of the present utility model, at least one group of arm pin-and-hole is arranged in the arm nodal section of crane arm with predetermined spacing, when telescopic arm joint moved in the different positions, the arm pin rodent was incorporated in the different arm pin-and-holes, as required the arm joint was locked on the different positions.

In addition, another purpose of the present utility model realizes by a kind of hoisting crane with telescopic boom of the above-mentioned type.Can obtain bigger bearing capacity according to hoisting crane of the present utility model.

Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is in order to provide further instruction to claimed the utility model.

Description of drawings

Accompanying drawing constitutes the part of this specification sheets, is used to help further understand the utility model.These accompanying drawings illustrate embodiment of the present utility model, and are used for illustrating principle of the present utility model with specification sheets.Identical in the accompanying drawings parts are represented with identical label.Shown in the figure:

Fig. 1 is the scheme drawing according to an arm joint of telescopic boom of the present utility model;

Fig. 2 is the section drawing according to first lockout mechanism of telescopic boom of the present utility model.

The specific embodiment

Fig. 1 shows the scheme drawing according to an arm joint of telescopic boom of the present utility model.Constitute by the arm joint that more piece is set-located each other according to telescopic boom of the present utility model.At this one of them arm joint only is shown, and is described in greater detail.

As can be seen from Fig. 1, the arm afterbody 3 of this arm joint is provided with first lockout mechanism, it has two arm pins 1, these two arm pins are arranged on the same arm nodal section 4, and this arm nodal section 4 is provided with second lockout mechanism, this second lockout mechanism comprises two arm pin-and-holes 2 of paired setting, wherein the shape complementarity of these two arm pin-and-holes 2 and arm pin 1.In design plan of the present utility model, arm nodal section 4 is provided with the arm pin-and-hole 2 (in the drawings also not shown) of many groups with the predetermined spacing spaced apart paired.

In design plan of the present utility model, arm pin 1 can be inserted in the corresponding arm pin-and-hole 2 of another arm joint, and is locked in wherein, thereby adjacent two arm joints locking is linked together.

Fig. 2 shows the section drawing according to first lockout mechanism of telescopic boom of the present utility model.As seen from Figure 2, first lockout mechanism comprises two arm pins 1, and these two arm pins 1 are arranged in the arm afterbody 3 of arm joint, and wherein these two arm pins 1 are connected to each other by synchronous attaching parts 6, thereby realizes being synchronized with the movement.This external synchronous attaching parts 6 is provided with and pulls out arm pin bolt 7, and it is connected with unshowned arm pin actuator, thereby realizes the control of pulling out the action of arm pin to arm pin 1.In addition, as can also be seen from Figure, on each arm pin 1, also be arranged with retracing spring 5, lean against on the bearing position of arm joint an end of this retracing spring 5, and the other end is resisted against on the arm pin 1, thereby make arm pin 1 realize automatically reseting.

Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. telescopic boom, comprise: at least two arm joints that nest together each other, the arm afterbody (3) of the arm joint that embeds in wherein per two alternate arms joint is provided with first latch-up structure, and the arm joint of the overcoat of described per two alternate arms joint is provided with second latch-up structure, wherein, described first latch-up structure is connected with described second latch-up structure locking, it is characterized in that, described first latch-up structure comprises two arm pins (1), described two arm pins (1) are arranged on the same arm nodal section (4), described second latch-up structure comprises the arm pin-and-hole (2) of at least one composition to being provided with that is arranged in the same described arm nodal section (4), and wherein two described arm pins (1) are engaged in the described arm pin-and-hole (2).

2. telescopic boom according to claim 1, it is characterized in that, described first latch-up structure also has retracing spring (5), and on the bearing position that arm saved under an end of described retracing spring (5) was resisted against, and the other end is resisted against on the described arm pin (1).

3. telescopic boom according to claim 1 is characterized in that, two described arm pins (1) connect by synchronous attaching parts (6).

4. telescopic boom according to claim 3 is characterized in that, is connected with to pull out arm pin bolt (7) on described synchronous attaching parts (6), and the described arm pin bolt (7) that pulls out is connected with arm pin actuator.

5. according to each described telescopic boom in the claim 1 to 4, it is characterized in that at least one group of described arm pin-and-hole (2) is arranged in the arm nodal section (4) of described crane arm with predetermined spacing.

6. hoisting crane that has according to each described telescopic boom in the claim 1 to 5.