阅读说明：本技术 起重臂及起重机 (Crane boom and crane ) 是由 于继凯 游浩杰 喻露 于 2020-07-16 设计创作，主要内容包括：本发明提供了一种起重臂及起重机,涉及工程机械的技术领域,起重臂包括多节依次搭接的筒臂,相邻的两节筒臂的搭接处设置有第一滑块,第一滑块设置在其中一节筒臂的臂尾处的外壁上,且第一滑块设置在筒臂的侧向方向上；第一滑块与另一节筒臂的内壁抵接；起重臂包括：第二滑块；第二滑块设置在相邻的两节筒臂的搭接处且沿筒臂的侧向方向上；且位于第一滑块靠近搭接处边沿的一侧；相邻的两节筒臂通过第二滑块抵接。由上可知,第二滑块的作用为：在筒臂的侧向上用增加支点的方式缓解旁弯的问题,从而提高起重臂的使用寿命和安全性,进而提高起重机的使用寿命和安全性。(The invention provides a cargo boom and a crane, and relates to the technical field of engineering machinery, wherein the cargo boom comprises a plurality of sections of sequentially overlapped cylinder arms, a first sliding block is arranged at the overlapping part of two adjacent sections of cylinder arms, the first sliding block is arranged on the outer wall at the arm tail part of one section of cylinder arm, and the first sliding block is arranged in the lateral direction of the cylinder arm; the first sliding block is abutted against the inner wall of the other section of the cylinder arm; the jib loading boom includes: a second slider; the second sliding block is arranged at the lap joint of two adjacent sections of the cylinder arms and along the lateral direction of the cylinder arms; and is positioned at one side of the first slide block close to the edge of the lap joint; two adjacent sections of section of thick bamboo arms pass through the second slider butt. From the above, the second slider functions as: the problem of side bending is alleviated in a mode of increasing a fulcrum in the lateral direction of the cylinder arm, so that the service life and the safety of a crane arm are improved, and the service life and the safety of the crane are further improved.)

1. A cargo boom comprises a plurality of sections of sequentially overlapped cylinder arms (1), wherein a first sliding block (2) is arranged at the overlapping position of two adjacent sections of cylinder arms (1), the first sliding block (2) is arranged on the outer wall of the arm tail (3) of one section of cylinder arm (1), and the first sliding block (2) is arranged in the lateral direction of the cylinder arm (1); the first sliding block (2) is abutted against the inner wall of the other section of the cylinder arm (1); characterized in that, the jib loading boom includes: a second slider (4);

the second sliding block (4) is arranged at the lap joint of two adjacent sections of the cylinder arms (1) and along the lateral direction of the cylinder arms (1); and is positioned at one side of the first sliding block (2) close to the edge of the lap joint; two adjacent sections of cylinder arms (1) are abutted through the second sliding block (4).

2. A boom according to claim 1, characterised in that the second slider (4) is arranged on the outer wall at the tail (3) of one of the telescopic arms (1).

3. A boom according to claim 2, characterized in that there are two second sliders (4);

the section of the cylinder arm (1) perpendicular to the extending direction of the cylinder arm is U-shaped, and the two second sliding blocks (4) are symmetrically arranged on the outer walls of two sides of the U respectively.

4. The crane boom according to claim 2 or 3, characterized in that the length of the side of the second sliding block (4) close to the edge of the lap joint from the end surface of the boom tail (3) is less than or equal to the lap joint length of the two sections of the cylinder arms (1).

5. A boom according to claim 4, characterized in that the second slider (4) is connected to or integrated with the first slider (2).

6. A boom according to claim 1, characterised in that the second slider (4) is arranged on the inner wall at the head (5) of one of the telescopic arms (1).

7. The jib according to claim 6, wherein there are two second slides (4);

the section of the cylinder arm (1) perpendicular to the extending direction of the cylinder arm is U-shaped, and the two second sliding blocks (4) are symmetrically arranged on the inner walls of two sides of the U respectively.

8. The jib according to claim 6 or 7, wherein the length of the side of the second slide (4) close to the edge of the overlap joint from the end face of the jib head (5) is 100 mm and 200 mm.

9. A boom according to claim 1, characterized in that the second slider (4) is of the same construction and dimensions as the first slider (2).

10. A crane, characterized in that the crane comprises a jib according to any of claims 1-9.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a crane boom and a crane.

Background

The crane arm is an important part on the crane. At present, a crane boom with a U-shaped cross section is common on medium and small tonnage automobile cranes. Two sections of adjacent sections of tubular arms of jib loading boom overlap in proper order and establish, and the jib loading boom is along with two sections of tubular arms overlap and establish the increase or reduce of length, realizes shortening or extension of jib loading boom.

In the prior art, the problem that the crane boom is easy to bend due to the long-term action of lateral force in the using process of the crane boom is solved; the problem of side bending is particularly serious in the medium-long cylinder arm and the full-extension cylinder arm.

Therefore, how to relieve the side bending situation of the crane boom needs to be solved.

Disclosure of Invention

The invention aims to provide a crane boom and a crane, which are used for solving the technical problem that the crane boom is easy to bend in the using process in the prior art.

The invention provides a cargo boom which comprises a plurality of sections of sequentially overlapped cylinder arms, wherein a first sliding block is arranged at the overlapping part of two adjacent sections of cylinder arms, the first sliding block is arranged on the outer wall at the tail part of one section of cylinder arm, and the first sliding block is arranged in the lateral direction of the cylinder arm; the first sliding block is abutted against the inner wall of the other section of the cylinder arm; the cargo boom includes: a second slider; the second sliding block is arranged at the lap joint of two adjacent sections of the cylinder arms and along the lateral direction of the cylinder arms; and is positioned at one side of the first slide block close to the edge of the lap joint; two adjacent sections of section of thick bamboo arms pass through the second slider butt.

Further, the second sliding block is arranged on the outer wall of the arm tail of one of the cylinder arms.

Furthermore, the number of the second sliding blocks is two; the section of the cylinder arm perpendicular to the extending direction of the cylinder arm is U-shaped, and the two second sliding blocks are symmetrically arranged on the outer walls of two sides of the U respectively.

Furthermore, the length of one side of the second sliding block close to the edge of the lap joint part, which is far away from the end face of the arm tail, is less than or equal to the lap joint length of the two sections of the cylinder arms.

Further, the second sliding block is connected with the first sliding block or integrally formed.

Further, the second sliding block is arranged on the inner wall of the arm head of one of the cylinder arms.

Furthermore, the number of the second sliding blocks is two; the section of the cylinder arm perpendicular to the extending direction of the cylinder arm is U-shaped, and the two second sliding blocks are symmetrically arranged on the inner walls of two sides of the U respectively.

Further, the length of one side of the second sliding block close to the edge of the lap joint part from the end surface of the arm head is 100-200 mm.

Further, the second sliding block and the first sliding block are the same in structure and size.

Furthermore, the invention also provides a crane, which comprises the crane arm.

According to the crane boom provided by the invention, the second sliding block is arranged at the lap joint of two adjacent sections of cylinder arms, and the second sliding block is arranged in the lateral direction of the cylinder arms; two adjacent sections of section of thick bamboo arms pass through the second slider butt. In the use, first slider and second slider all with adjacent two sections horn butts, the two effect that plays the fulcrum jointly to effectual resistance yawing force. And the second slider sets up the setting of one side that is close to the overlap joint border at first slider, can improve the support effect.

In addition, due to the fact that the second sliding block is added, namely damping is increased, the natural frequency of vibration of the cylinder arm can be changed through the arrangement of the second sliding block, and the time length of the cylinder which makes sound due to the vibration is shortened.

From the above, the second slider functions as: the lateral direction of the cylinder arm is increased by a mode of increasing the pivot to relieve the problem of side bending, so that the service life and the safety of the crane boom are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a partial schematic structural view of a crane boom provided in accordance with an embodiment of the invention;

FIG. 2 is a schematic view of a portion of a crane boom provided in accordance with another embodiment of the present invention;

FIG. 3 is a cross-sectional view of a boom provided by an embodiment of the present invention;

fig. 4 is a cross-sectional view of a boom provided in accordance with another embodiment of the present invention.

Icon: 1-a cylinder arm; 2-a first slide; 3-arm tail; 4-a second slide block; 5-arm head.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

FIG. 1 is a partial schematic structural view of a crane boom provided in accordance with an embodiment of the invention; FIG. 2 is a schematic view of a portion of a crane boom provided in accordance with another embodiment of the present invention; as shown in fig. 1 and fig. 2, the boom provided by the embodiment of the invention includes a plurality of sections of sequentially overlapped cylinder arms 1, a first slider 2 is arranged at the overlapping position of two adjacent sections of cylinder arms 1, the first slider 2 is arranged on the outer wall at the arm tail 3 of one section of cylinder arm 1, and the first slider 2 is arranged in the lateral direction of the cylinder arm 1; the first sliding block 2 is abutted against the inner wall of the other section of the cylinder arm 1; the jib loading boom includes: a second slider 4; the second sliding block 4 is arranged at the lap joint of two adjacent sections of the cylinder arms 1 and along the lateral direction of the cylinder arms 1; and is positioned at one side of the first slide block 2 close to the edge of the lap joint; two adjacent sections of cylinder arms 1 are abutted by the second sliding block 4.

Wherein, the lateral direction means: in use, the direction of the lateral force to which the cylinder arm 1 is subjected. For example; when the cylinder arm 1 is U-shaped in cross section perpendicular to its direction of extension, the lateral direction is a side wall of the U-shape.

Specifically, the second slider 4 and the first slider 2 may be provided at the same height or different heights on the cylinder arm 1.

The second slider 4 is made of polymer material such as mc nylon (polyamide), pe (polyethylene) and the like.

The second sliding block 4 is made of wear-resistant material.

In the boom provided by the embodiment of the invention, the second slider 4 is arranged at the lap joint of two adjacent sections of the cylinder arms 1, and the second slider 4 is arranged in the lateral direction of the cylinder arms 1; two adjacent sections of cylinder arms 1 are abutted by the second slide block 4. In the use, first slider 2 and second slider 4 all with two adjacent sections shell arms 1 butt, the effect of fulcrum is played jointly to the two to effectual resistance lateral force prevents that the jib loading boom from taking place the skew. And second slider 4 sets up the setting of one side at first slider 2 near the overlap joint border, can improve the supporting effect.

In addition, due to the addition of the second slider 4, which is equivalent to the increase of the damping, the arrangement of the second slider 4 can change the natural frequency of the vibration of the cylinder arm 1, and shorten the period of time during which the cylinder arm 1 makes a sound due to the vibration.

As can be seen from the above, the second slider 4 functions as: the lateral direction of the cylinder arm 1 is increased by a mode of increasing the pivot to relieve the problem of side bending, so that the service life and the safety of the crane boom are improved.

FIG. 3 is a cross-sectional view of a boom provided by an embodiment of the present invention; as shown in fig. 1 and 3, in addition to the above-described embodiment, a second slider 4 is further provided on the outer wall of one of the telescopic arms 1 at the arm tail 3.

Wherein, the second slider 4 can be fixedly connected with the cylinder arm 1 in a welding or detachable way. When the second slider 4 is detachably and fixedly connected with the cylinder arm 1, the second slider 4 can be in bolt connection or snap connection with the cylinder arm 1, and the like.

The thickness of the second sliding block 4 is determined by the fact that when two adjacent sections of the cylinder arms 1 are overlapped, the second sliding block 4 can be abutted against the inner wall of the other section of the cylinder arm 1.

Further, two second sliding blocks 4 are provided; the section of the cylinder arm 1 perpendicular to the extending direction is U-shaped, and the two second sliding blocks 4 are respectively and symmetrically arranged on the outer walls of two sides of the U-shape.

Wherein, the second slider 4 of two symmetries is a set of, but on the outer wall of horn 1 interval be provided with multiunit second slider 4 to increase the quantity of fulcrum, thereby improve the supporting effect, better alleviate the lateral curvature problem.

Furthermore, the length of one side of the second sliding block 4 close to the edge of the lap joint part from the end surface of the arm tail 3 is less than or equal to the lap joint length of the two sections of the cylinder arms 1.

The overlapping amount of two adjacent sections of the cylinder arms 1 is L, and the length of the first sliding block 2 from the end face of the arm tail 3 is L/2.

In this embodiment, in the use, the second slider 4 sets up in two sections adjacent stack arms 1 on the less section of thick bamboo arm 1's of external diameter arm tail 3 outer walls, can avoid like this in the assembling process, the arm head 5 of the great section of thick bamboo arm 1 of external diameter and the less section of thick bamboo arm 1's of external diameter arm tail 3 department structures of external diameter produce the interference, lead to the unable problem of establishing the assembly of cover.

On the basis of the above embodiment, further, the second slider 4 is connected to or integrally formed with the first slider 2.

In this embodiment, the setting range of the fulcrum can be enlarged by the arrangement, so that the supporting effect is improved, and the problem of lateral bending is better solved.

FIG. 4 is a cross-sectional view of a lift arm provided in accordance with another embodiment of the present invention; as shown in fig. 2 and 4, in addition to the above-described embodiment, further, the second slider 4 is provided on the inner wall at the arm head 5 of one of the articulated arm 1.

The thickness of the second sliding block 4 should be based on that when two adjacent sections of the cylinder arms 1 are overlapped, the second sliding block 4 can be abutted against the inner wall of the other section of the cylinder arm 1.

Further, two second sliding blocks 4 are provided; the section of the cylinder arm 1 perpendicular to the extending direction is U-shaped, and the two second sliding blocks 4 are respectively and symmetrically arranged on the inner walls of two sides of the U-shape.

Wherein, the second slider 4 of two symmetries is a set of, but on the inner wall of horn 1 interval be provided with multiunit second slider 4 to increase the quantity of fulcrum, thereby improve the supporting effect, better alleviate the lateral curvature problem.

Further, the length of one side of the second slider 4 close to the edge of the lap joint from the end face of the arm head 5 is 100-200 mm.

Wherein, when the second slider 4 sets up in arm head 5 department, should ensure that in the assembling process, the unable interference that produces of arm head 5 of the great bobbin arm 1 of external diameter and the arm tail 3 department structure of the less bobbin arm 1 of external diameter can realize the cover and establish the assembly.

In this embodiment, the second slider 4 is disposed on the inner wall of the arm head 5 of the cylinder arm 1 having a larger outer diameter in the two adjacent cylinder arms 1. In the use, first slider 2 and second slider 4 all with adjacent two sections shell arms 1 butt, the two effect that play the fulcrum jointly to effectual resistance lateral force. And second slider 4 sets up the setting of one side at first slider 2 near the overlap joint border, can improve the supporting effect.

As shown in fig. 1 to 4, on the basis of the above-mentioned embodiments, further, the second slider 4 has the same structure and size as the first slider 2.

In this embodiment, the second slider 4 and the first slider 2 have the same structure and size, and are easier to take materials in the manufacturing and assembling processes.

On the basis of the above embodiment, further, the embodiment of the invention further provides a crane, and the crane includes the above boom.

In the embodiment, the second sliding block 4 is arranged at the lap joint of two adjacent sections of the cylinder arms 1, and the second sliding block 4 is arranged in the lateral direction of the cylinder arms 1; two adjacent sections of cylinder arms 1 are abutted by the second slide block 4. In the use, first slider 2 and second slider 4 all with two adjacent sections shell arms 1 butt, the effect of fulcrum is played jointly to the two to effectual resistance lateral force prevents that the jib loading boom from taking place the skew. And second slider 4 sets up the setting of one side at first slider 2 near the overlap joint border, can improve the supporting effect.

In addition, due to the addition of the second slider 4, which is equivalent to the increase of the damping, the arrangement of the second slider 4 can change the natural frequency of the vibration of the cylinder arm 1, and shorten the period of time during which the cylinder arm 1 makes a sound due to the vibration.

As can be seen from the above, the second slider 4 functions as: the problem of side bending is relieved in a mode of increasing the pivot in the lateral direction of the cylinder arm 1, so that the service life and the safety of a crane boom are prolonged, and the service life and the safety of the crane are further prolonged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.