WO2011066752A1

WO2011066752A1 - Main boom telescoping mechanism and vehicle crane with said main boom telescoping mechanism

Info

Publication number: WO2011066752A1
Application number: PCT/CN2010/074709
Authority: WO
Inventors: 陈林; 周斌; 张强; 邓文旭
Original assignee: 湖南三一智能控制设备有限公司; 三一汽车制造有限公司
Priority date: 2009-12-04
Filing date: 2010-06-29
Publication date: 2011-06-09
Also published as: CN201694761U

Abstract

A main boom telescoping mechanism and a vehicle crane with said main boom telescoping mechanism are disclosed. The main boom telescoping mechanism comprises a basic boom, four section booms, one telescoping oil cylinder (12) whose cylinder barrel is fixed on the tail part of a third section boom (9), and a mechanical lock (5). A cylinder pin (14) is arranged on the cylinder rod of the telescoping oil cylinder (12), a first cylinder pin hole (15) is arranged on the tail part of the basic boom (4), and a second cylinder pin hole (16) is arranged on the tail part of a second section boom (3). When the cylinder pin (14) is engaged with the first cylinder pin hole (15) and the mechanical lock（5）is closed, the second section boom (3) is retracted. When the cylinder pin (14) is engaged with the second cylinder pin hole (16) and the mechanical lock（5）is opened, the third section boom (9) is extended A fourth section boom (7) and a fifth section boom (1) are extended/retracted by the laying ropes driven by the third section boom (9). The main boom telescoping mechanism improves the layout of the oil cylinder and the wire ropes and reduces the weight of the mechanism and the cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main boom telescopic mechanism and a truck crane having the main arm telescopic mechanism. BACKGROUND OF THE INVENTION The main arm of a crane is the core component of the crane, and is the most important load-bearing structural component of the crane crane; the weight, strength and rigidity of the main arm directly affect the performance of the crane. In addition, the technical content of the main arm structure is an important indicator of the level of automobile crane products. Improving the design, manufacture and assembly quality of the main arm mechanism is the goal that all crane manufacturers are constantly pursuing. The telescopic mechanism is a key component of the main arm, which restricts the expansion and hoisting capacity of the main boom. In the prior art, the main arm telescopic mechanism mainly has two types of oil rainbow rope row and single rainbow bolt. At present, the domestic and foreign small and medium-sized truck cranes mainly use the oil rainbow rope _ 伸缩 type telescopic mechanism, and the expansion mode mainly includes sequential plus synchronous mode and synchronous mode. For the five-section sequential plus synchronous telescopic mechanism, it is mainly composed of two inverted telescopic cylinders and two sets of telescopic boom ropes. This traditional technology has matured. However, for the 50T and above products on the market, the quality of the two-retracting cylinders exceeds one ton, and the whole set of booms is large and heavy. Therefore, if a new five-arm crane telescopic mechanism using a telescopic cylinder, rationally optimizing the force between the arms and reducing the amount of steel rope can be developed, the weight of the entire arm can be reduced, and the lifting performance of the whole vehicle can be improved. It will be very important to reduce production costs. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned deficiencies of the prior art of the company. An object of the present invention is to provide a main arm telescopic mechanism and a truck crane having the main arm telescopic mechanism, which is required to use a telescopic oil rainbow, an optimized layout, and a steel wire amount to reduce the weight of the entire mechanism. Improve vehicle lifting performance and reduce production costs. To achieve the above object, the present invention provides a main arm telescopic mechanism comprising: a basic arm, a second pitch arm, a third pitch arm, a fourth pitch arm, a fifth pitch arm, and a telescopic oil red, in particular, The main arm telescopic mechanism further includes a mechanical lock disposed between the second pitch arm and the third pitch arm, wherein the cylinder of the telescopic oil rainbow is fixed at the tail of the third section arm, and the cylinder rod of the telescopic cylinder is provided with a rainbow pin And the tail of the basic arm is provided with a first cylinder pin hole, the tail of the second arm is provided with a second cylinder pin hole, the cylinder pin is engaged with the first cylinder pin hole and the mechanical lock is closed to realize the expansion and contraction of the second pitch arm; The rainbow pin is engaged with the pin hole of the second cylinder and the machine The mechanical lock is opened to realize the expansion and contraction of the third section arm, and the fourth section arm and the fifth section arm are expanded and contracted by the third section arm-driven cord. Further, according to the main arm telescopic mechanism of the present invention, the cord includes: a first steel cord, one end fixed to the tail of the second pitch arm, the first pulley disposed around the head of the cylinder of the telescopic cylinder, and the other One end is fixed to the tail of the fourth section arm to realize the synchronous extension of the fourth section arm and the third section arm; the second steel rope is fixed at one end to the tail of the third section arm, and sequentially passes around the second section arm a third pulley of the head and a second pulley disposed at the tail of the third section arm, and the other end is fixed to the fifth section arm to achieve synchronous retraction of the fifth section arm and the third section arm; and the third steel a cord, one end fixed to the head of the fourth section arm, the fourth pulley disposed at the end of the fifth section arm and the fifth pulley disposed at the head of the fourth section arm, and the other end fixed to the second section arm The tail portion is used to realize the synchronous extension of the fifth section arm and the third section arm and the synchronous retraction of the fourth section arm and the third section arm. Through such a design, the steel wire arrangement can be optimized, so that the amount of steel wire is greatly reduced, thereby reducing the gap between the arms, reducing the arm section loss, and improving the lifting performance of the boom. Further, according to the main arm telescopic mechanism of the present invention, the cylinder pin is disposed at the end of the red rod of the telescopic cylinder. Through such a design, the arrangement of the hydraulic oil pipes for the oil distribution of the telescopic oil red and the red oil can be made more convenient, and the equipment maintenance is also facilitated. Further, according to the main arm telescopic mechanism of the present invention, the arm pin and the arm pin cylinder are disposed at the head of the basic arm. Through such a design, equipment maintenance is facilitated. Further, according to the main arm telescopic mechanism of the present invention, the mechanical lock is an automatic mechanical lock. Through such a design, the second arm and the third arm are automatically locked without the arrangement of the oil cylinder and the oil supply pipe, thereby improving work efficiency. Further, the present invention provides a truck crane, and in particular, the crane includes a main arm telescopic mechanism having the above features. The present invention has the following technical effects: First, the main arm telescopic mechanism of the present invention eliminates the need for a telescopic cylinder, which reduces the weight of the boom by at least 1 屯, thereby reducing the weight of the vehicle; and because of the boom The self-weight of the descending of the family, which not only reduces the production cost but also improves the stability of the whole vehicle when the middle and long arm are suspended. Secondly, the main arm telescopic mechanism optimizes the steel wire arrangement and greatly reduces the amount of steel wire. In addition, the reduction in the assembly of the boom is reduced due to the reduced number of telescopic oil rainbows and steel cords in the arm. The above general description and the following detailed description are intended to be illustrative of the invention BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. DETAILED DESCRIPTION ^ ¹ embodiment described in detail in conjunction with the accompanying drawings embodiments of the present invention. It should be noted that only the features of the present invention which are different from the prior art will be described below, and the technical features that can be found in the prior art will not be described here. Referring to Figure 1, there is shown a schematic view of the structure of a main arm telescopic mechanism in accordance with a preferred embodiment of the present invention. As can be seen from the figure, the main arm telescopic mechanism of the present invention mainly comprises: a basic arm 4, a second arm 3, a third arm 9, a fourth arm 7, a fifth arm 1, a telescopic cylinder 12, a A steel rope (also called "stretching four steel rope,") 8, the second steel rope (also known as "shrinking five steel rope,") 10, the third steel rope (also known as "stretching five Four steel ropes, 2) and a mechanical lock 5, wherein the telescopic oil rainbow 12 is used to control the telescopic movement of the basic arm 4, the second pitch arm 3 and the third pitch arm 9, and the above three steel wires are used to control the fourth section Simultaneous expansion and contraction of the arm 7 and the fifth arm 1. The connection relationship of each component will be described in detail below. The rainbow of the telescopic oil rainbow 12 is fixed at the tail of the third arm 9 and the rainbow pin 14 is arranged on the cylinder rod. And the tail portion of the basic arm 4 is provided with a first rainbow pin hole 15 , and the tail portion of the second segment arm 3 is provided with a second rainbow pin hole 16 , and the rainbow pin 14 is respectively realized with the first rainbow pin hole 15 and the second rainbow pin hole In addition, the head of the base arm 4 is designed with an arm pin 13 for inserting and unloading the second arm 3 through the arm pin cylinder 11. The lock 5 is assembled between the third arm 9 and the second arm 3 for locking the two and three arms. In the embodiment, the mechanical lock 5 is an automatic mechanical lock, and the red pin 14 on the telescopic oil rainbow 12 The mechanical lock 5 is automatically opened when the second red pin hole 16 at the end of the second arm 3 is inserted. Reference numeral 6 in the drawing is a hose turntable for supplying oil for the telescopic oil red 12 and the red pin oil red 14. As follows: The first steel cord 8 is fixed to the tail of the second pitch arm 3, bypasses the first pulley 17 disposed at the head of the rainbow cylinder of the telescopic oil rainbow 12, and the other end is fixed to the The fourth section of the arm 7 is configured to realize the simultaneous extension of the fourth section arm 7 and the third section arm 9; the second steel cord 10 end is fixed to the tail of the third section arm 9, Bypassing the setting in the second a third pulley 19 of the head of the arm 3 and a second pulley 18 disposed at the tail of the third arm 9 and the other end fixed to the tail (or head) of the fifth arm 1 to realize The fifth section arm 1 is synchronously retracted with the third section arm 9; and the third steel cord 2 end is fixed to the head of the fourth section arm 7, and is sequentially bypassed to be disposed in the fifth section. a fourth pulley 21 at the rear of the arm 1 and a fifth pulley 20 disposed at the head of the fourth pitch arm 7 and the other end fixed at the tail of the second pitch arm 3 to realize the fifth pitch arm 1 Synchronous extension with the third pitch arm 9 and simultaneous retraction of the fourth pitch arm 7 and the third pitch arm 9. For ease of understanding, the working principle of the extension of the main arm telescopic mechanism according to the present invention will be described below. First, the main arm telescopic mechanism is fully retracted, that is, the cylinder pin 14 of the telescopic cylinder 12 and the first of the basic arm 4 The pin hole 15 is locked, the arm pin 11 is opened, and the mechanical lock 5 locks the second and third arm. When the rodless cavity of the telescopic cylinder 12 is oiled, the telescopic oil rainbow 12 extends, and when extended, the second, third, fourth, and fifth section arms are integrally extended. After extending into position, the arm pin 13 on the head of the base arm 4 locks the second arm 3 via the arm pin cylinder 11. Then, the rainbow pin 14 locked with the tail of the basic arm 4 is opened, the rod cavity of the telescopic oil rainbow 12 is oiled, the rainbow rod is recovered to the tail of the second section arm 3, and the telescopic cylinder 12 is retracted into position after the rainbow pin 14 and the first The rear second cylinder pin hole 16 of the two-section arm 3 is engaged and locked, and the automatic machine *3⁄4 lock 5 is opened while being locked. When the telescopic oil rainbow 12 is extended again, the third arm 9 is extended, and at the same time, the fourth and fifth arm and the third arm 9 are extended by the first steel wire 8 and the third steel wire 2 Thereby completing the extension of the main arm telescopic mechanism. The working principle of the main arm telescopic mechanism retracting is as follows: First, the telescopic oil red 12 is retracted, and the third, fourth, and fifth quarter arms are retracted synchronously. After retracting into position, the rainbow pin 14 is withdrawn from the second rainbow pin hole 16 at the end of the second section arm 3, while the mechanical lock 5 automatically locks the second and third section arms. Next, the telescopic cylinder 12 is extended and, after being extended into position, the cylinder pin 14 is engaged and locked with the first cylinder pin hole 15 at the tail of the basic arm 4. Then, the arm pin 13 on the head of the base arm 4 is opened. Finally, the telescopic cylinder 12 is retracted, and the retracting action of the main arm telescopic mechanism is completed. It should be noted that the rainbow pin 14 is disposed at the end of the rainbow of the telescopic oil rainbow 12, and the purpose thereof is to make the arrangement of the hydraulic oil pipe for supplying oil to the telescopic oil rainbow 12 more convenient, and also facilitate equipment maintenance. The arm pin 13 and the arm pin cylinder 11 are disposed outside the main arm telescopic mechanism, and are specifically disposed at the head of the basic arm 4, which also facilitates the arrangement of the hydraulic oil pipe and the maintenance of the equipment. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

A main arm telescopic mechanism includes: a base arm (4), a second arm (3), a third arm (9), a fourth arm (7), a fifth arm (1), and a telescopic cylinder (12), characterized in that the main arm telescopic mechanism further comprises a mechanical lock (5) disposed between the second section arm (3) and the third section arm (9), wherein a cylinder of the telescopic cylinder (12) is fixed to a tail portion of the third section arm (9), and a rainbow pin (14) is disposed on the rainbow rod of the telescopic oil rainbow (12), and the basic arm ( 4) a tail portion is provided with a first cylinder pin hole (15), and a tail portion of the second pitch arm (3) is provided with a second cylinder pin hole (16).

The cylinder pin (14) is engaged with the first cylinder pin hole (15) and the mechanical lock (5) is closed to realize the expansion and contraction of the second pitch arm (3); the rainbow pin (14) and the The second cylinder pin hole (16) is engaged and the mechanical lock (5) is opened to effect expansion and contraction of the third pitch arm (9), and

The fourth section arm (7) and the fifth section arm (1) are telescoped by the row of ropes driven by the third section arm (9). The main arm telescopic mechanism according to claim 1, wherein the arranging rope comprises: a first steel cord (8), the end is fixed to a tail portion of the second pitch arm (3), and is disposed around a first pulley (17) of the cylinder head of the telescopic cylinder (12) and a other end fixed to a tail of the fourth section arm (7) to realize the fourth section arm (7) Synchronous extension of the third arm (9);

a second steel cord (10), the end being fixed to the tail of the third pitch arm (9), sequentially bypassing a third pulley (19) disposed at the head of the second pitch arm (3), and disposed at a second pulley (18) at the tail of the third section arm (9) and the other end fixed to the fifth section arm (1) to implement the fifth section arm (1) and the third Synchronous retraction of the arm (9);

a third steel cord (2), the end is fixed to the head of the fourth section arm (7), sequentially bypassing the fourth pulley (21) disposed at the tail of the fifth section arm (1), and disposed at a fifth pulley (20) of the fourth section arm (7) and a other end fixed to the tail of the second section arm (3) to implement the fifth section arm (1) and the The third section of the arm (9) is synchronously extended and the fourth section arm (7) is retracted synchronously with the third section arm (9).

The main arm telescopic mechanism according to claim 1, wherein the rainbow pin (14) is provided at a cylinder end portion of the telescopic cylinder (12).

4. The main boom telescopic mechanism according to claim 1, further comprising an arm pin (13) and an arm pin cylinder for locking the base arm (4) and the second pitch arm (3) (11).

The main arm telescopic mechanism according to claim 4, characterized in that the arm pin (13) and the arm pin cylinder (11) are arranged at the head of the basic arm (4).

6. The main boom telescopic mechanism according to claim 1, wherein the mechanical lock (5) is an automatic machine lock.

A vehicle crane, characterized in that it comprises a main arm telescopic mechanism according to any one of claims 1-6.