Five-section arm synchronous telescopic device

Abstract

The invention discloses a five-section arm synchronous telescopic device which comprises a first section arm, a second section arm, a third section arm, a fourth section arm, a fifth section arm, a first telescopic oil cylinder, a second telescopic oil cylinder, a first synchronous assembly and a second synchronous assembly, the second section arm is sleeved with the first section arm, the third section arm is sleeved with the second section arm, and the fourth section arm is sleeved with the fifth section arm. The fourth section arm is sleeved in the third section arm, the fifth section arm is sleeved in the fourth section arm, the first telescopic oil cylinder is respectively connected with the first section arm, the second section arm and the third section arm, the second telescopic oil cylinder is respectively connected with the third section arm, the fourth section arm and the fifth section arm, the first synchronous assembly is arranged between the first section arm and the third section arm, and the second synchronous assembly is arranged between the second section arm and the fifth section arm. And the second synchronous assembly is arranged between the third section arm and the fifth section arm. According to the invention, the on-load telescopic capability is effectively ensured, and the synchronous telescopic action of five sections of arms can be carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of telescopic arms, and in particular relates to a five-section arm synchronous telescopic device. Background Art

[0002] The telescopic arm is a telescopic device with one end fixed and the rest being a movable body, which is extended and retracted by a telescopic cylinder.

[0003] In the prior art, the five-section boom telescopic technology mainly adopts the double-cylinder rope-driven five-section boom synchronous telescopic and single-cylinder rope-driven five-section boom telescopic methods. When the double-cylinder rope-driven five-section boom is synchronously telescopic, only the third, fourth and fifth sections of the boom can be synchronously telescoped, and the second section of the boom needs to work alone, resulting in low work efficiency and poor telescopic ability under load. Under normal circumstances, it does not have the telescopic ability under load. When the single-cylinder rope-driven five-section boom is telescoped, although the five sections of the boom can be synchronously telescoped, the telescopic ability under load is poor and cannot meet the requirements of load-bearing operations. Summary of the invention

[0004] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a five-section boom synchronous telescopic device.

[0005] The five-section boom synchronous telescopic device of the present invention comprises a first section boom, a second section boom, a third section boom, a fourth section boom, a fifth section boom, a first telescopic oil cylinder, a second telescopic oil cylinder, a first synchronous assembly and a second synchronous assembly, the second section boom is sleeved in the first section boom, the third section boom is sleeved in the second section boom, the fourth section boom is sleeved in the third section boom, and the fifth section boom is sleeved in the fourth section boom, the first telescopic oil cylinder is respectively connected to the first section boom, the second section boom and the third section boom, the second telescopic oil cylinder is respectively connected to the third section boom, the fourth section boom and the fifth section boom, the first synchronous assembly is arranged between the first section boom and the third section boom, and the second synchronous assembly is arranged between the third section boom and the fifth section boom, wherein:

[0006] The first synchronous assembly includes a first pulley group and a second pulley group, the first pulley group is fixed at the front end of the second section arm, and the second pulley group is arranged at the rear end of the second section arm;

[0007] The second synchronous assembly includes a third pulley group and a fourth pulley group, the third pulley group is fixed to the front end of the fourth arm, and the fourth pulley group is arranged at the rear end of the fourth arm.

[0008] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the first telescopic oil cylinder includes a first mounting cylinder, a first-level telescopic cylinder and a first-level telescopic cylinder, the first-level telescopic cylinder is telescopically arranged in the first mounting cylinder, the first-level telescopic cylinder is telescopically arranged in the first-level telescopic cylinder, the top of the first-level telescopic cylinder is connected to the first section boom through a hinge shaft, the top of the first-level telescopic cylinder is connected to the second telescopic arm through bolts, and the top of the first mounting cylinder is connected to the third telescopic arm through bolts.

[0009] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the second telescopic oil cylinder includes a second mounting cylinder, a second-level telescopic cylinder and a second-level telescopic cylinder, the second-level telescopic cylinder is telescopically arranged in the second mounting cylinder, the second-level telescopic cylinder is telescopically arranged in the second-level telescopic cylinder, the top of the second-level telescopic cylinder is connected to the third section boom through a hinge shaft, the top of the second-level telescopic cylinder is connected to the fourth telescopic arm through bolts, and the top of the second mounting cylinder is connected to the fifth telescopic arm through bolts.

[0010] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the first pulley group includes a first pulley and a first cable, the first pulley is fixed to the front end of the second section boom through a pin shaft, and the first cable is fixedly connected to the front end of the first section boom at one end after passing around the first pulley, and the other end is fixedly connected to the rear end of the third section boom.

[0011] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the second pulley group includes a second pulley and a second cable, the second pulley is fixed to the rear end of the second section boom through a pin shaft, and after the second cable passes around the second pulley, one end is fixedly connected to the rear end of the third section boom, and the other end is fixedly connected to the front end of the first section boom.

[0012] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the third pulley group includes a third pulley and a third cable, the third pulley is fixed to the front end of the fourth section boom through a pin shaft, and after the third cable passes around the third pulley, one end is fixedly connected to the front end of the third section boom, and the other end is fixedly connected to the rear end of the fifth section boom.

[0013] Furthermore, in the above-mentioned five-section boom synchronous telescopic device, the fourth pulley group includes a fourth pulley and a fourth cable, the fourth pulley is fixed to the rear end of the fourth section boom through a pin shaft, and after the fourth cable passes around the fourth pulley, one end is fixedly connected to the rear end of the fifth section boom, and the other end is fixedly connected to the front end of the third section boom.

[0014] The five-section boom synchronous telescopic device of the present invention has the following advantages and beneficial effects:

[0015] The present invention has a simple structure and adopts the cooperation between the telescopic cylinder and the boom to effectively improve the load-bearing telescopic capacity. The second boom and the third boom can be synchronously telescoped through the cooperation of the first synchronous component and the first telescopic cylinder. The fourth boom and the fifth boom can be synchronously telescoped through the cooperation of the second synchronous component and the second telescopic cylinder. The third boom and the fourth boom can be synchronously telescoped by simultaneously controlling the synchronous telescopic extension of the first telescopic cylinder and the second telescopic cylinder, so that the five-section boom can be telescoped synchronously. At the same time, higher working efficiency can be effectively guaranteed when the telescopic length of the five-section boom changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the five-section boom synchronous telescopic device of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the first telescopic cylinder of the five-section boom synchronous telescopic device of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the second telescopic cylinder of the five-section boom synchronous telescopic device of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the first wheel pulley group of the five-section boom synchronous telescopic device of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the second wheel pulley group of the five-section boom synchronous telescopic device of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the third wheel pulley group of the five-section boom synchronous telescopic device of the present invention;

[0023] Figure 7 It is a schematic structural diagram of the fourth wheel pulley group of the five-section boom synchronous telescopic device of the present invention.

[0024] Description of reference numerals:

[0025] 1: first arm section; 2: second arm section; 3: third arm section; 4: fourth arm section; 5: fifth arm section;

[0026] 6: first telescopic oil cylinder, 61: first mounting cylinder, 62: first level telescopic cylinder, 63: first level telescopic cylinder;

[0027] 7: second telescopic oil cylinder, 71: second mounting cylinder, 72: second first-level telescopic cylinder, 73: second second-level telescopic cylinder;

[0028] 8: first synchronization component;

[0029] 81: first pulley block, 811: first pulley, 812: first cable;

[0030] 82: second pulley block, 821: second pulley, 822: second cable;

[0031] 9: second synchronization component;

[0032] 91: third pulley block, 911: third pulley, 912: third cable;

[0033] 92: fourth pulley block, 921: fourth pulley, 922: fourth cable. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 7 As shown, the five-section boom synchronous telescopic device of the present invention includes a first section boom 1, a second section boom 2, a third section boom 3, a fourth section boom 4, a fifth section boom 5, a first telescopic oil cylinder 6, a second telescopic oil cylinder 7, a first synchronous assembly 8 and a second synchronous assembly 9. The second section boom 2 is sleeved in the first section boom 1, the third section boom 3 is sleeved in the second section boom 2, the fourth section boom 4 is sleeved in the third section boom 3, and the fifth section boom 5 is sleeved in the fourth section boom 4. The first telescopic oil cylinder 6 is respectively connected to the first section boom 1, the second section boom 2 and the third section boom 3 for lifting. The load-carrying telescopic capacity of the first boom 1, the second boom 2 and the third boom 3 is improved, the second telescopic oil cylinder 7 is respectively connected to the third boom 3, the fourth boom 4 and the fifth boom 5, and is used to improve the load-carrying telescopic capacity of the third boom 3, the fourth boom 4 and the fifth boom 5, the first synchronous component 8 is arranged between the first boom 1 and the third boom 3, the second synchronous component 9 is arranged between the third boom 3 and the fifth boom 5, and is used to ensure that the first boom 1, the second boom 2, the third boom 3, the fourth boom 4 and the fifth boom 5 are synchronously telescopic, wherein:

[0036] The first synchronous assembly 8 includes a first pulley group 81 and a second pulley group 82, the first pulley group 81 is fixed to the front end of the second section arm 2, and the second pulley group 82 is arranged at the rear end of the second section arm 2;

[0037] The second synchronous assembly 9 includes a third pulley set 91 and a fourth pulley set 92 . The third pulley set 91 is fixed at the front end of the fourth arm 4 , and the fourth pulley set 92 is arranged at the rear end of the fourth arm 4 .

[0038] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the first telescopic oil cylinder 6 includes a first mounting cylinder 61, a first-level telescopic cylinder 62 and a first-level telescopic cylinder 63. The first-level telescopic cylinder 63 is telescopically arranged in the first mounting cylinder 61, and the first-level telescopic cylinder 62 is telescopically arranged in the first-level telescopic cylinder 63. The top of the first-level telescopic cylinder 62 is connected to the first section boom 1 through a hinge shaft, the top of the first-level telescopic cylinder 63 is connected to the second telescopic arm through bolts, and the top of the first mounting cylinder is connected to the third telescopic arm through bolts.

[0039] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the second telescopic oil cylinder 7 includes a second mounting cylinder 71, a second-level telescopic cylinder 72 and a second-level telescopic cylinder 73. The second-level telescopic cylinder 73 is telescopically arranged in the second mounting cylinder 71, and the second-level telescopic cylinder 72 is telescopically arranged in the second-level telescopic cylinder 73. The top of the second-level telescopic cylinder 72 is connected to the third section boom 3 through a hinge shaft, the top of the second-level telescopic cylinder 73 is connected to the fourth telescopic arm through bolts, and the top of the second mounting cylinder is connected to the fifth telescopic arm through bolts.

[0040] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the first pulley group 81 includes a first pulley 811 and a first cable 812. The first pulley 811 is fixed to the front end of the second section boom 2 through a pin shaft. After the first cable 812 passes around the first pulley 811, one end is fixedly connected to the front end of the first section boom 1, and the other end is fixedly connected to the rear end of the third section boom 3, thereby effectively ensuring that the pressure of the first mounting cylinder 61 and the first and second telescopic cylinders 63 are equal when they are extended, thereby realizing the synchronous extension of the second section boom 2 and the third section boom 3.

[0041] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the second pulley group 82 includes a second pulley 821 and a second cable 822. The second pulley 821 is fixed to the rear end of the second section boom 2 through a pin shaft. After the second cable 822 passes around the second pulley 821, one end is fixedly connected to the rear end of the third section boom 3, and the other end is fixedly connected to the front end of the first section boom 1, thereby effectively ensuring that the pressure of the first mounting cylinder 61 and the first and second telescopic cylinders 63 are equal when they are retracted, thereby realizing the synchronous retraction of the second section boom 2 and the third section boom 3.

[0042] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the third pulley group 91 includes a third pulley 911 and a third cable 912. The third pulley 911 is fixed to the front end of the fourth section boom 4 through a pin shaft. After the third cable 912 passes around the third pulley 911, one end is fixedly connected to the front end of the third section boom 3, and the other end is fixedly connected to the rear end of the fifth section boom 5, thereby effectively ensuring that the pressure of the second mounting cylinder 71 and the second secondary telescopic cylinder 73 are equal when they are extended, thereby realizing the synchronous extension of the fourth section boom 4 and the fifth section boom 5.

[0043] Furthermore, in the five-section boom synchronous telescopic device of the present invention, the fourth pulley group 92 includes a fourth pulley 921 and a fourth cable 922. The fourth pulley 921 is fixed to the rear end of the fourth section boom 4 through a pin shaft. After the fourth cable 922 passes around the fourth pulley 921, one end is fixedly connected to the rear end of the fifth section boom 5, and the other end is fixedly connected to the front end of the third section boom 3, thereby effectively ensuring that the pressure of the second mounting cylinder 71 and the second secondary telescopic cylinder 73 are equal when they are retracted, thereby realizing the synchronous retraction of the fourth section boom 4 and the fifth section boom 5.

[0044] Specifically, when the telescopic arm is extended, the first pulley block 81 adjusts the pressure of the first installation cylinder 61 and the first-level telescopic cylinder 62 to be consistent, and the second telescopic oil cylinder 7 adjusts the pressure of the second installation cylinder 71 and the second-level telescopic cylinder 72 to be consistent through the adjustment of the third pulley block 91, and the second section arm 2, the third section arm 3, the fourth section arm 4 and the fifth section arm 5 are synchronously extended by inputting hydraulic oil of the same pressure flow rate into the first telescopic oil cylinder 6 and the second telescopic oil cylinder 7. During the extension process, the first section arm 1 is a fixed arm and the first-level telescopic cylinder 62 is extended along the first-level telescopic cylinder 63, the first installation cylinder 61 is extended along the first-level telescopic cylinder 62, the second-level telescopic cylinder 72 is extended along the second-level telescopic cylinder 73, and the second installation cylinder 71 is extended along the second-level telescopic cylinder 72;

[0045] When the telescopic arm is retracted, the second pulley block 82 is adjusted to make the pressure of the first mounting cylinder 61 and the first-level telescopic cylinder 62 consistent, and the second telescopic oil cylinder 7 is adjusted by the fourth pulley block 92 to make the pressure of the second mounting cylinder 71 and the second-level telescopic cylinder 72 consistent, and by inputting hydraulic oil with the same pressure flow rate into the first telescopic oil cylinder 6 and the second telescopic oil cylinder 7, the second section arm 2, the third section arm 3, the fourth section arm 4 and the fifth section arm 5 are retracted synchronously. During the retraction process, the first section arm 1 is a fixed arm, and the first-level telescopic cylinder 63 retracts along the first-level telescopic cylinder 62, the first mounting cylinder 61 retracts along the first-level telescopic cylinder 62, the second-level telescopic cylinder 72 retracts along the second-level telescopic cylinder 73, and the second mounting cylinder 71 retracts along the second-level telescopic cylinder 72.

[0046] In summary, compared with the prior art, the five-section boom synchronous telescopic device of the present invention has the following advantages and beneficial effects: the present invention has a simple structure, and adopts the cooperation between the telescopic cylinder and the boom to effectively improve the load-bearing telescopic capacity, and through the cooperation of the first synchronous component and the second synchronous component, it effectively ensures that the five-section boom can telescope synchronously, and at the same time, it can effectively ensure higher work efficiency when the telescopic length of the five-section boom changes.

[0047] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A five-section boom synchronous telescopic device, characterized in that: The five-section boom synchronous telescopic device comprises a first section boom, a second section boom, a third section boom, a fourth section boom, a fifth section boom, a first telescopic oil cylinder, a second telescopic oil cylinder, a first synchronous assembly and a second synchronous assembly, the second section boom is sleeved in the first section boom, the third section boom is sleeved in the second section boom, the fourth section boom is sleeved in the third section boom, and the fifth section boom is sleeved in the fourth section boom, the first telescopic oil cylinder is respectively connected to the first section boom, the second section boom and the third section boom, the second telescopic oil cylinder is respectively connected to the third section boom, the fourth section boom and the fifth section boom, the first synchronous assembly is arranged between the first section boom and the third section boom, and the second synchronous assembly is arranged between the third section boom and the fifth section boom, wherein: The first synchronous assembly includes a first pulley group and a second pulley group, the first pulley group is fixed at the front end of the second section arm, and the second pulley group is arranged at the rear end of the second section arm; The second synchronous assembly includes a third pulley group and a fourth pulley group, the third pulley group is fixed to the front end of the fourth arm, and the fourth pulley group is arranged at the rear end of the fourth arm.

2. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The first telescopic oil cylinder includes a first mounting cylinder, a first-level telescopic cylinder and a first-level telescopic cylinder. The first-level telescopic cylinder is telescopically arranged in the first mounting cylinder, the first-level telescopic cylinder is telescopically arranged in the first-level telescopic cylinder, the top of the first-level telescopic cylinder is connected to the first section arm through a hinge shaft, the top of the first-level telescopic cylinder is connected to the second telescopic arm through bolts, and the top of the first mounting cylinder is connected to the third telescopic arm through bolts.

3. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The second telescopic oil cylinder includes a second mounting cylinder, a second-level telescopic cylinder and a second-level telescopic cylinder. The second-level telescopic cylinder is telescopically arranged in the second mounting cylinder. The second-level telescopic cylinder is telescopically arranged in the second-level telescopic cylinder. The top of the second-level telescopic cylinder is connected to the third arm through a hinge shaft. The top of the second-level telescopic cylinder is connected to the fourth telescopic arm through bolts. The top of the second mounting cylinder is connected to the fifth telescopic arm through bolts.

4. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The first pulley group includes a first pulley and a first cable. The first pulley is fixed to the front end of the second arm through a pin shaft. After the first cable passes around the first pulley, one end is fixedly connected to the front end of the first arm, and the other end is fixedly connected to the rear end of the third arm.

5. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The second pulley group includes a second pulley and a second cable. The second pulley is fixed to the rear end of the second arm through a pin shaft. After the second cable passes around the second pulley, one end is fixedly connected to the rear end of the third arm, and the other end is fixedly connected to the front end of the first arm.

6. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The third pulley group includes a third pulley and a third cable. The third pulley is fixed to the front end of the fourth arm through a pin shaft. After the third cable passes around the third pulley, one end is fixedly connected to the front end of the third arm, and the other end is fixedly connected to the rear end of the fifth arm.

7. The five-section boom synchronous telescopic device according to claim 1, characterized in that: The fourth pulley block includes a fourth pulley and a fourth cable. The fourth pulley is fixed to the rear end of the fourth arm through a pin shaft. After the fourth cable passes around the fourth pulley, one end is fixedly connected to the rear end of the fifth arm, and the other end is fixedly connected to the front end of the third arm.

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