Telescopic arm assembly

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a telescopic arm assembly. Comprising a first-section arm and a second-section arm, and further comprises a stay wire sensor fixed to the first-section arm through a first bolt, and a second-section arm fixed to the second-section arm through a second bolt, the stay wire guide wheel bracket is fixed on the first section arm through a second bolt; the front end of a stay wire of the stay wire sensor penetrates through the stay wire guide wheel support and then is connected to the two-section arm through a third bolt. Compared with the prior art, by means of the double-guide-wheel guide structure, deflection of the stay wire caused by swing between the arm sections is eliminated, the guide wheel support plays a role in guiding pull-out and retraction of the stay wire, the stay wire can be horizontally pulled out in the pull-out and retraction states and is not affected by gap swing of the second-section arm in the first-section arm, and therefore the purposes of reducing abrasion of the stay wire and improving the safety of the stay wire are achieved. And the wire drawing precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, in particular to a telescopic arm assembly. BACKGROUND

[0002] The telescopic arm is a key component of many engineering machinery devices, which functions to extend and retract the working device of the equipment, thereby expanding the working range of the equipment.

[0003] The displacement detection device of the existing telescopic arm generally has the problems of easy wear of the pull wire and insufficient detection accuracy. In the traditional structure, the pull wire is directly connected to the telescopic arm section, and when the arm section moves, the clearance swing between the arm sections causes the pull wire to generate non-axial force, which accelerates the wear and affects the measurement accuracy. CONTENT OF THE INVENTION

[0004] The embodiment of the present application aims to provide a telescopic arm assembly with an anti-swing structure, which effectively reduces the wear of the pull wire and improves the detection accuracy by improving the design of the guide wheel support.

[0005] The technical scheme adopted by the embodiment of the present application is as follows: a telescopic arm assembly, comprising a one-section arm and a two-section arm, the telescopic arm assembly further comprising:

[0006] a pull wire sensor, the pull wire sensor being fixed on the one-section arm by a first bolt;

[0007] a pull wire guide wheel support, the pull wire guide wheel support being fixed on the one-section arm by a second bolt; wherein the front end of the pull wire of the pull wire sensor passes through the pull wire guide wheel support and is connected to the two-section arm by a third bolt.

[0008] The embodiment of the present application further discloses that the pull wire guide wheel support comprises:

[0009] a fixed plate;

[0010] a guide wheel support weldment, the guide wheel support weldment being arranged on the fixed plate;

[0011] two guide wheels, the guide wheels being installed on the guide wheel support weldment by a rotating shaft; and

[0012] a gasket, the gasket being arranged on both sides of the guide wheels.

[0013] The embodiment of the present application further discloses that the guide wheels comprise an upper guide wheel and a lower guide wheel.

[0014] The embodiment of the present application further discloses that the pull wire passes through the upper guide wheel and the lower guide wheel in a horizontal S-shaped path.

[0015] The embodiment of the present application further discloses that the gasket is a metal ring structure.

[0016] The gasket has an outer diameter greater than a flange diameter of the guide wheel.

[0017] The pull wire guide wheel support forms a closed mounting structure with the arm segment through the second bolt.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The double guide wheel guide structure eliminates the pull wire deflection caused by the swing between the arm segments, the guide wheel support plays a guiding role in pulling out and retracting the pull wire, so that the pull wire can be pulled out horizontally in the pulled out and retracted state, and is not affected by the swing of the two arm segments in the one arm segment, thereby achieving the purposes of reducing the pull wire wear and improving the pull wire precision;

[0020] 2. The anti-displacement gasket design effectively prevents the axial movement of the guide wheel;

[0021] 3. The closed mounting structure improves the overall stability;

[0022] 4. The S-shaped winding path prolongs the service life of the pull wire. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0024] Fig. 2 It is an enlarged schematic diagram of the pull wire guide wheel support and the pull wire sensor part in the embodiment of the present application;

[0025] In the figure: 1, one arm segment, 2, two arm segments, 3, third bolt, 4, pull wire guide wheel support, 4-1, support weldment, 4-2, guide wheel, 4-3, gasket, 4-4, fixed plate, 5, second bolt, 6, pull wire sensor, 7, first bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0027] As Figs. 1-2 shown, a telescopic arm assembly includes one arm segment 1 and two arm segments 2, and the telescopic arm assembly further includes:

[0028] A pull wire sensor 6 is fixed on the one-section arm 1 by a first bolt 7;

[0029] A pull wire guide wheel support 4 is fixed on the one-section arm 1 by a second bolt 5; wherein the front end of the pull wire sensor 6 passes through the pull wire guide wheel support 4 and is connected to the two-section arm 2 by a third bolt 3.

[0030] Further, the pull wire guide wheel support comprises:

[0031] A fixed plate;

[0032] A guide wheel support weldment arranged on the fixed plate;

[0033] Two guide wheels mounted on the guide wheel support weldment through rotating shafts; and

[0034] A gasket arranged on both sides of the guide wheels.

[0035] The embodiment of the present application further discloses that the guide wheels comprise upper guide wheels and lower guide wheels.

[0036] The embodiment of the present application further discloses that the pull wire passes through the upper guide wheels and the lower guide wheels in a horizontal S-shaped path.

[0037] The embodiment of the present application further discloses that the gasket is a metal ring structure.

[0038] The embodiment of the present application further discloses that the outer diameter of the gasket is greater than the rim diameter of the guide wheels.

[0039] The embodiment of the present application further discloses that the pull wire guide wheel support forms a closed mounting structure with the one-section arm through the second bolt.

[0040] In implementation, first, the pull wire sensor 6 is mounted on the predetermined position of the one-section arm 1 through the first bolt 7. The pull wire guide wheel support 4 is fixed on the front end of the one-section arm 1 through the second bolt 5, and the inside of the pull wire guide wheel support 4 is provided with two groups of upper and lower guide wheels 4-2, and the two sides of the guide wheels are provided with anti-displacement gaskets 4-3. The pull wire is led out from the pull wire sensor 6, and then passes through the upper guide wheels and the lower guide wheels in sequence, and finally is fixed on the end portion of the two-section arm 2 through the third bolt 3. When the two-section arm 2 is driven to stretch and retract by the oil cylinder, the pull wire keeps horizontal movement through the guiding effect of the guide wheel group, and effectively avoids the deflection friction caused by the swing of the arm section.

[0041] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. A telescopic boom assembly, comprising a first boom section and a second boom section, characterized in that: The telescopic boom assembly also includes: A pull-wire sensor, which is fixed to one arm section by a first bolt; A pull wire guide wheel bracket is fixed to the first arm section by a second bolt; wherein, the front end of the pull wire of the pull wire sensor passes through the pull wire guide wheel bracket and is connected to the second arm section by a third bolt.

2. The telescopic boom assembly according to claim 1, characterized in that: The wire guide wheel bracket includes: Fixing plate; A guide wheel bracket weldment is disposed on the fixing plate; Two guide wheels, which are mounted on a guide wheel bracket weldment via a rotating shaft; and, Gaskets are disposed on both sides of the guide wheel.

3. The telescopic boom assembly according to claim 2, characterized in that: The guide wheel includes an upper guide wheel and a lower guide wheel.

4. The telescopic boom assembly according to claim 3, characterized in that: The pull cable travels in a horizontal S-shaped path around the upper and lower guide wheels.

5. The telescopic boom assembly according to claim 2, characterized in that: The gasket has a metal ring structure.

6. The telescopic boom assembly according to claim 5, characterized in that: The outer diameter of the gasket is larger than the rim diameter of the guide wheel.

7. The telescopic boom assembly according to claim 1, characterized in that: The guide wheel bracket is connected to a section of arm via a second bolt to form a closed installation structure.

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