A working arm telescoping device

Abstract

The utility model relates to a working arm telescopic device belongs to the high altitude operation vehicle field, the utility model discloses telescopic oil cylinder, outer arm and inner arm, the inner arm is installed in outer arm, and is driven by telescopic oil cylinder and moves in telescopic in the inner arm in outer arm, its structural characteristics lie in: still include telescopic support, contract chain sprocket, contract chain, stretch chain and stretch chain sprocket, contract chain sprocket and stretch chain sprocket all install on telescopic support, the piston rod of telescopic oil cylinder is connected with stretch chain sprocket, the cylinder barrel of telescopic oil cylinder installs on outer arm, contract chain and stretch chain respectively pass contract chain sprocket and stretch chain sprocket, one end of contract chain and the one end of stretch chain all are connected with the cylinder barrel of telescopic oil cylinder, the other end of contract chain and the other end of stretch chain are connected, and all are connected with inner arm, telescopic support installs on the cylinder barrel outside of telescopic oil cylinder, and telescopic support can move relative to the cylinder barrel of telescopic oil cylinder.

Description

Technical Field

[0001] This utility model relates to a telescopic boom device, belonging to the field of aerial work platforms. Background Technology

[0002] Aerial work platforms are widely used in the power industry. However, the insulated arms of current aerial work platforms are driven by hydraulic cylinders. The extension rod of the hydraulic cylinder is directly connected to the insulated arm, and the stroke of the hydraulic cylinder is the length that the insulated arm can extend or retract. This results in a small effective length of the insulated arm, which limits the working area and affects work safety. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings in the existing technology and to provide a working arm telescopic device with a reasonable structural design.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: The working arm telescopic device includes a telescopic cylinder, an outer arm, and an inner arm. The inner arm is installed on the outer arm and is driven by the telescopic cylinder to telescopically move within the outer arm. Its structural features are: it also includes a telescopic bracket, a retracting chain groove wheel, a retracting chain, an extending chain, and an extending chain groove wheel. The retracting chain groove wheel and the extending chain groove wheel are both installed on the telescopic bracket. The piston rod of the telescopic cylinder is connected to the extending chain groove wheel. The cylinder of the telescopic cylinder is installed on the outer arm. The retracting chain and the extending chain pass around the retracting chain groove wheel and the extending chain groove wheel, respectively. One end of the retracting chain and one end of the extending chain are both connected to the cylinder of the telescopic cylinder. The other end of the retracting chain is connected to the other end of the extending chain and is also connected to the inner arm.

[0005] Furthermore, the telescopic bracket is installed on the outside of the cylinder of the telescopic cylinder, and the telescopic bracket can move relative to the cylinder of the telescopic cylinder.

[0006] Furthermore, one end of the retracting chain and one end of the extending chain are both connected to the second connecting support, which is mounted on the cylinder of the telescopic cylinder.

[0007] Furthermore, the other end of the retractable chain and the other end of the extended chain are both connected to the first connecting support, which is connected to the inner arm.

[0008] Furthermore, the number of telescopic brackets is two, and the two telescopic brackets are connected by a connecting plate.

[0009] Furthermore, one end of the shrink chain is connected to an adjusting bolt, which is mounted on the second connecting support.

[0010] Furthermore, the cylinder of the telescopic cylinder is mounted on the outer arm via a first pin, the retracting chain groove wheel is mounted on the telescopic bracket via a second pin, and the extending chain groove wheel is mounted on the telescopic bracket via a third pin, which is connected to the piston rod of the telescopic cylinder.

[0011] Compared with the prior art, the present invention has the following advantages: the telescopic arm device can extend the length of the inner arm by combining the telescopic cylinder with the retracting chain and the extending chain. That is, the piston rod of the telescopic cylinder drives the extending chain, the extending chain groove wheel, and the first connecting support. When the stroke of the telescopic cylinder is X, the movement stroke of the first connecting support is 2X, and the corresponding movement stroke of the inner arm is 2X. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural schematic diagram of the telescopic arm device according to an embodiment of the present utility model.

[0013] Figure 2 This is a three-dimensional structural diagram of the telescopic arm device (fully retracted mode) according to an embodiment of this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the working arm telescopic device (fully extended condition) according to an embodiment of this utility model.

[0015] Figure 4 This is a schematic diagram of the internal structure of the telescopic arm device according to an embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the internal structure of the telescopic arm device according to an embodiment of the present invention.

[0017] Figure 6 This is a schematic diagram of the state structure of the telescopic arm device (fully retracted mode) according to an embodiment of this utility model.

[0018] Figure 7 This is a schematic diagram of the working arm telescopic device (fully extended working condition) according to an embodiment of this utility model.

[0019] In the diagram: 1. Telescopic cylinder; 2. Telescopic bracket; 3. Retracting chain groove wheel; 4. Retracting chain; 5. Extending chain; 6. Extending chain groove wheel; 7. First connecting support; 8. Outer arm; 9. Inner arm; 10. Connecting plate; 11. Second connecting support; 12. Adjusting bolt; 13. First pin; 14. Second pin; 15. Third pin. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0021] Example

[0022] See Figures 1 to 7 As shown in the accompanying drawings, the structures, proportions, sizes, etc., depicted in this specification are merely for illustrative purposes to aid those skilled in the art and to provide a clear understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is solely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0023] The telescopic arm device in this embodiment includes a telescopic cylinder 1, a telescopic bracket 2, a retracting chain groove wheel 3, a retracting chain 4, an extending chain 5, an extending chain groove wheel 6, an outer arm 8, and an inner arm 9. The inner arm 9 is installed on the outer arm 8 and is driven by the telescopic cylinder 1 to telescopically move within the outer arm 8. The telescopic bracket 2 is installed on the outside of the cylinder of the telescopic cylinder 1 and can move relative to the cylinder of the telescopic cylinder 1.

[0024] In this embodiment, the chain retraction groove wheel 3 and the chain extension groove wheel 6 are both mounted on the telescopic bracket 2. The piston rod of the telescopic cylinder 1 is connected to the chain extension groove wheel 6. The cylinder of the telescopic cylinder 1 is mounted on the outer arm 8. The chain retraction 4 and the chain extension 5 pass around the chain retraction groove wheel 3 and the chain extension groove wheel 6 respectively. There are two telescopic brackets 2, and the two telescopic brackets 2 are connected by a connecting plate 10.

[0025] In this embodiment, one end of the retracting chain 4 and one end of the extending chain 5 are both connected to the cylinder of the telescopic cylinder 1. The other end of the retracting chain 4 is connected to the other end of the extending chain 5 and is also connected to the inner arm 9. That is, one end of the retracting chain 4 and one end of the extending chain 5 are both connected to the second connecting support 11, which is mounted on the cylinder of the telescopic cylinder 1. The other end of the retracting chain 4 and the other end of the extending chain 5 are both connected to the first connecting support 7, which is connected to the inner arm 9. One end of the retracting chain 4 is connected to the adjusting bolt 12, which is mounted on the second connecting support 11.

[0026] In this embodiment, the cylinder of the telescopic cylinder 1 is mounted on the outer arm 8 via a first pin 13, the retracting chain groove wheel 3 is mounted on the telescopic bracket 2 via a second pin 14, and the extending chain groove wheel 6 is mounted on the telescopic bracket 2 via a third pin 15, and the third pin 15 is connected to the piston rod of the telescopic cylinder 1.

[0027] The telescopic method of the working arm telescopic device in this embodiment is as follows: When the inner arm 9 extends relative to the outer arm 8: when the extension chain groove wheel 6 is pushed out by the telescopic cylinder 1, the distance between the second connecting support 11 and the extension chain groove wheel 6 increases, while the distance between the second connecting support 11 and the first connecting support 7 decreases. At the same time, the first connecting support 7 is moved by the extension chain 5, and the inner arm 9 can be pulled to extend on the outer arm 8 by the first connecting support 7.

[0028] When the inner arm 9 retracts relative to the outer arm 8: when the extension chain groove wheel 6 is pulled back by the telescopic cylinder 1, the distance between the second connecting support 11 and the extension chain groove wheel 6 is reduced, and the distance between the second connecting support 11 and the first connecting support 7 is increased. At the same time, the first connecting support 7 is moved by the retraction chain 4, and then the inner arm 9 can be pulled back on the outer arm 8 by the first connecting support 7.

[0029] Specifically, the cylinder of the telescopic cylinder 1 and the outer arm 8 (steel arm) are hinged by the first pin 13, the retracting chain groove wheel 3 and the telescopic bracket 2 are hinged by the second pin 14, the extending chain groove wheel 6, the piston rod of the telescopic cylinder 1 and one end of the telescopic bracket 2 are hinged by the third pin 15, and the other end of the telescopic bracket 2 is connected to the left and right sides by the connecting plate 10, which can slide on the outside of the cylinder of the telescopic cylinder 1 along the telescopic direction of the telescopic cylinder 1.

[0030] One end of the retractable chain 4 is mounted on the second connecting support 11 via adjusting bolt 12. The second connecting support 11 is fastened to the cylinder of the telescopic cylinder 1. The other end of the retractable chain 4 is mounted on the first connecting support 7. One end of the extending chain 5 is mounted on the second connecting support 11, and the other end of the extending chain 5 is mounted on the first connecting support 7. The first connecting support 7 is mounted on the inner arm 9 (insulating arm).

[0031] In simple terms, the telescopic cylinder 1 extends the piston rod via hydraulic drive, which in turn drives the extension chain groove wheel 6 and the extension chain 5, dragging the first connecting support 7 and the inner arm 9 (insulated arm) forward. Conversely, when the telescopic cylinder 1 retracts, the piston rod and the telescopic bracket 2 retract simultaneously, which in turn drives the retraction chain groove wheel 3 and the retraction chain 4, dragging the first connecting support 7 and the inner arm 9 (insulated arm) backward. The retraction chain 4 and the extension chain 5 are not limited to chains; they can also be steel wire ropes, etc.

[0032] When the telescopic cylinder 1 in the telescopic boom device extends, the piston rod of the telescopic cylinder 1 drives the extension chain 5, the extension chain groove wheel 6, and the first connecting support 7. When the stroke of the telescopic cylinder 1 is X, the movement stroke of the first connecting support 7 is 2X. The corresponding movement stroke of the inner arm 9 (insulated arm) is also 2X. That is, the effective insulation length of the inner arm 9 (insulated arm) increases from A to A+2X. It can be seen that the telescopic stroke of the inner arm 9 (insulated arm) in this telescopic boom device is twice the stroke of the telescopic cylinder 1. In other words, the stroke of the telescopic support 2 is X, and the stroke of the first connecting support 7 relative to the telescopic support 2 is X. Therefore, the total stroke of the first connecting support 7 is 2X.

[0033] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model are included within the protection scope of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A telescopic boom device, comprising a telescopic cylinder (1), an outer boom (8), and an inner boom (9), wherein the inner boom (9) is mounted on the outer boom (8) and is driven by the telescopic cylinder (1) to telescopically move within the outer boom (8), characterized in that: It also includes a telescopic bracket (2), a shrink chain groove wheel (3), a shrink chain (4), an extend chain (5), and an extend chain groove wheel (6). The shrink chain groove wheel (3) and the extend chain groove wheel (6) are both mounted on the telescopic bracket (2). The piston rod of the telescopic cylinder (1) is connected to the extend chain groove wheel (6). The cylinder of the telescopic cylinder (1) is mounted on the outer arm (8). The shrink chain (4) and the extend chain (5) pass around the shrink chain groove wheel (3) and the extend chain groove wheel (6), respectively. One end of the shrink chain (4) and one end of the extend chain (5) are both connected to the cylinder of the telescopic cylinder (1). The other end of the shrink chain (4) is connected to the other end of the extend chain (5) and both are connected to the inner arm (9).

2. A reach device according to claim 1, wherein: The telescopic bracket (2) is installed on the outside of the cylinder of the telescopic cylinder (1), and the telescopic bracket (2) can move relative to the cylinder of the telescopic cylinder (1).

3. The working arm retraction device of claim 1, wherein: One end of the retracting chain (4) and one end of the extending chain (5) are both connected to the second connecting support (11), which is installed on the cylinder of the telescopic cylinder (1).

4. The working arm retraction device of claim 1, wherein: The other end of the retractable chain (4) and the other end of the extended chain (5) are both connected to the first connecting support (7), which is connected to the inner arm (9).

5. The working arm retraction device of claim 1, wherein: The number of telescopic brackets (2) is two, and the two telescopic brackets (2) are connected by a connecting plate (10).

6. The working arm retraction device of claim 3, wherein: One end of the shrink chain (4) is connected to the adjusting bolt (12), which is mounted on the second connecting support (11).

7. The working arm retraction device of claim 1, wherein: The cylinder of the telescopic cylinder (1) is mounted on the outer arm (8) via a first pin (13), the retracting chain groove wheel (3) is mounted on the telescopic bracket (2) via a second pin (14), and the extending chain groove wheel (6) is mounted on the telescopic bracket (2) via a third pin (15), and the third pin (15) is connected to the piston rod of the telescopic cylinder (1).

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