Telescopic boom of crane

Abstract

The utility model discloses a crane telescopic boom which comprises a U-shaped supporting plate fixedly connected to the top of an outer-section sleeve through bolts, the left side and the right side of the U-shaped supporting plate are both rotationally connected with perforated bending rods, the top of the U-shaped supporting plate is fixedly connected with a thickening plate through bolts, a supporting threaded sleeve is welded to the top of the thickening plate, and the supporting threaded sleeve is fixedly connected with the top of the U-shaped supporting plate through bolts. A threaded rod is rotatably connected to an inner cavity of the supporting threaded sleeve, and a supporting shaft sleeve is in threaded connection with the surface of the threaded rod. The threaded rod is rotated to drive the supporting shaft sleeve to slide downwards, and then the connecting plate is driven to push the trepanning bending rod to deflect anticlockwise; and further, the perforated bending rod drives the concave surface supporting roller to deflect upwards and support the movable arm rod, so that the situation that the arm rod falls and deforms due to large friction of the telescopic arm rod caused by large falling force of the movable arm rod can be avoided, and the purpose of prolonging the service life of the telescopic arm is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a crane telescopic boom. Background Technology

[0002] When a crane's telescopic boom is used for lifting, the downward force of the boom extension is significant. To prevent the boom from deforming due to this force, a new type of crane telescopic boom has been designed. This boom incorporates a concave support roller between the outer sleeve and the boom. Through leverage, this roller supports the boom, preventing excessive friction and subsequent deformation caused by the downward force. This design improves the boom's service life. Utility Model Content

[0003] The purpose of this utility model is to provide a crane telescopic boom that avoids excessive friction in the telescopic boom due to excessive downward force, which could ultimately lead to deformation and sagging, thereby improving the service life of the telescopic boom and solving the aforementioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A crane telescopic boom includes a U-shaped support plate fixedly connected to the top of an outer sleeve by bolts; both sides of the U-shaped support plate are rotatably connected to perforated bent rods; the top of the U-shaped support plate is fixedly connected to a thickened plate by bolts; a support threaded sleeve is welded to the top of the thickened plate; a threaded rod is rotatably connected to the inner cavity of the support threaded sleeve; a support bushing is threadedly connected to the surface of the threaded rod; connecting round rods are fixedly connected to the inner cavities of both sides of the support bushing; connecting plates are rotatably connected to the surfaces of the two connecting round rods; and the connecting plates are rotatably connected to connecting bolts.

[0005] Preferably, the two sides of the perforated bent rod are fixedly connected to a long cylindrical rod, and the surface of the long cylindrical rod is rotatably connected to a concave support roller.

[0006] Preferably, both ends of the concave support roller are fixedly connected to limit rings, and the inner cavities of the two limit rings are rotatably connected to the surface of the long cylindrical rod.

[0007] Preferably, the left and right sides of the U-shaped support plate are fixedly connected with support positioning bolts, and the inner cavity of the perforated bent rod is rotatably connected to the surface of the support positioning bolts.

[0008] Preferably, each of the opposite sides of the perforated bent rod is fixedly connected to a connecting bolt, and the bottom of the connecting plate is rotatably connected to the surface of the connecting bolt.

[0009] Preferably, a rotating disk is fixedly connected to the top end of the threaded rod, a movable arm is slidably connected to the inner cavity of the outer sleeve, and the surface of the concave support roller is rotatably connected to the movable arm.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model uses the rotation of the threaded rod to drive the support bushing to slide downwards, which in turn drives the connecting plate to push the perforated bending rod to deflect counterclockwise. This causes the perforated bending rod to drive the concave support roller to deflect upwards and support the movable arm. This achieves the purpose of avoiding the situation where the movable arm has a large downward force, resulting in large friction of the telescopic arm and ultimately causing the arm to sag and deform, thereby improving the service life of the telescopic arm.

[0012] 2. By setting a limiting ring, this utility model can limit the movement of the movable arm on the surface of the concave support roller when the movable arm extends and drives the concave support roller to rotate.

[0013] 3. By setting up a rotating disk, this utility model can increase the contact area between the top of the threaded rod and the worker when the worker rotates the threaded rod to drive the support bushing to slide, making the rotation process more labor-saving. Attached Figure Description

[0014] in:

[0015] Figure 1 This is a front view schematic diagram of one embodiment of the present utility model;

[0016] Figure 2 This is a front view schematic diagram of one embodiment of the present utility model;

[0017] Figure 3 This is a left-side view of one embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram showing the disassembled U-shaped support plate portion of one embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Outer sleeve; 2. U-shaped support plate; 3. Perforated bending rod; 4. Thickened plate; 5. Support threaded sleeve; 6. Threaded rod; 7. Support bushing; 8. Connecting round rod; 9. Connecting plate; 10. Long round rod; 11. Concave support roller; 12. Limiting ring; 13. Support positioning bolt; 14. Connecting bolt; 15. Rotating disk; 16. Movable arm. Detailed Implementation

[0021] In the following description, embodiments of the crane telescopic boom of the present invention will be described with reference to the accompanying drawings. Example 1

[0022] Figure 1-4 This invention illustrates an embodiment of a crane telescopic boom, comprising: a U-shaped support plate 2 bolted to the top of an outer sleeve 1; perforated bent rods 3 rotatably connected to both sides of the U-shaped support plate 2; a thickened plate 4 bolted to the top of the U-shaped support plate 2; a support sleeve 5 welded to the top of the thickened plate 4; a threaded rod 6 rotatably connected to the inner cavity of the support sleeve 5; a support bushing 7 threadedly connected to the surface of the threaded rod 6; connecting round rods 8 fixedly connected to the inner cavities of both sides of the support bushing 7; connecting plates 9 rotatably connected to the surfaces of both connecting round rods 8; and connecting plates 9 rotatably connected to connecting bolts 14. Two bent rods with openings 3 are fixedly connected to a long round rod 10 on opposite sides. A concave support roller 11 is rotatably connected to the surface of the long round rod 10. With the setting of the limiting ring 12, when the concave support roller 11 supports the movable arm 16, when the movable arm 16 extends and drives the concave support roller 11 to rotate, the movable arm 16 can be limited on the surface of the concave support roller 11. Limiting rings 12 are fixedly connected to both the left and right ends of the concave support roller 11. The inner cavities of the two limiting rings 12 are rotatably connected to the surface of the long round rod 10. Support positioning bolts 13 are fixedly connected to both the left and right sides of the U-shaped support plate 2. Example 2

[0023] Figure 1-4 This invention illustrates an embodiment of a crane telescopic boom, comprising: a U-shaped support plate 2 bolted to the top of an outer sleeve 1; perforated bent rods 3 rotatably connected to both sides of the U-shaped support plate 2; a thickened plate 4 bolted to the top of the U-shaped support plate 2; a support sleeve 5 welded to the top of the thickened plate 4; a threaded rod 6 rotatably connected to the inner cavity of the support sleeve 5; a support bushing 7 threadedly connected to the surface of the threaded rod 6; connecting round rods 8 fixedly connected to the inner cavities of both sides of the support bushing 7; connecting plates 9 rotatably connected to the surfaces of both connecting round rods 8; and connecting plates 9 rotatably connected to connecting bolts 14. The inner cavity of the perforated bent rod 3 is rotatably connected to the surface of the support positioning bolt 13. The two perforated bent rods 3 are fixedly connected to the opposite sides of the connecting bolt 14. The bottom of the connecting plate 9 is rotatably connected to the surface of the connecting bolt 14. The top of the threaded rod 6 is fixedly connected to the rotating disk 15. By setting the rotating disk 15, the contact area between the top of the threaded rod 6 and the worker can be increased when the worker rotates the threaded rod 6 to drive the support bushing 7 to slide, which can make the rotation process more labor-saving. The inner cavity of the outer sleeve 1 is slidably connected to the movable arm 16. The surface of the concave support roller 11 is rotatably connected to the movable arm 16.

[0024] Working principle: When using this utility model, the user fixes the U-shaped support plate 2 to the top of the outer sleeve 1, then rotates the rotating disk 15 to drive the threaded rod 6 to rotate, which in turn causes the support bushing 7 on the surface of the threaded rod 6 to slide downwards, and drives the connecting plate 9 to rotate through the connecting round rod 8. At this time, the limiting support of the support positioning bolt 13 causes the connecting plate 9 to push the perforated bending rod 3 to deflect counterclockwise, which in turn causes the perforated bending rod 3 to drive the concave support roller 11 to deflect upwards, which in turn causes the concave support roller 11 to support the movable arm 16, thereby giving the movable arm 16 additional support force. This avoids the situation where the movable arm has a large downward force, which leads to large friction of the telescopic arm and ultimately causes the arm to fall and deform, thus improving the service life of the telescopic arm.

[0025] In summary, this crane telescopic boom, by rotating the threaded rod 6 to drive the support bushing 7 to slide downwards, then drives the connecting plate 9 to push the perforated bending rod 3 to deflect counterclockwise, which in turn causes the perforated bending rod 3 to drive the concave support roller 11 to deflect upwards and support the movable boom 16. This achieves the goal of avoiding excessive friction in the telescopic boom due to the large downward force of the movable boom, which would ultimately lead to the boom sagging and deformation, thus improving the service life of the telescopic boom.

Claims

1. A crane telescopic boom, characterized in that, Includes a U-shaped support plate (2) fixedly connected to the top of the outer sleeve (1) by bolts: the left and right sides of the U-shaped support plate (2) are rotatably connected with perforated bent rods (3), the top of the U-shaped support plate (2) is fixedly connected with a thickened plate (4) by bolts, the top of the thickened plate (4) is welded with a support threaded sleeve (5), the inner cavity of the support threaded sleeve (5) is rotatably connected with a threaded rod (6), the surface of the threaded rod (6) is threadedly connected with a support bushing (7), the inner cavities of the left and right sides of the support bushing (7) are fixedly connected with connecting round rods (8), the surfaces of the two connecting round rods (8) are rotatably connected with connecting plates (9), and the connecting plates (9) are rotatably connected with connecting bolts (14).

2. The crane telescopic boom according to claim 1, characterized in that, The two perforated bent rods (3) are fixedly connected to a long round rod (10) on opposite sides, and a concave support roller (11) is rotatably connected to the surface of the long round rod (10).

3. The crane telescopic boom according to claim 2, characterized in that, Both ends of the concave support roller (11) are fixedly connected to limit rings (12), and the inner cavities of the two limit rings (12) are rotatably connected to the surface of the long round rod (10).

4. The crane telescopic boom according to claim 3, characterized in that, The left and right sides of the U-shaped support plate (2) are fixedly connected with support positioning bolts (13), and the inner cavity of the perforated bent rod (3) is rotatably connected to the surface of the support positioning bolts (13).

5. The crane telescopic boom according to claim 4, characterized in that, Both of the two perforated bent rods (3) are fixedly connected to a connecting bolt (14) on opposite sides, and the bottom of the connecting plate (9) is rotatably connected to the surface of the connecting bolt (14).

6. The crane telescopic boom according to claim 5, characterized in that, The top end of the threaded rod (6) is fixedly connected to a rotating disk (15), the inner cavity of the outer sleeve (1) is slidably connected to a movable arm (16), and the surface of the concave support roller (11) is rotatably connected to the movable arm (16).

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