Double-rotation telescopic boom

Abstract

The utility model relates to the field of telescopic booms, in particular to a double-rotation telescopic boom which comprises a boom body, the boom body comprises a big arm rotation seat, a big arm, a small arm rotation seat and a small arm, the big arm is connected with a big arm lifting oil cylinder, the small arm is connected with a small arm lifting oil cylinder, the small arm is connected with a rotation speed reducer, and the rotation speed reducer is connected with the small arm rotation seat. An oil cylinder pin shaft is connected between the arm support body and the large arm lifting oil cylinder, the small arm comprises a small arm outer sleeve and a small arm inner sleeve, a sliding block frame is arranged between the small arm outer sleeve and the small arm inner sleeve, and the small arm is connected with a telescopic oil cylinder. All the joints move flexibly, the small arm can rotate by 360 degrees, the space can be greatly saved when the trolley is folded, the working range between the small arm and the large arm is minus 70 degrees to 10 degrees, and the two-step construction working condition is met.

Description

Technical Field

[0001] The utility model relates to a double-rotation telescopic boom, in particular to a double-rotation telescopic boom applied in the field of telescopic booms. Background Art

[0002] The telescopic boom is an important structure of lifting machinery, which is used to change the length of the boom to obtain the required height. The telescopic mechanism of the crane includes a boom telescopic mechanism and a leg retracting and extending mechanism. The function of the boom telescopic mechanism is to change the length of the boom to obtain the required amplitude and lifting height to meet the operating requirements. The existing telescopic boom needs to be used together with the vehicle body.

[0003] In order to solve the problem that the existing telescopic boom needs to be used in conjunction with a vehicle body, the double-rotating telescopic boom on the market adopts a design of being assembled on the corresponding engineering vehicle body and engineering ship body, and has a certain market share.

[0004] However, the existing ordinary boom body has the disadvantage of limited working range, is not adaptable to most road and railway tunnels, and the movements between the joints are not flexible enough. The space requirement when retracting the car is high. Therefore, it is necessary to design a more practical double-rotating telescopic boom to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that the existing ordinary boom body has the disadvantage of limited working range, is not adaptable to most road and railway tunnels, and the movements between the joints are not flexible enough, and the space requirement is high when retracting the car.

[0006] To solve the above problems, the utility model provides a double-rotating telescopic boom, including a boom body, the boom body including a boom swivel seat, a boom, an arm swivel seat, and an arm, the boom is connected to a boom lifting cylinder, the arm is connected to an arm lifting cylinder, the arm is connected to a swivel reducer, a cylinder pin is connected between the boom body and the boom lifting cylinder, the arm includes an arm outer sleeve and an arm inner sleeve, a slider frame is arranged between the arm outer sleeve and the arm inner sleeve, and the arm is connected to a telescopic cylinder.

[0007] In the above-mentioned double-rotating telescopic boom, the boom body in this scheme has the advantage of a large working range, is suitable for most road-rail tunnels, and the joints are flexible. The forearm can rotate 360 ​​degrees, which can greatly save space when retracting the car. The working range between the forearm and the boom is negative seventy to ten degrees, which meets the two-step construction conditions.

[0008] As a further improvement of the present application, the pitch angle of the upper arm is negative fifteen to sixty degrees, and the pitch angle of the lower arm is negative seventy to ten degrees.

[0009] As a further improvement of the present application, the rotation angle of the forearm is from zero to three hundred and sixty degrees, and the telescopic path of the forearm is from zero millimeter to two thousand millimeters.

[0010] As a further improvement of the present application, the rotary reducer is provided with dual motors.

[0011] As another improvement of the present application, both the boom lifting cylinder and the arm lifting cylinder are double cylinders.

[0012] As another improved supplement of the present application, the cylinder pin includes a pin and a sleeve, and the contact surface between the pin and the sleeve is a conical surface.

[0013] As another improved supplement of the present application, an adjusting bolt is arranged on the left side of the cylinder pin shaft, and an elastic retaining ring for the shaft is arranged on the right side of the cylinder pin shaft.

[0014] In summary, the boom body in this solution has the advantage of a large working range and is suitable for most road-rail tunnels. The joints are flexible and the forearm can rotate 360 ​​degrees, which can greatly save space when retracting the car. The working range between the forearm and the boom is negative seventy to ten degrees, which meets the two-step construction conditions. The boom lifting cylinder and the forearm lifting cylinder are both double cylinders, which have smoother movements and greater thrust. The slewing reducer is driven by dual motors, which has a greater output torque and smoother operation. It also has a self-locking function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the boom structure of the first embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the forearm structure of the first embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the cylinder pin structure of the second embodiment of the present application;

[0018] Figure 4 This is a diagram of the first embodiment of the present application with the arm pitching at minus 15 degrees;

[0019] Figure 5 This is a diagram of the forearm pitching negative seventy degrees in the first embodiment of the present application;

[0020] Figure 6 This is a state diagram of the forearm rotating from 0 to 360 degrees in the first embodiment of the present application;

[0021] Figure 7 This is a diagram of the first state of the arm being extended from zero millimeter to two thousand millimeters in this application.

[0022] Description of the numbers in the figure:

[0023] 10. Boom swivel seat; 20. Boom lifting cylinder; 30. Boom; 40. Cylinder pin; 41. Pin; 42. Bushing; 43. Elastic retaining ring for shaft; 44. Adjusting bolt; 50. Forearm lifting cylinder; 60. Forearm swivel seat; 70. Rotary reducer; 80. Forearm; 81. Forearm outer sleeve; 82. Forearm inner sleeve; 83. Slider frame; 84. Telescopic cylinder. DETAILED DESCRIPTION

[0024] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0025] The first implementation method:

[0026] Figure 1-3 It is shown that the arm body includes a boom swivel seat 10, a boom 30, an arm swivel seat 60, and an arm 80. The boom 30 is connected to the boom lifting cylinder 20, the arm 80 is connected to the arm lifting cylinder 50, the arm 80 is connected to a swivel reducer 70, a cylinder pin 40 is connected between the arm body and the boom lifting cylinder 20, the arm 80 includes an arm outer sleeve 81 and an arm inner sleeve 82, a slider frame 83 is arranged between the arm outer sleeve 81 and the arm inner sleeve 82, and the arm 80 is connected to a telescopic cylinder 84.

[0027] Figure 1 , Figure 4-7 It is shown that the pitch angle of the boom 30 is negative fifteen to sixty degrees, the pitch angle of the arm 80 is negative seventy to ten degrees, the rotation angle of the arm 80 is zero to three hundred and sixty degrees, the telescopic path of the arm 80 is zero millimeter to two thousand millimeters, the rotary reducer 70 is provided with dual motors, and the boom lifting cylinder 20 and the arm lifting cylinder 50 are both double cylinders.

[0028] Figure 1-3It is shown that the arm body in this scheme has the advantage of a large working range, is suitable for most road-rail tunnels, and the various joints are flexible. The forearm 80 can rotate 360 ​​degrees, which can greatly save space when the car is retracted. The working range between the forearm 80 and the boom 30 is negative 70 to 10 degrees, which meets the two-step construction conditions. The arm is mainly composed of a boom swivel seat 10, a boom 30, a forearm swivel seat 60, and a forearm 80. The pitching action of the boom 30 is controlled by the boom lifting cylinder 20, and the pitching action of the forearm 80 is controlled by the forearm lifting cylinder 50. The rotation of 80 is controlled by the rotation reducer 70, and the cylinder and the arm are connected by the cylinder pin 40. The forearm 80 is mainly composed of a forearm outer sleeve 81 and a forearm inner sleeve 82. The slider frame 83 is between the forearm outer sleeve 81 and the forearm inner sleeve 82, which plays the role of wear resistance and gap adjustment. The extension and retraction of the forearm is controlled by the telescopic cylinder 84. The boom lifting cylinder 20 and the forearm lifting cylinder 50 are both double cylinders, which have smoother movement and greater thrust. The rotation reducer 70 is driven by dual motors, with greater output torque and smoother operation. It also has a self-locking function.

[0029] The second implementation method:

[0030] Figure 3 It is shown that the cylinder pin 40 includes a pin 41 and a sleeve 42. The contact surface between the pin 41 and the sleeve 42 is a conical surface. An adjusting bolt 44 is arranged on the left side of the cylinder pin 40, and an elastic retaining ring 43 for the shaft is arranged on the right side of the cylinder pin 40. The cylinder pin 40 is mainly composed of the pin 41 and the sleeve 42. The contact surface between the pin 41 and the sleeve 42 is a conical surface with a certain angle. When the adjusting bolt 44 is tightened, the pin 41 and the sleeve 42 move relative to each other along the conical surface, thereby increasing the outer diameter of the sleeve 42, eliminating the gap between the sleeve 42 and the outer wall, and reducing the shaking of the entire arm.

[0031] In view of current practical needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A double-rotating telescopic boom, characterized in that: The invention comprises a boom body, wherein the boom body comprises a boom swivel seat (10), a boom (30), a forearm swivel seat (60), and a forearm (80); the boom (30) is connected to a boom lifting cylinder (20); the forearm (80) is connected to a forearm lifting cylinder (50); the forearm (80) is connected to a swivel reducer (70); a cylinder pin shaft (40) is connected between the boom body and the boom lifting cylinder (20); the forearm (80) comprises a forearm outer sleeve (81) and a forearm inner sleeve (82); a slider frame (83) is provided between the forearm outer sleeve (81) and the forearm inner sleeve (82); and the forearm (80) is connected to a telescopic cylinder (84).

2. The double-rotating telescopic boom according to claim 1, characterized in that: The pitch angle of the upper arm (30) is between negative fifteen and sixty degrees, and the pitch angle of the lower arm (80) is between negative seventy and ten degrees.

3. The double-rotating telescopic boom according to claim 1, characterized in that: The rotation angle of the small arm (80) is from 0 degrees to 360 degrees, and the telescopic path of the small arm (80) is from 0 millimeters to 2,000 millimeters.

4. The double-rotating telescopic boom according to claim 1, characterized in that: The rotary reducer (70) is provided with dual motors.

5. The double-rotating telescopic boom according to claim 1, characterized in that: The upper arm lifting oil cylinder (20) and the lower arm lifting oil cylinder (50) are both double oil cylinders.

6. The double-rotating telescopic boom according to claim 1, characterized in that: The oil cylinder pin shaft (40) comprises a pin shaft (41) and a shaft sleeve (42), and the contact surface between the pin shaft (41) and the shaft sleeve (42) is a conical surface.

7. The double-rotating telescopic boom according to claim 1, characterized in that: An adjusting bolt (44) is provided on the left side of the oil cylinder pin shaft (40), and an elastic retaining ring (43) for a shaft is provided on the right side of the oil cylinder pin shaft (40).

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