Telescopic truss boom joint interlocking device and crane

Abstract

The application discloses a telescopic truss arm inter-arm segment self-locking device and a crane, and belongs to the technical field of cranes. The application discloses a telescopic truss arm inter-arm segment self-locking device and a crane, and belongs to the technical field of cranes. The application discards the inter-arm segment locking mode of pin shaft locking, avoids the operation of inserting and pulling out the pin, and automatically realizes locking when the inner arm segment moves to the required position, thereby transmitting the axial force and realizing the load bearing function of the truss arm, and solving the problems of high positioning accuracy requirement and installation difficulty of the pin shaft locking of the current telescopic truss arm inter-arm segment locking.

Description

Technical Field

[0001] This invention relates to a telescopic truss boom segment self-locking device and a crane, belonging to the field of crane technology. Background Technology

[0002] Compared to box booms, truss booms offer superior two-way stability, are lighter, and have enhanced boom performance, making them widely used in the crane industry. Currently, telescopic truss booms used in cranes typically consist of multiple sequentially nested truss boom sections, each including a chord and web members. Once all truss boom sections have extended or retracted to their designated positions, adjacent sections need to be locked to maintain the current configuration for crane lifting operations.

[0003] The locking of telescopic truss boom sections is generally achieved by using pin locking. However, due to boom deformation and assembly errors, the insertion and removal of the pins are extremely difficult. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a telescopic truss boom segment self-locking device and crane to solve the problems of high positioning accuracy requirements and difficult installation caused by the use of pin locking for existing telescopic truss boom segment locking.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following solution:

[0006] The present invention provides a telescopic truss boom segment self-locking device and a crane, including slides symmetrically arranged on the side of the outer boom segment and a telescopic mechanism installed at the bottom of the inner boom segment;

[0007] The slide includes a first slide and a second slide. The first slide is located outside the second slide. A slider is slidably connected in the first slide. The slider protrudes from the outside of the second slide and is provided with a first inclined surface and a second inclined surface in sequence. The inclination angle of the second inclined surface is greater than that of the first inclined surface.

[0008] The telescopic mechanism includes a pair of top blocks symmetrically rotatably connected to both ends of the bottom of the inner arm section, with the two top blocks repelling each other and abutting against the slide or slider.

[0009] Preferably, the slide rails and telescopic mechanisms are provided in several groups, with each group of slide rails and telescopic mechanisms being matched with each other.

[0010] Preferably, the second slide rail includes a slide plate disposed inside the first slide rail and a straight slide rail disposed at a distance from the first slide rail on the side of the outer arm segment, with the slider slidably connected between the first slide rail and the slide plate.

[0011] Preferably, it also includes a spring, which is disposed between the two top blocks, with both ends of the spring rotatably connected to the two top blocks respectively, and the spring is in a compressed state.

[0012] Preferably, the rotatable connection between the top block and the spring is made by a pin.

[0013] Preferably, a transition plane is provided between the first inclined plane and the second inclined plane, and the cross-section of the top block is elliptical.

[0014] The present invention also provides a crane, the crane including the above-described telescopic truss boom segment self-locking device.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention abandons the pin-locking method between boom sections, avoids the operation of inserting and pulling pins, and when the inner boom section moves to the required position for operation, it can automatically lock without additional auxiliary power and detection devices, thereby transmitting axial force and realizing the load-bearing function of the truss boom. It solves the problems of high positioning accuracy requirements and difficult installation of the current telescopic truss boom inter-segment locking which uses pin-locking. Attached Figure Description

[0016] Figure 1 This is a two-dimensional structural schematic diagram of a telescopic truss boom inter-segment self-locking device provided in an embodiment of the present invention;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of a telescopic truss boom inter-segment self-locking device provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the first slide and slider in a telescopic truss arm inter-segment self-locking device provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the first slide rail and the sliding plate in a telescopic truss arm inter-segment self-locking device provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the slider in a telescopic truss arm inter-segment self-locking device provided in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the arm extension and locking process of a telescopic truss arm inter-arm self-locking device provided in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the arm retraction process of a telescopic truss arm segment self-locking device provided in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the contact between the slider and the top block in the locked state of a telescopic truss arm inter-segment self-locking device provided in an embodiment of the present invention.

[0024] Figure 9 This is a schematic diagram of the contact between the slider and the slide plate in the telescopic state of a telescopic truss arm segment self-locking device provided in an embodiment of the present invention.

[0025] In the diagram: 1. Inner arm section; 2. Outer arm section; 3. Slider; 4. Top block; 5. Spring; 6. First slide rail; 7. Straight slide rail; 8. Slide plate; 9. First inclined plane; 10. Transition plane; 11. Second inclined plane; 12. End limiting groove. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Example 1:

[0030] like Figures 1-9 As shown, this embodiment provides a telescopic truss boom inter-segment self-locking device, including slides symmetrically arranged on the side of the outer boom segment 2 and a telescopic mechanism installed at the bottom of the inner boom segment 1. Several sets of slides and telescopic mechanisms are provided, and each set of slides and telescopic mechanisms is matched with each other to realize the telescopic extension and automatic locking between the inner and outer boom segments, thereby transmitting axial force and realizing the load-bearing function of the truss boom.

[0031] Specifically, the slide includes a first slide 6 and a second slide, with the first slide 6 located outside the second slide. The telescopic mechanism includes a pair of top blocks 4 symmetrically rotatably connected to both ends of the bottom of the inner arm section 1.

[0032] A slider 3 is slidably connected in the first slide rail. The second slide rail includes a slide plate 8 located inside the first slide rail 6 and a straight slide rail 7 spaced apart from the first slide rail 6 on the side of the outer arm section. The slide plate 8 serves two purposes: firstly, it prevents the slider 3 in the first slide rail 6 from falling out; secondly, it prevents the inner arm section 1 from retracting and the top block 4 from sliding down to the first slide rail 6 and becoming self-locked, thus preventing further retraction. It also works with the straight slide rail 7 to guide the top block 4's sliding within the slide rail. The slider 3 protrudes from the outside of the slide plate 8 and has a first inclined surface 9 and a second inclined surface 11 arranged sequentially. The inclination angle of the second inclined surface 11 is greater than that of the first inclined surface 9, ensuring that after the inner arm section 1 retracts and the top block 4 passes through the slide plate 8 and slider 3, it slides into the next straight slide rail 7, preventing self-locking and preventing retraction. A spring 5 connects the two top blocks 4, with both ends of the spring 5 rotatably connected to the two top blocks 4. The spring 5 is always compressed, causing the two top blocks 4 to repel each other and abut against the slide rail or slider 3.

[0033] Furthermore, the rotating connection between the top block 4 and the spring 5 is made of a pin; a transition plane 10 is provided between the first inclined surface 9 and the second inclined surface 11, and the cross-section of the top block 4 is elliptical, making the extension, retraction and locking process of the inner and outer arm sections smoother and more efficient. An end limiting groove 12 is provided at the bottom of the slide, so that the top block 4 stops at the end of the slide when the inner arm section 1 retracts into the outer arm section 2, preventing the inner arm section 1 from falling off or sliding out of the outer arm section 2. The structure is reasonably and compactly arranged.

[0034] Working principle:

[0035] Boom extension and self-locking: The inner boom 1 extends from the outer boom 2. The top block 4 continuously slides over the slider 3 and the second slide in the first slide 6, which are spaced apart. When the inner boom 1 moves to the required position, the top block 4 and the second inclined surface 11 of the slider 3 abut against each other, and gradually lifts and slides the slider 3 in the first slide 6 to the upper part of the first slide 6. Under the elastic action of the spring 5 in the compressed state, the top block 4 engages in the first slide 6, realizing self-locking. This cycle continues until all boom sections of the telescopic truss boom are fully extended, thereby transmitting axial force and realizing the load-bearing function of the truss boom.

[0036] Arm retraction: The inner arm segment 1 continues to extend outward toward the outer arm segment 2, and the top block 4 slides sequentially over the second inclined surface 11, the transition plane 10, and the first inclined surface 9 of the slider 3 located above the first slide rail 6 to the straight slide rail 7 or the slide plate 8. At this time, the slider 3 slides down to the bottom of the first slide rail 6; the inner arm segment 1 retracts inward toward the outer arm segment 2, and the top block 4 starts from the straight slide rail 7 or the slide plate 8, continuously sliding over the spaced second slide rails and the slider 3. When the top block 4 slides onto the slider 3, it successively abuts against the first inclined surface 9 and the transition plane 10. Since the inclination angle of the second inclined surface 11 on the slider 3 is greater than that of the first inclined surface 9, during the sliding contact process between the top block 4 and the slider 3 from top to bottom, the contact and sliding distance between the top block 4 and the second inclined surface 11 is much smaller than the contact and sliding distance between the top block 4 and the first inclined surface 9. At this time, the slider 3 is at the bottom of the first slide rail 6, and the top block 4 will smoothly slide from the transition plane 10 and the second inclined surface 11 to the next straight slide rail 7 without self-locking. This cycle continues until all sections of the telescopic truss arm are retracted.

[0037] Example 2:

[0038] This embodiment provides a crane, including the telescopic truss boom segment self-locking device described in Embodiment 1 above. It consists of slides symmetrically arranged on the side of the outer boom segment 2 and a telescopic mechanism installed at the bottom of the inner boom segment 1. Several sets of slides and telescopic mechanisms are provided, and each set of slides and telescopic mechanisms is matched with each other to realize the telescopic extension and automatic locking between the inner and outer boom segments, thereby transmitting axial force and realizing the load-bearing function of the truss boom.

[0039] In summary, this invention eliminates the pin-locking method for inter-arm sections, avoiding the need for inserting and pulling pins. When the inner arm section moves to the required position, it can automatically lock without additional auxiliary power or detection devices, thereby transmitting axial force and realizing the load-bearing function of the truss arm. This solves the problems of high positioning accuracy and difficult installation associated with the current pin-locking method for telescopic truss arms.

[0040] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A telescopic truss boom segment self-locking device, characterized in that, It includes slides symmetrically arranged on the side of the outer boom section and a telescopic mechanism installed at the bottom of the inner boom section; the slides include a first slide and a second slide, the first slide is located outside the second slide, a slider is slidably connected in the first slide, the slider protrudes out of the outside of the second slide and is provided with a first inclined surface and a second inclined surface in sequence, the inclination angle of the second inclined surface is greater than the inclination angle of the first inclined surface; The telescopic mechanism includes a pair of top blocks symmetrically rotatably connected to both ends of the bottom of the inner arm section, with the two top blocks repelling each other and abutting against the slide or slider; It also includes a spring, which is disposed between the two top blocks, with both ends of the spring rotatably connected to the two top blocks respectively, and the spring is in a compressed state; The second slide includes a slide plate disposed inside the first slide and a straight slide plate disposed at intervals on the side of the outer arm section, with the slider slidably connected between the first slide and the slide plate; The rotating connection between the top block and the spring is made by a pin. A transition plane is provided between the first inclined plane and the second inclined plane, and the cross-section of the top block is elliptical.

2. The telescopic truss boom segment self-locking device according to claim 1, characterized in that, The slide rails and telescopic mechanisms are provided in several sets, and each set of slide rails and telescopic mechanisms is matched with each other.

3. A crane, characterized in that, The crane includes the telescopic truss boom segment self-locking device as described in any one of claims 1 to 2.

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