Adjustable backward inclination prevention in-place device

Abstract

The utility model discloses an adjustable anti-back-tipping in-place device, which comprises an anti-back-tipping rod, the anti-back-tipping rod is arranged between a main arm head and an auxiliary arm bottom section arm, one end of the anti-back-tipping rod is hinged with the auxiliary arm bottom section arm, the other end of the anti-back-tipping rod is a free end, the main arm head is connected with a lug plate group, and a limiting mechanism is arranged on the lug plate group. According to the utility model, a main arm head inclined plane fixed slideway is canceled and is changed into an assembled in-position mechanism capable of adjusting the left and right positions, the end part type and the working state of the anti-back-tilting structure are changed without accurately considering the span size matching of an anti-back-tilting rod and the main arm slideway, a certain offset is reserved on the in-position mechanism, and meanwhile, the in-position mechanism can also be adjusted left and right; the cantilever crane is prevented from tilting backwards in the limit state, mechanical jacking limiting is achieved, the fault tolerance of tilting prevention to the machining precision and the assembling precision of the cantilever crane is improved, the debugging efficiency and the reliability of tilting prevention work are improved, and the limitation that tilting prevention cannot smoothly enter a sliding way into a groove due to the machining precision of a tilting prevention installation lug plate can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of crane hoisting, in particular to an adjustable anti-tipping and positioning device. Background Technique

[0002] The truss boom (jib) is a truss structure that lifts heavy objects to a certain height and amplitude. It includes a main boom and a sub-boom. The main boom and the sub-boom are movably arranged. In order to improve the stability during the adjustment process, an anti-tipping and positioning mechanism is usually also provided.

[0003] The anti-tipping of the crawler crane sub-boom is a safety guarantee measure to prevent the sub-boom from tipping backward. The commonly used sub-boom anti-tipping devices in the prior art mainly include sleeve type, hydraulic cylinder, weight type, etc. Since the anti-tipping is a device acting between two movable parts of the main boom and the sub-boom, the problem of the anti-tipping entering the slot has always been an important prerequisite for the safe operation of the anti-tipping. The smooth entry of the anti-tipping into the slot tests the machining accuracy and assembly accuracy of the main and sub-boom. Affected by the processing conditions and structural forms, the debugging work of the anti-tipping often requires a lot of time to manually prevent the anti-tipping angle adjustment problem to ensure its smooth entry into the slot, so that the anti-tipping can work properly.

[0004] In the prior art, whether the anti-tipping can smoothly enter the slideway and slot completely depends on the machining accuracy of the hinge ear connecting the anti-tipping on the bottom section of the sub-boom. And the size of the hinge ear is relatively small compared with the overall size of the anti-tipping, and the anti-tipping is easy to swing left and right, resulting in problems such as not being able to enter the slideway and slot. In addition, there may also be too large a deviation in the slideway, resulting in the anti-tipping mechanism being unable to correctly enter the slideway, which is easy to cause damage to the structural parts, and the friction between the anti-tipping structure and the slideway is large, which is easy to get stuck and cause damage to the structural parts.

[0005] The utility model aims at the deficiencies of the prior art and proposes an adjustable anti-tipping and positioning device. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an adjustable anti-tipping and positioning device aiming at the deficiencies of the above-mentioned prior art. Cancel the fixed slideway on the inclined plane of the main boom head, and change it to an assemblable positioning mechanism that can adjust the left and right positions. Change the structure type of the first end of the anti-tipping. When working, there is no need to precisely consider the dimension matching between the anti-tipping rod and the main boom slideway spacing. A certain offset is reserved on the positioning mechanism, and at the same time, the positioning mechanism can also be adjusted left and right. When the boom is in the limit state, the anti-tipping realizes mechanical dead-end limit, which can eliminate the limitation that the anti-tipping skew caused by the machining accuracy of the anti-tipping mounting ear plate cannot smoothly enter the slideway and slot, and solve the problems proposed in the background technique.

[0007] The technical solution adopted by the utility model is:

[0008] An adjustable anti-tipping in-place device includes an anti-tipping rod. The anti-tipping rod is arranged between the head of the main boom and the bottom section of the auxiliary boom. One end of the anti-tipping rod is hinged to the bottom section of the auxiliary boom, and the other end is set as a free end. An ear plate group is connected to the head of the main boom, and a limiting mechanism is installed on the ear plate group. The limiting mechanism adjusts its left and right positions on the ear plate group through adjusting gaskets. The free end of the anti-tipping rod cooperates with the limiting mechanism to limit the anti-tipping rod.

[0009] The limiting mechanism includes a slide plate and a bent plate. The slide plate and the bent plates on both sides form a limiting area, and the upper part of the bent plate is arc-shaped. An arc plate is integrally arranged at the end of the slide plate.

[0010] Preferably, the ear plate group includes a first ear plate and two second ear plates. The first ear plate and the two second ear plates are distributed in an isosceles triangle. An ear plate seat matching the first ear plate and the second ear plates is arranged at the bottom of the slide plate. A first pin shaft passes through between the ear plate seat and the first ear plate or the second ear plate, and the adjusting gasket is sleeved outside the first pin shaft.

[0011] Preferably, small long rib plates are welded on the upper surface of the slide plate, and the small long rib plates are slidably connected to the end of the anti-tipping rod.

[0012] Preferably, the end of the anti-tipping rod matching the limiting area is set as a wedge shape.

[0013] Preferably, a third ear plate is connected to the bottom section of the auxiliary boom, and a connecting seat is hinged on the third ear plate. The anti-tipping rod is fixedly connected to the connecting seat.

[0014] Preferably, a second pin shaft passes through between the third ear plate and the connecting seat. A support frame is connected to the bottom section of the auxiliary boom, and the connecting seat moves inside the support frame.

[0015] Preferably, pin holes are opened outside the ends of the first pin shaft and the second pin shaft, and clips are inserted into the pin holes.

[0016] Preferably, a bracket is fixedly connected to the bottom section of the auxiliary boom, and pull plates are arranged on both the front and rear sides of the bracket.

[0017] The utility model has the following beneficial effects:

[0018] 1. By canceling the fixed slideway on the inclined plane of the main boom head and changing it to an installable positioning mechanism that can adjust the left and right positions, and changing the structural type of the first end part to prevent backward tipping, there is no need to precisely consider the dimension matching between the anti-backward tipping rod and the main boom slideway pitch during the working state. A certain offset is reserved on the positioning mechanism, and the positioning mechanism can also be adjusted left and right. When the boom is in the extreme state, mechanical dead-end limiting is achieved for anti-backward tipping, thereby improving the tolerance of anti-backward tipping to the processing accuracy and assembly accuracy of the boom, enhancing the debugging efficiency and the reliability of anti-backward tipping work, and being able to eliminate the limitation that the anti-backward tipping skew caused by the processing accuracy of the anti-backward tipping mounting ear plate cannot smoothly enter the slideway and slot. Brief Description of the Drawings

[0019] Figure 1 It is a three-dimensional view of the installation structure of the main components of the boom;

[0020] Figure 2 It is a diagram of the initial installation state of the anti-backward tipping positioning device provided by the present utility model;

[0021] Figure 3 It is a diagram of the state after the anti-backward tipping positioning device provided by the present utility model is flipped;

[0022] Figure 4 It is a structural distribution diagram of the ear plate group in the present utility model;

[0023] Figure 5 It is a three-dimensional view of the limiting mechanism in the present utility model;

[0024] Figure 6 It is an exploded view of the limiting mechanism in the present utility model.

[0025] Among them:

[0026] Main boom head - 1; Sub-boom bottom section - 2; Anti-backward tipping rod - 3; Bracket - 4;

[0027] Ear plate group - 5; First ear plate - 51; Second ear plate - 52; Ear plate seat - 53;

[0028] Limiting mechanism - 6; Arc plate - 61; First pin shaft - 62; Clip - 63; Slideway plate - 64; Long rib plate - 65; Bent plate - 66;

[0029] Adjusting gasket - 7; Support frame - 8; Third ear plate - 9; Connecting seat - 10; Second pin shaft - 11. Detailed Embodiment

[0030] The present utility model will be further described in detail below in conjunction with the drawings and specific preferred embodiments.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "left side", "right side", "upper part", "lower part", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present utility model. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example and do not limit the protection scope of the present utility model.

[0032] As Figure 1-6 shown, an adjustable anti-rearward tilting positioning device includes an anti-rearward tilting rod 3. The anti-rearward tilting rod 3 is arranged between the main boom head 1 and the sub-boom bottom section arm 2. One end of the anti-rearward tilting rod 3 is hinged to the sub-boom bottom section arm 2, and the other end is set as a free end. An ear plate group 5 is connected to the main boom head 1, and a limiting mechanism 6 is installed on the ear plate group 5. The limiting mechanism 6 adjusts its left and right positions on the ear plate group 5 through adjusting gaskets 7. The free end of the anti-rearward tilting rod 3 cooperates with the limiting mechanism 6 to limit the anti-rearward tilting rod 3.

[0033] The limiting mechanism 6 includes a slideway plate 64 and a bent plate 66. The slideway plate 64 and the bent plates 66 on both sides form a limiting area, and the upper part of the bent plate 66 is arc-shaped. If the skew amount of the anti-rearward tilting rod 3 exceeds the reserved value and it falls on the bent plate 66, it can slide down along the arc surface into the limiting area. If the anti-rearward tilting rod 3 is severely skewed and the first end of the anti-rearward tilting rod 3 still cannot fall into the limiting area after flipping, then by adjusting the left and right positions of the limiting mechanism 6, it can be made to satisfy that the anti-rearward tilting rod 3 falls on it after flipping. An arc plate 61 is integrally provided at the end of the slideway plate 64. When the sub-boom bottom section arm 2 is in the normal working state, the first end of the anti-rearward tilting rod 3 slides in the limiting area formed by the bent plate 66 and the slideway plate 64. When the anti-rearward tilting rod 3 is at the limit position, the first end of the anti-rearward tilting rod 3 slides to the slot hole of the arc plate 61, playing a role in preventing the sub-boom bottom section arm 2 from tilting backward.

[0034] Specifically, the ear plate group 5 includes a first ear plate 51 and two second ear plates 52. The first ear plate 51 and the two second ear plates 52 are distributed in an isosceles triangle. An ear plate seat 53 matching the first ear plate 51 and the second ear plates 52 is provided at the bottom of the slideway plate 64. A first pin shaft 62 penetrates between the ear plate seat 53 and the first ear plate 51 or the second ear plates 52, and the adjusting gasket 7 is sleeved outside the first pin shaft 62. The number of adjusting gaskets 7 is set to be multiple, and the adjusting gaskets 7 are set as standard parts. The thickness of the adjusting gasket 7 is set as a unit dimension. By controlling the number of adjusting gaskets 7 between the first ear plate 51 and the second ear plates 52 and the ear plate seat 53 according to the actual situation, the left and right position adjustment of the limiting mechanism 6 is realized.

[0035] Specifically, to facilitate the smooth sliding of the end of the anti-tipping bar 3 on the limiting mechanism 6, a small long rib plate 65 is welded on the upper surface of the slideway plate 64, and the small long rib plate 65 is slidably connected to the end of the anti-tipping bar 3, reducing the friction between structural components, facilitating sliding, and increasing the safety and reliability of the anti-tipping bar 3.

[0036] Specifically, the end of the anti-tipping bar 3 matching the limiting area is set to be wedge-shaped, and the wedge-shaped corners are set to be arc-shaped, so that the anti-tipping bar 3 is in linear contact with the small long rib plate 65, and the contact area is small. The surfaces of the anti-tipping bar 3 and the small long rib plate 65 are smooth, reducing the frictional loss between structures.

[0037] Specifically, a third ear plate 9 is connected to the bottom section arm 2 of the auxiliary boom, and a connecting seat 10 is hinged on the third ear plate 9. The anti-tipping bar 3 is fixedly connected to the connecting seat 10.

[0038] Specifically, a second pin shaft 11 passes through between the third ear plate 9 and the connecting seat 10. A support frame 8 is connected to the bottom section arm 2 of the auxiliary boom, and the connecting seat 10 moves inside the support frame 8.

[0039] Specifically, pin holes are provided on the outer sides of the ends of the first pin shaft 62 and the second pin shaft 11, and clips 63 are inserted into the pin holes.

[0040] Specifically, a bracket 4 is fixedly connected to the bottom section arm 2 of the auxiliary boom, and pull plates (not shown in the figure) are provided on both the front and rear sides of the bracket 4, jointly forming a set of working conditions of the bottom section arm 2 of the auxiliary boom; when the bottom section arm 2 of the auxiliary boom has a tendency to tip backward during the working state, as the bottom section arm 2 of the auxiliary boom rotates counterclockwise, the end of the anti-tipping bar 3 finally abuts against the groove of the arc plate 61 on the main boom head 1, realizing mechanical limit and preventing the bottom section arm 2 of the auxiliary boom from tipping further backward.

[0041] The working principle of the present utility model: Due to the action of gravity, in the initial state, the anti-tipping bar 3 relies on the heavy end of the anti-tipping bar 3 to fall on the bottom section arm 2 of the auxiliary boom. The anti-tipping bar 3 is connected to the ear plate 9 on the bottom section arm 2 of the auxiliary boom through a pin shaft 8. As the main boom head 1 and the bottom section arm 2 of the auxiliary boom move to a certain angle, the anti-tipping bar 3 rotates around the second pin shaft 11 with the change of the center of gravity. One end of the anti-tipping bar 3 falls into the limiting mechanism 6 on the main boom head 1. Since the upper part of the bending plate 66 is arc-shaped, the anti-tipping bar 3 falls into the limiting area composed of the bending plate 66 and the slideway plate 64 after flipping; to facilitate the smooth sliding of the first end of the anti-tipping bar 3 on the limiting mechanism 6, a small long rib plate 65 is welded on the slideway plate 64, reducing the friction between structural components, facilitating sliding, and increasing the safety and reliability of the anti-tipping bar 3;

[0042] When the skew amount of the anti-tipping bar 3 exceeds the reserved value, it falls on the bending plate 66 and can slide down along the arc surface into the limit area; if the anti-tipping bar 3 is severely skewed and the first end of the anti-tipping bar 3 still cannot fall into the limit area after flipping, the left and right positions of the limit mechanism 6 are adjusted to make it satisfy that the anti-tipping bar 3 falls on it after flipping; when the bottom section arm 2 of the auxiliary boom is in the normal working state, the first end of the anti-tipping bar 3 slides within the limit area formed by the bending plate 66 and the slide plate 64. When the anti-tipping bar 3 is at the limit position, the first end of the anti-tipping bar 3 slides to the slot of the arc plate 61, playing a role in preventing the bottom section arm 2 of the auxiliary boom from tipping backward.

[0043] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. An adjustable anti-rear-tipping in-place device, characterized in that: It includes an anti-tipping bar (3), the anti-tipping bar (3) is arranged between the main boom head (1) and the bottom section of the auxiliary boom (2), one end of the anti-tipping bar (3) is hinged to the bottom section of the auxiliary boom (2), and the other end is set as a free end. A connecting ear plate group (5) is connected to the main boom head (1), and a limiting mechanism (6) is installed on the ear plate group (5). The limiting mechanism (6) adjusts its left and right positions on the ear plate group (5) through adjusting gaskets (7). The free end of the anti-tipping bar (3) cooperates with the limiting mechanism (6) to limit the anti-tipping bar (3). The limiting mechanism (6) includes a slide plate (64) and a bent plate (66). The slide plate (64) and the bent plates (66) on both sides form a limiting area, and the upper part of the bent plate (66) is arc-shaped. An arc plate (61) is integrally arranged at the end of the slide plate (64).

2. The adjustable anti-rearward tilting in-place device according to claim 1, wherein: The ear plate group (5) includes a first ear plate (51) and two second ear plates (52). The first ear plate (51) and the two second ear plates (52) are distributed in an isosceles triangle. An ear plate seat (53) matching the first ear plate (51) and the second ear plates (52) is arranged at the bottom of the slide plate (64). A first pin shaft (62) penetrates between the ear plate seat (53) and the first ear plate (51) or the second ear plates (52), and the adjusting gasket (7) is sleeved outside the first pin shaft (62).

3. The adjustable anti-tipping in-place device according to claim 1, wherein: Small long rib plates (65) are welded on the upper surface of the slide plate (64), and the small long rib plates (65) are slidably connected to the end of the anti-tipping bar (3).

4. An adjustable anti-tipping in-place device according to claim 1, characterized in that: The end of the anti-tipping bar (3) matching the limiting area is wedge-shaped.

5. An adjustable anti-tipping in-place device according to claim 2, characterized in that: A third ear plate (9) is connected to the bottom section of the auxiliary boom (2), and a connecting seat (10) is hinged to the third ear plate (9). The anti-tipping bar (3) is fixedly connected to the connecting seat (10).

6. An adjustable anti-tipping in-place device according to claim 5, characterized in that: A second pin shaft (11) penetrates between the third ear plate (9) and the connecting seat (10). A support frame (8) is connected to the bottom section of the auxiliary boom (2), and the connecting seat (10) moves inside the support frame (8).

7. An adjustable anti-rearward tilting positioning device according to claim 6, characterized in that: Pin holes are opened outside the ends of the first pin shaft (62) and the second pin shaft (11), and clips (63) are inserted into the pin holes.

8. An adjustable anti-tipping in-place device according to claim 1, characterized in that: A bracket (4) is fixedly connected to the bottom section of the auxiliary boom (2), and pull plates are arranged on both the front and rear sides of the bracket (4).

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