Crane fly jib support
By setting multiple mounting holes in the crane's jib bracket for connection, the problems of bracket interference and excessive width are solved, thereby improving the versatility and space utilization of the mid-bracket and reducing design and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-23
- Publication Date
- 2026-04-07
AI Technical Summary
Existing crane jib supports are prone to interference and excessive width issues during use, resulting in low reuse rates of the middle support, increased R&D costs, and hindering modular design.
Design a crane jib bracket. By setting multiple matching mounting holes between the first and second sections of the middle support, and using different combinations of mounting holes, three working states of the second section support can be achieved, avoiding interference and keeping the maximum width unchanged, thereby increasing space utilization.
It effectively avoids interference between the support and other components, improves the versatility and space utilization of the support, reduces costs, simplifies design workload, and enhances the applicability of modular design.
Smart Images
Figure CN224091521U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a crane auxiliary arm support and belongs to the technical field of engineering machinery. BACKGROUND
[0002] The crane auxiliary arm is a structural member used in special working conditions and designed to increase the lifting height and range of the crane, which is generally hung on the side of the main arm by the auxiliary arm support and rotates horizontally around the head of the main arm during use to complete the connection. The crane auxiliary arm plays an important role in extending the lifting height, expanding the working range and improving the working efficiency. The auxiliary arm support is a structure installed on one side of the main arm to support the auxiliary arm, which is generally composed of a front support (300), a middle support (400) and a rear support (500) (see Figure 3 ).
[0003] Before the crane works, the main arm needs to be turned from the front to the back, and the counterweight (see Figure 1 ) is installed through the counterweight support. During the process of connecting and recovering the auxiliary arm, the motion trajectory of the supporting roller is an arc, and the unfolded state of the middle support is designed to be a non-180° angle, which can reduce the width of the support surface and further reduce the weight of the middle support. The position farthest from the main arm in the middle support is the widest position on the vehicle (see Figure 4 the size W in the left figure), and after the auxiliary arm is switched to the non-working state (state III Figure 2 ), the middle support needs to be folded to reduce the overall width and ensure that it does not exceed the width. At the same time, it is also necessary to ensure that the middle support does not interfere with the main arm and other components after being folded. Some crane products are designed to be compact, and other components such as the counterweight support will be arranged in the swept area of the folded middle support. When the vehicle is switched to the front, the middle support will interfere with the counterweight support (see Figure 4 the left figure in the middle). In order to avoid interference, the folding angle of the middle support (i.e. Figure 4 ∠B1 >∠B) needs to be adjusted, but this brings the risk of exceeding the width (i.e. Figure 4 W1>W).
[0004] In addition, the middle support supporting roller (210) must be located on the outside of the center of gravity near the direction of the auxiliary arm head (see Figure 2 and Figure 3When the middle support (400) is moved in the front-rear direction, the length of the middle support needs to be considered, otherwise the sub-arm will contact the front support first when being retracted, which will make the retraction difficult. Meanwhile, if the middle support moves too much towards the head of the main arm, the support surface of the middle support needs to be widened according to the movement track to ensure the support of the support roller during the movement of the sub-arm, otherwise the sub-arm cannot be supported, which results in low utilization rate of the sub-arm for different products, increased research and development cost. When the width of the whole machine is limited, the middle support is rotated outward, which is too wide after rotation, or the rotation angle needs to be large, which limits the arrangement space below the middle support. When the middle support is rotated outward and is too wide, the middle support needs to be redesigned for the wide machine, which reduces the reuse rate of the middle support, increases the number of middle supports, is not conducive to modular design, and increases the maintenance cost. SUMMARY
[0005] The crane sub-arm support provided by the utility model can avoid interference and overwidth problems, has simple structure, low cost, good versatility, and is beneficial to design.
[0006] The utility model discloses a crane sub-arm support which can avoid interference and overwidth problems, has simple structure, low cost, good versatility, and is beneficial to design.
[0007] A crane sub-arm support comprises a front support, a middle support and a rear support installed on a main arm for supporting a sub-arm, the middle support comprises a one-section support and a two-section support, the one-section support is provided with a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole, the two-section support is provided with a fifth mounting hole and a sixth mounting hole, different mounting holes are connected through a hinge mechanism to realize three different mounting states of the two-section support.
[0008] State a: the first mounting hole and the second mounting hole on the one-section support are coaxially connected with the fifth mounting hole and the sixth mounting hole on the two-section support respectively.
[0009] State b: the second mounting hole and the third mounting hole on the one-section support are coaxially connected with the sixth mounting hole and the fifth mounting hole on the two-section support respectively.
[0010] State c: the third mounting hole and the fourth mounting hole on the one-section support are coaxially connected with the fifth mounting hole and the sixth mounting hole on the two-section support respectively.
[0011] The two-section support forms three different working states through the combination of the mounting holes, which meets the working requirements of the middle support.
[0012] Further, the hinge mechanism is a simple pin shaft hinge, which comprises a first pin shaft, a first washer and a first pin clamp.
[0013] Furthermore, the hinge mechanism is a spring pin hinge, comprising a second pin holder, a second pin shaft, a spring, a bushing, and a nut installed in sequence; the nut is screwed onto the second pin shaft, and the spring is fitted onto the second pin shaft.
[0014] Furthermore, a handle is also installed on the second pin via a second washer and a nut.
[0015] Furthermore, each mounting hole of the bracket section is either a pair of corresponding through holes or a U-shaped groove with a notch.
[0016] Furthermore, the distances between the second mounting hole, the fourth mounting hole, and the third mounting hole are equal, that is, the second mounting hole and the fourth mounting hole are on the same arc with the third mounting hole as the center.
[0017] Furthermore, several other mounting holes are provided on the same arc between the second mounting hole and the fourth mounting hole.
[0018] Furthermore, the second mounting hole and the fourth mounting hole are connected by an arc-shaped groove.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] This utility model sets multiple matching mounting holes between the first and second sections of the middle support frame. By using different combinations of mounting holes, multiple working states of the second section support frame can be achieved. This can effectively avoid interference between the support frame and other components such as counterweight supports. At the same time, it does not increase the maximum width, thus increasing the space utilization rate of the middle support frame accessories. The structure is simple and the cost is low. It is conducive to realizing the interchangeability of supports between different products and improving the generalization level of the middle support frame, reducing the task of designing new components due to changes in space layout requirements. Attached Figure Description
[0021] Figure 1 This is a schematic diagram showing the changes in the working state of a crane boom.
[0022] Figure 2 This is a schematic diagram showing the changes in various working states of the crane boom and jib.
[0023] Figure 3 This is a schematic diagram showing the switching of the working state of the crane's jib.
[0024] Figure 4 This is a schematic diagram of the operation of the existing jib support of the crane.
[0025] Figure 5 This is a schematic diagram of the middle support structure of a crane jib support according to the present invention.
[0026] Figure 6This is a schematic diagram of the working state of the middle support of a crane auxiliary boom support according to the present invention.
[0027] Figure 7 This is a schematic diagram of the mounting hole structure of the middle bracket of a crane auxiliary boom support according to the present invention.
[0028] Figure 8 This is a schematic diagram of the arc-shaped groove structure of the middle support of a crane auxiliary boom support according to the present invention.
[0029] in:
[0030] Main boom 100, auxiliary boom 200, front support 300, middle support 400, rear support 500, counterweight support 600;
[0031] A bracket section 410, a first mounting hole 411, a second mounting hole 412, a third mounting hole 413, a fourth mounting hole 414, a U-shaped groove 415, an arc-shaped groove 416, a second bracket section 420, a fifth mounting hole 421, a sixth mounting hole 422, a second pin 430, a second pin 440, a spring 450, a bushing 460, a nut 470, a handle 480, a second washer 490, a first pin 510, a first washer 520, and a first pin 530. Detailed Implementation Example 1
[0032] See Figures 5-6 The present invention relates to a crane jib support, comprising a front support 300, a middle support 400 and a rear support 500 mounted on the main boom 100 for supporting the jib 200; the middle support 400 comprises a first support section 410 and a second support section 420.
[0033] The first section of the bracket 410 is provided with a first mounting hole 411, a second mounting hole 412, a third mounting hole 413, and a fourth mounting hole 414, wherein the distance between the second mounting hole 412, the fourth mounting hole 414, and the third mounting hole 413 is equal, that is, the second mounting hole 412 and the fourth mounting hole 414 are on the same arc with the third mounting hole 413 as the center; the second section of the bracket 420 is provided with a fifth mounting hole 421 and a sixth mounting hole 422. The four mounting holes of the first section of the bracket 410, the first mounting hole 411, the second mounting hole 412, the third mounting hole 413, and the fourth mounting hole 414 are either two corresponding through holes or U-shaped grooves 415 with notches. Specifically, the upper part of the first mounting hole 411 and the third mounting hole 413 are both through holes, and the lower part is both a U-shaped groove 415; the upper and lower parts of the second mounting hole 412 and the fourth mounting hole 414 are both through holes.
[0034] The different mounting holes are connected by a hinge mechanism to achieve three different installation states of the two-section bracket 420. The hinge mechanism is a simple pin hinge, including a first pin 510, a first washer 520, and a first pin catch 530. The hinge mechanism can also be a spring pin hinge, including a second pin catch 430, a second pin 440, a spring 450, a bushing 460, and a nut 470 installed in sequence. The nut 470 is screwed onto the second pin 440, and the spring 450 is fitted onto the second pin 440. A handle 480 is also installed on the second pin 440 through a second washer 490 and a nut 470 for pulling the spring pin on the second pin 440, facilitating the pull-out unlocking operation.
[0035] The three specific working states of the two-section bracket 420 are as follows:
[0036] State a: The first mounting hole 411 and the second mounting hole 412 on the first section of the bracket 410 are coaxially connected to the fifth mounting hole 421 and the sixth mounting hole 422 on the second section of the bracket 420, respectively; in this state, the second section of the bracket 420 is in the unfolded state.
[0037] State b: The second mounting hole 412 and the third mounting hole 413 on the first section of the bracket 410 are coaxially connected to the sixth mounting hole 422 and the fifth mounting hole 421 on the second section of the bracket 420, respectively; in this state, the second section of the bracket 420 is in a folded state.
[0038] State c: The third mounting hole 413 and the fourth mounting hole 414 on the first section of the bracket 410 are coaxially connected to the fifth mounting hole 421 and the sixth mounting hole 422 on the second section of the bracket 420, respectively; in this state, the second section of the bracket 420 is in a double-folded state.
[0039] The two-section bracket 420 is connected by the above-mentioned mounting holes to form three different working states, which meet the working requirements of the middle bracket 400. The specific working principle is as follows:
[0040] The first folding operation: With the second-section bracket 420 in unfolded state a, pull the handle 480 to disengage the second pin from the first mounting hole 411. Utilizing the U-shaped notch in the U-groove 415, the hinge connection between the first mounting hole 411 and the fifth mounting hole 421 can be easily unlocked. Rotate the second-section bracket 420 around the axis of the second mounting hole 412, making the fifth mounting hole 421 of the second-section bracket 420 coaxial with the third mounting hole 413 of the first-section bracket 410. Insert the second pin 430, forming a hinge connection between the fifth mounting hole 421 and the third mounting hole 413, entering the first folding state b, completing the first rotation. After entering state b, if the boom is directly in front of the vehicle, interference will occur between the second-section bracket 420 of the auxiliary boom and the counterweight support 600. See [link / details]. Figure 6 ;
[0041] Secondary folding operation: In the first folded state b, the second-section bracket 420 is unpinned from the first pin 510. The second-section bracket 420 is rotated around the axis of the third mounting hole 413, making the sixth mounting hole 422 of the second-section bracket 420 and the fourth mounting hole 414 of the first-section bracket 410 coaxial. The first pin 510 is then inserted, and the first washer 520 and the first pin clip 530 are installed. The process is then switched to state c, completing the second rotation. Because the second-section bracket 420 rotates outward in state c, it avoids interference with the counterweight support 600. Furthermore, since the second-section bracket 420 rotates around the axis of the third mounting hole 413, the widest dimension w of the middle bracket 400 remains unchanged and does not exceed the width limit. (See...) Figure 6 ;
[0042] This embodiment provides multiple matching mounting holes between the first section 410 and the second section 420 of the middle support 400. By utilizing different combinations of these mounting holes, various working states of the second section 420 can be achieved. This effectively avoids interference between the support and other components such as the counterweight support 600, while maintaining the maximum width and increasing the space utilization of the middle support accessories. The structure is simple and low-cost, facilitating interchangeability between supports of different products and improving the versatility of the middle support. It also reduces the need for new component design due to changes in space requirements. Example 2
[0043] See Figure 7 Based on Embodiment 1, several other mounting holes are provided on the same arc between the second mounting hole 412 and the fourth mounting hole 414 of the first bracket 410. When the sixth mounting hole 422 of the second bracket 420 is connected to the corresponding mounting hole, the deflection angle of the second bracket 420 can be further adjusted. In addition to realizing the three working states of the second bracket 420 in Embodiment 1, other working states can be added to adapt to different spatial arrangement requirements. There is no need to redesign the structure of the second bracket 420, the structure has good versatility, and the product design workload is simplified. Example 3
[0044] See Figure 8 Based on Embodiment 1, the second mounting hole 412 and the fourth mounting hole 414 of the first bracket 410 are connected by an arc groove 416. The principle is similar to that of Embodiment 2. In addition to increasing the working state of the second bracket 420, it can also simplify the action of repeatedly disassembling and assembling the hinge pin when the second bracket 420 rotates, and further improve the efficiency of switching working states.
[0045] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.
Claims
1. A crane jib support, comprising a front support (300), a middle support (400), and a rear support (500) mounted on a main boom (100) for supporting a jib (200), wherein the middle support (400) comprises a first support section (410) and a second support section (420), characterized in that: The first section of the bracket (410) is provided with a first mounting hole (411), a second mounting hole (412), a third mounting hole (413), and a fourth mounting hole (414); the second section of the bracket (420) is provided with a fifth mounting hole (421) and a sixth mounting hole (422); the different mounting holes are connected by a hinge mechanism to realize three different installation states of the second section of the bracket (420): State a: The first mounting hole (411) and the second mounting hole (412) on the first bracket (410) are coaxially connected to the fifth mounting hole (421) and the sixth mounting hole (422) on the second bracket (420), respectively; State b: The second mounting hole (412) and the third mounting hole (413) on the first section of the bracket (410) are coaxially connected to the sixth mounting hole (422) and the fifth mounting hole (421) on the second section of the bracket (420), respectively; State c: The third mounting hole (413) and the fourth mounting hole (414) on the first bracket (410) are coaxially connected to the fifth mounting hole (421) and the sixth mounting hole (422) on the second bracket (420), respectively; The two-section bracket (420) is connected by the above-mentioned mounting holes to form three different working states, which meet the working requirements of the middle bracket (400).
2. The crane jib bracket according to claim 1, characterized in that: The hinge mechanism is a simple pin hinge, comprising a first pin (510), a first washer (520), and a first pin catch (530).
3. The crane jib bracket according to claim 1, characterized in that: The hinge mechanism is a spring pin hinge, comprising a second pin (430), a second pin (440), a spring (450), a bushing (460), and a nut (470) installed in sequence; the nut (470) is screwed onto the second pin (440), and the spring (450) is fitted onto the second pin (440).
4. The crane jib bracket according to claim 3, characterized in that: A handle (480) is also mounted on the second pin (440) via a second washer (490) and a nut (470).
5. The crane jib bracket according to claim 1, characterized in that: Each mounting hole of the bracket section (410) is either a two-hole round hole corresponding to the top and bottom or a U-shaped groove (415) with a notch.
6. The crane jib bracket according to claim 1, characterized in that: The distances between the second mounting hole (412), the fourth mounting hole (414) and the third mounting hole (413) are equal, that is, the second mounting hole (412) and the fourth mounting hole (414) are on the same arc with the third mounting hole (413) as the center.
7. The crane jib bracket according to claim 6, characterized in that: Several other mounting holes are also provided on the same arc between the second mounting hole (412) and the fourth mounting hole (414).
8. The crane jib bracket according to claim 6, characterized in that: The second mounting hole (412) and the fourth mounting hole (414) are connected by an arc groove (416).