Special-shaped outrigger for truck-mounted crane
By designing an irregular outrigger structure, the problems of bulky and difficult assembly of truck-mounted crane outriggers were solved, achieving lightweighting and improved space utilization, while reducing the risk of vibration and jamming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XCMG XUZHOU TRUCK MOUNTED CRANE CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-08-04
AI Technical Summary
Existing truck-mounted cranes have bulky outrigger structures that occupy a lot of space, limit the load capacity, and are difficult to assemble, posing risks of vibration and jamming.
Design an irregular leg structure, wherein the longitudinal cross-sectional width of the secondary movable leg is smaller than that of the vertical leg, a variable cross-section transition structure is set to realize the nesting and recycling of the legs, and a plate is welded on the inner side of the leg and at the transition corner to enhance the connection strength.
The system achieves lightweight outriggers, improves space utilization, reduces assembly difficulty, minimizes the risk of vibration and jamming, and increases assembly efficiency.
Smart Images
Figure CN224590602U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of outrigger technology for engineering machinery, and in particular to a special-shaped outrigger for a truck-mounted crane. Background Technology
[0002] Outriggers are crucial support components for the normal operation of truck-mounted cranes. Through the extension and retraction of hydraulic cylinders, the outriggers increase the chassis support of the truck-mounted crane, enhancing its anti-tipping stability and thus further improving its lifting capacity. H-type outriggers are a common arrangement for truck-mounted cranes. They are typically positioned at the front and rear ends of the chassis frame. During normal operation, under the action of horizontal and vertical cylinders, the movable outriggers extend to the sides, and the vertical outriggers extend downwards, ultimately supporting the chassis frame and ensuring the stability of the lifted load.
[0003] In existing technology, the vertical outriggers and movable outriggers of truck-mounted cranes are sized to match, i.e., their widths are consistent. Figure 2 As shown in (a), when the volume of the vertical outriggers is increased to enhance their support strength, the volume or dimensions of the movable outriggers (horizontal outriggers) also need to be adjusted and increased accordingly. This simultaneous increase in outrigger volume results in a bulky structure, occupies a large space, and compresses the cargo box installation space of the truck-mounted crane, thus limiting its load capacity. Furthermore, the extension of the movable outriggers by the hydraulic cylinders often causes significant vibration. To reduce the impact of this vibration on the chassis frame, the gap between the outer wall of the movable outrigger and the inner wall of the next-level outrigger is usually strictly limited. However, this indirectly increases the difficulty of outrigger assembly and the risk of outrigger extension / retraction jamming. Utility Model Content
[0004] The purpose of this utility model is to overcome the problems in the background technology and provide a special-shaped outrigger for truck-mounted cranes. Compared with traditional outriggers, the width of the longitudinal section of the secondary movable outrigger is smaller than that of the vertical outrigger, which makes the outrigger smaller in size and weight, which is conducive to achieving lightweight outrigger structure, improving the space utilization of truck-mounted cranes, and improving outrigger assembly efficiency.
[0005] To achieve the aforementioned utility model objectives, the present utility model adopts the following technical solution: a special-shaped outrigger for a truck-mounted crane, comprising a fixed outrigger, a primary movable outrigger, a secondary movable outrigger, and a vertical outrigger. The secondary movable outrigger is retractably nested within the primary movable outrigger, and the primary movable outrigger is retractably nested within the fixed outrigger. The vertical outrigger is fixedly connected to the extended end of the secondary movable outrigger. The width of the longitudinal section of the secondary movable outrigger is smaller than the width of the longitudinal section of the vertical outrigger. In conventional outriggers, the width of the vertical outrigger and the width of the secondary movable outrigger are the same, while in this special-shaped outrigger, the outrigger width is smaller than the width of the vertical outrigger. Correspondingly, the width of the secondary movable outrigger, the primary movable outrigger, the secondary movable outrigger, the primary movable outrigger, and the vertical outrigger... The volume of the secondary movable outriggers and fixed outriggers is smaller than that of traditional truck-mounted crane outriggers. This reduces the overall weight of the vehicle, achieving lightweight construction and improving the space utilization of the truck-mounted crane. It also reduces the difficulty and efficiency of outrigger assembly and mitigates the risk of outrigger extension and retraction jamming. The extended ends of the secondary movable outriggers, the outer ends of the primary movable outriggers, and the outer ends of the fixed outriggers are all equipped with variable cross-section transition structures. These variable cross-section transition structures are used to connect and nest the outriggers together. The variable cross-section structure increases the structural connection strength and facilitates the nesting and retraction of the outriggers.
[0006] Furthermore, the variable cross-section transition structure at the extended end of the secondary movable outrigger is specifically as follows: the upper cover plate, inner side plate, and bottom plate of the secondary movable outrigger form a transition corner at the end to enhance the connection strength with the vertical outrigger.
[0007] Furthermore, the variable cross-section transition structure at the outer end of the first-stage movable leg is specifically as follows: the upper cover plate II, the inner side plate II, and the bottom plate II of the first-stage movable leg form a transition corner at the end, which is used to guide the nesting and retraction of the second-stage movable leg and strengthen the connection strength; the variable cross-section transition structure at the outer end of the fixed leg is specifically as follows: its grooved plate and the middle partition plate form a transition corner at the end, which is used to guide the nesting and retraction of the first-stage movable leg and strengthen the connection strength.
[0008] Furthermore, the inner side and transition corner of the secondary movable outrigger, as well as the inner side and transition corner of the primary movable outrigger, are all welded with plates. These plates are used to strengthen the structural strength of the outrigger and the connection strength of the variable cross-section transition structure.
[0009] Furthermore, the transition angles at the ends of the secondary movable outrigger, the primary movable outrigger, and the fixed outrigger are all located on the same side of the outrigger and match each other after the outriggers are nested and retracted.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] 1. In this utility model, the width of the longitudinal section of the secondary movable outrigger is smaller than the width of the longitudinal section of the vertical outrigger, while the height of the longitudinal section remains unchanged. The dimensions of the primary movable outrigger and the fixed outrigger are correspondingly reduced. Therefore, the volume of the horizontal outrigger (i.e., the secondary movable outrigger, the primary movable outrigger, and the fixed outrigger) in this utility model is smaller than that of the traditional horizontal outrigger. Thus, the design can increase the size of the vertical outrigger while simultaneously increasing the volume of the horizontal outrigger. This solves the problem of the existing technology where the structure is bulky and occupies a lot of space after the volume of the horizontal outrigger is increased simultaneously. This not only compresses the cargo box installation space of the truck-mounted crane but also limits the load capacity. The compression of the outrigger structure helps to achieve overall weight reduction, improve the space utilization rate of the truck-mounted crane, reduce production costs, and also helps to reduce the difficulty of outrigger assembly and improve the efficiency of outrigger assembly.
[0012] 2. In this utility model, transition corners are provided on the primary movable leg and the secondary movable leg. On the one hand, this provides guidance for the nested retraction of the leg, ensuring that the leg is retracted to the designated position. On the other hand, it helps to strengthen the connection strength of the leg.
[0013] 3. In this utility model, a plate is provided on the inner side of the outrigger and at the transition corner. The plate can strengthen the structural strength of the outrigger, thereby ensuring the support force of the outrigger.
[0014] 4. Compared to traditional outrigger structures, this irregularly shaped outrigger structure strictly guarantees structural strength and outrigger support capacity while optimizing the outrigger cross-section to achieve overall outrigger structural compression. Taking the connection between the secondary movable outrigger and the vertical outrigger as an example, comparing it with the connection form of traditional outriggers, it can be seen that the outrigger support capacity has strict requirements, resulting in a high space occupancy rate and a relatively fixed form for the vertical outrigger. To ensure the connection strength between the extended end of the secondary movable outrigger and the vertical outrigger, a corner transition is designed for the extended end of the secondary movable outrigger, supplemented by a plate for reinforcement. Correspondingly, to ensure that the movable outrigger retracts to the designated position, a matching corner transition design is also carried out on the mating ends of the primary movable outrigger and the fixed outrigger. Attached Figure Description
[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0016] Figure 1 This is a schematic diagram of the overall structure of the irregular-shaped support leg of this utility model.
[0017] Figure 2 (a) is a top view of the connection between the vertical support leg and the secondary movable support leg in the prior art, and (b) is a top view of the connection between the vertical support leg and the secondary movable support leg in this utility model.
[0018] Figure 3 for Figure 1 A schematic diagram showing the connection between the extended end of the secondary movable outrigger at point A and the vertical outrigger.
[0019] Figure 4 for Figure 1 A schematic diagram showing the connection between the outer end of the primary movable outrigger and the secondary movable outrigger at point B.
[0020] Figure 5 for Figure 1 A schematic diagram showing the connection between the outer end of the fixed outrigger at point C and the primary movable outrigger.
[0021] The attached diagram is labeled as follows: 1. Vertical support leg; 2. Secondary movable support leg; 3. Primary movable support leg; 4. Fixed support leg; 5. Top cover plate one; 6. Inner side plate one; 7. Bottom plate one; 8. Top cover plate two; 9. Inner side plate two; 10. Panel; 11. Bottom plate two; 12. Channel plate; 13. Intermediate partition plate; 14. Variable cross-section transition structure. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.
[0023] Example: Figures 1-5 As shown, this embodiment provides a special-shaped outrigger for a truck-mounted crane, including a fixed outrigger 4, a primary movable outrigger 3, a secondary movable outrigger 2, and a vertical outrigger 1. The secondary movable outrigger 2 is retractably nested inside the primary movable outrigger 3, the primary movable outrigger 3 is retractably nested inside the fixed outrigger 4, and the vertical outrigger 1 is fixedly connected to the extended end of the secondary movable outrigger 2.
[0024] like Figure 2 As shown, the width of the longitudinal section of the secondary movable outrigger 2 is smaller than the width of the longitudinal section of the vertical outrigger 1. In traditional outriggers, the width of the vertical outrigger is the same as that of the secondary movable outrigger. In the design, when it is necessary to increase the support force of the vertical outrigger and increase its volume, the volume of the horizontal outrigger also needs to be increased accordingly. However, in the design of this special-shaped outrigger, the width of the horizontal outrigger is smaller than that of the vertical outrigger, that is, the volume of the horizontal outrigger does not need to be increased accordingly. Therefore, the volume of the horizontal outrigger (secondary movable outrigger 2, primary movable outrigger 3 and fixed outrigger 4) in this special-shaped outrigger is smaller than the volume of the horizontal outrigger of the traditional truck-mounted crane. The reduction in the volume of the horizontal outrigger can reduce the weight of the whole vehicle, realize the lightweighting of the whole machine, and improve the space utilization of the truck-mounted crane. On the other hand, it is beneficial to reduce the difficulty of outrigger assembly, improve the efficiency of outrigger assembly, and also reduce the risk of outrigger extension and retraction jamming.
[0025] The extended end of the secondary movable leg 2, the outer end of the primary movable leg 3, and the outer end of the fixed leg 4 are all provided with a variable cross-section transition structure 14. The variable cross-section transition structure 14 is used to realize the connection and nesting and recycling between adjacent legs. On the one hand, it can increase the structural connection strength, and on the other hand, it is conducive to the nesting and recycling of the legs.
[0026] Specifically, such as Figure 2 and Figure 3 As shown, the variable cross-section transition structure 14 at the extended end of the secondary movable leg 2 is specifically: the upper cover plate 5, the inner side plate 6, and the bottom plate 7 of the secondary movable leg 2 form a transition corner at the end, which is used to strengthen the connection strength with the vertical leg 1, and also facilitates nesting and retraction into the interior of the secondary movable leg 2.
[0027] like Figure 4 As shown, the variable cross-section transition structure 14 at the outer end of the first-stage movable leg 3 is specifically: the upper cover plate 2 8, the inner side plate 2 9 and the bottom plate 2 11 of the first-stage movable leg 3 form a transition corner at the end, which is used to guide the nesting and retraction of the second-stage movable leg 2 and strengthen the connection strength.
[0028] like Figure 5 As shown, the variable cross-section transition structure 14 at the outer end of the fixed support leg 4 is specifically: its groove plate 12 and middle partition plate 13 form a transition corner at the end, which is used to guide the nesting and retraction of the first-stage movable support leg 3 and to strengthen the connection strength.
[0029] Plates 10 are welded to the inner side and transition corner of the secondary movable outrigger 2, as well as the inner side and transition corner of the primary movable outrigger 3. The plates 10 are used to strengthen the structural strength of the outrigger and the connection strength of the variable cross-section transition structure 14, and to ensure the support force of the outrigger.
[0030] The transition angles at the ends of the secondary movable outrigger 2, the primary movable outrigger 3, and the fixed outrigger 4 are all located on the inner side of the outrigger. The outer side of the horizontal outrigger is aligned with the outer edge of the vertical outrigger, and the transition angles of adjacent outriggers match after the outriggers are nested and retracted, so that the outriggers can be retracted into place.
[0031] In Example 2, the transition corner structure on the horizontal support leg can also be set on both sides as needed, instead of being limited to the setting on the inside of the horizontal support leg as in Example 1.
[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A special-shaped outrigger for a truck-mounted crane, comprising a fixed outrigger (4), a primary movable outrigger (3), a secondary movable outrigger (2), and a vertical outrigger (1), wherein the secondary movable outrigger (2) is retractably nested within the primary movable outrigger (3), the primary movable outrigger (3) is retractably nested within the fixed outrigger (4), and the vertical outrigger (1) is fixedly connected to the extended end of the secondary movable outrigger (2); characterized in that, The width of the longitudinal section of the secondary movable leg (2) is smaller than the width of the longitudinal section of the vertical leg (1). The extended end of the secondary movable leg (2), the outer end of the primary movable leg (3) and the outer end of the fixed leg (4) are all provided with a variable cross section transition structure (14). The variable cross section transition structure (14) is used to realize the connection and nesting recycling between adjacent legs.
2. A special shaped outrigger for a truck-mounted crane according to claim 1, characterized in that The variable cross-section transition structure (14) at the extended end of the secondary movable outrigger (2) is specifically: the upper cover plate (5), inner side plate (6) and bottom plate (7) of the secondary movable outrigger (2) form a transition corner at the end to strengthen the connection strength with the vertical outrigger (1).
3. A special shaped outrigger for a truck-mounted crane according to claim 2, characterised in that The variable cross-section transition structure (14) at the outer end of the first-level movable support leg (3) is specifically: the upper cover plate 2 (8), inner side plate 2 (9) and bottom plate 2 (11) of the first-level movable support leg (3) form a transition corner at the end, which is used to guide the nesting and retraction of the second-level movable support leg (2) and strengthen the connection strength. The variable cross-section transition structure (14) at the outer end of the fixed support leg (4) is specifically: its groove plate (12) and middle partition plate (13) form a transition corner at the end, which is used to guide the nesting and retraction of the first-stage movable support leg (3) and strengthen the connection strength.
4. A special shaped support leg for a truck-mounted crane according to claim 3, characterized in that The inner side and transition corner of the secondary movable outrigger (2) and the inner side and transition corner of the primary movable outrigger (3) are all welded with a plate (10). The plate (10) is used to strengthen the structural strength of the outrigger and the connection strength of the variable cross-section transition structure (14).
5. A special shaped outrigger for a truck-mounted crane according to claim 3, characterized in that The transition angles at the ends of the secondary movable support leg (2), the primary movable support leg (3), and the fixed support leg (4) are all located on the same side of the support leg and match each other after the support leg is nested and retracted.