Bridge expansion deck with floating slider structure
By adopting a floating slider structure on the bridge-expanding chassis and utilizing the arc surface design to achieve adaptive adjustment of the slider, the problem of reduced contact area caused by manufacturing deformation and load tilting of the fixed slider is solved, which improves operational stability and slider life and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LOU XIAO ZHONG GONG YOU XIAN GONG SI
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-02
AI Technical Summary
The existing bridge expansion chassis uses a fixed slider, which is prone to tilting due to manufacturing deformation, installation tilt, and load, resulting in a reduction in the effective contact area, increased compressive stress, and reduced service life.
A floating slider structure is adopted, and the sliding position of the bridge expansion leg is adjusted by the drive source. Each set of floating slider structure includes a slider body and a slider base. The protrusion is set with an arc surface to allow adaptive adjustment and ensure good contact between the slider and the bottom wall of the sliding cavity or the upper end of the leg.
It improves the operational stability of the expanded bridge chassis, reduces slider wear, extends service life, and reduces production and assembly costs.
Smart Images
Figure CN224311833U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge expansion chassis technology, and in particular to a bridge expansion chassis using a floating slider structure. Background Technology
[0002] Some models of construction machinery, such as boom-type aerial work platforms, use extended-bridge chassis to increase the overall operational stability of the machine. An extended-bridge chassis typically includes a chassis body, movable extended-bridge outriggers, extended-bridge cylinders, and sliding blocks. Currently, the sliding blocks are fixed, attached to either the chassis body or the movable extended-bridge outriggers.
[0003] The manufacturing of the chassis body and movable bridge outriggers inevitably involves deformation and tilting of the slider mounting surface, and gaps are also unavoidable during assembly. In addition, during actual use, under the action of the machine's weight, load, and tire reaction force, the movable bridge outriggers tilt upwards. At this time, the effective contact area of the fixed slider will decrease, resulting in increased compressive stress, accelerated slider wear, and reduced service life. Utility Model Content
[0004] This utility model embodiment provides an expanded bridge chassis using a floating slider structure to solve the problems in the prior art.
[0005] This utility model embodiment adopts the following technical solution: a bridge expansion chassis using a floating slider structure, comprising: a chassis body having at least two sliding cavities; bridge expansion legs, configured with a plurality of legs corresponding one-to-one with the sliding cavities, each bridge expansion leg being slidably connected to the corresponding sliding cavity via at least two sets of floating slider structures, and the sliding position of the bridge expansion leg relative to the chassis body being adjusted by a driving source; each set of floating slider structures comprising: a slider body having a plurality of protrusions, each protrusion having a first arc surface; and a slider base for fixedly connecting to the object to be connected, wherein the base has... There are several sliding grooves, and each protrusion corresponds to one sliding groove. The shape of each protrusion is adapted to the shape of the corresponding sliding groove, and the protrusion slides in conjunction with the sliding groove. At least one set of floating slider structure slider bases is fixed to the lower inner side of the bridge expansion leg, and the slider body of the floating slider structure slides in conjunction with the bottom wall of the corresponding sliding cavity. At least one set of floating slider structure is also provided at the top wall of the outer end of each sliding cavity, and the slider base of the floating slider structure is fixed to the top wall of the outer end of the sliding cavity, and the slider body of the floating slider structure slides in conjunction with the upper end of the corresponding bridge expansion leg.
[0006] Preferably, the arc direction of the first arc surface allows the bridge extension leg to move up and down relative to the chassis body.
[0007] Preferably, the protrusion is further provided with a second arc surface, the arc direction of the second arc surface being perpendicularly intersecting the arc direction of the first arc surface, and the second arc surface being located on the outside of the corresponding protrusion.
[0008] Preferably, the protrusion is further provided with several curved surfaces, which cooperate with the first arc surface to form a sphere or hemisphere.
[0009] Preferably, each bridge expansion leg is further provided with two fixed sliders between it and the corresponding sliding cavity; one fixed slider is fixedly installed on the upper inner side of the bridge expansion leg, and the other fixed slider is fixedly installed on the bottom wall of the outer side of the corresponding sliding cavity.
[0010] Preferably, at least one pad is provided between each slider base and the object to be connected.
[0011] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:
[0012] The first arc surface on the protrusion allows the slider body a certain degree of freedom of movement within the sliding groove of the slider base. During the sliding process of the extended bridge support leg, factors such as manufacturing deformation of the chassis body and the movable extended bridge support leg, tilting of the slider mounting surface, assembly gaps, or the force of the overall machine load may cause the extended bridge support leg to tilt. In this case, the slider body of the floating slider structure can adaptively adjust its position and angle within the sliding groove of the slider base to ensure that the slider body maintains good contact with the bottom wall of the sliding cavity or the upper end of the extended bridge support leg. Attached Figure Description
[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a cross-sectional view of the present invention;
[0016] Figure 3 for Figure 2 Enlarged view of section A in the image;
[0017] Figure 4 This is a three-dimensional structural diagram of the fixed slider of this utility model;
[0018] Figure 5 This is a three-dimensional structural diagram of the floating slider structure of this utility model;
[0019] Figure 6Explosion of the floating slider structure of this utility model Figure 1 ;
[0020] Figure 7 This is a cross-sectional view of the floating slider structure of this utility model;
[0021] Figure 8 Explosion of the floating slider structure of this utility model Figure 2 ;
[0022] Figure 9 This is a schematic diagram of the structure of an expanded bridge chassis in the prior art.
[0023] Figure Labels
[0024] 1-Chassis main body; 11-Sliding cavity;
[0025] 2-Bridge expansion legs;
[0026] 3-Floating slider structure; 31-Slider body; 311-Protrusion; 312-First arc surface; 313-Second arc surface; 32-Slider base; 321-Sliding groove;
[0027] 4-Drive source;
[0028] 5-Fixed slider;
[0029] 6-Gasket. Detailed Implementation
[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0031] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0032] Some models of construction machinery, such as boom-type aerial work platforms, use extended-bridge chassis to increase the overall operational stability of the machine. An extended-bridge chassis generally includes the chassis body 1, movable extended-bridge outriggers 2, extended-bridge cylinders, and sliders, etc. Currently, all sliders are fixed sliders 5 (i.e., such as...). Figure 2 Each of the bridge expansion legs 2 is connected to the corresponding chassis body 1 through a fixed slider 5, and is fixed to the chassis fixed chassis body 1 or the movable bridge expansion leg 2.
[0033] The chassis body 1 and the movable bridge support leg 2 are inevitably subject to deformation and tilting of the slider mounting surface during manufacturing, and gaps are also unavoidable during assembly. In addition, during actual use, under the action of the machine's weight, load, and tire reaction force, the movable bridge support leg 2 tilts upward. At this time, the effective contact area of the fixed slider 5 will be reduced, resulting in increased compressive stress, accelerated slider wear, and reduced service life.
[0034] Reference Figures 1 to 8 As shown, this application provides a bridge expansion chassis with a floating slider structure, which mainly includes a chassis body 1, bridge expansion legs 2 and a floating slider structure 3.
[0035] The chassis body 1 has at least two sliding cavities 11; the bridge expansion legs 2 are configured with a number of them, each corresponding to one of the sliding cavities 11. Each bridge expansion leg 2 is slidably connected to the corresponding sliding cavity 11 through at least two sets of floating slider structures 3, and the sliding position of the bridge expansion leg 2 relative to the chassis body 1 is adjusted by a drive source 4 (the drive source 4 is generally a hydraulic cylinder, i.e., a bridge expansion cylinder).
[0036] Each set of floating slider structures 3 includes a slider body 31 and a slider base 32. The slider body 31 has several protrusions 311, and each protrusion 311 is provided with a first arc surface 312. The slider base 32 is used to fix the object to be connected. It has several sliding grooves 321, and each protrusion 311 corresponds to one sliding groove 321. The shape of each protrusion 311 is adapted to the shape of the corresponding sliding groove 321, and the protrusion 311 slides in cooperation with the sliding groove 321. The slider base 32 of at least one set of floating slider structures 3 is fixed to the lower inner side of the bridge expansion leg 2, and the slider body 31 of the floating slider structure 3 slides in cooperation with the bottom wall of the corresponding sliding cavity 11. At least one set of floating slider structures 3 is also provided at the top wall of the outer end of each sliding cavity 11, and the slider base 32 of the floating slider structure 3 is fixed to the top wall of the outer end of the sliding cavity 11. The slider body 31 of the floating slider structure 3 slides in cooperation with the upper end of the corresponding bridge expansion leg 2. It should be noted that in practical applications, an extended bridge chassis typically corresponds to four extended bridge outriggers, which is the common structure of an extended bridge chassis (see reference). Figure 9 );like Figure 1 Only one front axle (or rear axle) of the chassis is shown; the overall structure of the chassis is not fully displayed.
[0037] In this embodiment, the first arc surface 312 on the protrusion 311 (such as...) Figure 5 and Figure 6This allows the slider body 31 to have a certain degree of freedom of movement within the sliding groove 321 of the slider base 32. During the sliding process of the extended bridge support leg 2, due to factors such as manufacturing deformation of the chassis body 1 and the movable extended bridge support leg 2, tilting of the slider mounting surface, or assembly gaps, or under the load of the entire machine, the extended bridge support leg 2 may tilt. In this case, the slider body 31 of the floating slider structure 3 can adaptively adjust its position and angle within the sliding groove 321 of the slider base 32 to ensure that the slider body 31 maintains good contact with the bottom wall of the sliding cavity 11 or the upper end of the extended bridge support leg 2.
[0038] Specifically, the floating slider structure 3, fixed to the lower inner side of the bridge expansion leg 2, has a slider body 31 that slides in cooperation with the bottom wall of the sliding cavity 11. When the bridge expansion leg 2 tends to tilt upward, the slider body 31 can rotate along the first arc surface 312 in the sliding groove 321 of the slider base 32, automatically adjusting its posture and increasing the effective contact area with the bottom wall of the sliding cavity 11. The floating slider structure 3, fixed to the top wall of the outer side of the sliding cavity 11, has a slider body 31 that slides in cooperation with the upper end of the bridge expansion leg 2. Similarly, when the bridge expansion leg 2 changes its posture, the slider body 31 can adaptively adjust to maintain good contact with the bridge expansion leg 2, thereby reducing the compressive stress, reducing slider wear, and extending the service life of the slider.
[0039] Furthermore, the floating slider setting can appropriately reduce the precision requirements of each component to a certain extent, reducing the impact of manufacturing and assembly errors, and also reducing production and assembly costs.
[0040] Generally speaking, the bridge expansion leg 2 will inevitably tend to tilt upwards under the load of the whole machine. Therefore, the arc direction of the first arc surface 312 should be able to allow the bridge expansion leg 2 to move up and down relative to the chassis body 1 (that is, allow the bridge expansion leg 2 to tilt upwards or downwards, while the first arc surface 312 and the sliding groove 321 can always maintain surface contact).
[0041] In other practical applications, the protrusion 311 is also provided with a second arc surface 313 (such as...). Figure 8 The arc direction of the second arc surface 313 is perpendicular to the arc direction of the first arc surface 312, and the second arc surface 313 is located outside the corresponding protrusion 311. It should be noted that when processing the protrusion 311, the second arc surface 313 and the first arc surface 312 should be smoothly connected.
[0042] In this embodiment, due to the vertically intersecting first arc surface 312 and second arc surface 313 provided on the protrusion 311, the degree of freedom of movement of the slider body 31 within the sliding groove 321 of the slider base 32 is further increased. During the sliding process of the bridge expansion leg 2, when encountering more complex deformation, tilting, or posture changes, the slider body 31 can utilize the combination of the first arc surface 312 and the second arc surface 313 to achieve adaptive adjustment in two mutually perpendicular directions. For example, when the bridge expansion leg 2 not only tilts vertically but also shifts horizontally, the first arc surface 312 can handle the vertical posture adjustment, while the second arc surface 313 can adapt to the horizontal shift, enabling the slider body 31 to maintain good contact and sliding fit with the bottom wall of the sliding cavity 11 or the upper end of the bridge expansion leg 2 in all directions, ensuring that the bridge expansion leg 2 can slide smoothly even under complex working conditions.
[0043] In other practical applications, the protrusion 311 is also provided with several curved surfaces, which, together with the first arc surface 312, form a spherical or hemispherical surface (not shown in the figure). Compared with only the first arc surface 312 or the first arc surface 312 and the second arc surface 313, the spherical or hemispherical design allows the slider body 31 to freely adjust its posture in three-dimensional space, making it more adaptable to the complex deformation and posture changes of the bridge expansion leg 2.
[0044] In some practical applications, two fixed sliders 5 are also provided between each bridge expansion leg 2 and the corresponding sliding cavity 11; one fixed slider 5 is fixedly installed on the upper inner side of the bridge expansion leg 2, and the other fixed slider 5 is fixedly installed on the bottom wall of the outer side of the corresponding sliding cavity 11.
[0045] When the extended bridge chassis is in operation, the drive source 4 (usually a hydraulic cylinder) initiates the movement of the extended bridge support leg 2 within the sliding cavity 11 of the chassis body 1. Two fixed sliders 5 and two sets of floating slider structures 3 are installed between the extended bridge support leg 2 and the sliding cavity 11. The fixed slider 5, fixedly installed on the upper inner side of the extended bridge support leg 2, and the fixed slider 5 installed on the bottom wall of the corresponding outer end of the sliding cavity 11, serve as basic sliding guides and supports due to the relatively low stress at their respective locations. The two fixed sliders 5 are fixed relative to their corresponding contact surfaces. The slider body 31 in the floating slider structure 3 can adaptively adjust its position and angle within the sliding groove 321 of the slider base 32.
[0046] Therefore, at points where the stress is not severe, the existing fixed slider 5 can be used to meet the basic sliding and support requirements while reducing costs. Furthermore, the fixed slider 5 can provide relatively more stable guidance and support.
[0047] In summary, regardless of which implementation method is adopted, in actual production, refer to Figure 5As shown, each floating slider structure 3 is configured with two floating sliders and a floating slider base 32. The floating slider base 32 has four sliding grooves 321, and each floating slider has two protrusions 311.
[0048] Each bridge extension leg 2 corresponds to two sets of floating sliders. Each slider base 32 is fixedly connected to the object to be connected by bolts. One side of the fixed slider 5 is also fixed by bolts. At least one gasket 6 is provided between each slider base 32 and the object to be connected (e.g., Figure 3 Gasket 6 allows for fine-tuning of the installation gap, ensuring a tight and stable connection.
[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A bridge expansion chassis employing a floating slider structure, characterized in that, include: The chassis body (1) has at least two sliding cavities (11). The bridge expansion leg (2) is configured with several of them, each corresponding to a sliding cavity (11). Each bridge expansion leg (2) is slidably connected to the corresponding sliding cavity (11) through at least two sets of floating slider structures (3), and the sliding position of the bridge expansion leg (2) relative to the chassis body (1) is adjusted by a drive source (4). Each set of floating slider structures (3) includes: The slider body (31) has several protrusions (311), and each protrusion (311) is provided with a first arc surface (312). The slider base (32) is used to fix the object to be connected. It has a number of sliding grooves (321) and each protrusion (311) corresponds to a sliding groove (321). The shape of each protrusion (311) is adapted to the shape of the corresponding sliding groove (321) and the protrusion (311) slides in cooperation with the sliding groove (321). At least one set of floating slider structures (3) has its slider base (32) fixed to the lower inner side of the bridge expansion leg (2), and the slider body (31) of the floating slider structure (3) slides in cooperation with the bottom wall of the corresponding sliding cavity (11); at least one set of floating slider structures (3) is also provided at the top wall of the outer side of each sliding cavity (11), and the slider base (32) of the floating slider structure (3) is fixed to the top wall of the outer side of the sliding cavity (11), and the slider body (31) of the floating slider structure (3) slides in cooperation with the upper end of the corresponding bridge expansion leg (2).
2. The bridge expansion chassis using a floating slider structure according to claim 1, characterized in that, The arc direction of the first arc surface (312) allows the bridge expansion leg (2) to move up and down relative to the chassis body (1).
3. The bridge expansion chassis using a floating slider structure according to claim 2, characterized in that, The protrusion (311) is also provided with a second arc surface (313), the arc direction of the second arc surface (313) is perpendicularly intersecting the arc direction of the first arc surface (312), and the second arc surface (313) is located on the outside of the corresponding protrusion (311).
4. The bridge expansion chassis using a floating slider structure according to claim 3, characterized in that, The second arc surface (313) is smoothly connected to the first arc surface (312).
5. The bridge expansion chassis using a floating slider structure according to claim 1, characterized in that, The protrusion (311) is also provided with several curved surfaces, which, together with the first arc surface (312), form a spherical or hemispherical surface.
6. The bridge expansion chassis using a floating slider structure according to claim 1, characterized in that, Each floating slider structure (3) is configured with two floating sliders and a floating slider base (32), which has four sliding grooves (321) and two protrusions (311) on each floating slider.
7. A bridge expansion chassis using a floating slider structure according to claim 1, 3, or 5, characterized in that, Each bridge expansion leg (2) corresponds to two sets of floating sliders.
8. A bridge expansion chassis using a floating slider structure according to claim 7, characterized in that, Two fixed sliders (5) are also provided between each bridge expansion leg (2) and the corresponding sliding cavity (11); one fixed slider (5) is fixedly installed on the upper inner side of the bridge expansion leg (2), and the other fixed slider (5) is fixedly installed on the bottom wall of the outer side of the corresponding sliding cavity (11).
9. A bridge expansion chassis using a floating slider structure according to claim 1, characterized in that, Each slider base (32) is fixedly connected to the object to be connected by bolts.
10. A bridge expansion chassis using a floating slider structure according to claim 1, characterized in that, Each slider base (32) is provided with at least one pad (6) between itself and the object to be connected.