Carriage bottom beam connecting structure

Abstract

The utility model relates to the technical field of boxcar plates, and provides a carriage bottom beam connecting structure which comprises a bottom beam, the upper end face of the bottom beam is used for bearing the bottom end of a carriage side plate, and a lap joint seam is formed at the bearing portion. The first covering part is arranged on the bottom beam and provided with a shielding part, and the shielding part makes contact with one side face of the carriage side plate, is located above the lap joint seam and is used for shielding the lap joint seam from top to bottom; a first beam hole is formed in the side wall of the bottom beam, the first covering part is provided with a first connecting hole corresponding to the first beam hole, and a fastener is used for penetrating through the first beam hole and the first connecting hole and connecting the bottom beam and the first covering part. Through the technical scheme, the technical problems of high production cost, high maintenance difficulty, environmental pollution and the like due to the fact that the side plate and the bottom beam are generally connected in a welding manner in the related technology are solved.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of truck body panel technology, specifically to a truck body bottom beam connection structure. Background Technology

[0002] Traditionally, the side panels and bottom beams of truck bodies are connected by welding. In terms of labor costs, welding, as a skilled trade, requires a high level of skill and experience from the operators, undoubtedly increasing production costs. During welding, the high temperatures molten metal produce large amounts of welding fumes, including harmful gases such as nitrogen oxides, carbon monoxide, and hydrogen fluoride. In the post-weld painting process, to cover welding marks and improve the appearance and corrosion resistance of the truck body, the benzene compounds and formaldehyde in the paint released during spraying and drying. These harmful gases not only threaten the health of workers but also cause air pollution, exacerbating the environmental burden. Furthermore, once the welded truck body connecting plates are damaged, subsequent repairs will consume a significant amount of time and effort, severely impacting the normal operation and turnover of trucks. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a chassis bottom beam connection structure, which solves the technical problems of the side plate and bottom beam connection usually using welding connection, which has high production cost, high maintenance difficulty, and environmental pollution.

[0004] According to one aspect, at least one embodiment of the present invention provides a bottom beam connection structure for a carriage, comprising: a bottom beam, wherein the upper end face of the bottom beam is used to receive the bottom end of the carriage side panel and forms an overlap joint at the receiving part;

[0005] A first cover is disposed on the bottom beam and has a shielding part. The shielding part contacts one side of the side panel of the carriage and is located above the lap joint, for shielding the lap joint from top to bottom.

[0006] The bottom beam has a first beam hole on its side wall, and the first cover has a first connecting hole corresponding to the first beam hole. Fasteners are used to pass through the first beam hole and the first connecting hole and connect the bottom beam and the first cover.

[0007] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, the first cover further has a vertical part disposed on the side wall of the bottom beam, the vertical part having the first connecting hole and a bent part connected to the vertical part and extending in the normal direction to the bottom of the bottom beam relative to the vertical part, the bent part abutting against the bottom wall of the bottom beam.

[0008] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, a second beam hole is also provided on the bottom wall of the bottom beam, and a second connecting hole corresponding to the second beam hole is provided on the bent part. Fasteners are used to pass through the second beam hole and the second connecting hole and connect the bottom beam and the first cover.

[0009] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, the contact area between the shielding part and the carriage side panel is a shielding seam, and the upper side of the shielding seam is used for applying adhesive.

[0010] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, the bottom beam further has a side support portion, which is used to contact the other side of the carriage side panel.

[0011] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, a plate hole is provided at the bottom of the carriage side plate, and a third beam hole corresponding to the plate hole is provided in the side support part. Fasteners are used to pass through the plate hole and the third beam hole and connect the bottom beam and the carriage side plate.

[0012] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, the shielding part can shield one side of the plate hole from top to bottom.

[0013] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, the carriage side panel has a plurality of first protrusions and first recesses connected in sequence, and the shielding part has corresponding second protrusions and second recesses for adapting to the side of the carriage side panel.

[0014] For example, in a carriage bottom beam connection structure provided in at least one embodiment of the present invention, there is a space between the vertical part and the first concave part or the first convex part.

[0015] The beneficial effects of the embodiments of this utility model are as follows:

[0016] In this invention, the cover is installed on the bottom beam. Fasteners can pass through the first connecting hole and the first beam hole on the side wall of the bottom beam. By using fasteners (such as bolts, rivets, etc.) passing through the two holes, the cover is rigidly connected to the bottom beam, thereby fixing the position of the cover. This can replace the traditional post-welding painting concealing process, directly covering the overlap seam with the cover, eliminating the need for additional welding marks, and resulting in a cleaner appearance.

[0017] Once the cover is positioned, it rests on one side of the side panel of the carriage and abuts against the side of the side panel, above the overlap seam, creating a top-down shielding effect. This prevents rainwater, dust, and corrosive substances from directly penetrating the gaps, avoiding internal metal corrosion, extending the service life of the carriage, reducing labor costs (it can be operated by ordinary assembly workers), shortening maintenance time, and facilitating standardized production and large-scale assembly as each component is independently detachable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the bottom beam connection structure of the carriage according to the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the exploded structure of an embodiment;

[0021] Figure 3 for Figure 1 The first-view structural schematic diagram of the bottom beam, the bottom of the side panel of the carriage, and the first covering in the embodiment;

[0022] Figure 4 for Figure 1 The second-view structural schematic diagram of the bottom beam, the bottom of the side panel of the carriage, and the first covering in the embodiment;

[0023] Figure 5 for Figure 1 A schematic diagram of the bottom beam structure in the embodiment;

[0024] Figure 6 for Figure 1 A schematic diagram of the structure of the first cover in the embodiment.

[0025] In the diagram: 1. Bottom beam; 101. First beam hole; 102. Second beam hole; 103. Side support; 104. Third beam hole; 2. Overlap joint; 3. First cover; 301. Covering part; 3011. Second protrusion; 3012. Second recess; 302. Vertical part; 303. Bending part; 304. First connecting hole; 305. Second connecting hole; 4. Covering joint; 5. Carriage side panel; 501. Panel hole; 502. First protrusion; 503. First recess; 504. Connecting part; 6. Spacing. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0027] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0028] In this document, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 utility model.

[0031] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] like Figures 1-6As shown, this invention illustrates a connection structure for a carriage bottom beam 1 in one embodiment. The upper surface of the bottom beam 1 serves as a support surface for the bottom of the carriage side panel 5, allowing the carriage side panel 5 to stand vertically above the bottom beam 1. An overlap seam 2 is formed at the point where the bottom of the carriage side panel 5 contacts the upper surface of the bottom beam 1.

[0033] The cover is installed on the base beam 1. Fasteners can pass through the first connecting hole 304 and the first beam hole 101 on the side wall of the base beam 1. Note that the holes are preferably not completely aligned, as alignment would affect the bolt passage. Therefore, partial alignment is preferred. Fasteners (such as bolts, rivets, etc.) are used to pass through the two holes to rigidly connect the cover to the base beam 1, thereby fixing the position of the cover. This can replace the traditional post-weld painting concealing process, directly covering the overlap seam 2 with the cover, eliminating the need for additional welding treatment and resulting in a cleaner appearance.

[0034] After the cover is fixed in position, it is located on one side of the side panel 5 of the carriage and abuts against the side of the side panel 5, and is located above the overlap seam 2, forming a top-down shielding effect on the overlap seam 2. This prevents rainwater, dust, and corrosive substances from directly intruding into the gaps, avoids internal metal corrosion, extends the service life of the carriage, reduces labor costs (ordinary assemblers can operate it), shortens maintenance time, and each component is independently detachable, facilitating standardized production and large-scale assembly.

[0035] In some examples, such as Figure 2 and Figure 3 As shown, the first cover 3 also has a vertical portion 302 disposed on the side wall of the bottom beam 1. The vertical portion 302 is fixed to the outer side of the side wall of the bottom beam 1 and is a plate-like structure perpendicular to the upper end face of the bottom beam 1. A first connecting hole 304 is provided on it for connection with the first beam hole 101 of the side wall of the bottom beam 1 by fasteners. The bent portion 303 is connected to the vertical portion 302 and extends from the vertical portion 302 toward the bottom of the bottom beam 1 in the normal direction (i.e., bending toward the bottom of the bottom beam 1). The bent portion 303 and the vertical portion 302 form an "L"-shaped structure. The bent portion 303 abuts against the bottom wall of the bottom beam 1, that is, it contacts the plane of the bottom of the bottom beam 1, so that the cover and the bottom beam 1 are in contact on two sides, which improves the anti-overturning ability of the cover and avoids displacement or falling off due to uneven force.

[0036] In some examples, such as Figure 5As shown, a second beam hole 102 is provided on the bottom wall of the bottom beam 1, located on the bottom plane of the bottom beam 1 (the area abutting against the bent part 303). The bent part 303 is directly connected to the bottom wall of the bottom beam 1 through the second beam hole 102 and the second connecting hole 305 (e.g., a bolt passes through the bottom wall from bottom to top, or passes through the bent part 303 and the bottom wall from top to bottom). The vertical part 302 is connected to the side wall of the bottom beam 1 through the first connecting hole 304 and fasteners to form a vertical fixation; the bent part 303 is connected to the bottom wall of the bottom beam 1 through the second connecting hole 305 and fasteners to form a horizontal fixation. Through multi-dimensional fixation in both the horizontal and vertical directions, fatigue wear of the fasteners caused by repeated stress is reduced, improving stability and durability.

[0037] In some examples, such as Figure 1 As shown, the side support 103 is an extension of the bottom beam 1, located on the other side (inner side) of the side panel 5 of the carriage. It contacts the inner side of the side panel 5 and provides support to balance the pressure of the outer shield 301. The shield 301 and the side support 103 form a clamping effect from the outer and inner sides of the side panel 5 of the carriage, respectively, so that the side panel 5 of the carriage is fixed between the shield 301 and the side support 103, forming a stable structure with bidirectional contact, which improves the overall stability and structural strength of the carriage.

[0038] In some examples, such as Figure 2 As shown, the plate hole 501 at the bottom of the side panel 5 corresponds to the third beam hole 104 of the side support part 103 of the bottom beam 1. Through tightening, riveting, or other methods, a rigid connection is formed between the bottom of the side panel 5 and the side support part 103 of the bottom beam 1. This hole-alignment and fastener connection method is simple to operate, requiring no complex welding processes or specialized technicians. Ordinary workers can quickly complete the assembly by following the assembly process, reducing labor costs and accelerating production. When the side panel 5 is damaged, only the corresponding fasteners need to be removed to remove the side panel 5 for repair or replacement, eliminating the need for large-scale disassembly of the entire truck body structure. This reduces maintenance difficulty and time costs, improving the operational efficiency of the truck.

[0039] In some examples, such as Figure 4 As shown, after the first cover 3 is installed, it can cover one side of the plate hole 501 from top to bottom. After the side panel 5 of the carriage is connected to the side support part 103 of the bottom beam 1 through the plate hole 501, the third beam hole 104 and the fasteners, the first cover 3 is connected to the first beam hole 101 of the side wall of the bottom beam 1 through its own first connecting hole 304. The shielding part 301 of the first cover 3 is higher than the plate hole 501, thus shielding it. External rainwater, dust and corrosive substances cannot directly contact the plate hole 501 and the fasteners from the outside, thus avoiding the problem of loose connection caused by corrosion. The cover hides the plate hole 501 and the fasteners, making the bottom of the side panel 5 of the carriage flat and uniform, and improving the overall aesthetics of the carriage.

[0040] In some examples, such as Figure 1 As shown, waterproof adhesive is applied to the upper side of the sealing seam 4. After the adhesive fills the gap, it cures to form an elastic sealing layer. When rainwater or moisture from the outside comes into contact with the sealing part 301, due to the adhesive layer's stickiness and surface tension, the rainwater cannot penetrate downwards along the gap, but instead flows down the surface of the sealing part 301, blocking the path of moisture into the interior of the truck bed. At the same time, the vibration generated by the truck's movement causes slight displacement between the sealing part 301 and the side panel 5 of the truck bed. The elastic adhesive layer can absorb this displacement through deformation, maintaining the integrity of the sealing layer and continuously performing its waterproof function.

[0041] In some examples, such as Figure 1 and Figure 2 As shown, the first protrusion 502 and the first recess 503 of the side panel 5 are connected in sequence to form a regular undulating wave-like structure. The second protrusion 3011 and the second recess 3012 of the shielding part 301 correspond to the shape of the side panel 5 and fit together. During installation, the second protrusion 3011 of the shielding part 301 is inserted into the first recess 503 of the side panel 5, and the second recess 3012 accommodates the first protrusion 502 of the side panel 5. The mechanical interlocking of the undulating structure makes the shielding part 301 fit tightly against the side of the side panel 5. The undulating structure increases the contact area between the shielding part 301 and the side panel 5, which can more evenly distribute the vibration and external force generated during the truck's operation.

[0042] In some examples, such as Figure 3 and Figure 4 As shown, the vertical portion 302 of the first cover 3 is installed on the side wall of the bottom beam 1, and a gap space 6 is reserved between it and the first protrusion 502 or the first recess 503 of the side panel 5 of the carriage. After the side panel 5 of the carriage is connected through the plate hole 501, the third beam hole 104 of the side support portion 103 of the bottom beam 1, and fasteners (such as bolts), the operator can make a preliminary observation of the tightness of the bolts in some of the plate holes 501 in the gap space 6, such as whether the nuts are intact and whether the bolts are loose or offset.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vehicle body floor beam connecting structure characterized by comprising: The utility model relates to a bottom beam (1) upper end surface is used for receiving the bottom end of carriage side plate (5) and forms lap joint (2) at the receiving part, first cover (3) is arranged on the bottom beam (1) and has the sheltering part (301) with the side surface of carriage side plate (5) contact, is located above lap joint (2) and is used for sheltering from top to bottom lap joint (2). The first beam hole (101) is arranged on the side wall of the bottom beam (1), the first cover (3) has the first connecting hole (304) corresponding to the first beam hole (101), and the fastener is used for penetrating the first beam hole (101) and the first connecting hole (304) and connecting the bottom beam (1) and the first cover (3). The first cover (3) further has the vertical part (302) arranged on the side wall of the bottom beam (1), the first connecting hole (304) is arranged on the vertical part (302), and the bending part (303) connected with the vertical part (302) and extending normal to the bottom of the bottom beam (1) relative to the vertical part (302) is arranged on the vertical part (302), and the bending part (303) abuts against the bottom wall of the bottom beam (1). The second beam hole (102) is further arranged on the bottom wall of the bottom beam (1), the second connecting hole (305) corresponding to the second beam hole (102) is arranged on the bending part (303), and the fastener is used for penetrating the second beam hole (102) and the second connecting hole (305) and connecting the bottom beam (1) and the first cover (3).

2. The car body sill connection structure according to claim 1, characterized in that The contact part of the sheltering part (301) and the carriage side plate (5) is the sheltering seam (4), and the upper side of the sheltering seam (4) is used for gluing.

3. The car body sill connection structure according to claim 2, characterized in that The bottom beam (1) further has the side support part (103), and the side support part (103) is used for contacting the other side surface of the carriage side plate (5).

4. The car body sill connection structure according to claim 3, characterized in that The bottom of the carriage side plate (5) is provided with the plate hole (501), the side support part (103) is provided with the third beam hole (104) corresponding to the plate hole (501), and the fastener is used for penetrating the plate hole (501) and the third beam hole (104) and connecting the bottom beam (1) and the carriage side plate (5).

5. A truck bed rail connection structure according to any one of claims 1-4, wherein, The sheltering part (301) can shelter one side of the plate hole (501) from top to bottom.

6. The car body sill connection structure according to claim 5, characterized in that The carriage side plate (5) has a plurality of first convex parts (502) and first concave parts (503) connected in sequence, the sheltering part (301) has corresponding second convex parts (3011) and second concave parts (3012) for adapting the side surface of the carriage side plate (5).

7. The car body sill connection structure according to claim 6, characterized in that The vertical part (302) has a spacing space (6) between the first concave part (503) or the first convex part (502).

8. The car body sill connection structure of claim 4, wherein ​ 9. The car body sill connection structure according to claim 8, characterized in that ​

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