Light passenger car floor

Abstract

This invention discloses a light-duty bus floor. The light-duty bus floor includes, from top to bottom, a floor adhesive layer, a fiberboard, and a floor sheet metal layer stacked on top of each other. The assembly method of the light-duty bus floor includes the following steps: firmly bonding and fixing the floor adhesive layer and fiberboard to the exterior of the vehicle body; welding the floor sheet metal to the bottom support of the vehicle body; and placing the bonded floor adhesive layer and fiberboard onto the floor sheet metal of the vehicle body. The bottom support of the vehicle body includes two longitudinal beams and several transverse beams. By completing the adhesive application and bonding processes of the floor adhesive layer and fiberboard outside the vehicle body assembly area before assembling the entire unit into the vehicle body, the assembly process is simplified, the production cycle is accelerated, the performance requirements of the adhesive are reduced, and the cost of adhesive bonding can be lowered.

Description

Technical Field

[0001] This invention relates to the field of vehicle floor technology, and more specifically to a light passenger vehicle floor. Background Technology

[0002] The floor assembly of a certain light passenger vehicle consists of three parts: floor sheet metal, wood fiberboard, and PVC (Polyvinyl chloride) carpet. The existing assembly steps are as follows:

[0003] Step 1: Lay the wood fiberboard flat on the floor sheet metal, then drill rivet holes, connect the two with rivets, and sweep away the sawdust produced by drilling on the wood fiberboard with a broom;

[0004] Step 2: Apply adhesive to the surface of the laid wood fiberboard and the back of the PVC carpet (non-woven backing). After applying the adhesive, both should be left to stand for a certain period of time.

[0005] Step 3: Glue the PVC carpet to the wood fiberboard and press them together with a wooden block tool, while expelling the air between them.

[0006] The problems with this assembly method are as follows: 1. The assembly process is complex and cumbersome, difficult, and has a slow production cycle, affecting the efficiency of vehicle assembly. For example, ① wood chips are generated during the riveting of the floor sheet metal and wood fiberboard, which need to be manually swept away with a broom; ② At the assembly station, the on-site process of applying glue to the wood fiberboard and PVC carpet on the vehicle body is time-consuming and labor-intensive, affecting the production cycle; ③ The bonding of wood fiberboard and PVC carpet needs to be completed quickly due to the production cycle, which is difficult to do, and the gas between the two is difficult to expel, which can easily cause bulges between them, resulting in quality problems. 2. The glue application and bonding process is completed inside the vehicle body, which may leave irritating odors, and there are also potential environmental hazards at the assembly station. 3. Because the bonding process needs to be completed quickly, the requirements for the adhesive performance are high, resulting in high adhesive costs. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a light passenger vehicle floor that completes the application and bonding process of the floor adhesive layer and fiberboard outside the vehicle assembly area, and then installs it into the vehicle body as a whole. This simplifies the assembly process, speeds up the production cycle, reduces the performance requirements of the adhesive, and can reduce the cost of adhesive.

[0008] To solve the above-mentioned technical problems, the present invention provides a light passenger vehicle floor, comprising a floor adhesive layer, a fiberboard, and a floor sheet metal stacked sequentially from top to bottom. The assembly method of the light passenger vehicle floor includes the following steps: Step 1: On the exterior of the vehicle body, the floor adhesive layer and the fiberboard are bonded and fixed firmly; Step 2: The floor sheet metal is welded to the bottom support of the vehicle body; Step 3: The bonded floor adhesive layer and the fiberboard are placed onto the floor sheet metal of the vehicle body, wherein the bottom support of the vehicle body includes two longitudinal beams and several transverse beams.

[0009] In the aforementioned light passenger vehicle floor, the fiberboard and floor adhesive layer are integrated into a single part on the exterior of the vehicle body. This single part is then transported inside the vehicle body and placed onto the floor sheet metal. Assembly is completed in the vehicle body assembly area. The floor sheet metal and fiberboard are no longer fixed by riveting, reducing the riveting and sawdust cleaning processes. With the fiberboard and floor adhesive layer as a single part, multiple processes such as spraying glue, brushing glue, bonding, and pressing and venting are reduced on the assembly site, greatly simplifying the vehicle body process, increasing production cycle time, and solving the odor and environmental problems associated with on-site glue spraying and brushing processes. In addition, the bonding and bonding process is no longer limited by the on-site production cycle time. It can be pre-bonded and stored for assembly, reducing the performance requirements of the adhesive and lowering the cost of adhesive bonding.

[0010] Preferably, the floor adhesive layer is bonded and fixed to the fiberboard in a production area other than the vehicle body assembly area, such as a dedicated bonding area.

[0011] As an improvement to the light passenger vehicle floor of the present invention, in step one, bonding and fixing the floor adhesive layer to the fiberboard firmly includes: step b1: applying adhesive to the surfaces of the floor adhesive layer and the fiberboard that are to be bonded together; step b2: allowing the floor adhesive layer and the fiberboard to stand for a time t1; step b3: bonding the adhesive surfaces of the floor adhesive layer and the fiberboard together face to face and venting the air between the bonding surfaces; step b4: pressing the bonded floor adhesive layer and the fiberboard together and allowing them to stand for a time t2, so that the floor adhesive layer and the fiberboard are bonded together as a whole.

[0012] Preferably, t1 is 3-6 minutes and t2 is 24-48 hours. The standing time t1 allows the adhesive to penetrate fully, resulting in better bonding; the pressing and standing time t2 can effectively prevent bulging during bonding.

[0013] Furthermore, step b1 includes: applying adhesive to the surface of the fiberboard with a roller tool, and simultaneously spraying adhesive onto the back of the floor adhesive layer 1 with a spray bottle tool.

[0014] Furthermore, in step b3, the method for venting the gas between the bonding surfaces includes: pressing a wooden block against the surface of the floor adhesive layer to ensure that the floor adhesive layer adheres tightly to the fiberboard.

[0015] As another improvement to the light passenger vehicle floor of the present invention, the floor sheet metal has a rectangular main body panel, with a number of central reinforcing ribs provided in the area corresponding to the two longitudinal beams, a beam support reinforcing rib provided at the position corresponding to the horizontal centerline of each of the two longitudinal beams, and side reinforcing ribs provided in the area corresponding to the outer side of the longitudinal beams; the central reinforcing ribs, the beam support reinforcing ribs and the side reinforcing ribs all protrude upwards, and the top ends are flat planes, forming a support plane for supporting the placement of the fiberboard.

[0016] By setting reinforcing ribs on the floor sheet metal, the overall structural strength of the floor sheet metal is greatly increased, meeting the support requirements of the vehicle body's cabin area. In addition, in order to reserve a flat area for welding with the longitudinal beams on the bottom surface of the floor sheet metal, only the beam support reinforcing ribs are stamped out in the area corresponding to the top surface of the longitudinal beams.

[0017] In the above-mentioned technical solution employing central reinforcing ribs, beam bracing reinforcing ribs, and side reinforcing ribs, the central reinforcing ribs, beam bracing reinforcing ribs, and side reinforcing ribs are all arranged along the longitudinal direction of the vehicle body. Several first support pads are provided at the gaps on both sides of the beam bracing reinforcing ribs, and a second support pad is provided at the gap between two central reinforcing ribs. The first support pads and the second support pads are all fixedly connected to the fiberboard to support the fiberboard, and their length direction is along the longitudinal direction of the vehicle body.

[0018] First and second support pads are installed in areas where the reinforcing ribs on the floor sheet metal are sparse. These pads mainly serve a supporting function and provide auxiliary support to prevent deformation.

[0019] Preferably, since the structural dimensions of the floor sheet metal are relatively large, and there is a foot pedal notch and two wheel cover notches on the side of the floor sheet metal, as well as installation holes for seats and pressure strips, the reinforcing ribs can be designed in segments. This creates a spacing between the segments and avoids the reinforcing ribs being too long, which would make manufacturing process control difficult.

[0020] Furthermore, the second support pad is located at the rear end of the fiberboard. This reinforces the support at the rear end of the carriage, making the support more reliable and preventing abnormal noises from passengers stepping on it when getting on and off the vehicle.

[0021] Furthermore, step one also includes: bonding and fixing the first support pad and the second support pad to the surface of the fiberboard away from the floor adhesive layer. By fixing the first support pad and the second support pad to the fiberboard, pre-assembling them together with the floor adhesive layer, and then installing the whole assembly into the vehicle body, the bonding process is completed in one step on the outside of the vehicle body, simplifying the process and speeding up the production cycle.

[0022] Furthermore, the central reinforcing ribs are evenly spaced, and the cross-section of the gap between two adjacent central reinforcing ribs is U-shaped with the top gradually opening, and the bottom width of the U-shape is the same as the width of the second support pad.

[0023] The width design of the second support pad allows it to fit precisely into the gap between the central reinforcing ribs, serving a positioning function. When placing the floor adhesive layer and fiberboard for bonding, the U-shaped cross-section gap opening also acts as a guide, enabling the fiberboard to be quickly placed and positioned on the floor sheet metal, further accelerating the floor assembly cycle.

[0024] In the aforementioned technical solution employing central reinforcing ribs, beam bracing reinforcing ribs, and side reinforcing ribs, several buffer sponge strips are provided on the central reinforcing ribs. The main body of these buffer sponge strips is transversely aligned with the vehicle body, and they are evenly spaced longitudinally. Their primary function is buffering, preventing abnormal noises from the fiberboard contacting the floor sheet metal.

[0025] Furthermore, step one also includes: bonding and fixing the buffer sponge strip to the surface of the fiberboard away from the floor adhesive layer, completing all bonding processes on the outside of the vehicle body to form a whole and improve assembly efficiency.

[0026] In summary, the adoption of the aforementioned light passenger vehicle floor reduces multiple processes such as spraying glue, brushing glue, bonding, pressing and venting at the assembly site, greatly simplifying the body manufacturing process, increasing production cycle time, and solving the odor and environmental problems associated with on-site glue spraying and brushing processes, while also reducing adhesive costs. Attached Figure Description

[0027] In the attached diagram:

[0028] Figure 1 This is a split structural diagram of the light passenger vehicle floor of the present invention.

[0029] Figure 2 This is a diagram of the sheet metal structure of the floor of the light passenger vehicle according to the present invention.

[0030] In the diagram, 1 is the floor adhesive layer; 2 is the fiberboard; 3 is the floor sheet metal; 31 is the central reinforcing rib; 32 is the beam support reinforcing rib; 33 is the side reinforcing rib; 41 is the first support pad; 42 is the second support pad; 5 is the cushioning sponge strip; 61 is the longitudinal beam; 62 is the transverse beam; 71 is the foot pedal notch; 72 is the wheel cover notch. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of the embodiments are for the purpose of helping to understand the present invention, but do not constitute a limitation thereof.

[0032] Example 1

[0033] Figure 1-2 This invention illustrates a lightweight passenger vehicle floor. For example... Figure 1 The floor of this light passenger vehicle comprises, from top to bottom, a floor adhesive layer 1, a fiberboard 2, and a floor sheet metal 3, stacked sequentially. The adhesive layer 1 is commonly known as PVC carpet, also called vinyl flooring or plastic flooring, and is primarily made of PVC material. The fiberboard 2 can be made of wood fiberboard.

[0034] like Figure 2 As shown, the floor sheet metal 3 has a rectangular main panel, and the bottom surface is welded and fixed to the vehicle body support structure: longitudinal beams 61 and transverse beams 62 to support the vehicle floor structure; a foot pedal notch 71 and two wheel cover notches 72 are provided on the side to reserve space for installing foot pedals and wheel covers.

[0035] To enhance the structural strength of the floor sheet metal 3, a reinforcing rib structure is provided on the floor sheet metal 3. To reserve a planar area on the bottom surface of the floor sheet metal 3 for welding with the longitudinal beams 61, only beam support reinforcing ribs 32 are stamped out in the area corresponding to the top surface of the longitudinal beams 61. Specifically, several central reinforcing ribs 31 are provided in the area corresponding to the two longitudinal beams 61, a beam support reinforcing rib 32 is provided at the position corresponding to the horizontal centerline of each of the two longitudinal beams 61, and side reinforcing ribs 33 are provided in the area corresponding to the outer side of the longitudinal beams 61. The central reinforcing ribs 31, beam support reinforcing ribs 32 and side reinforcing ribs 33 all protrude upwards, and their tops are flat planes, forming a support plane for supporting the placement of the fiberboard 2.

[0036] Optionally, depending on the actual installation structure requirements, since the floor sheet metal 3 has a large structural size, a foot pedal notch 71 and two wheel cover notches 72 are opened on the side of the floor sheet metal 3, as well as installation holes for seats and pressure strips, the central reinforcing rib 31, beam support reinforcing rib 32 and side reinforcing rib 33 can all be designed in segments. This creates arrangement gaps between the segments, providing space for various structures and avoiding excessively long reinforcing ribs, which would make manufacturing process control difficult.

[0037] Optionally, the central reinforcing rib 31, the beam support reinforcing rib 32, and the side reinforcing rib 33 are all arranged along the longitudinal direction of the vehicle body. Several first support pads 41 are provided at the gaps on both sides of the beam support reinforcing rib 32, and a second support pad 42 is provided at the gap between two central reinforcing ribs 31. The first support pads 41 and the second support pads 42 are both fixedly connected to the fiberboard 2 to support the fiberboard 2, and their length direction is along the longitudinal direction of the vehicle body.

[0038] Because the longitudinal beam itself has a certain width, the gap between the beam support reinforcing rib 32 and the middle reinforcing ribs 31 and side reinforcing ribs 33 is relatively large. Several first support pads 41 are installed in this gap to provide support in areas where the reinforcing ribs on the floor sheet metal 3 are sparse, thus preventing deformation. A row of first support pads 41 can be installed along the longitudinal direction of the vehicle body on both sides of the beam support reinforcing rib 32.

[0039] Optionally, the second support pad 42 is located at the rear end of the floor sheet metal 3. The rear end of the vehicle body is generally equipped with an upward-opening tailgate. The second support pad 42 strengthens the support at the rear end of the vehicle body, making the support more reliable and preventing abnormal noises caused by passengers stepping on it when getting on and off the vehicle.

[0040] Optionally, the central reinforcing ribs 31 are evenly spaced, and the cross-section of the gap between two adjacent central reinforcing ribs 31 is U-shaped with the top gradually opening. The width of the bottom edge of this U-shape is the same as the width of the second support pad 42. This allows the second support pad 42 to fit precisely into the gap between the central reinforcing ribs 31, serving a positioning function. When the floor adhesive layer 1 and the fiberboard 2 are bonded together, the opening of the U-shaped cross-section gap also serves as a guide, thereby enabling the fiberboard 2 to be quickly placed onto the floor sheet metal 3 and positioned, further accelerating the floor assembly cycle.

[0041] Optionally, several buffer sponge strips 5 are provided on the central reinforcing rib 31. The main body of the buffer sponge strips 5 is arranged laterally along the vehicle body and evenly spaced longitudinally. Their primary function is buffering, preventing abnormal noises from the fiberboard 2 contacting the floor sheet metal 3.

[0042] The assembly method for the light passenger vehicle floor includes the following steps:

[0043] Step S10: On the exterior of the vehicle body, firmly bond and secure the floor adhesive layer 1 to the fiberboard 2. Specifically, this includes:

[0044] Step b1: Apply adhesive to the surfaces where the floor adhesive layer 1 and the fiberboard 2 will adhere to each other. Adhesive can be applied to the surface of the fiberboard 2 using a roller, and simultaneously sprayed onto the non-woven fabric backing of the floor adhesive layer 1 using a spray bottle.

[0045] Step b2: Let the floor adhesive layer 1 and fiberboard 2 stand for time t1. t1 should be 3-6 minutes to allow the adhesive to penetrate fully and achieve a better bonding effect.

[0046] Step b3: Place the adhesive surfaces of the flooring adhesive layer 1 and the fiberboard 2 face to face and expel any air between the surfaces. A wooden block can be used to press down on the surface of the flooring adhesive layer 1 to ensure a tight bond between the flooring adhesive layer 1 and the fiberboard 2.

[0047] Step b4: Press the floor adhesive layer 1 and fiberboard 2 together and let them stand for time t2 to allow them to bond together as a whole. Pressing can be done by placing a heavy object on top of the floor adhesive layer 1. t2 should be 24–48 hours to effectively prevent bulging during bonding.

[0048] It also includes step b5: bonding and fixing the first support pad 41, the second support pad 42 and the cushioning sponge strip 5 to the surface of the fiberboard 2 away from the floor adhesive layer 1.

[0049] All bonding operations are performed outside the vehicle body assembly area. Specifically, the fiberboard 2, floor adhesive layer 1, first support block 41, second support block 42, and cushioning sponge strip 5 are integrated into a single part on the exterior of the vehicle body. This single part is then transported inside the vehicle body and placed onto the floor sheet metal 3, where assembly is completed in the vehicle body assembly area. The floor sheet metal 3 and fiberboard 2 are no longer fixed by riveting, reducing the riveting and sawdust removal processes. With the fiberboard 2 and floor adhesive layer 1 as a single part, multiple processes such as spraying glue, brushing glue, bonding, and pressing / venting are reduced on-site, greatly simplifying the vehicle body manufacturing process, increasing production speed, and solving the odor and environmental problems associated with on-site glue spraying and brushing processes. Furthermore, the bonding process is no longer limited by the on-site production speed; it can be pre-bonded and stored for later assembly, reducing the performance requirements of the adhesive and lowering adhesive costs.

[0050] Step S20: Weld the floor sheet metal 3 to the bottom support of the vehicle body. The bottom support of the vehicle body includes two longitudinal beams 61 and several transverse beams 62. On the bottom surface of the floor sheet metal 3 corresponding to the gaps on both sides of the beam support reinforcing ribs 32, weld the longitudinal beams 61 to the floor sheet metal 3 to form long and straight weld rods, ensuring reliable and firm welding.

[0051] Step S30: Place the bonded assembly of the floor adhesive layer 1 and the fiberboard 2 onto the vehicle's floor sheet metal 3. Multiple second support pads 42 fit precisely into the gaps between the central reinforcing ribs 31, providing guidance and positioning during placement, enabling quick and accurate placement of the bonded assembly and improving production efficiency. After placement, the central reinforcing ribs 31, beam reinforcing ribs 32, side reinforcing ribs 33, first support pads 41, and second support pads 42 provide stable and reliable support; the cushioning sponge strips 5 buffer and reduce noise.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A floor for a light passenger vehicle, characterized in that, The assembly method of the light passenger vehicle floor includes the following steps: floor adhesive layer (1), fiberboard (2) and floor sheet metal (3) stacked sequentially from top to bottom. Step 1: On the exterior of the vehicle body, firmly bond and fix the floor adhesive layer (1) to the fiberboard (2); Step 2: Weld the floor sheet metal (3) to the bottom bracket of the vehicle body; Step 3: Place the adhesive layer (1) and fiberboard (2) together onto the floor sheet metal (3) of the vehicle body. The bottom support of the vehicle body includes two longitudinal beams (61) and several transverse beams (62); The floor sheet metal (3) has a rectangular main board surface. Several central reinforcing ribs (31) are provided in the area corresponding to the two longitudinal beams (61), a beam support reinforcing rib (32) is provided at the position corresponding to the horizontal center line of each of the two longitudinal beams (61), and a side reinforcing rib (33) is provided in the area corresponding to the outer side of the longitudinal beams (61). The central reinforcing rib (31), the beam support reinforcing rib (32) and the side reinforcing rib (33) all protrude upward and the top is a flat plane, forming a support plane for supporting the placement of the fiberboard (2). The central reinforcing rib (31), the beam support reinforcing rib (32), and the side reinforcing rib (33) are all arranged along the longitudinal direction of the vehicle body. Several first support pads (41) are provided at the gaps on both sides of the beam support reinforcing rib (32), and a second support pad (42) is provided at the gap between two central reinforcing ribs (31). The first support pads (41) and the second support pads (42) are both fixedly connected to the fiberboard (2), and their length direction is along the longitudinal direction of the vehicle body. The second support pad (42) is located at the tail end of the fiberboard (2); The central reinforcing ribs (31) are evenly spaced, and the cross-section of the gap between two adjacent central reinforcing ribs (31) is U-shaped with the top gradually opening. The width of the bottom edge of the U-shaped gap is the same as the width of the second support pad (42). The adhesive layer (1) and the fiberboard (2) are bonded together and placed on the floor sheet metal (3) of the vehicle body. The multiple second support pads (42) can be placed in the gap between the central reinforcing ribs (31). They have a guiding and positioning function when placed. After placement, the second support pads (42) play a supporting role.

2. The light passenger vehicle floor according to claim 1, characterized in that, In step one, firmly bonding and fixing the floor adhesive layer (1) to the fiberboard (2) includes: Step b1: Apply glue to the surfaces where the floor adhesive layer (1) and the fiberboard (2) are to be bonded together; Step b2: Let the floor adhesive layer (1) and fiberboard (2) stand for time t1 respectively; Step b3: Place the adhesive surfaces of the floor adhesive layer (1) and the fiberboard (2) face to face and remove the air between the adhesive surfaces; Step b4: Press the bonded floor adhesive layer (1) and fiberboard (2) together and let them stand for time t2 to bond the floor adhesive layer (1) and fiberboard (2) into a whole.

3. The light passenger vehicle floor according to claim 2, characterized in that, In step b3, the method for venting the gas between the bonding surfaces includes: pressing a wooden block against the surface of the floor adhesive layer (1) to make the floor adhesive layer (1) and the fiberboard (2) adhere tightly to each other.

4. The light passenger vehicle floor according to claim 1, characterized in that, Step one further includes: bonding and fixing the first support pad (41) and the second support pad (42) to the surface of the fiberboard (2) away from the floor adhesive layer (1).

5. A light passenger vehicle floor according to claim 1, characterized in that, The central reinforcing rib (31) is provided with several buffer sponge strips (5), the main body of the buffer sponge strips (5) is arranged horizontally along the vehicle body and evenly spaced in the longitudinal direction of the vehicle body.

6. The light passenger vehicle floor according to claim 5, characterized in that, Step one further includes: bonding and fixing the cushioning sponge strip (5) to the surface of the fiberboard (2) away from the floor adhesive layer (1).

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