Floor assembly, frame and vehicle

Abstract

The utility model relates to the field of vehicles, in particular to a floor assembly, a frame and a vehicle. The frame comprises a floor assembly and a longitudinal beam assembly which are detachably and fixedly connected together, the floor assembly comprises a floor and a plurality of floor cross beams fixed to the floor, the floor cross beams are arranged at intervals in the front-back direction, and a connecting beam is fixedly arranged between every two adjacent floor cross beams; the floor cross beam is provided with a connecting hole used for being connected with the longitudinal beam after the floor assembly is assembled. Due to the fact that the floor cross beams are arranged at intervals in the front-back direction, and the connecting beams are fixedly arranged between every two adjacent floor cross beams, the floor assembly can be conveniently connected into a whole through the connecting beams. The floor assembly can form a stable integral structure through the connecting beams, and therefore the problems that in the prior art, when the floor cross beams and the longitudinal beams are detachably connected, due to the fact that the multiple floor cross beams are not effectively connected, the structural strength of a vehicle frame is low, and the NVH performance of a vehicle is affected are solved.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and in particular to a floor assembly, a frame and a vehicle. Background Art

[0002] Usually, vehicles such as buses have a frame, and the subsequent installation of vehicles is assembled based on the frame. The strength of the frame directly determines the subsequent performance and NVH performance of the vehicle. The frame includes a longitudinal beam arranged along the front and rear directions of the vehicle, and other components are arranged on the longitudinal beam to form a longitudinal beam assembly, and a floor assembly is arranged on the longitudinal beam. Usually, the floor assembly includes a floor crossbeam arranged above the longitudinal beam and a sheet metal part fixed on the floor crossbeam to form a floor, and the floor crossbeam plays a role in strengthening and supporting the floor. The floor crossbeam is arranged perpendicular to the longitudinal beam. Due to the large length of the bus, a plurality of parallel floor crossbeams are usually arranged.

[0003] Multiple floor cross beams are connected together by longitudinal beams. However, the overall length of the longitudinal beams is relatively large. There is no effective support between the multiple floor cross beams except the longitudinal beams. When the floor cross beams and the longitudinal beams are welded together, the frame is relatively connected as a whole. However, in the prior art, there are still bolts or other detachable connection methods between the floor cross beams and the longitudinal beams. In this case, the multiple floor cross beams are relatively loose, resulting in a reduction in the frame strength of the vehicle, which correspondingly affects the NVH performance of the vehicle. Utility Model Content

[0004] The purpose of the utility model is to provide a floor assembly for solving the problem in the prior art that when the floor cross beams and the longitudinal beams are detachably connected, the lack of effective connection between the multiple floor cross beams leads to low frame structure strength and affects the NVH performance of the vehicle; the purpose of the utility model is also to provide a frame for solving the above-mentioned technical problems; the purpose of the utility model is also to provide a vehicle for solving the above-mentioned technical problems.

[0005] In order to achieve the above purpose, the floor assembly in the utility model adopts the following technical solutions:

[0006] A floor assembly comprises a floor and a plurality of floor cross beams fixed on the floor, wherein the plurality of floor cross beams are arranged at intervals in a front-to-rear direction, a connecting beam is fixedly arranged between two adjacent floor cross beams, and the floor cross beams are provided with connecting holes for connecting with longitudinal beams after the floor assembly is assembled.

[0007] Furthermore, the floor cross beam located at the frontmost side is used to be arranged close to the powertrain to form an end cross beam, there are at least two floor cross beams on the rear side of the end cross beam and both constitute rear cross beams, and the number of connecting beams between any two adjacent rear cross beams is greater than the number of connecting beams between the end cross beam and adjacent rear cross beams.

[0008] Furthermore, there are two connecting beams between any two adjacent rear cross beams, and the connecting beams are symmetrically arranged in an "eight" shape.

[0009] Furthermore, the connecting beams between the middle rear cross beam and the rear cross beams on the front and rear sides of the three adjacent rear cross beams are symmetrically arranged.

[0010] Furthermore, the symmetry axes of the connecting beams symmetrically arranged in an "eight" shape are offset relative to the center line in the vehicle width direction.

[0011] The beneficial effects of the floor assembly in the utility model are as follows: the utility model improves the existing floor assembly, and facilitates the assembly of the floor by setting floor crossbeams and the floor; since the floor crossbeams are arranged at intervals along the front-to-back direction, a connecting beam is fixedly provided between two adjacent floor crossbeams, so that the floor assembly can be connected into a whole through the connecting beam; by providing connecting holes for connecting with the longitudinal beams on the floor crossbeams, it is convenient to assemble the frame after the installation of the floor is completed, that is, the floor crossbeams are no longer fixedly connected by the longitudinal beams, but rely on the connecting beams to make the floor assembly itself form a stable integral structure, thereby solving the problem of low frame structure strength and affecting vehicle NVH performance due to lack of effective connection between multiple floor crossbeams when the floor crossbeams and the longitudinal beams are detachably connected in the prior art.

[0012] In order to achieve the above purpose, the frame of the utility model adopts the following technical solutions:

[0013] A vehicle frame includes a floor assembly and a longitudinal beam assembly that are detachably fixed together, the longitudinal beam assembly includes a longitudinal beam extending in the front-to-back direction, the longitudinal beam is provided with a connection structure for being fixedly connected to the floor cross beam through a fastener, wherein the floor assembly includes a floor and a plurality of floor cross beams fixed to the floor, the plurality of floor cross beams are arranged at intervals in the front-to-back direction, a connection beam is fixedly provided between two adjacent floor cross beams, the floor cross beam is provided with a connection hole for being connected to the longitudinal beam after the floor assembly is assembled, and the fastener is fixedly connected to the floor cross beam through the connection hole.

[0014] Furthermore, the connecting structure is a mounting bracket fixed on the longitudinal beam, and the mounting bracket includes a first mounting plate arranged perpendicularly to each other for being fitted and fixed to the longitudinal beam and a second mounting plate for being fitted and fixed to the floor cross beam, wherein a first mounting hole is provided on the first mounting plate, and a second mounting hole is provided on the second mounting plate.

[0015] Furthermore, a reinforcing plate is connected between the first mounting plate and the second mounting plate.

[0016] Furthermore, at least two second mounting holes are provided, and the plurality of second mounting holes are located on the same straight line. A reinforcing rib is provided on the side of the second mounting plate facing away from the floor cross beam and between two adjacent second mounting holes. The reinforcing plates have two reinforcing ribs, which are located between the two reinforcing plates and fixedly connected to the reinforcing plates.

[0017] Furthermore, the floor cross beam located at the frontmost side is used to be arranged close to the powertrain to form an end cross beam, there are at least two floor cross beams on the rear side of the end cross beam and both constitute rear cross beams, and the number of connecting beams between any two adjacent rear cross beams is greater than the number of connecting beams between the end cross beam and adjacent rear cross beams.

[0018] Furthermore, there are two connecting beams between any two adjacent rear cross beams, and the connecting beams are symmetrically arranged in an "eight" shape.

[0019] Furthermore, the connecting beams between the middle rear cross beam and the rear cross beams on the front and rear sides of the three adjacent rear cross beams are symmetrically arranged.

[0020] Furthermore, the symmetry axes of the connecting beams symmetrically arranged in an "eight" shape are offset relative to the center line in the vehicle width direction.

[0021] The beneficial effects of the vehicle frame of the utility model are as follows: the utility model improves the existing vehicle frame, and by arranging a connection structure on the longitudinal beam and a connection hole on the floor cross beam, it is convenient to connect the longitudinal beam and the floor cross beam into one piece through fasteners, that is, in the process of processing and manufacturing, it is not necessary to weld the longitudinal beam and the floor cross beam first, but the longitudinal beam and the floor cross beam are connected after the floor assembly and the longitudinal beam assembly are formed; the floor is convenient to be assembled by arranging the floor cross beam and the floor; because the floor cross beams are arranged at intervals along the front-back direction, a connection beam is fixedly arranged between two adjacent floor cross beams, so that the floor assembly is convenient to be connected into a whole through the connection beam; by arranging the connection hole for connecting with the longitudinal beam on the floor cross beam, it is convenient to assemble the frame after the installation of the floor is completed, that is, the floor cross beams are no longer fixedly connected by the longitudinal beam, but rely on the connection beam so that the floor assembly itself can form a stable integral structure, thereby solving the problem of low frame structure strength and affecting vehicle NVH performance caused by lack of effective connection between multiple floor cross beams when the floor cross beam and the longitudinal beam are detachably connected in the prior art.

[0022] In order to achieve the above-mentioned purpose, the vehicle in the utility model adopts the following technical solutions:

[0023] A vehicle comprises a frame, wherein the frame comprises a floor assembly and a longitudinal beam assembly which are detachably fixedly connected together, the longitudinal beam assembly comprises a longitudinal beam extending in a front-to-rear direction, the longitudinal beam is provided with a connection structure for being fixedly connected to a floor cross beam via a fastener, wherein the floor assembly comprises a floor and a plurality of floor cross beams fixed to the floor, the plurality of floor cross beams are arranged at intervals in the front-to-rear direction, a connection beam is fixedly provided between two adjacent floor cross beams, the floor cross beam is provided with a connection hole for being connected to the longitudinal beam after the floor assembly is assembled, and the fastener is fixedly connected to the floor cross beam via the connection hole.

[0024] Furthermore, the connecting structure is a mounting bracket fixed on the longitudinal beam, and the mounting bracket includes a first mounting plate arranged perpendicularly to each other for being fitted and fixed to the longitudinal beam and a second mounting plate for being fitted and fixed to the floor cross beam, wherein a first mounting hole is provided on the first mounting plate, and a second mounting hole is provided on the second mounting plate.

[0025] Furthermore, a reinforcing plate is connected between the first mounting plate and the second mounting plate.

[0026] Furthermore, at least two second mounting holes are provided, and the plurality of second mounting holes are located on the same straight line. A reinforcing rib is provided on the side of the second mounting plate facing away from the floor cross beam and between two adjacent second mounting holes. The reinforcing plates have two reinforcing ribs, which are located between the two reinforcing plates and fixedly connected to the reinforcing plates.

[0027] Furthermore, the floor cross beam located at the frontmost side is used to be arranged close to the powertrain to form an end cross beam, there are at least two floor cross beams on the rear side of the end cross beam and both constitute rear cross beams, and the number of connecting beams between any two adjacent rear cross beams is greater than the number of connecting beams between the end cross beam and adjacent rear cross beams.

[0028] Furthermore, there are two connecting beams between any two adjacent rear cross beams, and the connecting beams are symmetrically arranged in an "eight" shape.

[0029] Furthermore, the connecting beams between the middle rear cross beam and the rear cross beams on the front and rear sides of the three adjacent rear cross beams are symmetrically arranged.

[0030] Furthermore, the symmetry axes of the connecting beams symmetrically arranged in an "eight" shape are offset relative to the center line in the vehicle width direction.

[0031] The beneficial effects of the vehicle in the utility model are as follows: the utility model improves the existing vehicle, and by providing a connection structure on the longitudinal beam and a connection hole on the floor cross beam, it is convenient to connect the longitudinal beam and the floor cross beam into one piece through fasteners, that is, in the process of processing and manufacturing, it is not necessary to weld the longitudinal beam and the floor cross beam first, but the longitudinal beam and the floor cross beam are connected after the floor assembly and the longitudinal beam assembly are formed; the floor is convenient to assemble by providing the floor cross beam and the floor; because the floor cross beams are arranged at intervals along the front-back direction, a connection beam is fixedly provided between two adjacent floor cross beams, so that the floor assembly is convenient to connect into a whole through the connection beam; by providing a connection hole for connecting with the longitudinal beam on the floor cross beam, it is convenient to assemble the frame after the installation of the floor is completed, that is, the floor cross beams are no longer fixedly connected by the longitudinal beam, but rely on the connection beam so that the floor assembly itself can form a stable integral structure, thereby solving the problem of low frame structure strength and affecting vehicle NVH performance caused by lack of effective connection between multiple floor cross beams when the floor cross beam and the longitudinal beam are detachably connected in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a frame in the utility model;

[0033] Figure 2 A top view of an embodiment of a frame of the utility model;

[0034] Figure 3 A bottom view of an embodiment of a frame of the utility model;

[0035] Figure 4 It is a structural schematic diagram of a floor beam and a connecting beam of an embodiment of a vehicle frame in the utility model;

[0036] Figure 5 It is an axonometric view of the mounting bracket in the embodiment of the vehicle frame of the utility model;

[0037] Figure 6 It is an axonometric view of another perspective of the mounting bracket in the embodiment of the vehicle frame of the utility model;

[0038] Figure 7 It is a partial enlarged view of the A part in the embodiment of the frame of the utility model;

[0039] Figure 8 It is a structural schematic diagram of a suspension joist in an embodiment of a vehicle frame of the utility model;

[0040] Fig. 9 It is a schematic structural diagram of the first reinforcing cross beam in an embodiment of the vehicle frame of the present utility model.

[0041] In the figure: 1. longitudinal beam; 2. floor beam; 21. end beam; 22. rear beam; 3. connecting beam; 4. mounting bracket; 41. first mounting plate; 42. second mounting plate; 43. reinforcing plate; 44. reinforcing rib; 5. suspension joist; 51. bent steel plate; 52. bent profile; 61. first reinforcing beam; 62. second reinforcing beam. DETAILED DESCRIPTION

[0042] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0043] The vehicle frame of the utility model comprises a longitudinal beam and a floor beam, wherein the floor beam and the longitudinal beam are fixedly connected by a connecting structure, and in order to connect a plurality of floor beams into a whole without reducing rigidity, a connecting beam is also provided to fixedly connect two adjacent floor beams.

[0044] In the embodiment of the frame of the utility model:

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the vehicle frame includes a floor assembly and a longitudinal beam assembly that are manufactured separately and fixedly connected together. The floor assembly includes a floor and a plurality of floor cross beams 2 fixed to the floor. The plurality of floor cross beams 2 are arranged at intervals along the front-to-back direction. The longitudinal beam assembly includes a longitudinal beam 1 extending along the front-to-back direction. The floor cross beam 2 is arranged above the longitudinal beam 1, and different floor cross beams 2 are located in the same plane. The floor cross beam 2 is arranged separately from the longitudinal beam 1. In order to facilitate the connection between the floor cross beam 2 and the longitudinal beam 1, a connecting structure for fixing the floor cross beam 2 with a fastener is provided on the longitudinal beam 1, and a connecting hole for the fastener to pass through to connect the longitudinal beam 1 and the floor cross beam 2 together is provided on the floor cross beam 2. In this embodiment, the connecting structure is a mounting bracket 4. Of course, in other embodiments, the connecting structure may also be a mounting hole on the longitudinal beam 1.

[0046] The floor cross beam 2 and the mounting bracket 4, as well as the longitudinal beam 1 and the mounting bracket 4, are fixedly connected by riveting. At this time, the rigidity between two adjacent floor cross beams 2 will be weakened, and the frame may jump when encountering a bumpy road section. Therefore, a connecting beam 3 is further provided between two adjacent floor cross beams 2, and the two ends of the connecting beam 3 are respectively welded to the floor cross beam 2. Of course, in other embodiments, a connecting ear plate can also be provided at the end of the connecting beam 3, and the connecting beam 3 and the floor cross beam 2 are connected into a whole by screwing or riveting.

[0047] Specifically, Figure 5 , Figure 6 and Figure 7As shown, the mounting bracket 4 includes a first mounting plate 41 for fitting with the longitudinal beam 1 and a second mounting plate 42 for fitting with the floor cross beam 2, which are arranged perpendicular to each other. The use of the mounting plate facilitates the formation of a larger contact surface between the longitudinal beam 1 and the floor cross beam 2, and facilitates the avoidance of force concentration. For the convenience of connection, a first mounting hole is provided on the first mounting plate 41, and a second mounting hole is provided on the second mounting plate 42. Fasteners such as pins are passed through the first mounting plate 41 to facilitate the connection and fixation of the mounting bracket 4 and the longitudinal beam 1, and fasteners such as pins are passed through the second mounting hole to facilitate the connection and fixation of the mounting bracket 4 and the floor cross beam 2, thereby facilitating the fixed connection of the mounting bracket 4, the floor cross beam 2 and the longitudinal beam 1.

[0048] The connection and fixation of the floor cross beam 2 and the longitudinal beam 1 requires a large torque, so the first mounting hole and the second mounting hole are often provided with multiple. Specifically, multiple first mounting holes arranged vertically are respectively provided at the front and rear ends of the first mounting plate 41, and multiple second mounting holes arranged horizontally and transversely are provided in the middle of the second mounting plate 42. A reinforcing plate 43 is also provided between the first mounting plate 41 and the second mounting plate 42. There are two reinforcing plates 43, which are respectively located on both sides of the first mounting hole and the second mounting hole. The existence of the mounting hole will reduce the strength of the second mounting plate 42, so a reinforcing rib 44 is provided on the side of the second mounting plate 42 facing away from the floor cross beam 2 and between two adjacent second mounting holes. The reinforcing rib 44 is located between the two reinforcing plates 43 and is fixedly connected to the reinforcing rib 44. Of course, in other embodiments, the reinforcing plate 43 can also be provided only on one side of the reinforcing rib 44. Alternatively, in other embodiments, the reinforcing plate 43 or the reinforcing rib 44 may no longer be provided.

[0049] like Figure 1 and Figure 4 As shown, the longitudinal beam 1 is not only provided with components such as the floor, but also with a power assembly such as an engine or a motor. The floor cross beam 2 includes a rear cross beam 22 and an end cross beam 21 located at the front and close to the power assembly when in use. The end cross beam 21 is provided with a single connecting beam 3 between the end cross beam 21 and the rear cross beam 22. Two connecting beams 3 are provided between two adjacent rear cross beams 22. The connecting beams 3 between two adjacent rear cross beams 22 each have two and are symmetrically arranged in an "eight" shape. Of course, in other embodiments, the connecting beams 3 between two adjacent rear cross beams 22 each have two and are arranged in parallel.

[0050] The connecting beams 3 between the middle rear cross beam 22 and the rear cross beams 22 on both sides of the front and rear sides of the three adjacent rear cross beams 22 are symmetrically arranged, that is, the connecting beams 3 are butted end to end on the rear cross beam 22, which can further enhance the rigidity. Of course, in other embodiments, the connecting beams 3 on both sides of the middle rear cross beam 22 may not be arranged symmetrically with respect to the rear cross beam 22, such as both are arranged in an "eight" shape with the same orientation. In the arrangement of the vehicle, since the weight of the vehicle may be different, the strength requirements required for different parts may be different, such as in a row of seats, there are three seats arranged on one side and two seats arranged on the other side. Therefore, the symmetry axis of the connecting beam 3 arranged in an "eight" shape on the rear cross beam 22 is offset relative to the center line of the width direction of the vehicle, so that the load that can be borne by the offset side can be larger. Of course, for a vehicle with a relatively balanced weight distribution, the symmetry axis of the connecting beam 3 on the rear cross beam 22 can be arranged on the center line of the width direction of the vehicle.

[0051] like Figure 1 , Figure 3 and Fig. 9 As shown, in order to further strengthen the structure, a reinforcing crossbeam is further provided between the longitudinal beams 1 and below the connecting beam 3. The reinforcing crossbeam includes a first reinforcing crossbeam 61 located at the front side and a second reinforcing crossbeam 62 located at the rear side. The first reinforcing crossbeam 61 is located at the bottom of the rear crossbeam 22, and the second reinforcing crossbeam 62 is located at the second reinforcing crossbeam 62 at the end. The connection strength between the longitudinal beams 1 is strengthened by two sets of reinforcing crossbeams. The first reinforcing crossbeam 61 and the second reinforcing crossbeam 62 are both box-type structures made of metal plates. Each reinforcing crossbeam is composed of a front sealing plate, a rear sealing plate, an upper wing plate and a lower wing plate. Connecting plates for fixed connection with the longitudinal beam 1 are provided at both ends of the reinforcing beam. Of course, in other embodiments, the reinforcing beam can also be set as an I-beam, and connecting plates are welded at both ends of the I-beam to facilitate connection with the longitudinal beam 1. Alternatively, in other embodiments, if the strength is sufficient, the reinforcing crossbeam may no longer be provided.

[0052] like Figure 1 and Figure 8 As shown, in order to install the power assembly, a suspension joist 5 is further arranged between the two longitudinal beams 1. The suspension joist 5 is U-shaped and includes bent steel plates 51 at both ends and a bent profile 52 in the middle. The arrangement of the bent profile 52 facilitates the provision of space for the arrangement of the engine or motor, and the arrangement of the bent steel plate 51 facilitates the connection of the suspension joist 5 to the two longitudinal beams 1. During installation, the bent steel plates 51 at both ends of the suspension bracket are connected to the lower surface of the longitudinal beam 1.

[0053] In the process of assembling and manufacturing the vehicle frame, firstly, the floor crossbeam 2 and the floor and other components are assembled together, the longitudinal beam 1 and the reinforcing crossbeam and the suspension joist 5 are connected together to form a longitudinal beam assembly and a floor assembly respectively, and finally the floor crossbeam 2 is assembled on the longitudinal beam 1. In the process of assembly, the mounting bracket 4 can be riveted on the longitudinal beam 1 first, and finally the floor crossbeam 2 and the longitudinal beam 1 need to be fixed together by riveting. When riveting, the installation can be performed directly from top to bottom above the floor.

[0054] In the embodiment of the floor assembly of the present invention: the structure of the floor assembly in this embodiment is the same as the structure of the floor assembly in the embodiment of the above-mentioned frame, and will not be repeated here.

[0055] In an embodiment of a vehicle of the present utility model: the vehicle in this embodiment includes a frame, wherein the frame has the same structure as in the above-mentioned embodiment of the frame, and will not be repeated here.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A floor assembly, comprising a floor and a plurality of floor beams fixed to the floor, wherein the plurality of floor beams are arranged at intervals along a front-to-rear direction, and characterized in that: A connecting beam is fixedly arranged between two adjacent floor cross beams, and a connecting hole for connecting with the longitudinal beam after the floor assembly is assembled is arranged on the floor cross beam.

2. The floor assembly according to claim 1, characterized in that: The floor cross beam located at the frontmost side is used to be arranged close to the powertrain to form an end cross beam. There are at least two floor cross beams on the rear side of the end cross beam, and both constitute rear cross beams. The number of connecting beams between any two adjacent rear cross beams is greater than the number of connecting beams between the end cross beam and the adjacent rear cross beams.

3. The floor assembly according to claim 2, characterized in that: There are two connecting beams between any two adjacent rear side cross beams, and they are symmetrically arranged in an "eight" shape.

4. The floor assembly according to claim 3, characterized in that: The connecting beams between the middle rear side cross beam and the rear side cross beams at the front and rear sides of the three adjacent rear side cross beams are symmetrically arranged.

5. The floor assembly according to claim 3, characterized in that: The symmetry axes of the connecting beams symmetrically arranged in an "eight" shape are offset relative to the center line in the vehicle width direction.

6. A vehicle frame, comprising a floor assembly and a longitudinal beam assembly which are detachably fixedly connected together, wherein the longitudinal beam assembly comprises a longitudinal beam extending in a front-rear direction, characterized in that: A connecting structure for fixedly connecting with the floor crossbeam via fasteners is provided on the longitudinal beam, and the floor assembly is the same as the floor assembly described in any one of claims 1 to 5, and the fasteners are fixedly connected with the floor crossbeam via connecting holes.

7. The frame according to claim 6, characterized in that: The connecting structure is a mounting bracket fixed on the longitudinal beam, and the mounting bracket includes a first mounting plate arranged perpendicularly to each other for being fixed to the longitudinal beam and a second mounting plate for being fixed to the floor cross beam. The first mounting plate is provided with a first mounting hole, and the second mounting plate is provided with a second mounting hole.

8. The frame according to claim 7, characterized in that: A reinforcing plate is connected between the first mounting plate and the second mounting plate.

9. The frame according to claim 8, characterized in that: There are at least two second mounting holes, and the multiple second mounting holes are located in the same straight line. A reinforcing rib is provided on the side of the second mounting plate facing away from the floor beam and between two adjacent second mounting holes. There are two reinforcing plates, and the reinforcing rib is located between the two reinforcing plates and fixedly connected to the reinforcing plates.

10. A vehicle, comprising a frame, characterized in that: The frame is the same as the frame described in any one of claims 6-9.

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