A new type of threshold beam structure

Abstract

The utility model discloses a novel threshold beam structure, belonging to the field of vehicle technology, which includes a threshold beam body, and the threshold beam body includes at least two beam tubes that are sleeved together and whose center lines coincide. The beam tube is a hollow tube structure with openings at both ends, and there is a certain gap between two adjacent beam tubes. Positioning structures for fixing each beam tube are provided at both ends of the threshold beam body, and the positioning structures are connected to the ends of each beam tube. The utility model solves the problems of high manufacturing and maintenance costs of existing threshold beams and inconvenient assembly and disassembly of reinforced structures by arranging the threshold beam body into a multi-layer beam tube sleeve manner.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a novel door sill beam structure. Background Art

[0002] The threshold beam refers to a beam connecting the body and chassis under the car door. It is usually used to enhance the strength and rigidity of the body structure, and can also protect the passengers in the car.

[0003] In order to improve its own mechanical strength, the existing threshold beam is generally provided with multiple chambers, and a reinforcement structure is arranged in one or more of the chambers. For example, Chinese patent CN 214240997 U proposes a vehicle body threshold beam, which includes a beam body and a reinforcement member, the beam body has a cavity, and the reinforcement member is a section embedded and fixed in the cavity or multiple sections arranged at intervals. For another example, Chinese patent CN 113998003 A proposes a threshold beam assembly, which includes a threshold beam body and a reinforcement structure, the threshold beam body is a hollow structure formed by extrusion of metal material, and a plurality of body dividing surfaces are arranged in the threshold beam body, and the plurality of body dividing surfaces are used to divide the threshold beam body into a first cavity and a plurality of second cavities along the radial direction of the threshold beam body; the reinforcement structure is a hollow structure formed by extrusion of metal material, and the reinforcement structure is filled in the first cavity, and the radial cross-sectional shape of the reinforcement structure matches the radial cross-sectional shape of the first cavity.

[0004] However, the above-mentioned existing threshold beam structure has the following defects: (1) The threshold beam body is a multi-chamber structure, which makes the manufacturing process of the threshold beam very complicated and the manufacturing cost high; (2) The reinforcing structure is close to the inner wall of the threshold beam body. When the reinforcing structure is disassembled and assembled, the friction resistance between the reinforcing structure and the threshold beam body is large. In addition, multiple positioning holes are required to fix the reinforcing structure, which makes disassembly and assembly inconvenient and affects the disassembly and assembly efficiency; (3) After the threshold beam body is damaged, it usually needs to be replaced as a whole, which has high maintenance costs. Utility Model Content

[0005] The utility model provides a novel threshold beam structure, which solves the problems of high manufacturing and maintenance costs of existing threshold beams and inconvenient assembly and disassembly of the reinforced structure by arranging the threshold beam body into a multi-layer beam tube sleeve connection mode.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] A novel threshold beam structure includes a threshold beam main body, wherein the threshold beam main body includes at least two beam tubes which are nested together and whose center lines coincide with each other, and the beam tubes are hollow tube structures with openings at both ends, and there is a certain gap between two adjacent beam tubes; positioning structures for fixing each beam tube are provided at both ends of the threshold beam main body, and the positioning structures are connected to the ends of each beam tube.

[0008] Furthermore, the gap between two adjacent beam tubes is 1-10 mm.

[0009] Furthermore, the lengths of all beam tubes are the same.

[0010] Furthermore, the positioning structure includes an end cover and at least two connecting rings spaced apart on one side of the end cover, the connecting rings are equal in number to the beam tubes and correspond one to one; the connecting rings are cooperatively connected with the end face openings of the corresponding beam tubes.

[0011] Furthermore, the beam tube located at the outermost layer of the sill beam body is welded and fixed to the end cover.

[0012] As an optional method, the positioning structure includes two groups of symmetrically arranged positioning components; the positioning components include guide rails, guide blocks and locking rods, and the guide rails and guide blocks are arranged between two adjacent beam tubes. The guide rails and guide blocks are respectively installed on different beam tubes and are slidably connected. The locking rod penetrates from the outermost beam tube into the innermost beam tube and penetrates all guide blocks of the same positioning component.

[0013] Furthermore, the length of the guide rail is 30-50 mm.

[0014] Furthermore, the length of the guide block is 30-50 mm.

[0015] Furthermore, the locking rod is a screw rod, which movably passes through the beam tube and is threadedly connected to the guide block.

[0016] As an optional manner, the locking rod is a rivet.

[0017] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0018] 1. The utility model adopts a single-chamber structure by configuring the main body of the threshold beam to be a multi-layer beam tube sleeve, while ensuring strong mechanical strength, thereby reducing the manufacturing cost of the threshold beam.

[0019] 2. The utility model provides a certain gap between two adjacent layers of beam tubes and fixes the beam tubes at both ends through positioning structures, so that the disassembly and assembly between the beam tubes is convenient. In addition, when the threshold beam is damaged, only the damaged beam tube needs to be replaced, which reduces the maintenance cost.

[0020] 3. In the utility model, each beam tube is manufactured on a separate assembly line, and finally a certain number of beam tubes are assembled into a threshold beam through a positioning structure, thereby optimizing the production process of the threshold beam and effectively improving the production efficiency of the threshold beam.

[0021] 4. In the present invention, the lengths of the inner and outer beam tubes are equal or approximately equal. The beam tubes located in the inner layer serve as a reinforcement structure, so that the reinforcement structure of the threshold beam along its length direction is continuous and complete. Compared with the discontinuous and incomplete reinforcement structure in the prior art, the threshold beam proposed by the present invention has better mechanical strength as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the novel threshold beam structure proposed in Example 1 of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the threshold beam body proposed in Example 1 of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning structure proposed in Example 1 of the utility model;

[0025] Figure 4 This is a schematic diagram of the coordination between the positioning structure and the two-layer beam tubes proposed in Example 1 of the utility model;

[0026] Figure 5 This is a schematic diagram of the coordination between the positioning structure and the three-layer beam tube proposed in Example 2 of the utility model;

[0027] Among them, the markings in the accompanying drawings are: 1-sill beam body, 2-beam tube, 3-positioning structure, 4-end cover, 5-connecting ring, 6-positioning assembly, 7-guide rail, 8-guide block, 9-locking rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] like Figure 1-4 As shown, a new type of threshold beam structure includes a threshold beam body 1, and the threshold beam body 1 includes at least two beam tubes 2 that are sleeved together and have overlapping center lines. In this embodiment, there are two beam tubes 2, and the lengths of all beam tubes 2 are the same.

[0031] The beam tube 2 is a hollow tube structure with two ends open, and can be manufactured by an internal high pressure forming process. There is a certain gap between two adjacent beam tubes 2, wherein the gap between two adjacent beam tubes 2 is 1-10 mm, and in this embodiment, the gap is 5 mm.

[0032] Both ends of the sill beam body 1 are provided with positioning structures 3 for fixing each beam tube 2, and the positioning structures 3 are connected to the ends of each beam tube 2. In this embodiment, the positioning structure 3 includes an end cover 4 and at least two connecting rings 5 ​​arranged at intervals on one side of the end cover 4, and the number of connecting rings 5 ​​is equal to that of the beam tube 2 and corresponds one to one, that is, two connecting rings 5 ​​are provided on the end cover 4. The connecting ring 5 is matched and connected with the end surface opening of the corresponding beam tube 2, and is used to position and fix each beam tube 2.

[0033] The beam tube 2 located at the outermost layer of the sill beam body 1 is welded and fixed to the end cover 4 to ensure the connection reliability between the positioning structure 3 and the sill beam body 1. Low temperature welding can be used for welding.

[0034] When assembling the threshold beam, first insert the inner beam tube 2 into the outer beam tube 2, then insert the two positioning structures 3 from both ends of the threshold beam body 1, so that the two connecting rings 5 ​​on the end cover 4 of the positioning structure 3 are respectively matched with the end openings of the two beam tubes 2, and finally, fix them by low temperature welding. If the threshold beam needs to be disassembled, the operation is reversed.

[0035] The utility model adopts a single-chamber structure while ensuring strong mechanical strength by arranging the sill beam body 1 into a multi-layer beam tube 2 sleeved mode, which can reduce the manufacturing cost of the sill beam. The utility model arranges a certain gap between two adjacent layers of beam tubes 2 and fixes the beam tubes 2 at both ends by positioning structures 3, so that the disassembly and assembly between the beam tubes 2 are convenient. In addition, when the sill beam is damaged, only the damaged beam tube 2 needs to be replaced, which reduces the maintenance cost.

[0036] In the utility model, each beam tube 2 is manufactured on a separate assembly line, and finally a certain number of beam tubes 2 are assembled into a threshold beam through the positioning structure 3, thereby optimizing the production process of the threshold beam and effectively improving the production efficiency of the threshold beam.

[0037] In the utility model, the lengths of the inner and outer layer beam tubes 2 are equal or approximately equal. The beam tubes 2 located in the inner layer serve as a reinforcing structure, so that the reinforcing structure of the threshold beam along its length direction is continuous and complete. Compared with the discontinuous and incomplete reinforcing structure in the prior art, the threshold beam proposed by the utility model has better mechanical strength as a whole.

[0038] In addition, in actual application, if necessary, the beam tube 2 can be designed into a special-shaped or curved shape as required, and the tube cross-section can also be arbitrarily designed to meet the design requirements and strength.

[0039] Example 2

[0040] like Figure 5As shown, the difference between this embodiment and embodiment 1 lies in the specific structure of the positioning structure 3 and the number of beam tubes 2. In this embodiment, the positioning structure 3 includes two groups of symmetrically arranged positioning components 6. The positioning components 6 include guide rails 7, guide blocks 8 and locking rods 9. Guide rails 7 and guide blocks 8 are provided between two adjacent beam tubes 2. The guide rails 7 and guide blocks 8 are respectively installed on different beam tubes 2 and are slidably connected. The locking rod 9 penetrates from the outermost beam tube into the innermost beam tube and penetrates all guide blocks 8 of the same positioning component 6.

[0041] In this embodiment, there are three beam tubes 2, namely, the outermost beam tube, the middle beam tube and the innermost beam tube. Two symmetrical guide rails 7 are arranged on the inner side of the outermost beam tube, and two guide blocks 8 are arranged on the outer side of the middle beam tube, which are respectively connected to the two guide rails 7 of the outermost beam tube. Two symmetrical guide rails 7 are arranged on the inner side of the middle beam tube, and two guide blocks 8 are arranged on the outer side of the innermost beam tube, which are respectively connected to the two guide rails 7 of the middle beam tube.

[0042] The length of the guide rail 7 is 30-50 mm, and the length of the guide block 8 is 30-50 mm. In this embodiment, the lengths of the guide rail 7 and the guide block 8 are both 40 mm. In addition, the locking rod 9 is a screw rod, which is movably passed through the beam tube 2 and is threadedly connected to the guide block 8. The guide block 8 has a corresponding threaded hole. When the locking rod 9 is removed by rotation, the locking state is released, and the two adjacent beam tubes 2 can move relative to each other and separate.

[0043] When assembling the threshold beam, first pass the middle beam tube into the outermost beam tube, and then pass the innermost beam tube into the middle beam tube. During the passing process, ensure that the guide block 8 is located at the corresponding guide rail 7 to achieve positioning between the outer beam tube and the inner beam tube. After all beam tubes 2 are assembled, rotate and insert the locking rod 9 to lock the three-layer beam tube 2, thereby achieving the overall fixation of the threshold beam.

[0044] In other embodiments, the specific dimensions of the guide rail 7 and the guide block 8 and the number of beam tubes 2 may also be limited according to actual conditions, and the locking rod 9 may also be a rivet or other structure.

[0045] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A novel threshold beam structure, comprising a threshold beam body, characterized in that: The threshold beam body includes at least two beam tubes which are nested together and whose center lines coincide with each other. The beam tubes are hollow tube structures with openings at both ends, and there is a gap between two adjacent beam tubes. Positioning structures for fixing each beam tube are provided at both ends of the threshold beam body, and the positioning structures are connected to the ends of each beam tube.

2. The novel door sill beam structure according to claim 1, characterized in that: The gap between two adjacent beam tubes is 1-10mm.

3. The novel door sill beam structure according to claim 1 is characterized in that: All beam tubes are the same length.

4. The novel door sill beam structure according to claim 1 is characterized in that: The positioning structure includes an end cover and at least two connecting rings spaced apart on one side of the end cover. The connecting rings are equal in number to the beam tubes and correspond one to one. The connecting rings are matched and connected with the end surface openings of the corresponding beam tubes.

5. The novel door sill beam structure according to claim 4 is characterized in that: The beam tube located at the outermost layer of the sill beam body is welded and fixed to the end cover.

6. The novel door sill beam structure according to claim 1 is characterized in that: The positioning structure includes two groups of symmetrically arranged positioning components; the positioning components include guide rails, guide blocks and locking rods, and the guide rails and guide blocks are arranged between two adjacent beam tubes. The guide rails and guide blocks are respectively installed on different beam tubes and are slidably connected. The locking rod penetrates from the outermost beam tube into the innermost beam tube and penetrates all guide blocks of the same positioning component.

7. The novel door sill beam structure according to claim 6 is characterized in that: The length of the guide rail is 30-50 mm.

8. The novel door sill beam structure according to claim 6 is characterized in that: The length of the guide block is 30-50 mm.

9. The novel door sill beam structure according to claim 6, characterized in that: The locking rod is a screw rod, which movably passes through the beam tube and is threadedly connected with the guide block.

10. The novel door sill beam structure according to claim 6, characterized in that: The locking rod is a rivet.

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