Bridge Structure of Electric Vehicle Charging Device Base and Processing and Installation Method

Abstract

The base bridge structure of an electric vehicle charging device includes a bridge ear and a bridge hook. The bridge ear and the base housing form a downward cavity, and the lower part of the bridge hook is embedded into the cavity of the bridge ear to form an interlocking connection. There are multiple groups of bridge structures in the base. Each group of small bridge structures is independent and inseparable. The small functions of multiple groups of bridge structures realize the large functions of the overall bridge structure. The modular structure design is simple, economical and practical, safe and convenient, with low maintenance costs, good universality of spare parts, saving consumables and maintenance man-hours, easy control of processing quality, low processing costs, low installation labor intensity, simple and convenient debugging, and easy guarantee of debugging quality. It has great popularization and application space.

Description

Technical Field

[0001] The present invention relates to the cross - field of new energy vehicles, mechanical manufacturing, and mechanical and electrical installation, specifically to the bridge - crossing structure of the base of an electric vehicle charging device and its processing and installation method. Background Art

[0002] For the base of an electric vehicle charging device, in order to prevent the base from loosening and detaching from the ground due to external forces, it is necessary to make the bridge - crossing structure generate a preset prestress and failure force to protect the base. In the product structure of the currently published invention patent "Bridge - crossing of the Base of an Electric Vehicle Charging Device and Quality Control" (ZL202010069500.6), in order to make a batch of bridge - crossing structures have equal prestress and maximum failure force, both the invented bridge - crossing structure and quality control are complex, and subsequent processing, production, installation, and debugging also become complex. As a result, the overall processing cost of the bridge - crossing structure is increased, and the overall debugging difficulty for installers is also increased. It is necessary to design a simple, concise, safe, economical, and more convenient bridge - crossing structure for processing and installation. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a bridge - crossing structure of the base of an electric vehicle charging device and its production, processing, installation, and debugging methods to solve the above - mentioned drawbacks in the background art.

[0004] The technical problem solved by the present invention is achieved by the following technical solutions:

[0005] The bridge - crossing structure of the base of an electric vehicle charging device includes a bridge - crossing ear and a bridge - crossing hook. The bridge - crossing ear and the base housing form a downward cavity, and the lower part of the bridge - crossing hook is embedded into the cavity of the bridge - crossing ear to form an interlocking connection. There are multiple groups of bridge - crossing structures in the base.

[0006] In the present invention, there are multiple groups of the bridge - crossing structures in the base, which are evenly distributed in the base.

[0007] In the present invention, the opening of the cavity of the bridge - crossing ear faces downward, and the lower end of the bridge - crossing hook faces upward and is embedded into the cavity of the bridge - crossing ear. The bridge - crossing ear and the bridge - crossing hook are connected in an interlocking manner.

[0008] In the present invention, when the bridge - crossing hook is not stressed, it slides freely on the engaging surface with the bridge - crossing ear. When the bridge - crossing hook is stressed, it fits tightly with the engaging surface of the bridge - crossing ear. When the force on the bridge - crossing hook is within the set safety range value, the engaging surface fits tightly and there is no looseness. After exceeding the set safety range value, the engagement between the bridge - crossing hook and the bridge - crossing ear begins to gradually slip until the engaging surface is completely separated and the engagement fails.

[0009] In the present invention, the failure of the engagement between the bridge - crossing hook and the bridge - crossing ear is achieved through the deformation of the material of any one of the components under stress, while the other component remains intact.

[0010] In the present invention, the maximum value of the safety range of the bridging hook is the maximum failure force of the bridging hook and the bridging ear, which is determined by the material and deflection of the bridging hook and the bridging ear, the material thickness and width, and is obtained through the material mechanics design calculation of the materials selected for the bridging hook and the bridging ear in advance.

[0011] The bridging structure of the present invention is simple and practical, has good functions, is safe and economical, has unified installation, is convenient for maintenance, and saves consumables and working hours.

[0012] The second objective (processing) of the present invention is achieved through the following process:

[0013] In the present invention, the cavity of the bridging ear is integrally processed with the casting of the base and the partial hollowing of the base.

[0014] In the present invention, the cavity of the bridging ear is formed by installing a split external hanging component inside the base.

[0015] In the present invention, the split external hanging component of the bridging ear and the bridging hook component are formed into the required component structures by a special mold installed on a stamping machine in one stamping.

[0016] This processing process flow is simple, the processing quality is easy to control, and the batch processing cost is low.

[0017] The third objective (installation) of the present invention is achieved through the following steps:

[0018] Step 1: According to the maximum failure force required by the bridging structure, select bridging hook components and external hanging components of the bridging ear with different standard thicknesses and widths. It is not necessary to select the bridging ear integrally processed with the base. For the bridging structures within the same base, only one set of model bridging ear components and bridging hook components can be selected.

[0019] Step 2: Place the bridging hook through the installation hole of the base cover plate, let the bottom end of the bridging hook embed into the cavity of the bridging ear, let the upper end of the bridging hook be connected to the cover plate through a screw, with the nut below the upper end of the bridging hook, and manually tighten the screw and the nut to make the bridging hook not fall off in the bridging ear.

[0020] Step 3: Repeat Step 2 to pre-install all the bridging hooks in the base.

[0021] Step 4: Fix the nut through the installation hole of the base cover plate, and tighten the screw with a torque wrench at the upper end of the cover plate to make each set of bridging hooks fit tightly with the bridging ear, and symmetrically tighten each set of bridging structures in the base and reach the designed prestress value.

[0022] Step 5: After one set or multiple sets of bridging structures in the base fail, the failed bridging ear components or bridging hook components need to be replaced. After replacement, check the other sets of bridging structures and calibrate them all according to the design value with a torque wrench.

[0023] The installation and debugging steps are simple. A torque wrench and a fixed wrench are used to standardize the installation and debugging quality, which is easy to operate and reduces the difficulty and labor intensity of the debugging personnel.

[0024] Beneficial effects: The base bridge structure of the electric vehicle charging device described in the present invention realizes the large functions of the overall bridge structure through the small functions of multiple groups of bridge structures. Each group of small bridge structures is independent and inseparable. By prefabricating bridge ears and bridge hooks with different material deflections, thicknesses, and widths, standardized products of various failure force bridge structures with stability and uniformity are manufactured. The modular structure design is simple, economical and practical, safe and convenient, with low maintenance costs, good spare part versatility, saving consumables and maintenance man-hours, and having great promotion and application space.

[0025] The present invention can manufacture the bridge structure through the above processing technology. The process flow is simple, the processing quality is easy to control, and the batch processing cost is low. Through the above installation and debugging steps, a torque wrench and a fixed wrench can achieve standardized debugging of on-site construction, with low labor intensity and easy guarantee of installation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : is the center line sectional view of the bridge structure of the preferred embodiment of the present invention.

[0027] Wherein: 1a, bridge ear; 1b, bridge ear cavity; 1c, connecting screw; 2a, bridge hook; 2b, bottom end of the bridge hook; 2c, upper end of the bridge hook; 3a, cover plate; 3b, cover plate mounting hole; 4a, adjusting screw; 4b, nut; 5a, base; 5b, center line of the base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0029] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "vertical", "inclined" indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] In the description of the embodiments of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection method or a detachable connection method; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Refer to the following Figure 1 A preferred embodiment of the base bridge structure of the electric vehicle charging device. In this embodiment, the external hanging bridge ear 1a is connected to the base 5a through the connecting screw 1c. The connecting function of the connecting screw 1c can also be other methods such as welding, riveting, and bonding with strong glue. The purpose is to form the bridge ear cavity 1b, reserving a three-dimensional position for the bridge hook 2a to be embedded in the bridge ear 1a. The three-dimensional position means that the opening of the bridge ear cavity 1b faces downward, and the bridge ear cavity 1b is closed on three sides, two sides, or one side. The top of the bridge ear cavity 1b bears the upward prestress and biting force of the bridge hook 2a, and the closed side of the bridge ear cavity 1b restricts partial or all planar displacements of the bridge hook 2a and bears the side components of the prestress and biting force of the bridge hook 2a. When the bridge ear 1a and the base 5a are integrally formed by casting or local hollowing of the base, the bridge ear cavity 1b must exist, and its functional and action modes in the three-dimensional position remain unchanged, but the connecting screw 1c will not exist.

[0032] Furthermore, in a preferred embodiment of the bridge structure, the bottom end 2b of the bridge hook is embedded in the bridge ear cavity 1b. When there is an upward prestress on the bridge hook 2b, a biting force is formed with the top of the bridge ear cavity 1b. In addition to restricting the displacement of the bottom 2b of the bridge hook, the side of the bridge ear cavity 1b also bears part of the biting force component, or the side of the bridge ear cavity 1b bears all the prestress of the bridge hook 2a and forms a biting force. At this time, the inner side of the bridge ear cavity 1b changes from a vertical shape to an inclined shape, which not only bears the biting force between the bridge hook 2a and the bridge ear 1a but also restricts the displacement of the bottom 2b of the bridge hook.

[0033] Furthermore, in a preferred embodiment of the bridge structure, the upper end 2c of the bridge hook is connected to the base cover plate 3a through the adjusting screw 4a and the nut 4b, and the prestress of the bridge hook 2a is adjusted through the adjusting screw 4a.

[0034] Furthermore, in a preferred embodiment of the bridge structure, the bridge ear 1a and the bridge hook 2a form a group of small bridge structures, and multiple groups of small bridge structures in the base 5a form a large bridge structure around the inside of the base. The bridge structure of the electric vehicle charging device base is composed of several small bridge structures, and these small bridge structures are evenly distributed in the base 5a around the center line 5b of the base.

[0035] Preferred embodiment of the processing technology of the bridge structure. In this embodiment, the bridge ear 1a is an external component, and the raw materials of the bridge hook 2a component are plates, such as steel, alloy, etc. It is formed by one-time stamping, trimming, drilling (punching holes), and bending with a special mold. The process is simple, material-saving, with consistent standards, good versatility, easy quality control, and low batch production and processing costs. When the bridge ear 1a is integrally formed with the base 5a, only the bridge hook 2a needs to be processed and formed according to the above process.

[0036] Installation and debugging steps of the preferred embodiment of the bridge structure, including the following steps:

[0037] Step 1: Select the corresponding standard thickness and width of the bridge hook 2a component and the external bridge ear 1a component in the spare parts library according to the maximum failure force required by the bridge structure design. The bridge ear 1a integrally processed with the base 5a does not need to be selected. For the bridge structure within the same base 5a, only one set of model bridge ear 1a components and bridge hook 2a components can be selected.

[0038] Step 2: Place the bridge hook 2a through the installation hole 3b of the base cover plate, let the bottom end 2b of the bridge hook be embedded in the cavity 1b of the bridge ear, and connect the upper end 2c of the bridge hook with the cover plate 3a through the adjusting screw 4a. The nut 4b is below the upper end 2c of the bridge hook. Manually tighten the adjusting screw 4a and the nut 4b so that the bridge hook 2a is sleeved in the bridge ear 1a without falling off.

[0039] Step 3: Repeat Step 2 to pre-install all the bridge hooks 2a within the base 5a.

[0040] Step 4: Through the installation hole 3b of the base cover plate, tighten the nut 4b, and tighten the adjusting screw 4a with a torque wrench at the upper end of the cover plate 3a so that each group of bridge hooks 2a fits tightly with the bridge ear 1a, and symmetrically tighten each group of bridge structures within the base 5a to reach the designed prestress value.

[0041] Step 5: After one or more groups of bridge structures within the base 5a fail, replace the failed bridge ear 1a component or bridge hook 2a component. After replacement, check the other groups of bridge structures and calibrate the torque of the adjusting screw 4a with a torque wrench, and calibrate all the adjusting screws 4a within the base 5a according to the design value.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, as well as various combinations that are obvious after understanding the disclosure of this application. These changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. Base bridge structure of electric vehicle charging device, including bridge ears and bridge hooks, It is characterized in that A downward cavity is formed between the bridge ear and the base housing. The lower part of the bridge hook is embedded into the cavity of the bridge ear to form an interlocking connection. There are multiple groups evenly distributed in the base; the opening of the cavity of the bridge ear faces downward, and the lower end of the bridge hook faces upward and is embedded into the cavity of the bridge ear. The bridge ear and the bridge hook are connected in an interlocking manner; when the bridge hook is not stressed, it slides freely on the engaging surface with the bridge ear. When the bridge hook is stressed, it fits tightly with the engaging surface of the bridge ear. When the force on the bridge hook is within the set safety range value, the engaging surface fits tightly without loosening. After exceeding the set safety range value, the engagement between the bridge hook and the bridge ear begins to gradually slip until the engaging surface is completely separated and the engagement fails. After the engagement fails, it is achieved through the deformation of the material of any one of the components under stress, while the other component remains intact; the maximum value of the safety range of the bridge hook is the maximum failure force of the bridge hook and the bridge ear, which is determined by the material and deflection of the bridge hook and the bridge ear, the material thickness and width, and is obtained through the material mechanics design calculation of the selected materials of the bridge hook and the bridge ear in advance.

2. Processing technology of the base bridge structure of the electric vehicle charging device according to claim 1, It is characterized in that The cavity of the bridge ear is integrally processed with the casting of the base and the partial hollowing out of the base.

3. Processing technology of the base bridge structure of the electric vehicle charging device according to claim 1, It is characterized in that The cavity of the bridge ear is formed by installing a split external hanging component in the base. The split external hanging component of the bridge ear and the bridge hook component are formed into the required component structure by one-time stamping with a special mold installed on a stamping machine.

4. Installation and commissioning construction steps of the base bridge structure of the electric vehicle charging device according to claim 1, It is characterized in that Include the following steps: Step 1: According to the maximum failure force required by the bridge structure, select bridge hook components and bridge ear external hanging components with different standard thicknesses and widths. Bridge ears integrally processed with the base do not need to be selected; For the bridge structures within the same base, only one set of bridge ear components and bridge hook components of the same model can be selected; Step 2: Place the bridge hook through the installation hole of the base cover plate, let the bottom end of the bridge hook be embedded into the cavity of the bridge ear, and connect the upper end of the bridge hook with the cover plate through a screw. The nut is below the upper end of the bridge hook. Manually tighten the screw and the nut to make the bridge hook not fall off in the bridge ear; Step 3: Repeat Step 2 to pre-install all the bridge hooks in the base; Step 4: Fix the nut through the installation hole of the base cover plate, and tighten the screw with a torque wrench at the upper end of the cover plate to make each group of bridge hooks fit tightly with the bridge ears, symmetrically tighten each group of bridge structures in the base and reach the designed prestress value; Step 5: After one or more groups of bridge structures in the base fail, replace the failed bridge ear components or bridge hook components. After replacement, check the other groups of bridge structures and calibrate them all according to the design value with a torque wrench.

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