An auxiliary device for mounting fender of electric vehicle

Abstract

The application discloses an auxiliary device for mounting a fender of an electric vehicle, comprising a base rod, a plurality of mounting seats are arranged on the base rod, each mounting seat has a first fixed end and a second fixed end, a magnetic attraction part and a negative pressure adsorption part are arranged on the first fixed end and the second fixed end, the magnetic attraction part and the negative pressure adsorption part of the first fixed end are used for fixing a vehicle body, the magnetic attraction part and the negative pressure adsorption part on the second fixed end are used for fixing the fender, the magnetic attraction part and the negative pressure adsorption part are in transmission connection, and in the process that the two negative pressure adsorption parts respectively fix the fender and the vehicle body, the magnetic attraction part can generate a magnetic attraction force to magnetically fix the fender and the vehicle body respectively. The technical problem that in some cases, the magnetic attraction fixing mode can cause the magnetic attraction force to weaken or disappear, and then cause the positioning tool to be not fixed firmly, the fender is easy to deviate under the influence of external force, and finally causes inaccurate positioning is solved.

Description

Technical Field

[0001] This invention belongs to the field of automotive processing technology, and more specifically, relates to an auxiliary device for mounting the fender of an electric vehicle. Background Technology

[0002] The car fender is the outer body panel installed around the car wheels. It is named after the shape and position of this part on old cars, which resembles a bird's wing. It is also called the fender.

[0003] During the installation of a car fender, the bolts must first be pre-tightened to ensure a stable initial connection. Then, the fender is adjusted using positioning tools to perfectly fit the car body. Next, the fender is firmly fixed using a fixing device to prevent displacement during bolt tightening. Then, all bolts are tightened to ensure installation strength. Finally, the fixing device and positioning tools are removed in sequence to complete the entire installation process.

[0004] When positioning fenders using positioning tools, magnetic fixation is typically employed. However, this method can weaken or eliminate the magnetic force in certain situations. For example, the presence of other strong magnetic field sources at the installation site (such as large electromagnetic equipment or welding machines) may interfere with the magnetic field distribution of the positioning tool, leading to unstable attraction or directional deviation. Specifically, electromagnetic interference during simultaneous welding operations in a vehicle repair shop can affect the magnetic force. Weakened or absent magnetic force can result in an unsecured fixation of the positioning tool, making the fender prone to displacement under external forces, ultimately leading to inaccurate positioning. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide an auxiliary device for the installation of electric vehicle fenders, so as to solve the technical problem that the magnetic attraction force is weakened or lost in some cases, resulting in the positioning tool being not firmly fixed, the fender being prone to displacement under the influence of external force, and ultimately leading to inaccurate positioning.

[0006] To achieve the aforementioned objective, the technical solution adopted by the present invention includes: an auxiliary device for mounting the fender of an electric vehicle, comprising a base rod, wherein a plurality of mounting seats are provided on the base rod, and the plurality of mounting seats are arranged sequentially along the length direction of the base rod; Each of the aforementioned mounting bases has a first fixed end and a second fixed end. The first fixed end and the second fixed end are each provided with a magnetic suction part and a negative pressure adsorption part. The magnetic suction part and the negative pressure adsorption part of the first fixed end are used to fix the car body, and the magnetic suction part and the negative pressure adsorption part of the second fixed end are used to fix the fender. The magnetic suction part and the negative pressure adsorption part are connected by a transmission. During the process of the two negative pressure adsorption parts fixing the fender and the body respectively, the magnetic suction part can be triggered to generate magnetic force so that the two magnetic suction parts can magnetically fix the fender and the body respectively.

[0007] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides an auxiliary device for installing fenders of electric vehicles. It adopts a dual fixing method of negative pressure adsorption and magnetic fixation. Compared with a single fixing method, it further enhances the fixing effect, greatly improves the stability of fender installation, and effectively avoids the problem of fender displacement caused by vibration or external force during installation.

[0008] For example, magnetic fixation methods can weaken or disappear in some situations. This weakening or disappearance of magnetic force can cause the positioning tool to be loosely fixed, making the fender prone to shifting under external forces and ultimately leading to inaccurate positioning. Using auxiliary negative pressure adsorption fixation can maintain a good fixation even when the magnetic force is weakened or disappearing, allowing the fender installation to continue normally.

[0009] (2) The present invention provides an auxiliary device for installing fenders of electric vehicles. The negative pressure adsorption part and the magnetic adsorption part are connected in a transmission manner, linking the negative pressure adsorption fixing process with the magnetic adsorption fixing process. When the negative pressure adsorption fixing is operated, the magnetic adsorption fixing can be realized simultaneously, making the operation more convenient and faster.

[0010] (3) The present invention provides an auxiliary device for installing fenders of electric vehicles. After the magnetic suction part magnetically fixes the fender and the body, the negative pressure adsorption part fits more tightly with the fender and the body, thereby reducing the possibility of the negative pressure adsorption part failing to fix due to gas leakage and enhancing the negative pressure adsorption effect of the negative pressure adsorption part.

[0011] Furthermore, the mounting base is a long, strip-shaped block structure, with its length direction perpendicular to the length direction of the base rod, and its middle part connected to the base rod.

[0012] Furthermore, the mounting base has a hollow structure, and a partition is provided inside the mounting base to divide the interior of the mounting base into a first chamber and a second chamber, with the first chamber and the second chamber arranged sequentially along the thickness direction of the mounting base; The first chamber is provided with a movable plate, which is slidably and sealingly connected to the mounting base along the thickness direction of the mounting base. An operating rod is provided on the side of the base rod near the mounting base. The operating rod is arranged along the length direction of the base rod. A connecting rod is provided between the operating rod and the movable plate. One end of the connecting rod is connected to the operating rod, and the other end extends into the first chamber along the thickness direction of the mounting base and is connected to the movable plate. The connecting rod is slidably and sealingly connected to the mounting base along the thickness direction of the mounting base. The bottom of the side wall of the first chamber has an exhaust pipe with an exhaust one-way valve. The bottom of the partition has an air inlet pipe with the upper end of the air inlet pipe communicating with the first chamber. An air inlet one-way valve is provided on the air inlet pipe. The magnetic attraction part is an electromagnetic block, which is installed on the side of the mounting base facing away from the base rod. The negative pressure adsorption part is a negative pressure adsorption block, which is also installed on the side of the mounting base facing away from the base rod. The bottom of the negative pressure adsorption block is provided with a first through hole communicating with the second chamber.

[0013] Furthermore, the electromagnetic block has a magnetic attraction surface parallel to the base rod on the side facing away from the base rod, and the magnetic attraction surfaces of the two electromagnetic blocks are in the same plane. The negative pressure adsorption block has an adsorption surface in the same plane as the magnetic attraction surface on the side facing away from the base rod, and the first through hole is opened on the adsorption surface.

[0014] Furthermore, an elastic element is provided between the operating lever and the base rod.

[0015] Furthermore, a magnetic component is provided on the connecting rod, and a magnetic control switch is provided on the base rod. When the magnetic component approaches the magnetic control switch, the electromagnetic block can be energized through the magnetic control switch.

[0016] Furthermore, the electromagnetic block has a second through hole at its center, extending through the electromagnetic block along the thickness direction of the mounting base, and the negative pressure adsorption block is installed in the second through hole.

[0017] Furthermore, rubber pads are adhered to both the magnetic surface and the adsorption surface.

[0018] Furthermore, a limiting block is provided at the top of the partition to limit the position of the movable plate. When the lower end of the movable plate abuts against the limiting block, the exhaust pipe communicates with the space of the first chamber located below the movable plate.

[0019] Furthermore, a first sleeve is provided on the side of the mounting base near the base rod. The first sleeve is arranged along the thickness direction of the mounting base, and the end of the first sleeve near the mounting base communicates with the first cavity. The first sleeve is slidably sealed to a second sleeve. The end of the second sleeve away from the base rod extends through the movable plate and the partition to enter the second chamber. The end of the second sleeve away from the base rod is open. The second sleeve is slidably sealed to the partition and fixedly connected to the movable plate. The outer walls of the first sleeve and the second sleeve, at the ends away from the mounting base, are respectively provided with a third through hole and a fourth through hole that communicate with their interiors. When the movable plate is located on the side of the first chamber away from the partition, the third through hole and the fourth through hole coincide. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural illustration of an embodiment of the present invention. Figure 1 ; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 This is a structural illustration of an embodiment of the present invention. Figure 2 ; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 for Figure 4 Enlarged structural diagram at point B; Figure 6 for Figure 5 Enlarged structural diagram at point C; Figure 7 This is a schematic diagram of the structure of the electromagnetic block and the negative pressure adsorption block; Figure 8 This is a schematic diagram of the exploded structure of the device.

[0022] Reference numerals: Base rod 1, Mounting seat 2, First fixed end 3, Second fixed end 4, First chamber 5, Second chamber 6, Partition 7, Movable plate 8, Operating rod 9, Connecting rod 10, Exhaust pipe 11, Exhaust check valve 12, Inlet pipe 13, Inlet check valve 14, Electromagnetic block 15, Negative pressure adsorption block 16, Magnetic surface 17, Adsorption surface 18, First through hole 19, Elastic element 20, Magnetic element 21, Magnetic control switch 22, Second through hole 23, Rubber pad 24, Limiting block 25, First sleeve 26, Second sleeve 27, Third through hole 28, Fourth through hole 29. Detailed Implementation

[0023] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0024] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0026] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0027] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] Please see Figure 1-8 The present invention provides a technical solution: an auxiliary device for installing fenders of electric vehicles, including a base rod 1. The base rod 1 serves as the support structure for the entire auxiliary device and provides an installation base for other components. Its length can be designed according to the size requirements of the fender installation area of ​​different vehicle models so that it can cover the installation range of the fenders.

[0029] Multiple mounting seats 2 are provided on the base rod 1. The multiple mounting seats 2 are arranged sequentially along the length direction of the base rod 1 so that the mounting seats 2 can provide multiple points of fixation in the length direction of the base rod 1, thereby enhancing the reliability of fixing the fender and the body.

[0030] Furthermore, in order to further improve the uniformity of the fixed action points, multiple mounting bases 2 are arranged sequentially at equal intervals along the length of the base rod 1.

[0031] Each mounting base 2 has a first fixed end 3 and a second fixed end 4, both of which are equipped with a magnetic suction part and a negative pressure adsorption part. A negative pressure environment is created inside the negative pressure adsorption part. When the negative pressure adsorption part is close to the surface of the car body or fender, the external atmospheric pressure will press the negative pressure adsorption part tightly against the contact surface, thus achieving a firm adsorption and fixation. The negative pressure adsorption method has the advantage of non-destructive fixing, preventing scratches or damage to the car body and fender surfaces, while also effectively fixing the fender and car body, making them less prone to relative movement.

[0032] The magnetic suction unit generates magnetic force to magnetically fix the fender and body. There is a transmission connection between the magnetic suction unit and the negative pressure adsorption unit. During the process of the two negative pressure adsorption units fixing the fender and body, power is transmitted to the magnetic suction unit, causing it to generate magnetic force so that the two magnetic suction units magnetically fix the fender and body respectively.

[0033] The dual fixing method of negative pressure adsorption and magnetic fixation further enhances the fixing effect compared to a single fixing method, greatly improves the stability of the fender installation, and effectively avoids the problem of fender displacement caused by vibration or external force during installation.

[0034] In addition, by connecting the negative pressure adsorption part and the magnetic attraction part, the negative pressure adsorption fixing process is linked with the magnetic attraction fixing process. During the operation of negative pressure adsorption fixing, magnetic attraction fixing can be achieved simultaneously, making the operation more convenient.

[0035] The specific implementation steps are as follows: Step 1: Place the base rod 1 of the auxiliary device in the fender mounting area of ​​the electric vehicle, so that the base rod 1 covers the fender mounting range.

[0036] Step 2: Align the mounting base 2 with the middle position between the car body and the fender, so that the first fixing end 3 and the second fixing end 4 are located on the surface of the car body and the fender respectively, and the two negative pressure adsorption parts are in close contact with the car body contact surface and the fender contact surface respectively.

[0037] Step 3: Activate the negative pressure adsorption unit to create a negative pressure environment inside, and use the external atmospheric pressure to firmly adsorb the mounting seat 2 onto the surface of the car body and fender.

[0038] Step 4: While the negative pressure adsorption unit is working, power is transmitted to the magnetic adsorption unit through the transmission connection, causing the magnetic adsorption unit to generate magnetic attraction force, which magnetically fixes the car body and fender respectively.

[0039] Step 5: Check the double fixation and confirm that there is no relative movement between the fender and the car body before proceeding with the subsequent installation operations.

[0040] Step Six: After installation, close the negative pressure adsorption unit and the magnetic adsorption unit, and remove the auxiliary device.

[0041] In this embodiment: In order to make the magnetic attraction part and negative pressure adsorption part on the first fixed end 3 and the second fixed end 4 apply more balanced force to the car body and fender, the mounting seat 2 is a long strip block structure. The length direction of the mounting seat 2 is perpendicular to the length direction of the base rod 1, and the middle part of the mounting seat 2 is connected to the base rod 1.

[0042] In this embodiment: the mounting base 2 is a hollow structure, and a partition 7 is provided inside the mounting base 2 to divide the mounting base 2 into a first chamber 5 and a second chamber 6. The first chamber 5 and the second chamber 6 are arranged sequentially along the thickness direction of the mounting base 2.

[0043] A movable plate 8 is installed inside the first chamber 5. The movable plate 8 is slidably and sealingly connected to the mounting base 2 along the thickness direction of the mounting base 2. This sliding and sealing connection allows the movable plate 8 to move smoothly within the first chamber 5 while effectively preventing gas leakage. An operating rod 9 is installed on the side of the base rod 1 near the mounting base 2, and the operating rod 9 is arranged along the length direction of the base rod 1. A connecting rod 10 is installed between the operating rod 9 and the movable plate 8. One end of the connecting rod 10 is fixedly connected to the operating rod 9, and the other end extends into the first chamber 5 along the thickness direction of the mounting base 2 and is fixedly connected to the movable plate 8. The connecting rod 10 is slidably and sealingly connected to the mounting base 2 along the thickness direction of the mounting base 2, and this sliding and sealing connection isolates the first chamber 5 from external gas.

[0044] When the operating lever 9 is moved along the thickness direction of the mounting base 2, the operating lever 9 drives the connecting rod 10 to move, and the connecting rod 10 in turn pushes the movable plate 8 to slide along the thickness direction of the mounting base 2 within the first chamber 5. As the movable plate 8 moves, the space on the upper and lower sides of the first chamber 5 changes. Since the bottom of the side wall of the first chamber 5 has an exhaust pipe 11 with an exhaust one-way valve 12, when the movable plate 8 moves closer to the partition 7, the space on the upper side of the movable plate 8 increases, the internal gas pressure decreases, the space on the lower side of the movable plate 8 decreases, the pressure increases, the exhaust one-way valve 12 opens, and the gas in the space on the lower side of the movable plate 8 is discharged.

[0045] The bottom of the partition 7 has an air inlet pipe 13, the upper end of which is connected to the first chamber 5. An air inlet one-way valve 14 is installed on the air inlet pipe 13. After the operating lever 9 is released, the pressure in the space above the movable plate 8 decreases, which generates a suction force on the movable plate 8, causing the movable plate 8 to move away from the partition 7. The volume of the space below the movable plate 8 increases, the air inlet one-way valve 14 opens, and the gas in the second chamber 6 enters the space below the movable plate 8 in the first chamber 5. Since the gas in the second chamber 6 is extracted, a negative pressure environment is formed in the second chamber 6, which enables the negative pressure adsorption part to generate negative pressure adsorption force on the fender and the body.

[0046] The magnetic attraction part is an electromagnetic block 15, which is installed on the side of the mounting base 2 facing away from the base rod 1. When the electromagnetic block 15 is energized, it generates a magnetic attraction force, which can attract the fender and the body, enhancing the stability of the fixation and preventing the fender or body from moving during installation. When the negative pressure attraction part attracts and fixes the fender and the body, the electromagnetic block 15 is energized to generate a magnetic attraction force, further strengthening the fixation effect. This dual fixation method ensures the smooth progress of the installation process.

[0047] The negative pressure adsorption part is a negative pressure adsorption block 16, which is also installed on the side of the mounting base 2 facing away from the base rod 1. The bottom of the negative pressure adsorption block 16 is provided with a first through hole 19 that communicates with the second chamber 6. When the second chamber 6 is in a negative pressure state, the external atmospheric pressure will press the fender or body tightly onto the negative pressure adsorption block 16. The negative pressure adsorption block 16 is connected to the second chamber 6 through the first through hole 19. The negative pressure adsorption block 16 can achieve the adsorption function with the help of the negative pressure of the second chamber 6, without the need for an additional complex negative pressure generating device, which simplifies the device structure and reduces costs.

[0048] In use, push the operating lever 9 to move it along the thickness direction of the mounting base 2. The operating lever 9 drives the movable plate 8 to slide in the first chamber 5 through the connecting rod 10, so that the gas in the space below the movable plate 8 is discharged through the exhaust pipe 11 and the exhaust one-way valve 12. Release the operating lever 9, and the movable plate 8 moves away from the partition 7 under the action of pressure difference. The gas in the second chamber 6 enters the space below the movable plate 8 in the first chamber 5 through the intake pipe 13 and the intake one-way valve 14, and the second chamber 6 forms a negative pressure environment. Before pushing the operating lever 9, the negative pressure adsorption block 16 on the side of the mounting base 2 facing away from the base rod 1 should be attached to the fender or body surface. The negative pressure in the second chamber 6 is transmitted to the negative pressure adsorption block 16 through the first through hole 19, so that the external atmospheric pressure presses the fender or body tightly onto the negative pressure adsorption block 16. During the negative pressure adsorption process of the negative pressure adsorption block 16, the electromagnetic block 15 (magnetic adsorption part) is energized, so that it generates magnetic force to adsorb the fender and body, forming a double fixing effect with the negative pressure adsorption.

[0049] In this embodiment: to ensure that the vehicle body and the fender exterior are on the same plane, the electromagnetic block 15 has a magnetic attraction surface 17 parallel to the base rod 1 on the side facing away from the base rod 1, and the magnetic attraction surfaces 17 of the two electromagnetic blocks 15 are on the same plane. The negative pressure adsorption block 16 has an adsorption surface 18 on the side facing away from the base rod 1, which is on the same plane as the magnetic attraction surface 17. The first through hole 19 is opened on the adsorption surface 18. Since the magnetic attraction surfaces 17 of the two electromagnetic blocks 15 are on the same plane, and the adsorption surface 18 is on the same plane as the magnetic attraction surface 17, the vehicle body and the fender are on the same plane when fixed.

[0050] In this embodiment, an elastic element 20 is provided between the operating lever 9 and the base lever 1.

[0051] The elastic element 20 has the following two functions: ① Because the elastic element 20 has a certain elastic potential energy, when the external force applied to the operating lever 9 is removed, the elastic element 20 will release the stored elastic potential energy, generating a spring force opposite to the direction of movement of the operating lever 9, pushing the operating lever 9 to automatically return to the initial position (note that at this time, the negative pressure adsorption block 16 should not have an adsorption effect). This process does not require the operator to manually reset the operating lever 9, simplifying the operation process and improving work efficiency.

[0052] In addition, resetting the operating lever 9 will cause the connecting lever 10 and the movable plate 8 to return to their initial positions. After the movable plate 8 is reset, the volume of the first chamber 5 returns to its initial state, the gas exchange between the exhaust pipe 11 and the intake pipe 13 also stops, and all components of the device return to their initial stable state, preparing for the next fender installation operation, so that the device can be reused.

[0053] ② During the movement of the elastic element 20, the elastic force it generates pulls the movable plate 8 away from the partition 7 a certain distance. This movement of the movable plate 8 away from the partition 7 results in more gas being extracted from the second chamber 6. Given a constant volume, according to the relationship between gas pressure and gas quantity, a decrease in gas quantity leads to a decrease in gas pressure, thus increasing the negative pressure inside the second chamber 6. The negative pressure adsorption block 16 has a first through hole 19 at its bottom that communicates with the second chamber 6. This increased negative pressure in the second chamber 6 further increases the pressure difference between the negative pressure adsorption block 16 and the contact surfaces of the fender and body, strengthening the adsorption force of the external atmospheric pressure on the fender and body, thereby further enhancing the negative pressure adsorption force and making the fender and body more securely fixed during installation.

[0054] Furthermore, the elastic element 20 is a spring disposed between the operating lever 9 and the base rod 1, with both ends of the spring fixedly connected to the operating lever 9 and the base rod 1, respectively.

[0055] In this embodiment, a magnetic element 21 is provided on the connecting rod 10. This magnetic element 21 is typically a permanent magnet with strong magnetic properties and stable performance. Its function is to serve as a key signal source for energizing the electromagnetic block 15 during the movement of the connecting rod 10. Driven by the operating rod 9, the connecting rod 10 slides and moves within the mounting base 2 along the thickness direction. When the connecting rod 10 moves to a specific position, the magnetic element 21 will approach the magnetic control switch 22 provided on the base rod 1.

[0056] A magnetic switch 22 is mounted on the base rod 1. The magnetic switch 22 is a circuit switching device controlled by a magnetic field signal, and it typically contains a magnetically sensitive element, such as a reed switch. When the magnetic component 21 approaches the magnetic switch 22, the magnetically sensitive element inside the magnetic switch 22 senses the change in the magnetic field generated by the magnetic component 21. Taking a reed switch as an example, under normal circumstances, the two reeds inside the reed switch are separated, and the circuit is in an open state. However, when the magnetic component 21 approaches, the generated magnetic field magnetizes the two reeds inside the reed switch, causing them to attract and contact each other, thus making the circuit conductive.

[0057] In the fender installation auxiliary device, when the operator pushes the operating lever 9, the connecting rod 10 moves the movable plate 8, thereby causing the negative pressure adsorption block 16 to adsorb and fix the fender and the car body. Simultaneously, as the connecting rod 10 moves with the operating lever 9, the magnetic component 21 on the connecting rod 10 approaches the magnetic control switch 22 on the base rod 1. The magnetic control switch 22 senses the change in magnetic field, its internal circuit is activated, and a signal is transmitted to the circuit module controlling the energization of the electromagnetic block 15, causing the electromagnetic block 15 to be energized. The energized electromagnetic block 15 generates magnetic attraction, further adsorbing the fender and the car body, enhancing the stability of the fixation. This method of controlling the energization of the electromagnetic block 15 through the cooperation of the magnetic component 21 and the magnetic control switch 22 achieves automatic connection between negative pressure adsorption and magnetic fixation, improving the automation level and ease of operation of the installation process.

[0058] In this embodiment: the center of the electromagnetic block 15 has a second through hole 23 that runs through the electromagnetic block 15 along the thickness direction of the mounting base 2, and the negative pressure adsorption block 16 is installed in the second through hole 23.

[0059] The beneficial effects are as follows: ① When the negative pressure adsorption block 16 starts working, it generates adsorption force to adsorb the car body and fender through internal negative pressure. Because it is located at the center of the electromagnetic block 15, the point of application of the force is in a relatively central and symmetrical position. During the adsorption process, the reaction forces around the negative pressure adsorption block 16 can balance each other. The negative pressure adsorption block 16 can transfer the adsorption force to the car body and fender in a relatively balanced way, so that the force on the entire contact surface is basically the same, avoiding the problem of local weak adsorption caused by uneven force.

[0060] ② Because the negative pressure adsorption block 16 is located at the center of the electromagnetic block 15, during the adsorption process, the car body and fenders, under the uniform adsorption force, will undergo uniform deformation towards the center of the negative pressure adsorption block 16. This uniform deformation allows the contact surfaces of the car body and fenders with the negative pressure adsorption block 16 to fit together better, reducing the gaps between the contact surfaces. The car body and fenders are in full and tight contact with the negative pressure adsorption block 16, thereby improving the stability of the adsorption.

[0061] ③ During fender installation, the electromagnetic block 15 generates magnetic attraction after being energized, which works in conjunction with the attraction force of the negative pressure adsorption block 16 to fix the car body and fender. The negative pressure adsorption block 16 is located at the center of the electromagnetic block 15, so that the centers of action of these two forces are basically coincident. When fixing the car body and fender, the magnetic attraction and adsorption forces can cooperate and work together to form a stable fixing force system. If the centers of action of the forces of the negative pressure adsorption block 16 and the electromagnetic block 15 are not coincident, then when subjected to external forces, the car body and fender may twist or shift due to the misalignment of the two forces, affecting the positioning effect.

[0062] In this embodiment, rubber pads 24 are adhered to both the magnetic surface 17 and the adsorption surface 18.

[0063] Rubber pad 24 has the following functions: ① When installing the fender onto the vehicle body, the electromagnetic block and negative pressure adsorption block 16 will come into contact with and be compressed against the vehicle body and fender. Since there may be minor unevenness or processing errors on the surface of the vehicle body and fender, without the cushioning of the rubber pad 24, the electromagnetic block and negative pressure adsorption block 16 would directly contact them, and the impact force generated during installation might damage the surface of the vehicle body and fender, such as scratches or dents. The rubber pad 24, with its good elasticity and flexibility, can elastically deform when compressed, absorbing and dispersing some of the impact force, effectively reducing the rigid collision between the electromagnetic block / negative pressure adsorption block 16 and the vehicle body and fender, thereby protecting the surface quality of the vehicle body and fender.

[0064] ② During installation, it is necessary to ensure that the electromagnetic block and the negative pressure adsorption block 16 can be firmly adsorbed onto the vehicle body and fenders to prevent slippage or displacement due to vibration or external forces. The surface of the rubber pad 24 usually has a certain degree of roughness, which increases the friction between the rubber pad 24 and the vehicle body and fenders. When the electromagnetic block fixes the vehicle body and fenders through magnetic attraction and the negative pressure adsorption block 16 fixes them through negative pressure adsorption, the friction between the rubber pad 24 and the contact surface plays an important auxiliary fixing role, improving the fixing effect of the electromagnetic block and the negative pressure adsorption block 16.

[0065] ③ The working principle of the negative pressure adsorption block 16 is to create negative pressure inside, using external atmospheric pressure to tightly adsorb the car body and fenders onto the adsorption surface 18. For a good negative pressure adsorption effect, the seal between the negative pressure adsorption block 16 and the car body and fenders is crucial. If there is a gap between them, outside air will enter the interior of the negative pressure adsorption block 16 through the gap, causing the internal negative pressure to fail to be effectively established or maintained, thus reducing the adsorption force. The rubber pad 24 has good flexibility and conformability. When the negative pressure adsorption block 16 adsorbs the car body and fenders, the rubber pad 24 can fit tightly against the contact surface, filling any possible tiny gaps and forming a reliable sealing barrier, thereby improving the negative pressure adsorption effect and allowing the car body and fenders to be more firmly adsorbed.

[0066] In this embodiment: a limiting block 25 is provided on the top of the partition 7 to limit the position of the movable plate 8. When the lower end of the movable plate 8 abuts against the limiting block 25, the exhaust pipe 11 communicates with the space of the first chamber 5 located below the movable plate 8.

[0067] When the lower end of the movable plate 8 abuts against the limiting block 25, the exhaust pipe 11 and the space of the first chamber 5 located on the lower side of the movable plate 8 remain in communication, so that the exhaust function of the exhaust pipe 11 can always be realized normally.

[0068] In this embodiment, a first sleeve 26 is provided on the side of the mounting base 2 near the base rod 1. The first sleeve 26 is arranged along the thickness direction of the mounting base 2, providing a mounting base for the subsequent second sleeve 27. The end of the first sleeve 26 near the mounting base 2 communicates with the first chamber 5, that is, the end of the first sleeve 26 near the mounting base 2 is open, which facilitates the second sleeve 27 to extend or retract through the opening of the first sleeve 26.

[0069] A second sleeve 27 is slidably and sealed within the first sleeve 26. This sliding seal between the second sleeve 27 and the first sleeve 26 is typically achieved using sealing elements such as sealing rings. This ensures smooth sliding of the second sleeve 27 within the first sleeve 26 while preventing gas leakage at the gap between them. The end of the second sleeve 27 furthest from the base rod 1 extends through the movable plate 8 and the partition 7 into the second chamber 6. This end of the second sleeve 27 is open, allowing gas communication between the second chamber 6 and the interior of the second sleeve 27. When the pressure inside the second chamber 6 changes, gas can flow between the second chamber 6 and the interior of the second sleeve 27 through this opening. The second sleeve 27 is also slidably and sealed to the partition 7, again to prevent gas leakage at the gap between the second sleeve 27 and the partition 7. The second sleeve 27 is fixedly connected to the movable plate 8. The movement of the movable plate 8 can drive the second sleeve 27 to slide synchronously within the first sleeve 26, thereby achieving the purpose of controlling the airflow interruption by moving the movable plate 8.

[0070] The outer walls of the first sleeve 26 and the second sleeve 27, at the ends away from the mounting base 2, are respectively provided with a third through hole 28 and a fourth through hole 29 that communicate with their interiors. When the movable plate 8 is located on the side of the first chamber 5 away from the partition plate 7, the third through hole 28 and the fourth through hole 29 coincide, thus forming a complete gas flow channel.

[0071] The specific principle is that, under normal working conditions, the second chamber 6 is connected to the inside of the second sleeve 27 through the opening of the second sleeve 27. However, since the third through hole 28 and the fourth through hole 29 do not coincide, the second chamber 6 is isolated from the outside. The inside of the second chamber 6 can maintain a negative pressure state, so that the negative pressure adsorption block 16 can adsorb and fix the car body and fender.

[0072] When the positioning device needs to be disassembled, simply pull the operating lever 9 away from the mounting base 2. The operating lever 9 will move the movable plate 8 away from the partition 7. When the movable plate 8 abuts against the side of the first chamber 5 away from the partition 7, the third through hole 28 and the fourth through hole 29 will overlap. External gas can then enter the second sleeve 27 through these two overlapping through holes, and then enter the second chamber 6 through the opening of the second sleeve 27. As external gas continues to enter, the negative pressure in the second chamber 6 gradually disappears, and the negative pressure adsorption block 16 loses its adsorption and fixing function.

[0073] At the same time, when the operating lever 9 moves away from the mounting base 2, the magnetic component 21 on the connecting rod 10 moves away from the magnetic control switch 22 on the base rod 1. The magnetic control switch 22 can no longer sense the change in magnetic field, and the control electromagnetic block 15 is de-energized. The electromagnetic block 15 loses its magnetic attraction, further releasing the fixation to the body and fender, making it convenient to remove the positioning device from the body and fender.

[0074] The beneficial effects are as follows: ① Under normal working conditions, the third through hole 28 and the fourth through hole 29 do not overlap. The second chamber 6 is isolated from the outside and can maintain negative pressure, so that the negative pressure adsorption block 16 can adsorb and fix the body and fender, maintaining the stable positioning of the fender during installation.

[0075] ② When it is necessary to disassemble the positioning device, pull the operating rod 9 to move the movable plate 8 so that the third through hole 28 and the fourth through hole 29 coincide. External gas enters the second chamber 6 to eliminate the negative pressure, and the negative pressure adsorption block 16 loses its adsorption effect. The operation is simple and quick, and can quickly release the adsorption fixation.

[0076] ③ When the operating lever 9 moves, it will synchronously drive the magnetic component 21 to move away from the magnetic control switch 22, thereby de-energizing the electromagnetic block 15 and causing it to lose its magnetic attraction. This will cooperate with the negative pressure adsorption block 16 to lose its adsorption effect, thereby releasing the fixation on the car body and fenders and facilitating the disassembly of the positioning device.

[0077] ④ By moving the operating lever 9 away from the mounting base 2, both the fixing of the negative pressure adsorption block 16 and the fixing of the electromagnetic block can be released, linking the two processes together, simplifying the operation process, making the operation simpler, and improving the disassembly efficiency and convenience.

[0078] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An auxiliary device for mounting electric vehicle fenders, characterized in that: The base rod includes a base rod on which multiple mounting seats are provided, and the multiple mounting seats are arranged sequentially along the length of the base rod. Each of the aforementioned mounting bases has a first fixed end and a second fixed end. The first fixed end and the second fixed end are each provided with a magnetic suction part and a negative pressure adsorption part. The magnetic suction part and the negative pressure adsorption part of the first fixed end are used to fix the car body, and the magnetic suction part and the negative pressure adsorption part of the second fixed end are used to fix the fender. The magnetic suction part and the negative pressure adsorption part are connected by a transmission. During the process of the two negative pressure adsorption parts fixing the fender and the body respectively, the magnetic suction part can be triggered to generate magnetic force so that the two magnetic suction parts can magnetically fix the fender and the body respectively. The mounting base is a long, strip-shaped block structure, with its length direction perpendicular to the length direction of the base rod, and its middle part connected to the base rod. The mounting base has a hollow structure, and a partition is provided inside the mounting base to divide the interior of the mounting base into a first chamber and a second chamber. The first chamber and the second chamber are arranged sequentially along the thickness direction of the mounting base. The first chamber is provided with a movable plate, which is slidably and sealingly connected to the mounting base along the thickness direction of the mounting base. The base rod is provided with an operating rod on the side near the mounting base. The operating rod is arranged along the length direction of the base rod. A connecting rod is provided between the operating rod and the movable plate. One end of the connecting rod is connected to the operating rod, and the other end extends into the first chamber along the thickness direction of the mounting base and is connected to the movable plate. The connecting rod is slidably and sealingly connected to the mounting base along the thickness direction of the mounting base. The bottom of the side wall of the first chamber has an exhaust pipe with an exhaust one-way valve. The bottom of the partition has an air inlet pipe with the upper end of the air inlet pipe communicating with the first chamber. An air inlet one-way valve is provided on the air inlet pipe. The magnetic attraction part is an electromagnetic block, which is installed on the side of the mounting base away from the base rod. The negative pressure adsorption part is a negative pressure adsorption block, which is also installed on the side of the mounting base away from the base rod. The bottom of the negative pressure adsorption block is provided with a first through hole communicating with the second chamber. The connecting rod is equipped with a magnetic component, and the base rod is equipped with a magnetic control switch. When the magnetic component approaches the magnetic control switch, the electromagnetic block can be energized through the magnetic control switch.

2. The auxiliary device for mounting electric vehicle fenders according to claim 1, characterized in that: The electromagnetic block has a magnetic attraction surface parallel to the base rod on the side facing away from the base rod, and the magnetic attraction surfaces of the two electromagnetic blocks are in the same plane. The negative pressure adsorption block has an adsorption surface in the same plane as the magnetic attraction surface on the side facing away from the base rod, and the first through hole is opened on the adsorption surface.

3. The auxiliary device for mounting electric vehicle fenders according to claim 2, characterized in that: An elastic element is provided between the operating lever and the base rod.

4. The auxiliary device for mounting electric vehicle fenders according to claim 3, characterized in that: The electromagnetic block has a second through hole at its center, which extends through the electromagnetic block along the thickness direction of the mounting base, and the negative pressure adsorption block is installed in the second through hole.

5. The auxiliary device for mounting electric vehicle fenders according to claim 4, characterized in that: Rubber pads are adhered to both the magnetic surface and the adsorption surface.

6. The auxiliary device for mounting an electric vehicle fender according to claim 5, characterized in that: The top of the partition is provided with a limiting block for limiting the position of the movable plate. When the lower end of the movable plate abuts against the limiting block, the exhaust pipe communicates with the space of the first chamber located below the movable plate.

7. An auxiliary device for mounting an electric vehicle fender according to claim 6, characterized in that: The mounting base is provided with a first sleeve on the side near the base rod. The first sleeve is arranged along the thickness direction of the mounting base, and the end of the first sleeve near the mounting base is connected to the first chamber. The first sleeve is slidably sealed to a second sleeve. The end of the second sleeve away from the base rod extends through the movable plate and the partition to enter the second chamber. The end of the second sleeve away from the base rod is open. The second sleeve is slidably sealed to the partition and fixedly connected to the movable plate. The outer walls of the first sleeve and the second sleeve, at the ends away from the mounting base, are respectively provided with a third through hole and a fourth through hole that communicate with their interiors. When the movable plate is located on the side of the first chamber away from the partition, the third through hole and the fourth through hole coincide.

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