Automobile engine bottom guard plate fixing installation method and fixing installation tool

Abstract

The present application relates to a kind of automobile engine bottom guard fixed installation method and fixed installation tool, bottom guard is installed on vehicle body using fixed installation tool, fixed installation tool includes first connecting rod and second connecting rod, one end of first connecting rod is rotatably connected with one end of second connecting rod, the other end of first connecting rod is rotatably connected with vehicle body mounting bracket, the other end of second connecting rod is rotatably connected with bottom guard mounting bracket;Vehicle body mounting bracket is fixedly connected with vehicle body, bottom guard is installed on bottom guard mounting bracket, adjust first connecting rod, second connecting rod and bottom guard mounting bracket, so that the height and angle of bottom guard meet design requirements, then the first locking mechanism between first connecting rod and vehicle body mounting bracket is locked, the second locking mechanism between first connecting rod and second connecting rod is locked, the third locking mechanism between second connecting rod and bottom guard mounting bracket is locked, the method and tool of using the present application make the same bottom guard meet the needs of different vehicle models, reduce design quantity and mold cost.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engine bottom guard plate installation, and in particular to a method and tool for fixing and installing an automobile engine bottom guard plate. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] An underbody guard is a protective device installed on the vehicle's chassis. It not only protects core components from contamination but also improves the vehicle's wind resistance. For example, a vehicle engine has a complex shape, and this area, which is connected to the engine compartment, has poor bottom flatness. Airflow flowing through the underbody of the vehicle can easily separate here, leading to complex airflow in this area. Adding an underbody guard to this area effectively improves the flatness of the engine's underbody, providing protection while reducing turbulence under the vehicle and improving the vehicle's wind resistance.

[0004] Furthermore, due to the varying powertrain configurations used within the same platform, the installation locations of vehicle underbody guards vary, making it difficult for the same underbody guard to accommodate the assembly requirements of multiple models on the same platform. Consequently, underbody guards require redesigned molds tailored to each vehicle's specific environment, increasing both workload and mold costs. Traditional underbody guards are secured directly to the suspension using bolts and clips, but this method doesn't allow for adjustable height and angle, nor does it ensure compatibility with other models on the same platform. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a method and installation tool for fixing the underbody guard of an automobile engine. The installation method enables the same underbody guard to meet the assembly requirements of different models, eliminates the need for mold design, and reduces the vehicle design workload and mold costs.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for fixing and installing an underbody guard of an automobile engine, wherein the underbody guard is installed on a vehicle body using a fixing and installation tool, wherein the fixing and installation tool includes a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the first connecting rod is rotatably connected to a vehicle body mounting bracket, and the other end of the second connecting rod is rotatably connected to the underbody guard mounting bracket;

[0008] After the body mounting frame is fixedly connected to the body, the bottom guard plate is installed on the bottom guard plate mounting frame, and the first connecting rod, the second connecting rod and the bottom guard plate mounting frame are adjusted so that the height and angle of the bottom guard plate meet the set design requirements. Then, the first locking mechanism between the first connecting rod and the body mounting frame is locked, the second locking mechanism between the first connecting rod and the second connecting rod is locked, and the third locking mechanism between the second connecting rod and the bottom guard plate mounting frame is locked.

[0009] Optionally, the vehicle body mounting bracket is provided with an elongated hole, and the vehicle body mounting bracket is fixedly connected to the bottom guard plate mounting position of the vehicle body through the elongated hole and threaded fasteners.

[0010] Optionally, the bottom guard plate mounting frame is provided with an elongated hole, and the bottom guard plate mounting frame is fixedly connected to a fixed position of the bottom guard plate through the elongated hole and threaded fasteners.

[0011] Optionally, a first support shaft is provided on the body mounting frame, and the end of the first connecting rod is rotatably connected to the first support shaft. The first locking mechanism includes a first gear that is sleeved and fixed on the outer periphery of the first support shaft. A locking pin is slidably connected to the first connecting rod, and the sliding locking pin and the end of the locking pin are inserted into the tooth groove of the first gear to achieve locking and fixation of the first connecting rod and the body mounting frame.

[0012] Optionally, a second support shaft passes between the other end of the first connecting rod and one end of the second connecting rod, and the first connecting rod and the second connecting rod are rotatably connected to the second support shaft. The second locking mechanism includes two second gears fixed to the second support shaft, one of the second gears corresponds to the end of the first connecting rod, and the other second gear corresponds to the end of the second connecting rod. The first connecting rod and the second connecting rod are both slidably connected with locking pins, and the sliding locking pins, one of which is inserted into the tooth groove of one second gear, and the other locking pin is inserted into the tooth groove of the other second gear, thereby realizing locking and fixation of the first connecting rod and the second connecting rod.

[0013] Optionally, the bottom guard plate mounting frame is provided with a third support shaft, the other end of the second connecting rod is rotatably connected to the third support shaft, the third locking mechanism includes a third gear fixed to the second support shaft, the second connecting rod is slidably connected with a locking pin, and the sliding locking pin is inserted into the tooth groove of the third gear, thereby realizing the locking and fixation of the second connecting rod and the bottom guard plate mounting frame.

[0014] Optionally, the vehicle body mounting frame includes a vehicle body mounting plate, a connecting rod connecting plate is vertically provided on the vehicle body mounting plate, the connecting rod connecting plate is rotatably connected to the end of the first connecting rod and a first locking mechanism is provided between the connecting rod and the first connecting rod.

[0015] Optionally, the bottom guard plate mounting frame includes a bottom guard plate mounting plate, and a connecting rod connecting plate is vertically provided on the bottom guard plate mounting plate. The connecting rod connecting plate is rotatably connected to the end of the second connecting rod and a third locking mechanism is provided between the connecting rod and the second connecting rod.

[0016] Optionally, multiple installation and fixing tools are fixed to the bottom of the vehicle body, and after the multiple installation and fixing tools are connected to the bottom guard plate, the multiple installation and fixing tools are adjusted synchronously so that the height and angle of the bottom guard plate meet the design requirements.

[0017] In a second aspect, an embodiment of the present invention provides a vehicle engine underbody guard fixing and installation tool, comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the first connecting rod is rotatably connected to a vehicle body mounting frame, and the other end of the second connecting rod is rotatably connected to the underbody guard mounting frame, a first locking mechanism is provided between the first connecting rod and the vehicle body mounting frame, a second locking mechanism is provided between the first connecting rod and the second connecting rod, and a third locking mechanism is provided between the second connecting rod and the underbody guard;

[0018] The vehicle body mounting bracket is used to be fixed to the bottom of the vehicle body, and the underbody guard plate mounting bracket is used to be fixed to the underbody guard plate so as to adjust the height and angle of the underbody guard plate through the first connecting rod, the second connecting rod and the underbody guard plate fixing bracket.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The underbody guard plate installation method of the present invention sets a fixed installation tool between the underbody guard plate and the vehicle body, and uses the fixed installation tool to fix the underbody guard plate instead of directly fixing the underbody guard plate to the suspension. The height and angle of the underbody guard plate can be adjusted by the fixed installation tool to meet the underbody guard plate installation design requirements of different vehicle models, thereby improving the versatility of the same underbody guard plate on different vehicle models on the same platform and reducing the design workload and mold costs.

[0021] 2. In the bottom guard plate installation method of the present invention, the first locking mechanism, the second locking mechanism and the third locking mechanism use the cooperation of locking pins and gears to realize the switching of locking and loosening states. It is a simple mechanical structure, easy to install and disassemble, and improves the installation and maintenance efficiency, thereby reducing maintenance costs and maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of the fixed installation tool in embodiment 1 of the present invention. Figure 1 ;

[0024] Figure 2This is a schematic diagram of the structure of the fixed installation tool in embodiment 1 of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic structural diagram of the first locking mechanism in accordance with Embodiment 1 of the present invention;

[0026] Among them, 1. first connecting rod, 2. second connecting rod, 3. body mounting bracket, 4. underbody mounting bracket, 5. first locking mechanism, 6. second locking mechanism, 7. third locking mechanism, 8. nut, 9. second support shaft;

[0027] 3-1. First support shaft;

[0028] 5-1. First gear, 5-2. First locking pin, 5-3. Slide groove;

[0029] 6-1. Second locking pin;

[0030] 7-1. Third locking pin. DETAILED DESCRIPTION

[0031] Example 1

[0032] This embodiment provides a method for fixing and installing an underbody guard plate of an automobile engine, wherein a fixing installation tool is installed at a fixing position of the underbody guard plate at the bottom of the vehicle body, and then the underbody guard plate is installed on the fixing installation tool. The height and angle of the underbody guard plate are adjusted by the fixing installation tool so that the height and angle of the underbody guard plate meet the set design requirements of the corresponding vehicle model.

[0033] The fixed installation tool is composed of a first connecting rod 1, a second connecting rod 2, a vehicle body mounting frame 3 and an underbody mounting frame 4, wherein one end of the first connecting rod 1 is rotatably connected to the vehicle body mounting frame 3, and a first locking mechanism 5 is provided between the first connecting rod 1 and the vehicle body mounting frame 3, the other end of the first connecting rod 1 is rotatably connected to one end of the second connecting rod 2 and a second locking mechanism 6 is provided between the first connecting rod 1 and the second connecting rod 2, the other end of the second connecting rod 2 is rotatably connected to the underbody mounting frame 4 and a third locking mechanism 7 is provided between the second connecting rod 2 and the underbody mounting frame 4.

[0034] The vehicle body mounting bracket 3 is used to be fixed to the mounting position of the bottom guard plate at the bottom of the vehicle body, and the bottom guard plate mounting bracket 4 is used to be fixed to the bottom guard plate.

[0035] The specific steps for installing the bottom guard plate using the fixed installation tool are as follows:

[0036] Firstly, the vehicle body fixing frame 3 of the fixed installation tool is fixed at the installation position of the bottom guard plate of the vehicle body bottom, then the bottom guard plate is fixedly connected with the bottom guard plate mounting frame 4, the first connecting rod 1, the second connecting rod 2 and the bottom guard plate mounting frame 4 are adjusted, so that the height and angle of the bottom guard plate meet the design requirements of the corresponding vehicle model, then the first locking mechanism 5 between the first connecting rod 1 and the vehicle body mounting frame 3 is locked, the second locking mechanism 6 between the first connecting rod 1 and the second connecting rod 2 is locked, and the third locking mechanism 7 between the second connecting rod 2 and the bottom guard plate mounting frame 4 is locked.

[0037] The vehicle body mounting frame 3 comprises a vehicle body mounting plate, one end of the vehicle body mounting plate is vertically fixed with a first connecting rod connecting plate, the first connecting rod connecting plate is provided with a first supporting shaft 3-1, one end of the first connecting rod 1 is rotationally connected with the first supporting shaft 3-1, the outer end of the first supporting shaft is threadedly connected with a nut 8, the nut 8 and the first connecting rod connecting plate press the end of the first connecting rod 1, preventing the first connecting rod 1 from moving along the axis direction of the first supporting shaft 3-1.

[0038] The first connecting rod 1 and the first supporting shaft 3-1 are provided with the first locking mechanism 5, and the first locking mechanism 5 is used for locking and fixing the first connecting rod 1 and the first supporting shaft 3-1.

[0039] In the embodiment, the first locking mechanism adopts a first gear 5-1, the first gear 5-1 is sleeved and fixed on the outer periphery of the first supporting shaft 3-1, the first connecting rod 1 is slidably connected with a first locking pin 5-2, the first locking pin 5-2 can slide along the axis direction of the first connecting rod 1, specifically, the first connecting rod 1 is provided with a sliding groove 5-3, the first locking pin 5-2 is slidably connected with the first connecting rod 1 through the sliding groove 5-3, the first locking pin 5-2 corresponds to the first gear 5-1, the first locking pin 5-2 slides along the sliding groove 5-3, the end of the first locking pin 5-2 can be inserted into the tooth groove of the first gear 5-1, thereby realizing the locking and fixing of the first connecting rod 1 and the first supporting shaft 3-1.

[0040] The first connecting rod 1 is provided with a locking hole, and correspondingly, the first locking pin is provided with a locking hole matched with the first locking hole, the locking hole on the first connecting rod 1 is an internal thread hole, when the first locking pin 5-2 slides to be inserted into the tooth groove of the first gear 5-1, the locking holes on the first connecting rod 1 and the first locking pin 5-2 are aligned, the first connecting rod 1 and the first locking pin 5-2 can be locked and fixed through the two locking holes and the bolt 5-4, so that the first connecting rod 1 and the first supporting shaft 3-1 can be kept in the locked state.

[0041] The connecting end portions of the first connecting rod 1 and the second connecting rod 2 pass through the second supporting shaft 9, the first connecting rod 1 and the second connecting rod 2 are both rotationally connected with the second supporting shaft 9, and the first connecting rod 1 and the second connecting rod 2 are provided with the second locking mechanism 6 to lock and fix the first connecting rod 1 and the second connecting rod 2.

[0042] Both ends of the second support shaft 9 are threadedly connected with nuts, or the second support shaft 9 is made of bolts, the rod of the bolt is rotatably connected to the connecting end of the first connecting rod 1 and the second connecting rod 2, and the end of the rod is threadedly connected with a nut, which cooperates with the head to press the first connecting rod 1 and the second connecting rod 2 to prevent the first connecting rod 1 and the second connecting rod 2 from moving along the axial direction of the second support shaft 9.

[0043] The second locking mechanism 6 includes two second gears fixed on the second support shaft 9, one of the second gears corresponds to the end of the first connecting rod 1, and the other second gear corresponds to the end of the second connecting rod 2. A second locking pin 6-1 is slidably connected to the first connecting rod 1, and the second locking pin 6-1 can be inserted into the tooth groove of the second gear corresponding to the end of the first connecting rod 1 on the second support shaft 9. A second locking pin 6-1 is slidably connected to the second connecting rod 2 through a sliding groove, and the second locking pin 6-1 can be inserted into the tooth groove of the second gear corresponding to the end of the second connecting rod 2 on the second support shaft 9, thereby locking the second connecting rod 2 and the second support shaft 9.

[0044] Correspondingly, a locking hole is provided on the second locking pin 6-1, and an internal threaded hole matching the locking hole is provided on the first connecting rod 1 and the second connecting rod 2. When the end of the second locking pin 6-1 is inserted into the tooth groove of the corresponding second gear, the second locking pin 6-1 on the first connecting rod 1 can be locked and fixed with the first connecting rod 1 through the internal threaded hole and the locking hole, and the second locking pin 6-1 on the second connecting rod 2 can be locked and fixed with the second connecting rod 2 through the internal threaded hole and the locking hole.

[0045] The bottom guard plate mounting frame 4 includes a bottom guard plate mounting plate, one end of which is vertically connected to a second connecting rod connecting plate, and a third support shaft 4-1 is provided on the second connecting rod connecting plate, and the third support shaft 4-1 is rotatably connected to the end of the second connecting rod 2.

[0046] A third locking mechanism 7 is provided between the third support shaft 4 - 1 and the second connecting rod 2 for locking and fixing the third support shaft 4 - 1 and the second connecting rod 2 .

[0047] The end of the third support shaft 4-1 is threadedly connected with a nut, and the nut and the second connecting rod connecting plate press the end of the second connecting rod 2 to prevent the second connecting rod 2 from moving along the axis of the third support shaft 4-1.

[0048] The third locking mechanism 7 includes a third gear, which is fixed on the outer periphery of the third support shaft. The second connecting rod 2 is slidably connected to the third locking pin 7-1 through a sliding groove. The third locking pin 7-1 can be inserted into the tooth groove of the third gear to achieve locking and fixation of the second connecting rod 2 and the third support shaft 4-1. A locking hole is provided on the third locking pin 7-1. Accordingly, an internal threaded hole corresponding to the locking hole is provided at the end of the second connecting rod 2. When the third locking pin 7-1 is inserted into the tooth groove of the third gear, the locking hole and the internal threaded hole are aligned. The third locking pin and the third connecting rod can be locked and fixed by bolts, locking holes and internal threaded holes.

[0049] The body mounting plate and the bottom guard plate mounting plate are both provided with long holes, the length of the long holes is 18mm-22mm, preferably 20mm, to avoid the misalignment problem between the installation position of the body mounting plate and the fixed installation point of the body due to the fixing of the installation tools.

[0050] The lengths of the first connecting rod 1 and the second connecting rod 2 can be the same or different, and can be set according to actual needs.

[0051] Furthermore, grooves are provided at the ends of the first connecting rod 1 and the second connecting rod 2, which are used to accommodate corresponding gears so that the gears will not protrude from the surfaces of the first connecting rod 1 and the second connecting rod 2. Accordingly, the locking pin cooperates with the corresponding connecting rod through the sliding groove, and the outer side surface of the locking pin will not protrude from the surface of the corresponding connecting rod.

[0052] When using the fixed installation tool, the first step is to fix the entire fixed installation tool to the bottom of the vehicle body through the long holes on the vehicle body mounting plate with bolts, and then fix the bottom guard plate to the bottom guard plate mounting plate with bolts, and then rotate the first connecting rod, the second connecting rod and the bottom guard plate mounting frame so that the height and angle of the bottom guard plate meet the design requirements, and then slide the four locking pins so that the locking pins are inserted into the tooth grooves of the corresponding gears, and then use bolts to lock the locking pins and the corresponding connecting rods to complete the installation of the bottom guard plate.

[0053] Furthermore, in order to improve the fixing stability of the bottom guard plate, a plurality of fixing and installing tools are fixed on the bottom of the vehicle body, and then the bottom guard plate is fixed to the bottom guard plate mounting frame of the plurality of fixing and installing tools.

[0054] In this embodiment, the shape, size and flatness of the engine underguard are designed based on the vehicle data, CFD simulation and the airflow field results of the vehicle at high speed. A detailed description is not given here.

[0055] The underbody guard plate installation method of this embodiment utilizes a fixed installation tool to fix the underbody guard plate instead of directly fixing the underbody guard plate to the suspension. The fixed installation tool can be used to adjust the height and angle of the underbody guard plate to meet the underbody guard plate installation design requirements of different models, thereby improving the versatility of the same underbody guard plate on different models of the same platform, reducing design workload and mold costs, and also reducing project development cycle and development costs. At the same time, the first locking mechanism, the second locking mechanism and the third locking mechanism use the cooperation of locking pins and gears to achieve switching between locking and loosening states. It has a simple mechanical structure, is easy to install and disassemble, and is easy to mass produce. It has strong feasibility and high promotion, which improves installation and maintenance efficiency, thereby reducing maintenance costs and maintenance frequency.

[0056] Example 2

[0057] This embodiment provides a bottom guard plate fixing and installation tool, which consists of a first connecting rod 1, a second connecting rod 2, a vehicle body mounting frame 3 and a bottom guard plate mounting frame 4, wherein one end of the first connecting rod 1 is rotatably connected to the vehicle body mounting frame 3, and a first locking mechanism 5 is provided between the first connecting rod 1 and the vehicle body mounting frame 3, the other end of the first connecting rod 1 is rotatably connected to one end of the second connecting rod 2, and a second locking mechanism 6 is provided between the first connecting rod 1 and the second connecting rod 2, the other end of the second connecting rod 2 is rotatably connected to the bottom guard plate mounting frame 4, and a third locking mechanism 7 is provided between the second connecting rod 2 and the bottom guard plate mounting frame 4.

[0058] The body mounting frame 3 includes a body mounting plate, a first connecting rod connecting plate is vertically fixed to the bottom surface of one end of the body mounting plate, a first supporting shaft 3-1 is provided on the first connecting rod connecting plate, one end of the first connecting rod 1 is rotatably connected to the first supporting shaft 3-1, and a nut 8 is threadedly connected to the outer end of the first supporting shaft. The nut 8 and the first connecting rod connecting plate press the end of the first connecting rod 1 to prevent the first connecting rod 1 from moving along the axis of the first support shaft 3-1.

[0059] A first locking mechanism 5 is provided between the first connecting rod 1 and the first supporting shaft 3 - 1 , and the first locking mechanism 5 is used to lock and fix the first connecting rod 1 and the first supporting shaft 3 - 1 .

[0060] In this embodiment, the first locking mechanism adopts the first gear 5-1, and the first gear 5-1 is sleeved and fixed on the outer periphery of the first support shaft 3-1. The first locking pin 5-2 is slidably connected to the first connecting rod 1, and the first locking pin 5-2 can slide along the axial direction of the first connecting rod 1. Specifically, a sliding groove 5-3 is provided on the first connecting rod 1, and the first locking pin 5-2 is slidably connected to the first connecting rod 1 through the sliding groove 5-3. The first locking pin 5-2 corresponds to the first gear 5-1, and the first locking pin 5-2 slides along the sliding groove 5-3. The end of the first locking pin 5-2 can be inserted into the tooth groove of the first gear 5-1, thereby realizing the locking and fixation of the first connecting rod 1 and the first support shaft 3-1.

[0061] A locking hole is provided on the first connecting rod 1, and correspondingly, a locking hole matching the first locking hole is provided on the first locking pin. The locking hole on the first connecting rod 1 is an internal threaded hole. When the first locking pin 5-2 slides to be inserted into the tooth groove of the first gear 5-1, the locking holes on the first connecting rod 1 and the first locking pin 5-3 are aligned, and the first locking pin 5-2 can be locked and fixed to the first connecting rod 1 by the bolt 5-4 and the two locking holes, so that the first connecting rod 1 and the first support shaft 3-1 can remain in a locked state.

[0062] A second support shaft 9 passes through the connecting ends of the first connecting rod 1 and the second connecting rod 2. The first connecting rod 1 and the second connecting rod 2 are both rotatably connected to the second support shaft 9. A second locking mechanism 6 is provided between the first connecting rod 1 and the second connecting rod 2 to lock and fix the first connecting rod 1 and the second connecting rod 2.

[0063] Both ends of the second support shaft 9 are threadedly connected with nuts, or the second support shaft 9 is made of bolts, the rod of the bolt is rotatably connected to the connecting end of the first connecting rod 1 and the second connecting rod 2, and the end of the rod is threadedly connected with a nut, which cooperates with the head to press the first connecting rod 1 and the second connecting rod 2 to prevent the first connecting rod 1 and the second connecting rod 2 from moving along the axial direction of the second support shaft 9.

[0064] The second locking mechanism 6 includes two second gears fixed on the second support shaft 9, one of the second gears corresponds to the end of the first connecting rod 1, and the other second gear corresponds to the end of the second connecting rod 2. A second locking pin 6-1 is slidably connected to the first connecting rod 1, and the second locking pin 6-1 can be inserted into the tooth groove of the second gear corresponding to the end of the first connecting rod 1 on the second support shaft 9. A second locking pin 6-1 is slidably connected to the second connecting rod 2 through a sliding groove, and the second locking pin 6-1 can be inserted into the tooth groove of the second gear corresponding to the end of the second connecting rod 2 on the second support shaft 9, thereby locking the second connecting rod 2 and the second support shaft 9.

[0065] Correspondingly, a locking hole is provided on the second locking pin 6-1, and an internal threaded hole matching the locking hole is provided on the first connecting rod 1 and the second connecting rod 2. When the end of the second locking pin 6-1 is inserted into the tooth groove of the corresponding second gear, the second locking pin 6-1 on the first connecting rod 1 can be locked and fixed with the first connecting rod 1 through the internal threaded hole and the locking hole, and the second locking pin 6-1 on the second connecting rod 2 can be locked and fixed with the second connecting rod 2 through the internal threaded hole and the locking hole.

[0066] The bottom guard plate mounting frame 4 includes a bottom guard plate mounting plate, one end of which is vertically connected to a second connecting rod connecting plate, and a third support shaft 4-1 is provided on the second connecting rod connecting plate, and the third support shaft 4-1 is rotatably connected to the end of the second connecting rod 2.

[0067] A third locking mechanism 7 is provided between the third support shaft 4 - 1 and the second connecting rod 2 for locking and fixing the third support shaft 4 - 1 and the second connecting rod 2 .

[0068] The end of the third support shaft 4-1 is threadedly connected with a nut, and the nut and the second connecting rod connecting plate press the end of the second connecting rod 2 to prevent the second connecting rod 2 from moving along the axis of the third support shaft 4-1.

[0069] The third locking mechanism 7 includes a third gear, which is fixed on the outer periphery of the third support shaft. The second connecting rod 2 is slidably connected to the third locking pin 7-1 through a sliding groove. The third locking pin 7-1 can be inserted into the tooth groove of the third gear to achieve locking and fixation of the second connecting rod 2 and the third support shaft 4-1. A locking hole is provided on the third locking pin 7-1. Accordingly, an internal threaded hole corresponding to the locking hole is provided at the end of the second connecting rod 2. When the third locking pin 7-1 is inserted into the tooth groove of the third gear, the locking hole and the internal threaded hole are aligned. The third locking pin and the third connecting rod can be locked and fixed by bolts, locking holes and internal threaded holes.

[0070] The body mounting plate and the bottom guard plate mounting plate are both provided with long holes, the length of the long holes is 18mm-22mm, preferably 20mm, to avoid the misalignment problem between the installation position of the body mounting plate and the fixed installation point of the body due to the fixing of the installation tools.

[0071] The lengths of the first connecting rod 1 and the second connecting rod 2 can be the same or different, and can be set according to actual needs.

[0072] Furthermore, grooves are provided at the ends of the first connecting rod 1 and the second connecting rod 2, which are used to accommodate corresponding gears so that the gears will not protrude from the surfaces of the first connecting rod 1 and the second connecting rod 2. Accordingly, the locking pin cooperates with the corresponding connecting rod through the sliding groove, and the outer side surface of the locking pin will not protrude from the surface of the corresponding connecting rod.

[0073] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for fixing and installing an automobile engine bottom guard plate, characterized in that: The underbody guard is mounted on the vehicle body using a fixed installation tool, wherein the fixed installation tool includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the first connecting rod is rotatably connected to the vehicle body mounting bracket, and the other end of the second connecting rod is rotatably connected to the underbody guard mounting bracket; After the body mounting frame is fixedly connected to the body, the bottom guard plate is installed on the bottom guard plate mounting frame, and the first connecting rod, the second connecting rod and the bottom guard plate mounting frame are adjusted so that the height and angle of the bottom guard plate meet the set design requirements. Then, the first locking mechanism between the first connecting rod and the body mounting frame is locked, the second locking mechanism between the first connecting rod and the second connecting rod is locked, and the third locking mechanism between the second connecting rod and the bottom guard plate mounting frame is locked.

2. A method for fixing and installing an automobile engine underbody guard according to claim 1, characterized in that: The vehicle body mounting frame is provided with an elongated hole, and the vehicle body mounting frame is fixedly connected to the bottom guard plate mounting position of the vehicle body through the elongated hole and the threaded fastener.

3. The method for fixing and installing an automobile engine underbody guard according to claim 1, wherein: The bottom guard plate mounting frame is provided with an elongated hole, and the bottom guard plate mounting frame is fixedly connected to a fixed position of the bottom guard plate through the elongated hole and the threaded fastener.

4. The method for fixing and installing an automobile engine underbody guard according to claim 1, wherein: The vehicle body mounting frame is provided with a first support shaft, the end of the first connecting rod is rotatably connected to the first support shaft, the first locking mechanism includes a first gear sleeved and fixed on the outer periphery of the first support shaft, and a locking pin is slidably connected to the first connecting rod. The sliding locking pin and the end of the locking pin are inserted into the tooth groove of the first gear to achieve locking and fixation of the first connecting rod and the vehicle body mounting frame.

5. The method for fixing and installing an automobile engine underbody guard according to claim 1, wherein: A second support shaft passes through the other end of the first connecting rod and one end of the second connecting rod, and the first connecting rod and the second connecting rod are rotatably connected to the second support shaft. The second locking mechanism includes two second gears fixed to the second support shaft, one of the second gears corresponds to the end of the first connecting rod, and the other second gear corresponds to the end of the second connecting rod. The first connecting rod and the second connecting rod are both slidably connected with locking pins, and the sliding locking pins, one of which is inserted into the tooth groove of one second gear, and the other locking pin is inserted into the tooth groove of the other second gear, thereby realizing the locking and fixation of the first connecting rod and the second connecting rod.

6. A method for fixing and installing an automobile engine underbody guard according to claim 1, characterized in that: The bottom guard plate mounting frame is provided with a third support shaft, the other end of the second connecting rod is rotatably connected to the third support shaft, the third locking mechanism includes a third gear fixed to the second support shaft, the second connecting rod is slidably connected with a locking pin, and the sliding locking pin is inserted into the tooth groove of the third gear, thereby realizing the locking and fixation of the second connecting rod and the bottom guard plate mounting frame.

7. The method for fixing and installing an automobile engine underbody guard according to claim 1, wherein: The vehicle body mounting frame includes a vehicle body mounting plate, a connecting rod connecting plate is vertically provided on the vehicle body mounting plate, the connecting rod connecting plate is rotatably connected to the end of the first connecting rod and a first locking mechanism is provided between the connecting rod and the first connecting rod.

8. The method for fixing and installing an automobile engine underbody guard according to claim 1, characterized in that: The bottom guard plate mounting frame includes a bottom guard plate mounting plate, and a connecting rod connecting plate is vertically provided on the bottom guard plate mounting plate. The connecting rod connecting plate is rotatably connected to the end of the second connecting rod and a third locking mechanism is provided between the connecting rod and the second connecting rod.

9. The method for fixing and installing an automobile engine underbody guard according to claim 1, wherein: A plurality of installation and fixing tools are fixed on the bottom of the vehicle body. After the plurality of installation and fixing tools are connected to the bottom guard plate, the plurality of installation and fixing tools are adjusted synchronously so that the height and angle of the bottom guard plate meet the design requirements.

10. A tool for fixing and installing an automobile engine bottom guard plate, characterized in that: The first connecting rod comprises a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the first connecting rod is rotatably connected to the vehicle body mounting frame, the other end of the second connecting rod is rotatably connected to the bottom guard plate mounting frame, a first locking mechanism is provided between the first connecting rod and the vehicle body mounting frame, a second locking mechanism is provided between the first connecting rod and the second connecting rod, and a third locking mechanism is provided between the second connecting rod and the bottom guard plate; The vehicle body mounting bracket is used to be fixed to the bottom of the vehicle body, and the underbody guard plate mounting bracket is used to be fixed to the underbody guard plate so as to adjust the height and angle of the underbody guard plate through the first connecting rod, the second connecting rod and the underbody guard plate mounting bracket.

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