Fixed mounting method and fixed mounting tool for automobile engine bottom guard plate

Abstract

The invention relates to a fixed installation method and a fixed installation tool for an automobile engine bottom guard plate, the fixed installation tool is used for installing the bottom guard plate on an automobile body, the fixed installation tool comprises a first connecting rod and a second connecting rod, and one end of the first connecting rod is rotatably connected with one end of the second connecting rod; the other end of the first connecting rod is rotationally connected with the vehicle body mounting frame, and the other end of the second connecting rod is rotationally connected with the bottom guard plate mounting frame; after the vehicle body installation frame is fixedly connected with a vehicle body, the bottom protection plate is installed on the bottom protection plate installation frame, the first connecting rod, the second connecting rod and the bottom protection plate installation frame are adjusted, so that the height and the angle of the bottom protection plate meet the design requirements, and then the first locking mechanism between the first connecting rod and the vehicle body installation frame is locked; the first connecting rod and the second connecting rod are locked through the second locking mechanism, the second connecting rod and the bottom guard plate installation frame are locked through the third locking mechanism, the same bottom guard plate can meet the requirements of different vehicle types through the method and the tool, and the design quantity and the mold cost are reduced.

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 a 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] The underbody guard is a protective device installed on the chassis of the vehicle. It can not only prevent dirt and protect the core components at the bottom of the vehicle, but also improve the wind resistance performance of the vehicle. For example, the shape of the car engine body is complex, the bottom flatness of this area is poor and it is connected to the engine compartment. The airflow flowing through the bottom of the car is easy to separate here, resulting in complex airflow in this area. Adding an underbody guard at the bottom of this area can effectively improve the flatness of the bottom of the engine, while achieving the protection function, reducing the turbulence at the bottom of the vehicle and improving the wind resistance performance of the car.

[0004] In addition, due to the different powertrain forms of the same platform models, the installation position of the vehicle underbody guard is different, and the same underbody guard is difficult to meet the assembly requirements of multiple models on the same platform. Therefore, the car underbody guard needs to be re-molded and designed according to the environment of each car, which increases the workload and mold costs. Traditional underbody guards are directly fixed to the suspension with bolts and clips, but this fixing method cannot adjust the height and angle of the underbody guard, nor can it achieve compatibility of the same guard with other models on the same platform. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and installation tool for fixing an automobile engine underbody guard plate. The installation method enables the same underbody guard plate to meet the assembly requirements of different vehicle models, eliminates the need for mold design, and reduces 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 plate of an automobile engine, wherein the underbody guard plate is installed on a vehicle body by using a fixing and installing tool, wherein the fixing and installing tool comprises 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 a vehicle body mounting frame, and the other end of the second connecting rod is rotatably connected to the underbody guard plate mounting frame;

[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 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 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 via the elongated hole and threaded fasteners.

[0011] Optionally, a first support shaft is provided on the body mounting frame, and an 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. 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 supporting shaft. The second locking mechanism includes two second gears fixed to the second supporting 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, sliding locking pins, one of which is inserted into a tooth groove of one second gear, and the other locking pin is inserted into a tooth groove of another second gear, thereby realizing locking and fixing 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 connecting plate 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 synchronously adjusted 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 plate fixing and installation tool, comprising 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 a vehicle body mounting frame, the other end of the second connecting rod is rotatably connected to the underbody 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 underbody guard plate;

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

[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. 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 achieve the switching of locking and loosening states. It has a simple mechanical structure and is easy to install and disassemble, which improves the installation and maintenance efficiency, thereby reducing maintenance costs and maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, 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 Example 1 of the present invention. Figure 1 ;

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

[0025] Figure 3 is a schematic structural diagram of the first locking mechanism of Example 1 of the present invention;

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

[0027] 3-1. The 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. A fixed installation tool is installed at a fixed position of the underbody guard plate at the bottom of the vehicle body, and then the underbody guard plate is installed on the fixed installation tool. The height and angle of the underbody guard plate are adjusted by the fixed 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 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 frame 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 frame 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] First, fix the vehicle body fixing frame 3 of the fixing installation tool at the installation position of the bottom guard plate of the vehicle body, then fix the bottom guard plate to the bottom guard plate mounting frame 4, adjust the first connecting rod 1, the second connecting rod 2 and the bottom guard plate mounting frame 4 so that the height and angle of the bottom guard plate meet the design requirements of the corresponding vehicle model, then lock the first locking mechanism 5 between the first connecting rod 1 and the vehicle body mounting frame 3, lock the second locking mechanism 6 between the first connecting rod 1 and the second connecting rod 2, and lock the third locking mechanism 7 between the second connecting rod 2 and the bottom guard plate mounting frame 4.

[0037] 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 axial direction of the first supporting shaft 3-1.

[0038] 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 .

[0039] 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.

[0040] 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 5-2 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.

[0041] 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.

[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 bolts is rotatably connected to the connecting ends of the first connecting rod 1 and the second connecting rod 2, and the end of the rod is threadedly connected with nuts, and the nuts and the heads cooperate 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. The first connecting rod 1 is slidably connected with a second locking pin 6-1, 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. The second connecting rod 2 is slidably connected with a second locking pin 6-1 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 and fixing the second connecting rod 2 and the second support shaft 9.

[0044] Correspondingly, the second locking pin 6-1 is provided with a locking hole, and the first connecting rod 1 and the second connecting rod 2 are provided with internal threaded holes matching the locking holes. 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 supporting shaft 4 - 1 and the second connecting rod 2 for locking and fixing the third supporting 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 direction 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 a 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 fixing 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, and 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, and 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, and the grooves 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 a 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, first fix the entire fixed installation tool to the bottom of the vehicle body through the long holes on the vehicle body mounting plate of the bolts, then fix the bottom guard plate to the bottom guard plate mounting plate through the bolts, 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, 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 and fix 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, according to the vehicle data, through CFD simulation, based on the airflow field results of the vehicle at high speed, the shape, size and flatness of the engine underguard are designed, which will not be described in detail here.

[0055] The underbody guard plate installation method of the present 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 vehicle models, thereby improving the versatility of the same underbody guard plate on different vehicle models on the same platform, reducing the design workload and mold costs, and also reducing the 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 the switching of locking and releasing 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 the installation and maintenance efficiency, thereby reducing the maintenance cost and maintenance frequency.

[0056] Example 2

[0057] The present embodiment provides an underbody guard plate fixing and installation tool, which is composed of a first connecting rod 1, a second connecting rod 2, a vehicle body mounting frame 3 and an underbody 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 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 guard plate mounting frame 4, and a third locking mechanism 7 is provided between the second connecting rod 2 and the underbody 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 axial direction of the first supporting 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 bolts is rotatably connected to the connecting ends of the first connecting rod 1 and the second connecting rod 2, and the end of the rod is threadedly connected with nuts, and the nuts and the heads cooperate 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. The first connecting rod 1 is slidably connected with a second locking pin 6-1, 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. The second connecting rod 2 is slidably connected with a second locking pin 6-1 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 and fixing the second connecting rod 2 and the second support shaft 9.

[0065] Correspondingly, the second locking pin 6-1 is provided with a locking hole, and the first connecting rod 1 and the second connecting rod 2 are provided with internal threaded holes matching the locking holes. 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 supporting shaft 4 - 1 and the second connecting rod 2 for locking and fixing the third supporting 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 direction 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 a 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 fixing 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, and 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, and 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, and the grooves 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 a 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 only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for fixing and installing an underbody guard plate of an automobile engine, characterized in that: The bottom guard plate is installed on the vehicle body by 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 frame, and the other end of the second connecting rod is rotatably connected to the bottom guard plate mounting frame; 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 plate 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. A method for fixing and installing an automobile engine bottom guard plate according to claim 1, characterized in that: 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.

4. A method for fixing and installing an automobile engine bottom guard plate as claimed in claim 1, characterized in that: The vehicle body mounting frame is provided with a first support shaft, and 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. The first connecting rod is slidably connected with a locking pin, and the sliding locking pin and the end of the locking pin are inserted into the tooth groove of the first gear to realize the locking and fixation of the first connecting rod and the vehicle body mounting frame.

5. A method for fixing and installing an automobile engine bottom guard plate as claimed in claim 1, characterized in that: 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 supporting shaft. The second locking mechanism includes two second gears fixed to the second supporting 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, 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 bottom guard plate as claimed in 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. A method for fixing and installing an automobile engine bottom guard plate as claimed in claim 1, characterized in that: The vehicle body mounting frame comprises a vehicle body mounting plate, a connecting rod connecting plate is vertically arranged 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 arranged between the connecting rod connecting plate and the first connecting rod.

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

9. A method for fixing and installing an automobile engine underbody guard plate as claimed in claim 1, characterized in that: A plurality of installation and fixing tools are fixed on the bottom of the vehicle body, and 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 underbody guard plate of an automobile engine, characterized in that: It 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 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 frame is used for fixing to the bottom of the vehicle body, and the underbody guard plate mounting frame is used for fixing 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 frame.

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