Foldable multifunctional middle safety frame and tractor

Abstract

The utility model relates to a foldable type multifunctional centrally-mounted safety frame and tractor, the tractor comprises a tractor main body and a safety frame, the tractor main body comprises a chassis and a gearbox installed on the chassis, and the gearbox is located in the middle of the tractor main body; the safety frame comprises a first camber beam and two support sets, each support set comprises a first support and a second support, and the two ends of the first camber beam are connected with the ends, in the length direction, of the first supports respectively. Each support set comprises a folding positioning assembly used for connecting the first support and the second support in the support set. The ends, away from the first support, of the two second supports are fixedly connected with the gearbox. The safety frame is directly installed on the gearbox of the tractor chassis, the strength of the safety frame is enhanced, and the safety frame arranged in the middle can provide a larger safety accommodation area for a driver. The safety frame is folded through the folding positioning assembly, and the height of the whole tractor can be reduced in the transportation process.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a foldable multifunctional central safety frame and a tractor. Background Art

[0002] During the tractor design process, in order to ensure the personal safety of the driver after the tractor rolls over, a safety frame needs to be designed to provide the driver with sufficient safe accommodation area.

[0003] Most safety racks are rear safety racks installed on the rear floor of the tractor. The overall installation strength of the safety rack is greatly affected by the strength of the floor. The integrated safety rack does not have a foldable function. The non-foldable safety rack requires a certain height for the storage position and the transport box when transporting and storing the whole machine, which easily causes space waste.

[0004] In addition to ensuring sufficient safe accommodation area for the driver during driving, the safety frame can be folded during transportation to lower the height of the entire machine for easy transportation and storage. Utility Model Content

[0005] In order to ensure that the driver has enough safe accommodation area during driving, the height of the whole machine can be lowered during transportation to facilitate transportation and storage, the present application provides a foldable multifunctional central safety frame and tractor.

[0006] In the first aspect, the present application provides a foldable multifunctional central safety frame, comprising a first curved beam and two bracket groups, each bracket group comprising a first bracket, a second bracket and a folding positioning assembly for connecting the first bracket and the second bracket in the bracket group, the two ends of the first curved beam are respectively connected to one end of a first bracket, and the ends of the two second brackets away from the first bracket are respectively fixedly connected to the installation location.

[0007] The beneficial effect of the utility model is that the safety frame can be folded by the folding positioning assembly, so that the height of the safety frame can be lowered during transportation, which is convenient for transportation and storage of the safety frame.

[0008] Further, for each of the bracket groups, the folding positioning assembly includes a folding limit bracket and a limit pin, the folding limit bracket is fixedly connected to the corresponding second bracket, the folding limit bracket includes a reference hole, a first hole located in the vertical direction of the reference hole, and a second hole located in the horizontal direction of the reference hole, and the hole distance between the first hole and the reference hole is equal to the hole distance between the second hole and the reference hole;

[0009] For each of the bracket groups, the end of the first bracket away from the first bending beam is plugged into the folding limit bracket, and the first bracket is provided with a third hole and a fourth hole distributed along the axial direction of the first bracket, and the limit pin is respectively plugged between the third hole and the reference hole and between the fourth hole and the first hole, or between the third hole and the reference hole and between the fourth hole and the second hole.

[0010] The beneficial effect of adopting the above further solution is that the safety frame can be folded by folding the limit bracket and the limit pin, the operation is simple and convenient, and the convenience of folding the safety frame is improved.

[0011] Further, for each of the bracket groups, the folding limit bracket includes a first vertical plate, a second vertical plate and a supporting bottom plate, the supporting bottom plate includes a vertical portion and a horizontal portion, the side walls corresponding to the first vertical plate and the second vertical plate are respectively fixedly connected to the vertical portion, the bottom walls corresponding to the first vertical plate and the second vertical plate are respectively fixedly connected to the horizontal portion, and the reference hole, the first hole and the second hole are respectively opened on the first vertical plate and the second vertical plate;

[0012] For each of the bracket groups, when the limit pin is respectively inserted between the third hole and the reference hole, and between the fourth hole and the first hole, the side wall of the first bracket abuts against the vertical part of the support base plate; when the limit pin is respectively inserted between the third hole and the reference hole, and between the fourth hole and the second hole, the side wall of the first bracket abuts against the horizontal part of the support base plate.

[0013] The beneficial effect of adopting the above further solution is that the first bracket is fixed by the limiting pin, and the vertical part and the horizontal part can limit the movement of the first bracket.

[0014] Furthermore, for each of the bracket groups, rubber pads are installed on the vertical part and the horizontal part of the support base plate.

[0015] The beneficial effects of adopting the above further solution are: reducing the vibration of the safety frame, reducing the wear of the safety frame, and reducing the noise caused by the collision between the safety frame and the supporting bottom plate.

[0016] Further, for each of the bracket groups, a gas spring is connected between the first bracket and the second bracket.

[0017] The beneficial effect of adopting the above further solution is that the movement speed of the gas spring is relatively slow, the dynamic force is small, the force caused by the folding movement of the safety frame can be alleviated, and the efficiency of the folding work of the safety frame is improved.

[0018] Furthermore, for each of the bracket groups, the second bracket includes a bracket body, a second bent beam and a connecting seat, the other end of the bracket body away from the first bracket is integrally formed with the second bent beam, one end of the bracket body is fixedly connected to the transverse part of the supporting base plate, the end of the second bent beam away from the bracket body is fixedly connected to the connecting seat, and the connecting seat is fixedly connected to the place to be installed.

[0019] The beneficial effect of adopting the above further solution is that the frame body and the second curved beam are integrally formed, which reduces the connection points and enhances the integrity and stability of the safety frame.

[0020] Furthermore, for each of the bracket groups, a plurality of reinforcing ribs are fixedly connected between the second curved beam and the connecting seat.

[0021] The beneficial effect of adopting the above further solution is that by providing reinforcing ribs, the connection strength and bending and torsion resistance between the second curved beam and the connecting seat are improved, and the stability and safety of the second bracket are improved.

[0022] Furthermore, handrails and rearview mirrors are fixedly connected to the two first brackets corresponding to the safety frame. The rearview mirrors include a left rearview mirror and a right rearview mirror. An alarm light is installed on the outer side wall of the first bracket above the left rearview mirror.

[0023] The beneficial effects of adopting the above further scheme are: the installation location can be the installation location corresponding to the tractor and other vehicles, and the convenience of the driver getting on and off the vehicle is improved by setting the handrail. The driver's driving safety is improved by setting the rearview mirror, and it is convenient for the driver to check the surrounding conditions of the tractor. When the driver needs to warn the surrounding people or vehicles, the alarm light can be turned on by manually controlling the switch, so that the alarm light emits a warning light signal to attract the attention of the surrounding people, thereby effectively avoiding potential safety risks. The alarm light is installed on the outer wall of the first bracket above the left rearview mirror, and the position is obvious.

[0024] Furthermore, the first bracket is a hollow structure, and the wiring harness connected to the warning light is routed through the inner hollow part of the first bracket.

[0025] The beneficial effect of adopting the above further solution is that the aesthetics and neatness of the warning light after installation are improved.

[0026] In a second aspect, the present application also provides a tractor equipped with a foldable multifunctional mid-mounted safety frame as described in any one of the first aspects, comprising a vehicle body, wherein the vehicle body comprises a chassis and a gearbox mounted on the chassis, wherein the gearbox is located in the middle of the vehicle body, and the ends of the two second brackets corresponding to the safety frame away from the first bracket are respectively fixedly connected to the gearbox.

[0027] The utility model has the following beneficial effects: by directly installing the safety frame on the gearbox of the tractor chassis, the strength of the safety frame is enhanced. Since the safety frame is located in the middle of the vehicle body, when the tractor rolls over, the centrally placed safety frame can provide a larger safety accommodation area for the driver. By folding the safety frame through the folding positioning assembly, the height of the entire tractor can be lowered during transportation, which is convenient for transportation and storage of the entire tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the safety frame in a vertical state according to an embodiment of the present application;

[0029] Figure 2 For the embodiment of this application Figure 1 Sectional view of AA in the middle;

[0030] Figure 3 This is a schematic diagram of a folding and limiting bracket structure according to an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the structure of the safety frame in the folded state according to the embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of a tractor equipped with a safety frame according to an embodiment of the present application;

[0033] Figure 6 For the embodiment of this application Figure 5 Enlarged view of point B in the middle.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Vehicle body; 2. Safety frame; 21. First curved beam; 22. First bracket; 221. Third hole; 222. Fourth hole; 23. Second bracket; 231. Frame body; 232. Second curved beam; 233. Connecting seat; 234. Reinforcing rib; 24. Folding limit bracket; 241. First vertical plate; 242. Second vertical plate; 243. Support bottom plate; 244. Limit sleeve; 245. Reference hole; 246. First hole; 247. Second hole; 25. Limit pin; 26. Lock pin; 3. Gas spring; 4. Armrest; 5. Rearview mirror; 6. Warning light. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] like Figures 1 to 4As shown, the embodiment of the present application discloses a foldable multifunctional central safety rack, including a first curved beam 21 and two bracket groups. The first curved beam 21 can be an inverted "U"-shaped structure made of square steel, which is one of the main structures of the safety rack 2. Each bracket group includes a first bracket 22 and a second bracket 23. The two ends of the first curved beam 21 are respectively connected to one end of the length direction of a first bracket 22. For each bracket group, the end of the first bracket 22 away from the first curved beam 21 is connected to the end of the corresponding second bracket 23, and the ends of the two second brackets 23 away from the first bracket 22 are respectively fixedly connected to the place to be installed.

[0038] Each bracket group also includes a folding positioning assembly for connecting the first bracket 22 and the second bracket 23 in the bracket group. When the safety frame 2 needs to be unfolded and the safety frame 2 is in a vertical state, the first bracket 22 and the second bracket 23 are fixed by the folding positioning assembly, so that the axial direction of the first bracket 22 in the support group is the same as the axial direction of the second bracket 23. When the safety frame 2 needs to be folded, the first bracket 22 and the first curved beam 21 are folded along the second bracket 23 by the folding positioning assembly, so that the axial direction of the first bracket 22 in the support group is different from the axial direction of the second bracket 23, that is, there is an angle difference between the axial direction of the first bracket 22 and the axial direction of the second bracket 23.

[0039] By folding the safety rack 2 through the folding positioning assembly, the height of the safety rack 2 can be lowered during transportation, which facilitates transportation and storage of the safety rack 2.

[0040] like Figures 1 to 6 As shown, in this embodiment, for each bracket group, the folding positioning assembly includes a folding limit bracket 24, a limit pin 25 and a locking pin 26. The folding limit bracket 24 includes a first vertical plate 241, a second vertical plate 242, an "L"-shaped support bottom plate 243, and three limit sleeves 244. The folding limit bracket 24 can be welded by the first vertical plate 241, the second vertical plate 242, an "L"-shaped support bottom plate 243, and three limit sleeves 244. The support bottom plate 243 includes a vertical part and a horizontal part. The side walls corresponding to the first vertical plate 241 and the second vertical plate 242 are respectively fixedly connected to the vertical part, and the bottom walls corresponding to the first vertical plate 241 and the second vertical plate 242 are respectively fixedly connected to the horizontal part. The first vertical plate 241 and the second vertical plate 242 can be arranged in parallel. The horizontal part is fixedly connected to the end of the second bracket 23. For example, the end of the second bracket 23 is welded to the horizontal part.

[0041] For each folding positioning component, three limiting holes distributed in the form of an isosceles right triangle are provided on the first vertical plate 241 and the second vertical plate 242. The three limiting holes include a reference hole 245, a first hole 246 located vertically above the reference hole 245, and a second hole 247 located horizontally on one side of the reference hole 245. The hole spacing between the first hole 246 and the reference hole 245 is equal to the hole spacing between the second hole 247 and the reference hole 245, that is, the connecting line between the hole opening point corresponding to the reference hole 245, the hole opening point corresponding to the first hole 246, and the hole opening point corresponding to the second hole 247 is an isosceles right triangle.

[0042] In this embodiment, the apertures of the three limiting holes are the same, and the reference hole 245 of the first vertical plate 241 is coaxially arranged with the reference hole 245 of the second vertical plate 242, the first hole 246 of the first vertical plate 241 is coaxially arranged with the first hole 246 of the second vertical plate 242, and the second hole 247 of the first vertical plate 241 is coaxially arranged with the second hole 247 of the second vertical plate 242.

[0043] For each second vertical plate 242, the outer walls of the three limiting holes of the second vertical plate 242 are fixedly connected to the limiting sleeve 244, and the limiting sleeve 244 extends in a direction away from the first vertical plate 241. Figure 1 and Figure 2 As shown, for each first bracket 22, the end of the first bracket 22 away from the first bending beam 21 is plugged into a folding limit bracket 24, and a third hole 221 and a fourth hole 222 are opened on the first bracket 22. The third hole 221 and the fourth hole 222 are distributed along the axial direction of the first bracket 22, and the hole spacing between the third hole 221 and the fourth hole 222 is equal to the hole spacing between the first hole 246 and the reference hole 245.

[0044] When the safety frame 2 needs to be unfolded and placed in a vertical state, the limiting pins 25 are inserted between the third hole 221 and the two reference holes 245 and between the fourth hole 222 and the two first holes 246, respectively, and the side wall of the first bracket 22 abuts against the vertical portion of the support bottom plate 243, and the first bracket 22 is fixed by the limiting pins 25. When the safety frame 2 needs to be folded, the limiting pins 25 inserted between the fourth hole 222 and the two first holes 246 are taken out, and the first bracket 22 is rotated along the limiting pins 25 between the third hole 221 and the two reference holes 245, so that the side wall of the first bracket 22 abuts against the horizontal portion of the support bottom plate 243, and then the limiting pins 25 are inserted into the fourth hole 222 and the two second holes 247 to complete the fixing of the first bracket 22.

[0045] The limit pin 25 is plugged into the corresponding limit sleeve 244, and the locking pin 26 passes through the limit pin 25 and the corresponding limit sleeve 244. The limit pin 25 can be fixed on the corresponding limit sleeve 244 through the locking pin 26, thereby improving the stability of the limit pin 25 and reducing the possibility of the limit pin 25 falling off.

[0046] The safety frame 2 can be folded by folding the limiting bracket 24 , the limiting pin shaft 25 and the locking pin 26 . The operation is simple and convenient, and the convenience of folding the safety frame 2 is improved.

[0047] In this embodiment, for each bracket group, rubber pads are installed on the vertical part and the horizontal part of the support bottom plate 243, and the rubber pads are in contact with the side wall of the first bracket 22. Due to the inherent elastic properties of the rubber pads, the vibration of the safety frame 2 can be reduced, the wear of the safety frame 2 can be reduced, and the noise caused by the collision between the safety frame 2 and the support bottom plate 243 can be reduced, so as to ensure that the driver can concentrate. Exemplarily, one or more M8 threaded holes for installing rubber pads are respectively opened on the vertical part and the horizontal part of the support bottom plate 243.

[0048] like Figures 1 to 4 As shown, in this embodiment, for each bracket group, a gas spring 3 is connected between the corresponding first bracket 22 and the second bracket 23. When the safety frame 2 moves between the vertical state and the folded state, the movement speed of the gas spring 3 is relatively slow, and the dynamic force is small, which can alleviate the force caused by the movement of the safety frame 2, save the driver's energy, greatly reduce the workload, and improve the work efficiency. The gas spring 3 can be installed on the inner side walls of the first bracket 22 and the second bracket 23. It is easy to understand that the side walls of the two first brackets 22 of the safety frame 2 that are close to each other are the inner side walls, and the side walls of the two second brackets 23 that are close to each other are the inner side walls. Conversely, they are the outer side walls of the first bracket 22 or the second bracket 23.

[0049] In this embodiment, for each bracket group, the second bracket 23 includes a bracket body 231, a second bent beam 232 and a connecting seat 233. One end of the bracket body 231 is fixedly connected to the lateral part of the support base plate 243 by welding or the like. The other end of the bracket body 231 away from the first bracket 22 is integrally formed with the second bent beam 232. The end of the second bent beam 232 away from the bracket body 231 is fixedly connected to the connecting seat 233. The second bent beam 232 and the connecting seat 233 can be fixedly connected by welding or the like. The connecting seat 233 can be fixedly connected to the installation location by positioning methods such as bolts.

[0050] It is easy to understand that one safety rack 2 includes two second brackets 23, that is, two connecting seats 233, and the two connecting seats 233 are respectively fixedly connected to the locations to be installed, thereby achieving the installation requirement of fixing the safety rack 2 to the location to be installed.

[0051] A plurality of reinforcing ribs 234 are fixedly connected between the second curved beam 232 and the connecting seat 233, thereby improving the connection strength and bending and torsion resistance between the second curved beam 232 and the connecting seat 233, and improving the stability and safety of the second bracket 23. In this embodiment, the second bracket 23 can be a bracket made of square steel, and the connecting seat 233 can be made of a steel plate with a thickness of 15 mm.

[0052] The first bracket 22 can provide a mounting plane for other mounting components while ensuring strength. Since the safety frame 2 is located in the middle of the vehicle body 1, in order to improve the convenience of the driver getting on and off the vehicle body 1, the two first brackets 22 corresponding to the safety frame 2 are fixedly connected with handrails 4. In this embodiment, the handrail 4 can be made of solid round steel with a diameter of 25 and fixedly connected to the outer wall of the first bracket 22 by welding.

[0053] The location to be installed can be the installation location corresponding to a vehicle such as a tractor. In order to improve the driving safety of the driver and facilitate the driver to check the surroundings of the tractor, the two first brackets 22 corresponding to the safety frame 2 are fixedly connected with rearview mirrors 5, and the rearview mirrors 5 are located above the handrails 4. In this embodiment, the rearview mirrors 5 can be fixedly connected to the outer wall of the first bracket 22 by means of bolts or the like. It is easy to understand that the rearview mirrors 5 include a left rearview mirror and a right rearview mirror. When the driver drives the vehicle, the left rearview mirror is the rearview mirror 5 on the left side of the driver, and the right rearview mirror is the rearview mirror 5 on the right side of the driver.

[0054] In this embodiment, an alarm light 6 is also installed on the safety frame 2. The alarm light 6 is located on the upper left side of the vehicle body 1 and is installed on the outer wall of the first bracket 22 above the left rearview mirror. The alarm light 6 is electrically connected to a battery, and the battery is used to power the alarm light 6. The alarm light 6 is also electrically connected to a control switch, which can be integrated on the instrument panel. When the driver needs to warn people around him, he can manually turn on the control switch and the alarm light 6 will work.

[0055] The first bracket 22 may be a hollow structure, and the wiring harness connecting the warning light 6 and the battery and the control switch is routed through the inner hollow part of the first bracket 22, thereby improving the aesthetics and neatness of the installed warning light 6. In this embodiment, the second bracket 23 and the first curved beam 21 may also be a hollow structure that can ensure strength.

[0056] Based on the same technical concept, such as Figures 1 to 6 As shown, an embodiment of the present application also discloses a tractor equipped with the above-mentioned foldable multifunctional mid-mounted safety frame, including a vehicle body 1 and the above-mentioned safety frame 2, the vehicle body 1 includes a chassis and a gearbox installed on the chassis, the gearbox is located in the middle of the vehicle body 1, and the two connecting seats 233 corresponding to the safety frame 2 are respectively fixedly connected to the gearbox.

[0057] By directly installing the safety frame 2 on the gearbox of the tractor chassis, the strength of the safety frame 2 is enhanced. Since the safety frame 2 is located in the middle of the vehicle body 1, when the tractor rolls over, the centrally placed safety frame 2 can provide a larger safety accommodation area for the driver.

[0058] In combination with the actual situation and taking into account the characteristics of automated production, in this embodiment, the safety frame 2 can be directly installed on the vehicle body 1 as a whole, thereby reducing the loading process and improving the loading quality.

[0059] When the tractor is in the driving process, the limiting pin 25 is respectively inserted between the third hole 221 of the safety frame 2 and the two reference holes 245 and between the fourth hole 222 and the two first holes 246, and the side wall of the first bracket 22 abuts against the vertical part of the support bottom plate 243, and the first bracket 22 is fixed by the limiting pin 25. When the tractor is not in operation during transportation, the limiting pin 25 inserted between the fourth hole 222 and the two first holes 246 is taken out, and the first bracket 22 is rotated along the limiting pin 25 between the third hole 221 and the two reference holes 245, so that the side wall of the first bracket 22 abuts against the horizontal part of the support bottom plate 243, and then the limiting pin 25 is inserted into the fourth hole 222 and the two second holes 247 to complete the fixing of the first bracket 22.

[0060] By folding the safety frame 2 through the folding positioning assembly, the height of the entire tractor can be lowered during transportation, which facilitates the transportation and storage of the entire tractor.

[0061] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A foldable multifunctional central safety rack, characterized in that: The invention comprises a first curved beam (21) and two bracket groups, each bracket group comprising a first bracket (22), a second bracket (23) and a folding positioning assembly for connecting the first bracket (22) and the second bracket (23) in the bracket group, the two ends of the first curved beam (21) are respectively connected to one end of a first bracket (22), and the ends of the two second brackets (23) away from the first bracket (22) are respectively fixedly connected to the places to be installed.

2. A foldable multifunctional central safety rack according to claim 1, characterized in that: For each bracket group, the folding positioning assembly comprises a folding limit bracket (24) and a limit pin (25); the folding limit bracket (24) is fixedly connected to the corresponding second bracket (23); the folding limit bracket (24) comprises a reference hole (245), a first hole (246) located in the vertical direction of the reference hole (245) and a second hole (247) located in the horizontal direction of the reference hole (245); the hole distance between the first hole (246) and the reference hole (245) is equal to the hole distance between the second hole (247) and the reference hole (245); For each bracket group, the end of the first bracket (22) away from the first bending beam (21) is plugged into the folding limit bracket (24), and the first bracket (22) is provided with a third hole (221) and a fourth hole (222) distributed along the axial direction of the first bracket (22), and the limit pin shaft (25) is respectively plugged between the third hole (221) and the reference hole (245) and between the fourth hole (222) and the first hole (246), or between the third hole (221) and the reference hole (245) and between the fourth hole (222) and the second hole (247).

3. A foldable multifunctional central safety rack according to claim 2, characterized in that: For each bracket group, the folding limit bracket (24) comprises a first vertical plate (241), a second vertical plate (242) and a supporting bottom plate (243), the supporting bottom plate (243) comprises a vertical portion and a horizontal portion, the side walls corresponding to the first vertical plate (241) and the second vertical plate (242) are respectively fixedly connected to the vertical portion, the bottom walls corresponding to the first vertical plate (241) and the second vertical plate (242) are respectively fixedly connected to the horizontal portion, and the reference hole (245), the first hole (246) and the second hole (247) are respectively opened on the first vertical plate (241) and the second vertical plate (242); For each of the bracket groups, when the limit pin (25) is respectively inserted between the third hole (221) and the reference hole (245), and between the fourth hole (222) and the first hole (246), the side wall of the first bracket (22) abuts against the vertical portion of the support base plate (243); when the limit pin (25) is respectively inserted between the third hole (221) and the reference hole (245), and between the fourth hole (222) and the second hole (247), the side wall of the first bracket (22) abuts against the horizontal portion of the support base plate (243).

4. A foldable multifunctional central safety rack according to claim 3, characterized in that: For each bracket group, rubber pads are installed on the vertical part and the horizontal part of the support base plate (243).

5. The foldable multifunctional central safety rack according to claim 1, characterized in that: For each bracket group, a gas spring (3) is connected between the first bracket (22) and the second bracket (23).

6. The foldable multifunctional central safety rack according to claim 3, characterized in that: For each of the bracket groups, the second bracket (23) comprises a bracket body (231), a second curved beam (232) and a connecting seat (233); the other end of the bracket body (231) away from the first bracket (22) is integrally formed with the second curved beam (232); one end of the bracket body (231) is fixedly connected to the transverse part of the supporting base plate (243); the end of the second curved beam (232) away from the bracket body (231) is fixedly connected to the connecting seat (233); and the connecting seat (233) is fixedly connected to the location to be installed.

7. A foldable multifunctional central safety rack according to claim 6, characterized in that: For each of the bracket groups, a plurality of reinforcing ribs (234) are fixedly connected between the second curved beam (232) and the connecting seat (233).

8. The foldable multifunctional central safety rack according to claim 1, characterized in that: The two first brackets (22) corresponding to the safety frame (2) are both fixedly connected with a handrail (4) and a rearview mirror (5), wherein the rearview mirror (5) comprises a left rearview mirror and a right rearview mirror, and an alarm light (6) is installed on the outer side wall of the first bracket (22) above the left rearview mirror.

9. A foldable multifunctional central safety rack according to claim 8, characterized in that: The first bracket (22) is a hollow structure, and the wiring harness connected to the warning light (6) is routed through the inner hollow part of the first bracket (22).

10. A tractor equipped with the foldable multifunctional mid-mounted safety frame according to any one of claims 1 to 9, characterized in that: The vehicle body (1) comprises a chassis and a gearbox mounted on the chassis, the gearbox being located in the middle of the vehicle body (1), and two second brackets (23) corresponding to the safety frame (2) being respectively fixedly connected to the gearbox at their ends away from the first bracket (22).

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