Auxiliary frame and vehicle

Abstract

The utility model discloses an auxiliary frame and a vehicle, the auxiliary frame comprises an auxiliary frame main body, a protection piece and an installation piece used for installing a protected device, and the installation piece is connected with the auxiliary frame main body; the protection piece is connected with the auxiliary frame body and comprises a fence part located on the lower side of the protected device. According to the embodiment of the utility model, the protective piece can protect the protected device, so that the protected device is prevented from being collided in the running process of the vehicle, the protected device can be prevented from being damaged, and the service life of the protected device can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a kind of vice frame and vehicle. BACKGROUND

[0002] With the development of vehicle technology, more and more advanced systems, such as air spring system, EMB (Electro-mechanical Brake, electronic mechanical brake) system, active suspension system, etc., are considered to be on board.

[0003] However, if the devices in the above systems are arranged in the lower part of the whole vehicle, for example, if the active suspension hydraulic pump in the active suspension system is arranged in the lower part of the whole vehicle, it is easy to be bumped during vehicle driving, thereby causing damage to the devices. SUMMARY

[0004] The utility model provides a kind of vice frame and vehicle, it aims at at least solve the technical problem that device in the above system in prior art is arranged in the lower part of the whole vehicle, it is easy to be bumped during vehicle driving, thereby causing damage to the devices.

[0005] In the first aspect of the utility model implementation, first provide a kind of vice frame, comprising:

[0006] Vice frame main body;

[0007] Mounting piece for mounting protected device, the mounting piece is connected with the vice frame main body;

[0008] Protective piece, connected with the vice frame main body, the protective piece includes the fence portion located in the lower side of the protected device.

[0009] Optionally, the fence portion includes at least one protective beam, and the protective beam has an energy-absorbing cavity.

[0010] Optionally, at least one of the protective beams includes a first protective beam and a second protective beam, the first protective beam is located on one side of the second protective beam close to the front end of the vice frame main body, and the first protective beam is inclinedly arranged along the width direction of the vice frame main body.

[0011] Optionally, along the width direction of the vice frame main body, the lower end of the first protective beam is closer to the second protective beam than the upper end.

[0012] Optionally, the protective piece further includes two connecting brackets, the two connecting brackets are respectively connected to the two ends of the protective beam, and the connecting bracket is detachably connected with the vice frame main body.

[0013] Optionally, the connecting bracket has a matching notch, and an end of the protective beam comprises a connecting half-end, which is welded with an inner wall of the matching notch.

[0014] An area of a cross section of the connecting half-end perpendicular to a length direction of the protective beam is greater than or equal to 0.5 times an area of a cross section of the end of the protective beam perpendicular to the length direction of the protective beam.

[0015] Optionally, the connecting bracket comprises a side plate, and the matching notch is formed in the side plate.

[0016] The connecting bracket further comprises a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are connected to two sides of the side plate along a thickness direction of the side plate, respectively, and the first connecting plate and the second connecting plate are located at two ends of the side plate along a length direction of the side plate, respectively.

[0017] Optionally, an edge of the side plate is provided with a first flange.

[0018] And / or, edges of the first connecting plate and the second connecting plate are provided with a second flange.

[0019] Optionally, a wall thickness of the side plate is greater than or equal to 2.5 mm and less than or equal to 3.5 mm.

[0020] And / or, wall thicknesses of the first connecting plate and the second connecting plate are greater than or equal to 2.5 mm and less than or equal to 3.5 mm.

[0021] Optionally, a wall thickness of the protective beam is greater than or equal to 2 mm and less than or equal to 3 mm.

[0022] And / or, a shape of a cross section of the energy-absorbing cavity perpendicular to the length direction of the protective beam is square, a first side length of the cross section of the energy-absorbing cavity perpendicular to the length direction of the protective beam is greater than or equal to 10 mm and less than or equal to 20 mm, and a second side length of the cross section of the energy-absorbing cavity perpendicular to the length direction of the protective beam is greater than or equal to 30 mm and less than or equal to 50 mm.

[0023] Optionally, the auxiliary frame body comprises a first mounting column, a first threaded hole is formed in the first mounting column, and the connecting bracket is threadedly connected with the first threaded hole through a first threaded fastener.

[0024] In a second aspect of the embodiment of the utility model, a vehicle is further provided, which comprises the auxiliary frame and the protected device mounted on the auxiliary frame.

[0025] In the embodiment of the utility model, if encountering ground protrusions in the process of vehicle driving, the blocking part in the protection part can effectively block the ground protrusions from impacting or scratching the protected device, therefore, the protection part can protect the protected device to avoid the protected device from being bumped in the process of vehicle driving, thereby the protected device can be prevented from being damaged and the service life of the protected device can be prolonged. In addition, the protected device can be firmly installed on the auxiliary frame body through the mounting part to ensure the stability of the protected device in the process of vehicle driving. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows.

[0027] Figure 1 The structural schematic diagram of the auxiliary frame and the protected device provided in the embodiment of the utility model is shown in the figure.

[0028] Figure 2 The structural schematic diagram of the auxiliary frame provided in the embodiment of the utility model is shown in the figure.

[0029] Figure 3 The three-dimensional structural schematic diagram of the protection part in the auxiliary frame provided in the embodiment of the utility model is shown in the figure.

[0030] Figure 4 The sectional structural schematic diagram of the protection part in the auxiliary frame provided in the embodiment of the utility model is shown in the figure.

[0031] Figure 5 The structural schematic diagram of the connecting support in the auxiliary frame provided in the embodiment of the utility model is shown in the figure.

[0032] Figure 6 The structural schematic diagram of the auxiliary frame body in the auxiliary frame provided in the embodiment of the utility model is shown in the figure.

[0033] Reference signs:

[0034] 1-protection part, 11-protection beam, 111-first protection beam, 112-second protection beam, 113-energy absorption cavity, 114-connecting half end, 12-connecting support, 121-matching notch, 122-side plate, 123-first connecting plate, 124-second connecting plate, 125-first flange, 126-second flange, 2-mounting part, 3-auxiliary frame body, 31-front cross beam, 32-first mounting column, 4-protected device. DETAILED DESCRIPTION

[0035] The technical scheme in the embodiment of the utility model will be described in combination with the drawings in the embodiment of the utility model.

[0036] The embodiments of the utility model are used for explaining the utility model only, and are not used for limiting the range of the utility model. In the following paragraphs, the utility model is described more specifically by way of example with reference to the drawings. It should be noted that the drawings are in a very simplified form and all use non-precise proportions, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the utility model.

[0037] In the related art, if a high-value device is arranged at the lower part of the whole vehicle, for example, if a main suspension hydraulic pump in a main suspension system is arranged at the lower part of the whole vehicle, the device is prone to be damaged due to being knocked during the driving of the vehicle. In order to solve the above problem, the utility model embodiment provides a subframe and a vehicle, and the following specifically describes the subframe and the vehicle mentioned above.

[0038] In the first aspect, with reference to Figure 1 The subframe provided by the utility model embodiment comprises a subframe main body 3, a protection piece 1, a mounting piece 2 for mounting a protected device 4, the mounting piece 2 is connected with the subframe main body 3, the protection piece 1 is connected with the subframe main body 3, and the protection piece 1 comprises a fence part located at the lower side of the protected device 4.

[0039] The connection mode of the protected device 4 and the mounting piece 2 can be bolt connection. The connection mode of the mounting piece 2 and the subframe main body 3 can be welding, bolt connection, etc. The subframe main body 3 comprises a front cross beam 31, and the mounting piece 2 is preferably connected to the front cross beam 31, and at this time, the protected device 4 is located at the lower side of the front cross beam 31. The number of the mounting piece 2 can be set according to actual needs, for example, it can be set to one, two, three, etc. The number of the mounting piece 2 is preferably two, and the two mounting pieces 2 are connected with two ends of the protected device 4 respectively.

[0040] The connection mode of the protection piece 1 and the subframe main body 3 can be welding, bolt connection, etc. The material of the protection piece 1 can be set according to actual needs, for example, it can be set to high-strength steel, aluminum alloy, etc. The material of the protection piece 1 is preferably S420MC high-strength low-alloy steel. The main suspension system in the vehicle is divided into a hydraulic main suspension system, an air main suspension system, an electromagnetic main suspension system, etc., and the hydraulic main suspension system usually comprises a main suspension hydraulic pump. The protected device 4 is specifically a main suspension hydraulic pump. It should be noted that the up, down, front and rear directions involved in the embodiment are consistent with the up, down, front and rear directions of the vehicle.

[0041] In the vehicle driving process, if a ground protrusion is encountered, the blocking part in the protection piece 1 can effectively block the ground protrusion from impacting or scratching the protected device 4, therefore, the protection piece 1 can protect the protected device 4, so as to avoid the protected device 4 from being bumped in the vehicle driving process, thereby the protected device 4 can be prevented from being damaged, and the service life of the protected device 4 can be prolonged. In addition, the protected device 4 can be firmly installed on the auxiliary frame body 3 through the mounting piece 2, so as to ensure the stability of the protected device 4 in the vehicle driving process.

[0042] The active suspension hydraulic pump is a high-value part, and in the normal driving process of the vehicle, the active suspension hydraulic pump arranged at the lower part of the vehicle is easy to be bumped, thereby the active suspension hydraulic pump is at risk of being damaged. For the vehicle including the hydraulic active suspension system, how to arrange and protect the active suspension hydraulic pump is a difficult problem. In the embodiment, when the protected device 4 is the active suspension hydraulic pump, the active suspension hydraulic pump can be installed on the auxiliary frame body 3 through the mounting piece 2, and the active suspension hydraulic pump can be protected through the protection piece 1, so as to avoid the active suspension hydraulic pump from being bumped in the vehicle driving process. In the vehicle driving process, if a ground protrusion is encountered, the ground protrusion directly impacts or scratches the protection piece 1, and the active suspension hydraulic pump will not be damaged.

[0043] In an optional embodiment of the utility model, referring to Figures 1 to 4 The blocking part includes at least one protection beam 11, and the protection beam 11 has an energy absorption cavity 113. The number of the protection beams 11 included in the protection piece 1 can be set according to actual requirements, for example, one, two, three or the like. The number of the protection beams 11 is preferably two. The shape of the cross section of the protection beam 11 perpendicular to the length direction of the protection beam 11 is preferably square, and the square cross section structure is symmetrical, and the bending stiffness and the compressive strength are excellent when external impact or pressure is borne, thereby the protection beam 11 can meet the strength requirement under complex working conditions.

[0044] The shape of the cross section of the energy absorption cavity 113 perpendicular to the length direction of the protection beam 11 can be square, circular or the like. The energy absorption cavity 113 preferably penetrates the protection beam 11 along the length direction of the protection beam 11. In the embodiment, the energy absorption cavity 113 plays an energy absorption role, and when the protection beam 11 collides with the ground protrusion, the protection beam 11 deforms itself to absorb the collision energy, thereby the collision energy can be effectively prevented from being transmitted to the protected device 4, and the risk of the protected device 4 being damaged can be reduced.

[0045] In an optional embodiment of the utility model, referring to Figure 1The at least one protection beam 11 comprises a first protection beam 111 and a second protection beam 112, the first protection beam 111 is located at one side of the second protection beam 112 close to the front end of the auxiliary frame body 3, and the first protection beam 111 is arranged in a tilt manner along the width direction of the auxiliary frame body 3.

[0046] The width direction of the auxiliary frame body 3 is parallel to the length direction of the vehicle, and the width direction of the auxiliary frame body 3 can refer to the direction shown by the arrow A in Figure 1 and Figure 2 . The front end of the auxiliary frame body 3 is one end of the auxiliary frame body 3 where the front cross beam 31 is located. The second protection beam 112 is horizontally arranged, the second protection beam 112 is located directly below the protected device 4, and the included angle between the lower surface of the first protection beam 111 and the horizontal plane where the second protection beam 112 is located can be 120-150 degrees. In the embodiment, the first protection beam 111 located at the front side is arranged in a tilt manner, which can protect the front lower side of the protected device 4 and avoid that a higher ground protrusion directly hits the protected device 4 from the front side of the protected device 4.

[0047] In an optional embodiment of the utility model, referring to Figure 3 , the protection piece 1 further comprises two connecting brackets 12, the two connecting brackets 12 are connected at the two ends of the protection beam 11 respectively, and the connecting bracket 12 is detachably connected with the auxiliary frame body 3. The connecting mode of the protection beam 11 and the connecting bracket 12 can be welding, bolt connection and the like. The connecting mode of the connecting bracket 12 and the auxiliary frame body 3 can be bolt connection. In the embodiment, the two connecting brackets 12 are connected at the two ends of the protection beam 11 respectively, so that the overall structure of the protection piece 1 is relatively stable. In addition, the connecting bracket 12 is detachably connected with the auxiliary frame body 3, which facilitates the disassembly and replacement of the protection piece 1.

[0048] In an optional embodiment of the utility model, referring to Figure 4 and Figure 5 , the connecting bracket 12 has a matching notch 121, the end of the protection beam 11 comprises a connecting half end 114, the connecting half end 114 is welded with the inner wall of the matching notch 121, and the area of the section of the connecting half end 114 perpendicular to the length direction of the protection beam 11 is greater than or equal to 0.5 times the area of the section of the end of the protection beam 11 perpendicular to the length direction of the protection beam 11.

[0049] The welding mode of the inner wall of the connecting half end 114 and the matching notch 121 can be carbon dioxide gas shielded welding. When the number of the protective beams 11 is two, the connecting support 12 has two matching notches 121, and the inner walls of the two matching notches 121 are welded with the two protective beams 11 respectively. The shape of the matching notch 121 matches the shape of the connecting half end 114. Through the setting of the matching notch 121, the protective beam 11 can be firmly clamped on the connecting support 12.

[0050] In the embodiment, the protective beam 11 is welded with the inner wall of the matching notch 121 to form a firm joint, which can improve the overall strength of the protective part 1. In addition, the area of the cross section of the connecting half end 114 perpendicular to the length direction of the protective beam 11 is greater than or equal to 0.5 times the area of the cross section of the end of the protective beam 11 perpendicular to the length direction of the protective beam 11, which can ensure sufficient contact between the protective beam 11 and the connecting support 12, improve the connection strength between the protective beam 11 and the connecting support 12, and further improve the overall strength of the protective part 1.

[0051] In an optional embodiment of the utility model, referring to Figure 5 The connecting support 12 comprises a side plate 122, and the matching notch 121 is arranged on the side plate 122. The connecting support 12 further comprises a first connecting plate 123 and a second connecting plate 124, and the first connecting plate 123 and the second connecting plate 124 are connected to the two sides of the side plate 122 along the thickness direction of the side plate 122 respectively. The first connecting plate 123 and the second connecting plate 124 are located at the two ends of the side plate 122 along the length direction of the side plate 122 respectively.

[0052] The first connecting plate 123 and the second connecting plate 124 are both smoothly connected to the side plate 122 through an arc. In the embodiment, the first connecting plate 123 and the second connecting plate 124 on the two sides of the side plate 122 provide two mounting points for the connection between the connecting support 12 and the auxiliary frame body 3, which can ensure the connection reliability and stability of the connecting support 12 and the auxiliary frame body 3. The first connecting plate 123 and the second connecting plate 124 are both provided with mounting holes. The mounting holes are used for the penetration of the first threaded fasteners. The first connecting plate 123 and the second connecting plate 124 are located at the two sides of the side plate 122 along the thickness direction of the side plate 122, which can provide sufficient mounting space for the installation of the first threaded fasteners.

[0053] In an optional embodiment of the utility model, referring to Figure 5 The edge of the side plate 122 is provided with a first flange 125, and / or the edge of the first connecting plate 123 and the second connecting plate 124 is provided with a second flange 126. Through the setting of the first flange 125 and the second flange 126, the overall strength of the connecting support 12 can be improved.

[0054] Preferably, the side plate 122 is provided with a first flange 125 along two side edges of the side plate 122 in the length direction thereof, and a side edge of the side plate 122 away from the first connecting plate 123 in the width direction thereof. The first connecting plate 123 is provided with a second flange 126 along a side edge of the side plate 122 away from the second connecting plate 124 in the length direction thereof. The second connecting plate 124 is provided with a second flange 126 along a side edge of the side plate 122 away from the first connecting plate 123 in the length direction thereof. The length direction of the side plate 122 can refer to the direction indicated by the arrow B in the drawings, and the width direction of the side plate 122 is perpendicular to the length direction and the thickness direction thereof. Figure 5

[0055] The first flange 125 comprises a first arc segment and a first straight wall segment, the radius of the first arc segment can be 3mm, and the width of the first straight wall segment can be 2.5mm, so as to save materials and improve the strength. The second flange 126 comprises a second arc segment and a second straight wall segment, the radius of the second arc segment can be 3mm, and the width of the second straight wall segment can be 2.5mm, so as to save materials and improve the strength.

[0056] In an optional embodiment of the utility model, the wall thickness of the side plate 122 is greater than or equal to 2.5mm and less than or equal to 3.5mm, and / or the wall thickness of the first connecting plate 123 and the second connecting plate 124 is greater than or equal to 2.5mm and less than or equal to 3.5mm.

[0057] The wall thickness of the side plate 122 can be 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, etc. The wall thickness of the side plate 122 is preferably 3mm. The wall thickness of the first connecting plate 123 can be 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, etc. The wall thickness of the first connecting plate 123 is preferably 3mm. The wall thickness of the second connecting plate 124 can be 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, etc. The wall thickness of the second connecting plate 124 is preferably 3mm. In the embodiment, when the wall thicknesses of the side plate 122, the first connecting plate 123 and the second connecting plate 124 are within the above range, the strength of the connecting bracket 12 can be ensured, and the overall strength of the protection piece 1 can be ensured.

[0058] In an optional embodiment of the utility model, the wall thickness of the protection beam 11 is greater than or equal to 2mm and less than or equal to 3mm, and / or the cross section of the energy-absorbing cavity 113 perpendicular to the length direction of the protection beam 11 is square, the first side length of the cross section of the energy-absorbing cavity 113 perpendicular to the length direction of the protection beam 11 is greater than or equal to 10mm and less than or equal to 20mm, and the second side length of the cross section of the energy-absorbing cavity 113 perpendicular to the length direction of the protection beam 11 is greater than or equal to 30mm and less than or equal to 50mm. ​

[0059] The wall thickness of the protective beam 11 can be 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, etc. The wall thickness of the protective beam 11 is preferably 2.5 mm. When the wall thickness of the protective beam 11 is within the above range, the strength of the protective beam 11 can be ensured, and thus the overall strength of the protection member 1 can be ensured. The first side length of the cross section of the energy absorption cavity 113 perpendicular to the length direction of the protective beam 11 can be 10 mm, 13 mm, 15 mm, 18 mm, 20 mm, etc. The first side length of the cross section of the energy absorption cavity 113 perpendicular to the length direction of the protective beam 11 is preferably 15 mm. The second side length of the cross section of the energy absorption cavity 113 perpendicular to the length direction of the protective beam 11 can be 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, etc. The second side length of the cross section of the energy absorption cavity 113 perpendicular to the length direction of the protective beam 11 is preferably 40 mm. When the size of the energy absorption cavity 113 is within the above range, the energy absorption effect can be ensured, and meanwhile the volume occupied by the protective beam 11 can be reduced.

[0060] In an optional embodiment of the present application, referring to Figure 6 The auxiliary frame body 3 comprises a first mounting column 32, a first threaded hole is formed in the first mounting column 32, and the connecting bracket 12 is threadedly connected with the first threaded hole through a first threaded fastener.

[0061] The first mounting column 32 is specifically arranged on the front cross beam 31. The number of the first mounting columns 32 is four, and the four first mounting columns 32 are respectively located at two ends of the front cross beam 31. The first connecting plate 123 and the second connecting plate 124 in a single connecting bracket 12 are respectively connected with two first mounting columns 32 located at the same end of the front cross beam 31. The first threaded fastener can be a bolt. The auxiliary frame body 3 further comprises a second mounting column, a second threaded hole is formed in the second mounting column, and the mounting member 2 is threadedly connected with the second threaded hole through a second threaded fastener. The second mounting column is specifically arranged on the front cross beam 31. The second threaded fastener can be a bolt. In the present embodiment, the connecting bracket is threadedly connected with the first threaded hole through the first threaded fastener, and the connection reliability is high.

[0062] In the second aspect, the present application provides a vehicle, which comprises the auxiliary frame provided in the first aspect and a protected device 4 mounted on the auxiliary frame. The auxiliary frame comprises an auxiliary frame body 3, a protection member 1, and a mounting member 2 for mounting the protected device 4. The mounting member 2 is connected with the auxiliary frame body 3, the protection member 1 is connected with the auxiliary frame body 3, and the protection member 1 comprises an enclosure part located at the lower side of the protected device 4.

[0063] The vehicle further comprises a hydraulic active suspension system, and the protected device 4 is specifically an active suspension hydraulic pump in the hydraulic active suspension system.

[0064] Since the vehicle includes the above-mentioned subframe, the vehicle also has the beneficial effects of the above-mentioned subframe, which will not be repeated here.

[0065] It is to be noted that the relative terms such as first and second, and the like, are used herein only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more limitations, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0066] It is to be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as "connected" to another component, it can be directly connected to the other component or there can be intervening components. When a component is referred to as "disposed" on another component, it can be directly on the other component or there can be intervening components. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are used for illustrative purposes only.

[0067] Each of the embodiments in the specification is described in a relevant manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0068] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

[0069] The above has carried on the detailed introduction to the subframe and the vehicle provided by the present application, the principle and the implementation mode of the present application have been described in the text by applying specific examples, the above embodiment explanation is only for helping understanding the structure of the present application and its core idea, simultaneously, for the general technical personnel of the field, according to the idea of the present application, in the specific implementation mode and the application range, there will be the change, on the whole, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A subframe characterized by, The subframe body comprises: a mounting member for mounting a protected device, the mounting member being connected to the subframe body; a protection member connected to the subframe body, the protection member comprising a barrier portion located on the lower side of the protected device. The barrier portion comprises at least one protection beam having an energy absorption cavity.

2. The subframe of claim 1, wherein The at least one protection beam comprises a first protection beam and a second protection beam, the first protection beam being located on the side of the second protection beam close to the front end of the subframe body, and the first protection beam being arranged obliquely along the width direction of the subframe body.

3. The subframe of claim 2, wherein The lower end of the first protection beam is closer to the second protection beam than the upper end along the width direction of the subframe body.

4. The subframe of claim 3, wherein The protection member further comprises two connecting brackets, each of which is connected to the two ends of the protection beam, and the connecting brackets are detachably connected to the subframe body.

5. The subframe of claim 2, wherein The connecting bracket has a matching notch, and the end portion of the protection beam comprises a connecting half-end portion, which is welded to the inner wall of the matching notch.

6. The subframe of claim 5, wherein The area of the cross section of the connecting half-end portion perpendicular to the length direction of the protection beam is greater than or equal to 0.5 times the area of the cross section of the end portion of the protection beam perpendicular to the length direction of the protection beam. The connecting bracket comprises a side plate, and the matching notch is formed in the side plate.

7. The subframe of claim 6, wherein The connecting bracket further comprises a first connecting plate and a second connecting plate, each of which is connected to the two sides of the side plate along the thickness direction of the side plate, and each of which is located at the two ends of the side plate along the length direction of the side plate. The edge of the side plate is provided with a first flange; 8. The subframe of claim 7, wherein and / or, the edge of the first connecting plate and the second connecting plate is provided with a second flange. The wall thickness of the side plate is greater than or equal to 2.5 mm and less than or equal to 3.5 mm; 9. The subframe of claim 7, wherein and / or, the wall thickness of the first connecting plate and the second connecting plate is greater than or equal to 2.5 mm and less than or equal to 3.5 mm. The wall thickness of the protection beam is greater than or equal to 2 mm and less than or equal to 3 mm; 10. Subframe according to any one of claims 2 to 9, characterized in that and / or, the cross section of the energy absorption cavity perpendicular to the length direction of the protection beam is square, the first side length of the cross section of the energy absorption cavity perpendicular to the length direction of the protection beam is greater than or equal to 10 mm and less than or equal to 20 mm, and the second side length of the cross section of the energy absorption cavity perpendicular to the length direction of the protection beam is greater than or equal to 30 mm and less than or equal to 50 mm. The subframe body comprises a first mounting column, a first threaded hole is formed in the first mounting column, and the connecting bracket is threadedly connected to the first threaded hole through a first threaded fastener.

11. Subframe according to any one of claims 5 to 9, characterized in that The subframe and the protected device mounted on the subframe as claimed in any one of claims 1 to 11 are included.

12. A vehicle characterized by comprising: ​

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