Vehicle tail protection device and vehicle

Abstract

The utility model discloses a vehicle tail protection device and a vehicle, the vehicle tail protection device comprises a mounting frame, an anti-collision frame and a limiting lock, the mounting frame is arranged at the vehicle tail and is provided with a hinging part, a first positioning hole and a second positioning hole; the anti-collision frame is arranged on the mounting frame in a swinging and rotating mode through a hinge part and can conduct deflection switching between a storage position and a protection position, the limiting lock is arranged on the anti-collision frame and is provided with a lock cylinder which is arranged in a telescopic mode, and the lock cylinder can correspondingly penetrate into the first positioning hole so that the anti-collision frame can be kept at the storage position, or the lock cylinder correspondingly penetrates into the second positioning hole so that the anti-collision frame can be protected. The anti-collision frame of the vehicle tail protection device can be selectively switched between the storage state and the protection state, so that the vehicle can adapt to more working conditions, and the switching operation is convenient and labor-saving.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle safety technology, specifically relating to a rear-end protection device and a vehicle. Background Technology

[0002] Concrete mixer trucks, trucks, trailers, and some large buses with a gross vehicle weight of 3.5 tons or more must be equipped with rear underrun protection devices to protect the occupants and cargo of vehicles behind them in the event of a rear-end collision, thereby reducing the severity of the accident. Conventional rear underrun protection devices are usually fixedly installed at the rear of the vehicle. When a vehicle is climbing a hill or needs to approach other vehicles for some reason, the rear underrun protection device may collide with the road surface or other vehicles. To avoid this problem, patent CN201211876Y discloses a manually retractable rear underrun protection device. However, this device uses a limiting pin for positioning. Before adjusting the rear bumper, the limiting pin must be removed, and then reinstalled, making disassembly and assembly difficult, time-consuming, and labor-intensive. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this utility model provides a rear-end protection device and vehicle, which aims to solve the technical problems.

[0004] To achieve the above objectives, the first aspect of this utility model provides a rear-end protection device, wherein the rear-end protection device includes a mounting bracket, a crash barrier, and a limiting lock; the mounting bracket is disposed at the rear of the vehicle and is provided with a hinge portion, a first positioning hole, and a second positioning hole; the crash barrier is rotatably disposed on the mounting bracket via the hinge portion and can be deflected and switched between a retractable position and a protective position; the limiting lock is disposed on the crash barrier and has a retractable lock cylinder, the lock cylinder can be inserted into the first positioning hole to keep the crash barrier in the retracted position, or the lock cylinder can be inserted into the second positioning hole to keep the crash barrier in the protective position.

[0005] In this embodiment of the utility model, the rear protection device further includes a limiting block. The limiting block is disposed on the mounting bracket and has a first limiting surface and a second limiting surface. The first limiting surface is used to abut against the anti-collision bracket that has been deflected to the storage position so that the lock cylinder is aligned with the first positioning hole. The second limiting surface is used to abut against the anti-collision bracket that has been deflected to the protection position so that the lock cylinder is aligned with the second positioning hole.

[0006] In this embodiment of the utility model, the first positioning hole and the second positioning hole are both located on the front side of the hinge portion, and the second positioning hole is located on the upper side of the hinge portion and the first positioning hole. The limiting block is located on the rear side of the hinge portion and has a first limiting surface facing forward and a second limiting surface facing downward. The anti-collision frame includes a frame body and a connecting plate. The connecting plate is disposed on the frame body and forms a deflection limiting surface. The deflection limiting surface can fit against the limiting block and is deflected between the first limiting surface and the second limiting surface.

[0007] In this embodiment of the utility model, the connecting plate includes a splicing part and a locking part connected in sequence. The splicing part is provided on the frame body and has a hinge hole that penetrates the frame body. The locking part extends out of the frame body and can be used for setting a limit lock. The splicing part is used to form a deflection limiting surface on the side facing the limit block.

[0008] In this embodiment of the utility model, the deflection limiting surface is provided in sequence with a third limiting surface, an arc surface and a fourth limiting surface in the extension direction of the self-locking part toward the splicing part. The third limiting surface can be fitted with the first limiting surface when it is in the protective position, and the fourth limiting surface can be fitted with the second limiting surface when it is in the storage position. The arc surface extends along the second circumference with the central axis of the hinge hole as the center line.

[0009] In this embodiment of the invention, the splicing part has a weight reduction notch on the side away from the deflection limiting surface.

[0010] In this embodiment of the invention, the second limiting surface is located above the central axis of the hinge portion, and the second limiting surface is inclined downward in the direction from front to back.

[0011] In this embodiment of the utility model, the limiting lock includes a lock cylinder, a spring, and a lock core. One end of the lock cylinder is open and connected to a bumper. The other end of the lock cylinder has an inner end face. The lock core passes through the lock cylinder and has a stepped surface facing the inner end face. The spring elastically abuts against the inner end face and the stepped surface respectively.

[0012] In this embodiment of the utility model, one end of the lock cylinder extends out of the lock cylinder from the inner end face and forms a connecting part. The limit lock also includes a handle seat, which is hinged to the connecting part, and the hinge point between the handle seat and the connecting part is offset relative to the center point of the handle seat.

[0013] In this embodiment of the utility model, the mounting bracket includes a first mounting plate and a second mounting plate welded together. The first mounting plate has a plurality of bolt holes for connecting the vehicle frame. The second mounting plate has a hinge portion and a first positioning hole and a second positioning hole. A limiting block is provided on the second mounting plate.

[0014] In this embodiment of the utility model, the first mounting plate is bent on both sides along the front-back direction to form a first bent portion and a second bent portion, and the second mounting plate is bent on both sides along the up-down direction to form a third bent portion and a fourth bent portion. The third bent portion forms a first slot and a second slot for the first bent portion and the second bent portion to be inserted into one-to-one, and the fourth bent portion abuts against the lower end of the first mounting plate.

[0015] To achieve the above objectives, a second aspect of this utility model provides a vehicle, wherein the vehicle includes the aforementioned rear protective device.

[0016] Through the above technical solution, the rear-end protection device provided by this utility model embodiment has the following beneficial effects:

[0017] When a vehicle uses the aforementioned rear-end protection device, which includes a mounting bracket, a crash bar, and a limiting component, the crash bar is typically positioned in the protective position, with the limiting lock cylinder inserted into the first positioning hole. In cases where the crash bar needs to be retracted, the limiting lock cylinder can be removed from the first positioning hole, allowing the crash bar to rotate freely. The crash bar is then rotated to the retracted position, and finally, the limiting lock cylinder is inserted into the second positioning hole to secure the crash bar. This allows the crash bar of the rear-end protection device to switch between a retracted and protective state, enabling the vehicle to adapt to more operating conditions. Furthermore, since the limiting lock is located on the crash bar, it eliminates the need for pin removal and installation compared to existing technologies, saving operation time.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the anti-collision frame of the rear protection device in the protective position according to one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the rear-end protection device of the present invention in the stowed position according to one embodiment of the present invention;

[0022] Figure 3 This is a partial structural schematic diagram of a vehicle rear protection device according to one embodiment of the present utility model;

[0023] Figure 4 This is a structural schematic diagram of the mounting bracket according to one embodiment of the present utility model;

[0024] Figure 5 This is a structural schematic diagram of the connecting plate according to one embodiment of the present utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the limiting block according to one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the cooperation between the connecting plate and the limiting block at different deflection angles according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the limit lock operating in the extended state according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the limit lock operating in the retracted state according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures

[0030] 1 Mounting bracket 11 First mounting plate

[0031] 111 Bolt hole; 112 First bend.

[0032] 113 Second bend 12 Second mounting plate

[0033] 121 Hinge part; 122 First positioning hole

[0034] 123 Second positioning hole; 124 Third bend.

[0035] 125 Fourth bend 126 First groove

[0036] 127 Second slot 2 Anti-collision frame

[0037] 21 Connecting plate 211 Locking part

[0038] 212 Splicing section 213 Third limiting surface

[0039] 214 Arc surface 215 Fourth limiting surface

[0040] 216 Weight Reduction Notch 3 Limit Lock

[0041] 31 Lock cylinder 311 Inner end face

[0042] 32 Spring 33 Lock cylinder

[0043] 331 Step surface 34 Handle seat

[0044] 341 Hinge point 4 Limit block

[0045] 41 First limiting surface 42 Second limiting surface Detailed Implementation

[0046] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0047] The following is a reference appendix. Figures 1 to 9This invention describes the rear-end protection device and vehicle of the present invention, and uses the application of the rear-end protection device to a concrete mixer truck as an example for illustration.

[0048] like Figure 1 and Figure 3 As shown, this utility model provides a rear-end protection device, wherein the rear-end protection device includes:

[0049] Mounting bracket 1 is located at the rear of the vehicle and is provided with hinge 121, first positioning hole 122 and second positioning hole 123;

[0050] The anti-collision frame 2 is rotatably mounted on the mounting frame 1 via the hinge 121 and can be deflected and switched between the storage position and the protective position;

[0051] Limit lock 3 is provided on the anti-collision frame 2 and has a retractable lock cylinder 33. The lock cylinder 33 can be inserted into the first positioning hole 122 to keep the anti-collision frame 2 in the storage position, or the lock cylinder 33 can be inserted into the second positioning hole 123 to keep the anti-collision frame 2 in the protective position.

[0052] When a vehicle uses the aforementioned rear-end protection device, since the rear-end protection device includes a mounting bracket 1, a crash barrier 2, and a limit lock 3, the crash barrier 2 is generally installed... Figure 1 In the protective position shown, the lock cylinder 33 of the limit lock 3 passes through the first positioning hole 122; when it is necessary to partially store the anti-collision bracket 2, the lock cylinder 33 of the limit lock 3 can be removed from the first positioning hole 122, so that the anti-collision bracket 2 is in a freely rotatable state, and then the anti-collision bar is swung to... Figure 2 As shown in the diagram, the lock cylinder 33 of the limit lock 3 is finally inserted into the second positioning hole 123 to complete the fixation of the crash barrier 2. This allows the crash barrier 2 of the rear protection device to switch between a retracted state and a protective state, enabling the vehicle to adapt to more working conditions. Furthermore, since the limit lock 3 is located on the crash barrier 2, the pin removal and installation process is eliminated compared to existing technologies, saving operation time.

[0053] Specifically, see Figure 1 and Figure 2 The number of mounting brackets 1 is two, and the two mounting brackets 1 are arranged at intervals along the width direction of the vehicle. The anti-collision frame 2 has two connecting beams and one anti-collision beam, and the two connecting beams are hinged to one mounting bracket 1 respectively. Of course, in other embodiments of this utility model, the number of mounting brackets 1 can be set to one or more, and the number of connecting beams of the anti-collision frame 2 can be adjusted accordingly.

[0054] Specifically, the hinge portion 121 is a combination of a pin hole and a pin, which facilitates assembly and disassembly. In other embodiments, the hinge portion 121 may also be a crossbar structure integrally formed with the mounting bracket.

[0055] like Figure 1 and Figure 2 As shown in this embodiment of the invention, the rear protection device further includes a limiting block 4. The limiting block 4 is mounted on the mounting bracket 1 and has a first limiting surface 41 and a second limiting surface 42. The first limiting surface 41 abuts against the anti-collision frame 2 when it is deflected to the storage position, so that the lock cylinder 33 is aligned with the first positioning hole 122. The second limiting surface 42 abuts against the anti-collision frame 2 when it is deflected to the protective position, so that the lock cylinder 33 is aligned with the second positioning hole 123. When the first limiting surface 41 of the limiting block 4 abuts against the anti-collision frame 2, the anti-collision frame 2 is in the storage position and the lock cylinder 33 is aligned with the first positioning hole 122. When the second limiting surface 42 of the limiting block 4 abuts against the anti-collision frame 2, the anti-collision frame 2 is in the protective position and the lock cylinder 33 is aligned with the second positioning hole 123. By setting the limiting block 4, the lock cylinder 33 can be quickly aligned with the positioning hole, and the anti-collision frame 2 can be supported, making the position switching operation of the anti-collision frame 2 more convenient and effortless.

[0056] like Figure 4 As shown in this embodiment of the invention, the first positioning hole 122 and the second positioning hole 123 are both located on the front side of the hinge portion 121, and the second positioning hole 123 is located on the upper side of the hinge portion 121 and the first positioning hole 122. The limiting block 4 is located on the rear side of the hinge portion 121 and has a first limiting surface 41 facing forward and a second limiting surface 42 facing downward. The anti-collision frame 2 includes a frame body and a connecting plate 21. The connecting plate 21 is disposed on the frame body and forms a deflection limiting surface. The deflection limiting surface can fit against the limiting block 4 and is deflected between the first limiting surface 41 and the second limiting surface 42. By designing the positions of the limiting block 4, the first positioning hole 122 and the second positioning hole 123, the anti-collision frame 2 can be limited in two positions by setting only one limiting block 4, effectively reducing material and processing costs.

[0057] See Figure 7 When the connecting plate 21 is in position a, the limiting block 4 restricts the connecting plate 21 from rotating clockwise around the hinge part 121, and the connecting plate 21 can only rotate counterclockwise. After passing position b, it reaches position c, at which point the limiting block 4 restricts the connecting plate 21 from rotating counterclockwise around the hinge part 121, and the connecting plate 21 can only rotate clockwise. It should be noted that... Figure 7 The diagram shows the deflection state of the left connecting plate 21. The deflection state of the right connecting plate 21 at different positions is the same as that of the left connecting plate 21, and will not be described again here.

[0058] Of course, this utility model is not limited to this. The number of limiting blocks 4 can also be set to two. One limiting block 4 is set on the front side of the second connecting hole and forms a downward second limiting surface 42. The other limiting block 4 is set on the front side of the first connecting hole and forms a rearward first limiting surface 41.

[0059] like Figure 5 As shown in this embodiment of the invention, the connecting plate 21 includes a splicing part 212 and a locking part 211 connected in sequence. The splicing part 212 is disposed on the frame body and has a hinge hole that penetrates the frame body. The locking part 211 extends out of the frame body and can be used to install the limiting lock 3. The splicing part 212 is used to form a deflection limiting surface on the side facing the limiting block 4. The extended splicing part 212 allows for more flexible angle adjustment space when it cooperates with the limiting block 4, and more accurately determines the position of the deflection limiting surface according to actual needs, so as to better meet the angle requirements of the rear protection device under different vehicle models or working conditions.

[0060] like Figure 5 As shown in this embodiment of the invention, the deflection limiting surface is sequentially provided with a third limiting surface 213, an arc surface 214, and a fourth limiting surface 215 in the extension direction from the self-locking part 211 toward the splicing part 212. The third limiting surface 213 can be fitted with the first limiting surface 41 when in the protective position, and the fourth limiting surface 215 can be fitted with the second limiting surface 42 when in the storage position. The arc surface 214 extends along a second circumference with the central axis of the hinge hole as the center line. When the rear protection device deflects at a certain angle under different working conditions, the third limiting surface 213 and the first limiting surface 41, and the fourth limiting surface 215 and the second limiting surface 42 respectively fit together, which can effectively limit its excessive deflection, ensure the normal function of the protection device, and reduce the radial load on the lock cylinder 33, making it easier to remove the lock cylinder 33 from the positioning hole; while the arc surface 214 extends along a specific circumference, providing a smooth transition for the deflection of the anti-collision frame 2.

[0061] like Figure 5As shown in this embodiment of the invention, the splicing part 212 has a weight-reduction notch 216 on the side opposite to the deflection limiting surface. The design of the weight-reduction notch 216 is mainly to reduce material costs. By setting the weight-reduction notch 216, the amount of material used is reduced while meeting the functional requirements of the rear protection device, thereby directly reducing production costs. At the same time, due to the reduction in material usage, the processing technology and time required in the manufacturing process may also be reduced accordingly, further reducing indirect costs in the production process. In addition, the design of the weight-reduction notch 216 does not negatively affect the structural strength of the splicing part 212, and can still ensure a stable connection between the splicing part 212 and other components, ensuring that the rear protection device functions normally under various working conditions, thus achieving effective cost control without reducing product quality and performance.

[0062] like Figure 3 and Figure 7 As shown, in this embodiment of the invention, the second limiting surface 42 is located above the central axis of the hinge portion 121, and the second limiting surface 42 is inclined downwards in the front-to-back direction. See also Figure 7 c. When the fourth limiting surface 215 is in contact with the second limiting surface 42, the connecting plate 21 is in an inclined state, and the frame body is also in an inclined state. The weight of the frame body is shared by the hinge part 121, the lock core 33 and the limiting block 4, and the inclined second limiting surface 42 can increase the contact area with the fourth limiting surface 215.

[0063] like Figure 8 and Figure 9 As shown in this embodiment of the invention, the limiting lock 3 includes a lock cylinder 31, a spring 32, and a lock core 33. One end of the lock cylinder 31 is open and connected to the anti-collision bracket 2. The other end of the lock cylinder 31 has an inner end face 311. The lock core 33 passes through the lock cylinder 31 and has a stepped surface 331 facing the inner end face 311. The spring 32 elastically abuts against the inner end face 311 and the stepped surface 331 respectively. Under the action of the spring 32, the lock core 33 can maintain a relatively stable position, ensuring that its stable point is inserted into the corresponding positioning hole, without the need for a bolt structure, making it more convenient to use.

[0064] like Figure 8 and Figure 9As shown in this embodiment of the invention, one end of the lock cylinder 33 extends from the inner end face 311 of the lock cylinder 31 and forms a connecting portion. The limiting lock 3 also includes a handle seat 34, which is hinged to the connecting portion. The hinge point 341 between the handle seat 34 and the connecting portion is offset relative to the center point of the handle seat 34. This offset setting allows the handle seat 34 to precisely drive the lock cylinder 33 to extend and retract when it rotates. When the handle seat 34 rotates to one side, the offset structure of the hinge point 341 converts the rotational force into an axial thrust or pull force on the lock cylinder 33, causing the lock cylinder 33 to extend or retract from the lock cylinder 31. It is understood that in the prior art, limiting pins are generally used for limiting. Before adjusting the position of the anti-collision bracket 2, the limiting pin needs to be removed first, and then reassembled after adjustment. The process is complicated, and the limiting pin is independently set and is easy to lose. The limit lock 3 and the anti-collision frame 2 of this utility model are fixedly connected together by welding or bonding or other connection methods, which makes it convenient to switch the position of the anti-collision frame 2.

[0065] Specifically, the handle base 34 includes a fork-shaped connector and a handle. The fork-shaped connector forms a hinge point, and the two sides of the fork-shaped connector are horizontally arranged to fit against the lock cylinder 31, which serves as a limit and prevents the handle base 34 from rotating without manual operation. The handle is connected to the fork-shaped connector and is used for the operator to hold.

[0066] like Figure 3 As shown in the embodiment of this utility model, the mounting bracket 1 includes a first mounting plate 11 and a second mounting plate 12 welded together. The first mounting plate 11 has a plurality of bolt holes 111 for connecting the frame. The second mounting plate 12 has a hinge part 121 and a first positioning hole 122 and a second positioning hole 123. The limiting block 4 is disposed on the second mounting plate 12.

[0067] In existing technologies, the protective device and the chassis beam are usually welded together. Welding the chassis beam places high demands on welding processes, material matching, and the selection of welding direction and sequence, posing certain quality risks and resulting in low efficiency. This is unsuitable for automated assembly line operations. Therefore, this invention employs bolted connections, which not only reduces the stringent requirements of the process, making installation and operation simpler and easier, but also reduces quality risks caused by improper welding processes. Furthermore, bolted connections offer the advantages of easy disassembly and replacement. When the rear protective device is damaged or needs upgrading, it can be easily removed from the chassis beam for repair or replacement, reducing maintenance costs and improving the maintainability and service life of the equipment.

[0068] like Figure 3As shown in the embodiment of this utility model, the first mounting plate 11 is bent on both sides along the front-back direction to form a first bent portion 112 and a second bent portion 113, respectively. The second mounting plate 12 is bent on both sides along the up-down direction to form a third bent portion 124 and a fourth bent portion 125, respectively. The third bent portion 124 has a first slot 126 and a second slot 127 for the first bent portion 112 and the second bent portion 113 to be inserted one-to-one. The fourth bent portion 125 abuts against the lower end of the first mounting plate 11.

[0069] The bending section enhances the structural strength of individual mounting plates, improving their stability when connecting to the vehicle frame and supporting related components. It effectively resists various vibrations and impacts generated during vehicle operation, preventing deformation or damage due to stress. Furthermore, the cooperation between the bending section and the slot, along with the contact between the fourth bending section 125 and the lower end of the first mounting plate 11, prevents lateral impacts from being directly borne by the weld points or weld seams between the first and second mounting plates 11, further strengthening the overall structural strength of the mounting frame 1.

[0070] To achieve the above objectives, a second aspect of this utility model provides a vehicle, wherein the vehicle includes the aforementioned rear protective device.

[0071] Specifically, the mounting brackets 1 on both sides of the rear protective device are fastened to the rear of the vehicle using fasteners, and the crash beam 2 is hinged to the mounting brackets 1 on both sides via pins. Figure 1 When the lock cylinder 33 of the limit lock 3 is inserted into the second positioning hole 123, the anti-collision frame 2 is in the open state, providing protection. When the vehicle is climbing a slope or needs to approach other vehicles for some reason, and the rear protection device may collide with the road or other vehicles, the limit lock 3 is opened, and the anti-collision frame 2 is rotated upwards. After the anti-collision frame 2 hits the first limiting surface 41 of the limiting block 4 on the mounting bracket 1, it cannot continue to rotate. The lock cylinder 33 of the limit lock 3 is then inserted into the first positioning hole 122. Figure 2 At this time, the anti-collision frame 2 is in a folded state. Open the limit lock 3 and rotate the anti-collision frame 2 downward. After the anti-collision frame 2 touches the second limit surface 42 of the limit block 4 on the mounting bracket 1, it can no longer rotate. The lock cylinder 33 of the limit lock 3 is inserted into the second positioning hole 123 respectively, and the anti-collision frame 2 returns to the open state.

[0072] In the description of this utility model, it should be understood that the "front" and "rear" directions are defined based on the length direction of the vehicle, with the front of the vehicle being the front and the rear being the rear. The following descriptions involving the front and rear directions are all based on this definition.

[0073] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rear-end protection device, characterized in that, The rear protection device includes: Mounting bracket (1) is located at the rear of the vehicle and has a hinge (121), a first positioning hole (122) and a second positioning hole (123); The anti-collision frame (2) is rotatably mounted on the mounting frame (1) via the hinge (121) and can be deflected and switched between the storage position and the protective position; A limit lock (3) is provided on the anti-collision frame (2) and has a retractable lock cylinder (33). The lock cylinder (33) can be inserted into the first positioning hole (122) to keep the anti-collision frame (2) in the storage position, or the lock cylinder (33) can be inserted into the second positioning hole (123) to keep the anti-collision frame (2) in the protective position.

2. The rear-end protection device according to claim 1, characterized in that, The rear protection device also includes a limiting block (4). The limiting block (4) is disposed on the mounting bracket (1) and has a first limiting surface (41) and a second limiting surface (42). The first limiting surface (41) is used to abut against the anti-collision bracket (2) deflected to the storage position so that the lock cylinder (33) is aligned with the first positioning hole (122). The second limiting surface (42) is used to abut against the anti-collision bracket (2) deflected to the protection position so that the lock cylinder (33) is aligned with the second positioning hole (123).

3. The rear-end protection device according to claim 2, characterized in that, The first positioning hole (122) and the second positioning hole (123) are both located on the front side of the hinge (121), and the second positioning hole (123) is located on the upper side of the hinge (121) and the first positioning hole (122). The limiting block (4) is located on the rear side of the hinge (121) and has a first limiting surface (41) facing forward and a second limiting surface (42) facing downward. The anti-collision frame (2) includes a frame body and a connecting plate (21). The connecting plate (21) is disposed on the frame body and forms a deflection limiting surface. The deflection limiting surface can fit against the limiting block (4) and is deflected between the first limiting surface (41) and the second limiting surface (42).

4. The rear-end protection device according to claim 3, characterized in that, The connecting plate (21) includes a splicing part (212) and a locking part (211) connected in sequence. The splicing part (212) is provided on the frame body and has a hinge hole that penetrates the frame body. The locking part (211) extends out of the frame body and can be installed by the limiting lock (3). The splicing part (212) is used to form the deflection limiting surface on the side facing the limiting block (4).

5. The rear-end protection device according to claim 4, characterized in that, The deflection limiting surface is provided in sequence with a third limiting surface (213), an arc surface (214) and a fourth limiting surface (215) in the extension direction from the locking part (211) toward the splicing part (212). The third limiting surface (213) can be fitted with the first limiting surface (41) when it is in the protective position. The fourth limiting surface (215) can be fitted with the second limiting surface (42) when it is in the storage position. The arc surface (214) extends along a second circumference with the central axis of the hinge hole as the center line. And / or, the splicing part (212) is provided with a weight reduction notch (216) on the side opposite to the deflection limiting surface.

6. The rear-end protection device according to any one of claims 1 to 5, characterized in that, The limiting lock (3) includes a lock cylinder (31), a spring (32) and the lock core (33). One end of the lock cylinder (31) is open and connected to the anti-collision frame (2). The other end of the lock cylinder (31) forms an inner end face (311). The lock core (33) passes through the lock cylinder (31) and forms a stepped surface (331) facing the inner end face (311). The spring (32) elastically abuts against the inner end face (311) and the stepped surface (331) respectively.

7. The rear-end protection device according to claim 6, characterized in that, One end of the lock cylinder (33) extends out of the lock cylinder (31) from the inner end face (311) and forms a connecting part. The limiting lock (3) also includes a handle seat (34), which is hinged to the connecting part, and the hinge point (341) between the handle seat (34) and the connecting part is offset relative to the center point of the handle seat (34).

8. The rear-end protection device according to any one of claims 1 to 5, characterized in that, The mounting bracket (1) includes a first mounting plate (11) and a second mounting plate (12) welded together. The first mounting plate (11) has a plurality of bolt holes (111) for connecting the frame. The second mounting plate (12) has the hinge part (121) and the first positioning hole (122) and the second positioning hole (123).

9. The rear-end protection device according to claim 8, characterized in that, The first mounting plate (11) is bent on both sides along the front-back direction to form a first bent portion (112) and a second bent portion (113), and the second mounting plate (12) is bent on both sides along the up-down direction to form a third bent portion (124) and a fourth bent portion (125). The third bent portion (124) has a first slot (126) and a second slot (127) for the first bent portion (112) and the second bent portion (113) to be inserted one-to-one. The fourth bent portion (125) abuts against the lower end of the first mounting plate (11).

10. A vehicle, characterized in that, The vehicle includes a rear protection device according to any one of claims 1 to 9.

Images