Folding rear bumper

Abstract

The utility model discloses a folding type rear bumper which comprises an upper supporting beam, two upper supporting arms, two lower swinging arms and a lower bumper, the two upper supporting arms are respectively and fixedly installed below the tail portion of a vehicle frame, and the upper supporting beam is fixedly installed between the two upper supporting arms. The lower end of each upper supporting arm is rotationally connected with the upper end of a lower swing arm through a rotating shaft, the lower ends of the two lower swing arms are welded and fixed to the upper portion of the lower bumper, and the lower swing arms can rotate around the rotating shafts so as to drive the lower bumper to be folded outwards and upwards. The rear bumper is simple in structure and outstanding in practical effect, the working state of the rear bumper can be rapidly changed, personnel or other objects can be effectively prevented from entering the rear bumper when the rear bumper is in the unfolded state, and even if a vehicle rear-end collision accident occurs, the rear bumper has enough blocking capacity; and when the rear bumper is in the folded state, the rear bumper is turned upwards, so that the rear bumper can be prevented from being damaged, the unloading operation space can be expanded, and interference with a follow-up bearing machine is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle rear bumpers, and particularly relates to a folding rear bumper. Background Art

[0002] At present, the rear protection of rear dump trucks on the market is mostly of a fixed structure. During the transportation process of a transport vehicle with such a rear protection structure, due to the factors of the road surface environment during transportation, it is very easy to be bumped and damaged. Especially in the case of a vehicle after linkage unloading and feeding, such as when cooperating with a paver during road construction, the fixed rear protection structure is likely to obstruct the front bucket of the rear machine, resulting in the inability to accurately dump the materials into the rear machine, causing material waste. At the same time, it may also cause damage such as bending deformation or even fracture of the rear protection due to cooperation errors, and may damage the relevant components installed under the vehicle frame. In this way, on the one hand, it is necessary to repair the rear protection, increasing the maintenance cost; on the other hand, if timely repair cannot be carried out, due to the lack of the protection of the rear protection, continuing to operate may also bring potential accident hazards of other objects rushing into the bottom of the vehicle. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the above-mentioned prior background art and provide a folding rear bumper.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a folding rear bumper, including an upper support beam, two upper support arms, two lower swing arms and a lower bumper. Among them, the two upper support arms are respectively fixedly installed under the tail of the vehicle frame at intervals, and the upper support beam is fixedly installed between the two upper support arms; the lower end of each upper support arm is rotatably connected to the upper end of the corresponding lower swing arm through a rotating shaft, and the lower ends of the two lower swing arms are welded and fixed to the upper part of the lower bumper. The lower swing arm can rotate around the rotating shaft to drive the lower bumper to fold outwards and upwards.

[0005] Further, the upper support arm includes an upper fixing plate and a double-layer clamping arm. The upper fixing plate is horizontally arranged and is provided with a plurality of mounting holes; the bottom of the upper fixing plate is fixedly installed with the double-layer clamping arm, which is integrally formed and has a longitudinal cross-section in the shape of π; a horizontally penetrating positioning jack is provided at the lower part of the double-layer clamping arm. Correspondingly, a coaxial positioning mechanism is fixedly arranged on the outer side of the double-layer clamping arm.

[0006] Further, the positioning mechanism is a telescopic bolt, including a bolt seat fixed to the outer side of the double-layer clamping arm. A bolt shaft is slidably installed inside the bolt seat. The outer end of the bolt seat is hinged with a handle. The inner side of the handle is hinged with the outer end of the bolt shaft, which can drive the bolt shaft to horizontally expand and contract relative to the bolt seat.

[0007] Further, the upper end of the lower swing arm is inserted and pivotally connected into the sandwich layer of the double-layer clamping arm, and is also provided with an upper connection hole and a lower connection hole, which are respectively arranged on the upper and lower sides of the above-mentioned rotating shaft and are both adapted to the positioning jack.

[0008] Further, when the insertion pin shaft is inserted into the positioning jack and the lower connection jack, the lower bumper is in a folded state;

[0009] When the insertion pin shaft is inserted into the positioning jack and the upper connection jack, the lower bumper is in an unfolded state.

[0010] Further, a limiting structure is also provided on the upper support arm, including a limiting block, which is arranged in the sandwich layer of the double-layer clamping arm, above the pivot joint of the lower swing arm, and is fixed by two limiting bolts.

[0011] Preferably, a grease nipple is provided on the pin socket.

[0012] Preferably, the double-layer clamping arm is inclined downward and backward relative to the upper fixing plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects: The structure of the utility model is simple and the practical effect is prominent. It can quickly change the working state of the rear bumper. It is in an unfolded state during transportation, which can effectively prevent people or other objects from drilling in. Even if a vehicle rear-end collision accident occurs, such a rear bumper also has sufficient blocking ability; during the unloading operation, it is in a folded state and the rear bumper flips upward, which can not only prevent the damage of the rear bumper, but also expand the working space and avoid interference with the subsequent receiving machine. At the same time, a limiting block is also provided on the upper side of the rear bumper. When the rear bumper flips up and folds, the limiting block can prevent the rear bumper from directly colliding with the vehicle frame, so as to avoid unnecessary damage to the rear bumper or the vehicle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 is a rear isometric view of the utility model;

[0016] Figure 3 is a schematic diagram of the structure of the upper support arm of the utility model;

[0017] Figure 4 is a left view of the upper support arm of the utility model;

[0018] Figure 5 is a schematic diagram of the structure of the lower swing arm of the utility model;

[0019] Figure 6 is an assembly diagram of the limiting structure on the upper support arm of the utility model;

[0020] Figure 7 This is the mating relationship diagram of the insertion pin shaft and the socket in the present utility model;

[0021] In the figure: 1. Upper support arm, 2. Lower swing arm, 3. Upper support beam, 4. Lower bumper, 5. Positioning mechanism, 6. Limit block, 7. Limit bolt, 8. Rotating shaft, 11. Upper fixing plate, 12. Double-layer clamping arm, 13. Rotating shaft hole, 14. Positioning insertion hole, 15. Limit hole, 21. Shaft hole, 22. Upper connection hole, 23. Lower connection hole, 24. Right-angle embedded opening, 51. Socket, 52. Insertion pin shaft, 53. Lever handle, 54. Grease nipple. Specific embodiments

[0022] It should be noted that in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship terms determined for the convenience of describing the structural relationships of the various components in the present utility model, and do not specifically refer to any component in the present utility model having a specific orientation, being constructed and operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0023] In addition, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] The following further details the specific embodiments of the present utility model in conjunction with the drawings:

[0025] As Figure 1 and Figure 2 shown, a folding rear bumper includes two upper support arms 1, an upper support beam 3, two lower swing arms 2, and a lower bumper 4, and is arranged in a left-right symmetric structure; Combining Figure 3 and Figure 4As shown, the upper support arm 1 includes an upper fixing plate 11 and a double-layer clamping arm 12. The upper fixing plate 11 is horizontally arranged, and a plurality of mounting holes are provided thereon. The double-layer clamping arm 12 is obliquely fixed to the bottom of the upper fixing plate 11 and is integrally formed therewith. The longitudinal section of the entire upper support arm 1 is in a π shape. The double-layer clamping arm 12 is arranged obliquely downward and backward, and the included angle between its central axis and the upper fixing plate 11 can be selected to be 50° - 60°. The above two upper support arms 1 are both fixed to the lower part of the tail end of the vehicle frame through fastening bolts passing through the mounting holes on the upper fixing plate 11 and are arranged at a relative interval; the upper support beam 3 is fixedly installed between the two upper support arms 1 and is a wide plate structure, parallel to the double-layer clamping arm 12 in the upper support arm 1, which can be used to hang the license plate here while increasing the installation stability between the upper support arms 1.

[0026] A horizontally penetrating rotating shaft hole 13 is provided at the lower end of the double-layer clamping arm 12 in the upper support arm 1. The upper end of the lower swing arm 2 is inserted into the sandwich of the corresponding double-layer clamping arm 12, and a shaft hole 21 corresponding to the rotating shaft hole 13 is provided thereon. The rotating shaft 8 horizontally passes through the rotating shaft hole 13 and the shaft hole 21 to rotatably connect the lower swing arm 2 and the upper support arm 1. Right-angled embedded ports 24 are provided at the lower ends of the two lower swing arms 2, and the lower bumper 4 is just clamped and welded thereto. The lower bumper 4 is made of a square tube, and one edge is adapted to the right-angled embedded port 24 and is tightly welded and fixed. A horizontally penetrating positioning jack 14 is also provided on the double-layer clamping arm 12, above the rotating shaft hole 13; a positioning mechanism 5 is fixedly installed outside the positioning jack 14, combined with Figure 6 and Figure 7 As shown, the positioning mechanism 5 is a telescopic pin, including a pin seat 51 coaxial with the positioning jack 14, a pin shaft 52 slidably installed in the pin seat 51, and a handle 53. The pin seat 51 is fixedly installed on the outer side wall of the double-layer clamping arm 12 and is hollow inside; the pin shaft 52 is coaxially installed inside the pin seat 51, and the pin shaft 52 can pass through the above positioning jack 14; the outer end of the pin seat 51 is hinged with the handle 53, and the middle part of the inner side of the handle 53 is simultaneously hinged with the outer end of the pin shaft 52. The pin shaft 52 is driven to slide horizontally in the pin seat 51 by the handle 53. Correspondingly, upper connection holes 22 and lower connection holes 23 are provided at the upper end of the lower swing arm 2. As Figure 5 shown, the upper connection hole 22 and the lower connection hole 23 are respectively located at the upper left and lower right of the above shaft hole 21. When the above pin shaft 52 is inserted into the upper connection hole 22, the lower swing arm 2 drives the lower bumper 4 to rotate around the rotating shaft 8 to a downward unfolded state; when the above pin shaft 52 is inserted into the lower connection hole 23, the lower swing arm 2 drives the lower bumper 4 to rotate around the rotating shaft 8 to an upward folded state.

[0027] Further, a limiting mechanism is also provided on the double-layer clamping arm 12 of the upper support arm 1, including a limiting block 6. Refer to Figure 6 As shown, the limiting block 6 is located in the interlayer of the double-layer clamping arm 12 and is relatively fixed to the double-layer clamping arm 12 through two limiting bolts 7, and is located above the positioning jack 14; the lower end surface of the limiting block 6 is flush with the upper end of the lower swing arm 2. When the lower swing arm 2 is in an unfolded state downward, the lower end of the limiting block 6 just plays a forward blocking role on the upper end of the lower swing arm 2, so that the lower swing arm 2 is lowered to be in a straight line with the double-layer clamping arm 12 of the upper support arm 1; at the same time, the front side of the limiting block 6 can also form a backward blocking on the lower swing arm 2 folded upward, so that after the lower swing arm 2 is folded, the insertion pin shaft 52 can be accurately inserted into the lower connection hole 23 to complete the fixed limit and prevent the lower bumper 4 from flipping up and directly colliding with the vehicle frame.

[0028] Further, a grease nipple 54 communicating with the inner cavity is provided on the side wall of the above-mentioned pin socket 51, and grease can be injected to reduce the sliding friction of the insertion pin shaft 52.

[0029] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present invention should also belong to the protection scope of the present invention.

Claims

1. Folding rear bumper, characterized by: It includes an upper support beam, two upper support arms, two lower swing arms and a lower bumper, wherein the two upper support arms are respectively fixedly installed below the rear end of the vehicle frame and are arranged at intervals, and the upper support beam is fixedly installed between the two upper support arms; the lower end of each of the upper support arms is rotatably connected to the upper end of the corresponding lower swing arm through a rotating shaft, the lower ends of the two lower swing arms are welded and fixed to the upper part of the lower bumper, and the lower swing arms can rotate around the rotating shaft to drive the lower bumper to fold outward and upward.

2. A foldable rear bumper according to claim 1, characterized in that: The upper support arm includes an upper fixed plate and a double-layer clamping arm, wherein the upper fixed plate is horizontally arranged and has a plurality of mounting holes thereon; the double-layer clamping arm is fixedly installed on the bottom of the upper fixed plate, and is integrally formed, and the overall longitudinal cross-section is π-shaped; a transversely penetrating positioning socket is provided at the lower part of the double-layer clamping arm, and correspondingly, a coaxial positioning mechanism is fixedly provided on the outer side of the double-layer clamping arm.

3. A foldable rear bumper according to claim 2, characterized in that: The positioning mechanism is a retractable latch, including a latch seat fixed to the outside of the double-layer clamping arm, a latch shaft slidably installed inside the latch seat, an outer end of the latch seat is hinged with a pull handle, and the inner side of the pull handle is hinged to the outer end of the latch shaft, which can drive the latch shaft to extend and retract laterally relative to the latch seat.

4. A foldable rear bumper according to claim 3, characterized in that: The upper end of the lower swing arm is inserted into the interlayer of the double-layer clamping arm and is also provided with an upper connecting hole and a lower connecting hole. The two holes are respectively arranged on the upper and lower sides of the above-mentioned rotating shaft and are both compatible with the positioning socket.

5. The foldable rear bumper according to claim 4, characterized in that: When the latch shaft is inserted into the positioning socket and the lower connecting socket, the lower bumper is in a folded state; When the latch shaft is inserted into the positioning socket and the upper connecting socket, the lower bumper is in an unfolded state.

6. The foldable rear bumper according to claim 2, characterized in that: The upper support arm is also provided with a limiting structure, including a limiting block, which is arranged in the interlayer of the double-layer clamping arm, located above the shaft connection of the lower swing arm, and fixed by two limiting bolts.

7. The foldable rear bumper according to claim 3, characterized in that: A grease nipple is provided on the latch seat.

8. The foldable rear bumper according to claim 2, characterized in that: The double-layer clamping arm is arranged to be inclined downward and rearward relative to the upper fixing plate.

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