Semitrailer rear protection device convenient to assemble

Abstract

The semitrailer rear protection device convenient to assemble comprises a main frame body, a connecting base is fixedly installed on one side of the main frame body, rotating sleeves are rotationally connected to the two sides of one end of the connecting base, threads are arranged on the inner sides of the two rotating sleeves, the rotating sleeves are in threaded connection with threaded rods, and the threaded rods are in threaded connection with the connecting base. Connecting blocks are fixedly mounted at one ends of the two groups of screw rods; a fixing frame welded to the bottom of the semitrailer is installed on the top side of the main frame body, two sets of connecting plates are fixedly installed on the bottom side of the fixing frame, and connecting holes capable of being matched with the connecting blocks are formed in the two sets of connecting plates. According to the rear protection device, the screw can be driven to move flexibly through the cooperation of the connecting base and the rotating sleeve, and the screw and the connecting block can be rapidly disassembled from the connecting plate through the cooperation of the screw, the connecting block and the connecting plate, so that the rear protection device can be temporarily disassembled when the semitrailer encounters a rugged road, and the labor intensity of workers is reduced. Therefore, the rear protection device is prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of rear protection devices for semi-trailers, and more specifically, particularly relates to a rear protection device for semi-trailers which is easy to assemble. Background Art

[0002] Traditional semi-trailers have a high body. In order to prevent the rear vehicles, especially cars or sports cars, from driving directly into the bottom of the frame due to excessive speed and causing serious traffic accidents, a rear guard is generally installed at the rear of the semi-trailer frame to prevent the rear vehicles from directly inserting into the bottom of the frame when rear-ending, thereby reducing the damage caused by traffic accidents. The rear guard of the existing semi-trailer is close to the ground because the bottom is close to the ground. When passing through some rugged sections, the rear guard is easy to scratch the ground, thereby causing damage to the rear guard. At the same time, since the existing rear guard is mostly fixed and welded at the bottom of the rear end of the semi-trailer, it is not convenient to temporarily disassemble it. After disassembling the rear guard, it is not convenient to quickly install the rear guard again. Therefore, in view of this, the existing structure and defects are studied and improved, and a semi-trailer rear guard that is easy to assemble is provided, in order to achieve the purpose of being more practical. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a semi-trailer rear protection device that is easy to assemble, which is achieved by the following specific technical means:

[0004] A semi-trailer rear protection device that is easy to assemble, includes a main frame, a connecting seat is fixedly installed on one side of the main frame, and rotating sleeves are rotatably connected on both sides of one end of the connecting seat, the inner sides of two groups of rotating sleeves are provided with threads and are threadedly connected with screws, and one end of the two groups of screws are fixedly installed with connecting blocks; a fixing frame welded to the bottom of the semi-trailer is installed on the top side of the main frame, and two groups of connecting plates are fixedly installed on the bottom side of the fixing frame, and the two groups of connecting plates are provided with connecting holes that can cooperate with the connecting blocks.

[0005] Furthermore, the two groups of connecting plates are provided with guide grooves on the bottom sides of the connecting holes; one end of the connecting block passes through the connecting hole, and a screw hole is provided on the top side of the end passing through the connecting hole, and a threaded pin is threadedly connected to the inner side of the screw hole, and one side of the threaded pin is abutted against one side of the connecting plate.

[0006] Furthermore, two groups of support rods are symmetrically and fixedly installed horizontally on one side of the fixing frame, and support plates are vertically and fixedly installed on one end of the two groups of support rods.

[0007] Furthermore, one side of the two groups of support plates are both arranged to abut against one side of the middle portion of the main frame.

[0008] Furthermore, two groups of connection frames are fixedly installed on the bottom side of the main frame, the inner sides of the two groups of connection frames are provided with connection grooves, connection columns are installed in the two groups of connection grooves, and the bottom sides of the two groups of connection columns are jointly fixedly installed with a base frame.

[0009] Furthermore, the length, width and thickness of the connecting groove are respectively equal to the length, width and thickness of the connecting column.

[0010] Furthermore, a plurality of groups of screw holes are provided on one side of the connecting groove, and a plurality of groups of through holes are respectively provided on the connecting column corresponding to the plurality of groups of screw holes, wherein a group of screw holes and the inner sides of the through holes located at the same horizontal height are jointly installed with bolts, and the bolts are threadedly connected to the screw holes, and a hexagonal hole is provided on one end of the bolt.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model can realize flexible movement of the screw rod through the cooperation of the connecting seat and the rotating sleeve, and can realize rapid disassembly and assembly of the screw rod and the connecting block from the connecting plate through the cooperation of the screw rod, the connecting block and the connecting plate, so that when the semi-trailer encounters a rough road section, the rear protective device can be temporarily disassembled to avoid damage to the rear protective device.

[0013] The utility model can flexibly adjust the distance between the underframe and the main frame body through the cooperation of the connecting frame, the bolts and the connecting columns, so as to flexibly adjust the height of the underframe according to different bottom heights of semi-trailers, thereby increasing the applicability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the connecting plate and the supporting plate of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the connecting plate of the utility model.

[0018] Figure 5 It is a schematic diagram of the structure of the rotating sleeve and the screw rod of the utility model.

[0019] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0020] 1. Main frame; 2. Connecting seat; 3. Rotating sleeve; 4. Screw; 5. Fixed frame; 6. Connecting plate; 7. Connecting block; 8. Support rod; 9. Support plate; 10. Connecting frame; 11. Connecting column; 12. Bolt; 13. Base frame; 14. Guide groove. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example

[0025] As attached Figure 1 To Attachment Figure 5 As shown:

[0026] The utility model provides a semi-trailer rear protection device which is easy to assemble, comprising a main frame body 1, a connecting seat 2 is fixedly installed on one side of the main frame body 1, a rotating sleeve 3 is rotatably connected to both sides of one end of the connecting seat 2, the inner sides of two groups of the rotating sleeves 3 are provided with threads, and screw rods 4 are threadedly connected, and one end of the two groups of the screw rods 4 are fixedly installed with connecting blocks 7; a fixing frame 5 welded to the bottom of the semi-trailer is installed on the top side of the main frame body 1, and two groups of connecting plates 6 are fixedly installed on the bottom side of the fixing frame 5, and the two groups of connecting plates 6 are provided with connecting holes that can cooperate with the connecting blocks 7.

[0027] Among them, the two groups of connecting plates 6 are both provided with a guide groove 14 on the bottom side of the connecting hole; one end of the connecting block 7 passes through the connecting hole, and a screw hole is provided on the top side of the end passing through the connecting hole, and a threaded pin is threadedly connected to the inner side of the screw hole, and one side of the threaded pin is abutted against one side of the connecting plate 6. After the main frame 1 is installed, the connecting block 7 is tightened for the second time using the threaded pin to prevent the rotating sleeve 3 from rotating due to vibration during the driving of the vehicle, so as to prevent the connecting block 7 from being disengaged from the connecting hole, so as to ensure the safety of use.

[0028] Among them, two groups of support rods 8 are symmetrically and fixedly installed horizontally on one side of the fixing frame 5, and support plates 9 are vertically and fixedly installed on one end of the two groups of support rods 8.

[0029] One side of the two groups of support plates 9 is disposed against one side of the middle portion of the main frame 1 , thereby increasing the anti-collision capability of the main frame 1 .

[0030] Among them, two groups of connecting frames 10 are fixedly installed on the bottom side of the main frame 1, and the inner sides of the two groups of connecting frames 10 are provided with connecting grooves, and connecting columns 11 are installed in the two groups of connecting grooves. The bottom sides of the two groups of connecting columns 11 are jointly fixedly installed with a base frame 13 to increase the protection range of the main frame 1.

[0031] The length, width and thickness of the connection groove are respectively equal to the length, width and thickness of the connection column 11, so as to avoid shaking of the connection column 11 in the connection groove after installation.

[0032] Among them, a plurality of groups of screw holes are provided on one side of the connecting groove, and a plurality of groups of through holes are respectively provided on the connecting column 11 corresponding to the plurality of groups of screw holes, wherein a group of screw holes and the inner side of the through holes located at the same horizontal height are jointly installed with bolts 12, and the bolts 12 are threadedly connected with the screw holes, and a hexagonal hole is provided on one end of the bolt 12, so as to realize flexible adjustment of the distance between the base frame 13 and the main frame body 1.

[0033] The working principle of this embodiment is as follows: when the main frame 1 needs to be installed, first, both sets of connecting blocks 7 are aligned with the guide grooves 14 and the main frame 1 is moved upward so that the connecting blocks 7 correspond to the connecting holes. Then, the rotating sleeve 3 is rotated to drive the screw 4 to move. The screw 4 drives the connecting block 7 to enter the connecting hole and emerge from the other end. Then, the threaded pin is screwed into the threaded hole and abuts against the outer side of the connecting plate 6 to ensure the stability of the connection. In this way, the installation is completed. When the main frame 1 needs to be disassembled, the threaded pin is rotated and taken out. The rotating sleeve 3 is rotated to drive the screw 4 and the connecting block 7 to leave the connecting hole. At this time, the main frame 1 can be removed.

[0034] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A semi-trailer rear protection device that is easy to assemble, comprising a main frame (1), a connecting seat (2) being fixedly mounted on one side of the main frame (1), characterized in that: Both sides of one end of the connecting seat (2) are rotatably connected to a rotating sleeve (3), the inner sides of the two sets of rotating sleeves (3) are provided with threads and are threadedly connected to screw rods (4), and one end of the two sets of screw rods (4) is fixedly installed with a connecting block (7); the top side of the main frame (1) is installed with a fixing frame (5) welded to the bottom of the semi-trailer, and the bottom side of the fixing frame (5) is fixedly installed with two sets of connecting plates (6), and the two sets of connecting plates (6) are provided with connecting holes that can cooperate with the connecting block (7).

2. The semi-trailer rear protection device that is easy to assemble as claimed in claim 1 is characterized in that: The two groups of connecting plates (6) are both provided with guide grooves (14) on the bottom sides of the connecting holes; one end of the connecting block (7) passes through the connecting hole, and a screw hole is provided on the top side of the end passing through the connecting hole, a threaded pin is threadedly connected to the inner side of the screw hole, and one side of the threaded pin abuts against one side of the connecting plate (6).

3. The semi-trailer rear protection device that is easy to assemble as claimed in claim 1 is characterized in that: Two groups of support rods (8) are symmetrically and fixedly mounted horizontally on one side of the fixing frame (5), and support plates (9) are vertically and fixedly mounted on one end of the two groups of support rods (8).

4. The semi-trailer rear protection device that is easy to assemble as claimed in claim 3 is characterized in that: One side of the two groups of support plates (9) is disposed against one side of the middle portion of the main frame (1).

5. The semi-trailer rear protection device that is easy to assemble as claimed in claim 1 is characterized in that: Two groups of connection frames (10) are fixedly mounted on the bottom side of the main frame (1), the inner sides of the two groups of connection frames (10) are provided with connection grooves, connection columns (11) are installed in the two groups of connection grooves, and a bottom frame (13) is fixedly mounted on the bottom sides of the two groups of connection columns (11).

6. The semi-trailer rear protection device that is easy to assemble as claimed in claim 5, characterized in that: The length, width and thickness of the connecting groove are respectively equal to the length, width and thickness of the connecting column (11).

7. The semi-trailer rear protection device that is easy to assemble as claimed in claim 5, characterized in that: A plurality of groups of screw holes are provided on one side of the connection groove, and a plurality of groups of through holes are provided on the connection column (11) corresponding to the plurality of groups of screw holes, wherein a group of screw holes and the inner sides of the through holes at the same level are jointly installed with bolts (12), the bolts (12) being threadedly connected to the screw holes, and a hexagonal hole is provided on one end of the bolt (12).

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