Turn lock for flatbed truck

Abstract

The utility model belongs to the semi -trailer application equipment field especially relates to a flat -bed truck is with turn -lock. Including turn -lock head and the fixed bolt of setting at turn -lock head bottom, still including the top plate for welding on the flat -bed truck and the mounting plate of setting in the vertical board bottom is U type setting, mounting cavity is formed between mounting plate and top plate, still be provided with the through -hole of being used for fixed bolt to pass through on top plate, still be provided with stabilizing pipe on fixed bolt, stabilizing pipe is externally provided with limit tube, stabilizing pipe and limit tube all set up in mounting cavity, be provided with the limit post on the lateral wall of limit tube, the end of limit post can be set up on mounting plate, the locking pipe of being provided with on fixed bolt, the utility model provides a flat -bed truck is with turn -lock, through brand -new structure design, avoided the problem that traditional separate screw connection caused turn -lock loosening finally to cause the problem of lock -off of loosening.

Description

Technical Field

[0001] This utility model belongs to the field of semi-trailer application equipment, and in particular relates to a rotary lock for flatbed trucks. Background Technology

[0002] With the rapid development of my country's road network, north-south logistics and overseas trade have experienced continuous growth, and semi-trailers, as a means of transportation in logistics, have also developed rapidly. In existing technology, flatbed trucks without cargo boxes or guardrails primarily use turn locks to secure goods, such as containers.

[0003] In practice, the twist lock is welded onto a flat plate. After the container is placed, the twist lock is used to fix the container's locking lugs, thus securing the container. However, although the existing twist locks meet the need for fixation to a certain extent, there is a risk of unlocking, which poses certain safety hazards. Utility Model Content

[0004] This utility model addresses the technical problems existing in the rotary locks used on existing flatbed trucks by proposing a rotary lock that is reasonably designed, simple in structure, easy to manufacture, and less prone to unlocking.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a rotary lock for a flatbed truck, including a rotary lock head and a fixing bolt disposed at the bottom of the rotary lock head, as well as a top plate for welding onto the flatbed truck and a U-shaped mounting plate disposed at the bottom of the upright plate. An mounting cavity is formed between the mounting plate and the top plate. The top plate is also provided with a through hole for the fixing bolt to pass through. A stabilizing tube is also fitted onto the fixing bolt. A limiting tube is fitted onto the outside of the stabilizing tube. Both the stabilizing tube and the limiting tube are disposed within the mounting cavity. A limiting post is provided on the side wall of the limiting tube. The end of the limiting post can rest on the mounting plate. A locking tube is fitted onto the fixing bolt. The locking tube and the fixing bolt are threaded together. The diameter of the locking tube gradually increases from the rotary lock head toward the fixing bolt. The outer wall of the locking tube is in contact with the inner wall of the stabilizing tube. The mounting plate is provided with fixing holes for the fixing bolt and the locking tube to pass through.

[0006] Preferably, the stabilizing tube includes a stabilizing part disposed near the top plate and a connecting part disposed near the mounting plate. The outer diameter of the stabilizing part is larger than the outer diameter of the connecting part, and the stabilizing part is disposed in contact with the inner wall of the limiting tube.

[0007] Preferably, a retaining ring is fitted outside the locking tube, and the retaining ring is fitted inside the limiting tube.

[0008] Preferably, a rotating disk is provided at the end of the locking tube away from the stabilizing tube, and rotating protrusions are provided on the side wall of the rotating disk, with the rotating protrusions evenly distributed on the side wall of the rotating disk.

[0009] Preferably, the mounting plate has overlapping notches on both sides.

[0010] Preferably, the fixing bolt extends out of the locking tube, and a retaining spring is fitted onto one end of the fixing bolt extending out of the locking tube.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] This utility model provides a rotary lock for flatbed trucks. Through a brand-new structural design, it avoids the problem of loosening of the rotary lock caused by loose threads in traditional single threaded connections, which ultimately leads to unlocking. At the same time, this utility model has a simple structure and is easy to operate, making it suitable for large-scale promotion and use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the rotary lock for the flatbed truck provided in Example 1;

[0015] Figure 2 An exploded view of the rotary lock for a flatbed truck provided in Example 1;

[0016] Figure 3 A half-sectional view of the rotary lock for the flatbed truck provided in Example 1;

[0017] In the above figures, 1. Top plate; 11. Side plate; 12. Mounting plate; 121. Overlap notch; 13. Mounting cavity; 2. Rotary lock head; 21. Fixing bolt; 3. Stabilizing tube; 31. Stabilizing part; 32. Connecting part; 4. Limiting tube; 41. Limiting post; 5. Locking tube; 6. Rotating disc; 61. Rotating protrusion; 7. Fixing ring; 8. Snap ring. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, such as Figures 1-3 As shown, this embodiment aims to provide a rotary lock for flatbed trucks to reduce the loss of fixing effect caused by stripped bolt threads and avoid the risk of unlocking. To achieve the above objective, the rotary lock for flatbed trucks provided in this embodiment includes a rotary lock head 2 and a fixing bolt 21 disposed at the bottom of the rotary lock head 2. The rotary lock head 2 is used to rest on the lock lugs of the container or the ropes used for rope fixing, while the fixing bolt 21 is used to pass through the hole formed by the lock lugs or rope fixing.

[0021] Since the container needs to be secured to the flatbed of a flatbed truck, this device also needs to be secured to the flatbed truck. Therefore, it includes a top plate 1 for welding to the flatbed truck and a U-shaped mounting plate 12 located at the bottom of the upright plate. Specifically, holes are made at corresponding positions on the flatbed, and the top plate 1 is placed horizontally to fill the holes in the flatbed. Thus, the top plate 1 and the mounting plate 12 form an upper and lower structure. In this embodiment, to ensure the fixing (welding) effect of the mounting plate 12, a side plate 11 is welded to one side of the top plate 1. The side plate 11 is also welded and fixed to the mounting plate 12. This further ensures the fixing effect of the mounting plate 12. Simultaneously, the side plate 11 can also be welded to the flatbed.

[0022] Because the mounting plate 12 is U-shaped, a mounting cavity 13 is formed between the mounting plate 12 and the top plate 1. At the same time, a through hole for the fixing bolt 21 to pass through is provided on the top plate 1. The through hole is only large enough for the fixing bolt 21 to pass through. The rotary lock head 2 is located above the top plate 1.

[0023] In order to connect the fixing bolt 21, in this embodiment, a stabilizing tube 3 is also fitted on the fixing bolt 21. The diameter of the stabilizing tube 3 is larger than the diameter of the fixing bolt 21. A limiting tube 4 is fitted outside the stabilizing tube 3. In this embodiment, the axial length of the limiting tube 4 is larger than the axial length of the stabilizing tube 3. Both the stabilizing tube 3 and the limiting tube 4 are set in the mounting cavity 13, and there is a clearance fit between the limiting tube 4 and the stabilizing tube 3.

[0024] Meanwhile, a limiting post 41 is provided on the side wall of the limiting tube 4. The end of the limiting post 41 can be placed on the mounting plate 12. The purpose is to use the two sides of the mounting plate 12 to limit the rotation angle of the limiting tube 4.

[0025] Meanwhile, a locking tube 5 is fitted onto the fixing bolt 21. The locking tube 5 is threadedly engaged with the fixing bolt 21. The diameter of the locking tube 5 gradually increases from the rotating locking head 2 toward the fixing bolt 21. The mounting plate 12 is provided with fixing holes for the fixing bolt 21 and the locking tube 5 to pass through.

[0026] In this way, during installation, the locking tube 5 (the smaller diameter end) extends into the mounting cavity 13 from the fixing hole and engages with the fixing bolt 21 through the thread. As it is continuously tightened, the locking tube 5 extends further into the mounting cavity 13. The outer wall of the locking tube 5 is in contact with the inner wall of the stabilizing tube 3. This not only serves to fix the device, but also allows the fixing bolt 21 to rotate to a certain extent when external forces occur, without affecting the locking effect. At the same time, due to the clearance fit between the limiting tube 4 and the stabilizing tube 3, the rotation of the stabilizing tube 3 will drive the limiting tube 4 to rotate to a certain extent. The presence of the limiting post 41 limits its rotation angle, preventing excessive rotation.

[0027] In this embodiment, in order to reduce production costs and avoid the entire rotary lock structure from being too large, the stabilizing tube 3 includes a stabilizing part 31 disposed near the top plate 1 and a connecting part 32 disposed near the mounting plate 12. The outer diameter of the stabilizing part 31 is larger than the outer diameter of the connecting part 32. The stabilizing part 31 is disposed in close contact with the inner wall of the limiting tube 4, that is, only the stabilizing part 31 of the entire stabilizing tube 3 is in clearance fit with the limiting tube 4.

[0028] To further improve the locking effect, in this embodiment, a retaining ring 7 is also fitted outside the locking tube 5, and the retaining ring 7 is fitted inside the limiting tube 4. At the same time, there is also a clearance fit between the retaining ring 7 and the inner wall of the limiting tube 4. In this way, the locking tube 5 has two tight contacts, one is the stabilizing tube 3, and the other is the retaining ring 7.

[0029] To facilitate the rotation of the locking tube 5, a rotating disk 6 is provided at the end of the locking tube 5 furthest from the stabilizing tube 3. The rotating disk 6 is welded to the locking tube 5, and rotating protrusions 61 are provided on the side wall of the rotating disk 6, which are evenly distributed on the side wall of the rotating disk 6. Since the entire rotary lock is located below the flat plate, and the height of the flat plate is limited, the rotating disk 6 facilitates the rotation of the locking tube 5.

[0030] In order to increase the rotatable angle of the limiting tube 4, in this embodiment, overlapping notches 121 are provided on both sides of the mounting plate 12.

[0031] To further enhance stability, a retaining spring 8 is fitted onto one end of the fixing bolt 21 extending from the locking tube 5. This retaining spring 8 also restricts the rotation of the locking tube 5, ensuring a secure connection.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rotary lock for a flatbed truck, comprising a rotary lock head and a fixing bolt disposed at the bottom of the rotary lock head, characterized in that, It also includes a top plate for welding onto a flatbed truck and a U-shaped mounting plate set at the bottom of the upright plate. The mounting plate and the top plate form a mounting cavity. The top plate is also provided with a through hole for fixing bolts to pass through. A stabilizing tube is also fitted onto the fixing bolt. A limiting tube is fitted onto the outside of the stabilizing tube. Both the stabilizing tube and the limiting tube are set in the mounting cavity. A limiting post is provided on the side wall of the limiting tube. The end of the limiting post can rest on the mounting plate. A locking tube is fitted onto the fixing bolt. The locking tube and the fixing bolt are threaded together. The diameter of the locking tube gradually increases from the rotating locking head towards the fixing bolt. The outer wall of the locking tube is in contact with the inner wall of the stabilizing tube. The mounting plate is provided with fixing holes for fixing bolts and locking tubes to pass through.

2. The rotary lock for flatbed trucks according to claim 1, characterized in that, The stabilizing tube includes a stabilizing part located near the top plate and a connecting part located near the mounting plate. The outer diameter of the stabilizing part is larger than the outer diameter of the connecting part, and the stabilizing part is fitted to the inner wall of the limiting tube.

3. The rotary lock for flatbed trucks according to claim 2, characterized in that, A retaining ring is also fitted outside the locking tube, and the retaining ring is fitted inside the limiting tube.

4. The rotary lock for flatbed trucks according to claim 3, characterized in that, A rotating disk is provided at the end of the locking tube away from the stabilizing tube, and rotating protrusions are provided on the side wall of the rotating disk, which are evenly distributed on the side wall of the rotating disk.

5. The rotary lock for flatbed trucks according to claim 4, characterized in that, The mounting plate has overlapping notches on both sides.

6. The rotary lock for flatbed trucks according to claim 5, characterized in that, The fixing bolt extends out of the locking tube, and a retaining spring is fitted at one end of the fixing bolt extending out of the locking tube.

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