Pull rod mechanism for adjusting container opening

Abstract

The invention provides a pull rod mechanism for adjusting an opening of a container, which comprises a tail door connecting screw rod, a central rotary structure and a tail door connecting long rod, and the tail door connecting screw rod and the central rotary structure are in threaded connection and can relatively rotate and relatively radially displace. According to the pull rod mechanism provided by the invention, through relative displacement between the tail door connecting screw rod and the central rotary structure, any size adjustment of-100 mm to + 100 mm can be carried out according to the offset of an opening of a tail door of an existing container, so that not only can a relatively small actual opening be enlarged, but also a relatively large opening can be shrunk, the structure is simplified as much as possible while the functionality is ensured, and the cost is reduced. And the size precision of the opening of the tail door of the container during loading is ensured.

Description

Technical Field

[0001] The invention relates to the field of automobile parts, and in particular to a pull rod mechanism for adjusting a cargo box opening. Background Art

[0002] In the production process of pickup trucks, the control of the opening size of the cargo box tailgate is a key process. Due to the uncertainty in the welding process, the opening size of the cargo box tailgate is difficult to effectively control before welding. After welding, the opening size of the cargo box tailgate will change to varying degrees each time. This dimensional inconsistency leads to difficulties in the assembly process, especially when a single-side gap is too large after assembly, which not only affects the sealing performance of the cargo box tailgate, but also seriously affects the overall appearance of the vehicle.

[0003] The existing welding process of pickup trucks has obvious deficiencies. After welding, the dimensional stability of the cargo box tailgate is difficult to ensure, resulting in inconsistent opening sizes after each assembly. The openings may be larger or smaller, and there is a lack of unified standards. This problem mainly stems from a variety of uncertainties in the welding process, which makes the dimensional adjustment process complicated and difficult to control. Sometimes, in order to correct these dimensional deviations, it is even necessary to redevelop and use large-scale tooling equipment, which not only increases production costs and time, but also makes the production process less flexible and the adjustment process very difficult. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a pull rod mechanism for adjusting the cargo box opening, which can be adjusted to any size of -100 to +100 mm according to the size of the existing cargo box tailgate opening offset, so that the actual opening that is too small can be enlarged, and the opening that is too large can be reduced. While ensuring functionality, the structure is simplified as much as possible to make it light and convenient, thereby ensuring the dimensional accuracy of the cargo box tailgate opening when loading.

[0005] In order to achieve the above technical effects, the present invention adopts the following technical solutions:

[0006] A pull rod mechanism for adjusting a cargo box opening comprises a tailgate connecting screw, a central rotating structure and a tailgate connecting long rod, wherein the tailgate connecting screw and the central rotating structure are connected by threads, and can perform relative rotation and relative radial displacement; the central rotating structure and the tailgate connecting long rod are rotatably connected; the tailgate connecting screw and the tailgate connecting long rod are respectively fixedly connected to the cargo box opening;

[0007] One end of the tailgate connecting screw is a threaded connection part with an external thread, and the other end is fixedly connected to the cargo box opening; the threaded connection part is connected to the central rotating structure through a thread, and relative rotation can occur between the two;

[0008] The central rotating structure specifically includes a rotating handle and a containing frame, wherein the containing frame is composed of four parallel guide rods, a first support block and a second support block, and the two ends of the parallel guide rods are respectively fixed on the two support blocks; wherein the first support block is provided with a threaded structure, which is threadedly connected to the threaded connection part of the tailgate connecting screw, and can realize radial linear displacement of the tailgate connecting screw in the containing frame by rotation; the rotating handle is fixedly arranged on the side of the second support block, and is used to rotate the central rotating structure; the second support block is also fixedly provided with a movable connection component, and the central rotating structure is rotatably connected to one end of the tailgate connecting long rod through the movable connection component; the other end of the tailgate connecting long rod is fixedly connected to the cargo box opening;

[0009] When the pull rod structure is working, the rotating handle is turned to make the central rotating structure rotate relative to the tailgate connecting screw and the tailgate connecting long rod, and relative radial displacement occurs between the central rotating structure and the tailgate connecting screw, so that the overall length of the pull rod structure increases or decreases.

[0010] Preferably, the connection end of the tailgate connecting screw and the cargo box opening further includes a first hinge structure and a first U-shaped connecting structure, the first hinge structure includes a first lifting ring and a first circular ring fixing pin, the first lifting ring includes a fixing circular ring hole and a connecting screw welded on the fixing circular ring hole; circular holes are respectively provided at both ends of the opening of the first U-shaped connecting structure;

[0011] During installation, first connect the connecting screw on the first lifting ring with the mounting hole on the cargo box tailgate through threads, then align the two circular holes in the opening of the first U-shaped connecting structure with the fixing circular ring holes, and insert the first circular ring fixing pin to achieve the connection between the cargo box tailgate and the tailgate connecting screw.

[0012] Preferably, an oil-free bushing is also provided on the central rotating structure.

[0013] Preferably, a fixed handle is also provided on the tailgate connecting long rod.

[0014] Preferably, the connecting end of the tailgate connecting the long rod and the cargo box opening further includes a second hinge structure and a second U-shaped connecting structure, the second hinge structure includes a second lifting ring and a second circular ring fixing pin, the first lifting ring includes a fixing circular ring hole and a connecting screw welded on the fixing circular ring hole; circular holes are respectively provided at both ends of the opening of the second U-shaped connecting structure;

[0015] During installation, first connect the connecting screw on the second lifting ring with the mounting hole on the cargo box tailgate through threads, then align the two circular holes in the opening of the second U-shaped connecting structure with the fixed circular ring holes, and insert the second circular ring fixing pin to achieve the connection between the cargo box tailgate and the tailgate connecting long rod.

[0016] Preferably, the offset range of the cargo box tailgate opening is -100 to +100 mm by relative radial displacement between the tailgate connecting screw and the central rotating structure, that is, the offset of the cargo box tailgate opening is increased by a maximum of 100 mm or decreased by a maximum of 100 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Simple structure and convenient manufacturing: The design of the pull rod mechanism provided by the present invention simplifies the requirements of complex machinery. The main body consists of three simple parts: the tailgate connecting screw, the central rotating structure and the tailgate connecting long rod. This simplified structure not only reduces the manufacturing cost, but also makes the assembly process more efficient and reduces assembly errors.

[0019] 2. The wearing parts in the pull rod mechanism provided by the present invention are standardized purchased parts, which means that users do not need to customize parts, reducing the cost of maintenance and replacement. In particular, for the adjustment of the vehicle cargo box tailgate, users can replace it with standard accessories widely available on the market, without waiting for the production or transportation of special parts. This not only saves time, but also significantly reduces the difficulty of maintenance.

[0020] 3. Designed with a labor-saving grip for easy use: In order to improve the convenience of operation, a labor-saving grip is designed in the pull rod mechanism provided by the present invention. This humanized design reduces the labor requirements of users when manually adjusting the opening of the cargo box tailgate, so that different users (such as vehicle maintenance workers and car owners) can easily use this tool without the need for additional mechanical force.

[0021] 4. Wide adjustment range of cargo box opening and high flexibility: The pull rod mechanism provided by the present invention can be adjusted within the range of -100mm to +100mm according to the size of the cargo box tailgate opening offset. This flexible adjustment method can deal with the problem of opening size deviation caused by different batches of production or long-term use. Whether the cargo box opening is too large or too small, it can be fine-tuned through the device. This greatly improves the flexibility during assembly and maintenance, so that users do not need to replace the cargo box or large equipment due to size issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 It is a structural schematic diagram of the pull rod mechanism for adjusting the cargo box opening described in the embodiment;

[0024] Figure 2 It is a schematic diagram of the pull rod mechanism for adjusting the cargo box opening in the embodiment being installed on the cargo box tailgate;

[0025] Figure 3 It is a schematic diagram of the local structure of the central rotation structure described in the embodiment.

[0026] The figure shows:

[0027] 1-Tailgate connecting screw

[0028] 11-First Ring

[0029] 12-First ring fixing pin

[0030] 13-First U-shaped connection structure

[0031] 14-Telescopic screw

[0032] 2-Center rotation structure

[0033] 21-First support block

[0034] 22-Parallel guide rods

[0035] 23-Second support block

[0036] 24-Active Connection Components

[0037] 25-Oil-free bushing

[0038] 26- Rotating handle

[0039] 3-Tailgate connecting rod

[0040] 31-Fixed handle

[0041] 32-Connect the long rod body

[0042] 33-Second U-shaped connection structure

[0043] 34-Second ring fixing pin

[0044] 35-Second Ring DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0047] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In addition, all directional indications in this application (such as up, down, left, right, front, back, bottom...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the descriptions involving "first", "second", etc. in the application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0048] like Figure 1 , 2 As shown, this embodiment provides a pull rod mechanism for adjusting the cargo box opening. The pull rod mechanism is installed at the opening of the tailgate of the pickup truck cargo box and can adjust the offset of the opening size of the tailgate of the cargo box within the range of -100 to +100 mm.

[0049] The entire pull rod structure consists of the following three parts: a tailgate connecting screw 1, a central rotating structure 2 and a tailgate connecting long rod 3; wherein, the tailgate connecting screw 1 and the central rotating structure 2 are connected by threads and can perform relative rotation and relative radial movement; the central rotating structure 2 and the tailgate connecting long rod 3 are rotationally connected, but cannot perform relative radial movement with each other.

[0050] The tailgate connecting screw 1 includes a first hinge structure and a telescopic screw 14, wherein the first hinge structure includes a first lifting ring 11 and a first circular ring fixing pin 12, wherein the first lifting ring 11 includes a fixing circular ring hole and a connecting screw welded on the fixing circular ring hole, and the connecting screw is threadedly connected to the bracket mounting hole on the cargo box tailgate. One end of the telescopic screw 14 is a threaded connection portion with an external thread of a certain length, and the other end is a first U-shaped connecting structure 13, and circular holes are respectively provided at both ends of the opening of the first U-shaped connecting structure 13. During installation, the two circular holes of the opening of the first U-shaped connecting structure 13 need to be aligned with the fixing circular ring hole, and the first circular ring fixing pin 12 is inserted to achieve the connection between the tailgate and the pull rod structure.

[0051] The threaded portion of the tailgate connecting screw 1 is connected to the central rotating structure 2 by a thread, and the two can rotate relative to each other. Figure 3As shown, the central rotating structure 2 specifically includes a rotating handle 26, a receiving frame and an oil-free bushing 25. The receiving frame is composed of four parallel guide rods 22, a first support block 21 and a second support block 23. The two ends of the parallel guide rods 22 are respectively fixed on the two support blocks to form a stable frame. Among them, a threaded structure is arranged in the middle of the first support block 21, which is connected to the threaded connection part of the telescopic screw 14 by thread, and can realize relative radial linear displacement adjustment by rotation. The parallel guide rods 22 provide guidance and support for the radial displacement of the telescopic screw 14, ensuring that the threaded connection part of the telescopic screw 14 can move accurately along the linear direction when rotating to prevent deviation. The whole structural design can not only ensure the stability of the movement, but also realize accurate length or position adjustment through thread transmission. In addition, a movable connection component 24 and an oil-free bushing 25 arranged outside the movable connection component 24 are fixedly arranged on the second support block 23. The central rotating structure 2 and the tailgate connecting long rod 3 are connected through the movable connection component 24, and can rotate relative to each other, but cannot perform radial relative movement. The oil-free bushing 25 makes the relative rotation between the central rotating structure 2 and the tailgate connecting rod 3 smoother and reduces wear. The rotating handle 26 is arranged on both sides of the second support block 23. By holding and rotating the handle, the central rotating structure 2 is driven to rotate relative to the tailgate connecting screw 1 and the tailgate connecting rod 3, which is more convenient and labor-saving.

[0052] The tailgate connecting rod 3 specifically includes a fixed handle 31, a connecting rod body 32 and a second hinge structure connected to the cargo box tailgate; wherein, a second U-shaped connecting structure 33 is provided at one end of the connecting rod body 32, which is fixedly connected to the second hinge structure through a second circular ring fixing pin 34, and the other end is connected to the movable connecting assembly 24 on the central rotating structure 2, the second U-shaped connecting structure 33 is the same as the first U-shaped connecting structure 13 on the telescopic screw 14, and the second hinge structure includes a second lifting ring 35, and the second lifting ring 35 has the same structure as the first lifting ring 11. The first lifting ring 11 and the second lifting ring 35 used at both ends are purchased parts to ensure strength and convenience, and are more convenient to replace.

[0053] When the pull rod structure is working, firstly, the lifting ring structure of the tailgate connecting screw 1 and the tailgate connecting long rod 3 are respectively installed on the upper and lower nut holes of the D column of the cargo box body, and at the same time, the circular holes on the U-shaped connecting structure of the tailgate connecting screw 1 and the tailgate connecting long rod 3 are respectively aligned with the fixed circular ring holes on the lifting rings, and the circular ring fixing pins are respectively inserted into the fixed circular ring holes; then, hold the fixed handle 31 with one hand, and turn the rotating handle 26 with the other hand, so that the central rotating structure 2 rotates relative to the tailgate connecting screw 1 and the tailgate connecting long rod 3, and the central rotating structure 2 and the tailgate connecting screw 1 also have relative radial movement, so that the overall length of the pull rod structure increases or decreases, thereby adjusting the offset of the cargo box tailgate opening within the range of -100 to +100 mm, which can increase the actual opening that is too small, and reduce the opening that is too large. While ensuring functionality, the structure is simplified as much as possible to make it light and convenient, and to ensure the dimensional accuracy of the opening of the cargo box tailgate when loading.

[0054] The above describes the specific embodiments of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention.

Claims

1. A pull rod mechanism for adjusting the cargo box opening, characterized in that: It comprises a tailgate connecting screw, a central rotating structure and a tailgate connecting long rod, wherein the tailgate connecting screw and the central rotating structure are connected by threads, and the two can perform relative rotation and relative radial displacement; the central rotating structure and the tailgate connecting long rod can be rotatably connected; the tailgate connecting screw and the tailgate connecting long rod are respectively fixedly connected to the cargo box opening; One end of the tailgate connecting screw is a threaded connection part with an external thread, and the other end is fixedly connected to the cargo box opening; the threaded connection part is connected to the central rotating structure through a thread, and relative rotation can occur between the two; The central rotating structure specifically includes a rotating handle and a containing frame, wherein the containing frame is composed of four parallel guide rods, a first support block and a second support block, and the two ends of the parallel guide rods are respectively fixed on the two support blocks; wherein the first support block is provided with a threaded structure, which is threadedly connected to the threaded connection part of the tailgate connecting screw, and can realize radial linear displacement of the tailgate connecting screw in the containing frame by rotation; the rotating handle is fixedly arranged on the side of the second support block, and is used to rotate the central rotating structure; the second support block is also fixedly provided with a movable connection component, and the central rotating structure is rotatably connected to one end of the tailgate connecting long rod through the movable connection component; the other end of the tailgate connecting long rod is fixedly connected to the cargo box opening; When the pull rod structure is working, the rotating handle is turned to make the central rotating structure rotate relative to the tailgate connecting screw and the tailgate connecting long rod, and relative radial displacement occurs between the central rotating structure and the tailgate connecting screw, so that the overall length of the pull rod structure increases or decreases.

2. The pull rod mechanism for adjusting the cargo box opening according to claim 1, characterized in that: The connection end of the tailgate connecting screw and the cargo box opening further includes a first hinge structure and a first U-shaped connecting structure, the first hinge structure includes a first lifting ring and a first circular ring fixing pin, the first lifting ring includes a fixing circular ring hole and a connecting screw welded on the fixing circular ring hole; both ends of the opening of the first U-shaped connecting structure are respectively provided with circular holes; During installation, first connect the connecting screw on the first lifting ring with the mounting hole on the cargo box tailgate through threads, then align the two circular holes in the opening of the first U-shaped connecting structure with the fixing circular ring holes, and insert the first circular ring fixing pin to achieve the connection between the cargo box tailgate and the tailgate connecting screw.

3. The pull rod mechanism for adjusting the cargo box opening according to claim 1, characterized in that: An oil-free bushing is also arranged on the central rotating structure.

4. The pull rod mechanism for adjusting the cargo box opening according to claim 1, characterized in that: A fixed handle is also arranged on the tailgate connecting long rod.

5. The pull rod mechanism for adjusting the cargo box opening according to claim 1, characterized in that: The connecting end of the tailgate connecting the long rod and the cargo box opening also includes a second hinge structure and a second U-shaped connecting structure, the second hinge structure includes a second lifting ring and a second circular ring fixing pin, the first lifting ring includes a fixing circular ring hole and a connecting screw welded on the fixing circular ring hole; both ends of the opening of the second U-shaped connecting structure are respectively provided with circular holes; During installation, first connect the connecting screw on the second lifting ring with the mounting hole on the cargo box tailgate through threads, then align the two circular holes in the opening of the second U-shaped connecting structure with the fixed circular ring holes, and insert the second circular ring fixing pin to achieve the connection between the cargo box tailgate and the tailgate connecting long rod.

6. The pull rod mechanism for adjusting the cargo box opening according to claim 1, characterized in that: By making relative radial displacement between the tailgate connecting screw and the central rotating structure, the offset range of the cargo box tailgate opening is -100 to +100 mm, that is, the offset of the cargo box tailgate opening is increased by a maximum of 100 mm or decreased by a maximum of 100 mm.

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