Stacked coil spring module convenient to install and trailer line suspension structure

Abstract

The utility model belongs to the field of coil spring combined energy storage, and particularly relates to a stacked coil spring module convenient to install and a trailer line suspension structure. The stacked coil spring module convenient to install comprises a working module and at least one coil spring module connected with the working module; the working module comprises a first shell, a first rotating shaft is rotationally connected into the first shell, the two ends of the first rotating shaft extend out of the two sides of the first shell, and the first rotating shaft is fixedly connected with one end of a pull rope. The coil spring module comprises a second shell, a second rotating shaft is rotationally connected in the second shell, the two ends of the second rotating shaft extend out of the two sides of the second shell, the second rotating shaft is fixedly connected with the inner end of a coil spring, and the outer end of the coil spring is fixedly connected with the second shell; a first fixed connection structure is arranged between the side of the first shell and the side of the second shell, and a second fixed connection structure is arranged between the first rotating shaft and the second rotating shaft, so that an integral rotating shaft formed by fixing the first rotating shaft and the second rotating shaft can generate relative rotation in an integral shell formed by the first shell and the second shell.

Description

Technical Field

[0001] The utility model belongs to the field of coil spring combined energy storage, and in particular relates to a superimposed coil spring module and a trailer line suspension structure which are easy to install. Background Art

[0002] Combining multiple coil spring modules and superimposing spring forces is a mature prior art, but the prior art has the following disadvantages: 1. The overall volume is not easy to control; 2. It is not easy to combine and install. One or both of the above are described below with examples.

[0003] CN201610037372.0 proposes a coil spring series system, including a box body and a plurality of coil spring modules that can be stacked and installed in the box body. In actual use, if the number of coil spring modules is less than the maximum capacity, it will lead to a waste of lateral space. If the number of coil spring modules is more than the maximum capacity, it will require replacing the box body with a larger capacity, and the overall volume is not easy to control.

[0004] CN201610459219.7 proposes a combined coil spring, similar to the above-mentioned document, including a rotating shaft and a plurality of coil spring modules superimposed and installed on the rotating shaft. Similarly, in actual use, when the number of coil spring modules is small, excessive rotation will lead to waste of lateral space. If the total length of the coil spring module is greater than the length of the rotating shaft, it will require replacement of a longer rotating shaft, and the overall length is not easy to control.

[0005] CN02241743.5 proposes a resistor device, in which a coil spring and an outer protective cover of the coil spring need to be installed in sequence, and the outer protective cover needs to be fixed with screws in a circumferential array, which makes assembly troublesome.

[0006] CN201720410017.3 proposes a combined spring energy accumulator, in which the internal coil spring, the external pull rope structure, the outer shell and the bracket are an integral product. When combined, the brackets are fixed to form a whole. On the one hand, the cost is high, and on the other hand, the assembly is troublesome. Utility Model Content

[0007] In order to solve the problem that the overall volume of the existing coil spring module is not easy to control and / or is not easy to assemble and install, the utility model provides an easy-to-install superimposed coil spring module and a trailer line suspension structure.

[0008] The purpose of the utility model is achieved in the following way: a superimposed coil spring module that is easy to install, comprising a working module 1 and at least one coil spring module 2 connected to the working module 1; wherein,

[0009] The working module 1 comprises a first housing 11, wherein a first rotating shaft 12 is rotatably connected inside the first housing 11, two ends of the first rotating shaft 12 extend from two sides of the first housing 11, and the first rotating shaft 12 is fixedly connected to one end of a pull rope 13;

[0010] The coil spring module 2 comprises a second housing 21, the second housing 21 is rotatably connected to a second shaft 22, two ends of the second shaft 22 extend from two sides of the second housing 21, the second shaft 22 is fixedly connected to an inner end of a coil spring 23, and an outer end of the coil spring 23 is fixedly connected to the second housing 21;

[0011] A first fixed connection structure is arranged between the side of the first shell 11 and the side of the second shell 21, and a second fixed connection structure is arranged between the first rotating shaft 12 and the second rotating shaft 22, so that the integral rotating shaft formed by the first rotating shaft 12 and the second rotating shaft 22 can generate relative rotation within the integral shell formed by the first shell 11 and the second shell 21.

[0012] Furthermore, the first fixed connection structure refers to the threaded fit between the first housing 11 and the second housing 21 , and the second fixed connection structure refers to the threaded fit between the first rotating shaft 12 and the second rotating shaft 22 .

[0013] Furthermore, a first external thread 111 is disposed on the side of the first housing 11, and a first internal thread 211 matching with the first external thread 111 is disposed on the side of the second housing 21;

[0014] The end of the first rotating shaft 12 is provided with a second external thread 121 , and the end of the second rotating shaft 22 is provided with a second internal thread 221 matching with the second external thread 121 .

[0015] As a solution, the first external thread 111 and the second external thread 121 have opposite thread directions.

[0016] As a solution, the first external thread 111 and the second external thread 121 have the same thread direction, the same number of thread turns, and the same thread pitch.

[0017] Furthermore, the end of the second rotating shaft 22 is fixedly connected to a nut 24 , and a second internal thread 221 is formed on a side of the nut 24 away from the second rotating shaft 22 .

[0018] Furthermore, a first external thread 111 is disposed on the other side of the second housing 21 away from the first internal thread 211 ; and a second external thread 121 is disposed on the other end of the second shaft 22 away from the second internal thread 221 .

[0019] Furthermore, one side of the second shell 21 is open, one side of the coil spring 23 abuts against the inner wall of the other side of the second shell 21 , and the other side of the coil spring 23 abuts against one side of the limit plate 3 . The limit plate 3 is sleeved outside the second rotating shaft 22 , and the other side of the limit plate 3 abuts against the nut 24 .

[0020] A trailer line suspension structure of a superimposed coil spring module includes a trailer head, the rear of the trailer head is connected to the trailer body, at least one line is suspended between the trailer head and the trailer body, a first shell 11 or a second shell 21 is fixedly connected to the trailer head or the trailer body, and a pull rope 13 extends from the first shell 11 and is tied and fixed to the line body of the line.

[0021] Compared with the prior art, the working module with a pull rope in the utility model is separately arranged from the coil spring module. According to the required spring force, a corresponding number of coil spring modules are superimposed on the working module, and the overall length only depends on the number of coil spring modules. The shells of the working module and the coil spring module are fixed to each other, and the rotating shafts of the two are fixed to each other, so that normal operation can be achieved and installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the coil spring module;

[0023] Figure 2 This is an exploded view of the coil spring module;

[0024] Figure 3 It is a cross-sectional view of the coil spring module.

[0025] Among them, the working module 1, the first shell 11, the first external thread 111, the first rotating shaft 12, the second external thread 121, the pull rope 13, the coil spring module 2, the second shell 21, the first internal thread 211, the second rotating shaft 22, the second internal thread 221, the coil spring 23, the nut 24, and the limit plate 3. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0028] As attached Figure 1-3 As shown, a stacked spring module that is easy to install includes a working module 1 and at least one spring module 2 connected to the working module 1; wherein,

[0029] The working module 1 comprises a first housing 11, wherein a first rotating shaft 12 is rotatably connected inside the first housing 11, two ends of the first rotating shaft 12 extend from two sides of the first housing 11, and the first rotating shaft 12 is fixedly connected to one end of a pull rope 13;

[0030] The coil spring module 2 comprises a second housing 21, the second housing 21 is rotatably connected to a second shaft 22, two ends of the second shaft 22 extend from two sides of the second housing 21, the second shaft 22 is fixedly connected to an inner end of a coil spring 23, and an outer end of the coil spring 23 is fixedly connected to the second housing 21;

[0031] A first fixed connection structure is arranged between the side of the first shell 11 and the side of the second shell 21, and a second fixed connection structure is arranged between the first rotating shaft 12 and the second rotating shaft 22, so that the integral rotating shaft formed by the first rotating shaft 12 and the second rotating shaft 22 can generate relative rotation within the integral shell formed by the first shell 11 and the second shell 21.

[0032] Preferably, coil spring modules 2 are arranged axially outward on both sides of the working module 1, and the number of coil spring modules 2 on both sides is equal or one different, so that the overall center of gravity is close to the middle position.

[0033] Furthermore, the first fixed connection structure and the second fixed connection structure can both be synchronous fixing structures. The synchronous fixing structure means that the two fixing structures can be completed synchronously. In detail, the synchronous fixing structure can be a polygonal block / outer edge directly plugged into the corresponding polygonal groove, and further, the shells of the two are further fixed by other means, such as welding or tightening with a tension sleeve. Preferably, it is the threaded fit described later.

[0034] Furthermore, the first fixed connection structure refers to the threaded fit between the first shell 11 and the second shell 21, and the second fixed connection structure refers to the threaded fit between the first rotating shaft 12 and the second rotating shaft 22; in principle, the first fixed connection structure and the second fixed connection structure do not need to be in the same direction, but preferably, combined with the above-mentioned "synchronous fixing structure", the following scheme is formed.

[0035] A first external thread 111 is disposed on the side of the first housing 11, and a first internal thread 211 matching the first external thread 111 is disposed on the side of the second housing 21;

[0036] The end of the first rotating shaft 12 is provided with a second external thread 121, and the end of the second rotating shaft 22 is provided with a second internal thread 221 matching with the second external thread 121;

[0037] Preferably, the second external threads 121 are respectively disposed at both ends of the first rotating shaft 12 , and the second external threads 121 at the two ends have opposite rotation directions.

[0038] Based on the above thread structure, two solutions are proposed here:

[0039] 1. The first external thread 111 and the second external thread 121 have opposite thread directions. This structure requires that the second rotating shaft 22 can move axially with respect to the second housing 21 .

[0040] When installing, the user pinches the exposed first shaft 12 and the second shaft 22. When the number of threads of the second external thread 121 is greater than the number of threads of the first external thread 111, the threads of the two are matched and installed by rotation. At this time, since the threads of the shells are in opposite directions, installation is not performed, but the coil spring 23 accumulates energy. After the first shaft 12 and the second shaft 22 are installed in place, the first shell 11 and the second shell 21 are manually calibrated to align. Under the external force combined with the force accumulated by the coil spring 23, the threads of the first shell 11 and the second shell 21 are rotated and matched. Since the number of threads of the second external thread 121 is greater than the number of threads of the first external thread 111, the energy accumulated by the coil spring 23 is not completely released, and further force is provided to screw the shells in.

[0041] When the number of thread turns of the second external thread 121 is less than or equal to the number of thread turns of the first external thread 111, the above-mentioned "further providing force to screw the shells together" cannot be achieved during normal installation, so the second rotating shaft 22 is pre-rotated relative to the second shell 21, and the number of pre-rotation turns is greater than the difference in the number of turns between the first external thread 111 and the second external thread 121, so that a pre-tightening force is further provided to the coil spring 23. At this time, the coil spring 23 with more force accumulated can further provide a force to screw the shells together after the first shell 11 and the second shell 21 are installed through the above-mentioned installation method.

[0042] As another installation method of the scheme, during installation, the user pinches the exposed first rotating shaft 12 and the second rotating shaft 22 to rotate and dock the two into place, and rotates the second shell 21 along the docking direction of the first rotating shaft 12 and the second rotating shaft 22 to allow the coil spring 23 to accumulate energy. The energy accumulated by the coil spring 23 must be able to make the second internal thread 221 and the second external thread 121 in the energy release direction of the accumulated energy of the coil spring 23 completely combined with each other, and there is still some energy remaining. The installation is completed, and the installation method of other coil spring modules 2 is the same.

[0043] 2. The first external thread 111 and the second external thread 121 have the same thread direction, the same number of threads, the same thread pitch, and preferably the same total thread length. Similarly, the first internal thread 211 and the second internal thread 221 are naturally the same.

[0044] During installation, the user pinches the exposed first rotating shaft 12 and the second rotating shaft 22 with his hands, and supports the first shell 11 and the second shell 21, so that there is no excessive relative rotation between the first rotating shaft 12 and the first shell 11, and between the second rotating shaft 22 and the second shell 21. At this time, the first external thread 111 cooperates with the first internal thread 211, and the second external thread 121 cooperates with the second internal thread 221. The two are operated, rotated and installed at the same time, and the installation process is simple and convenient.

[0045] Furthermore, the end of the second shaft 22 is fixedly connected to a nut 24, preferably by welding. The nut 24 is not completely screwed into the second shaft 22, and a second internal thread 221 is formed inside the side away from the second shaft 22, i.e., the part that is not completely screwed in.

[0046] The second housing 21 is provided with a first external thread 111 on the other side away from the first internal thread 211 ; the second shaft 22 is provided with a second external thread 121 on the other end away from the second internal thread 221 , so that the coil spring module 2 can be further assembled outwardly by stacking.

[0047] It is undeniable that for the second scheme, the first rotating shaft 12 and the second rotating shaft 22 are installed by rotation, and during the operation, the rotating shaft as a whole also rotates repeatedly in two directions. Therefore, it is undeniable that when slipping occurs, there is a possibility of separation between the first rotating shaft 12 and the second rotating shaft 22. Then it is necessary to further increase anti-separation measures, such as increasing the friction between the second external thread 121 and the second internal thread 221, such as wrapping a waterproof tape or other friction-increasing material around the thread during installation. Of course, it is preferred to start with the structure itself: one side of the second shell 21 is open, one side of the coil spring 23 abuts against the inner wall of the other side of the second shell 21, and the other side of the coil spring 23 abuts against one side of the limit plate 3. The limit plate 3 is sleeved outside the second rotating shaft 22, and the other side of the limit plate 3 abuts against the nut 24. A limit nut can also be added to the outer end of the second rotating shaft 22.

[0048] By limiting each other among multiple structures, the second rotating shaft 22 will not move in the axial direction. Then, when there is at least one coil spring module 2 on each side of the working module 1, it can also be ensured that the first rotating shaft 12 will not fall off. When the working module 1 is only provided with a coil spring module 2 on one side, it is necessary to add a limiting nut to the first rotating shaft 12.

[0049] Further, such as Figure 1 As shown, a through hole is provided on the surface of the first shell 11, and when disassembly is performed, a rib is inserted to press against the first rotating shaft (12) where the pull rope (13) is located to limit rotation, thereby facilitating disassembly. The through hole may be circular, plum blossom-shaped, straight-shaped, or other shapes that match existing tools such as a screwdriver. Preferably, a through hole is also provided on the surface of the second shell (21).

[0050] When disassembling the coil spring module 2, the small hole is used to pass a hard object through the small hole to clamp the rotating wheel to fix it, and the second housing 21 and the second rotating shaft 22 are rotated in sequence or synchronously to facilitate the disassembly of the module.

[0051] Preferably, grease is filled between the multi-layer structure of the coil spring 23 for silencing and lubrication during operation.

[0052] The preferred usage scenario of the utility model is for trailers, especially semi-trailers, including a trailer head, the rear of the trailer head is connected to the trailer body, at least one line is suspended between the trailer head and the trailer body, the first shell 11 or the second shell 21 is fixedly connected to the trailer head or the trailer body, the pull rope 13 extends from the first shell 11 and is tied and fixed to the line body of the line, and the line includes but is not limited to a spiral air pipe and a power supply line.

[0053] There are many wires suspended between the front of the trailer and the trailer body. If they are not restricted, excessive shaking and collision with the vehicle body may easily cause damage. If they are fixed by a hard structure, they are easily damaged by vibration. Therefore, the preferred solution is to use a coil spring mechanism and tie the wires. The coil springs provide elastic support for the wires to reduce damage.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A superimposed coil spring module that is easy to install, characterized in that: It comprises a working module (1) and at least one coil spring module (2) connected to the working module (1); wherein: The working module (1) comprises a first shell (11), wherein a first rotating shaft (12) is rotatably connected inside the first shell (11), two ends of the first rotating shaft (12) extend from two sides of the first shell (11), and the first rotating shaft (12) is fixedly connected to one end of a pull rope (13); The coil spring module (2) comprises a second housing (21), the second housing (21) being rotatably connected to a second rotating shaft (22), two ends of the second rotating shaft (22) extending from two sides of the second housing (21), the second rotating shaft (22) being fixedly connected to an inner end of the coil spring (23), and an outer end of the coil spring (23) being fixedly connected to the second housing (21); A first fixed connection structure is provided between the side of the first shell (11) and the side of the second shell (21), and a second fixed connection structure is provided between the first rotating shaft (12) and the second rotating shaft (22), so that an integral rotating shaft formed by fixing the first rotating shaft (12) and the second rotating shaft (22) can generate relative rotation within the integral shell formed by the first shell (11) and the second shell (21).

2. The easy-to-install superimposed coil spring module according to claim 1, characterized in that: The first fixed connection structure refers to the threaded fit between the first housing (11) and the second housing (21), and the second fixed connection structure refers to the threaded fit between the first rotating shaft (12) and the second rotating shaft (22).

3. A stacked coil spring module that is easy to install as claimed in claim 2, characterized in that: A first external thread (111) is disposed on the side of the first shell (11), and a first internal thread (211) matching with the first external thread (111) is disposed on the side of the second shell (21); The end of the first rotating shaft (12) is provided with a second external thread (121), and the end of the second rotating shaft (22) is provided with a second internal thread (221) that matches the second external thread (121).

4. The easy-to-install superimposed coil spring module according to claim 3, characterized in that: The first external thread (111) and the second external thread (121) have opposite thread directions.

5. The easy-to-install superimposed coil spring module as claimed in claim 3, characterized in that: The first external thread (111) and the second external thread (121) have the same thread direction, the same number of thread turns, and the same thread pitch.

6. The easy-to-install superimposed coil spring module according to claim 5, characterized in that: The end of the second rotating shaft (22) is fixedly connected to a nut (24), and a second internal thread (221) is formed on a side of the nut (24) away from the second rotating shaft (22).

7. The easy-to-install superimposed coil spring module according to claim 6, characterized in that: A first external thread (111) is provided on the other side of the second housing (21) away from the first internal thread (211); and a second external thread (121) is provided on the other end of the second rotating shaft (22) away from the second internal thread (221).

8. The easy-to-install superimposed coil spring module according to claim 7, characterized in that: One side of the second housing (21) is open, one side of the coil spring (23) abuts against the inner wall of the other side of the second housing (21), the other side of the coil spring (23) abuts against one side of the limit plate (3), the limit plate (3) is sleeved outside the second rotating shaft (22), and the other side of the limit plate (3) abuts against the nut (24).

9. A trailer line suspension structure comprising a superimposed coil spring module as claimed in any one of claims 1 to 8, comprising a trailer head, the rear of the trailer head is connected to the trailer body, and at least one line is suspended between the trailer head and the trailer body, characterized in that: The first shell (11) or the second shell (21) is fixedly connected to the front of the trailer or the trailer compartment, and the pull rope (13) extends from the first shell (11) and is tied and fixed to the line body of the line.

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