Tensioning device

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a tensioning device which comprises an oil cylinder shaft and an oil cylinder sleeve, one end of the oil cylinder shaft is sleeved with the oil cylinder sleeve, a limiting table is arranged on the outer wall of the oil cylinder sleeve in a fixed structure mode, one end of the oil cylinder sleeve is fixedly connected with a pull rod, and the end, away from the oil cylinder sleeve, of the pull rod is sleeved with a limiting base. The pull rod penetrates through the limiting base and is provided with a nut in a threaded meshing mode, the nut is arranged on the side, away from the oil cylinder sleeve, of the limiting base, one side of the limiting base is provided with a bottom frame in a detachable structure, the bottom frame is provided with a containing cavity for containing the nut, and the pull rod between the limiting table and the limiting base and the oil cylinder sleeve are sleeved with a spring. An original support is changed into a split type underframe and a limiting seat, an integrated type is changed into a split type, connection of a nut and a pull rod is facilitated, the installation difficulty is reduced, poor assembly caused by the fact that an inner hole of the original structure support is too long is avoided, and the installation efficiency is improved.

Description

Technical field:

[0001] The present application relates to the technical field of engineering machinery, and in particular to a tensioning device. Background technology:

[0002] Our company's Chinese utility model patent application number CN202221628551.9 is a new type of tensioning device, including a pull rod, one end of the pull rod is connected to the bracket, and the other end is connected to the cylinder body, one end of the spring abuts against the stepped platform of the cylinder body, and the other end abuts against the stepped platform of the end face of the bracket, the center of the bracket is provided with a pull rod through hole and a nut accommodating hole that are interconnected, one end of the pull rod passes through the pull rod through hole and is threadedly connected to the nut in the nut accommodating hole, one end face of the nut is provided with a first convex spherical surface with a threaded hole, and the end of the nut accommodating hole close to the pull rod through hole is provided with a first concave spherical surface that cooperates with the first convex spherical surface.

[0003] When installing the bolts in the bracket of the patent application, the limited space makes it difficult to install the bolts, especially when the bracket is too long, which greatly increases the difficulty of production and reduces production efficiency. Utility model content:

[0004] In order to solve the above technical problems, the utility model provides a tensioning device, which solves the technical problem that the bolts in the bracket are difficult to install and the efficiency is low. In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A tensioning device, comprising:

[0006] Cylinder shaft and cylinder sleeve, one end of the cylinder shaft is sleeved in the cylinder sleeve;

[0007] A tie rod, one end of which is connected to one end of the cylinder sleeve;

[0008] A limit seat, wherein the limit seat sleeve is arranged outside the end of the pull rod away from the cylinder sleeve;

[0009] A nut, the nut is arranged on a side of the limit seat away from the cylinder sleeve by means of thread engagement;

[0010] A base frame, which is detachably arranged on one side of the limit seat and is provided with a receiving cavity for placing the nut;

[0011] A limit platform, which is arranged on the outer wall of the cylinder sleeve in a fixed structure;

[0012] The spring is sleeved on the outside of the pull rod and the cylinder sleeve between the limit platform and the limit seat.

[0013] Furthermore, the base frame is connected to the limiting seat by bolts.

[0014] Furthermore, the nut is a hexagonal nut; the shape of the accommodating cavity is adapted to the outer shape of the nut, and the nut and the side wall of the accommodating cavity are gap-matched.

[0015] The beneficial effects of the utility model are: changing the original bracket design to a split base frame and limit seat, and changing from an integrated type to a split type, which facilitates the connection between the nut and the pull rod, reduces the difficulty of installation, avoids poor assembly caused by the excessively long inner hole of the original structural bracket, and improves installation efficiency.

[0016] The accommodating cavity is designed to have the same shape as the nut. Firstly, the nut can be rotated using the accommodating cavity of the base frame without the need for tools such as wrenches; secondly, it can prevent the nut from loosening during operation and improve the stability of the structure. Description of the drawings:

[0017] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model.

[0018] Figure 2 It is a left-side structural schematic diagram of the utility model.

[0019] In the figure:

[0020] 1. Cylinder shaft, 2. Cylinder sleeve, 3. Pull rod, 4. Limit seat, 5. Nut, 6. Base frame, 7. Limit platform, 8. Spring. Specific implementation method:

[0021] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0022] A tensioning device comprises a cylinder shaft 1 and a cylinder sleeve 2, one end of the cylinder shaft 1 is sleeved in the cylinder sleeve 2, a limit platform 7 is arranged on the outer wall of the cylinder sleeve 2 in a fixed structure manner, a pull rod 3 is fixedly connected to one end of the cylinder sleeve 2, a limit seat 4 is sleeved on the outer side of the end of the pull rod 3 away from the cylinder sleeve 2, the pull rod 3 passes through the limit seat 4 and is provided with a nut 5 by threaded engagement, the nut 5 is arranged on the side of the limit seat 4 away from the cylinder sleeve 2, a base frame 6 is arranged on one side of the limit seat 4 in a detachable structure, the base frame 6 is provided with a accommodating cavity for accommodating the nut 5, a spring 8 is sleeved on the outer side of the pull rod 3 and the cylinder sleeve 2 between the limit platform 7 and the limit seat 4, the original bracket is changed into a split base frame 6 and limit seat 4, and the integrated type is changed into a split type, so as to facilitate the connection between the nut 5 and the pull rod 3, reduce the difficulty of installation, avoid poor assembly caused by the excessively long inner hole of the original structure bracket, and improve the installation efficiency.

[0023] Specifically, the base frame 6 is connected to the limiting seat 4 via bolts 9 .

[0024] It should be noted that the nut 5 is a hexagonal nut 5; the shape of the accommodating cavity is adapted to the outer shape of the nut 5, and the clearance between the nut 5 and the side wall of the accommodating cavity is matched. The accommodating cavity 10 is designed to be the same as the outer shape of the nut. On the one hand, the nut can be rotated using the accommodating cavity of the base frame without the need for tools such as wrenches; on the other hand, it can prevent the nut from loosening during operation and improve the stability of the structure.

[0025] The working principle and working process of the utility model are as follows:

[0026] Sleeve the limit seat 4 on one end of the pull rod 3, and turn the nut 5 by hand to engage with the thread of the pull rod 3 until it fits with the limit seat 4. At this time, the nut 5 cannot be turned by hand. Sleeve the accommodating cavity 10 of the base frame 6 on the outside of the nut 5, and drive the nut 5 to rotate by rotating the base frame 6 until it reaches the predetermined position. Connect the base frame 6 and the limit seat 4 with the bolts 9 to complete the assembly work.

[0027] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. A tensioning device, characterized in that: include: A cylinder shaft (1) and a cylinder sleeve (2), wherein one end of the cylinder shaft (1) is sleeved in the cylinder sleeve (2); A pull rod (3), one end of which is connected to one end of the cylinder sleeve (2); A limit seat (4), the limit seat (4) is sleeved on the outside of one end of the pull rod (3) away from the cylinder sleeve (2); A nut (5), the nut (5) being arranged on a side of the limit seat (4) away from the cylinder sleeve (2) by means of threaded engagement; A base frame (6), the base frame (6) is disposed on one side of the limiting seat (4) in a detachable structure, and the base frame (6) is provided with a receiving cavity (10) for accommodating the nut (5); A limit platform (7), the limit platform (7) is arranged on the outer wall of the cylinder sleeve (2) in a fixed structure manner; A spring (8) is sleeved on the outside of the pull rod (3) and the oil cylinder sleeve (2) between the limiting platform (7) and the limiting seat (4).

2. A tensioning device according to claim 1, characterized in that: The base frame (6) is connected to the limiting seat (4) via bolts (9).

3. A tensioning device according to claim 1 or 2, characterized in that: The nut (5) is a hexagonal nut (5); the shape of the accommodating cavity (10) is matched with the outer shape of the nut (5), and the nut (5) and the side wall of the accommodating cavity (10) are clearance-matched.

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