Simple blind installation pin tool

Abstract

The utility model provides a simple blind installation pin tool which comprises a screw rod, a first left-handed nut, a first right-handed nut, a second left-handed nut and a second right-handed nut. A left-hand thread and a right-hand thread are respectively arranged at the two ends of the screw rod; the first left-handed nut and the second right-handed nut are respectively in threaded connection with a left-handed thread and a right-handed thread of the screw rod; and the second left-handed nut and the second right-handed nut are respectively in threaded connection with the left-handed thread and the right-handed thread of the screw rod. By means of the characteristic that threads at the two ends of the threaded rod are opposite in rotation direction, stable and controllable thrust is provided in a narrow space, the pin is gradually pressed into a part assembly hole, and accurate assembly is achieved; the tool is simple and compact in structure, does not need additional complicated operation steps, and is suitable for a blind installation environment limited by space; operation is convenient, and assembling can be completed through a conventional tool.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, especially relates to a simple blind pin tool. BACKGROUND

[0002] In the mechanical assembly process, the pin is widely used in the positioning, connection and transmission of parts as an important connecting piece. However, in the assembly of some complex components, especially in the case of blind pin assembly, the part is covered by other structures from the outside, and only internal assembly operation can be performed. In this case, the assembly difficulty of the pin is significantly increased.

[0003] In the prior art, the pin and the part are usually assembled in an interference fit mode, which requires a large pushing force to accurately assemble the pin into the hole. However, due to the limitation of the small space of the part cavity, the traditional methods such as knocking and hydraulic press fitting cannot be used, resulting in low assembly efficiency or even failure to complete the assembly. In addition, forcibly applying external force may cause deformation or damage of the part, affecting the assembly quality and product performance.

[0004] Therefore, it is urgent to design a simple structure, convenient operation and suitable for narrow space assembly tool to solve the problem of blind pin assembly, improve the assembly efficiency and ensure the assembly quality. UTILITY MODEL CONTENT

[0005] Based on the above problems, the purpose of the utility model is to provide a simple blind pin tool.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0007] A simple blind pin tool, comprising a screw rod, a first left-handed nut, a first right-handed nut, a second left-handed nut and a second right-handed nut.

[0008] The screw rod is provided with left-handed threads and right-handed threads at both ends;

[0009] The first left-handed nut and the second right-handed nut are screwed with the left-handed threads and the right-handed threads of the screw rod respectively, and are used to align the pin with the assembly hole and preliminarily press the pin by manually rotating the nut in the initial stage;

[0010] The second left-handed nut and the second right-handed nut are screwed with the left-handed threads and the right-handed threads of the screw rod respectively, and are used to press the pin into the assembly hole completely by further rotating the nut in the subsequent stage.

[0011] Among them, the screw nut rotation direction of the first left-handed nut and the first right-handed nut is opposite, and the screw nut rotation direction of the second left-handed nut and the second right-handed nut is also opposite.

[0012] As a preferred mode, the first left-handed nut and the first right-handed nut are both provided with guide ports.

[0013] As a preferred mode, the middle part of the screw rod is provided with a hexagonal.

[0014] Further preferably, the hexagonal of the screw rod can be adapted to a keyless ratchet wrench or other rotating tools.

[0015] The utility model discloses the beneficial effects are:

[0016] The blind pin tool of the utility model cooperates left-handed nut, right-handed nut and screw rod through design, utilizes the opposite rotation direction characteristics of the thread of the both ends of screw rod, makes left-handed nut, right-handed nut produce reverse linear motion when rotating screw rod, thereby provides stable and controllable thrust in the narrow space, gradually press the pin into the part assembly hole, realizes accurate assembly. The tool simple structure, compact, does not need additional complex operation steps, is applicable to the blind environment of space restriction, convenient operation can be completed assembly through conventional tool, simultaneously, the tool has higher durability and reliability, adapts to different working condition demand, has extensive practical value. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is blind pin tool assembly schematic drawing of the utility model;

[0018] Figure 2 It is blind pin tool working schematic drawing of the utility model;

[0019] Figure 3 It is screw rod schematic drawing of the utility model;

[0020] Figure 4 It is second left-handed nut schematic drawing of the utility model.

[0021] Wherein, 1 is part;2 is pin;3 is first left-handed nut;4 is first right-handed nut;5 is screw rod;5-1 is left-handed thread;5-2 is right-handed thread;5-3 is hexagonal. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in connection with the drawings.

[0023] Example 1:

[0024] As Figures 1-4 Shown, a kind of simple blind pin tool, including screw rod 5, first left-handed nut 3, first right-handed nut 4, second left-handed nut, second right-handed nut;

[0025] The both ends of the screw rod 5 are respectively provided with left-handed thread 5-1 and right-handed thread 5-2;

[0026] The first left-handed nut 3 and the second right-handed nut are respectively screwed with the left-handed thread 5-1 and the right-handed thread 5-2 of the screw rod 5, for aligning the pin 2 with the assembly hole and initially pressing in the initial stage;

[0027] The second left-handed nut and the second right-handed nut are respectively screwed with the left-handed thread 5-1 and the right-handed thread 5-2 of the screw rod 5 of the pin 2, for completely pressing the pin 2 into the assembly hole in the subsequent stage.

[0028] The nut rotation directions of the first left-handed nut 3 and the first right-handed nut 4 are opposite, and the nut rotation directions of the second left-handed nut and the second right-handed nut are also opposite.

[0029] The first left-handed nut 3 and the first right-handed nut 4 are both provided with guide ports.

[0030] The middle part of the screw rod 5 is provided with a hexagonal part 5-3, and the hexagonal part 5-3 of the screw rod 5 can be matched with a star wheel wrench or other rotating tools.

[0031] Embodiment 2:

[0032] A simple blind pin 2 tool mainly consists of a screw rod 5, a first left-handed nut 3, a first right-handed nut 4, a second left-handed nut and a second right-handed nut.

[0033] Firstly, the first left-handed nut 3 is screwed into the left-handed thread 5-1 of the screw rod 5, and the first right-handed nut 4 is screwed into the right-handed thread 5-2 of the screw rod 5, and a star wheel wrench is sleeved into the hexagonal part 5-3 of the screw rod 5;

[0034] Then the pin 2 is loaded into the guide ports of the first left-handed nut 3 and the first right-handed nut 4;

[0035] Further, the screw rod 5, the first left-handed nut 3, the first right-handed nut 4 and the pin 2 are put into the inside of the part 1, the first left-handed nut 3 and the first right-handed nut 4 are manually rotated to extend outward, the pin 2 is aligned with the left and right assembly holes of the part 1 and is pressed tightly (it is required to ensure that the first left-handed nut 3 and the first right-handed nut 4 extend outward by the same distance) ;

[0036] Then the star wheel wrench is used to rotate the screw rod 5, the internal threads of the first left-handed nut 3 and the first right-handed nut 4 are driven to rotate with the external threads of the screw rod 5, and since the rotation directions of the two end nuts are opposite, the nuts move linearly in the opposite direction and generate a pushing force to press the pin 2 into the part until the first left-handed nut 3 and the first right-handed nut 4 are close to the part;

[0037] Then the star wheel wrench is reversely rotated, the screw rod 5 is taken out, the first left-handed nut 3 and the first right-handed nut 4 are removed, and the second left-handed nut and the second right-handed nut are loaded on the screw rod 5.

[0038] Further, the screw rod 5, the second left-hand nut and the second right-hand nut are put into the inside of the part 1, the second left-hand nut and the second right-hand nut are manually rotated to extend outward, and the second left-hand nut, the second right-hand nut and the pin 2 are tightly contacted (the distance of the second left-hand nut and the second right-hand nut rotating outward is basically the same) ;

[0039] Then, the screw rod 5, the second left-hand nut and the second right-hand nut are rotated by using the star wheel wrench to move in the opposite direction, a thrust force is generated to further press the pin 2 into the part 1, and the pin 2 is assembled to the required assembly requirement.

[0040] Finally, the star wheel wrench is reversely rotated, the screw rod 5, the second left-hand nut and the second right-hand nut are taken out, and the pin 2 is assembled.

[0041] In the work, the star wheel wrench is reversely rotated to realize the back and forth movement of the nut on the screw rod 5, the principle is that the screw rod 5 is rotated, the matched nut moves in a straight line on the screw rod 5 axis to generate a thrust force to press the pin 2 to realize the assembly of the pin 2. The tooling structure is simple, convenient to operate and practical.

[0042] The above embodiments of the utility model are only examples for describing the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes and variations can be made on the basis of the above description. All the embodiments cannot be exhausted. Any obvious changes or variations derived from the technical scheme of the utility model are still within the protection scope of the utility model.

Claims

1. A simple blind pinning tool, characterized by: The screw rod, the first left-handed nut, the first right-handed nut, the second left-handed nut and the second right-handed nut are arranged in sequence. The screw rod is provided with left-handed thread and right-handed thread at two ends respectively. The first left-handed nut and the second right-handed nut are screwed with the left-handed thread and the right-handed thread of the screw rod respectively, and are used for aligning the pin with the assembly hole of the part and initially pressing in the first stage. The second left-handed nut and the second right-handed nut are screwed with the left-handed thread and the right-handed thread of the screw rod respectively, and are used for completely pressing the pin into the assembly hole of the part in the second stage. The screw rod is provided with left-handed thread and right-handed thread at two ends respectively.

2. The simple blind pinning tooling of claim 1, wherein: The screw rod is provided with left-handed thread and right-handed thread at two ends respectively.

3. The simple blind pinning tooling of claim 1, wherein: The screw rod is provided with hexagon in the middle.

4. The simple blind pinning tool of claim 3, wherein: The hexagon of the screw rod is matched with the wrench.

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