Cotter pin mounting clamp

Abstract

The utility model belongs to the technical field of installation bolt safety, and particularly relates to a cotter pin installation clamp which is composed of an upper jaw and a lower jaw, the middle of the upper jaw and the middle of the lower jaw are mutually embedded together through a cylinder on a lower jaw, the upper jaw and the lower jaw rotate through the cylinder when the cotter pin installation clamp is used, and the rear sections of the upper jaw and the lower jaw are handles. The cotter pin mounting clamp is small in size, can be used in a narrow and small non-open space in the aircraft assembling process, and is simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of bolt safety technology, and is a tool for quickly and properly installing cotter pins on bolts, especially suitable for installing cotter pins with left and right split prongs. Background Technology

[0002] Using cotter pins to loosen bolts is a common method in aircraft manufacturing and assembly, where many bolts are secured with cotter pins on their heads. However, in practice, cotter pins are often longer than the bolt diameter. When using a punch to cut the cotter pin in the bolt slot, the pin length is frequently unsuitable, and the impact cutting process can damage the bolt threads. This makes disassembling the bolt extremely difficult, and improperly installed cotter pins require removal and reinstallation, which is time-consuming and labor-intensive. Using the installation tool described in this invention avoids damaging the threads and allows for quick and efficient cotter pin installation. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to change the previous installation method of using a punch to cut off the cotter pin feet. Instead, a cotter pin installation tool is used to directly bend and cut the cotter pin to a suitable length, and then pressure is used to press the cotter pin feet into the nut opening groove to complete the installation of the cotter pin.

[0004] Technical solution: The present invention proposes a cotter pin installation pliers, which mainly consists of two parts, an upper jaw and a lower jaw. The upper jaw and the lower jaw are interlocked in the middle by a cylinder on the lower jaw. In use, the upper jaw and the lower jaw rotate through this cylinder. The rear part of the upper jaw and the lower jaw are handles.

[0005] Furthermore, the bevel portion of the upper edge is flattened to accommodate the opening slot on the nut.

[0006] Furthermore, the jaw of the lower jaw is wide, and there are threads on the inside of the jaw that are the same as those on a bolt.

[0007] Furthermore, both the upper and lower guards have a bladed section in the middle, used to cut the cotter pin to the appropriate length during installation.

[0008] Furthermore, the handle is covered with rubber.

[0009] Furthermore, the handles of both the upper and lower guards are arc-shaped.

[0010] When in use, the split pin is inserted into the bolt, the split pin legs are separated on the left and right sides, the split pin legs are cut off by using the split pin pliers, the upper jaw of the split pin pliers is aligned with the opening groove on the nut, the lower jaw clamps the threaded part of the bolt head, finally, pressure is applied to the handle part, the pressure is transmitted to the upper and lower jaws to press the split pin legs into the opening groove of the nut, and the installation of the split pin is completed.

[0011] Technical effects: The split pin installation pliers in the utility model are small in shape, can be used in narrow and small non-open spaces in the aircraft assembly process, and avoid the disadvantages of the previous installation method. Moreover, the threads on the inner side of the lower jaw head of the installation pliers are matched with the bolts on the bolt head, and the threads on the bolts are not damaged when pressure is applied, the size of the impact force cannot be accurately controlled when the punch is used for installation, and the threads on the bolts are easily damaged when the punch is used. The larger the split pin installed on the larger bolt is, the larger the force required for cutting off by using the punch is, and it is very small to cut off the larger split pin by using the punch. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the outer shape of the split pin installation pliers;

[0013] Figure 2 is a schematic view of installing the split pin by using the split pin pliers;

[0014] Wherein: 1 is the upper jaw, 2 is the lower jaw, 3 is the handle, 4 is the split pin, 5 is the bolt, and 6 is the nut. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the utility model is described in detail below in combination with the drawings or specific implementation cases. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described and these examples should not be understood as being limited to the examples set forth herein. On the contrary, these examples are described so that the positive effects of the utility model are more embodied, and the details not described in the text are regarded as known or conventional technical means in the art.

[0016] Referring to the drawings Figure 1The utility model discloses a special split pin installation pincers, and the installation pincers mainly include two parts, which are composed of upper tong 1 and lower tong 2. The upper tong 1 and the lower tong 2 are mutually embedded together through the cylinder on the lower jaw 2 at the middle part. When in use, the upper tong 1 and the lower tong 2 are both rotated through the cylinder. The rear section of the upper tong 1 and the lower tong 2 is both sleeved with a rubber handle 3. The tong mouth part of the upper tong 1 is flat to adapt to the split groove on the nut. The tong mouth part of the lower tong 2 is wide, and there is a same thread as the bolt inside the tong mouth of the lower tong 2. The middle part of the upper tong 1 and the lower tong 2 is both provided with a section with a blade for cutting the split pin to a proper length when installing.

[0017] The width of the head of the upper tong 1 of the split pin pincers in the utility model needs to be adapted to the split groove on the nut. When in use, the head of the upper tong 1 can be pressed into the split groove on the nut. The inside of the head of the lower jaw 2 is provided with an arc and a thread. The thread is matched with the thread of the installation bolt. When clamping, the thread of the bolt can be prevented from being damaged.

[0018] When installing, the split pin needs to be first inserted into the bolt. The split pin pin foot is separated on the left and right sides. The blade part of the split pin pincers is used to place the split pin pin foot on the embedded blade 7 part one by one. The pressure is applied to the handle 3 to cut the split pin pin foot. The split pin pin foot is clamped on the upper tong 1 of the split pin pincers above the split groove on the nut 4. The lower tong 2 clamps the thread part of the head of the bolt 5. Finally, the pressure is applied to the handle 3 part. The pressure is transmitted to the upper and lower tongs to press the split pin pin foot into the split groove of the nut 6. The installation of one side of the split pin pin foot is completed. The same method is used to complete the installation of the other side of the split pin pin foot. Finally, the split pin installation pincers are removed, and the installation of the split pin is completed.

[0019] The above specific embodiments or cases are only used for explaining the technical scheme of the utility model, and are not limited to the application. The parts not described in detail are regarded as the conventional technical means or common knowledge in the art. It can be understood by those skilled in the art that: based on the design idea of the application, the technical scheme recorded in the foregoing embodiments can be adaptively modified, or some or all of the technical features can be replaced equivalently. The modified, equivalent, adaptive improved technical scheme does not deviate from the technical essence of the utility model and should be covered in the protection scope of the application.

Claims

1. An open end pin installation tool characterized by, The installation pliers are composed of an upper jaw and a lower jaw, the upper jaw and the lower jaw are mutually sleeved at the middle part through a cylinder on the lower jaw, the upper jaw and the lower jaw are rotated through the cylinder during use, and the rear sections of the upper jaw and the lower jaw are handles; the jaw mouth part of the upper jaw is flat to adapt to the open slot on the nut; the jaw mouth part of the lower jaw is wide, and there is a same thread as the bolt on the inner side of the jaw mouth of the lower jaw.

2. A pin installing pliers according to claim 1, wherein The middle parts of the upper jaw and the lower jaw are provided with a section with a blade for cutting the cotter pin to a proper length during installation.

3. An installation tool as defined in claim 1 wherein, Rubber is sleeved on the handle.

4. An installation tool as defined in claim 1 wherein, The handles of the upper jaw and the lower jaw are circular arc shapes.

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