Positioning pin for air pressure type pin pulling method

Abstract

The utility model discloses a positioning pin for an air pressure type pin pulling method. The positioning pin comprises a pin shaft and a high-pressure air connector, the pin shaft is conical, an air inlet hole is formed in the center of the pin shaft in the axial direction, and the high-pressure air connector is fixedly installed at the upper end of the air inlet hole. Compared with an existing locating pin, the locating pin is only provided with the air inlet hole and the high-pressure air connector, the locating pin is simple in structure and low in cost, and when the locating pin is used, the locating pin can be extruded out of the pin hole only by inputting high-pressure air into the air inlet hole. As no mechanical impact force or vibration exists when the positioning pin is used, the positioning pin is suitable for installing and taking out the positioning pin when parts of a precise mechanical structure are assembled, and the parts are not prone to being damaged and damaged due to the impact force and the vibration. And moreover, the precise resetting of each mounted part can be ensured, the mounting and debugging time is shortened, and the mounting labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to a positioning pin for a pneumatic pin pulling method. Background Technology

[0002] During the installation and removal of locating pins, because the locating pin and the pin hole use a transition or tapered extrusion fit, there is extrusive friction between the hole and the shaft after the locating pin is installed, making it difficult to remove. Standard locating pins generally use an internally threaded connecting rod, and the impact inertia force of a pin puller overcomes the friction to remove the locating pin. Figure 1 As shown, the existing pin puller uses the impact force of a hammer 4 to pull out the positioning pin 5, with the hammer 4 mounted on the pin puller rod 6. However, this often causes damage to the threads, making it impossible to remove the positioning pin and resulting in the scrapping of the positioned parts and significant economic losses. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a positioning pin for a pneumatic pin pulling method that is simple in structure, low in cost, and does not cause scrap or damage to parts during assembly.

[0004] The technical solution adopted by this utility model is: a positioning pin for a pneumatic pin pulling method, including a pin shaft and a high-pressure air connector; the pin shaft is tapered, and an air inlet hole is provided at the center of the pin shaft along the axial direction, and a high-pressure air connector is fixedly installed at the upper end of the air inlet hole.

[0005] Furthermore, the upper diameter of the air inlet is larger than the lower diameter, and the upper part of the air inlet is a threaded hole, with the high-pressure air connector screwed to the top of the air inlet.

[0006] Furthermore, the diameter of the lower part of the air intake is Φ0.5~Φ1mm.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] Compared to existing locating pins, this invention only requires an air inlet and a high-pressure air connector. Its structure is simple and low-cost. In use, high-pressure gas is simply introduced into the air inlet to force the locating pin out of the pin hole. Because this invention produces no mechanical impact or vibration during use, it is suitable for installing and removing locating pins during the assembly of precision mechanical components, minimizing damage to parts caused by impact or vibration. Furthermore, it ensures precise repositioning of all installed components, reducing installation and debugging time and labor intensity. Attached Figure Description

[0009] Figure 1 This is a structural diagram of an existing counterweight pin puller.

[0010] Figure 2 It is a structural diagram of the present utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 1-2 As shown, this utility model includes a pin 1 and a high-pressure air connector 2; the pin 1 is tapered, and an air inlet 11 is provided at the center of the pin 1 along the axial direction, and the high-pressure air connector 2 is fixedly installed at the upper end of the air inlet 11.

[0013] The upper diameter of the air inlet 11 is larger than the lower diameter, with the lower diameter being Φ0.5~Φ1mm. The upper part of the air inlet 11 is a threaded hole, and the high-pressure air connector 2 is screwed to the upper part of the air inlet 11.

[0014] The principle of this utility model is to utilize the closed space formed by the lower end of the pin 1 and the pin hole 3, inject high-pressure gas into the closed space through the air inlet 11 or draw a vacuum, and realize the removal or installation of the pin 1 through the gas pressure.

Claims

1. A pneumatic pin-pulling method using a locating pin, characterized in that: It includes a pin and a high-pressure air connector; the pin is tapered, and an axially oriented air inlet is provided at the center of the pin, with a high-pressure air connector fixedly installed at the upper end of the air inlet.

2. The locating pin used in the pneumatic pin-pulling method according to claim 1, characterized in that: The upper diameter of the air inlet is larger than the lower diameter, and the upper part of the air inlet is a threaded hole, with the high-pressure air connector screwed to the top of the air inlet.

3. The locating pin used in the pneumatic pin-pulling method according to claim 2, characterized in that: The diameter of the lower part of the air inlet is Φ0.5~Φ1mm.

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