Novel internal thread limiting cylindrical pin for motor

Abstract

The utility model discloses a novel internal thread limiting cylindrical pin for a motor, and belongs to the technical field of aviation motor process manufacturing. The internal thread limiting cylindrical pin is of a columnar structure and is divided into two parts, the upper part is a pin head (1), the lower part is a pin rod (2), and an internal thread hole (3) is formed in the center of the top of the pin head (1); the space occupied by the limiting device is saved, the space utilization rate in the motor is improved, and the limiting device has good guiding significance for the design of small-size motors. The device has the characteristics of convenience in use, high efficiency, strong universality, easiness in maintenance and the like.

Description

Technical Field

[0001] This utility model discloses a novel internal thread limiting cylindrical pin for motors, belonging to the field of aerospace motor manufacturing technology. Background Technology

[0002] In some aircraft models, the motor needs to control the angular displacement range of the shaft extension end. Limiting methods can generally be achieved through electrical or mechanical limiting. Mechanical limiting requires restricting the movement range of the shaft extension end. This process necessitates a limiting pin engaging within a limiting groove in the moving part to achieve mechanical limiting. Generally, the pin head or the entire internal thread of a limiting pin is cylindrical, and the internal thread does not completely penetrate the pin. In micro-motors, internal space is limited, and the limiting groove space of the moving part is small, while conventional limiting pins require larger limiting groove spaces and larger pin holes. This utility model is applied to this scenario. Summary of the Invention

[0003] The purpose of this utility model is:

[0004] When the motor is mechanically limited, the range of motion of the shaft extension needs to be restricted. This process requires the limiting pin to be engaged in the limiting groove of the moving part to achieve mechanical limitation.

[0005] The technical solution of this utility model is: a novel internal thread limiting cylindrical pin for motors. The internal thread limiting cylindrical pin has a columnar structure and is divided into two parts: the upper part is the pin head 1 and the lower part is the pin rod 2. An internal thread hole 3 is provided at the center of the top of the pin head 1.

[0006] The pin head 1 has a flat, cylindrical structure on both sides.

[0007] The pin rod 2 is cylindrical and has a chamfer at the bottom.

[0008] The chamfer is 15°.

[0009] The internal threaded hole 3 penetrates the entire pin.

[0010] The height of the pin head 1 is 1.8mm, the height of the pin rod 2 is 3.6mm, and the height ratio of the pin head 1 to the pin rod 2 is 1:2.

[0011] The thread of the internal threaded hole 3 is a standard coarse right-hand thread.

[0012] The limiting cylindrical pin is made of stainless steel.

[0013] The beneficial effects of this utility model are:

[0014] 1. Easy to use, highly efficient, versatile, and easy to maintain.

[0015] 2. It saves space occupied by limit devices, improves the space utilization rate inside the motor, and has good guiding significance for the design of small-sized motors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Wherein: 1-pin head, 2-pin shank, 3-internal threaded hole Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, a novel internally threaded limiting cylindrical pin for motors is disclosed. This internally threaded limiting cylindrical pin has a cylindrical structure divided into two parts: an upper pin head 1 and a lower pin shank 2. An internally threaded hole 3 is located at the center of the top of the pin head 1, penetrating the entire pin. The thread in the internally threaded hole 3 is a standard coarse-pitch right-hand thread. The flat structures on both sides of the pin head facilitate fixing with clamps, allowing assembly fixtures with external threads to be screwed into the pin hole. The flat structures on both sides of the pin head can be used for directional positioning during installation and save on the size of the limiting groove, providing good guidance for the limiting design of small-sized motors. The dimensions of the pin can be modified accordingly based on the limiting requirements of different products.

[0020] The use of internal threads in the installation method avoids excessive force on the pin during installation or disassembly using other clamping fixtures, which could damage or deform the pin head and affect its positioning fit with the limiting groove. The fully penetrating pin hole allows the pin assembly tool to be continuously screwed into the threaded hole until it reaches the bottom. The force generated by the threaded fit between the internally threaded limiting cylindrical pin and the pin assembly tool then pushes the pin out.

[0021] The pin rod 2 is cylindrical and has a chamfer at the bottom, which is 15°.

[0022] The height of the pin head 1 is 1.8mm, the height of the pin rod 2 is 3.6mm, and the height ratio of the pin head 1 to the pin rod 2 is 1:2.

[0023] The limiting cylindrical pin is made of stainless steel.

[0024] During installation, first use a clamp to hold the pin on both sides of the flat surface of the locating cylindrical pin head. Then, screw the externally threaded pin assembly tool into the center hole of the locating cylindrical pin and remove the clamp. After adjusting the installation direction of the locating cylindrical pin, use a press and the pin assembly tool to press the locating cylindrical pin into the pin hole. Then, unscrew the pin assembly tool to complete the installation of the locating cylindrical pin. For disassembly, screw the pin assembly tool into the bottom of the screw hole and continue rotating. The force generated by the threaded engagement between the internally threaded locating cylindrical pin and the pin assembly tool will push the locating cylindrical pin out.

Claims

1. A novel internally threaded limiting cylindrical pin for motors, characterized in that, The internal thread limiting cylindrical pin has a columnar structure and is divided into two parts: the upper part is the pin head (1) and the lower part is the pin rod (2). An internal thread hole (3) is provided at the center of the top of the pin head (1). The pin head (1) is a cylindrical structure with flat sides.

2. The novel internally threaded limiting cylindrical pin for motors according to claim 1, characterized in that, The pin rod (2) is cylindrical and has a chamfer at the bottom.

3. The novel internally threaded limiting cylindrical pin for motors according to claim 2, characterized in that... The chamfer is 15°.

4. The novel internally threaded limiting cylindrical pin for motors according to claim 1, characterized in that, The internal threaded hole (3) extends through the entire pin.

5. The novel internally threaded limiting cylindrical pin for motors according to claim 1, characterized in that, The height of the pin head (1) is 1.8mm, the height of the pin rod (2) is 3.6mm, and the height ratio of the pin head (1) to the pin rod (2) is 1:

2.

6. The novel internally threaded limiting cylindrical pin for motors according to claim 1, characterized in that, The thread of the internal threaded hole (3) is a common coarse right-hand thread.

7. The novel internally threaded limiting cylindrical pin for motors according to claim 1, characterized in that, The limiting cylindrical pin is made of stainless steel.

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