Manufacturing process for integral output shaft of linear actuator

Abstract

A manufacturing process of an integral type output shaft of a linear actuator comprises the steps that firstly, an optical shaft with the same outer diameter is selected, and the middle section of the optical shaft serves as a guide end to be drilled; then, processing the front section part of the optical axis into a signal transmitting and receiving end with a smaller outer diameter, performing external thread processing on the rear section part of the optical axis as a signal output end, and performing external thread processing on the rear half section part of the signal transmitting and receiving end of the optical axis as a signal transmitting end; the outer diameter of the front half section of the signal transmitting and receiving end of the optical axis is kept unchanged, and the front half section serves as a signal receiving end and is in direct butt joint with a circuit board signal transmitting end of a tail cover assembly of the linear actuator, and finally an integral output shaft finished product is manufactured. The machining process is simplified, machining and mounting are convenient and fast, the integral output shaft cannot be affected by high-temperature deformation, the outer diameter matching is uniform, manufacturing of various molds is reduced, the working stability is guaranteed, and the quality of the integral output shaft is guaranteed.

Description

Technical Field

[0001] The invention relates to a manufacturing process of an output shaft of an actuator of a power drive device. Background Art

[0002] Power drive devices can be divided into linear actuators, rotary actuators, etc. Linear actuators are actuators that output linear motion, while rotary actuators output rotary motion. Linear actuators (motors) consist of rotors and stators. The rotor is a rotating component that is used to convert electrical energy into mechanical energy and vice versa. At present, linear actuators generally include a brush holder assembly (including a brush holder body, an inductor, a carbon brush, a carbon brush spring, a bearing, etc.), a tail cover assembly (including a tail cover body, a circuit board signal sending end, a magnet, a signal receiving end), a stator assembly (including a magnetic tile, a stator housing), and a rotor assembly (including a rotor and silicon steel sheets, a rotor shaft, a commutator, an output shaft, etc.), wherein the output shaft is a metal shaft and is composed of a signal output end, a guide end, a signal transmission end, etc., each with different outer diameters and in sections. An outwardly protruding special-shaped structure needs to be designed on the periphery of the guide end (the special-shaped structure needs to be machined and polished) to facilitate its connection with the guide sleeve; the signal transmission end is docked with the signal receiving end of the tail cover assembly. The signal receiving end is made of plastic and needs to match multiple sizes. The investment cost of the injection mold is relatively high. The signal receiving end, which is made of plastic, is also prone to deformation and unstable receiving signals under high temperature conditions. The signal output end, guide end, and signal transmission end of the metal output shaft have different outer diameters, greatly different appearances, high processing requirements, complicated processing and manufacturing processes, low work efficiency, and it is difficult to ensure the overall quality of the output shaft. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies in the prior art and to provide a manufacturing process for an integral output shaft of a linear actuator with simplified process, convenient processing and stable operation.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the manufacturing process of the integral output shaft of the linear actuator is as follows: first, an optical shaft with the same outer diameter is selected, and the middle section of the optical shaft is drilled as a guide end to prepare a foundation for the subsequent hole position pin and the connection with the guide sleeve; then, the front section of the optical shaft is processed into a signal transmission and receiving end with a smaller outer diameter, and then the rear section of the optical shaft is processed with external threads as the signal output end, and the rear half of the signal transmission and receiving end of the optical shaft is processed with external threads as the signal transmission end, and the outer diameter of the front half of the signal transmission and receiving end of the optical shaft remains unchanged as the signal receiving end and is directly connected to the circuit board signal sending end of the tail cover assembly of the linear actuator, and finally the integral output shaft finished product is obtained.

[0005] The optical axis is made of metal.

[0006] The rear half of the signal transmission and receiving end of the optical axis is processed as a signal transmission end to form a threaded tube shape with external threads.

[0007] After adopting the present invention, the outer diameter of the optical axis needs to be processed only for the signal transmission receiving end, and the guide end of the optical axis does not need to be processed for the outer diameter and protrusion profile, but is directly replaced by the drilling process, which simplifies the processing process and is convenient for processing and installation. The tail cover assembly to which the integral output shaft made by the present invention is connected does not have the original signal receiving end (plastic) but is directly replaced by the signal receiving end (metal) of the integral output shaft, which will not be affected by high temperature deformation and has a uniform outer diameter matching, which reduces the production of multiple molds, reduces the investment cost, and ensures the stability of the work. Thereby improving the work efficiency and ensuring the quality of the integral output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The present invention is a schematic structural diagram of the integrated output shaft and the tail cover assembly connected.

[0009] Figure 2 The schematic diagram of the structure of the linear actuator used for the integral output shaft made by the present invention. DETAILED DESCRIPTION

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0011] Reference Figure 1It can be seen that the manufacturing process of the integral output shaft of the linear actuator of the present invention is as follows: first, select an optical shaft with the same outer diameter (slightly longer than the length of an ordinary output shaft of the same specification, with an outer diameter of 5.5 mm and a length of 138 mm, and the outer diameter error range is ±0.2 mm), and drill the middle section of the optical shaft (the outer diameter remains unchanged) as the guide end 6 (using a lathe) to prepare a foundation for the subsequent hole position pin and the connection with the guide sleeve; then, the front section of the optical shaft (the right side of the optical shaft) is processed (using a lathe) to have a smaller outer diameter (the outer diameter is 3.4 mm) signal transmission and receiving end, and then the rear section of the optical axis (the left side of the optical axis, the outer diameter remains unchanged) is processed as the signal output end 5, and the rear half of the signal transmission and receiving end of the optical axis (the left side of the signal transmission and receiving end) is processed as a threaded tube as the signal transmission end 9, and the outer diameter of the front half of the signal transmission and receiving end of the optical axis (the right side of the signal transmission and receiving end) remains unchanged as the signal receiving end 7 and directly docks with the circuit board signal sending end 12 of the tail cover assembly of the linear actuator, and finally the integral output shaft product is obtained. The material of the optical axis is metal material. This integral output shaft is made of metal material and is composed of a signal output end 5, a guide end 6, and a signal transmission and receiving end (including a signal transmission end 9 and a signal receiving end 7) in sequence. The tail cover assembly 1 includes a tail cover body 11, a circuit board signal sending end 12, and a magnet 13. The signal receiving end (plastic part) originally extending outward is removed and directly replaced by the signal receiving end 7 of the integral output shaft.

[0012] like Figure 2 As shown, the linear actuator used for the integral output shaft made by the present invention includes a tail cover assembly 1 (including a tail cover body 11, a circuit board signal sending end 12, a magnet 13, etc.), a brush holder assembly 2 (including a brush holder body, an inductor, a carbon brush, etc.), a rotor assembly 3 (including a rotor 31, a rotor shaft 32, an integral output shaft 33, a commutator 34, etc.), and a stator assembly 4 (including a magnetic tile 41, a stator housing 42, etc.). The integral output shaft 33 is made of metal material and is composed of a signal output end 5 (with external threads, the outermost end), a guide end 6, and a signal transmission and receiving end in sequence. The signal transmission and receiving end includes a signal transmission end 9 (with external threads) and a signal receiving end 7 (the innermost end). The guide end 6 is provided with a through hole 61, and the through hole 61 is connected to the guide sleeve 8 through a pin 62. The signal receiving end 7 is connected to the circuit board signal sending end 12 of the tail cover assembly. The rotor shaft 32 has an internal thread that is connected to the external thread on the signal transmission end 9 to rotate, so that the integral output shaft 33 simultaneously performs a linear telescopic motion and outputs power from the signal output end 5 .

Claims

1. The manufacturing process of the integral output shaft of the linear actuator is characterized by: First, an optical axis with the same outer diameter is selected, and the middle section of the optical axis is drilled as a guide end to prepare for the subsequent hole position pin and the connection with the guide sleeve; then, the front section of the optical axis is processed into a signal transmission and receiving end with a smaller outer diameter, and then the rear section of the optical axis is processed with external threads as a signal output end, and the rear half of the signal transmission and receiving end of the optical axis is processed with external threads as a signal transmission end. The outer diameter of the front half of the signal transmission and receiving end of the optical axis remains unchanged as a signal receiving end and is directly connected to the circuit board signal sending end of the tail cover assembly of the linear actuator, and finally an integral output shaft product is obtained.

2. The manufacturing process of the integrated output shaft of the linear actuator according to claim 1, characterized in that: The optical axis is made of metal.

3. The manufacturing process of the integrated output shaft of the linear actuator according to claim 1 or 2, characterized in that: The rear half of the signal transmission and receiving end of the optical axis is processed as a signal transmission end to form a threaded tube shape with external threads.

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