Automobile commutator gear shaft phase angle detection tool

Abstract

The application relates to a phase angle detection tool for a gear shaft of an automobile commutator, and relates to the technical field of product detection. The tool comprises a positioning sleeve, the positioning sleeve comprises a rear sleeve part for sleeving a shaft part of the gear shaft and a front sleeve part for sleeving a gear part of the gear shaft, an upper end of a rear end face of the rear sleeve part is fixedly connected with a positioning plate, an inner wall face of the positioning plate can abut against a process section on a positioning convex ring of the gear shaft, left and right ends of a front end face of the front sleeve part are respectively provided with an observation gap, the rear end face of the rear sleeve part can abut against the positioning convex ring of the gear shaft, a first positioning step is further arranged on the inner wall face of the rear sleeve part, and the length of the front sleeve part is smaller than the length of the gear part of the gear shaft. The application can improve the detection efficiency and accuracy of the phase angle.

Description

Technical Field

[0001] This invention relates to the field of product testing technology, and in particular to a tool for testing the phase angle of a car commutator gear shaft. Background Technology

[0002] After the commutator gear shaft in an automobile is milled, its phase angle needs to be measured. Typically, a square locating hole is provided at the rear end of the gear shaft (the specific structure of the gear shaft is as follows...). Figure 1-2 As shown), one of the inner walls of the square positioning hole can be used as a reference surface. Then, a point is taken at the corresponding length position on the gear segment (by a pre-calculated position), and the angle between this point and the reference surface is 90 degrees. If the position of this point is the tip of the gear tooth, then the phase angle of the gear shaft is qualified.

[0003] In reality, existing phase angle detection methods are extremely inconvenient. Utilizing the aforementioned principles and relying on drawing triangular coordinates on the gear shaft for detection is time-consuming and prone to distortion in angle measurement. However, by setting a process section parallel to the inner wall of the square positioning hole on the side of the positioning convex ring of the gear shaft, this process section can be used as a reference surface for positioning. Then, by using an auxiliary fixture to engage with the reference surface, a better approach can be provided for improving the phase angle detection method for gear shafts. Summary of the Invention

[0004] The purpose of this invention is to provide a phase angle detection tool for automotive commutator gear shafts, so as to improve the detection efficiency and accuracy of phase angle.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a phase angle detection tool for an automotive commutator gear shaft, comprising a positioning sleeve, the positioning sleeve comprising a rear sleeve portion for fitting the shaft portion of the gear shaft and a front sleeve portion for fitting the gear portion of the gear shaft, a positioning plate fixedly connected to the upper end of the rear end face of the rear sleeve portion, the inner wall surface of the positioning plate being able to abut against the process cut surface on the gear shaft positioning convex ring, an observation notch being provided at the left and right ends of the front end face of the front sleeve portion, the rear end face of the rear sleeve portion being able to abut against the gear shaft positioning convex ring, a first positioning step being provided on the inner wall surface of the rear sleeve portion, and the length of the front sleeve portion being less than the length of the gear portion of the gear shaft.

[0006] Preferably, the first positioning step is located in the middle of the rear sleeve, and a second positioning step is also provided on the inner wall surface of the front end of the rear sleeve.

[0007] More preferably, the outer diameter of the rear sleeve is larger than the outer diameter of the front sleeve.

[0008] More preferably, the front sleeve, the rear sleeve, and the positioning plate are integrally formed.

[0009] The beneficial effects of this invention are as follows: by fitting the positioning sleeve onto the gear shaft, the rear end face of the rear sleeve can abut against the positioning convex ring of the gear shaft, and at the same time, the inner wall surface of the positioning plate can abut against the process cut surface. At this time, the positions of the two observation notches can be located on the left and right sides of the gear shaft gear part. By checking whether the observation notches can be aligned with the tooth tip of the gear, it can be determined that the phase angle of the product meets the requirements. This tool can significantly improve the detection efficiency and accuracy of the phase angle. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of a car commutator gear shaft.

[0011] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0012] Figure 3 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0013] Figure 4 This is a cross-sectional view of the overall structure in an embodiment of the present invention;

[0014] Figure 5 This is a schematic diagram of the structure when the positioning sleeve is fitted onto the commutator gear shaft of an automobile, as shown in the embodiment.

[0015] The attached figures are labeled as follows:

[0016] 1a – Gear shaft shaft section; 1b – Gear shaft gear section

[0017] 1c—Gear shaft positioning convex ring; 1d—Process section

[0018] 2 – Rear sleeve 3 – Front sleeve 4 – Positioning plate

[0019] 5—Observation gap; 6—First positioning step; 7—Second positioning step. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0021] It should be noted in advance that, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, in this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature include the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0023] like Figure 3-5 As shown, the automotive commutator gear shaft phase angle detection tool includes a positioning sleeve. The positioning sleeve includes a rear sleeve 2 for fitting the gear shaft shaft portion 1a and a front sleeve 3 for fitting the gear shaft gear portion 1b. A positioning plate 4 is fixedly connected to the upper end of the rear end face of the rear sleeve 2. The inner wall surface of the positioning plate 4 can abut against the process cut surface 1d on the gear shaft positioning convex ring 1c. An observation notch 5 is provided at the left and right ends of the front end face of the front sleeve 3. The rear end face of the rear sleeve 2 can abut against the gear shaft positioning convex ring 1c. A first positioning step 6 is also provided on the inner wall surface of the rear sleeve 2. The length of the front sleeve 3 is less than the length of the gear shaft gear portion 1b.

[0024] The operating principle of the automotive commutator gear shaft phase angle detection tool provided in the above embodiment is as follows: A positioning sleeve is fitted over the automotive commutator gear shaft, so that the rear end face of the rear sleeve 2 abuts against the gear shaft positioning convex ring 1c, and simultaneously, the inner wall surface of the positioning plate 4 abuts against the process cut surface 1d. At this time, the positions of the two observation notches 5 are exactly located on the left and right sides of the gear shaft gear portion 1b. Then, by observing whether the observation notches 5 can align with the tooth tips of the gear (e.g., ...), the tool is used to detect the phase angle of the automotive commutator gear shaft. Figure 5 As shown in the figure, it can be determined that the phase angle of the product meets the requirements. In fact, the process section 1d serves as a reference equivalent to the inner wall of the square positioning hole at the rear end of the gear shaft. The line connecting the center point of the inner wall of the positioning plate 4 to the center of the positioning sleeve shaft is perpendicular to the line connecting the center points of the two observation notches 5, forming a 90-degree angle. Therefore, when the inner wall of the positioning plate 4 is in contact with the process section 1d, the position aligned with the observation notch 5 will be the position required for detection. It can be seen that this tool can replace the existing triangular coordinate detection method, thereby significantly improving the detection efficiency and accuracy of the phase angle.

[0025] It should be noted that those skilled in the art should know that the total length of the positioning sleeve (the length of the front sleeve 3 and the rear sleeve 2) can be pre-calculated according to the specifications of the gear shaft to be inspected. It is only necessary to ensure that the position of the observation notch 5 is consistent with the position of the point taken at the corresponding length position on the gear segment in the existing method. In addition, the size of the observation notch 5 can also be set according to the actual tooth thickness of the gear shaft. Those skilled in the art do not face any technical obstacles in setting the above specifications.

[0026] Preferably, the first positioning step 6 is located in the middle of the rear sleeve 2, and the inner wall surface at the front end of the rear sleeve 2 is also provided with a second positioning step 7. Those skilled in the art should know that several steps (or shoulders) are usually provided on the gear shaft 1a. Therefore, by setting the corresponding first positioning step 6 and second positioning step 7 according to the position of these steps, the positioning sleeve can be conveniently installed and the positioning sleeve installed on the gear shaft can be more stable.

[0027] Since the outer diameter of the gear shaft portion 1a of the automotive commutator gear shaft to which the tool of this embodiment is applicable is usually larger than the outer diameter of the gear shaft portion 1b, it is more preferable to set the outer diameter of the rear sleeve portion 2 to be larger than the outer diameter of the front sleeve portion 3, so as to better fit the product to be tested.

[0028] In addition, in this embodiment, the front sleeve 3, the rear sleeve 2 and the positioning plate 4 are integrally formed structures, wherein the outer wall surface of the positioning plate 4 can be an arc-shaped surface with the same curvature as the rear sleeve 2.

[0029] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

[0030] To facilitate understanding by those skilled in the art of the improvements of this invention over the prior art, some of the accompanying drawings and descriptions have been simplified, and for clarity, some other elements have been omitted from this application. Those skilled in the art should realize that these omitted elements may also constitute the content of this invention.

Claims

1. A tool for detecting the phase angle of a commutator gear shaft in an automobile, characterized in that: The system includes a positioning sleeve, which includes a rear sleeve (2) for fitting the shaft portion (1a) of the gear shaft and a front sleeve (3) for fitting the gear portion (1b) of the gear shaft. A positioning plate (4) is fixedly connected to the upper end of the rear end face of the rear sleeve (2). The inner wall of the positioning plate (4) can abut against the process cut surface (1d) on the gear shaft positioning convex ring (1c). An observation notch (5) is provided at the left and right ends of the front end face of the front sleeve (3). The rear end face of the rear sleeve (2) can abut against the gear shaft positioning convex ring (1c). A first positioning step (6) is also provided on the inner wall of the rear sleeve (2). The length of the front sleeve (3) is less than the length of the gear portion (1b) of the gear shaft. The process section (1d) serves as a reference equivalent to the inner wall of the square positioning hole at the rear end of the gear shaft. The line connecting the center point of the inner wall of the positioning plate (4) to the center of the positioning sleeve shaft is perpendicular to the line connecting the center points of the two observation notches (5) and forms a 90-degree angle. When in use, the positioning sleeve is placed on the commutator gear shaft of the car, so that the rear end face of the rear sleeve (2) abuts against the gear shaft positioning convex ring (1c), and at the same time, the inner wall of the positioning plate (4) is attached to the process cut surface (1d). At this time, the positions of the two observation notches (5) are exactly located on the left and right sides of the gear shaft gear part (1b). By checking whether the observation notches (5) can be aligned with the tooth tip of the gear, it can be determined whether the phase angle of the product meets the requirements.

2. The automotive commutator gear shaft phase angle detection tool according to claim 1, characterized in that: The first positioning step (6) is located in the middle of the rear sleeve (2), and the inner wall surface of the front end of the rear sleeve (2) is also provided with a second positioning step (7).

3. The automotive commutator gear shaft phase angle detection tool according to claim 2, characterized in that: The outer diameter of the rear sleeve (2) is greater than the outer diameter of the front sleeve (3).

4. The automotive commutator gear shaft phase angle detection tool according to claim 3, characterized in that: The front sleeve (3), the rear sleeve (2), and the positioning plate (4) are integrally formed.

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