A measuring tool and method for the tip point of the outer contour of a front bearing seat of a pinion

Abstract

The present application relates to the field of test and test technology, especially to a kind of intermediate gear front bearing seat contour sharp point measuring tool and detection method, measuring tool includes three legs, three legs upper portion is equipped with base jointly;Center of base is provided with reference hole, reference hole is provided with pin hole beside;Rhombus pin is inserted in pin hole;The reference hole is used to cooperate with the outer circumferential surface of the tubular body of intermediate gear front bearing seat;Rhombus pin is used to cooperate with the positioning hole on intermediate gear front bearing seat;Sample plate installation groove is opened on the top surface of the base, and sample plate installation groove is located at the left side position of rhombus pin;Detection sample plate is installed in sample plate installation groove, first measuring surface is provided on the detection sample plate, second measuring surface is provided on the right side wall of sample plate installation groove;First measuring surface and second measuring surface are arranged at intervals and form detection gap.

Description

Technical Field

[0001] This invention relates to the field of testing and measurement technology, and in particular to a measuring tool and testing method for the apex of the outer profile of the front bearing housing of an intermediate gear. Background Technology

[0002] Combination Figure 1 and Figure 2 As shown, the intermediate gear front bearing housing 100 includes a tubular body 101 and a flange plate 102 disposed at the top of the tubular body 101; an outer profile apex 103 is provided on the outer peripheral surface of the flange plate 102, and a positioning hole 104 is provided on the flange plate 102. The axis of the tubular body 101 and the axis of the positioning hole 104 together form a reference plane A, and the vertical distance from the outer profile apex 103 to the reference plane A is required to be L.

[0003] During operation, the intermediate gear front bearing housing 100 primarily supports the intermediate gear front shaft. Its precise dimensions ensure proper meshing of the intermediate gear with other transmission components. If the dimensions of the outer apex 103 do not meet requirements, it may lead to misalignment of the intermediate gear's installation position, affecting the tooth flank clearance and contact ratio between gears. Good contact ratio is crucial for smooth power transmission; otherwise, it will cause fluctuations and vibrations in power transmission, thus affecting the entire engine assembly process.

[0004] For the inspection of the outer profile apex dimension of the front bearing housing 100 of the intermediate gear, traditional non-fixed caliper measuring tools and coordinate measuring machines can be used for measurement in most cases.

[0005] Non-fixed chuck gauges consist of a chuck and a slider. The chuck is typically manufactured according to standard dimensions and shapes, primarily to ensure that the workpiece's dimensions and shape meet design requirements. However, this type of chuck gauge has the following problems: First, the inspection process of this type of non-fixed gauge is highly dependent on manual operation, which can easily lead to error accumulation, calibration difficulties, and instability during repeated inspections. Second, measurement errors can also be introduced due to differences in equipment or measuring personnel. Third, to achieve high precision, this type of non-fixed chuck often requires precision machining and multiple inspections. This further necessitates the use of precision equipment during manufacturing to ensure the accuracy of the chuck dimensions, and the tolerance requirements for the chuck are often extremely strict, even reaching the micron or sub-micron level. All these requirements make on-site machining and inspection work very complex and difficult.

[0006] Coordinate measuring machine (CMM) equipment has the advantages of high measurement accuracy and strong data processing capabilities. However, it is complex to operate and has high equipment costs. If CMM is used, it will consume a lot of resources in terms of equipment and manpower.

[0007] With the mass production of engines, the efficiency of their testing has severely hampered the delivery of product parts. Therefore, it is urgent to improve the existing measurement methods or design new measurement tools. Summary of the Invention

[0008] The main objective of this invention is to provide a measuring tool and detection method for the apex of the outer contour of the front bearing housing of an intermediate gear, in order to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, on the one hand, the present invention proposes a measuring tool for the outer apex of the front bearing housing of an intermediate gear, comprising three legs, with a base mounted on the upper part of the three legs; a reference hole is provided at the center of the base, and a pin hole is provided next to the reference hole; a diamond-shaped pin is inserted into the pin hole; the reference hole is used to mate with the outer peripheral surface of the tubular body of the front bearing housing of the intermediate gear; the diamond-shaped pin is used to mate with a positioning hole on the front bearing housing of the intermediate gear; a template mounting groove is provided on the top surface of the base, and the template mounting groove is located to the left of the diamond-shaped pin; a test template is installed in the template mounting groove, a first measuring surface is provided on the test template, and a second measuring surface is provided on the right side wall of the template mounting groove; the first measuring surface and the second measuring surface are spaced apart to form a test gap.

[0010] Preferably, the right side of the test template is a stepped surface, which includes a vertical surface, a first inclined surface and a first measuring surface from bottom to top; the right side wall of the template mounting groove includes a second inclined surface and a second measuring surface from bottom to top; a light-transmitting hole is provided at the bottom of the template mounting groove, and the top of the light-transmitting hole is directly opposite the test gap.

[0011] Preferably, the angle between the first inclined surface and the top surface of the test sample is 30 degrees; the angle between the second inclined surface and the vertical direction is 30 degrees.

[0012] Preferably, the intermediate gear front bearing housing includes a tubular body and a flange plate disposed at the top of the tubular body; an outer contour apex is provided on the outer peripheral surface of the flange plate; the positioning hole is disposed on the flange plate; the axis of the tubular body 101 and the axis of the positioning hole 104 together form a reference plane A, and the vertical distance from the outer contour apex to the reference plane A is L; the plane containing the axis of the reference hole and the axis of the pin hole is the measuring reference plane B; the distance between the first measuring surface and the measuring reference plane B is M; the distance between the second measuring surface and the measuring reference plane B is N; satisfying: ; .

[0013] Preferably, the top surface of the test sample is flush with the top surface of the base.

[0014] Preferably, the test template is installed in the template mounting slot using two cylindrical pins and one hexagonal head screw.

[0015] Preferably, three threaded holes are evenly distributed on the base, the upper part of the support leg is configured as a threaded rod, the upper threaded rod of the support leg is screwed into the threaded hole of the base, and a locking nut is screwed into the upper part of the threaded rod, the locking nut is pressed against the top surface of the base.

[0016] Preferably, the perpendicularity of the reference hole and pin hole to the top surface of the base is φ0.01mm.

[0017] On the other hand, the present invention also proposes a method for detecting the apex of the outer profile of the front bearing housing of an intermediate gear, using the above-mentioned measuring instrument, and including the following steps:

[0018] S1. Place the measuring instrument on a horizontal testing platform;

[0019] S2. Install the intermediate gear front bearing housing to be tested on the measuring tool, so that the tubular body of the intermediate gear front bearing housing is inserted into the reference hole of the base, the flange plate of the intermediate gear front bearing housing rests on the top surface of the base, and the diamond pin is inserted into the positioning hole of the intermediate gear front bearing housing.

[0020] S3. Observe whether the outer tip of the intermediate gear front bearing housing is within the inspection gap; if the outer tip is within the inspection gap, the intermediate gear front bearing housing is deemed qualified; if the outer tip is not within the inspection gap, the intermediate gear front bearing housing is deemed unqualified.

[0021] Preferably, in step S3, when observing, the gaze should be directed vertically downwards; a light source is placed below the base, and the light emitted by the light source shines upwards onto the detection gap through the light-transmitting hole on the base.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] (1) By utilizing the measuring tool and testing method provided by this invention, the outer contour apex of the intermediate gear front bearing housing can be quickly tested. During testing, it is only necessary to install the intermediate gear front bearing housing to be tested on the measuring tool, so that the tubular body of the intermediate gear front bearing housing is inserted into the reference hole of the base, the flange plate of the intermediate gear front bearing housing rests on the top surface of the base, and the diamond pin is inserted into the positioning hole of the intermediate gear front bearing housing. By observing whether the outer contour apex of the intermediate gear front bearing housing is within the testing gap, it can be determined whether the size of the outer contour apex is qualified. The operation is simple and the testing efficiency is high.

[0024] (2) In this invention, a light-transmitting hole is provided at the bottom of the template mounting groove, and the top of the light-transmitting hole is directly facing the detection gap. During the detection, a light-emitting light source is set below the base. The light emitted by the light source shines upward on the detection gap through the light-transmitting hole on the base, so as to observe whether the outer contour tip is inside the detection gap.

[0025] (3) In the mass production and quality control of workpieces, the measuring tools and testing methods provided by the present invention have the significant advantages of rapid and batch verification of whether workpieces are qualified, which can effectively improve production and quality inspection efficiency and ensure the overall quality of products.

[0026] (4) By using the measuring instruments and testing methods provided by the present invention, operators can make intuitive size comparisons through visual observation, reducing the difficulty of use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a top view of the front bearing housing of the intermediate gear;

[0029] Figure 2 This is a schematic diagram of the structure of the measuring instrument provided by the present invention when it is fitted with the front bearing housing of the intermediate gear;

[0030] Figure 3 This is a top view of the measuring instrument provided by the present invention;

[0031] Figure 4 for Figure 3 Sectional view of AA;

[0032] Figure 5 This is a three-dimensional structural diagram of the base in this invention;

[0033] Figure 6 This is a top view of the base in this invention;

[0034] Figure 7 for Figure 6 DD section view;

[0035] Figure 8 for Figure 6 EE section view;

[0036] Figure 9 This is a three-dimensional structural diagram of the test sample in this invention;

[0037] Figure 10 for Figure 9 View from direction A.

[0038] Explanation of reference numerals: 1. Base; 1a. Reference hole; 1b. Template mounting slot; 1c. Second measuring surface; 1d. Pin hole; 1e. Second inclined surface; 1f. Light-transmitting hole; 1g. Threaded hole; 2. Inspection template; 2a. First measuring surface; 2b. Vertical surface; 2c. First inclined surface; 3. Diamond pin; 4. Cylindrical pin; 5. Locking nut; 6. Socket head cap screw; 7. Support leg; 7a. Threaded rod; 8. Inspection gap; 100. Intermediate gear front bearing seat; 101. Tubular body; 102. Flange plate; 103. Outer contour apex; 104. Positioning hole. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0042] Combination Figure 1 and Figure 2As shown, the intermediate gear front bearing housing 100 includes a tubular body 101 and a flange plate 102 disposed at the top of the tubular body 101. An outer profile apex 103 is provided on the outer circumferential surface of the flange plate 102, and a positioning hole 104 is provided on the flange plate 102. The axis of the tubular body 101 and the axis of the positioning hole 104 together form a reference plane A. The vertical distance from the outer profile apex 103 to the reference plane A is required to be L. Specifically, L = 10 ± 0.18 mm is required.

[0043] Combination Figures 2 to 10 As shown, in one aspect, the present invention provides a measuring tool for the outer apex of the front bearing housing of an intermediate gear, comprising three legs 7, on the upper part of the three legs 7, a base 1 is mounted together; a reference hole 1a is provided at the center of the base 1, and a pin hole 1d is provided next to the reference hole 1a; a diamond pin 3 is inserted into the pin hole 1d; the reference hole 1a is used to mate with the outer peripheral surface of the tubular body 101 of the front bearing housing of the intermediate gear 100; the diamond pin 3 is used to mate with the positioning hole 104 on the front bearing housing of the intermediate gear 100; a template mounting groove 1b is provided on the top surface of the base 1, and the template mounting groove 1b is located to the left of the diamond pin 3; a test template 2 is installed in the template mounting groove 1b, a first measuring surface 2a is provided on the test template 2, and a second measuring surface 1c is provided on the right side wall of the template mounting groove 1b; the first measuring surface 2a and the second measuring surface 1c are spaced apart and form a test gap 8.

[0044] Combination Figure 9 and Figure 10 As shown, the right side of the test template 2 is a stepped surface, comprising a vertical surface 2b, a first inclined surface 2c, and a first measuring surface 2a from bottom to top; the right side wall of the template mounting groove 1b comprises a second inclined surface 1e and a second measuring surface 1c from bottom to top; a light-transmitting hole 1f is provided at the bottom of the template mounting groove 1b, and the top of the light-transmitting hole 1f faces the test gap 8. Specifically, the angle between the first inclined surface 2c and the top surface of the test template 2 is 30 degrees; the angle between the second inclined surface 1e and the vertical direction is 30 degrees.

[0045] Combination Figure 3 As shown, the plane containing the axis of the reference hole 1a and the axis of the pin hole 1d is the gauge reference plane B; the distance between the first measuring surface 2a and the gauge reference plane B is M; the distance between the second measuring surface 1c and the gauge reference plane B is N; satisfying: ; Specifically, the distance M between the first measuring surface 2a and the reference surface B of the measuring instrument is 10.162 ± 0.018 mm. 10.18mm; the distance N between the second measuring surface 1c and the reference surface B of the measuring instrument is 9.838±0.018mm. =9.82mm, which satisfies: ; By limiting the dimensions as described above, it can be ensured that the width range of the detection gap 8 meets the detection requirements of the outer contour tip 103.

[0046] In this embodiment, the top surface of the test sample 2 is required to be flush with the top surface of the base 1. This ensures that the flange plate 102 of the intermediate gear front bearing housing 100 fits snugly against the top surface of the base 1.

[0047] Combination Figure 3 As shown, the test template 2 is mounted in the template mounting slot 1b using two cylindrical pins 4 and one hexagon head screw 6. The two cylindrical pins 4 restrict the two degrees of freedom of movement and one degree of freedom of rotation of the test template 2 within the template mounting slot 1b, while the hexagon head screw 6 provides additional fixation. This fixing method securely fixes the test template 2, thereby accurately determining its position on the base 1. It ensures that the relative position of the test template 2 and the workpiece remains stable during measurement, effectively reducing measurement errors caused by movement of the workpiece and the test template 2, and improving the consistency of repeatable measurements.

[0048] Combination Figure 2 and Figure 5 As shown, three threaded holes 1g are evenly distributed on the base 1. The upper part of the support leg 7 is configured as a threaded rod 7a. The threaded rod 7a on the upper part of the support leg 7 is screwed into the threaded hole 1g of the base 1, and a locking nut 5 is screwed onto the upper part of the threaded rod 7a. The locking nut 5 is pressed against the top surface of the base 1.

[0049] In this embodiment, in order to ensure the accuracy of the reference surface B of the measuring tool, the perpendicularity of the reference hole 1a and the pin hole 1d relative to the top surface of the base 1 is required to be φ0.01mm.

[0050] On the other hand, this embodiment also provides a method for detecting the apex of the outer profile of the front bearing housing of an intermediate gear, using the above-mentioned measuring tool, including the following steps:

[0051] S1. Place the measuring instrument on a horizontal testing platform;

[0052] S2. Install the intermediate gear front bearing housing 100 to be tested on the measuring tool, so that the tubular body 101 of the intermediate gear front bearing housing 100 is inserted into the reference hole 1a of the base 1, the flange plate 102 of the intermediate gear front bearing housing 100 rests on the top surface of the base 1, and the diamond pin 3 is inserted into the positioning hole 104 of the intermediate gear front bearing housing 100.

[0053] S3. Observe whether the outer tip 103 of the intermediate gear front bearing housing 100 is within the inspection gap 8; if the outer tip 103 is within the inspection gap 8, the intermediate gear front bearing housing 100 is deemed qualified; if the outer tip 103 is not within the inspection gap 8, the intermediate gear front bearing housing 100 is deemed unqualified. Furthermore, during observation, the gaze should be directed vertically downwards; a light source is placed below the base 1, and the light emitted by the light source shines upwards onto the inspection gap 8 through the light-transmitting hole 1f on the base 1.

[0054] In this embodiment, the base 1 is supported by three legs 7. During testing, after the intermediate gear front bearing housing 100 to be tested is installed on the base 1, the lower end of the tubular body 101 must not touch the testing table surface. When it is necessary to remove the intermediate gear front bearing housing 100 from the base 1, the operator can lift the entire workpiece upwards from the lower end of the tubular body 101. Therefore, this measuring tool can easily and conveniently pick up and place the intermediate gear front bearing housing 100, thereby effectively improving the convenience of operation and work efficiency.

[0055] In this embodiment, by using the reference hole 1a to cooperate with the tubular body 101 on the intermediate gear front bearing seat 100, and by using the diamond pin 3 to cooperate with the positioning hole 104 of the intermediate gear front bearing seat 100, the intermediate gear front bearing seat 100 to be tested is positioned, so that the reference surface A on the part coincides with the reference surface B of the measuring tool, thus ensuring the accuracy and reliability of subsequent testing.

[0056] In this embodiment, a second inclined surface 1e at a 30-degree angle is provided on the right side of the template mounting groove 1b, and a light-transmitting hole 1f with a diameter of φ10mm is opened at the bottom of the template mounting groove 1b. A first inclined surface 2c at a 30-degree angle is provided on the right side of the test template 2. The purpose of this design is to form a wide light-transmitting area between the first inclined surface 2c and the second inclined surface 1e. The light passing through the light-transmitting hole 1f falls within the space between the first inclined surface 2c and the second inclined surface 1e, allowing the operator to clearly observe the outer contour tip 103 of the intermediate gear front bearing seat 100 during the measurement process. Therefore, the provision of the second inclined surface 1e and the first inclined surface 2c ensures that the measuring instrument has good light transmittance.

[0057] In this embodiment, when creating the template mounting slot 1b on the base 1, it is necessary to ensure that the distance N between the second measuring surface 1c and the measuring reference surface B is 9.838±0.018mm. When assembling the test template 2, it is necessary to ensure that the distance M between the first measuring surface 2a and the measuring reference surface B is 10.162±0.018mm.

[0058] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A measuring tool for the apex of the outer contour of the front bearing housing of an intermediate gear, characterized in that, It includes three legs (7), and a base (1) is installed on the upper part of the three legs (7). A reference hole (1a) is provided at the center of the base (1), and a pin hole (1d) is provided next to the reference hole (1a); a diamond pin (3) is inserted into the pin hole (1d); the reference hole (1a) is used to mate with the outer circumferential surface of the tubular body (101) of the intermediate gear front bearing housing (100); the diamond pin (3) is used to mate with the positioning hole (104) on the intermediate gear front bearing housing (100); A template mounting groove (1b) is provided on the top surface of the base (1), and the template mounting groove (1b) is located on the left side of the diamond pin (3); A test template (2) is installed in the template mounting slot (1b), a first measuring surface (2a) is provided on the test template (2), and a second measuring surface (1c) is provided on the right side wall of the template mounting slot (1b). The first measuring surface (2a) and the second measuring surface (1c) are spaced apart and form a detection gap (8); The right side of the test sample (2) is a stepped surface, which includes a vertical surface (2b), a first inclined surface (2c) and a first measuring surface (2a) from bottom to top. The right side wall of the template mounting groove (1b) includes a second inclined surface (1e) and a second measuring surface (1c) from bottom to top. A light-transmitting hole (1f) is provided at the bottom of the template mounting groove (1b), and the top of the light-transmitting hole (1f) is directly opposite the detection gap (8). The angle between the first inclined surface (2c) and the top surface of the test sample (2) is 30 degrees; the angle between the second inclined surface (1e) and the vertical direction is 30 degrees. The intermediate gear front bearing housing (100) includes a tubular body (101) and a flange plate (102) disposed at the top of the tubular body (101); an outer profile apex (103) is provided on the outer peripheral surface of the flange plate (102); the positioning hole (104) is disposed on the flange plate (102); the axis of the tubular body (101) and the axis of the positioning hole (104) together form a reference plane A, and the vertical distance from the outer profile apex (103) to the reference plane A is L; The plane containing the axis of the reference hole (1a) and the axis of the pin hole (1d) is the reference plane B of the measuring instrument; The distance between the first measuring surface (2a) and the reference surface B of the measuring instrument is M; The distance between the second measuring surface (1c) and the reference surface B of the measuring instrument is N; satisfy: ; .

2. The measuring instrument as described in claim 1, characterized in that: The top surface of the test sample (2) is flush with the top surface of the base (1).

3. The measuring instrument as described in claim 1, characterized in that: The test template (2) is installed in the template mounting slot (1b) by two cylindrical pins (4) and a hexagonal head screw (6).

4. The measuring instrument as described in claim 1, characterized in that: Three threaded holes (1g) are evenly distributed on the base (1). The upper part of the support (7) is configured as a threaded rod (7a). The threaded rod (7a) on the upper part of the support (7) is screwed into the threaded hole (1g) of the base (1), and a locking nut (5) is screwed onto the upper part of the threaded rod (7a). The locking nut (5) is pressed against the top surface of the base (1).

5. The measuring instrument as described in claim 1, characterized in that: The perpendicularity of the reference hole (1a) and pin hole (1d) to the top surface of the base (1) is: 0.01mm.

6. A method for detecting the apex of the outer profile of the front bearing housing of an intermediate gear, characterized in that, The measuring instrument according to any one of claims 1 to 5 comprises the following steps: S1. Place the measuring instrument on a horizontal testing platform; S2. Install the intermediate gear front bearing housing (100) to be tested on the measuring tool, so that the tubular body (101) of the intermediate gear front bearing housing (100) is inserted into the reference hole (1a) of the base (1), the flange plate (102) of the intermediate gear front bearing housing (100) rests on the top surface of the base (1), and the diamond pin (3) is inserted into the positioning hole (104) of the intermediate gear front bearing housing (100). S3. Observe whether the outer tip (103) of the intermediate gear front bearing housing (100) is within the inspection gap (8); if the outer tip (103) is within the inspection gap (8), the intermediate gear front bearing housing (100) is qualified; if the outer tip (103) is not within the inspection gap (8), the intermediate gear front bearing housing (100) is unqualified.

7. The detection method as described in claim 6, characterized in that, In step S3, when observing, the gaze should be directed vertically downwards. A light source is set below the base (1), and the light emitted by the light source shines upward onto the detection gap (8) through the light-transmitting hole (1f) on the base (1).

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