Internal and external size measuring instrument for engine belt wheel

Abstract

The utility model relates to an internal and external dimension measuring instrument for an engine belt wheel, which belongs to the field of engine part production, and comprises a detection frame, the detection frame is located in an annular groove of the belt wheel and is in contact with the groove bottom of the annular groove, the detection frame is provided with a contact point and a detection point, the contact point is provided with an abutting body, and the abutting body is provided with a clamping groove. The detecting point is provided with a detector, the abutting body and the detector are in contact with the inner diameter face or the outer diameter face of the belt wheel at the same time, and the connecting line of the contact point of the abutting body of the contact point and the belt wheel and the connecting line of the contact point of the detector and the belt wheel pass through the axis of the belt wheel. The special measuring structure suitable for the belt wheel shape is used for detecting the sizes of the inner diameter surface and the outer diameter surface, the operation efficiency is high, and the detection result is more accurate.

Description

Technical Field

[0001] The present application relates to the field of engine parts production, and in particular to an instrument for measuring the inner and outer dimensions of an engine pulley. Background Art

[0002] The front gear train of a car engine includes belts and pulleys, such as Figure 1 As shown, an annular groove 11 is coaxially provided on the pulley 1, and the groove wall surface close to the axis of the pulley 1 is called the outer diameter surface, and the groove wall surface away from the axis of the pulley 1 is called the inner diameter surface. The circular diameter dimensional accuracy of the inner diameter surface and the outer diameter surface is one of the inspection indicators for the processing of the pulley 1.

[0003] At present, the dimensional inspection of the inner diameter surface and the outer diameter surface is carried out by conventional measuring tools such as vernier calipers. Conventional measuring tools have high versatility, but for structural parts of specific shapes, the adaptability of conventional measuring tools is relatively low, and it is inconvenient to operate while ensuring accuracy. Utility Model Content

[0004] In order to improve the above problems, the present application provides an instrument for measuring the inner and outer dimensions of an engine pulley.

[0005] The present application provides an engine pulley inner and outer dimension measuring device using the following technical solution:

[0006] A device for measuring the inner and outer dimensions of an engine pulley comprises a detection frame, wherein the detection frame is located in an annular groove of the pulley and contacts the groove bottom of the annular groove, wherein a contact point and a detection point are provided on the detection frame, wherein an abutment body is provided on the contact point, wherein a detector is provided on the detection point, wherein the abutment body and the detector contact the inner diameter surface or the outer diameter surface of the pulley at the same time, and a line connecting the contact point of the abutment body and the pulley and the contact point of the detector and the pulley passes through the axis of the pulley.

[0007] By adopting the above technical solution, the detection frame abuts against the bottom of the annular groove, and the abutment body and the detector thereon respectively contact the inner diameter surface or the outer diameter surface of the pulley, the structural adaptability of the device to the pulley is improved, and at the same time, the relative position stability of the detection frame and the pulley is relatively high, the operation is relatively simple, and the detection accuracy can be guaranteed.

[0008] Preferably, a support point is also provided on the detection frame, and an abutment body is also provided on the support point. The abutment body on the support point contacts the inner diameter surface or the outer diameter surface of the pulley. The abutment body on the support point, the abutment body on the contact point, and the detector are respectively located on the same circle with the contact point of the pulley, and the center of the circle is located on the axis of the pulley.

[0009] By adopting the above technical solution, based on the principle of determining a circle by three points, the aim is to increase the probability that the line connecting the contact point and the detection point successfully passes through the pulley circle, thereby improving the measurement accuracy.

[0010] Preferably, the abutment body and the detector are both detachably connected to the detection frame, and two installation positions are provided on the detection frame at the contact point, the detection point and the support point, and the two installation positions correspond to the inner diameter surface and the outer diameter surface of the pulley respectively.

[0011] By adopting the above technical solution and changing the installation positions of the abutment body and the detector, the same detection frame can take into account the dimensional detection of the inner diameter surface and the outer diameter surface of the same pulley.

[0012] Preferably, the detector is a lever micrometer.

[0013] Preferably, the detection frame includes a frame body and a raising block, the raising block is detachably connected to the frame body, the raising block is located on the side of the frame body facing the bottom of the annular groove and abuts against the bottom of the annular groove, and the contact point and the detection point are both located on the frame body.

[0014] By adopting the above technical scheme, whether the raising block is installed or not and the height of the raising block can change the height of the frame relative to the bottom of the annular groove, thereby changing the height of the detection point, the support point and the contact point, thereby achieving the purpose of measuring the dimensions at different heights of the inner diameter surface and the outer diameter surface.

[0015] Preferably, a positioning groove is provided on the frame, a positioning protrusion is fixedly connected to the raising block, and the positioning protrusion is embedded in the positioning groove.

[0016] By adopting the above technical solution, the pad block and the frame can be quickly positioned relative to each other.

[0017] Preferably, the abutment body is a tungsten steel sheet, which is mounted on the detection frame by bolts, and a sheet surface of the tungsten steel sheet is parallel to the bottom surface of the annular groove.

[0018] Preferably, an auxiliary handle is installed on the detection frame.

[0019] By adopting the above technical solution, it is convenient for the operator to take and place the detection rack.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. Through the setting of the detection frame, the detection frame abuts against the bottom of the annular groove, and the abutment body and the detector thereon contact the inner diameter surface or the outer diameter surface of the pulley respectively, so that the structural adaptability of the device to the pulley is improved, and at the same time, the relative position stability of the detection frame and the pulley is high, the operation is relatively simple, and the detection accuracy can be guaranteed;

[0022] 2. By setting the pad, the height of the frame relative to the annular groove changes, and the detection point and the contact point can touch the inner diameter surface and the outer diameter surface at different heights for detection, thereby improving the comprehensiveness of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram used to reflect the pulley in the background technology of this application.

[0024] Figure 2 It is a structural schematic diagram used to reflect the measurement device detecting the outer diameter surface of the pulley in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the structure used to reflect the measuring instrument detecting the inner diameter surface of the pulley in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the overall structure explosion used to reflect the internal and external dimension measuring instrument of the engine pulley in the embodiment of the present application.

[0027] Explanation of the reference numerals: 1. pulley; 11. annular groove; 2. detection frame; 21. frame body; 211. positioning groove; 22. raising block; 221. positioning protrusion; 23. detection point; 24. contact point; 25. supporting point; 26. abutment body; 27. detector; 28. auxiliary handle; 29. ​​weight-reducing hole. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The present application embodiment discloses an engine pulley inner and outer dimension measuring device, such as Figure 2 As shown, it includes a detection frame 2, which is in a semicircular shape, and its shape corresponds to the shape of the annular groove 11 of the pulley 1, that is, a pulley 1 of a specific size needs to be detected by a detection frame 2 of a specific size.

[0030] like Figure 2 and 3 As shown, the detection frame 2 is provided with a contact point 24, a support point 25 and a detection point 23, wherein the contact point 24 and the detection point 23 are located at the two ends of the detection frame 2, and the support point 25 is located in the middle of the detection frame 2. Abutment bodies 26 are installed on the support point 25 and the contact point 24, and a detector 27 is installed on the detection point 23. Two mounting positions are provided on the detection frame 2 at the contact point 24, the detection point 23 and the support point 25, and the two mounting positions correspond to the inner diameter surface and the outer diameter surface of the pulley 1 respectively. When the abutment body 26 or the detector 27 is installed at the mounting position on the inner ring side, the detection frame 2 can perform dimensional detection on the outer diameter surface, and when it is installed at the mounting position on the outer ring side, the dimensional detection is performed on the inner ring surface.

[0031] like Figure 2 and 3 As shown, the detection frame 2 is placed in the annular groove 11 of the pulley 1 and abuts against the bottom of the annular groove 11. The abutment body 26 is a tungsten steel sheet, which is mounted on the detection frame 2 by bolts, and the sheet surface of the tungsten steel sheet is parallel to the bottom surface of the annular groove 11. The line connecting the abutment body 26 of the contact point 24 and the contact point of the pulley 1 and the contact point of the detector 27 and the pulley 1 passes through the axis of the pulley 1, that is, in the projection along the axial direction of the pulley 1, the abutment body 26 of the contact point 24 and the probe of the detector 27 are located on the same diameter of the pulley 1. The tungsten steel sheet of the contact point 24 and the support point 25 and the probe of the detector 27 simultaneously abut the inner diameter surface or the outer diameter surface of the pulley 1. According to the principle of three points determining a circle, the tungsten steel sheet of the support point 25 abuts against the inner diameter surface or the outer diameter surface, aiming to increase the probability that the line connecting the contact point 24 and the detection point 23 successfully passes through the circle of the pulley 1, thereby improving the measurement accuracy.

[0032] like Figure 2 and 3 As shown, the detector 27 is a lever micrometer, which is also installed on the detection frame 2 by bolts. During the detection, the detection frame 2 needs to be placed in a standard size circular template for calibration, in which case the lever micrometer is zeroed. Then the detection frame 2 is placed in the annular groove 11 of the pulley 1 to be tested, and the inner diameter surface or outer diameter surface is tested. The indication number (including positive and negative) of the lever micrometer is a direct display of the test result.

[0033] like Figure 4 As shown, the detection frame 2 includes a frame body 21 and a pad 22, the detection point 23, the support point 25 and the contact point 24 are all located on the frame body 21, and the pad 22 is selectively detachably connected to the frame body 21. When the two are connected, the pad 22 is located on the side of the frame body 21 facing the bottom of the annular groove 11 and abuts against the bottom of the annular groove 11, that is, whether the pad 22 is installed or not and the height of the pad 22 can change the height of the frame body 21 relative to the bottom of the annular groove 11, thereby changing the height of the detection point 23, the support point 25 and the contact point 24, thereby achieving the purpose of measuring the dimensions at different heights of the inner diameter surface and the outer diameter surface. A positioning groove 211 is provided on the frame 21, and a positioning protrusion 221 is fixedly connected to the pad block 22. The positioning protrusion 221 is embedded in the positioning groove 211, and then bolts are penetrated from top to bottom on the frame 21, and the bolts are screwed into the positioning protrusion 221 of the pad block 22, so that the pad block 22 and the frame 21 are connected and fixed.

[0034] like Figure 4 As shown, a weight-reducing hole 29 is provided on the frame body 21 to reduce the weight of the detection frame 2 for easy carrying; at the same time, an auxiliary handle 28 is selectively installed and fixed on the detection frame 2 by bolts to facilitate the taking and placement of the detection frame 2.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An instrument for measuring the inner and outer dimensions of an engine pulley, characterized in that: The invention comprises a detection frame (2), wherein the detection frame (2) is located in an annular groove (11) of a pulley (1) and contacts the groove bottom of the annular groove (11), the detection frame (2) is provided with a contact point (24) and a detection point (23), the contact point (24) is provided with an abutment body (26), the detection point (23) is provided with a detector (27), the abutment body (26) and the detector (27) contact the inner diameter surface or the outer diameter surface of the pulley (1) at the same time, and the connecting line between the contact point of the abutment body (26) of the contact point (24) and the pulley (1) and the contact point of the detector (27) and the pulley (1) passes through the axis of the pulley (1).

2. The internal and external dimension measuring device of an engine pulley (1) according to claim 1, characterized in that: The detection frame (2) is also provided with a support point (25), and the support point (25) is also provided with an abutment body (26). The abutment body (26) on the support point (25) contacts the inner diameter surface or the outer diameter surface of the pulley (1). The abutment body (26) on the support point (25), the abutment body (26) on the contact point (24), and the detector (27) are respectively located on the same circle as the contact point (24) of the pulley (1), and the center of the circle is located on the axis of the pulley (1).

3. The internal and external dimension measuring device of an engine pulley (1) according to claim 2, characterized in that: The abutment body (26) and the detector (27) are both detachably connected to the detection frame (2); the detection frame (2) is provided with two installation positions at the contact point (24), the detection point (23) and the support point (25); the two installation positions correspond to the inner diameter surface and the outer diameter surface of the pulley (1), respectively.

4. An instrument for measuring the inner and outer dimensions of an engine pulley (1) according to any one of claims 1 to 3, characterized in that: The detector (27) is a lever micrometer.

5. An instrument for measuring the inner and outer dimensions of an engine pulley (1) according to any one of claims 1 to 3, characterized in that: The detection frame (2) comprises a frame body (21) and a padding block (22), wherein the padding block (22) is detachably connected to the frame body (21), the padding block (22) is located on a side of the frame body (21) facing the bottom of the annular groove (11) and abuts against the bottom of the annular groove (11), and the contact point (24) and the detection point (23) are both located on the frame body (21).

6. The internal and external dimension measuring device of an engine pulley (1) according to claim 5, characterized in that: The frame (21) is provided with a positioning groove (211), and the padding block (22) is fixedly connected with a positioning protrusion (221), and the positioning protrusion (221) is embedded in the positioning groove (211).

7. An instrument for measuring the inner and outer dimensions of an engine pulley (1) according to any one of claims 1 to 3, characterized in that: The abutment body (26) is a tungsten steel sheet, which is mounted on the detection frame (2) by means of bolts, and a sheet surface of the tungsten steel sheet is parallel to a groove bottom surface of the annular groove (11).

8. An instrument for measuring the inner and outer dimensions of an engine pulley (1) according to any one of claims 1 to 3, characterized in that: An auxiliary handle (28) is installed on the detection frame (2).

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