Shaft attaching ring groove depth testing fixture

Abstract

The utility model discloses a tool for detecting the depth of a ring groove attached to a shaft. The tool comprises a supporting block, an indicating measuring tool, an extended measuring rod and a check gauge. A stepped hole with the axis in the vertical direction is formed in the supporting block, the check gauge is arranged on the lower side of the supporting block, and a check platform is arranged at the position, corresponding to the stepped hole, of the check gauge. The stepped hole is formed in the side, close to the front end face, of the supporting block, and a shaft body avoiding groove is formed in the front end face of the supporting block. The indication measuring tool is detachably connected with the supporting block, the lower portion of the indication measuring tool extends into the stepped hole, the lower portion of the indication measuring tool is connected with the upper portion of the extension measuring rod, the extension measuring rod penetrates through and downwards extends out of the stepped hole, and the lower end of the extension measuring rod can abut against the calibration platform. According to the utility model, the measurement difficulty and the measurement inaccuracy caused by the limited space near the shaft body can be prevented, so that the measurement of the shaft-attached ring groove is simpler, more convenient and more accurate.

Description

Technical Field

[0001] The utility model relates to a parts inspection tool, in particular to a shaft ring groove depth inspection tool. Background Art

[0002] like Figure 8 As shown, the body 6 of the housing of the ship engine fuel injection pump includes a base 61 and a shaft body 62 protruding upward from the base 61, and two annular grooves are arranged at the connection between the shaft body 62 and the base 61. The annular groove close to the outer circle of the shaft body 62 is the shaft-contacting annular groove 63. When inspecting the shaft-contacting annular groove 63, due to the narrow width of the shaft-contacting annular groove 63 and the depth dimension tolerance requirement of the shaft-contacting annular groove 63 as high as 0.01mm, during the inspection process using ordinary inspection tools such as depth vernier calipers and depth micrometers, there are problems such as interference between ordinary inspection tools and the outer circle of the shaft body, difficulty in inserting ordinary inspection tools into the shaft-contacting annular groove 63, and insufficient inspection accuracy, resulting in difficult, inconvenient and inaccurate measurement. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a shaft ring groove depth gauge, which can prevent measurement difficulties and inaccurate measurements due to limited space near the shaft body, thereby making the measurement of the shaft ring groove simpler, more convenient and accurate.

[0004] A shaft ring groove depth gauge in the utility model comprises a support block, an indicating gauge, an extended measuring rod and a calibration gauge; a stepped hole with an axis in the up-down direction is arranged inside the support block, the calibration gauge is arranged on the lower side of the support block, and a calibration platform is arranged on the calibration gauge corresponding to the position of the stepped hole; the stepped hole is arranged on the side close to the front end face of the support block, and an axle body avoidance groove is arranged on the front end face of the support block; the indicating gauge is connected to the support block in a detachable manner, the lower part of the indicating gauge extends into the stepped hole, the lower part of the indicating gauge is connected to the upper part of the extended measuring rod, the extended measuring rod passes through and extends downward from the stepped hole, and the lower end of the extended measuring rod can abut against the calibration platform.

[0005] Furthermore, the stepped hole comprises an upper hole section, a middle hole section and a lower hole section which are arranged in sequence from top to bottom, and the radius of the upper hole section, the radius of the middle hole section and the radius of the lower hole section decrease in sequence.

[0006] Furthermore, the front end surface of the support block protrudes forward at a position corresponding to the upper hole section to form a boss structure, and the shaft avoidance groove is located at the lower side of the boss structure.

[0007] Furthermore, a distance D between the bottom wall of the shaft avoidance groove and the center axis of the stepped hole is smaller than a radius R of the upper hole section.

[0008] Furthermore, the indicating measuring tool includes a dial, a mounting rod and a body measuring rod, the mounting rod is connected to the dial, the upper part of the body measuring rod extends into the mounting rod, and the extended measuring rod is connected to the body measuring rod.

[0009] Furthermore, the mounting rod is clearance-matched with the upper hole section, the meter body measuring rod is clearance-matched with the middle hole section, and the extended measuring rod is clearance-matched with the lower hole section.

[0010] Furthermore, the extended measuring rod includes a connecting portion, a main rod portion and a ball head portion which are arranged in sequence from top to bottom, the connecting portion is connected to the meter body measuring rod, and the main rod portion is provided with knurling.

[0011] Furthermore, it also includes a positioning piece; a positioning hole with an axis along the front-to-back direction is also provided inside the support block, the positioning hole is connected to the upper hole section, the positioning piece is threadedly connected to the positioning hole, and the position of the indicating measuring tool can be locked or unlocked by tightening or loosening the positioning piece.

[0012] Furthermore, a proofreading groove is provided on the proofreading rule, and the proofreading platform is located in the proofreading groove; the upper end surface of the proofreading rule and the upper end surface of the proofreading platform are both planes, and the distance between the two planes is L.

[0013] Furthermore, rough-machined grooves are provided on the left and right sides of the proofreading platform.

[0014] The beneficial effects of the utility model are:

[0015] (1) The utility model provides a shaft avoidance groove to give way to the shaft, thereby preventing the extended measuring rod from being inserted into the shaft ring groove due to the interference between the outer circle of the shaft and the support block. At the same time, the additional extended measuring rod can ensure that a large distance can be maintained between the indicating measuring tool and the shaft ring groove, so that the indicating measuring tool can be extended upward from the shaft, which is convenient for observation and reading, and ensures that the scale can be directly facing and level when reading, thereby preventing inaccurate readings due to squinting at the indicating measuring tool. By giving way to the shaft avoidance groove and increasing the insertion length of the extended measuring shaft, it is possible to prevent measurement difficulties and inaccurate measurements due to limited space near the shaft, thereby making the measurement of the shaft ring groove simpler, more convenient and more accurate.

[0016] (2) The calibration gauge of the utility model can be used to check the zero value before measurement to ensure the accuracy of the measured value;

[0017] (3) The utility model arranges the boss structure that cannot avoid interference above the shaft body by making the distance between the bottom wall of the shaft body avoidance groove and the center axis of the stepped hole smaller than the radius of the upper hole section, and arranges the bottom of the boss structure into a structure with a small hole diameter and a small wall thickness to form the shaft body avoidance groove, thereby preventing the bottom wall of the shaft body avoidance groove from contacting the outer circle of the shaft body when measuring the groove depth;

[0018] (4) The utility model makes a special design for the structure of the extended measuring rod, so that the knurling on the main rod can increase the friction force, which is convenient for rotating and applying force when disassembling the extended measuring rod; the main rod can greatly increase the measurable length, ensuring that a large distance can be maintained between the indicating gauge and the shaft ring groove, so that the indicating gauge can extend upward from the shaft body, which is convenient for observation and reading, and ensures that the scale can be directly facing and level when reading, preventing inaccurate readings caused by squinting at the indicating gauge; when measuring and the gauge is zeroed, the ball head contacts the groove to be measured or the calibration platform at a point, making the measurement more accurate;

[0019] (5) The utility model can reduce the area of ​​fine machining by arranging rough machining grooves on the left and right sides of the proofreading platform, and can reduce the machining difficulty at the corners of the proofreading grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the support block of the utility model;

[0023] Figure 3 for Figure 2 AA cross-section diagram of ;

[0024] Figure 4 It is a structural schematic diagram of the extended measuring rod of the utility model;

[0025] Figure 5 A schematic diagram of the connection structure of the indicating measuring tool and the extended measuring rod of the utility model after the probe of the micrometer is disassembled and assembled;

[0026] Figure 6 It is a structural schematic diagram of the proofreading gauge of the utility model;

[0027] Figure 7 It is a top view schematic diagram of the proofreading gauge of the utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the central part of the housing of a fuel injection pump for a ship engine.

[0029] The following are marked in the accompanying drawings:

[0030] 1-support block, 11-step hole, 111-upper hole section, 112-middle hole section, 113-lower hole section, 12-shaft avoidance groove, 13-boss structure, 14-positioning hole;

[0031] 2- indicating gauge, 21- dial, 22- mounting rod, 23- meter body measuring rod;

[0032] 3-extended measuring rod, 31-connecting part, 32-main rod part, 321-knurling, 33-ball head;

[0033] 4- proofreading gauge, 41- proofreading platform, 42- proofreading groove, 43- rough machining groove;

[0034] 5- positioning piece;

[0035] 6-middle part of the housing of the fuel injection pump of the marine engine, 61-base, 62-shaft body, 63-shaft ring groove. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 1-Figure 8As shown, a shaft ring groove depth gauge in this embodiment includes a support block 1, an indicating gauge 2, an extended measuring rod 3 and a calibration gauge 4; a stepped hole 11 with an axis along the up-down direction is provided inside the support block 1, the calibration gauge 4 is provided on the lower side of the support block 1, and a calibration platform 41 is provided at the position of the calibration gauge 4 corresponding to the stepped hole 11; the stepped hole 11 is provided on the side close to the front end face of the support block 1, and an axle body avoidance groove 12 is provided on the front end face of the support block 1; the indicating gauge 2 is connected to the support block 1 in a detachable manner, the lower part of the indicating gauge 2 extends into the stepped hole 11, the lower part of the indicating gauge 2 is connected to the upper part of the extended measuring rod 3, the extended measuring rod 3 passes through and extends downward from the stepped hole 11, and the lower end of the extended measuring rod 3 can rest on the calibration platform 41. The body 6 of the housing of the fuel injection pump of the ship engine includes a base 61 and a shaft 62 protruding upward from the base 61, and two annular grooves are arranged at the connection between the shaft 62 and the base 61. When the annular groove close to the outer circle of the shaft 62 is detected, the annular groove close to the outer circle of the shaft 62 is the shaft-contacting annular groove 63, the lower end surface of the support block 1 abuts against the upper end surface of the base 61, and the shaft avoidance groove 12 faces the outer circle of the shaft 62. By setting the shaft avoidance groove 12 to make way for the shaft 62, it can be prevented that the extension of the measuring rod 3 is inserted into the shaft due to the interference between the outer circle of the shaft 62 and the support block 1. The ring groove 63, and the additional extended measuring rod 3 can ensure that the indicating gauge 2 and the shaft ring groove 63 can maintain a large distance, so that the indicating gauge 2 can extend upward from the shaft body 62, which is convenient for observation and reading, and ensures that the scale can be directly facing and level when reading, and prevents inaccurate readings caused by squinting the indicating gauge 2; by giving way to the shaft avoidance groove 12 and extending the extended length of the measuring shaft, it can prevent measurement difficulties and inaccurate measurements caused by limited space near the shaft body 62, thereby making the measurement of the shaft ring groove 63 simpler, more convenient and more accurate. The calibration rule 4 can be used to zero the inspection tool before measurement to ensure the accuracy of the measured value.

[0038] In this embodiment, the stepped hole 11 includes an upper hole section 111, a middle hole section 112 and a lower hole section 113 arranged in sequence from top to bottom, and the radius of the upper hole section 111, the radius of the middle hole section 112 and the radius of the lower hole section 113 decrease in sequence. The stepped hole 11 is used to install the indicating gauge 2 and allow the extended measuring rod 3 to pass through. Specifically, in this embodiment, the indicating gauge 2 includes a dial 21, a mounting rod 22 and a body measuring rod 23, the mounting rod 22 is connected to the dial 21, the upper part of the body measuring rod 23 extends into the mounting rod 22, and the extended measuring rod 3 is connected to the body measuring rod 23; in this embodiment, the mounting rod 22 is clearance-matched with the upper hole section 111, the body measuring rod 23 is clearance-matched with the middle hole section 112, and the extended measuring rod 3 is clearance-matched with the lower hole section 113.

[0039] The indicating gauge 2 is a micrometer with the probe under the measuring rod 23 of the lower body removed, the dial 21, the mounting rod 22 and the measuring rod 23 of the micrometer are retained, and then the extended measuring rod 3 is connected to the measuring rod 23 of the body, so that the probe on the micrometer is replaced by the extended measuring rod 3. When in use, after the lower end of the extended measuring rod 3 is against the measured surface, the extended measuring rod 3 and the measuring rod 23 of the body are linked to drive the pointer in the dial 21 to rotate.

[0040] In this embodiment, the front end surface of the support block 1 protrudes forward at the position corresponding to the upper hole section 111 to form a boss structure 13, and the shaft body avoidance groove 12 is located at the lower side of the boss structure 13. Since the diameter of the upper hole section 111 needs to match the mounting rod 22, the radius of the upper hole section 111 is relatively large, and the mounting rod 22 needs to be fixed in the upper hole section 111 through the positioning member 5. When fixed, the positioning member 5 abuts against the mounting rod 22 to the hole wall of the upper hole section 111, so it is necessary to form a boss structure 13 to ensure sufficient wall thickness to provide support for the mounting rod 22. The radius of the upper hole section 111 is relatively large and the wall thickness of the boss structure 13 is relatively thick, and the hole diameter and wall thickness of this part cannot be reduced, so the boss structure 13 is designed to be higher than the shaft body 62, and the shaft body 62 avoidance groove is set below the boss structure 13. When inspecting the annular groove close to the outer circle of the shaft body 62, the lower end face of the supporting block 1 abuts against the upper end face of the base 61, the shaft avoidance groove 12 faces the outer circle of the shaft body 62, the boss structure 13 is located above the shaft body 62, and there is a gap between the lower end of the boss structure 13 and the upper end of the shaft body 62 to prevent the boss structure 13 from interfering with the shaft body 62.

[0041] In this embodiment, the distance D between the bottom wall of the shaft avoidance groove 12 and the central axis of the stepped hole 11 is smaller than the radius R of the upper hole section 111 . Since the shaft ring groove 63 is close to the outer circle of the shaft body 62 and the width of the shaft ring groove 63 is narrow, it is necessary to ensure that when the extended measuring rod 3 is inserted into the shaft ring groove 63, the outer circle of the shaft body 62 does not contact the bottom wall of the shaft body avoidance groove 12. Since the center axis of the extended measuring rod 3 is basically coaxial with the center axis of the stepped hole 11, considering the above reasons, it is necessary to ensure that the distance between the bottom wall of the shaft body avoidance groove 12 and the center axis of the stepped hole 11 is small. In this embodiment, the distance between the bottom wall of the shaft body avoidance groove 12 and the center axis of the stepped hole 11 is smaller than the radius of the upper hole section 11, and the boss structure 13 that cannot avoid interference is set above the shaft body 62, and the bottom of the boss structure 13 is set to a structure with a small aperture and a small wall thickness to form a shaft body avoidance groove 12, so as to prevent the bottom wall of the shaft body avoidance groove 12 from contacting the outer circle of the shaft body 62 when measuring the groove depth.

[0042] In this embodiment, the extended measuring rod 3 includes a connecting portion 31, a main rod portion 32 and a ball head portion 33 which are arranged in sequence from top to bottom. The connecting portion 31 is connected to the body measuring rod 23, and a knurling 321 is arranged on the main rod portion 32. The connecting portion 31 is provided with an external thread, which can be threadedly connected to the body measuring rod 23 of the indicating measuring tool 2. The knurling 321 on the main rod portion 32 can increase the friction force, which is convenient for rotating and applying force when disassembling the extended measuring rod 3. The main rod portion 32 can greatly increase the measurable length, ensure that a large distance can be maintained between the indicating measuring tool 2 and the shaft ring groove 63, so that the indicating measuring tool 2 can extend upward from the shaft body 62, which is convenient for observation and reading, and ensures that the scale can be directly facing and level when reading, so as to prevent inaccurate readings caused by squinting at the indicating measuring tool 2. When measuring and the inspection tool is zeroed, the ball head portion 33 is in point contact with the groove to be measured or the calibration platform 41, and the measurement is more accurate.

[0043] In this embodiment, a positioning member 5 is also included; the interior of the support block 1 is also provided with a positioning hole 14 whose axis is along the front-to-back direction, the positioning hole 14 is connected to the upper hole section 111, and the positioning member 5 is threadedly connected to the positioning hole 14. By tightening or loosening the positioning member 5, the position of the indicating gauge 2 can be locked or unlocked, so that the indicating gauge 2 and the support block 1 can be connected in a detachable manner. After the indicating gauge 2 is connected to the extended measuring rod 3, the extended measuring rod 3 is passed through the stepped hole 11 from top to bottom, and the mounting rod 22 of the indicating gauge 2 is clearance-matched with the upper hole section 111. At this time, by tightening the positioning member 5, the positioning member 5 abuts against the mounting rod 22 to the hole wall of the upper hole section 111, so that the position of the indicating gauge 2 is locked. By loosening the positioning member 5, the positioning member 5 and the mounting rod 22 are separated, so that the position of the indicating gauge 2 is unlocked.

[0044] In this embodiment, the proofreading rule 4 is provided with a proofreading groove 42, and the proofreading platform 41 is located in the proofreading groove 42; the upper end surface of the proofreading rule 4 and the upper end surface of the proofreading platform 41 are both planes, and the distance between the two planes is L. "L" is the basic dimension of the groove depth design of the shaft-contacting ring groove 63, and the allowable deviation range of the shaft-contacting ring groove 63 is -0.01mm to +0.01mm, and the actual size of the shaft-contacting ring groove 63 should be within the range of "L±0.01mm". When the gauge is zeroed, first connect the indicating gauge 2 with the extended measuring rod 3, then pass the extended measuring rod 3 through the stepped hole 11 from top to bottom, then place the supporting block 1 on the calibration gauge 4 and apply a certain pressure to the supporting block 1 to ensure that the supporting block 1 is close to the upper end surface of the calibration gauge 4, and then adjust the positions of the indicating gauge 2 and the extended measuring rod 3, so that the ball head 33 of the extended measuring rod 3 abuts against the upper end surface of the calibration platform 41. At this time, by tightening the positioning piece 5, the positioning piece 5 abuts against the mounting rod 22 to the hole wall of the upper hole section 111, so as to lock the position of the indicating gauge 2, and finally rotate the dial 21 of the indicating gauge 2 to ensure that the needle of the dial 21 points to the scale "0", and the gauge is zeroed.

[0045] In this embodiment, rough machining grooves 43 are provided on the left and right sides of the proofreading platform 41. The upper end surface of the proofreading platform 41 needs to be fine-machined by a grinder. By providing the rough machining grooves 43 on the left and right sides of the proofreading platform 41, the fine machining area can be reduced, and the processing difficulty at the corner of the proofreading groove 42 can be reduced.

[0046] The shaft-adhering ring groove depth gauge of this embodiment comprises the following steps when used:

[0047] S1, the indicating measuring tool 2 is connected with the extended measuring rod 3;

[0048] Specifically, the indicating measuring tool 2 is a micrometer with the probe below the measuring rod 23 of the table body removed, the dial 21, the mounting rod 22 and the measuring rod 23 of the table body are retained, and then the extended measuring rod 3 is connected to the measuring rod 23 of the table body, so that the extended measuring rod 3 replaces the probe on the micrometer;

[0049] The assembly formed by connecting S2, indicating measuring tool 2 and extended measuring rod 3 is connected to the supporting block 1;

[0050] Specifically, the extended measuring rod 3 is passed through the stepped hole 11 from top to bottom, the mounting rod 22 is clearance-matched with the upper hole section 111, the meter body measuring rod 23 is clearance-matched with the middle hole section 112, the extended measuring rod 3 is clearance-matched with the lower hole section 113, and the lower part of the extended measuring rod 3 extends downward from the support block 1;

[0051] S3, the positioning member 5 is connected to the supporting block 1;

[0052] Specifically, the positioning member 5 is screwed into the positioning hole 14 to connect the positioning member 5 with the support block 1. However, the tightening amount should be such that the end of the positioning member 5 is still located in the positioning hole 14 to prevent the positioning member 5 from contacting the mounting rod 22 of the indicating gauge 2.

[0053] S4, the inspection tool is relatively zero;

[0054] Specifically, the supporting block 1 is placed on the calibration gauge 4 and a certain pressure is applied to the supporting block 1 to ensure that the supporting block 1 is in close contact with the upper end surface of the calibration gauge 4, and the indicating gauge 2 and the extended measuring rod 3 are adjusted to a suitable position to ensure that the ball head 33 of the extended measuring rod 3 is against the upper end surface of the calibration platform 41. At this time, by tightening the positioning member 5, the positioning member 5 is against the mounting rod 22 to the hole wall of the upper hole section 111, so as to realize the position locking of the indicating gauge 2, and finally, the dial 21 of the indicating gauge 2 is rotated to ensure that the needle of the dial 21 points to the scale "0", and the gauge is completed to zero;

[0055] S5, measuring the axle ring groove 63;

[0056] Specifically, the body 6 of the fuel injection pump housing of the ship engine includes a base 61 and a shaft 62 protruding upward from the base 61, and the shaft-contacting annular groove 63 is an annular groove close to the outer circle of the shaft 62. The support block 1 after the inspection tool is completed in step S4 is taken out, and the shaft-contacting groove 12 of the support block 1 faces the outer circle of the shaft 62. The support block 1 is placed on the base 61 and a certain pressure is applied to the support block 1 to ensure that the support block 1 is close to the base 61. Then, the dial 21 is looked at horizontally, and the needle of the dial 21 is read to point to the scale, and the actual deviation value of the shaft-contacting annular groove 63 can be obtained, so as to determine whether the actual deviation value is within the allowable range. The actual size of the shaft-contacting annular groove 63 = the basic design size L of the groove depth of the shaft-contacting annular groove 63 + the actual deviation value;

[0057] S6. After performing the measurement of step S5 for multiple times, it is necessary to return to step S4 to perform zero calibration again to ensure the accuracy of the measured value, wherein multiple times refers to more than three times, for example, five times.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A shaft-mounted ring groove depth gauge, characterized in that: The invention comprises a support block (1), an indicating gauge (2), an extended measuring rod (3) and a calibration gauge (4); the support block (1) is provided with a stepped hole (11) whose axis is along the up-down direction inside, the calibration gauge (4) is arranged on the lower side of the support block (1), and a calibration platform (41) is arranged on the calibration gauge (4) at a position corresponding to the stepped hole (11); the stepped hole (11) is arranged on a side close to the front end surface of the support block (1), and a shaft avoidance groove (12) is arranged on the front end surface of the support block (1); the indicating gauge (2) is connected to the support block (1) in a detachable manner, the lower part of the indicating gauge (2) extends into the stepped hole (11), the lower part of the indicating gauge (2) is connected to the upper part of the extended measuring rod (3), the extended measuring rod (3) passes through and extends downward from the stepped hole (11), and the lower end of the extended measuring rod (3) can abut against the calibration platform (41).

2. The shaft-adhering ring groove depth gauge according to claim 1, characterized in that: The stepped hole (11) comprises an upper hole section (111), a middle hole section (112) and a lower hole section (113) which are arranged in sequence from top to bottom, and the radius of the upper hole section (111), the radius of the middle hole section (112) and the radius of the lower hole section (113) decrease in sequence.

3. The shaft-adhering ring groove depth gauge according to claim 2, characterized in that: The front end surface of the support block (1) protrudes forward at a position corresponding to the upper hole section (111) to form a boss structure (13), and the shaft avoidance groove (12) is located at the lower side of the boss structure (13).

4. The shaft-adhering ring groove depth gauge according to claim 2 or 3, characterized in that: The distance D between the bottom wall of the shaft body avoidance groove (12) and the central axis of the stepped hole (11) is smaller than the radius R of the upper hole section (111).

5. The shaft-adhering ring groove depth gauge according to claim 2, characterized in that: The indicating measuring tool (2) comprises a dial (21), a mounting rod (22) and a meter body measuring rod (23); the mounting rod (22) is connected to the dial (21); the upper portion of the meter body measuring rod (23) extends into the mounting rod (22); and the extended measuring rod (3) is connected to the meter body measuring rod (23).

6. The shaft-adhering ring groove depth gauge according to claim 5, characterized in that: The mounting rod (22) is clearance-matched with the upper hole section (111), the meter body measuring rod (23) is clearance-matched with the middle hole section (112), and the extended measuring rod (3) is clearance-matched with the lower hole section (113).

7. The shaft-adhering ring groove depth gauge according to claim 6, characterized in that: The extended measuring rod (3) comprises a connecting portion (31), a main rod portion (32) and a ball head portion (33) which are arranged in sequence from top to bottom; the connecting portion (31) is connected to the meter body measuring rod (23); and the main rod portion (32) is provided with a knurling (321).

8. The shaft-adhering ring groove depth gauge according to claim 6, characterized in that: The support block (1) further comprises a positioning member (5); a positioning hole (14) whose axis is along the front-to-back direction is provided inside the support block (1); the positioning hole (14) is communicated with the upper hole section (111); the positioning member (5) is threadedly connected to the positioning hole (14); and the position of the indicating measuring tool (2) can be locked or unlocked by tightening or loosening the positioning member (5).

9. The shaft-adhering ring groove depth gauge according to claim 1, characterized in that: The calibration gauge (4) is provided with a calibration groove (42), and the calibration platform (41) is located in the calibration groove (42); the upper end surface of the calibration gauge (4) and the upper end surface of the calibration platform (41) are both planes, and the distance between the two planes is L.

10. The shaft-adhering ring groove depth gauge according to claim 7, characterized in that: Rough processing grooves (43) are provided on the left and right sides of the calibration platform (41).

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