Center hole distance gauge

Abstract

The utility model discloses a center hole distance testing fixture relates to measuring tool technical field, it includes positioning sleeve, conical floating measuring head, indicating meter table seat, indicating meter, the bottom surface of positioning sleeve is used for with workpiece adhesion positioning, the detection end of conical floating measuring head is used for passing positioning sleeve, and can along the height direction of positioning sleeve remove, the top of conical floating measuring head is located in indicating meter table seat, and can along the height direction of indicating meter table seat remove, indicating meter sets up on indicating meter table seat, and the indicating meter elongated probe of indicating meter bottom end is in contact with the top of conical floating measuring head. The utility model is suitable for using on line edge, and the measurement speed is fast, and the measurement accuracy is high, and the operator is convenient to operate and checks, is favorable to production field quality control.

Description

Technical Field

[0001] This utility model relates to the field of measuring tool technology, and in particular to a center hole distance gauge. Background Technology

[0002] In the current technology, the distance from the stepped surface to the center hole of shaft parts cannot be measured using ordinary measuring tools. Currently, coordinate measuring machines or optical measuring machines are mostly used for inspection. It takes about 5 minutes to inspect the center distance of a product. Furthermore, since coordinate measuring machines and optical measuring machines are generally located in a precision measurement room, it takes time for the operator to go from the workshop to the precision measurement room to send the test data and pick up the test report. This method cannot obtain test data in a timely manner, which is not conducive to quality control on the production site.

[0003] Therefore, those skilled in the art have provided a center hole distance gauge to solve the problems mentioned in the background art. Utility Model Content

[0004] This utility model provides a center hole distance gauge that is suitable for use on the line, has a fast measurement speed, high measurement accuracy, is convenient for operators to self-inspect, and is beneficial to quality control on the production site.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a center hole distance gauge, comprising: A positioning sleeve, the bottom surface of which is used to fit and position the workpiece. A conical floating probe, the probe end of which is used to pass through the positioning sleeve and can move along the height direction of the positioning sleeve; The top of the conical floating probe is located inside the indicator base and can move along the height direction of the indicator base. An indicator is mounted on an indicator base, and the extended probe at the bottom of the indicator contacts the top of the conical floating probe.

[0006] Furthermore, the top surface of the indicator base is recessed inward to form a first circular hole, the top of the first circular hole is threadedly connected to a threaded sleeve, the top surface of the threaded sleeve is recessed inward to form a second circular hole, and the extended probe of the indicator passes through the second circular hole.

[0007] Furthermore, a compression spring is abutted between the bottom end of the threaded sleeve and the conical floating probe, and the compression spring is sleeved on the extended probe of the indicator.

[0008] Furthermore, the top of the threaded sleeve has an indicator chuck, which clamps the extended indicator probe by a first internal hexagon head screw.

[0009] Furthermore, the bottom surface of the indicator base is recessed inward to form a third circular hole, which is connected to the first circular hole and has a larger diameter than the first circular hole. The top of the conical floating probe is located inside the third circular hole and moves along the axial direction of the third circular hole.

[0010] Furthermore, the top surface of the positioning sleeve is recessed inward to form a fourth circular hole, through which the conical floating probe passes.

[0011] Furthermore, the bottom surface of the positioning sleeve is recessed inward to form a fifth circular hole, which is connected to the fourth circular hole and the diameter of the fifth circular hole is larger than the diameter of the fourth circular hole. A calibration element is provided inside the fifth circular hole.

[0012] Furthermore, the top of the calibration component extends into the fifth circular hole, and the center of the top surface of the calibration component is recessed inward to form a through hole. There is a tapered surface between the top of the through hole and the top surface of the calibration component, and the bottom end of the tapered floating probe can extend into the through hole along the tapered surface.

[0013] Furthermore, the top diameter of the calibration piece is larger than the bottom diameter of the calibration piece, and an arc-shaped groove is provided at the junction of the top and bottom of the calibration piece. The bottom end of the inner wall of the fifth circular hole protrudes inward to form an annular protrusion, which is inserted into the arc-shaped groove.

[0014] Furthermore, the top surface of the indicator base is recessed inward to form multiple positioning holes, which are distributed in a circle along the axis of the first circular hole. Each positioning hole is provided with a second hexagon socket head cap screw, which passes through the indicator base and connects to the positioning sleeve.

[0015] In the above technical solution, the center hole distance gauge provided by this utility model has the following beneficial effects: 1. The inspection tool in this application is simple to operate, the indicator reading is intuitive, the inspection speed is fast, the repeatability is good, and it fully meets the dimensional accuracy requirements.

[0016] 2. The positioning datum of the inspection fixture (the step surface of the workpiece) is consistent with the drawing, thus eliminating positioning errors.

[0017] 3. The angle between the conical surface of the conical floating probe and the center hole of the workpiece is consistent, and the operating state of the center hole is consistent.

[0018] 4. During testing, under the action of the compression spring, the conical floating probe always maintains contact with the conical surface of the workpiece's center hole, ensuring accurate and reliable measurement values.

[0019] 5. The indicator bushing is locked by a threaded sleeve, which not only ensures a stable connection but also guarantees that the probe can move freely and will not cause the indicator to jam. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 A cross-sectional view of a center hole distance gauge provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified structural diagram of part A; Figure 3 for Figure 1 Front view of the positioning sleeve; Figure 4 for Figure 3 A sectional view; Figure 5 yes Figure 1 Front view of the conical floating probe; Figure 6 for Figure 1 The front view of the indicator table base; Figure 7 for Figure 6 A sectional view; Figure 8 for Figure 1 Front view of the threaded sleeve; Figure 9 for Figure 8 A sectional view; Figure 10 for Figure 1 A cross-sectional view of the dial indicator clamp in the horizontal direction; Figure 11 for Figure 1 A vertical sectional view of the gauge clip; Figure 12 for Figure 1 Schematic diagram of the extended probe of the indicator; Figure 13 for Figure 1 A cross-sectional view of the calibration component.

[0022] Explanation of reference numerals in the attached figures: 10. Positioning sleeve; 11. Fourth circular hole; 12. Fifth circular hole; 13. Annular protrusion; 20. Conical floating probe; 21. Compression spring; 30. Indicator base; 31. First circular hole; 32. Threaded sleeve; 33. Second circular hole; 34. Indicator chuck; 35. First hexagon socket head cap screw; 36. Third circular hole; 37. Locating hole; 38. Second hexagon socket head cap screw; 39. Open slot; 40. Indicator; 41. Indicator with extended probe; 50. Calibration component; 51. Through hole; 52. Tapered surface; 53. Arc-shaped slot. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] See Figure 1-13 As shown; The center hole distance gauge described in this embodiment of the utility model includes: Positioning sleeve 10, the bottom surface of which is used to fit and position the workpiece; A conical floating probe 20, the probe end of which is used to pass through the positioning sleeve 10 and can move along the height direction of the positioning sleeve 10; The top of the conical floating probe 20 is located inside the indicator base 30 and can move along the height direction of the indicator base 30. The indicator 40 is mounted on the indicator base 30, and the extended indicator probe 41 at the bottom of the indicator 40 is in contact with the top of the conical floating probe 20.

[0025] During the specific testing, the bottom surface of the positioning sleeve 10 is fitted and positioned against the workpiece, and the conical floating probe 20 moves along the hole wall of the center hole of the workpiece. The change in flux is transmitted to the indicator 40 through the side of the conical floating probe 20. The reading of the indicator 40 is the deviation from the calibration value of the calibration piece.

[0026] The top surface of the indicator base 30 is recessed inward to form a first circular hole 31. The top of the first circular hole 31 is threadedly connected to a threaded sleeve 32. The top surface of the threaded sleeve 32 is recessed inward to form a second circular hole 33. The extended probe 41 of the indicator passes through the second circular hole 33.

[0027] The indicator 40 is set in the middle of the top surface of the indicator base 30 through the threaded sleeve 32, so as to be detected by the conical floating probe 20. The threaded connection can ensure that the indicator base 30 and the extended indicator probe 41 are coaxially set, thus ensuring detection accuracy.

[0028] A compression spring 21 abuts against the bottom end of the threaded sleeve 32 and the conical floating probe 20. The compression spring 21 is sleeved on the extended probe 41 of the indicator.

[0029] One end of the compression spring 21 rests against the bottom surface of the threaded sleeve 32. Since the threaded sleeve 32 is fixedly connected to the indicator base 30 by threads, the compression spring 21 compresses the conical floating probe 20, ensuring that the conical floating probe 20 is always in contact with the surface being tested.

[0030] The top of the threaded sleeve 32 has an indicator chuck 34, which clamps the extended probe 41 of the indicator chuck 34 with a first internal hexagonal head screw 34. The threaded sleeve 32 has four opening slots 39.

[0031] The first internal hexagonal head screw 35 passes through both ends of the indicator chuck 34. The indicator chuck 33 is fitted onto the indicator extension probe 41. The first internal hexagonal head screw 35 is tightened by bolts so that the indicator chuck 33 clamps the indicator extension probe 41.

[0032] The first internal hexagonal head screw 35 and the indicator chuck 33 are designed to facilitate the removal and installation of the indicator 40.

[0033] The bottom surface of the indicator base 30 is recessed inward to form a third circular hole 36. The third circular hole 36 is connected to the first circular hole 31, and the diameter of the third circular hole 36 is larger than the diameter of the first circular hole 36. The top of the conical floating probe 20 is located inside the third circular hole 36 and moves along the axial direction of the third circular hole 36.

[0034] The top of the conical floating probe 20 can move within the third circular hole 36, effectively ensuring that the conical floating probe 20 will not tilt during operation. At the same time, the compression spring 21 can prevent the conical floating probe 20 from colliding with the bottom wall of the third circular hole 36.

[0035] The top surface of the positioning sleeve 10 is recessed inward to form a fourth circular hole 11, through which the conical floating probe 20 passes.

[0036] The bottom surface of the positioning sleeve 10 is recessed inward to form a fifth circular hole 12. The fifth circular hole 12 is connected to the fourth circular hole 11, and the diameter of the fifth circular hole 12 is larger than the diameter of the fourth circular hole 11. A calibration element 50 is provided in the fifth circular hole 12.

[0037] The fifth circular hole 12 facilitates the cooperation between the calibration component 50 and the positioning sleeve 10, thereby enabling the zeroing operation of the indicator 40.

[0038] The top of the calibration component 50 extends into the fifth circular hole 12. The top surface of the calibration component 50 is recessed inward to form a through hole 51. There is a tapered surface 52 between the top of the through hole 51 and the top surface of the calibration component 50. The bottom end of the tapered floating probe 20 can extend into the through hole 51 along the tapered surface 52.

[0039] The conical surface 52 is designed to facilitate contact between the conical floating probe 20 and the zeroing operation of the indicator 40.

[0040] The top diameter of the calibration component 50 is greater than that of the bottom diameter of the calibration component 50. An arc-shaped groove 53 is provided at the junction of the top and bottom of the calibration component 50. The bottom end of the inner wall of the fifth circular hole 12 protrudes inward to form an annular protrusion 13, which is inserted into the arc-shaped groove 53.

[0041] To prevent the calibration piece 50 from falling off the positioning sleeve 10 during the zeroing operation of the indicator 40, the calibration piece 50 and the positioning sleeve 10 are connected by a mutually cooperating annular protrusion 13 and arc-shaped groove 50.

[0042] Furthermore, the top surface of the indicator base 30 is recessed inward to form three positioning holes 37. The three positioning holes 37 are distributed in a circle along the axis of the first circular hole 31. Each positioning hole 37 is provided with a second hexagonal head screw 38, which passes through the indicator base 30 and connects to the positioning sleeve 10.

[0043] The positioning sleeve 10 and the indicator base 30 can be fixed by the cooperation of the positioning hole 36 and the second hexagonal cylindrical head screw 37. The bottom surface of the indicator base 30 can be tightly fitted with the top surface of the positioning sleeve 10. In use, the bottom surface of the fifth circular hole 12 on the positioning sleeve 10 near the fourth circular hole 11 is fitted and positioned with the calibration piece 50 or the workpiece. The fourth circular hole 11 is clearance fitted with the conical floating probe 20.

[0044] The inspection method of this fixture is a comparative measurement. Before measurement, the indicator 40 is zeroed using the calibration piece 50. When measuring the workpiece, the change in the position of the workpiece's center hole is transmitted to the indicator through the conical floating probe 20 at a ratio of 1:1. The reading of the indicator 40 is the deviation relative to the calibration piece's verification value. The actual value of the workpiece's center distance is obtained by adding the reading of the indicator 40 to the calibration piece's verification value. This fixture offers fast inspection speed, good repeatability, and fully meets the dimensional accuracy requirements.

[0045] The indicator 40 is a 0-1mm dial indicator.

[0046] The inspection tool applied for has been successfully used on the production line, greatly facilitating on-site product quality control.

[0047] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A center hole distance gauge, characterized in that, include: Positioning sleeve (10), the bottom surface of which is used to fit and position with the workpiece; A conical floating probe (20) has its probe end used to pass through the positioning sleeve (10) and can move along the height direction of the positioning sleeve (10); The top of the conical floating probe (20) is located inside the indicator base (30) and can move along the height direction of the indicator base (30); The indicator (40) is mounted on the indicator base (30), and the extended indicator probe (41) at the bottom of the indicator (40) is in contact with the top of the conical floating probe (20).

2. The center hole distance gauge according to claim 1, characterized in that: The top surface of the indicator base (30) is recessed inward to form a first circular hole (31). The top of the first circular hole (31) is threadedly connected to a threaded sleeve (32). The top surface of the threaded sleeve (32) is recessed inward to form a second circular hole (33). The extended probe (41) of the indicator passes through the second circular hole (33).

3. The center hole distance gauge according to claim 2, characterized in that: A compression spring (21) abuts against the bottom end of the threaded sleeve (32) and the conical floating probe (20), and the compression spring (21) is sleeved on the extended probe (41) of the indicator.

4. A center hole distance gauge according to claim 3, characterized in that: The top of the threaded sleeve (32) has an indicator chuck (34), which clamps the extended indicator probe (41) by a first internal hexagonal head screw (35).

5. A center hole distance gauge according to claim 1, characterized in that: The bottom surface of the indicator base (30) is recessed inward to form a third circular hole (36). The third circular hole (36) is connected to the first circular hole (31), and the diameter of the third circular hole (36) is larger than the diameter of the first circular hole (31). The top of the conical floating probe (20) is located inside the third circular hole (36) and moves along the axial direction of the third circular hole (36).

6. A center hole distance gauge according to claim 1, characterized in that: The top surface of the positioning sleeve (10) is recessed inward to form a fourth circular hole (11), through which the conical floating probe (20) passes.

7. A center hole distance gauge according to claim 1, characterized in that: The bottom surface of the positioning sleeve (10) is recessed inward to form a fifth circular hole (12). The fifth circular hole (12) is connected to the fourth circular hole (11), and the diameter of the fifth circular hole (12) is larger than the diameter of the fourth circular hole (11). A calibration element (50) is provided in the fifth circular hole (12).

8. A center hole distance gauge according to claim 7, characterized in that: The top of the calibration component (50) extends into the fifth circular hole (12), and the top surface of the calibration component (50) is recessed inward to form a through hole (51). There is a conical surface (52) between the top of the through hole (51) and the top surface of the calibration component (50), and the bottom end of the conical floating probe (20) can extend into the through hole (51) along the conical surface (52).

9. A center hole distance gauge according to claim 8, characterized in that: The top diameter of the calibration piece (50) is larger than the bottom diameter of the calibration piece (50). An arc-shaped groove (53) is provided at the junction of the top and bottom of the calibration piece (50). The bottom end of the inner wall of the fifth circular hole (12) protrudes inward to form an annular protrusion (13). The annular protrusion (13) is inserted into the arc-shaped groove (53).

10. A center hole distance gauge according to claim 1, characterized in that: The top surface of the indicator base (30) is recessed inward to form a plurality of positioning holes (37). The plurality of positioning holes (37) are distributed in a circle along the axis of the first circular hole (31). Each positioning hole (37) is provided with a second internal hexagonal head screw (38). The second internal hexagonal head screw (38) passes through the indicator base (30) and connects to the positioning sleeve (10).

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