Inner hole thread length measuring device

Abstract

The utility model provides an inner bore thread length measuring device, which comprises a U-shaped ruler frame, a U-shaped measuring anvil and a measuring rod, the ruler frame is provided with a first ruler arm and a second ruler arm, the measuring anvil is provided with a first anvil arm and a second anvil arm, the first ruler arm is fixedly connected with a sleeve, the sleeve is in threaded connection with a micrometric screw, the second ruler arm is in sliding fit connection with the measuring rod, and the surface of the measuring rod is provided with reference threads. The first anvil arm and the second anvil arm are both connected with the ruler frame in a sliding fit mode, the first anvil arm and the micrometric screw are opposite to each other, and the second anvil arm and the measuring rod are opposite to each other. According to the technical scheme of the utility model, the corresponding measuring rod is selected according to the diameter of the thread, and during measurement, the measuring rod is completely meshed with the inner hole thread and then is locked, so that the measuring rod can accurately distinguish the boundary between the bottom hole and the thread, and the measurement of the length of the inner hole thread is transferred from the inside of the hole to the outside of the hole, so that a measurer can read the reading conveniently; the measurement precision is improved, and the measurement data is real and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to measuring device technical field, especially relate to a hole thread length measuring device. BACKGROUND

[0002] In the manufacturing field, in order to guarantee the manufacturing quality of parts, the features of various shape elements of parts need to be measured, when the hole depth of parts needs to be measured, the prior art mainly uses the following two methods to measure: one method is that the operator handholds the depth gauge to measure, on the one hand, due to the very limited internal space of the deep cavity of parts, on the other hand, the operator completely relies on own work experience to judge the direction of hand-held depth gauge and the relative position between depth gauge and measured workpiece, when the operator appears hand shake, then larger measurement error is prone to appear, the measurement precision is relatively low, and the reliability of measurement result is poor, another method is to use three coordinate measuring instrument to indirectly measure, this measurement method needs the operator to have quite skilled instrument operation technology and superb measurement technology, and still needs to obtain the final measurement result after a large amount of operation on the measurement result, the measurement operation time is relatively long, and the working efficiency is relatively low, and the three coordinate measuring instrument is currently expensive, and most small and medium-sized manufacturing enterprises are difficult to bear.

[0003] In the prior art, the patent literature with publication number: "CN220794110U" discloses a depth measuring device, including measuring tool, sliding block, measuring needle, supporting plate and supporting arm, the upper end of supporting arm is fixedly connected with supporting plate, the lower end of supporting arm extends downward along the vertical direction, the surface of supporting plate is provided with sliding groove, the measuring tool includes ruler frame and measuring rod, the ruler frame is fixedly connected with sliding block, the sliding block is sleeved in the sliding groove, the upper end of measuring needle is fixedly connected with measuring rod, and the lower end of measuring needle extends downward along the vertical direction.Using the patent technical scheme, the measurement operation has unified measurement reference, reduces measurement error, and improves measurement precision, however, when the length of hole thread needs to be measured, on the one hand, due to insufficient light in the hole, the measurement personnel cannot accurately read the number, on the other hand, the measurement personnel cannot distinguish the boundary between the internal bottom hole and thread, and can only measure the depth of bottom hole, and then judge the length of thread according to the depth of bottom hole according to experience, the measurement precision is not high, and the authenticity of measurement data is relatively low. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a hole thread length measuring device.

[0005] The utility model is realized through the following technical schemes.

[0006] The utility model provides a hole thread length measuring device, including U -shaped ruler frame, U -shaped measuring anvil and measuring rod, the ruler frame has first arm and second arm, the measuring anvil has first anvil arm and second anvil arm, first arm is fixedly connected with the sleeve, the sleeve is screw connected with the micrometer screw, second arm is connected with the measuring rod sliding fit, the surface of measuring rod is equipped with reference thread, first anvil arm, second anvil arm all are connected with the ruler frame sliding fit, and first anvil arm and micrometer screw are opposite each other, and second anvil arm and measuring rod are opposite each other.

[0007] The micrometer screw is also fixedly connected with the main knob, and the main knob is also fixedly connected with the differential cylinder, the sleeve is sleeved in the differential cylinder, the surface of the sleeve is also provided with a plurality of main scale lines, and the main scale lines are equidistantly arranged along the axial direction of the sleeve, and the outer circumferential surface of the differential cylinder is also provided with a plurality of secondary scale lines, and the secondary scale lines are equidistantly arranged along the circumferential direction of the differential cylinder.

[0008] The surface of the sleeve is also provided with a zero baseline, and the zero baseline is consistent with the axial direction of the sleeve, and the main scale lines and the zero baseline are perpendicular to each other.

[0009] The distance between any two adjacent main scale lines is 1mm.

[0010] The number of the secondary scale lines is 50.

[0011] The micrometer screw is also screw connected with the fine adjustment knob.

[0012] The ruler frame is also screw connected with the lock, and the lock is used for locking the relative position between the axial directions of the ruler frame, the micrometer screw, the first anvil arm, the second anvil arm and the measuring rod.

[0013] The lock can be replaced by a hexagonal bolt.

[0014] The utility model discloses the technical scheme, first push measuring anvil to the right end, then make micrometer screw and first anvil arm abut together, complete to zero, then, according to the diameter of the thread to be measured selects corresponding measuring rod, after connecting together with hole thread, lock the relative position between the axial directions of the ruler frame and the measuring rod, then pull measuring anvil, make second anvil arm and measuring rod abut together, rotate main knob, make micrometer screw and first anvil arm abut together, can read the hole thread length, because after the complete engagement of the measuring rod and the hole thread during measurement, lock, make the measuring rod accurately distinguish the boundary between the bottom hole and the thread, transfer the measurement of hole thread length from the hole to the outside, make the measurement personnel convenient to read the number, improve the measurement accuracy, and the measurement data is real and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1is the front view of the utility model;

[0016] Fig. 2 is the structure schematic view of zero time of using the utility model;

[0017] Fig. 3 is the structure schematic view of the structure after the measuring rod and the internal hole thread connection when measuring using the utility model;

[0018] Fig. 4 is the structure schematic view when measuring and reading the thread length indication number using the utility model.

[0019] In the drawing: 1 - ruler frame, 2 - measuring anvil, 3 - measuring rod, 4 - first ruler arm, 5 - second ruler arm, 6 - first anvil arm, 7 - second anvil arm, 8 - sleeve, 9 - micrometer screw, 10 - main knob, 11 - differential cylinder, 12 - main scale line, 13 - auxiliary scale line, 14 - zero baseline, 15 - fine adjustment knob, 16 - lock. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model is further described below, but the scope of protection is not limited to the description.

[0021] As Figs. 1 to 4 shown, the utility model provides a internal hole thread length measuring device, including U shape ruler frame 1, U shape measuring anvil 2 and measuring rod 3, ruler frame 1 has first ruler arm 4 and second ruler arm 5, measuring anvil 2 has first anvil arm 6 and second anvil arm 7, first ruler arm 4 is solidly connected with sleeve 8, sleeve 8 is screwed with micrometer screw 9, second ruler arm 5 is connected with measuring rod 3 with sliding fit, the surface of measuring rod 3 is equipped with reference thread, first anvil arm 6, second anvil arm 7 all are connected with ruler frame 1 with sliding fit, and first anvil arm 6 and micrometer screw 9 are opposite each other, and second anvil arm 7 and measuring rod 3 are opposite each other.

[0022] The technical scheme of the utility model is first pushed to the right end of measuring anvil, then the micrometer screw and first anvil arm are abutted together, the zero is completed, then according to the diameter of the thread to be measured, the corresponding measuring rod is selected, after the measuring rod and the internal hole thread are connected together, the relative position between ruler frame and measuring rod axial is locked using lock, then the measuring anvil is pulled, the second anvil arm and the measuring rod are abutted together, the main knob is rotated, the micrometer screw and the first anvil arm are abutted together, the internal hole thread length can be read, because after the measuring rod and the internal hole thread are completely engaged during measurement and locking, the measuring rod can accurately distinguish the boundary between the bottom hole and the thread, the measurement of the internal hole thread length is transferred from the hole to the outside, the measuring personnel is convenient to read the indication number, the measurement accuracy is improved, and the measurement data is real and reliable.

[0023] Specifically, the micrometer screw 9 is also fixedly connected with the main knob 10, the main knob 10 is also fixedly connected with the differential cylinder 11, the sleeve 8 is sleeved in the differential cylinder 11, the surface of the sleeve 8 is also provided with a plurality of main scale lines 12, and the main scale lines 12 are equidistantly arranged along the axial direction of the sleeve 8, and the outer circumferential surface of the differential cylinder 11 is also provided with a plurality of secondary scale lines 13, and the secondary scale lines 13 are equidistantly arranged along the circumferential direction of the differential cylinder 11. The main scale lines 12 are sequentially marked with natural numbers along the axial direction of the sleeve 8, when the first anvil arm 6 is arranged at the rightmost side, and the micrometer screw 9 and the first anvil arm 6 abut against each other, the edge of the differential cylinder 11 is aligned with the main scale line 12 marked as "0" on the sleeve 8, and the main scale line "zeroing" operation of the utility model is realized.

[0024] In addition, the surface of the sleeve 8 is also provided with a zero baseline 14, the zero baseline 14 is consistent with the axial direction of the sleeve 8, and the main scale line 12 and the zero baseline 14 are perpendicular to each other. The secondary scale lines 13 are sequentially marked with natural numbers along the circumferential direction of the differential cylinder 11, when the first anvil arm 6 is arranged at the rightmost side, and the micrometer screw 9 and the first anvil arm 6 abut against each other, the zero baseline 14 is also aligned with the secondary scale line 13 marked as "0" on the differential cylinder 11.

[0025] In addition, preferably, the interval between any two adjacent main scale lines 12 is 1mm. The number of secondary scale lines 13 is 50. The micrometer screw 9 is also screwed with the fine adjustment knob 15. The ruler frame 1 is also screwed with the lock 16, and the lock 16 is used to lock the relative position between the axial direction of the ruler frame 1 and the micrometer screw 9, the first anvil arm 6, the second anvil arm 7 and the measuring rod 3. Preferably, the lock 16 can be replaced by a hexagonal bolt.

Claims

1. An internal thread length measuring device, characterized by: The application relates to a U-shaped ruler frame (1), a U-shaped measuring anvil (2) and a measuring rod (3), the ruler frame (1) is provided with a first ruler arm (4) and a second ruler arm (5), the measuring anvil (2) is provided with a first anvil arm (6) and a second anvil arm (7), the first ruler arm (4) is fixedly connected with a sleeve (8), the sleeve (8) is screwed with a micrometer screw (9), the second ruler arm (5) is slidably connected with the measuring rod (3), the surface of the measuring rod (3) is provided with a reference thread, the first anvil arm (6) and the second anvil arm (7) are slidably connected with the ruler frame (1), and the first anvil arm (6) and the micrometer screw (9) are opposite to each other, and the second anvil arm (7) and the measuring rod (3) are opposite to each other.

2. The internal thread length measuring device of claim 1, wherein: The micrometer screw (9) is further fixedly connected with a main knob (10), the main knob (10) is further fixedly connected with a differential cylinder (11), the sleeve (8) is sleeved in the differential cylinder (11), the surface of the sleeve (8) is further provided with a plurality of main scale lines (12), the main scale lines (12) are equidistantly arranged along the axial direction of the sleeve (8), the outer circumferential surface of the differential cylinder (11) is further provided with a plurality of secondary scale lines (13), and the secondary scale lines (13) are equidistantly arranged along the circumferential direction of the differential cylinder (11).

3. The internal thread length measuring device of claim 2 wherein: The surface of the sleeve (8) is further provided with a zero baseline (14), the zero baseline (14) is consistent with the axial direction of the sleeve (8), and the main scale lines (12) and the zero baseline (14) are perpendicular to each other.

4. An internal thread length measuring device as claimed in claim 2 or 3, wherein: The distance between any two adjacent main scale lines (12) is 1mm.

5. The internal thread length measuring device of claim 2 wherein: The number of the secondary scale lines (13) is 50.

6. The internal thread length measuring device of claim 2 wherein: The micrometer screw (9) is further screwed with a fine adjustment knob (15).

7. The internal thread length measuring device of claim 1 or 6, wherein: The ruler frame (1) is further screwed with a locking device (16), the locking device (16) is used for locking the relative position between the ruler frame (1) and the micrometer screw (9), the first anvil arm (6), the second anvil arm (7) and the measuring rod (3) in the axial direction.

8. The bore thread length measuring apparatus of claim 7 wherein: The locking device (16) can be replaced by a hexagonal bolt.

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