CN218211136U

CN218211136U - Hole depth measuring device

Info

Publication number: CN218211136U
Application number: CN202222818716.5U
Authority: CN
Inventors: 李学磊; 赵坤江; 亢延亮; 林祥冰; 王强
Original assignee: Yantai Eddie Precision Machinery Co Ltd
Current assignee: Yantai Eddie Precision Machinery Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-01-03
Anticipated expiration: 2032-10-25

Abstract

The utility model relates to a hole depth measuring device, be in including measuring the base, setting measurement meter, measuring spindle, compression spring and anti-disengaging mechanism on the measuring base, the measurement meter is installed on measuring the base through the fastening jackscrew, the compression spring suit is on the measuring stick of measurement meter, and the measuring spindle that its lower extreme acted on, anti-disengaging mechanism includes spacing jackscrew and spacing groove, be equipped with the last jackscrew hole that is used for installing the fastening jackscrew on the measuring base, be used for installing the lower jackscrew hole and the axial through-hole of spacing jackscrew, the axial through-hole is including the table mounting hole that is used for installing the measurement meter of intercommunication and the axle mounting hole that is used for installing the measuring spindle, the spacing groove sets up the measuring spindle on the surface, the inner of spacing jackscrew passes down the jackscrew hole act on the spacing groove. The utility model discloses simple structure, convenient operation has avoided the influence of human factor, has not only improved hole depth measuring's efficiency, has improved hole depth measuring's accuracy moreover.

Description

Hole depth measuring device

Technical Field

The utility model relates to a hole depth measuring device belongs to hole depth detection technical field.

Background

During the manufacturing and assembling process of the hydraulic motor and the hydraulic pump, a plurality of assembling parts are involved, and various mounting holes such as screw holes are needed for connection among the assembling parts. The hole is the basis of the assembly of each part, and influences the processing precision of the whole product, so the depth measurement of the processed hole is very important.

The existing measurement of hole depth adopts a measuring rod, the measuring rod extends into a hole for measurement, the measuring rod is provided with a measuring scale and can mark the depth value of a corresponding hole to be measured, the measuring rod is required to be parallel to the center line of the hole in the measuring process, the measuring mode is greatly influenced by human factors, and the measurement is inaccurate; the vernier caliper is adopted, the end face of a measuring seat of the vernier caliper abuts against the end face of the hole to be measured, then the ruler of the vernier caliper stretches into the hole to be measured, the measuring ruler is parallel to the central line of the hole to be measured, otherwise, the measuring accuracy of the hole depth can be influenced, however, the measuring mode is influenced by human factors, the measuring is difficult, the measuring efficiency is low, the measuring accuracy is not enough, and the installation between subsequent assembly parts can be influenced.

Disclosure of Invention

The utility model discloses to the not enough of prior art existence, provide a hole depth measuring device.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a hole depth measuring device comprises a measuring base, a measuring meter, a measuring shaft, a compression spring and an anti-falling mechanism, wherein the measuring meter is arranged on the measuring base, the compression spring is arranged between the measuring meter and the measuring shaft, the anti-falling mechanism is used for limiting the measuring shaft, the measuring meter is installed on the measuring base through a fastening jackscrew, the compression spring is sleeved on a measuring rod of the measuring meter, the lower end of the compression spring acts on the measuring shaft, the anti-falling mechanism comprises a limiting jackscrew and a limiting groove, an upper jackscrew hole used for installing the fastening jackscrew, a lower jackscrew hole used for installing the limiting jackscrew and an axial through hole are formed in the measuring base, the axial through hole comprises a meter installation hole used for installing the measuring meter and an axle installation hole used for installing the measuring shaft, the limiting groove is formed in the surface of the measuring shaft, and the inner end of the limiting jackscrew penetrates through the lower jackscrew hole to act on the limiting groove.

The utility model has the advantages that: the measuring shaft passes through the locking mechanism restraint on measuring the base, specifically be through the cooperation of spacing jackscrew with the epaxial spacing groove of measuring, the spacing groove can be spacing to the stroke of measuring the axle, the groove top can prevent that the measuring shaft from droing, the tank bottom portion then can be spacing to the highest position of measuring the axle, avoid the measuring shaft excessively to move up to damage the meter, this kind of structure still does not receive the restraint of axle mounting hole aperture, can change the measuring shaft of different external diameters according to the aperture of the hole of wanting to be measured, so that the device can be applied to more porous measurement, the reasonable selection of measuring shaft also has certain improvement effect to the hole depth measuring accuracy, if select the problem that the too thin measuring shaft probably has the slope at the measuring process measuring shaft to the macropore, can't guarantee that the axis of measuring shaft is parallel with the central line in hole, can influence measuring result's accuracy. The hole depth to different apertures measures and can select suitable measuring shaft, and measuring shaft stretches into to be measured downtheholely, and after measuring shaft touched the end, upper portion extruded the measuring stick of gauge, carries out the hole depth through the gauge reading and measures, and the measuring shaft automatic playback under compression spring's effect after the measurement avoids the unanimous compression gauge in top of unanimous measuring shaft to influence the life of gauge. The utility model discloses simple structure, convenient operation has avoided the influence of human factor, has not only improved hole depth measuring's efficiency, has improved hole depth measuring's accuracy moreover.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, a clamping sleeve is arranged between the measuring meter and the measuring base, and the fastening jackscrew acts on the clamping sleeve to fix the measuring meter on the measuring base.

The beneficial effect who adopts above-mentioned further scheme is that, the fastening jackscrew can compress tightly or compress the clamping sleeve and then press from both sides tight meter, and the clamping sleeve suit can play the effect that prevents the fastening jackscrew and damage the meter on the measuring stick cover of meter to protect the measuring stick cover and/or the measuring stick of meter, prolong the life of meter.

Furthermore, the meter mounting hole is a stepped hole, and an annular shoulder used for positioning the clamping sleeve is arranged in the meter mounting hole.

The beneficial effect who adopts above-mentioned further scheme is, can fix a position the clamping sleeve, and the clamping sleeve suit is sheathe in the measuring stick of measuring meter, also can fix a position the position of measuring meter through the location of clamping sleeve.

Furthermore, the upper end of the compression spring acts on a measuring rod sleeve or the clamping sleeve of the measuring meter.

Adopt above-mentioned further scheme's beneficial effect be, compression spring's upper end is used in the measuring stick cover of measurement gauge, or the clamping sleeve can also regard as the spring fixing base, and compression spring's upper end also can be used in the clamping sleeve.

Further, the aperture of the shaft mounting hole is larger than the outer diameter of the measuring shaft.

Adopt above-mentioned further scheme's beneficial effect is that, the measuring spindle passes through the restraint of anti-disengaging mechanism on measuring the base, through the machining depth in measuring spindle detectable hole, certainly detects to the removable different measuring spindles in different apertures.

Furthermore, the width of the limiting groove is matched with the outer diameter of the limiting jackscrew, or the width of the limiting groove is larger than the outer diameter of the limiting jackscrew.

Adopt above-mentioned further scheme's beneficial effect be, spacing groove and spacing jackscrew cooperation will measure the axle restraint on measuring the base, avoid measuring the axle and drop.

Furthermore, the device also comprises a standard ring, wherein the standard ring is of an annular structure, and a standard hole is formed in the standard ring.

The beneficial effect of adopting above-mentioned further scheme is that, the calibration ring can be calibrated the spy extension degree of measuring shaft, place the platform with the calibration ring before using, the measuring shaft measures the thickness of calibration ring, the reading of percentage table this moment is recorded, and return to zero the pointer of percentage table, according to the thickness of standard ring 7, ensure the benchmark of measurement depth, insert the measuring shaft after the calibration downthehole unanimous with calibration ring 7 thickness requirement, judge the difference of hole depth for standard ring thickness according to the reading of record and the difference of percentage table pointer and zero-bit, the difference value is the difference of hole depth than the standard ring, can also in time judge hole depth quality.

Furthermore, a limiting shoulder used for positioning the measuring shaft is further arranged in the axial through hole.

The beneficial effect who adopts above-mentioned further scheme is that, the measuring spindle can pass through the axial home range of spacing groove restraint measuring spindle, also can carry on spacingly to the high-order of measuring spindle through spacing circular bead certainly, avoids measuring the excessive upwards damage meter of spindle.

Furthermore, the measuring meter adopts a dial indicator.

The dial indicator is used as a measuring instrument for changing the linear displacement of the measuring rod into the angular displacement of the pointer of the measuring instrument, is a high-precision comparison measuring tool, and can measure relative numerical values and absolute numerical values.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a standard ring of the present invention;

FIG. 3 is a schematic structural view of the measuring shaft of the present invention in a non-measuring state;

in the figure, 1, a measuring base; 11. a top thread hole is formed; 12. a lower jackscrew hole; 13. a watch mounting hole; 14. a shaft mounting hole; 2. a measuring meter; 21. a measuring rod; 22. a measuring rod sleeve; 3. a measuring shaft; 31. a limiting groove; 4. a compression spring; 5. a clamping sleeve; 6. limiting jackscrews; 7. fastening a jackscrew; 8. a standard ring.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following examples, which are intended to illustrate the present invention and not to limit the scope of the present invention.

As shown in fig. 1 to 3, a hole depth measuring device includes a measuring base 1, a measuring gauge 2, a measuring shaft 3, a compression spring 4 disposed between the measuring gauge 2 and the measuring shaft 3, and an anti-drop mechanism for limiting the measuring shaft 3, wherein the measuring gauge 2 is mounted on the measuring base 1 through a fastening jackscrew 7, the compression spring 4 is sleeved on a measuring rod 21 of the measuring gauge 2, and the lower end of the compression spring acts on the measuring shaft 3, the anti-drop mechanism includes a limiting jackscrew 6 and a limiting groove 31, an upper jackscrew hole 11 for mounting the fastening jackscrew 7, a lower jackscrew hole 12 for mounting the limiting jackscrew 6, and an axial through hole including a gauge mounting hole 13 for mounting the measuring gauge 2 and a shaft mounting hole 14 for mounting the measuring shaft 3 are provided on the measuring base 1, the limiting groove 31 is provided on the surface of the measuring shaft 3, and the inner end of the limiting jackscrew 6 passes through the lower jackscrew hole 12 and acts on the limiting groove 31.

The measuring shaft 3 is restricted on the measuring base 1 through the anti-falling mechanism, and particularly is matched with a limiting groove 31 on the measuring shaft 3 through a limiting jackscrew 6, the structure is not restricted by the aperture of the shaft mounting hole 14, the measuring shaft 3 with different outer diameters can be replaced according to the aperture of a to-be-measured hole, so that the device can be applied to measurement with more holes, and importantly, the reasonable selection of the measuring shaft 3 also has certain improvement effect on the hole depth measurement accuracy.

A clamping sleeve 5 is further arranged between the measuring meter 2 and the measuring base 1, and the fastening jackscrew 7 acts on the clamping sleeve 5 to fix the measuring meter 2 on the measuring base 1. Fastening jackscrew 7 can compress tightly or compress tightly the clamping sleeve 5 and then press from both sides tight measuring stick 2, and the setting of clamping sleeve 5 can play the effect that prevents fastening jackscrew 7 and damage measuring stick 2 to the measuring stick cover 22 and/or the measuring stick 21 of measuring stick 2 have been protected, the life of extension measuring stick 2.

The meter mounting hole 13 is a stepped hole, and an annular shoulder for positioning the clamping sleeve 5 is arranged in the meter mounting hole 13. The clamping sleeve 5 can be positioned, the clamping sleeve 5 is sleeved on the measuring rod sleeve 22 of the measuring instrument 2, and the position of the measuring instrument 2 can also be positioned through the positioning of the clamping sleeve 5.

The upper end of the compression spring 4 acts on the measuring rod sleeve 22 or the clamping sleeve 5 of the measuring gauge 2. The upper end of the compression spring 4 acts on the measuring rod sleeve 22 of the measuring gauge 2, or the clamping sleeve 5 can also act as a spring holder, and the upper end of the compression spring 4 can also act on the clamping sleeve 5.

The diameter of the shaft mounting hole 14 is larger than the outer diameter of the measuring shaft 3. The measuring shaft 3 is restrained on the measuring base 1 through the anti-dropping mechanism, the processing depth of the hole can be detected through the measuring shaft 3, and different measuring shafts 3 with different hole diameters can be replaced to detect.

The width of the limiting groove 31 is matched with the outer diameter of the limiting jackscrew 6, or the width of the limiting groove 31 is larger than the outer diameter of the limiting jackscrew 6. Spacing groove 31 and spacing jackscrew 6 cooperation will measure the restraint of axle 3 on measuring base 1, avoid measuring axle 3 and drop.

Still include standard ring 8, standard ring 8 is cyclic annular structure, be equipped with the standard hole on the standard ring 8. The calibration ring can calibrate the extension degree of the measuring shaft 3, the platform is used for placing the calibration ring, the measuring shaft 3 is used for measuring the thickness of the calibration ring, the reading of the dial indicator at the moment is recorded, the pointer of the dial indicator is reset to zero, the reference of the measuring depth is ensured according to the thickness of the standard ring 87, the calibrated measuring shaft 3 is inserted into a hole consistent with the thickness requirement of the calibration ring 7, the difference of the hole depth relative to the thickness of the standard ring 8 is judged according to the recorded reading and the difference of the pointer and the zero position of the dial indicator, the difference value is the difference of the hole depth relative to the standard ring 8, and the hole depth quality can be judged in time.

And a limiting shoulder used for positioning the measuring shaft 3 is further arranged in the axial through hole. The measuring shaft 3 can restrict the axial moving range of the measuring shaft 3 through the limiting groove 31, and certainly, the high position of the measuring shaft 3 can be limited through the limiting shoulder, so that the measuring shaft 3 is prevented from being excessively upwards damaged by the measuring meter 2.

The measuring meter 2 adopts a dial indicator. The dial indicator is a measuring tool for changing the linear displacement of the measuring rod 21 into the angular displacement of the pointer of the measuring instrument 2, is a high-precision comparison measuring tool, and can measure both relative and absolute values.

In the use, use the extension degree of visiting of calibration ring to measuring spindle 3 to calibrate, place the platform with the calibration ring before using, measuring spindle 3 measures the thickness of calibration ring, the reading of percentage table this moment of record, and zero the pointer of percentage table, according to the thickness of standard ring 8, ensure the benchmark of measurement depth, insert the measuring spindle 3 after the calibration downthehole unanimous with calibration ring thickness requirement, judge the difference of hole depth for the thickness of standard ring 8 according to the reading of record and the difference of percentage table pointer and zero-bit, the difference value is the difference of hole depth than standard ring 87. The measuring shaft 3 compresses the measuring rod of the upper dial indicator, and the depth of the hole is further determined according to the reading of the pointer, so that the depth measurement of different holes is realized.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The hole depth measuring device is characterized by comprising a measuring base (1), a measuring meter (2) arranged on the measuring base (1), a measuring shaft (3), a compression spring (4) arranged between the measuring meter (2) and the measuring shaft (3) and an anti-falling mechanism used for limiting the measuring shaft (3), wherein the measuring meter (2) is installed on the measuring base (1) through a fastening jackscrew (7), the compression spring (4) is sleeved on a measuring rod (21) of the measuring meter (2), the lower end of the compression spring acts on the measuring shaft (3), the anti-falling mechanism comprises a limiting jackscrew (6) and a limiting groove (31), an upper jackscrew hole (11) used for installing the fastening jackscrew (7), a lower jackscrew hole (12) used for installing the limiting jackscrew (6) and an axial through hole are formed in the measuring base (1), the axial through hole comprises a meter installing hole (13) used for installing the measuring meter (2) and an installing mounting hole (14) used for installing the measuring shaft (3), and the axial through hole (31) which is formed in the upper end of the limiting jackscrew (6) and the inner end of the limiting groove (31) passes through the upper jackscrew (12).

2. Hole depth measuring device according to claim 1, characterized in that a clamping sleeve (5) is further provided between the measuring gauge (2) and the measuring base (1), the fastening jackscrew (7) fixing the measuring gauge (2) on the measuring base (1) by acting on the clamping sleeve (5).

3. Hole depth measuring device according to claim 2, characterized in that the gauge mounting hole (13) is a stepped hole, inside the gauge mounting hole (13) there being an annular shoulder for positioning the clamping sleeve (5).

4. Hole depth measuring device according to claim 2, characterized in that the upper end of the compression spring (4) acts on the measuring rod sleeve (22) or the clamping sleeve (5) of the measuring gauge (2).

5. Hole depth measuring device according to any of claims 1-4, characterized in that the bore diameter of the shaft mounting hole (14) is larger than the outer diameter of the measuring shaft (3).

6. Hole depth measuring device according to claim 1, characterized in that the width of the stop groove (31) is adapted to the outer diameter of the stop jackscrew (6) or the width of the stop groove (31) is larger than the outer diameter of the stop jackscrew (6).

7. Hole depth measuring device according to any of claims 1 to 4, further comprising a standard ring (8), wherein the standard ring (8) is of an annular structure, and the standard ring (8) is provided with a standard hole.

8. Hole depth measuring device according to claim 1, characterized in that a stop shoulder for positioning the measuring shaft (3) is also provided in the axial through hole.

9. Hole depth measuring device according to claim 1, characterized in that the measuring gauge (2) is a dial gauge.