CN215338111U

CN215338111U - Manual quick two-point type inner hole measuring device

Info

Publication number: CN215338111U
Application number: CN202120992174.6U
Authority: CN
Inventors: 张守联; 张晨光; 张高超; 周常颜; 梁明辉; 陈敏; 张锋; 安丰军
Original assignee: Shandong Ruibin Precision Manufacturing Co ltd
Current assignee: Shandong Ruibin Precision Manufacturing Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-12-28
Anticipated expiration: 2031-05-10

Abstract

The utility model designs a manual quick two-point type inner hole measuring device which comprises a dial indicator, a straight pipe and a measuring head, wherein the dial indicator and the measuring head are respectively and fixedly installed at two ends of the straight pipe, an ejector rod of the dial indicator is positioned in the straight pipe, an adjusting rod and a movable ejector rod are sequentially arranged in the straight pipe, one end of the adjusting rod is contacted with the end part of the ejector rod of the dial indicator, the other end of the adjusting rod is contacted with one end of the movable ejector rod, a manual adjusting mechanism is arranged on the adjusting rod, and the manual adjusting mechanism can actively control the adjusting rod to move in the straight pipe along the length direction of the straight pipe. The utility model has the advantages that the movable measuring rod can be flexibly collected into the measuring head by operating the pull rod, the hole wall is prevented from being scratched, and the measuring head can be used for guiding, so that the inner diameter measuring efficiency is improved.

Description

Manual quick two-point type inner hole measuring device

Technical Field

The utility model belongs to the field of measuring devices, and particularly relates to a manual rapid two-point type inner hole measuring device.

Background

There are many methods for measuring the diameter of the inner hole in the mechanical industry, and the more common method with higher accuracy of indication is a comparative measurement method. The comparative measurements are commonly made with pneumatic gauges and internal diameter hundred (thousand) gauge measurements. For example, the chinese patent No. CN2700823 provides a lever type inside diameter universal meter, because the spring at the movable measuring rod is directly arranged between the movable measuring rod and the lever, when measuring the inside diameter, it is necessary to press the movable measuring rod into the hole wall side first to make the size of the lower end of the universal meter smaller than the hole diameter of the measured hole, and then, the fixed measuring rod end is screwed into the hole with the end point of the movable measuring rod as the center. Therefore, the hole wall is extruded in the measuring process, so that scratches are easily caused on the hole wall. When the discontinuous hole is measured, the movable measuring rod can be popped out from the support due to the notch arranged on the hole wall, the actions need to be repeated for a plurality of times, the operation is very troublesome, the measuring time in the whole measuring process is prolonged, and the use efficiency is low.

In addition, any guide mechanism or part for assisting the two measuring rods to position is not arranged, so that in the inner diameter measuring process, a measurer is required to hold the long measuring rod to be parallel to the central line of the measured hole, the two short measuring rods pass through the central point on the section of the measured hole, and the two end points are in contact with the hole wall, at the moment, the numerical value displayed by the dial indicator is the real numerical value of the aperture to be measured, so that when the existing inner diameter ten-thousandth gauge is used for measuring the inner diameter, the user is required to have certain technology and experience to be skilled in application of the instrument, but the measuring technology can be learned after a long period of time.

Disclosure of Invention

The utility model aims to provide and design a manual and rapid two-point inner hole measuring device aiming at the defect that the hole wall is easily scratched and damaged in the operation process of the conventional inner diameter measuring ten-thousandth meter, so that the lower end of the measuring device can be directly inserted into any measuring section of a hole to be measured, and the scratch on the hole wall of the hole to be measured is avoided.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a manual quick two point type hole measuring device, includes amesdial, straight tube and measuring head, amesdial and measuring head difference fixed mounting are at the both ends of straight tube, the ejector pin of amesdial is located the straight tube intraductally, the intraductal regulation pole and the movable ejector pin of still having set gradually of straight tube, the one end of adjusting the pole contacts with the ejector pin tip of amesdial, adjusts the other end of pole and the one end contact of movable ejector pin, be provided with manual adjustment mechanism on the regulation pole, manual adjustment mechanism can the active control adjust the pole and remove along straight tube length direction in the straight tube to can guarantee that the measuring staff of measuring head department can the manual control removal.

The utility model is further improved that a clamping part is arranged on the pipe wall of the straight pipe, a flange is arranged in the middle of the adjusting rod, and a measuring force spring is sleeved on the adjusting rod between the flange and the clamping part; the manual adjusting mechanism comprises a pull hole arranged on the pipe wall of the straight pipe, and the pull hole is opposite to the position of the flange on the adjusting rod; the manual adjusting mechanism further comprises a pull rod, a pull hook is arranged at the end portion of the pull rod, the pull hook penetrates through the pull hole and contacts with one side, which is not provided with a measuring force spring, of the flange, when the pull rod moves towards the direction close to the measuring force spring, the pull rod can push the adjusting rod to move towards the direction of the dial indicator, and a moving space is provided for the movable ejector rod.

The measuring head comprises a cylinder fixedly connected with a straight pipe, the axis of the cylinder is parallel to the axis of the straight pipe, a first mounting hole is formed in the cylinder, the axis of the first mounting hole and the axis of the straight pipe are in the same straight line, and the straight pipe and the movable ejector rod are located in the first mounting hole; a second mounting hole which vertically penetrates through the first mounting hole is formed in the cylinder, a fixed measuring rod is fixedly mounted at one end of the second mounting hole, and the top end of the fixed measuring rod is located outside the outer circle surface of the cylinder; a limiting piece is fixedly arranged at the other end of the second mounting hole, a movable measuring rod mounting hole which is communicated with the second mounting hole and the outside is arranged in the middle of the limiting piece, a movable measuring rod is movably arranged in the movable measuring rod mounting hole, a spring blocking part with the size larger than that of the movable measuring rod mounting hole is arranged at one end, close to the fixed measuring rod, of the movable measuring rod, and a movable measuring head spring is arranged between the spring blocking part and the end part of the limiting piece; between activity measuring staff and fixed measuring staff, it has the lever to articulate on the second mounting hole pore wall, the one end and the contact of activity measuring staff of lever, the another side and the contact of activity ejector pin of lever. After adjusting the pole and removing certain distance to the amesdial direction like this, can rely on the activity gauge head spring to move back the activity gauge rod and retract in the second mounting hole, avoid the measuring head to produce mar etc. to the hole wall inserting the in-process.

The utility model is further improved in that the outer parts of the straight pipe and the pull rod are wrapped with measuring handles, the upper end of the pull rod is provided with a pull rod push button, and the measuring handles are provided with operating holes matched with the pull rod push button. Therefore, the user can operate the measuring handle by holding the measuring handle, and the operation is convenient and comfortable.

The utility model is further improved in that a spring accommodating groove with an opening facing the pull rod is arranged on the inner side of the measuring handle, an auxiliary clamping part facing the spring accommodating groove is arranged in the middle of the pull rod, and a return spring is arranged between the auxiliary clamping part and the top surface of the spring accommodating groove, so that when measuring, a user only needs to loosen a pull rod push button to automatically push the movable measuring rod to be in contact with the hole wall, the user does not need to manually push the pull rod, and the measuring efficiency is improved.

The utility model is further improved in that a plastic dustproof sleeve is sleeved at the joint of the dial indicator and the straight pipe, and a clamp is arranged on the plastic dustproof sleeve. Thereby avoid the dust to get into the straight tube inside from the amesdial ejector pin with the straight tube junction, guarantee that the straight tube is inside clean.

The utility model is further improved in that the elastic force of the movable measuring head spring is smaller than that of the measuring force spring, so that the movable measuring rod can be ensured to be stretched out of the cylinder and to be contacted with the hole wall.

The utility model further improves that the outer cylindrical surface of the cylinder is plated with hard chromium, thereby improving the wear resistance of the cylinder.

The utility model further improves that the cylindricity of the outer cylindrical surface of the cylinder is less than 0.002 mm, and the single-side gap between the cylinder and the measured piece is 0.02 mm-0.04 mm, so that the guiding effect can be realized through the cylinder. Thereby reducing the measurement error and ensuring the accuracy of the whole measuring device.

The inner diameter measuring device has the beneficial effects that when the inner diameter measuring device is used, a user can guide the movable measuring rod and the fixed measuring rod to correct measuring positions through the cylinder, namely, the cylinder is inserted correctly, so that the coincidence of the center line of the cylinder and a measured hole is ensured, two short measuring rods are ensured to pass through the center point on the section of the measured hole, and two end points are in contact with the wall of the hole under the action of the measuring force spring, the measuring time is greatly shortened, and the measuring efficiency is improved.

And, when measuring, the user only needs to promote the pull rod button, just can stimulate the regulation pole to remove to the amesdial direction, make the tip of activity ejector pin and regulation pole separation, the regulation pole does not exert the force to the activity ejector pin, the rotatory thrust of activity measuring staff direction can not be applyed to the lever like this to the activity ejector pin, at this moment the activity measuring staff receives the power that removes to fixed measuring staff direction under the effect of activity gauge head spring, make whole activity measuring staff be located the second mounting hole, it can insert arbitrary measurement cross-section on being surveyed the hole this moment, and do not receive the influence in interrupted hole, can also avoid the activity measuring staff to produce mar etc. to the hole wall at the measuring head in-process of inserting.

In addition, the utility model has reliable design principle, simple structure and very wide application prospect.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a left side view of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the present invention in use.

Fig. 3 is a partially enlarged view of fig. 2 at B.

Fig. 4 is a cross-sectional view taken at a-a of fig. 1.

In the figure, 1, a dial indicator, 2, a clamp, 3, a measuring handle, 4, an adjusting rod, 5, a measuring force spring, 6, a straight pipe, 7, a cylinder, 8, a copper spiral pipe disc, 9, a connecting sleeve, 10, a second mounting hole, 11, a fixed measuring rod, 12, a movable rod, 13, a small ejector rod, 14, a draw hook, 15, a draw hole, 16, a reset spring, 17, a draw rod push button, 18, a pull rod, 19, a clamping knob, 20, a measuring handle A, 21, a measuring handle B, 22, a measuring head, 23, a measuring head cover, 24, a movable ejector rod, 25, a limiting piece, 26, a movable measuring rod, 27, a movable measuring head spring, 28, a lever, 29, a clamping piece, 30, a fastening bolt, 31, a lever pin, 32, a measured piece and 33, a plastic dust-proof sleeve.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following explains key terms appearing in the present invention.

As shown in fig. 1 to 4, the present invention provides a manual fast two-point type inner hole measuring device, which comprises a dial indicator 1, a straight pipe 6 and a measuring head 22. The dial indicator 1 and the measuring head 22 are respectively fixedly installed at two ends of the straight pipe 6, and the ejector rod of the dial indicator 1 is located in the straight pipe 6. Further, in order to avoid dust from entering the straight pipe 6 from the joint of the dial indicator 1 and the straight pipe 6, a plastic dustproof sleeve 33 is sleeved outside the ejector rod of the dial indicator 1 above the straight pipe 6, and the plastic dustproof sleeve 33 is clamped and fixed through a clamp 2 and a clamping knob 19 which are arranged outside the plastic dustproof sleeve 33. An adjusting rod 4 and a movable ejector rod 24 are sequentially arranged in the straight pipe 6, one end of the adjusting rod 4 is in contact with the end portion of the ejector rod of the dial indicator 1, and the other end of the adjusting rod 4 is in contact with one end of the movable ejector rod 24. The pipe wall of the straight pipe 6 is provided with a clamping part, and the middle part of the adjusting rod 4 is provided with a flange. Between flange and clamping part, adjusting lever 4 is gone up the cover and is established measurement power spring 5, measurement power spring 5 realizes deformation through the relative distance between flange and the clamping part. The adjusting rod 4 is provided with a manual adjusting mechanism, and the manual adjusting mechanism can actively control the adjusting rod 4 to move in the straight pipe 6 along the length direction of the straight pipe 6.

The manual adjusting mechanism comprises a pull hole 15 arranged on the pipe wall of the straight pipe 6, and the pull hole 15 is opposite to the position of the flange on the adjusting rod 4. The manual adjusting mechanism further comprises a pull rod 18, and a drag hook 14 is arranged at the end part of the pull rod 18. The draw hook 14 passes through the draw hole 15 and can be contacted with the side of the flange where the measuring force spring 5 is not arranged, and when the pull rod 18 moves towards the direction close to the measuring force spring 5, the pull rod 18 can push the adjusting rod 4 to move towards the direction of the dial indicator 1. In addition, in order to conveniently fix and operate the pull rod 18, the measuring handle 3 is arranged outside the straight pipe 6, the measuring handle 3 comprises a measuring handle A20 and a measuring handle B21, the measuring handle A20 and the measuring handle B21 are connected together through fasteners, and the pull rod 18 and the straight pipe 6 are wrapped together. In addition, the upper end of the pull rod 18 is provided with a pull rod push button 17 which is convenient to operate, and the measuring handle 3 is provided with an operation hole which is matched with the pull rod push button 17 in size, so that the pull rod push button 17 can move in the operation hole. Further, it is preferable that an auxiliary locking portion is provided at a middle portion of the pull rod 18, a spring housing groove opposed to the auxiliary locking portion is provided on the measuring handle 3, the auxiliary locking portion is located in the spring housing groove, and a return spring 16 is provided between the auxiliary locking portion and a top surface of the spring housing groove. This allows the pull rod 18 to be automatically reset after the user releases the pull rod push button 17.

In addition, the measuring head 22 includes the measuring body fixedly connected with the straight tube 6, the measuring body preferably adopts the cylinder 7, and the axis of the cylinder 7 is parallel to the axis of the straight tube 6 or both are the same straight line, be provided with a first mounting hole on the cylinder 7, just the axis of the first mounting hole is the same with the axis of the straight tube 6, the tip of the straight tube 6 is located in the first mounting hole. Further, the straight tube 6 and the cylinder 7 are fixedly connected together through a connecting sleeve 9, and the movable ejector rod 24 is positioned in the connecting sleeve 9. Further, the movable top bar 24 preferably comprises a movable rod 12 and a small top bar 13, wherein the movable rod 12 is installed at one end of the connecting sleeve 9 far away from the straight pipe 6 and can move in the connecting sleeve 9. The other end at adapter sleeve 9 fixed mounting copper solenoid dish 8, the middle part of copper solenoid dish 8 is provided with the connecting hole of intercommunication adapter sleeve 9 inner chamber and straight tube 6 inner chamber, little ejector pin 13 sets up in the connecting hole, still is provided with the clearance between little ejector pin 13 and the connecting hole, and the both ends of little ejector pin 13 respectively with the tip of movable rod 12 and the tip contact of adjusting pole 4. In order to prevent the adjustment rod 4 from moving excessively in the direction of the measurement head 22, a locking member 29 having a size larger than that of the connection hole is fixedly attached to the upper portion of the small push rod 13 between the copper solenoid disk 8 and the adjustment rod 4, and a nut is preferably used as the locking member 29.

And a second mounting hole 10 vertically penetrating through the first mounting hole is formed in the cylinder 7, and the axis of the second mounting hole 10 is vertically intersected with the axis of the cylinder 7. A fixed measuring rod 11 is fixedly installed at one end of the second installation hole 10, a measuring head cover 23 is preferably arranged on the outer side of the fixed measuring rod 11, the top end of the fixed measuring rod 11 is located outside the outer cylindrical surface of the cylinder 7, and the distance between the top end of the fixed measuring rod 11 and the outer cylindrical surface of the cylinder 7 is preferably 0.05 mm; the other end fixed mounting of second mounting hole 10 has locating part 25, the middle part of locating part 25 is provided with the activity measuring staff mounting hole that communicates second mounting hole 10 and external world, is provided with the activity measuring staff 26 that can freely reciprocate in the activity measuring staff mounting hole, prefers to set up in the outside of activity measuring staff 26 and surveys the lid 23, the one end that is close to fixed measuring staff 11 on the activity measuring staff 26 is provided with the spring card and holds the portion that the size is greater than the activity measuring staff mounting hole, is provided with the size between spring card holds portion and locating part 25 tip and is less than the activity gauge head spring 27 of spring card and holds the portion, activity gauge head spring 27 is preferred to be established on activity measuring staff 26, just activity gauge head spring 27's elasticity is far less than the elasticity of measuring force spring 5. In addition, the movable measuring head spring 27 ensures that the position of one end of the movable measuring head spring 27 is unchanged through the end part of the limiting part 25, and when the movable measuring head spring 27 is in a relaxed state, the movable measuring rod 26 is completely retracted into the second mounting hole 10; when the movable probe spring 27 is in a compressed state, the measuring end of the movable measuring rod 26 is located outside the cylinder 7. Between the movable measuring bar 26 and the fixed measuring bar 11, a lever 28 is hinged on the wall of the second mounting hole 10. Further, an auxiliary mounting hole penetrating perpendicularly to the second mounting hole 10 may be formed in the cylinder 7, and then a fastening bolt 30, a lever pin 31 and a fastening bolt 30 are sequentially installed in the auxiliary mounting hole, and the lever 28 is hinged to the lever pin 31 and supports the lever pin 31 via the fastening bolts 30 at both sides. In addition, the lever 28 is a right-angled lever, and one side of the lever 28 can contact with one end of the movable measuring bar 26, and the other side of the lever 28 can contact with the end of the movable push rod 24.

The cylinder 7 is preferably made of aluminum profile to reduce weight; the outer cylindrical surface of the cylinder 7 is plated with hard chromium to ensure the wear resistance; in addition, the cylindricity of the outer cylindrical surface of the cylinder 7 is ensured to be within 0.002 mm so as to ensure the measurement accuracy; the length of the cylinder 7 is greater than or equal to the diameter of the measured hole, and the unilateral clearance between the cylinder 7 and the measured piece 32 is preferably 0.02 mm-0.04 mm.

Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or alterations to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and substance of the present invention, and such modifications or alterations are intended to be within the scope of the present invention; any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and all such changes or substitutions are included in the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a manual quick two point type hole measuring device, its characterized in that, includes amesdial (1), straight tube (6) and measuring head (22), amesdial (1) and measuring head (22) are fixed mounting respectively at the both ends of straight tube (6), the ejector pin of amesdial (1) is located straight tube (6) intraductally, the intraductal regulation pole (4) and the movable ejector pin (24) of still having set gradually of straight tube (6), the one end of adjusting pole (4) and the ejector pin tip contact of amesdial (1), the other end of adjusting pole (4) and the one end contact of movable ejector pin (24), be provided with manual adjustment mechanism on adjusting pole (4), manual adjustment mechanism can the initiative control adjust pole (4) and move along straight tube (6) length direction in straight tube (6).

2. A manual rapid two-point inner hole measuring device according to claim 1, characterized in that the tube wall of the straight tube (6) is provided with a clamping part, the middle part of the adjusting rod (4) is provided with a flange, and the adjusting rod (4) is sleeved with a measuring force spring (5) between the flange and the clamping part; the manual adjusting mechanism comprises a pull hole (15) arranged on the pipe wall of the straight pipe (6), and the pull hole (15) is opposite to the position of a flange on the adjusting rod (4); the manual adjusting mechanism further comprises a pull rod (18), a draw hook (14) is arranged at the end portion of the pull rod (18), the draw hook (14) penetrates through the draw hole (15) and is in contact with one side, which is not provided with the measuring force spring (5), of the flange, and when the pull rod (18) moves towards the measuring force spring (5), the pull rod (18) can push the adjusting rod (4) to move towards the direction of the dial indicator (1).

3. A manual quick two-point inner hole measuring device according to claim 1 or 2, wherein the measuring head (22) comprises a cylinder (7) fixedly connected with the straight tube (6), the axis of the cylinder (7) is parallel to the axis of the straight tube (6), a first mounting hole is arranged on the cylinder (7), the axis of the first mounting hole is in the same straight line with the axis of the straight tube (6), and the straight tube (6) and the movable ejector rod (24) are positioned in the first mounting hole; a second mounting hole (10) which vertically penetrates through the first mounting hole is formed in the cylinder (7), a fixed measuring rod (11) is fixedly mounted at one end of the second mounting hole (10), and the top end of the fixed measuring rod (11) is located outside the outer circle surface of the cylinder (7); a limiting piece (25) is fixedly installed at the other end of the second installation hole (10), a movable measuring rod installation hole which is communicated with the second installation hole (10) and the outside is formed in the middle of the limiting piece (25), a movable measuring rod (26) is movably installed in the movable measuring rod installation hole, a spring clamping portion with the size larger than that of the movable measuring rod installation hole is arranged at one end, close to the fixed measuring rod (11), of the movable measuring rod (26), and a movable measuring head spring (27) is arranged between the spring clamping portion and the end portion of the limiting piece (25); between activity measuring staff (26) and fixed measuring staff (11), it has lever (28) to articulate on second mounting hole (10) pore wall, the one end and the contact of activity measuring staff (26) of lever (28), the another side and the contact of activity ejector pin (24) of lever (28).

4. A manual quick two-point inner hole measuring device according to claim 2, wherein the measuring handle (3) is wrapped outside the straight pipe (6) and the pull rod (18), the pull rod push button (17) is arranged at the upper end of the pull rod (18), and the measuring handle (3) is provided with an operating hole matched with the pull rod push button (17).

5. A manual rapid two-point internal bore measuring device according to claim 4, characterized in that the inner side of the measuring handle (3) is provided with a spring receiving groove opening towards the pull rod (18), the middle part of the pull rod (18) is provided with an auxiliary stop towards the spring receiving groove, and a return spring (16) is arranged between the auxiliary stop and the top surface of the spring receiving groove.

6. A manual rapid two-point inner hole measuring device according to claim 1 or 2, characterized in that a plastic dustproof sleeve (33) is sleeved outside the straight pipe (6) at the joint of the dial indicator (1) and the straight pipe (6), and the clamp (2) is installed on the plastic dustproof sleeve (33).

7. A manual rapid two-point internal bore measuring device according to claim 3, characterized in that the spring force of the movable probe spring (27) is smaller than the spring force of the measuring force spring (5).

8. A manual rapid two-point internal bore measuring device according to claim 3, characterized in that the outer cylindrical surface of the cylinder (7) is hard-chrome plated.

9. A manual rapid two-point inner hole measuring device according to claim 8, characterized in that the cylindricity of the outer cylindrical surface of the cylinder (7) is less than 0.002 mm, and the single-side gap between the cylinder (7) and the measured piece (32) is 0.02 mm to 0.04 mm.