CN211527254U - Measuring device - Google Patents

Measuring device Download PDF

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Publication number
CN211527254U
CN211527254U CN202020497784.4U CN202020497784U CN211527254U CN 211527254 U CN211527254 U CN 211527254U CN 202020497784 U CN202020497784 U CN 202020497784U CN 211527254 U CN211527254 U CN 211527254U
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CN
China
Prior art keywords
measuring
positioning frame
central axis
sleeve
probe rod
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Active
Application number
CN202020497784.4U
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Chinese (zh)
Inventor
李辰
胡玉龙
杨鑫
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Beijing Foton Cummins Engine Co Ltd
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Beijing Foton Cummins Engine Co Ltd
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Priority to CN202020497784.4U priority Critical patent/CN211527254U/en
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Abstract

The utility model discloses a measuring device, include: the positioning frame is used for clamping a shaft part or a reference shaft, and the central axis of the positioning frame penetrates through the axis of the shaft part or the reference shaft; the measuring assembly penetrates through the positioning frame and comprises a probe rod and a measuring meter connected with the probe rod, the free end of the probe rod is used for abutting against the surface to be measured, and the measuring meter is used for displaying the size data of the surface to be measured according to the movement of the probe rod; the fixing piece is fixed on the positioning frame, the fixing piece is sleeved outside the probe rod, and the probe rod can freely move along the central axis of the fixing piece relative to the fixing piece; the measuring assembly is arranged along the central axis direction of the positioning frame and used for measuring roundness; or the measuring assembly is arranged along the direction perpendicular to the central axis of the positioning frame and used for measuring the end face runout.

Description

Measuring device
Technical Field
The utility model relates to a size measurement technical field especially relates to a measuring device.
Background
In the process of machining metal mechanical parts, the diameter size and roundness parameters of shaft parts are the key characteristics of the parts, and whether the parameters meet the requirements of drawings or not directly influences the assembly quality. At present, the common roundness measurement mode in a factory is mainly to measure a plurality of positions of an outer diameter by using a caliper or a micrometer, and then to estimate roundness parameters of parts by formula calculation.
But for shaft parts with higher processing precision requirements, such as engine crankshafts, the roundness tolerance of the shaft parts cannot be larger than 0.03mm, and obviously, calipers and micrometers cannot meet the precision requirements. In this case, a high-precision three-coordinate measuring machine is required to perform scanning measurement of the roundness of the shaft component. However, the coordinate system of the part needs to be established and the measurement is required to be performed at a very low measurement speed by the three-coordinate measuring machine, otherwise, the measuring needle and the equipment measuring head are damaged, and the measurement efficiency of the part is seriously affected.
In addition, the roundness parameters of the shaft parts are closely related to the end face run-out, but the end face run-out needs additional equipment for special measurement, so that the equipment cost and the measurement difficulty are undoubtedly increased.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a measuring device that measurement accuracy is high, simple structure, convenient operation can effectively improve the measurement of efficiency of part when guaranteeing measurement accuracy.
The utility model provides a measuring device, include: the positioning frame is used for clamping a shaft part or a reference shaft, and the central axis of the positioning frame penetrates through the axis of the shaft part or the reference shaft;
the measuring assembly penetrates through the positioning frame and comprises a probe rod and a measuring meter connected with the probe rod, the free end of the probe rod is used for abutting against the surface to be measured, and the measuring meter is used for displaying the size data of the surface to be measured according to the movement of the probe rod;
the fixing piece is fixed on the positioning frame, the fixing piece is sleeved outside the probe rod, and the probe rod can freely move along the central axis of the fixing piece relative to the fixing piece;
the measuring assembly is arranged along the central axis direction of the positioning frame and used for measuring roundness; or the measuring assembly is arranged along the direction perpendicular to the central axis of the positioning frame and used for measuring the end face runout.
Further, when the measuring component is along when the central axis direction of locating rack sets up, the mounting is including wearing to establish and fixing the sleeve on locating rack top, telescopic central axis with the central axis of locating rack coincides mutually.
Furthermore, a through hole penetrating through the sleeve is formed in the top of the positioning frame, one end of the sleeve is fixedly connected with the dial plate of the measuring meter, and the other end of the sleeve penetrates through the through hole and extends to be close to the end of the probe rod.
Furthermore, a locking nut capable of fixing the sleeve on the positioning frame is arranged on the side wall of the through hole, and the installation direction of the locking nut is perpendicular to the extending direction of the sleeve.
Further, when the measuring component is arranged along the direction perpendicular to the central axis of the positioning frame, the fixing part comprises a sleeve which is arranged on the top of the positioning frame in a penetrating mode and fixed, and the central axis of the sleeve is perpendicular to the central axis of the positioning frame.
Further, the positioning frame is of an axisymmetric structure and comprises a point and a line structure which can be in tangential contact with the side wall of the shaft part or the reference shaft.
Furthermore, the free end of the probe rod is of a hemispherical structure, and the bottommost end of the hemispherical structure is in tangential contact with the surface to be measured.
Further, the measuring gauge is a mechanical dial gauge or an electronic dial gauge with an automatic recording function.
The utility model provides a measuring device, the locating rack that has from centering function through setting up can effectively fix a position axle type part or basic shaft, makes the central axis of locating rack pass axle type part or basic shaft, satisfies the operation requirement when measuring different dimensional parameter, and the locating rack can pinpoint the surface that awaits measuring of axle type part or basic shaft, effectively improves measured accurate nature.
Through the measuring assembly and the fixing piece sleeved outside the probe rod of the measuring assembly, the probe rod can freely move relative to the fixing piece and along the central axis of the fixing piece, and the measuring meter can display the size data of the surface to be measured. On the one hand, the fixing piece effectively protects the probe rod, and on the other hand, the free end of the probe rod abutting against the surface to be measured can feed back the movement of the probe rod on the surface to be measured to the measuring meter in real time, so that the truth and accuracy of measured data are guaranteed.
The utility model provides a measuring device, simple structure, convenient operation only needs rotational positioning frame can realize fast that the measuring tape is to roundness parameter or the measurement of face runout in the measurement process, has effectively improved the measurement efficiency of part under the prerequisite of guaranteeing measurement accuracy.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of the structure of a measuring apparatus in example 1;
FIG. 2 is a schematic view of a measuring device in use for measuring the roundness of a radial section of a shaft part;
FIG. 3 is a schematic view of the measuring apparatus in example 2 at zero setting;
fig. 4 is a schematic view of the measuring apparatus in a state of use for measuring end run-out of a reference shaft mounting plane.
In the figure: 1-a positioning frame; 11-a leg; 2-a sleeve; 3-a measuring meter; 4-a hand-held portion; 5-locking the nut; 6-probe rod; 7-shaft parts; 71-a side wall; 8-a reference axis; 9-standard workpiece.
In the drawings, like parts are designated with like reference numerals, and the drawings are not to scale.
Detailed Description
For the sake of clarity, the present invention will be described with reference to the following embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The utility model provides a can carry out measuring device to the circularity parameter of counter shaft class part or to the end face runout of benchmark axle, include: the positioning frame is used for clamping the shaft parts or the reference shaft, and the central axis of the positioning frame penetrates through the axes of the shaft parts or the reference shaft;
the measuring assembly penetrates through the positioning frame and comprises a probe rod and a measuring meter connected with the probe rod, the free end of the probe rod is used for abutting against the surface to be measured, and the measuring meter is used for displaying the size data of the surface to be measured according to the movement of the probe rod; the surface to be measured is a radial section of the shaft part or an installation plane connected with the end face of the reference shaft, and the free end of the probe rod abuts against the radial section or the installation plane during measurement;
the fixing piece is fixed on the positioning frame, the fixing piece is sleeved outside the probe rod, and the probe rod can freely move along the central axis of the fixing piece relative to the fixing piece; specifically, the fixing part is a sleeve which is arranged in a penetrating manner and fixed at the top of the positioning frame, the probe rod is coaxially arranged in the sleeve and can freely move relative to the sleeve and along the central axis of the sleeve, so that the displacement of the free end of the probe rod is displayed on a measuring meter, and the roundness of a radial section or the end face runout of an installation plane is further fed back;
when the sleeve and the probe rod are arranged along the central axis direction of the positioning frame, the free end of the probe rod is abutted against the side wall of the shaft part and is used for measuring the roundness of the radial section; or when the sleeve and the probe rod are arranged along the direction perpendicular to the central axis of the positioning frame, the free end of the probe rod is abutted against the mounting plane and is used for measuring the end face runout of the mounting plane.
The roundness measurement of a radial cross section and the face runout of a mounting plane are explained below in the form of specific embodiments.
Example 1
As shown in fig. 1-2, the utility model provides a measuring device for measure the circularity of 7 radial cross sections of axle type part, including setting up locating rack 1 that is used for locating 7 radial cross sections of axle type part on axle type part 7 in the card, the central axis of locating rack 1 passes the axle center of axle type part 7, the mounting is including alternate sleeve 2 fixed on locating rack 1, sleeve 2 sets up along the central axis direction of locating rack 1, and sleeve 2 the central axis coincides mutually with the central axis of locating rack 1, the central axis of sleeve 2 is through the centre of a circle of radial cross section promptly;
the measuring component in the embodiment comprises a probe rod 6 which is arranged on the positioning frame 1 in a penetrating mode and inserted into the sleeve 2, one end of the probe rod 6 is arranged on the measuring meter 3, the other end of the probe rod extends along the central axis of the sleeve 2, and the extending tail end of the probe rod, namely the free end of the probe rod, abuts against the radial cross section to form a measuring contact. The measuring gauge 3 in this embodiment is a mechanical dial gauge, and the mechanical dial gauge is configured to measure the maximum radial displacement on the radial cross section when the free end rotates along the circumferential direction of the side wall 71 of the shaft part 7, and feed back the roundness of the shaft part 7.
The utility model provides a roundness measuring device simple structure, convenient operation. The locating rack 1 is a V-shaped rack comprising two supporting legs, a sleeve 2 extending along the central axis of the V-shaped rack and a probe rod 6 coaxially arranged inside the sleeve 2, so that the probe rod 6, a free end and the circle center of a radial section to be measured are positioned on the same straight line, and the accuracy and the reality of the measured value are guaranteed. The landing leg 11 of V type frame constitutes two setpoint to the radial cross section that awaits measuring through two lines tangent with the lateral wall 71 of axle type part 7, only needs to rotate V type frame when measuring, measures the radial displacement of contact on the radial cross section that awaits measuring through probe rod 6, feeds back axle type part 7 radial cross section's circularity parameter, and whole measuring process convenient and fast has effectively improved the measurement of efficiency of part.
The V type frame in this embodiment is the axisymmetric structure, including two landing legs 11 that can be tangent with lateral wall 71, and two landing legs 11's length is the same, has constituted the isosceles structure of V type frame, and this kind of setting mode can guarantee the effective contact of axle type part 7 external diameter and landing leg 11, makes the radial cross section location that awaits measuring in the open slot of V type frame, guarantees that the extending direction of probe rod 6 passes radial cross section's centre of a circle to ensure measuring result's accuracy. It should be noted that the supporting leg 11 in the present invention has a certain thickness, when the shaft part 7 is clamped, the manner of tangential contact between the supporting leg 11 and the side wall 71 of the shaft part 7 is a line contact manner extending along the thickness direction of the supporting leg, and if the supporting leg is cylindrical or cylindrical, the manner of tangential contact between the supporting leg and the side wall of the shaft part is a point contact manner; moreover, if the supporting legs comprise two curved surface grooves matched with the side walls of the shaft parts in shape, the contact mode between the two curved surface grooves can also be a surface contact mode, the mode of the positioning frame can be adjusted according to specific actual needs, but the functional requirement that the positioning frame is in an axisymmetric structure needs to be met, and the central axis of the positioning frame is ensured to penetrate through the axis of the shaft parts.
The circumferential rotation of the V-shaped frame is completed by a handheld part 4 fixedly mounted at the top of the V-shaped frame during measurement, the handheld part 4 is a columnar structure with a hollow structure and is arranged at the center of the top of the V-shaped frame, and the axis of the handheld part 4 is overlapped with the central axis of the V-shaped frame.
The top of the V-shaped frame is provided with a through hole for the sleeve 2 to penetrate through, one end of the sleeve 2 is connected with the dial plate of the mechanical dial indicator, and the other end of the sleeve 2 penetrates through the through hole to extend to be close to the end part of the probe rod 6 and is close to the side wall 71 of the shaft part 7. The sleeve 2 is arranged to penetrate through the through hole and then fixed on the V-shaped frame, and the handheld part 4 of the columnar structure and the through hole are arranged concentrically. The sleeve 2 is not in direct contact with the shaft part 7 during measurement, and the main function of the sleeve is to effectively protect the measuring probe rod 6. In order to meet the measurement requirements of shaft parts 7 with different sizes, the sleeve 2 is telescopically adjusted in the installation direction, a locking nut 5 capable of fixing the sleeve 2 on a V-shaped frame is arranged on the side wall of the through hole, the telescopic length of the sleeve 2 on the inner side of an open slot can be adjusted through the locking nut 5, the use flexibility of the roundness measuring device is improved, and the measurement range of the shaft parts 7 is widened.
In this embodiment, the free end of the probe 6 is a hemisphere, the bottom end of the hemisphere is in tangential contact with the sidewall 71 of the radial cross section to be measured, the free end protrudes out of the extending end of the sleeve 2, and the diameter of the free end is smaller than the inner diameter of the sleeve 2. This kind of setting mode can satisfy the real-time displacement change of free end when measuring, and the form of tangent contact has improved measuring smooth and easy degree, and the diameter of free end is less than sleeve 2's internal diameter and can guarantees probe rod 6 at the inside small displacement of sleeve 2, thereby prevents that probe rod 6 from appearing blocking and duning and influencing measuring result.
Example 2
As shown in fig. 3-4, the utility model provides a measuring device for measure the end face run-out of basic shaft 8, establish the locating rack 1 that is used for fixing a position basic shaft 8 on basic shaft 8 including the card, the central axis of locating rack 1 passes the axle center of basic shaft 8, and the mounting is fixed at the sleeve 2 at locating rack 1 top including alternating, the central axis perpendicular to locating rack 1's the central axis of sleeve 2.
The measuring component in this embodiment includes to wear to establish on locating rack 1 and alternate at the inside probe rod of sleeve 2, and the one end of probe rod is installed on measurement meter 3, and the other end extends along the central axis of sleeve 2, and its extension end is that the free end conflicts constitutes the measurement contact on the mounting plane of 8 tip of reference shaft promptly.
The end face of the reference shaft 8 in this embodiment is a standard component with qualified roundness, and it should be noted that the end face of the reference shaft 8 is used for limiting, so that the free end of the probe rod needs to be set to zero on the platform before measurement. Referring to fig. 3, the zeroing process is performed on the master workpiece 9, and the master workpiece 9 includes a flat surface of absolute flatness. After the measurement assembly is set to zero, the positioning frame provided with the measurement assembly and the fixing piece is placed on the installation plane to measure end face runout. Through the displacement of the free end of the probe rod on the mounting plane, the dimensional data displayed on the measuring meter is used for feeding back the end face runout of the mounting plane.
The form and function of the positioning frame and the sleeve in this embodiment are the same as those in embodiment 1, and are not described again.
It is important to point out, the utility model provides a detection device can measure the face through with mounting and measuring component simple position transform on the locating rack and beat, kills two birds with one stone. Has the characteristics of low cost, simple structure and convenient operation. The measuring efficiency of the measuring device can be greatly improved, and various requirements of workpiece measurement are met.
Need explain have, the utility model provides a measuring gauge is except adopting mechanical amesdial, still can adopt from the electron amesdial of taking the record function for the record free end is along radial cross-section or the biggest fluctuation volume on mounting surface, records extremely poor numerical value promptly, with this circular degree parameter of feedback axle class part or mounting surface's end face is beated. When the locating rack is rotated in the measurement, certain force needs to be applied to ensure that the locating rack cannot be separated from the surface of the part.
Finally, it is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as the protection scope of the invention.

Claims (8)

1. A measuring device, comprising: the positioning frame is used for clamping a shaft part or a reference shaft, and the central axis of the positioning frame penetrates through the axis of the shaft part or the reference shaft;
the measuring assembly penetrates through the positioning frame and comprises a probe rod and a measuring meter connected with the probe rod, the free end of the probe rod is used for abutting against the surface to be measured, and the measuring meter is used for displaying the size data of the surface to be measured according to the movement of the probe rod;
the fixing piece is fixed on the positioning frame, the fixing piece is sleeved outside the probe rod, and the probe rod can freely move along the central axis of the fixing piece relative to the fixing piece;
the measuring assembly is arranged along the central axis direction of the positioning frame and used for measuring roundness; or the measuring assembly is arranged along the direction perpendicular to the central axis of the positioning frame and used for measuring the end face runout.
2. The measuring device of claim 1, wherein when the measuring assembly is disposed along the central axis of the positioning frame, the fixing member comprises a sleeve penetrating and fixed at the top end of the positioning frame, and the central axis of the sleeve coincides with the central axis of the positioning frame.
3. The measuring device as claimed in claim 2, wherein a through hole is formed at the top of the positioning frame and penetrates through the sleeve, one end of the sleeve is fixedly connected with the dial plate of the measuring meter, and the other end of the sleeve penetrates through the through hole and extends to be close to the end of the probe rod.
4. The measuring device as claimed in claim 3, wherein a locking nut for fixing the sleeve on the positioning frame is arranged on a side wall of the through hole, and the installation direction of the locking nut is perpendicular to the extending direction of the sleeve.
5. The measuring device of claim 1, wherein when the measuring assembly is disposed in a direction perpendicular to the central axis of the positioning frame, the fixing member comprises a sleeve penetrating and fixed on the top of the positioning frame, and the central axis of the sleeve is perpendicular to the central axis of the positioning frame.
6. A measuring device according to any one of claims 1-5, characterized in that the positioning frame is an axisymmetric structure comprising a point, line structure capable of tangential contact with the side walls of the shaft part or the reference axis.
7. A measuring device according to any of claims 1-5, wherein the free end of the probe is a hemispherical structure, the lowermost end of which is in tangential contact with the surface to be measured.
8. The measuring device according to any one of claims 1 to 5, wherein the measuring gauge is a mechanical dial gauge or an electronic dial gauge with an automatic recording function.
CN202020497784.4U 2020-04-08 2020-04-08 Measuring device Active CN211527254U (en)

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Application Number Priority Date Filing Date Title
CN202020497784.4U CN211527254U (en) 2020-04-08 2020-04-08 Measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020497784.4U CN211527254U (en) 2020-04-08 2020-04-08 Measuring device

Publications (1)

Publication Number Publication Date
CN211527254U true CN211527254U (en) 2020-09-18

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Application Number Title Priority Date Filing Date
CN202020497784.4U Active CN211527254U (en) 2020-04-08 2020-04-08 Measuring device

Country Status (1)

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CN (1) CN211527254U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432509A (en) * 2021-06-26 2021-09-24 长春市春求科技开发有限公司 R ruler and measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432509A (en) * 2021-06-26 2021-09-24 长春市春求科技开发有限公司 R ruler and measuring method

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