TWI445922B - Roundness measuring device - Google Patents

Description

Roundness detecting device

The present invention relates to a roundness detecting device.

At present, the measurement of the surface shape error of a circular workpiece such as roundness (also called roundness) is generally required to be measured by a large-scale precision roundness meter. However, the large-scale precision roundness meter has a complicated structure and high cost, and is not suitable for a large number of configurations.

In view of the above, it is necessary to provide a roundness detecting device which is low in cost and simple in structure.

A roundness detecting device includes a base, a rotating shaft, a micrometer, and a positioning device, wherein the rotating shaft is rotatably disposed on the base, and the micrometer is disposed corresponding to the rotating shaft The base is spaced apart from the rotating shaft by a distance, and the positioning device is disposed on the rotating shaft to fix a workpiece to be detected.

Compared with the prior art, the roundness detecting device fixes the workpiece to be inspected by using a positioning device mounted on a rotating shaft, and detects the roundness of the workpiece to be detected through a micrometer corresponding to the rotating shaft, and has a simple structure. ,low cost.

100‧‧‧ roundness detection device

110‧‧‧Base

112‧‧‧floor

114‧‧‧ side wall

116‧‧‧ accommodating space

112a‧‧‧Axis hole

114a‧‧‧through hole

120‧‧‧ shaft

130‧‧‧Micrometer

132‧‧‧Reading meter

134‧‧‧ rod body

136‧‧‧ probe

140‧‧‧ Positioning device

142‧‧ ‧ spring

144‧‧‧ fixed rod

146‧‧‧Locating pin

200‧‧‧Workpiece to be inspected

1 is a perspective view of a roundness detecting device of the present invention; FIG. 2 is a cross-sectional view taken along line II-II of the roundness detecting device of FIG. 1; and FIG. 3 is a view showing a state of use of the roundness detecting device of FIG. 1.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which shows a roundness detecting device 100 according to a preferred embodiment of the present invention. The roundness detecting device 100 includes a base 110, a rotating shaft 120, a micrometer 130, and a positioning device 140. The rotating shaft 120 is rotatably disposed on the base 110. The micrometer 130 is disposed on the base 110 corresponding to the rotating shaft 120 and spaced apart from the rotating shaft 120 by a certain distance. The positioning device 140 is disposed on the rotating shaft 120 for fixing a workpiece to be inspected.

The base 110 includes a bottom plate 112 and a side wall 114 extending from an edge of the bottom plate 112 in a direction perpendicular to the bottom plate 112. In this embodiment, the bottom plate 112 is circular, and the side wall 114 forms a circular receiving space 116 around the bottom plate 112. A shaft hole 112a is disposed at a center of the bottom plate 112 for receiving the rotating shaft 120 therein. A through hole 114a perpendicular to the sidewall 114 and extending through the sidewall 114 is defined in the sidewall 114. The through hole 114a is used to set the micrometer 130.

One end of the rotating shaft 120 is rotatably disposed in the shaft hole 112a of the base 110 for driving the workpiece to be detected to rotate by the positioning device 140. It can be understood that, in order to reduce the influence of the friction between the rotating shaft 120 and the sidewall of the shaft hole 112a on the measurement result, a rolling bearing (not shown) may be disposed between the rotating shaft 120 and the sidewall of the shaft hole 112a. .

The micrometer 130 is disposed on the sidewall 114 of the susceptor 110 and includes a reading meter 132, a rod 134 and a probe 136. The meter 132 is used to read the value of the surface change of the workpiece to be inspected, and the meter 132 is provided with a metering device. The rod body 134 is connected to the reading meter 132 and is fixed in the through hole 114a. On the side wall 114 of the base 110, the rod 134 is a hollow rod. The probe 136 is coupled to the metering device in the meter 132 and extends from the end of the rod 134. The probe 136 directly abuts against the surface of the workpiece to be inspected to detect the surface of the workpiece to be inspected. The change is transmitted directly to the meter 132 by the meter 132 to convert it to a particular change value for presentation to the user.

The positioning device 140 is disposed at an end of the rotating shaft 120 adjacent to the base 110 for supporting a workpiece to be inspected. Referring to FIGS. 1 and 2 , in the present embodiment, the positioning device 140 includes a plurality of springs 142 and a plurality of fixing rods 144 and positioning pins 146 that are telescopically disposed in the fixing rods 144 . The fixing rods 144 are screwed onto the rotating shaft 120 at equal intervals, and the positioning pins 146 are telescopically disposed at the outer ends of the fixing rods 144. The spring 142 is sleeved on the fixing rod 144 and is abutted on the end of the positioning pin 146 and the rotating shaft 120.

Referring to FIG. 3 , in use, an annular workpiece to be inspected 200 is positioned at the end of the rotating shaft 120 through the positioning device 140 and received in the receiving space 116 of the base 110 . The positioning pin 146 of the positioning device 140 is abutted against the inner wall of the annular workpiece to be inspected by the spring 142. Since the positioning pin 146 of the positioning device 140 can slide within the fixing rod 144, Therefore, the positioning pin 146 together with the spring 142 constitutes a self-centering structure, and the ring-shaped workpiece to be inspected 200 can be automatically centered. After the positioning of the workpiece to be inspected 200 is completed, the micrometer 130 is adjusted to cause the probe 136 of the micrometer 130 to abut on the outer surface of the workpiece 200 to be inspected. Then, the rotation of the rotating shaft 120 drives the workpiece 200 to be detected to rotate. During the rotation, the change of the surface shape of the workpiece 200 to be detected can be read by the micrometer 130, so that the measurement can be conveniently performed. The roundness of the workpiece 200 to be inspected.

The roundness detecting device 100 of the present invention has a simple structure, and can conveniently measure the roundness of the workpiece to be detected. Further, the roundness detecting device 100 can also measure the surface roughness of the workpiece to be detected.

It can be understood that a friction plate can be disposed at the end of the positioning pin 146 of the positioning device 140 to increase the friction between the positioning pin 146 and the workpiece to be inspected.

It can be understood that, in order to prevent the micrometer 130 from being displaced during the measurement, a bolt hole (not shown) penetrating perpendicularly to the through hole 114a may be disposed at a top end of the sidewall 114 of the base 110, and A bolt is placed in the bolt hole to abut against the rod 134 of the micrometer 130, thereby fixing the micrometer 130.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ roundness detection device

110‧‧‧Base

112‧‧‧floor

114‧‧‧ side wall

116‧‧‧ accommodating space

112a‧‧‧Axis hole

114a‧‧‧through hole

120‧‧‧ shaft

130‧‧‧Micrometer

132‧‧‧Reading meter

134‧‧‧ rod body

136‧‧‧ probe

140‧‧‧ Positioning device

Claims (7)

A roundness detecting device includes a base, a rotating shaft, a micrometer, and a positioning device, wherein the rotating shaft is rotatably disposed on the base, and the micrometer is disposed corresponding to the rotating shaft Disposed on the base and spaced apart from the rotating shaft, the positioning device includes a plurality of springs, a plurality of fixing rods, and a plurality of positioning pins telescopically disposed in the fixing rod, the fixing rods, and the like Intersectably screwed onto the rotating shaft, the positioning pin is telescopically disposed at an outer end of the fixing rod, and the spring is sleeved on the fixing rod and abuts at an end of the positioning pin And on the rotating shaft, the positioning pin is pressed against the inner wall of the workpiece to be inspected by the spring. The roundness detecting device of claim 1, wherein: the base comprises a bottom plate and a side wall extending from a bottom edge of the bottom plate in a direction perpendicular to the bottom plate, and is disposed at a center of the bottom plate There is a shaft hole, and one end of the shaft is rotatably disposed in the shaft hole. The roundness detecting device of claim 2, wherein a sidewall of the base defines a through hole perpendicular to the sidewall and penetrating the sidewall, and the micrometer is disposed through the through hole. On the side wall. The roundness detecting device of claim 3, wherein: the micrometer comprises a reading meter, a rod body, and a probe, the rod body being connected to the reading meter and passing through the The through hole is fixed to the side wall of the base, and the probe is connected to the meter and protrudes from the end of the rod. The roundness detecting device according to claim 1, wherein a rolling bearing is disposed between the rotating shaft and a sidewall of the shaft hole. The roundness detecting device according to claim 1, wherein: the end of each of the positioning pins A friction plate is provided in the portion. The roundness detecting device of claim 4, wherein a top end of the side wall of the base is provided with a bolt hole penetrating perpendicularly to the through hole, and a bolt is disposed in the bolt hole. The bolt is placed on the rod of the micrometer.