CN201909614U - Rotating platform structure for automatic optical measuring instruments - Google Patents

Abstract

The utility model discloses a rotating platform structure, which provides a simple structure, stable and reliable rotation, and can perform all-round measurement on test parts in one positioning, so that the detection efficiency and detection accuracy can be improved, which is used for automatic optical measuring instruments. The rotating platform structure is characterized in that: a positioning plate (2) is provided on the working platform (1), and the positioning plate (2) is rotatably supported by a thrust self-aligning bearing (62) and a tapered roller bearing (61) There is a transition shaft, the lower end of the transition shaft extends below the working platform (1) and is connected to the vertical drive shaft (4) through a coupling (7), and the upper end of the transition shaft is fixedly connected to the horizontal fixed plate (5) The invention solves the technical problems of long measurement period, low efficiency, and reduced measurement accuracy that exist in the prior art when the test part needs to be repeatedly positioned when the measurement surface is switched.

Description

Rotating platform structure for automatic optical measuring instrument

technical field

The utility model relates to a rotating platform structure, in particular to a rotating platform structure which is stable and reliable and used for an automatic optical measuring instrument.

Background technique

In the prior art, the precise measurement of variable cross-section parts usually adopts three-coordinate measurement, which determines the position of the spatial point through the probe moving in the Cartesian coordinate system. When the probe touches the measured part , the probe is forced and triggers the measuring machine to record the three coordinate information of the current point. This method has high measurement accuracy and is not limited by the shape of the measured component, so it is widely used in industrial measurement. However, the measurement often has higher requirements on the surrounding environment, so people began to use optical measuring instruments with lower requirements on the surrounding environment, wider application range and higher measurement accuracy for measurement, but both of them need to be measured Parts are fixed on the working platform, and the common fixing method is to directly stick the parts to be tested on the working platform with glue. When changing the measurement surface, it needs to be removed and then fixed again, resulting in long measurement cycle, low efficiency, and affecting parts. The measurement accuracy is high, and it is also difficult to adapt to the detection of large quantities of parts.

The Chinese patent discloses a sample measuring rotation mechanism (CN101520295A), which includes two air claw seats arranged on the base plate, one of which is fixed with a shaft, and a rotatable driven air claw is set on the shaft. An air claw seat is provided with a through hole, and a shaft whose two ends are respectively fixed to the active air claw and the rotary cylinder is arranged in the through hole. This device uses air claws to hold the sample, and the rotary cylinder drives the air claws to rotate 90 degrees or 270 degrees, so its measurement range is limited to the upper and lower surfaces, the structure is relatively complicated, and there are also secondary problems when changing the measurement surface in the horizontal direction. Positioning, which leads to technical problems such as long measurement cycle, low efficiency, and affects the measurement accuracy of parts.

Contents of the invention

The utility model mainly provides a rotating platform structure for an automatic optical measuring instrument with simple structure, stable and reliable rotation, one-time positioning to measure the test parts in all directions, thereby improving the detection efficiency and detection accuracy. In the prior art, the test parts need to be positioned repeatedly when changing the measurement surface, which leads to technical problems such as long measurement period, low efficiency, and reduced measurement accuracy.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: the rotating platform structure used for automatic optical measuring instruments includes a working platform, and a positioning plate is arranged on the working platform, and the positioning plate is The self-aligning bearing and the tapered roller bearing are rotatably supported by a transition shaft. The lower end of the transition shaft extends below the working platform and is connected with the vertical drive shaft through a coupling. The upper end of the transition shaft is fixedly connected with the horizontal fixed plate. Thrust self-aligning bearings and tapered roller bearings are used to carry the axial load and radial load of the horizontal fixed plate used to fix the test parts, which reduces the force and motion wear of the transmission pair, and improves the rotational bearing performance of the rotating platform. It avoids the force of the transmission pair and the friction noise caused by the wear and tear of the movement and the unevenness of the movement, so that the rotating platform has high rotation precision, good movement stability, high safety factor, and simple overall structure. When testing, firstly fix the test parts On the horizontal fixed plate, only need to rotate the horizontal fixed plate to drive the test part to rotate during the conversion measurement, that is, the test part can be measured in all directions with one positioning, so as to improve the detection efficiency and detection accuracy.

Preferably, the positioning plate includes an annular chassis and a cover ring extending on the annular chassis, the cover ring faces the horizontal fixed plate, the transition shaft is inserted into the middle hole of the positioning plate, and the tapered roller bearing It is embedded between the center hole of the annular chassis and the transition shaft, and the thrust self-aligning bearing is embedded between the center hole of the cover ring and the transition shaft. The bearing is fixed by a positioning disc with a groove on one side, and the fixing method is simple and reliable.

More preferably, the transition shaft includes a lower transition shaft and an upper transition shaft coaxially fixed on the lower transition shaft, the tapered roller bearing is embedded between the center hole of the annular chassis and the lower transition shaft, and the thrust self-aligning The bearing is embedded between the middle hole of the cover ring and the upper transition shaft. Dividing the transition shaft into upper and lower sections facilitates the installation and adjustment of the bearing, and at the same time facilitates the processing of the transition shaft and reduces the processing cost.

Preferably, a shaft hole is coaxially provided in the middle of the transition shaft, the vertical drive shaft, the shaft coupling and the horizontal fixed disk. The hollow structure is light in weight, so that the horizontal fixed plate can rotate flexibly, and at the same time, it is also convenient for the wires used on the equipment to pass through the shaft hole, thereby ensuring that the wires will not be damaged and the appearance of the equipment can be kept clean.

Preferably, an annular base is provided at the bottom of the positioning plate, and the positioning plate is fixed on the working platform through the annular base. By setting the annular base between the positioning plate and the working platform, the stability of the positioning plate can be improved, and at the same time, the fixed connection of the positioning plate can be facilitated.

Preferably, the horizontal fixed plate is disc-shaped, and several positioning holes are arranged on the horizontal fixed plate, and the positioning holes are evenly distributed in the circumferential direction along the central axis of the horizontal fixed plate. By setting positioning holes on the fixed plate, it is convenient to fix the test parts.

Therefore, the rotary platform structure used for the automatic optical measuring instrument of the utility model has the following advantages: the axial load and the radial load of the horizontal fixed disk are carried by the thrust self-aligning bearing and the tapered roller bearing, which reduces the load of the transmission pair. Stress and motion wear improve the rotation bearing performance of the rotary platform, avoid the friction noise and unevenness during motion caused by the force of the transmission pair and motion wear, and make the rotary platform have high rotation accuracy and good motion stability. High safety factor, simple overall structure, only need to rotate the horizontal fixed plate to drive the test part to rotate during the conversion measurement, that is, the test part can be measured in all directions with one positioning, so as to improve the detection efficiency and detection accuracy; through one side belt The positioning plate with grooves is used to fix the bearing, and the fixing method is simple and reliable; the transition shaft is divided into upper and lower sections, which is convenient for the installation and adjustment of the bearing, and reduces the processing cost of the transition shaft.

Description of drawings:

Fig. 1 is the structure schematic diagram of the rotary platform structure that the utility model is used for automatic optical measuring instrument;

Fig. 2 is a longitudinal sectional view shown in Fig. 1 .

Detailed ways:

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example:

As shown in Figure 1, the rotating platform structure that is used for the automatic optical measuring instrument of the present utility model comprises the work platform 1 that is made of marble, on the work platform 1 is fixed an annular base 9 by bolts, on the annular base 9 again Fix a positioning disc 2 by bolts, as shown in Figure 2, the positioning disc 2 rotates through a thrust self-aligning bearing 62 and a tapered roller bearing 61 to support a transition shaft, and the lower end of the transition shaft passes through the hole on the working platform 1 and extends to The bottom of the working platform 1 is coaxially connected with the vertical drive shaft 4 through the coupling 7, and the upper end of the transition shaft is coaxially fixed with a horizontal fixed plate 5 by bolts, and several positioning holes 51 are vertically opened on the horizontal fixed plate 5 , and the positioning holes 51 are evenly distributed in the circumferential direction along the central axis of the horizontal fixed plate 5 . Wherein the positioning plate 2 includes an annular chassis 21 and a cover ring 22 coaxially integrally connected to the annular chassis 21, the side of the cover ring 22 faces the horizontal fixed plate 5, and the transition shaft includes a lower transition shaft 31 and is coaxially connected to the lower transition shaft 31. On the upper transition shaft 32, the tapered roller bearing 61 is embedded between the middle hole of the annular chassis 21 and the lower transition shaft 31, and the thrust self-aligning bearing 62 is embedded between the middle hole of the cover ring 22 and the upper transition shaft 32. Coaxially have the shaft holes 8 of the same size in the middle part of the transition shaft, the vertical drive shaft 4, the shaft coupling 7 and the horizontal fixed disk 5.

During use, first the test parts or the clamps holding the test parts are fixed on the horizontal fixed disk 5, and then the drive device connected to the vertical drive shaft 4 is started, and the drive device drives the vertical drive shaft 4 and the vertical drive shaft 4. The horizontal fixed disk 5 is rotated until the test part on the horizontal fixed disk 5 reaches a suitable angle and then the measurement can be carried out. When changing the measuring surface, it is only necessary to start the driving device again, which saves time and effort, and is convenient and fast.

The specific embodiments described herein are only examples for the concept of the present utility model, and those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods Replacement, but will not deviate from the spirit of the utility model or go beyond the scope defined by the appended claims.

Claims (8)

1. A rotary platform structure for an automatic optical measuring instrument, comprising a working platform (1), characterized in that: a positioning disc (2) is provided on the working platform (1), and the positioning disc (2) A transition shaft is rotatably supported by a thrust self-aligning bearing (62) and a tapered roller bearing (61). The lower end of the transition shaft extends below the working platform (1) and connects with the vertical drive shaft (4) through a coupling (7). ) is connected, and the upper end of the transition shaft is fixedly connected with the horizontal fixed plate (5). 2. The rotating platform structure for automatic optical measuring instrument according to claim 1, characterized in that: the positioning disc (2) comprises an annular chassis (21) and a cover ring extending on the annular chassis (21) (22), the cover ring (22) faces the horizontal fixed plate (5), the transition shaft is inserted into the middle hole of the positioning plate (2), and the tapered roller bearing (61) is embedded in the annular chassis (21) Between the middle hole and the transition shaft, the thrust self-aligning bearing (62) is embedded between the middle hole of the cover ring (22) and the transition shaft. 3. The rotating platform structure for automatic optical measuring instrument according to claim 2, characterized in that: said transition shaft comprises a lower transition shaft (31) and an upper transition shaft coaxially fixed on the lower transition shaft (31) (32), the tapered roller bearing (61) is embedded between the middle hole of the annular chassis (21) and the lower transition shaft (31), and the thrust self-aligning bearing (62) is embedded in the cover ring (22) Between the middle hole and the upper transition shaft (32). 4. The rotating platform structure for automatic optical measuring instrument according to claim 1, 2 or 3, characterized in that: in the transition shaft, the vertical drive shaft (4), the coupling (7) and the horizontal fixed The central part of the disc (5) is coaxially provided with a shaft hole (8). 5. The rotating platform structure for automatic optical measuring instrument according to claim 1, 2 or 3, characterized in that: an annular base (9) is provided at the bottom of the positioning disc (2), and the positioning disc (2) It is fixed on the working platform (1) through the ring base (9). 6. The rotating platform structure for automatic optical measuring instrument according to claim 4, characterized in that: an annular base (9) is provided at the bottom of the positioning disc (2), and the positioning disc (2) passes through The annular base (9) is fixed on the working platform (1). 7. The rotating platform structure for automatic optical measuring instrument according to claim 1, 2 or 3, characterized in that: the horizontal fixed plate (5) is disc-shaped, and the horizontal fixed plate (5) Several positioning holes (51) are arranged on the top, and the positioning holes (51) are evenly distributed in the circumferential direction along the central axis of the horizontal fixed plate (5). 8. The rotating platform structure for automatic optical measuring instrument according to claim 6, characterized in that: the horizontal fixed plate (5) is disc-shaped, and several horizontal fixed plates (5) are provided with positioning holes (51), and the positioning holes (51) are evenly distributed in the circumferential direction along the central axis of the horizontal fixed plate (5).

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