TWI468683B - Apparatus for rim measurement - Google Patents

Description

Testing device for measuring rims

The invention relates to bicycle rim measurement techniques, particularly for measuring rims.

In recent years, under the promotion of people from all walks of life, cycling has become quite popular. Therefore, the safety of bicycles has become more and more important. There are many factors affecting the safety of bicycle driving. The rim quality of bicycle wheels is one of them. At present, relevant equipment has been used to perform inspection of rim quality, such as Taiwan Announcement No. 166042, 148475, 335893, I256922, M378851, 200835911 The device or device shown in the patent case.

Some of the devices or devices shown in the above patents relate to measuring the degree of axial yaw and the degree of radial yaw of a rim during rotation. However, there is still a need for further changes to these mechanisms in response to current quantities. Measuring demand.

The present invention provides a detecting apparatus for measuring a rim and a method thereof. The detecting device mainly comprises two collets and an axial offset measuring device. The axial offset measuring device comprises a base, a movable seat is freely movable on the base, a freely rotatable idler is mounted on the movable seat, and a power unit is disposed on the base And having a telescopic rod and a stopper, an electronic measuring portion is disposed on the base and has a telescopic sensing rod, and two ends of a spring respectively abut a side of the base and a side of the movable seat . Wherein the telescopic rod passes through the movable seat, and the stopper is fixed on a section of the telescopic rod passing through the movable seat, the idler wheel surface is opposite to one of the outer annular surfaces of the wheel frame, and one of the clips One side of the head is aligned. One end of the sensing rod is coupled to the movable seat, and the electronic measuring unit measures, by the sensing rod, a distance that the idler is displaced by one of the outer annular surfaces of the wheel frame, that is, an offset of the outer annular surface.

The invention also includes another axial offset measuring device that is substantially identical to the axial offset measuring device described above. The electronic measuring portion of the other axial offset measuring device measures the axial offset of the other outer annulus of the wheel frame.

Other inventive aspects and more detailed technical and functional descriptions of the present invention are disclosed in the following description.

The first figure shows a preferred example of the detecting device of the present invention, comprising a machine table 1, and two clamping devices 2, 3 disposed on the machine table 1, two axial offset measuring devices 4, 5, A radial offset measuring device 6, a drive device 8, and a computer system (not shown) are used to control the operation of the aforementioned devices. The two clamping devices 2 are used to clamp a rim 9 so that the rim 9 is in a rotatable state. The two-axis offset measuring device 4, 5 is used to measure the axial offset of the rim 9. The radial offset measuring device 6 is used to measure the radial offset of the rim 9. The driving device 8 is used for driving the rim 9 to rotate at least one turn, so that the degree of axial offset and the degree of radial offset of each position of the rim 9 can be controlled by the measuring devices 4, 5. , 6 measured. In this case, the driving device 8 is not necessary, and the driving device 8 can be replaced by manually rotating the rim 9.

As shown in the second figure, the detecting apparatus of the present invention further includes a displacement measuring device 7 for measuring the displacement distance of the collet 30. The displacement measuring device 7 is essentially an optical scale comprising an optical detector 70 and a ruler 71. The optical detector 70 is disposed on the chuck 30. The ruler 71 is disposed on the machine 1 and is opposite to the optical detector 70. Therefore, the computer system can measure by the displacement measuring device 7 how much the chuck 30 is moved relative to the machine 1.

As shown in the third figure, the clamping device 2 has a collet 20 and a pushing device 21. The bottom of the collet 20 is slidably sleeved on one of the rails 11 of the machine table 1 and is movable laterally relative to the machine table 1, i.e., in the X-axis direction. The pushing device 21 is disposed on the machine table 1 and is optionally provided with a steam pressure cylinder or a hydraulic cylinder for pushing the chuck 20 to move.

The other holding device 3 has a collet 30, a rail 12 and a pushing device 31. The collet 30 is located directly opposite the other collet 20, and its bottom portion is sleeved on the rail 12 and is movable laterally relative to the machine table 1, i.e., along the X axis. The pushing device 31 may be selected from a steam cylinder or a hydraulic cylinder for pushing the chuck 30 to move. The rail 12 and the pushing device 31 can be directly disposed on the machine table 1. However, in this example, in order to adapt to different specifications of the rim, as shown in the second and third figures, the other clamping device 3 Preferably, a sliding seat 13 is sleeved on a sliding slot 14 of the machine table 1. The rail 12 and the pushing device 31 are fixedly disposed on the sliding seat 13, and the bottom of the sliding seat 13 is screwed to A lead screw 15 on the machine table 1 is pivoted, and a hand wheel 16 is disposed at one end of the lead screw 15. Therefore, rotating the hand wheel 16 can drive the slide 13 to move laterally.

Referring to the fourth and fifth figures, the axial offset measuring device 4 includes a base 40, a movable seat 41 disposed on the base 40, and a power unit 42. An electronic measuring unit 43, a spring 44, and an idler pulley 46. The base 40 is located above the collet 20 and is movable up and down relative to the collet 20, that is, in the Z-axis direction. In this example, the base 40 is disposed by a lead screw mechanism 45. On the collet 20, the hand wheel 450 rotating the lead screw mechanism 45 can drive the base 40 for lifting displacement.

The movable seat 41 is disposed on the base 40. In this example, the movable seat 41 is disposed on the base 20 by two sliding rods 411 and two low friction bearings 412. Therefore, the activity The seat 41 slides freely on the base 20.

The idler gear 46 is disposed on the movable seat 41 and is freely rotatable.

The power unit 42 can be a hydraulic cylinder or a steam cylinder disposed on the base 40 and having a telescopic rod 420 passing through the movable seat 41, and a stopper 421 fixed to the telescopic rod 420. The section of the movable seat 41, for example, the end of the telescopic rod 420, allows the movable seat 41 to freely move along the telescopic rod 420.

The electronic measuring unit 43 is disposed on the base 40 for measuring the displacement distance of the movable seat 41. The measuring device 43 can be selected from a commercially available potentiometer having a telescopic sensing rod 430. One end of the sensing rod 430 is coupled to the movable seat 41. Therefore, the movement of the movable seat 41 can be via the sensing rod 430. The reaction is performed on the electronic measuring unit 43. Since the idler gear 46 is disposed on the movable seat 41, the amount of movement of the movable seat 41 corresponds to the amount of movement of the idler gear 46. The electronic measuring unit 43 is electrically connected to the computer system, and the measurement result, that is, the amount of movement of the idler 46 is transmitted to the computer system.

The spring 44 is sleeved on the sensing rod 430, and the two ends respectively abut the base One side of the seat 40 and one side of the movable seat 41.

Referring to FIG. 6 , another axial offset measuring device 5 includes a base 50 , a movable seat 51 disposed on the base 50 , a power unit 52 , an electronic measuring unit 53 , and a spring 54 . And an idler gear 56, the devices are correspondingly identical to the base 40, the movable seat 41, the power unit 42, the measuring device 43, the spring 44, and the idler 46, and are not described herein. As shown in the third figure, the base 50 is coupled to the slide 13 and is movable along the slide 13. The base 50 is in the upshift of the slide rail 500. The slide rail 500 is preferably composed of one or more parallel straight rods, and the base 50 is sleeved on the straight rods. In addition, the base 50 is further connected to a lead screw lifting and lowering stage 55 disposed on the machine table 1. Therefore, the lead screw 550 of the lead screw lifting and lowering stage 55 can be rotated to drive the base 50 along the sliding rail. 500 for lifting displacement.

The seventh and eighth figures show the situation in which the two collets 50 hold the hub 90 of the rim 9 in a partial plan view. The action of the two collets 20, 30 clamping the mandrel 901 of the hub 90 is as follows: initially, as shown in the third figure, the two collets 20, 30 are respectively in their original positions, and then, in the computer system Under the control: please refer to the seventh figure, and the pushing device 21 is caused to move the collet 20 from its original position to a reference point position. In this example, the end point of the advancement stroke of the collet 20 is the reference point. Positioning; the chuck 20 is clamped to one end of the mandrel 901 of the hub 90 of the rim 9. In this case, please refer to the eighth figure, a side surface 200 of the collet 20 is abutted against the hub 90. Side surface 900; causing the pushing device 31 to move the collet 30 from its original position to a reference point position; The collet 30 is clamped to the other end of the mandrel 901. At this time, please refer to the eighth figure, a side surface 300 of the collet 30 is abutted against the other side 900a of the hub 90.

Thus, the work of clamping the mandrel 901 by the two chucks 20, 30 is completed. . Wherein, the two collets 20, 30 can be used with a three-jaw or four-jaw chuck commonly used in metal working machines for clamping or loosening both ends of the mandrel 901.

Please refer to the ninth drawing, which is a front view of the first figure, in which the movable seats 41, 51 of the axial offset measuring device 4, 5 are shown in their original positions, at which time the movable seat 41 compresses the spring. 44. The power unit 42 pulls the movable seat 41 by its telescopic rod 420 and the stopper 421, and the wheel surface of the idler wheel 46 is flush with the side surface 200 of the chuck 20, and is facing the rim 9 One of the outer annular faces 910 of the wheel frame 91. The same situation also occurs in the axial offset measuring device 5, which is not described herein. At this time, the wheel surface of the idler gear 56 is flush with the side surface 300 of the collet 30, and the other is positive for the wheel frame 91. An outer annulus 911.

Next, the computer system causes the axial offset measuring device 4 to begin a measurement operation, that is, the power portion 42 pushes its telescopic rod 420 to the end of its stroke, in the process, by the reply of the spring 44 The movable seat 41 can be pushed toward the wheel frame 91 until the wheel surface of the idler gear 46 abuts against the outer annular surface 910 of the wheel frame 91, as shown in the tenth figure, at the same time, The sensing rod 430 of the electronic measuring unit 43 is pulled by the movable seat 41 and pushed toward the wheel frame 91 until the wheel surface of the idler gear 46 abuts against the outer annular surface 910 of the wheel frame 91, thus, the electronic measurement The portion 43 can measure the moving distance of the idler 46 by detecting the movement of the sensing rod 430. While the computer system causes the axial offset measuring device 4 to expand its measurement operation, the axial offset measuring device 5 is also caused to perform a measurement operation, the process being the same as The axial offset measuring device 4 is not described, in short, the electronic measuring portion 53 can measure the moving distance of the idler gear 56.

Since the two outer annuluses 910, 911 of the rim 9 may not be flat (ie, from the beginning to the end, some may be more to the right, and some may be more to the left), so the rim 9 is During the rotation of one turn, the two outer annular faces 910, 911 of the wheel frame 91 are laterally offset with respect to the center point of the hub 90, thereby respectively shifting the idler gears 46, 56 so that the electronic measuring portion The distance measured at each point on the outer annulus 910 is not the same, and the distance measured by the other electronic measuring portion 53 at each point on the outer annulus 911 is also different.

Thus, after the rim 9 rotates one revolution, the computer system can measure the right axial offset value of each point of the wheel frame 91 by the axial offset measuring device 4, and by the axis The left axial offset value of each point of the wheel frame 91 is measured to the offset measuring device 5.

Then, the computer system can further calculate a center deviation value according to the left axial offset values and the right axial offset values. In addition, the computer system may calculate two flat values representing the flatness of the two outer annular surfaces 910 and 911 of the wheel frame 91 according to the left axial offset values and the right axial offset values.

As shown in the ninth figure, the present invention further includes two optical detectors 72 respectively mounted inside the two collets 20, 30 and electrically connected to the computer system, and optical detection in the collet 20 The detector 72 can detect the distance between the spindle and the spindle 901. The optical detector 72 located in the chuck 30 can detect the distance between the spindle and the spindle 901. The two optical detections are detected. The detection result of the device 72 can be used to compensate for the axial offset measuring device 4 and the axial offset The error of the measurement device 5 in the measurement.

Referring to FIG. 11 , the radial offset measuring device 6 includes a base 60 , a movable seat 61 disposed on the base 60 , a power unit 62 , an electronic measuring unit 63 , and a spring 64 . And an idler pulley 66. The foregoing configurations correspond one-to-one to the same or similar to the base 40, the movable seat 41, the power portion 42, the measuring device 43, the spring 44, and the idler pulley 46, and are not described herein. The difference is that the base 60 is disposed on the lead screw lifting and lowering table 55 and can be moved up and down together. Further, the base 60 can also be laterally displaced on the lead screw lifting and lowering table 55. As shown in the twelfth figure, while the axial offset measuring device 4, 5 performs the above-described center deviation measuring operation, the idler gear 66 of the radial offset measuring device 6 is abutted against the wheel frame 91. In the periphery, once the wheel frame 91 is radially offset, i.e., moved up and down in the Z-axis direction, the offset condition can be measured and transmitted to the computer system via the radial offset measuring device 6.

As can be seen from the above description, after receiving the measurement results of the measuring devices 4, 5, 6, and 7, the computer system of the present invention can calculate the center deviation value and/or the axial direction of the rim 9 based on the measurement results. Offset value, and/or radial offset value, and outputting, for example, displaying the center deviation value, and/or some offset value on a display, and/or using a printing device to offset the center deviation value, And/or offset values are printed on the paper or printed on the outer annulus of the wheel frame 91 of the rim 9.

In any event, anyone can obtain sufficient teaching from the description of the above examples, and it is understood that the present invention is indeed different from the prior art, and is industrially usable and progressive. It is the invention that has indeed met the patent requirements and has filed an application in accordance with the law.

1‧‧‧ machine

11‧‧‧ Track

12‧‧‧ Track

13‧‧‧Slide

14‧‧‧Chute

15‧‧‧ lead screw

16‧‧‧Handwheel

2, 3‧‧‧ clamping device

20, 30‧‧‧ chucks

200, 300‧‧‧ side

21, 31‧‧‧ pushing device

4‧‧‧Axial offset measuring device

40‧‧‧Base

41‧‧‧ activity seat

411‧‧‧ Slider

412‧‧‧ bearing

42‧‧‧Power Department

420‧‧‧ Telescopic rod

43‧‧‧Measurement device

430‧‧‧Sensor rod

44‧‧‧ Spring

45‧‧‧ lead screw mechanism

450‧‧‧Handwheel

46‧‧‧ Idler

5‧‧‧Axial offset measuring device

50‧‧‧ pedestal

500‧‧‧rails

51‧‧‧ activity seat

52‧‧‧Power Department

53‧‧‧Electronic Measurement Department

54‧‧‧ Spring

55‧‧‧ lead screw lifting platform

550‧‧‧ lead screw

56‧‧‧ Idler

6‧‧‧ Radial offset measuring device

60‧‧‧Base

61‧‧‧ activity seat

62‧‧‧Power Department

63‧‧‧Electronic Measurement Department

64‧‧‧ Spring

66‧‧‧Idle wheel

7‧‧‧Displacement measuring device

70‧‧‧ optical detector

71‧‧‧ feet

72‧‧‧ optical detector

8‧‧‧ drive

9‧‧‧ rims

90‧‧·wheels

900, 900a‧‧‧ side

901‧‧‧ mandrel

91‧‧‧ wheel frame

910, 911‧‧‧ outer annulus

The first figure is an external view of a preferred embodiment of the present invention.

The second drawing is a partial appearance view of the collet of the preferred embodiment of the present invention.

The third drawing is a partial appearance view of the preferred embodiment of the present invention.

The fourth drawing is an external view of the axial displacement measuring device 4 of the preferred embodiment of the present invention.

The fifth diagram is a front view of the axial offset measuring device 4.

Fig. 6 is an external view of the axial displacement measuring device 5 of the preferred embodiment of the present invention.

Figure 7 is a plan view showing the two collets 20, 30 of the preferred embodiment of the present invention for explaining the operation thereof.

The eighth figure shows the case where the two collets 20, 30 sandwich the mandrel 901 of a hub 90.

The ninth and tenth views show a partial front view of the preferred embodiment of the present invention to illustrate how it measures a center deviation value.

Figure 11 is an external view of a radial offset measuring device 6 of the preferred embodiment of the present invention.

Fig. 12 is a front elevational view showing the preferred embodiment of the present invention for explaining the function of the radial offset measuring device 6.

1‧‧‧ machine

11‧‧‧ Track

12‧‧‧ Track

13‧‧‧Slide

14‧‧‧Chute

15‧‧‧ lead screw

16‧‧‧Handwheel

2, 3‧‧‧ clamping device

20, 30‧‧‧ chucks

21, 31‧‧‧ pushing device

4,5‧‧‧Axial offset measuring device

50‧‧‧ pedestal

500‧‧‧rails

55‧‧‧ lead screw lifting platform

550‧‧‧ lead screw

6‧‧‧ Radial offset measuring device

Claims (8)

A detecting device for measuring a rim, the rim having a hub and a wheel frame having opposite sides and a mandrel, the two ends of the mandrel projecting from the two sides of the hub respectively The wheel frame has two outer annular faces and an outer peripheral edge opposite to each other. The detecting device comprises: a machine table; two clamping devices are disposed on the machine table, and each clamping device has a chuck And a pushing device, respectively, for clamping the two ends of the mandrel of the hub, and each having a side for respectively facing the two sides of the hub, the two pushing devices are respectively for pushing the two The chuck is displaced; and an axial offset measuring device is disposed on the machine, and includes: a base, the base surface is one of the outer annular surfaces of the wheel frame; and a movable seat is disposed on the base Up and free to move on the base; a freely rotatable idler is mounted on the movable seat, and the tread is facing one of the outer annular faces of the wheel frame, and is clamped to one of the outer rings The side of the chuck of the device is aligned; a power portion is disposed on the base and has a stretch a rod passes through the movable seat, and a stopper is fixed on a section of the telescopic rod passing through the movable seat; an electronic measuring part is disposed on the base and has a telescopic sensing rod, and the sensing rod is One end is connected to the movable seat, The electronic measuring unit measures, by the sensing rod, a distance that the idler wheel is moved by one of the outer ring faces of the wheel frame; and a spring whose two ends respectively abut against a side of the base and a side of the movable seat. The detecting device of claim 1, further comprising another axial offset measuring device disposed on the machine, the another axial offset measuring device comprising: a base, the surface for the a further outer ring surface of the wheel frame; a movable seat disposed on the base and freely movable on the base; a freely rotatable idler wheel mounted on the movable seat and having a tread The other outer annular surface of the wheel frame is aligned with the side surface of the chuck of the other clamping device; a power portion is disposed on the base and has a telescopic rod passing through the movable seat And a stopper is fixed on the section of the telescopic rod passing through the movable seat; an electronic measuring part is disposed on the base and has a telescopic sensing rod, one end of the sensing rod is coupled to the movable seat, The electronic measuring unit measures the distance that the idler is displaced by the other outer ring surface of the wheel frame via the sensing rod; a spring has two ends opposite to a side of the base and a side of the movable seat. The detecting device of claim 2, wherein an axial offset measuring device is located at the chuck of the one of the clamping devices Above, the other axial offset measuring device is located below the collet of the other clamping device. The detecting device according to claim 2, comprising a displacement measuring device provided on the machine for measuring a displacement distance of the collet of the other clamping device. The detecting device according to claim 1, wherein two optical detectors are respectively mounted inside the two collets, and each optical detector can detect the two ends of the optical axis respectively. The spacing between the two. The detecting device of claim 1, wherein the axial offset measuring device is disposed on a chuck of the one of the clamping devices. The detecting device of claim 2, wherein the other clamping device further has a sliding sleeve sliding on a sliding slot of the machine, and the bottom of the chuck of the other clamping device is a sliding sleeve The other axial offset measuring device is mounted on the carriage on a track on the carriage. The detecting device of claim 4, wherein the displacement measuring device comprises an optical detector and a ruler, the optical detector is disposed on a chuck of the other clamping device, wherein the measuring device is disposed on the chuck On the machine.