Steering measurement equipment calibration device

Abstract

To provide a steering measurement instrument calibration apparatus which performs calibration with a small error to a steering measurement instrument whose inner side is in the hollow annular body shape and which allows a user to more easily understand the center position of the steering measurement instrument.SOLUTION: A steering measurement instrument calibration apparatus comprises: a main body board part; a plurality of rail parts which are formed radially toward an end from a center part of the main body board part; a contact block which is placed in each of the plurality of rail parts and contacts an inner peripheral part of a steering measurement instrument by sliding in a forward / backward movable manner between the center part and the end of the main body board part; a plurality of extrusion members which extrude the contact block to the end from the center part of the main body board part along the rail part; and an adjustment mechanism part which is arranged in the center part of the main body board part and moves all of the extrusion members forward equally from the center part of the main body board part. The position of placement of the steering measurement instrument in the main body board part of the steering measurement instrument is adjusted by making the contact block contact the inner peripheral part of the steering measurement instrument.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a steering measurement device calibration apparatus, and more particularly to an apparatus for calibrating the angle of a steering measurement device.

Background Art

[0002] For steering measurement, a steering measurement device is attached to the vehicle's steering wheel. And there is a calibration device for calibrating the steering angle of the steering measurement device. In this case, when calibrating the steering measurement device or the steering measurement device for factory inspection, it is necessary to accurately align the center of the steering measurement device and the center of the calibration device in order to ensure the calibration accuracy.

[0003] The steering measurement device is generally an annular member with an opening in the central part. When calibrating the steering measurement device, the virtual center line of the steering (the steering wheel to which it is attached) is aligned with the center of the standard device and the calibration device is connected. Then, the steering measurement device is appropriately rotated in the left-right direction and compared with the reference angle.

[0004] In this case, as error factors affecting the calibration result, there are (1) the orthogonal error between the horizontal axis and the standard axis, (2) the parallel error between the steering measurement device and the standard device, and (3) the eccentricity error of the centering (error of the center position). In particular, the problem of the third centering eccentricity error, that is, the difficulty in determining the center position of the steering measurement device has been regarded as a problem.

[0005] As a device or mechanism for determining the center position of an annular body such as a steering measurement device, a centering mechanism has been proposed (see Patent Document 1, etc.). However, with the centering mechanism disclosed in Patent Document 1, it was still difficult to accurately determine the center position in the steering measurement device.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present invention has been made in view of the above points, and is a calibration device for calibrating a steering measurement device having an annular shape with a hollow inside, and provides a steering measurement device calibration device with a small error with respect to the center position of the steering measurement device.

Means for Solving the Problems

[0008] That is, the steering measurement device calibration device of the embodiment is a device for calibrating a steering measurement device, and includes a main body plate portion, a plurality of rail portions radially formed from the central portion to the end portion of the main body plate portion, and a plurality of rail portions. A contact block that is placed on each of the rail portions and slides back and forth between the central portion and the end portion of the main body plate portion to contact the inner peripheral portion of the steering measurement device, and a plurality of extrusion members that extrude each contact block from the central portion to the end portion of the main body plate portion along the rail portion, and a central portion of the main body plate portion And an adjustment mechanism portion that advances all of the plurality of extrusion members evenly from the central portion of the main body plate portion, and adjusts the position of the steering measurement device placed on the main body plate portion of the steering measurement device by bringing the contact block into contact with the inner peripheral portion of the steering measurement device. It is characterized by that.

[0009] Furthermore, the adjustment mechanism portion of the steering measurement device calibration device includes a reference axis erected perpendicular to the axial center of the plurality of rail portions at the central portion of the main body plate portion, and a tapered portion that is inserted into the reference axis and abuts against the reference axis and has an inclined surface portion that expands in diameter upward. A disk contact portion having an outer peripheral portion that contacts a plurality of extrusion members, a tapered portion that is inserted into the reference axis and contacts the inclined surface portion, and a pressing adjustment portion that presses the disk contact portion downward may be provided.

[0010] Furthermore, the adjustment mechanism part of the steering measurement instrument calibration device may be provided with a connection part that presses the pressing adjustment part against the disk contact part.

[0011] Furthermore, the plurality of rail parts of the steering measurement instrument calibration device may be formed radially on the main body disk part at equal angular intervals, and three contact blocks and extrusion members may be provided.

[0012] Furthermore, an inclined part may be formed on the contact block of the steering measurement instrument calibration device, and the inclined part may contact the inner peripheral part of the steering measurement instrument.

[0013] Furthermore, a parallel adjustment block that contacts and supports the inner peripheral part of the steering measurement instrument may be provided on the outer peripheral part of the main body disk part of the steering measurement instrument calibration device.

[0014] Furthermore, a spring that connects the contact block and the extrusion member may be provided on the extrusion member of the steering measurement instrument calibration device.

Effect of the Invention

[0015] The steering measurement instrument calibration device of the present invention includes a main body disk part, a plurality of rail parts formed radially from the central part to the end part of the main body disk part, a contact block placed on each of the plurality of rail parts and sliding back and forth between the central part and the end part of the main body disk part to contact the inner peripheral part of the steering measurement instrument, a plurality of extrusion members that extrude each contact block from the central part to the end part of the main body disk part along the rail part, and an adjustment mechanism part arranged at the central part of the main body disk part and advancing all of the plurality of extrusion members evenly from the central part of the main body disk part. It is a calibration device for calibrating an annular steering measurement instrument with a hollow inside by bringing the contact block into contact with the inner peripheral part of the steering measurement instrument to adjust the center position of the steering measurement instrument on the main body disk part of the steering measurement instrument, and can make the error of the center position of the steering measurement instrument extremely small.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0017] The steering measurement instrument calibration device of the embodiment is a device for calibrating a steering measurement instrument in an annular form with a hollow central portion. The state of calibration is shown as a schematic diagram in Fig. 1. The steering measurement instrument calibration device 10 of the embodiment is installed horizontally and centered on the upper part of the rotary table 60. And, a steering measurement instrument 50 in an annular form with a hollow central portion is placed in accordance with the outer peripheral side of the steering measurement instrument calibration device 10. Therefore, through the steering measurement instrument calibration device 10, the horizontal, vertical, and central axes of the steering measurement instrument 50 are aligned. And, various operations are applied to the steering measurement instrument 50 as the rotary table 60 operates.

[0018] Figure 2 is a plan perspective view of the steering measuring instrument calibration device 10. The steering measuring instrument calibration device 10 includes a main body plate portion 11, a rail portion 12, an extrusion member 13, a contact block 14, an adjustment mechanism portion 20, a handle 31, and a parallel adjustment block 33. Each member and element will be described in order. The illustrated main body plate portion 11 is a triangle (a hexagon with extended three sides) with a missing corner portion and is a member made of metal such as stainless steel. A hollowed-out hole portion 17 is formed in the main body plate portion 11 to reduce the weight of the steering measuring instrument calibration device 10. Each side of the main body plate portion 11 has a symmetrical shape. The main body plate portion 11 can evenly support the steering measuring instrument 50 by means of the parallel adjustment blocks 33 provided on each long side.

[0019] Three pairs of rail portions 12 are formed radially at equal angular intervals from the central portion (the installation position of the adjustment mechanism portion 20) of the main body plate portion 11 toward the end portion of the main body plate portion 11. Since there are three pairs, the rail portions 12 are at an angular interval of 120° from each other around the central portion of the main body plate portion 11. The rail portions 12 are formed as concave depressions or penetrations on the surface of the main body plate portion 11. Also, an auxiliary rail portion 18 parallel to the rail portions 12 is provided (see FIG. 9 to be described later).

[0020] The contact block 14 and the extrusion member 13 are slidably placed on the rail portion 12. Since the three pairs of rail portions 12 have the same structure, for convenience, they are denoted as 12a, 12b, and 12c. Since the contact blocks 14 placed on each rail portion 12 have the same structure, they are respectively denoted as 14a, 14b, and 14c, and since the extrusion members 13 have the same structure, they are respectively denoted as 13a, 13b, and 13c. The contact block 14a and the extrusion member 13a slide forward and backward freely on the rail portion 12a. Similarly, the contact block 14b and the extrusion member 13b slide forward and backward freely on the rail portion 12b, and the contact block 14c and the extrusion member 13c slide forward and backward freely on the rail portion 12c.

[0021] When the contact blocks 14(14a, 14b, 14c) are placed on each of the plurality of rail portions 12(12a, 12b, 12c), they slide back and forth between the central portion and the end portion of the main body panel portion 11. And the contact blocks 14(14a, 14b, 14c) contact the inner peripheral portion 51 (see FIGS. 8 and 9) of the steering measurement device 50. That is, when the steering measurement device 50 is placed on the steering measurement device calibration device 10, the contact block 14 is a member that evenly presses the steering measurement device 50 from the inside.

[0022] The extrusion members 13(13a, 13b, 13c) extrude the respective contact blocks 14(14a, 14b, 14c) from the central portion of the main body panel portion 11 to the end portion along the rail portions 12(12a, 12b, 12c). The following adjustment mechanism portion 20 is used for the operation of the extrusion members 13(13a, 13b, 13c). It is possible to directly slide the contact blocks 14(14a, 14b, 14c) by the adjustment mechanism portion 20. However, in order to contact the steering measurement device 50, the adjustment mechanism portion 20 itself requires a large size. For this reason, the steering measurement device calibration device 10 becomes excessively heavy, and it is not easy to maintain the machining accuracy. Therefore, in order to make the adjustment mechanism portion 20 an appropriate size to suppress the weight increase and maintain the machining accuracy of the adjustment mechanism portion 20, the extrusion members 13(13a, 13b, 13c) are provided as members connecting the adjustment mechanism portion 20 and the contact blocks 14(14a, 14b, 14c).

[0023] Furthermore, the extrusion members 13(13a, 13b, 13c) are provided with springs 34 that connect the contact blocks 14(14a, 14b, 14c) and the extrusion members 13(13a, 13b, 13c). When the extrusion members 13(13a, 13b, 13c) retreat from the end portion side to the central portion side of the main body panel portion 11, the contact blocks 14(14a, 14b, 14c) are pulled by the springs 34. Therefore, the retreat of the extrusion members 13(13a, 13b, 13c) and the contact blocks 14(14a, 14b, 14c) becomes interlocked.

[0024] The adjustment mechanism unit 20 is disposed at the center of the main body plate unit 11 and advances all of the plurality of extrusion members 13 (13a, 13b, 13c) evenly from the center of the main body plate unit 11. The adjustment mechanism unit 20 is constituted by a disk-shaped member loosely fitted on the reference shaft 21. The structure and operation of the adjustment mechanism unit 20 will be described with reference to FIGS. 3 to 5 to be described later.

[0025] The main body plate unit 11 of the steering measuring instrument calibration device 10 is provided with parallel adjustment blocks 33 (33a, 33b, 33c) that abut against and support the inner peripheral portion 51 (see FIGS. 8 and 9) of the steering measuring instrument 50. The parallel adjustment blocks 33 (33a, 33b, 33c) are provided at the peripheral edge of the main body plate unit 11, mainly at the central positions of their respective long sides. The parallel adjustment blocks 33 (33a, 33b, 33c) receive the inner peripheral portion 51 of the steering measuring instrument 50 from below at three locations.

[0026] Since the three parallel adjustment blocks 33 (33a, 33b, 33c) have the same shape, they can support the inner peripheral portion 51 of the steering measuring instrument 50 evenly and be parallel to a standard device (not shown). Therefore, when the steering measuring instrument 50 is placed on the steering measuring instrument calibration device 10, the horizontality (parallelism) of the steering measuring instrument 50 is maintained.

[0027] In addition, for the convenience of transporting the steering measuring instrument calibration device 10 and attaching it to the rotation table 60, the main body plate unit 11 is provided with a handle 31. In the embodiment, the numbers of the rail portion 12, the contact block 14, and the extrusion member 13 are all three and correspond to each other. Although it is possible to increase the number to four or more, there may be a contact block 14 that does not participate in the contact with the steering measuring instrument 50, which may conversely cause instability. Therefore, it is desirable to set each to three from the viewpoints of stability and suppression of weight increase.

[0028] The structure and operation of the adjustment mechanism section 20 will be described with reference to FIGS. 3 to 5. The adjustment mechanism section 20 mainly includes members such as a reference shaft 21, a disk contact portion 24, and a pressing adjustment portion 26. The perspective view of FIG. 3 shows the disk contact portion 24 mounted on the main body disk portion 11. The main body disk portion 11 has a symmetrical shape in plan view, and the reference shaft 21 is erected at the center of the main body disk portion 11 at the center of the axial extension line of the rail portions 12 (12a, 12b, 12c) (see FIG. 2). A calibration standard (not shown) is installed at the center of the reference shaft 21.

[0029] As understood from FIG. 3, the disk contact portion 24 is provided with a disk opening 42 for inserting the reference shaft 21, and is provided with an inclined surface portion 22 that expands in diameter upward facing the reference shaft 21 on the side of the disk opening 42. And the disk contact portion 24 is provided with an outer peripheral portion 23 that contacts a plurality of extrusion members 13 (13a, 13b, 13c). The inclined surface portion 22 is accurately designed to be a perfect circle in cross section. Further, a plurality of adjustment springs 44 are provided on the upper portion of the disk contact portion 24.

[0030] FIG. 4 is a perspective view showing the pressing adjustment portion 26 removed from the steering measuring instrument calibration device 10. The pressing adjustment portion 26 is provided with a pressing opening 43 for inserting the reference shaft 21, and is provided with a tapered portion 25 (inverted cone) that contacts the inclined surface portion 22 of the disk contact portion 24. The tapered portion 25 is formed to have a reduced diameter downward, and the tapered portion 25 is accurately designed to be a perfect circle in cross section. The pressing adjustment portion 26 is provided with a connecting portion 41 (bolt) that presses the pressing adjustment portion 26 toward the disk contact portion 24 side. The connection destination of the connecting portion 41 is a screw hole (not shown) formed at the installation location of the adjustment spring 44.

[0031] FIG. 5 is a schematic longitudinal cross-sectional schematic view showing the contact state between the pressing adjustment portion 26 and the disk contact portion 24. In the illustration, the adjustment spring 44 is omitted. The disk contact portion 24 can contact any of the plurality of extrusion members 13 (13a, 13b, 13c). And the disk contact portion 24 is inserted through the reference axis 21 and is loosely fitted on the main body disk portion 11 so as to be moderately movable. On the other hand, the pressing adjustment portion 26 inserted through the reference axis 21 is restricted from moving only in the vertical direction shown in the figure by the reference axis 21. The cross sections of the inclined surface portion 22 of the disk contact portion 24 and the tapered portion 25 of the pressing adjustment portion 26 are designed with a perfect circle accuracy.

[0032] For this reason, when the pressing adjustment portion 26 is pressed downward (lowered) by tightening the plurality of connecting portions 41 (bolts), the tapered portion 25 (the end portion thereof) of the pressing adjustment portion 26 can evenly contact the inclined surface portion 22 of the disk contact portion 24. The adjustment spring 44 prevents the horizontal maintenance by the joining force (screw tightening force) of the connecting portion 41 from being lost. As a result, the center of the disk contact portion 24 is always adjusted to be equal to the center of the main body disk portion 11 (the center of the reference axis 21), and the alignment of the contact blocks 14 (14a, 14b, 14c) is performed through the extrusion members 13 (13a, 13b, 13c) that contact the outer peripheral portion 23 of the disk contact portion 24.

[0033] FIG. 6 is a plan view of a state in which a steering measuring instrument 50 having an annular shape with a hollow central portion is placed on the steering measuring instrument calibration device 10. From the description of FIG. 5, with the operation of the disk contact portion 24 and the pressing adjustment portion 26 of the adjustment mechanism portion 20, the outer peripheral portion 23 of the disk contact portion 24 contacts and the extrusion members 13 (13a, 13b, 13c) slide, and the contact blocks 14 (14a, 14b, 14c) also slide in conjunction. The distances of the individual contact blocks 14 (14a, 14b, 14c) from the center of the main body disk portion 11 (the center of the reference axis 21) are equal, and the center of the steering measuring instrument 50 is aligned with the center of the main body disk portion 11. In other words, when all of the plurality of contact blocks 14 (14a, 14b, 14c) contact (touch) the steering measuring instrument 50, the center of the steering measuring instrument calibration device 10 coincides with the center of the steering measuring instrument 50. For the confirmation of the center, a standard device (not shown) for measuring the center of the reference axis 21 is used.

[0034] FIG. 7 is a perspective view showing a state in which the steering measurement device 50 is placed on the steering measurement device calibration device 10 and the adjustment mechanism unit 20 is adjusted. A plurality of connection parts 41 (bolts) exposed on the upper surface side of the pressing adjustment part 26 are tightened by, for example, the illustrated hexagonal wrench R or the like. By tightening, the pressing adjustment part 26 is pressed (lowered) toward the disk contact part 24 side. When removing the steering measurement device 50 from the steering measurement device calibration device 10, by releasing the tightening of the connection part 41 (bolt), the contact between the contact block 14 (14a, 14b, 14c) and the steering measurement device 50 is weakened.

[0035] FIG. 8 is a schematic cross-sectional view showing the contact state between the contact block 14 and the steering measurement device 50. An inclined portion 16 that inclines from above to below the contact block 14 is formed in any of the contact blocks 14 (14a, 14b, 14c which are all common). Then, the inclined portion 16 contacts the inner peripheral portion 51 of the steering measurement device 50. As in the embodiment, by forming the inclined portion 16 in the contact block 14, the steering measurement device 50 can be easily placed on the contact block 14 side. Note that the inclined portion 16 is suppressed as an inclined angle considering the ease of placing the steering measurement device 50.

[0036] When the inclined portion 16 of the contact block 14 (any of 14a, 14b, 14c is common) has a gentle arc-shaped bulge instead of the shape of a simple inclined surface as shown in FIG. 8. Specifically, the contact block 14 has a shape obtained by cutting a cone, and the inclined portion 16 corresponds to a portion of the surface of the cone. If the inclined portion 16 is a flat inclined surface, there will be two contact points when one contact block 14 contacts the inner peripheral portion 51 of the steering measuring device 50, and it is difficult to be stable. Also, since the sizes of the steering measuring devices 50 are various, it becomes difficult to position the steering measuring device 50 through the contact block 14. On the other hand, since the inclined portion 16 of the embodiment has an arc-shaped bulge, even if the steering measuring devices 50 have different sizes, they only contact the inner peripheral portion 51 at only one point, and in the steering measuring device calibration apparatus 1, there are only a total of three points of contact, the stability during positioning is enhanced, and it becomes possible to flexibly cope with various sizes.

[0037] FIG. 9 is an enlarged perspective view showing the contact state between the contact block 14 and the steering measuring device 50. As understood from the drawing, the inclined portion 16 of the contact block 14 (14a) contacts, presses, and supports the inner peripheral portion 51 of the steering measuring device 50. The same applies to the other contact blocks 14 (14b, 14c). Also, in addition to the rail portion 12 (see FIG. 2), auxiliary rail portions 18 are formed in parallel on both sides of the rail portion 12. The auxiliary rail portions 18 are formed as concave depressions or through holes on the surface of the main body plate portion 11.

[0038] When the sway during the forward and backward sliding of the contact block 14 (14a, 14b, 14c) occurs, it is restricted by the rail part 12 (12a, 12b, 12c). Further, the sway during the forward and backward sliding of the contact block 14 (14a, 14b, 14c) is suppressed by the auxiliary rail part 18. As understood from FIG. 9, on the side surface side of the inclined part 16 of the contact block 14 (14a), a slidable member fastened by bolts for engaging the contact block 14 (14a) and the auxiliary rail part 18 (main body plate part 11) is appropriately provided. By adding the auxiliary rail part 18 to the rail part 12, the contact block 14 (14a, 14b, 14c) is restricted only in the forward and backward directions. As a result, the accuracy of adjusting the center position of the adjustment mechanism part 20 with respect to the contact block 14 (14a, 14b, 14c) is further enhanced.

[0039] As understood from a series of explanations, in the steering measurement instrument calibration device of the embodiment, by utilizing the contact between the disk contact part provided in the adjustment mechanism part installed at the center thereof and the members having the same cross-sectional diameter of the pressing adjustment part, the contact block can slide with high precision. Therefore, by bringing the contact block into contact with the inner peripheral part of the steering measurement instrument, the position where the steering measurement instrument is placed on the main body plate part of the steering measurement instrument can be adjusted. For this reason, accurately grasping the center of the steering measurement instrument, which was not easy heretofore, has become possible simply by the mechanism of the adjustment mechanism part. As a result, the steering measurement instrument calibration device can contribute to improving the calibration accuracy for the steering measurement instrument.

Explanation of Reference Numerals

[0040] 10 Steering measurement instrument calibration device 11 Main body plate part 12(12a, 12b, 12c) Rail part 13(13a, 13b, 13c) Extrusion member 14(14a, 14b, 14c) Contact block 16 Inclined part 17 Relief hole 18 Auxiliary rail part 20 Adjustment mechanism part 21 Reference axis 22 Inclined surface 23 Outer peripheral part 24 Disc contact part 25 Taper part 26 Pressing adjustment part 31 Handle 33(33a, 33b, 33c) Parallel adjustment block 34 Spring 41 Connection part (bolt) 44 Adjusting spring 50 Steering measuring instrument 51 Inner peripheral part 60 Rotating table R Hexagon wrench

Claims

1. A steering angle measuring instrument calibration device for calibrating a steering angle of a steering angle measuring instrument having an inner periphery and a hollow annular shape, comprising: Steering measurement equipment calibration device, A main body panel portion; A plurality of rails formed radially from the center of the main body panel toward the ends; a contact block that is placed on each of the plurality of rail portions and slides freely between a center portion and an end portion of the main body panel portion to contact the inner peripheral portion of the steering measuring device; a plurality of pushing members for pushing the respective abutment blocks along the rail portions from a center portion of the main body panel portion to an end portion of the main body panel portion; an adjustment mechanism that is disposed at a center of the main body panel and moves all of the plurality of push-out members forward evenly from the center of the main body panel; The contact block is brought into contact with an inner periphery of the steering measuring instrument to adjust the mounting position of the steering measuring instrument on the main body panel of the steering measuring instrument, thereby adjusting the center position of the steering measuring instrument. A steering measuring instrument calibration device characterized by:

2. The adjustment mechanism includes: a reference axis provided vertically to the center of the axial direction of the rail portions in the central portion of the main body panel; a disk contact portion through which the reference shaft is inserted; a pressing adjustment portion through which the reference shaft is inserted, the disk contact portion includes an inclined surface portion that opens upward and expands in diameter in opposition to the reference axis, and an outer circumferential portion that contacts the plurality of extrusion members, The steering measuring instrument calibration device according to claim 1 , wherein the pressing-down adjustment portion has a tapered portion that abuts against the inclined surface portion and presses down the disk abutment portion.

3. 3. The steering measuring instrument calibration device according to claim 2, wherein the adjustment mechanism portion includes a connection portion, and the pressing-down adjustment portion is pressed down on the disk contact portion by tightening the connection portion.

4. 4. A steering measuring instrument calibration device according to claim 1, wherein the plurality of rail portions are formed radially on the main body panel at equal angular intervals, and three of each of the rail portions, the abutment blocks, and the extrusion members are provided.

5. 5. The steering measuring instrument calibration device according to claim 1, wherein the contact block is formed with an inclined portion, the inclined portion contacting an inner periphery of the steering measuring instrument.

6. 6. A steering measuring instrument calibration device according to claim 1, further comprising: three parallel adjustment blocks provided on an outer periphery of the main body panel for supporting the steering measuring instrument by abutting against an inner periphery of the steering measuring instrument and maintaining parallelism of the steering measuring instrument.

7. 7. The steering measuring instrument calibration device according to claim 1, further comprising a spring having one end connected to the push-out member and the other end connected to the contact block.

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