Special jig for measuring tire noise

Abstract

The utility model relates to the field of tire testing, and discloses a special jig for tire noise measurement, which comprises basic section bars and a short rod, three groups of basic section bars are fixed at the bottom of the short rod, a cross rod is horizontally fixed among the tops behind the basic section bars, a stand column is mounted at the center of the top end of the cross rod, and a clamping groove is formed in the top end of the stand column. And a main sliding sleeve is movably connected to the center of the stand column, and third bolts are in threaded connection with upper and lower screw holes in the front end of the main sliding sleeve correspondingly. According to the special jig for measuring the tire noise, the upper microphone is assembled on the surface of the fixed rod, can slide along the limiting rod along with the fixed rod and the positioning sliding sleeve, slides along the inclined rod by virtue of the inclined sliding sleeve, locks the positioning sliding sleeve by virtue of the fifth bolt and locks the inclined sliding sleeve by virtue of the second bolt, so that the upper microphone is attached to the tops of the two sides of a tire; the transverse sliding sleeve is also locked by the first bolt, the longitudinal sliding sleeve is vertically lifted through the fourth bolt, the lower microphone is attached to the bottoms of the two sides of the tire, and the problem that the balance of the jig is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire testing, in particular to a special jig for measuring tire noise. Background Art

[0002] Tire noise is also known as tire noise. When the tires rotate with the car's drive shaft, they will produce friction with the ground, and then guide the car forward, backward or turning. While generating friction, a certain amount of noise will be generated. The size of the tire noise will spontaneously change according to whether the road surface is flat or uneven, that is, it depends on the road conditions.

[0003] Tires need to be tested for tire noise before they leave the factory, and the quality of the tire is determined by the detected noise level. However, previous special jigs for this type of tire have poor balance, weak connection strength between various structures, and the location of the measured noise varies. The noise results also have errors, making it difficult to make a standardized judgment on tire quality.

[0004] Now, a new type of special fixture for tire noise measurement is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a special jig for measuring tire noise, so as to solve the problem of poor balance of the jig proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a special jig for measuring tire noise, comprising a basic profile and a short rod, wherein three groups of basic profiles are fixed on the bottom of the short rod, and a cross rod is horizontally fixed between the top of the rear of the basic profile, a column is installed at the center of the top of the cross rod, and a main sliding sleeve is movably connected at the center of the column, and bolt three is threadedly connected in the upper and lower screw holes at the front end of the main sliding sleeve, and oblique rods are respectively fixedly connected on both sides of the main sliding sleeve, and the oblique rod is movably sleeved on the outside of the oblique sleeve, and bolt two is threadedly connected in the screw hole at the front end of the oblique sliding sleeve, a limiting rod is welded on the side of the oblique sliding sleeve, and a positioning sleeve is movably connected on the outside of the limiting rod, and bolt five is threadedly connected in the screw hole at the rear of the positioning sliding sleeve, a fixing rod is fixed between the front and rear of the positioning sliding sleeve, and an upper microphone is installed on the surface of the fixing rod, support rods are respectively fixed on both sides of the top of the short rod, and a top plate is fixed between the top ends of the support rods, and a handle is installed on the top plate.

[0007] Preferably, the main sliding sleeve can be vertically lifted and lowered along the surface of the column, and the oblique sliding sleeve can slide back and forth along the surface of the oblique rod.

[0008] Preferably, the two sides of the outside of the horizontal rod are respectively sleeved with horizontal sleeves, and the screw hole at the front end of the horizontal sleeve is threadedly connected to bolt one, the rear of the horizontal sleeve is longitudinally welded with a vertical rod, and the outside of the vertical rod is sleeved with a longitudinal sleeve, and the rear screw hole of the longitudinal sleeve is threadedly connected to bolt four, a connecting rod is fixed between the front and rear of the interior of the longitudinal sleeve, and a lower microphone is mounted on the connecting rod.

[0009] Preferably, the transverse sliding sleeve can slide left and right along the transverse rod, and the longitudinal sliding sleeve can slide vertically along the outer wall of the vertical rod.

[0010] Preferably, an insertion rod is fixed at the rear center of the main sliding sleeve, a wheel hub is movably inserted behind the insertion rod, and a tire is installed on the outside of the wheel hub.

[0011] Preferably, the tire can rotate together with the wheel hub, and the insertion rod is attached to the front end of the center of the wheel hub.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the tire noise measurement jig not only determines the four monitoring positions of the microphone and maintains the balance of the structure, but also prevents the jig from separating from the tire to be tested;

[0013] (1) An upper microphone is mounted on the surface of the fixed rod. The main sleeve is first moved vertically along the column and reinforced with bolt three. A lower microphone is mounted on the connecting rod. The upper microphone can slide along the limit rod along with the fixed rod and the positioning sleeve, and the angle between the limit rod and the oblique rod is about 45 degrees. The upper microphone continues to slide along the oblique rod with the oblique sleeve. The positioning sleeve is locked with bolt five, and the oblique sleeve is locked with bolt two, so that the upper microphone fits on the top of both sides of the tire. The horizontal sleeves on both sides of the bottom are also locked with bolt one. Then, the longitudinal sleeve on the outer side of the vertical rod is vertically lifted and lowered with bolt four, so that the lower microphone fixed on the connecting rod fits on the bottom of both sides of the tire, so as to avoid the monitoring position being different and affecting the detection results.

[0014] (2) By movably connecting the main sliding sleeve at the center of the column, the short rod and the rear crossbar are symmetrically fixed on the top of the three basic profiles, and then combined with the support rod and the top plate above the column, the main frame of the fixture can be prevented from shaking or tipping over. The oblique rods are symmetrically fixed on both sides of the main sliding sleeve, which not only maintains the stability of the main sliding sleeve during movement, but also can synchronously adjust the height of the upper microphones on both sides, and cooperate with the lower microphones on both sides of the bottom to detect tire noise in a thoughtful and stable manner;

[0015] (3) By fixing a plug rod at the rear center of the main sleeve, the plug rod fixed at the rear center of the main sleeve is also in contact with the center of the wheel hub. When the wheel hub rotates in place under the guidance of the automobile transmission mechanism, the vibration is transmitted to the entire fixture through the plug rod and the main sleeve, and is also transmitted to the four sets of sound collecting devices at the top, bottom, left and right. The entire tire noise of the tire can be accurately and finely monitored, and whether the assembly position of the fixture is in contact with the tire and the wheel hub can be subjectively observed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a front view structural diagram of the utility model;

[0018] Figure 3 For the utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0019] Figure 4 This is a side structural diagram of the present utility model;

[0020] Figure 5 It is a schematic diagram of the top structure of the utility model.

[0021] In the figure: 1. Basic profile; 2. Short rod; 3. Support rod; 4. Lower microphone; 5. Horizontal slide; 6. Cross rod; 7. Bolt one; 8. Longitudinal slide; 9. Vertical rod; 10. Connecting rod; 11. Tire; 12. Oblique slide; 13. Bolt two; 14. Oblique rod; 15. Positioning slide; 16. Limit rod; 17. Upper microphone; 18. Top plate; 19. Handle; 20. Wheel hub; 21. Fixing rod; 22. Insert rod; 23. Main slide; 24. Column; 25. Bolt three; 26. Bolt four; 27. Bolt five. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-5A special jig for measuring tire noise includes a basic profile 1 and a short rod 2. Three groups of basic profiles 1 are fixed to the bottom of the short rod 2, and a cross bar 6 is fixed horizontally between the top of the rear of the basic profile 1. A column 24 is installed at the center of the top of the cross bar 6, and a main sliding sleeve 23 is movably connected to the center of the column 24. Bolts 25 are respectively threaded in the upper and lower screw holes at the front end of the main sliding sleeve 23. The two sides of the main sliding sleeve 23 are respectively fixedly connected with oblique rods 14, and the outer part of the oblique rod 14 is movably sleeved with an oblique sliding sleeve 12. The oblique sliding sleeve 1 2. A second bolt 13 is threadedly connected to the screw hole at the front end. A limit rod 16 is welded to the side of the oblique sliding sleeve 12, and the outside of the limit rod 16 is movably connected to the positioning sliding sleeve 15. A fifth bolt 27 is threadedly connected to the screw hole at the rear of the positioning sliding sleeve 15. A fixing rod 21 is fixed between the front and rear of the positioning sliding sleeve 15, and the surface of the fixing rod 21 is equipped with an upper microphone 17. Support rods 3 are fixed to both sides of the top of the short rod 2, and a top plate 18 is fixed between the top ends of the support rods 3. A handle 19 is installed on the top plate 18.

[0024] The main sliding sleeve 23 can be lifted and lowered vertically along the surface of the column 24, and the oblique sliding sleeve 12 can slide back and forth along the surface of the oblique rod 14;

[0025] Specifically, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, first move the main sleeve 23 vertically along the column 24 and reinforce it with bolt three 25. A lower microphone 4 is installed on the connecting rod 10. The upper microphone 17 can slide along the limit rod 16 with the fixing rod 21 and the positioning sleeve 15, and the angle between the limit rod 16 and the oblique rod 14 is about forty-five degrees. Continue to slide along the oblique rod 14 with the help of the oblique sleeve 12, and lock the positioning sleeve 15 with bolt five 27, and lock the oblique sleeve 12 with bolt two 13, so that the upper microphone 17 is attached to the top of both sides of the tire 11, and the horizontal sleeves 5 on both sides of the bottom are also locked by bolt one 7. Then, use bolt four 26 to vertically lift the longitudinal sleeve 8 on the outside of the vertical rod 9, and attach the lower microphone 4 fixed on the connecting rod 10 to the bottom of both sides of the tire 11, so that tire noise detection is performed on the rotating tire 11 from four directions.

[0026] Example 2: Horizontal sleeves 5 are respectively sleeved on both sides of the exterior of the horizontal bar 6, and a bolt 7 is threadedly connected to the screw hole at the front end of the horizontal sleeve 5. A vertical rod 9 is welded longitudinally to the rear of the horizontal sleeve 5, and a longitudinal sleeve 8 is sleeved on the exterior of the vertical rod 9. A bolt 26 is threadedly connected to the rear screw hole of the longitudinal sleeve 8. A connecting rod 10 is fixed between the front and rear of the longitudinal sleeve 8, and the lower microphone 4 is mounted on the connecting rod 10. The horizontal sleeve 5 can slide left and right along the horizontal bar 6, and the longitudinal sleeve 8 can slide vertically along the outer wall of the vertical rod 9.

[0027] Specifically, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the short rod 2 and the rear cross bar 6 are symmetrically fixed on the top of the three basic profiles 1, and then cooperate with the support rod 3 and the column 24 to fix the top plate 18 above, which can prevent the main frame of the fixture from shaking or tipping over, and the inclined rods 14 are symmetrically fixed on both sides of the main sliding sleeve 23, which not only maintains the stability of the main sliding sleeve 23 during movement, but also can synchronously adjust the height of the upper microphones 17 on both sides. The two inclined rods 14 are inclined at forty-five degrees, which can maintain the stability of the upper microphone 17 during installation.

[0028] Example 3: A rod 22 is fixed at the rear center of the main sliding sleeve 23. A wheel hub 20 is movably connected to the rear of the rod 22. A tire 11 is mounted on the outside of the wheel hub 20. The tire 11 can rotate with the wheel hub 20. The rod 22 is attached to the front end of the center of the wheel hub 20.

[0029] Specifically, if Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the insertion rod 22 fixed at the rear center of the main sleeve 23 fits exactly in the center of the wheel hub 20. When the wheel hub 20 rotates in place under the guidance of the automobile transmission mechanism, the vibration is transmitted to the entire fixture through the insertion rod 22 and the main sleeve 23, and is also transmitted to the four groups of sound collecting devices above, below, left and right, so as to accurately and finely monitor the entire tire noise of the tire 11.

[0030] Working principle: When the present invention is in use, first, the main sleeve 23 is moved vertically along the column 24 and reinforced with bolt three 25. The lower microphone 4 is installed on the connecting rod 10, and the upper microphone 17 can slide along the limit rod 16 along the fixing rod 21 and the positioning sleeve 15, and the angle between the limit rod 16 and the oblique rod 14 is about forty-five degrees. Continue to slide along the oblique rod 14 with the help of the oblique sleeve 12, and lock the positioning sleeve 15 with bolt five 27, and lock the oblique sleeve 12 with bolt two 13, so that the upper microphone 17 fits the top of both sides of the tire 11, and the horizontal sleeves 5 on both sides of the bottom are also locked by bolt one 7, and then the longitudinal sleeve 8 on the outside of the vertical rod 9 is vertically lifted and lowered with bolt four 26, so that the lower microphone 4 fixed on the connecting rod 10 fits the bottom of both sides of the tire 11 Because the short rod 2 and the rear cross bar 6 are symmetrically fixed on the top of the three basic profiles 1, and the top plate 18 above is fixed with the support rod 3 and the column 24, the main frame of the fixture can be prevented from shaking or tipping over, and the oblique rod 14 is symmetrically fixed on both sides of the main sleeve 23, which not only maintains the stability of the main sleeve 23 during movement, but also can synchronously adjust the height of the upper microphone 17 on both sides, and cooperate with the lower microphone 4 on both sides of the bottom to detect tire noise thoughtfully and stably. The insertion rod 22 fixed at the rear center of the main sleeve 23 just fits the center of the wheel hub 20. When the wheel hub 20 rotates in place under the guidance of the automobile transmission mechanism, the vibration is transmitted to the fixture as a whole through the insertion rod 22 and the main sleeve 23, and also transmitted to the four groups of sound collecting devices above, below, left and right, accurately and finely monitoring all the tire noise of the tire 11.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A special jig for measuring tire noise, comprising a base profile (1) and a short rod (2), characterized in that: Three groups of basic profiles (1) are fixed to the bottom of the short rod (2), and a crossbar (6) is fixed horizontally between the tops of the rear of the basic profiles (1). A column (24) is installed at the center of the top of the crossbar (6), and a main sliding sleeve (23) is movably connected to the center of the column (24). The upper and lower screw holes at the front end of the main sliding sleeve (23) are respectively threadedly connected with three bolts (25). The two sides of the main sliding sleeve (23) are respectively fixedly connected with oblique rods (14), and the outer part of the oblique rod (14) is movably sleeved with an oblique sliding sleeve (12). The screw holes at the front end of the oblique sliding sleeve (12) are threadedly connected with bolts. Second (13), a limiting rod (16) is welded to the side of the oblique sliding sleeve (12), and the outer movability of the limiting rod (16) is connected to the positioning sliding sleeve (15), and a bolt five (27) is threadedly connected in the screw hole at the rear of the positioning sliding sleeve (15), a fixing rod (21) is fixed between the front and rear of the interior of the positioning sliding sleeve (15), and an upper microphone (17) is installed on the surface of the fixing rod (21), support rods (3) are fixed on both sides of the top of the short rod (2), and a top plate (18) is fixed between the top ends of the support rods (3), and a handle (19) is installed on the top plate (18).

2. The tire noise measurement tool according to claim 1, characterized in that: The main sliding sleeve (23) can be vertically lifted and lowered along the surface of the column (24), and the oblique sliding sleeve (12) can slide back and forth along the surface of the oblique rod (14).

3. The tire noise measurement tool according to claim 1, characterized in that: The two sides of the outside of the crossbar (6) are respectively sleeved with a transverse sleeve (5), and a bolt (7) is threadedly connected in the screw hole at the front end of the transverse sleeve (5). A vertical rod (9) is longitudinally welded to the rear of the transverse sleeve (5), and a longitudinal sleeve (8) is sleeved on the outside of the vertical rod (9), and a bolt (26) is threadedly connected in the screw hole at the rear of the longitudinal sleeve (8). A connecting rod (10) is fixed between the front and rear of the interior of the longitudinal sleeve (8), and a lower microphone (4) is mounted on the connecting rod (10).

4. The tire noise measurement tool according to claim 3, characterized in that: The transverse sliding sleeve (5) can slide left and right along the transverse rod (6), and the longitudinal sliding sleeve (8) can slide vertically along the outer wall of the vertical rod (9).

5. The tire noise measurement tool according to claim 1, characterized in that: A plug rod (22) is fixed at the rear center of the main sliding sleeve (23), a wheel hub (20) is arranged behind the plug rod (22), and a tire (11) is mounted on the outside of the wheel hub (20).

6. The tire noise measurement tool according to claim 5, characterized in that: The tire (11) can rotate together with the wheel hub (20), and the insertion rod (22) is attached to the front end of the center of the wheel hub (20).

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