An eccentricity detecting device

Abstract

The application discloses a eccentricity detection device, including product positioning fixture, rotating mechanism located above product positioning fixture, rotating mechanism can lift, product positioning fixture is opened to let place groove, let place groove has left and right displacement module in movable cooperation, left and right displacement module is connected with left and right displacement monitoring device respectively, the extension spring between left displacement monitoring device and left displacement module makes left displacement module have the tendency of right displacement, left displacement module is connected with electromagnetic module, the electromagnetic module after being powered makes left displacement module have the tendency of left displacement; the top of left and right displacement module is respectively provided with left and right probes, and left and right probes can go into the eccentric groove of product. Rotating mechanism drives product to rotate, and left and right probes reflect the eccentricity of product to monitoring device through linear displacement, and provide data support for judging whether the product is qualified.

Description

Technical Field

[0001] The invention relates to processing equipment for automobile seat parts, in particular to processing equipment for adjusters. Background Art

[0002] A recliner for a car seat comprises a left half and a right half. The left half is provided with a first circular recessed structure, the inner wall of which is provided with a first toothed structure. The right half is provided with a third circular protrusion, the outer wall of which is provided with a fifth toothed structure, which is capable of engaging with the first toothed structure. The left half is mounted on the backrest of the car seat, while the right half is mounted on the body of the car seat. The right half is manually or electrically operated to disengage the fifth toothed structure from the first toothed structure, freeing the backrest from being locked to the body of the car seat. The backrest can rotate relative to the body to adjust the tilt angle. Once the right half is in the desired position, the right half is manually or electrically operated to reset the right half. The third protrusion engages with the first recessed structure, and the fifth toothed structure engages with the first toothed structure. The backrest cannot rotate relative to the body, thus locking the backrest in place.

[0003] When a car is hit while driving, the instantaneous impact force causes the backrest to tend to rush forward or tilt backward. If this instantaneous impact force is large enough, it can cause the first tooth-shaped structure to slip relative to the fifth tooth-shaped structure, causing the backrest to actually rush forward or tilt backward, injuring the driver or passengers. To this end, the applicant has improved the left half.

[0004] The left half includes a first disc-shaped member and a second disc-shaped member. The first disc-shaped member has the first recessed structure on its front surface, a first circular protrusion on its back surface, a second tooth-shaped structure on its outer wall, and a small circular protrusion on its first protrusion. The first disc-shaped member defines a first central hole, which passes through the small circular protrusion. The second disc-shaped member has a second recessed structure on its front surface, a second protrusion on its back surface, a third tooth-shaped structure on its inner wall of the second recessed structure, and a fourth tooth-shaped structure on its outer wall of the second protrusion. The second disc-shaped member defines a second central hole, the diameter of which is larger than the outer diameter of the small circular protrusion.

[0005] The second recessed structure of the second disc engages with the first protrusion of the first disc, and the second toothed structure of the first protrusion is in a semi-engaged state with the third toothed structure of the second recessed structure. If the second disc is rotated relative to the first disc, the second disc's motion trajectory forms an irregular annular pattern, and the center of the second disc does not coincide with the center of the first disc, but rather changes with the rotation of the second disc. After the second disc is assembled with the first disc, a pair of crescents and a semicircular ring are installed between the inner wall of the second center hole and the outer wall of the circular protrusion. The pair of crescents and the semicircular ring form a circle around the outer periphery of the circular protrusion, offsetting the center of the second disc from the center of the first disc. A retaining member is then installed in the first center hole. The retaining member comprises a central portion and a radially extending portion. The central portion engages in the first center hole, and the radially extending portion presses against the pair of crescents and the semicircular ring, retaining the retaining member between the inner wall of the second center hole and the outer wall of the circular protrusion.

[0006] An inner hexagonal hole is provided at the center of the limiting component, an outer hexagonal pin component is matched in the inner hexagonal hole, and the outer hexagonal pin component is fixedly connected to the backrest of the car seat.

[0007] The outer edge of the second disc is secured with a weld ring, which is welded to the first disc. This restricts the outer edge of the second disc, preventing axial relative displacement between the two. However, the second disc's freedom of rotation relative to the first is not restricted by the weld ring. Because a pair of crescents and a semicircular ring fill the space between the second center hole and the circular protrusion, the second disc cannot rotate relative to the first. During normal operation of the recliner, the first and second discs do not move relative to each other, acting as a single component.

[0008] When a car is hit while driving, the instantaneous impact force causes the backrest to tend to rush forward or lean back. If this instantaneous impact force is large enough, the first disc-shaped member will rotate relative to the second disc-shaped member before the first tooth-shaped structure slips relative to the fifth tooth-shaped structure. This irregular rotation causes the semicircular ring to break due to the squeezing of the pair of crescents and the second center hole wall. The second disc-shaped member rotates relative to the first disc-shaped member. This rotation is irregular, and due to the restriction of the pair of crescents, the angle of this rotation is small. The second tooth-shaped structure of the first disc-shaped member partially cooperates with the third tooth-shaped structure of the second disc-shaped member, and the first disc-shaped member and the second disc-shaped member are in a stuck state, which limits the backrest from further rushing forward or leaning back. Therefore, the recliner, especially the left half, has the ability to alleviate impact or resist impact, which has a protective effect on the driver or passengers.

[0009] When the welding ring is welded to the first disc-shaped member, the pair of crescents and the semicircular ring have not yet been assembled between the second center hole wall and the circular protrusion. Therefore, the space between the second center hole wall and the circular protrusion needs to be protected to prevent welding slag from entering. To this end, the applicant pre-assembles a pair of crescents and a semicircular ring in the space between the second center hole wall and the circular protrusion. When assembling the limiting member, the two ends of an annular spring (similar in shape to the golden steel ring on Sun Wukong's head) are matched with the pair of crescents to make the pair of crescents tend to move away from each other. In this way, the pair of crescents are clamped in the space between the second center hole wall and the circular protrusion, and at the same time, the semicircular ring is tightened. In the subsequent process, the annular spring, the pair of crescents, the semicircular ring, and the limiting member are removed, and a new pair of crescents, the semicircular ring, the limiting member, and the annular spring are reassembled.

[0010] In order to be welded to the lining plate later, the second convex portion of the second disc-shaped member is provided with three arc-shaped convex portions, the three arc-shaped convex portions are located on the same circle, and there is a gap between two adjacent arc-shaped convex portions. The lining plate is connected to the backrest of the car seat. Summary of the Invention

[0011] The technical problem solved by the present invention is: how to detect the eccentricity of the first disc-shaped member and the second disc-shaped member.

[0012] In order to solve the above technical problems, the present invention provides the following technical solutions: an eccentricity detection device, comprising a product positioning jig and a rotating mechanism located above the product positioning jig, the rotating mechanism being able to rise and fall relative to the product positioning jig, the product positioning jig being provided with a clearance groove, a left displacement module and a right displacement module being movably fitted in the clearance groove, the left displacement module being connected to a left displacement monitoring device, the right displacement module being connected to a right displacement monitoring device, a left telescopic spring being provided between the left displacement monitoring device and the left displacement module, the left telescopic spring causing the left displacement module to have a tendency to displace rightward, the left displacement module being connected to an electromagnetic module, the electromagnetic module being energized causing the left displacement module to have a tendency to displace leftward; a left probe being provided on the top of the left displacement module, and a right probe being provided on the top of the right displacement module, the left probe and the right probe being able to penetrate into between the inner wall of the second center hole of the second disc-shaped member and the outer wall of the circular small protrusion of the first disc-shaped member.

[0013] The left telescopic spring causes the left displacement module to offset the right displacement module. The second disc is first positioned on the product positioning fixture. The first disc fits onto the second disc. The right probe extends into the second center hole of the second disc and is close to the outer wall of the circular protrusion of the first disc. The left probe extends into the second center hole of the second disc and is close to the inner wall of the second center hole. Afterwards, the rotating mechanism descends, pressing on the first disc. Afterwards, the electromagnetic module is energized, and under the action of electromagnetic attraction, the left displacement module has a tendency to shift to the left. Afterwards, the rotating mechanism rotates, driving the first and second discs to rotate. Because the center of the second disc deviates from the center of the first disc, the annular structure formed by the second center hole and the circular protrusion is an irregular structure, narrow in some places and wide in others. The left and right probes are located in this annular structure. As the first disc-shaped member and the second disc-shaped member rotate, the distance between the left probe and the right probe will change. This change is transmitted to the left displacement module. The left displacement monitoring device monitors the displacement of the left displacement module through the displacement sensor and displays it to the detector through the display device.

[0014] The center of the first disc is positioned by a rotating mechanism, and the first and second discs rotate around the center of the first disc. If the circular protrusion is regularly shaped and its center coincides with the center of the first disc, the right probe will not be displaced. If the circular protrusion is irregularly shaped or its center does not coincide with the center of the first disc, the right probe will be displaced. This displacement is transmitted to the right displacement module, and the right displacement monitoring device monitors the displacement of the right displacement module via a displacement sensor and displays it to the tester via a display device.

[0015] The detection device of the present invention can detect the eccentricity of the first disc-shaped member and the second disc-shaped member, as well as the variation range of the eccentricity, and provide data support for judging whether the first disc-shaped member and the second disc-shaped member are qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 is a schematic diagram of an eccentricity detection device;

[0018] Figure 2 for Figure 1 A schematic diagram of the rotating unit 53;

[0019] Figure 3 for Figure 1 A schematic diagram of the middle rotating unit 53 from another perspective;

[0020] Figure 4 A schematic diagram of a product positioning fixture 10;

[0021] Figure 5 A three-dimensional diagram of the product positioning fixture 10.

[0022] Explanation of symbols in the figure:

[0023] 10. Product positioning fixture; 101. Clearance slot; 11. Support column; 12. Fixture base; 13. Vertical plate; 14. Guide rails mounted on the fixture base and slidingly engaged with the left and right displacement modules;

[0024] 21. Left displacement module; 211. Left probe; 22. Right displacement module; 221. Right probe; 223. Circular small convex positioning hole; 23. Left telescopic spring; 24. Electromagnetic module; 241. Telescopic sleeve;

[0025] 31. Left displacement monitoring device; 32. Right displacement monitoring device;

[0026] 50. Rotating mechanism; 51. Lifting module; 52. Motor; 53. Rotating unit; 531. Top disc-shaped member; 532. Bottom disc-shaped member; 533. Elastic member; 534. Positioning groove; 54. Vertical template; 55. Lifting cylinder; 56. Crossbeam; 57. Vertical bracket. DETAILED DESCRIPTION

[0027] like Figure 1 、 Figure 5 A device for detecting eccentricity includes a product positioning fixture 10 and a rotating mechanism 50 located above the product positioning fixture. The rotating mechanism can be raised and lowered relative to the product positioning fixture. The product positioning fixture is provided with a clearance groove 101. A left displacement module 21 and a right displacement module 22 are movably matched in the clearance groove. The left displacement module is connected to a left displacement monitoring device 31, and the right displacement module is connected to a right displacement monitoring device 32. A left telescopic spring 23 is provided between the left displacement monitoring device and the left displacement module. The left telescopic spring makes the left displacement module have a tendency to displace to the right. The left displacement module is connected to an electromagnetic module 24. When energized, the electromagnetic module makes the left displacement module have a tendency to displace to the left; a left probe 211 is provided on the top of the left displacement module, and a right probe 221 is provided on the top of the right displacement module. The left probe and the right probe can penetrate between the inner wall of the second center hole of the second disc-shaped member and the outer wall of the circular small protrusion of the first disc-shaped member.

[0028] The left telescopic spring 23 forces the left displacement module 21 against the right displacement module 22, allowing the right probe 221 and the left probe 211 to penetrate smoothly between the inner wall of the second disk's second center hole and the outer wall of the first disk's circular protrusion. The second disk is first positioned on the product positioning jig 10. The first disk fits onto the second disk. The right probe 221 extends into the second disk's second center hole and abuts the outer wall of the first disk's circular protrusion. The left probe 211 extends into the second disk's second center hole and abuts the inner wall of the second center hole. The rotation mechanism 50 then descends, pressing against the first disk, aligning its rotation center with the center of the first disk. The electromagnetic module 24 is then energized. Under the electromagnetic attraction, the left displacement module 21 overcomes the elastic force of the left telescopic spring 23 and tends to move leftward. The rotation mechanism 50 then rotates, driving the first and second disks to rotate. Because the center of the second disc is offset from the center of the first disc, the annular structure formed by the second center hole and the circular protrusion is irregular, with some areas narrower and others wider along its circumference. The left probe 211 and the right probe 221 are located within this annular structure. As the first and second discs rotate, the distance between the left and right probes changes, and this change is transmitted to the left displacement module 21. The left displacement monitoring device 31 monitors the displacement of the left displacement module via a displacement sensor and displays it to the operator via a display device.

[0029] The center of the first disc is positioned by the rotating mechanism 50, and the first and second discs rotate around the center of the first disc. If the circular protrusions are regularly shaped and their centers coincide with the center of the first disc, the right probe 221 will not be displaced. If the circular protrusions are irregularly shaped or their centers do not coincide with the center of the first disc, the right probe 221 will be displaced. This displacement is transmitted to the right displacement module 22. The right displacement monitoring device 32 monitors the displacement of the right displacement module via a displacement sensor and displays it to the tester via a display device.

[0030] like Figure 5 The top of the right displacement module 22 defines a circular protrusion positioning hole 223, into which the circular protrusion of the first disc fits. If the circular protrusion is regularly shaped and its center coincides with the center of the first disc, then, when the rotating mechanism 50 rotates, the circular protrusion of the first disc rotates within the circular protrusion positioning hole 223, and the right displacement module 22 does not shift. If the circular protrusion is irregularly shaped or its center does not coincide with the center of the first disc, the right displacement module 22 shifts, which can be detected by the right displacement monitoring device 32.

[0031] The product positioning jig 10 is provided with a plurality of support columns 11 , which can support the second disc-shaped member and prop up the second disc-shaped member. However, the second disc-shaped member can translate relative to the support columns 11 .

[0032] The product positioning jig 10 is mounted on a jig base 12. The left and right displacement monitoring devices 31 and 32 are mounted on the jig base. The left and right displacement modules 21 and 22 are movably mounted on the jig base. A vertical plate 13 is provided on the jig base, and the electromagnetic module 24 is mounted on the vertical plate. A telescopic sleeve 241 is provided over the electromagnetic module 24, protecting the electromagnet of the electromagnetic module 24.

[0033] like Figure 1 The rotating mechanism 50 includes a motor 52 mounted on a lifting module 51 and a rotating unit 53 connected to the motor shaft. The lifting module is movably fitted on a vertical template 54. The vertical template is provided with a lifting cylinder 55 connected to the lifting module 51. The vertical template is mounted on a crossbeam 56, and the crossbeam is supported by a pair of vertical brackets 57. A pair of vertical brackets 57 are mounted on the work surface, and the fixture base plate 12 is mounted on the work surface. The rotating unit 53 is pressed against the first disc-shaped member on the product positioning fixture 10. After the first disc-shaped member and the second disc-shaped member are positioned on the product positioning fixture 10, the lifting cylinder 55 drives the lifting module 51 and the rotating unit 53 to descend, and the rotating unit 53 is pressed against the first disc-shaped member.

[0034] Combine Figure 2 、 Figure 3 The rotating unit 53 includes a top disc 531 and a bottom disc 532. An elastic member 533 is disposed between the top and bottom discs. A positioning groove 534 is provided on the bottom surface of the bottom disc, which engages with the convex structure at the top of the first disc. The bottom disc 532 can move upward, causing the elastic member 533 to accumulate elastic potential energy. The presence of the elastic member 533: first, enables the bottom disc 532 to press against the first disc, which in turn presses against the second disc. Thus, driven by the bottom disc, the first and second discs rotate accordingly; second, it enables the second disc to translate along the support columns 11. During the rotation of the first disc driven by the bottom disc 532, the positioning groove 534 engages with the convex structure of the first disc, preventing slippage between the first and bottom discs 532.

[0035] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An eccentricity detection device, comprising a product positioning jig (10) and a rotating mechanism (50) located above the product positioning jig, wherein the rotating mechanism can be raised and lowered relative to the product positioning jig, and wherein: The product positioning fixture is provided with a displacement groove (101), in which a left displacement module (21) and a right displacement module (22) are movably matched. The left displacement module is connected to a left displacement monitoring device (31), and the right displacement module is connected to a right displacement monitoring device (32). A left telescopic spring (23) is provided between the left displacement monitoring device and the left displacement module. The left telescopic spring makes the left displacement module have a tendency to displace rightward. The left displacement module is connected to an electromagnetic module (24). When energized, the electromagnetic module makes the left displacement module have a tendency to displace leftward. A left probe (211) is provided on the top of the left displacement module, and a right probe (221) is provided on the top of the right displacement module. The left probe and the right probe can penetrate between the inner wall of the second center hole of the second disc-shaped component and the outer wall of the circular small protrusion of the first disc-shaped component.

2. The eccentricity detection device according to claim 1, wherein: A circular small convex positioning hole (223) is provided on the top of the right displacement module (22).

3. The eccentricity detection device according to claim 1, wherein: A plurality of support columns (11) are provided on the product positioning jig (10), and the plurality of support columns can support the second disc-shaped member.

4. The eccentricity detection device according to claim 1, wherein: The product positioning jig (10) is arranged on a jig base plate (12), a left displacement monitoring device (31) and a right displacement monitoring device (32) are mounted on the jig base plate, a left displacement module (21) and a right displacement module (22) are movably arranged on the jig base plate, a vertical plate (13) is provided on the jig base plate, and the electromagnetic module (24) is mounted on the vertical plate.

5. The eccentricity detection device according to claim 1, wherein: The rotating mechanism (50) includes a motor (52) mounted on a lifting module (51) and a rotating unit (53) connected to the motor shaft. The lifting module is movably engaged with a vertical template (54). The vertical template is provided with a lifting cylinder (55) connected to the lifting module (51). The vertical template is mounted on a crossbeam (56), which is supported by a pair of vertical brackets (57).

6. The eccentricity detection device according to claim 5, characterized in that: The rotating unit (53) comprises a top disc-shaped member (531) and a bottom disc-shaped member (532), an elastic member (533) is provided between the top disc-shaped member and the bottom disc-shaped member, and a positioning groove (534) is provided on the bottom surface of the bottom disc-shaped member, and the positioning groove can cooperate with the convex structure on the top of the first disc-shaped member.

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