CN218161145U

CN218161145U - Silencing structure for clock spring

Info

Publication number: CN218161145U
Application number: CN202221472439.0U
Authority: CN
Inventors: 徐宇
Original assignee: SHANGHAI YINGZHI AUTOMOBILE ELECTRONICS CO Ltd
Current assignee: SHANGHAI YINGZHI AUTOMOBILE ELECTRONICS CO Ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-12-27
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses an amortization structure for clock spring, this structure includes clock spring's rotor mechanism and stator mechanism, rotor mechanism lock in stator mechanism still includes the slip ring, rotor mechanism is equipped with the mounting hole along the circumferencial direction interval with stator mechanism's lock face, slip ring inner circle surface interval is equipped with boss, outer lane bottom surface and is the glide plane to the slip ring inner circle is the annular groove with the outer lane middle part, the boss card is gone into in the mounting hole, the glide plane support lean on extremely stator mechanism's surface and form sliding connection with stator mechanism. This amortization structure overcomes traditional clock spring rotor and stator axial clearance fit's defect, and its simple structure, the equipment is convenient, improves clock spring stator and rotor complex tolerance problem, eliminates striking sound and cooperation jamming between the two, improves and drives and takes experience.

Description

Silencing structure for clock spring

Technical Field

The utility model relates to an automobile manufacturing technical field especially relates to an amortization structure for clock spring.

Background

Clock springs are electrical swivel connections for automotive steering wheel airbags and their control systems, which are typically mounted below the steering wheel, above the combination switch base or the steering column tray. The clock spring is generally provided with a base, a shell is added on the base to form a stator mechanism, a face cover is added on the upper part of the shell, a pulling block is arranged at the lower end of the base, and the face cover and the pulling block are fastened to form a rotor mechanism. The stator mechanism and the rotor mechanism are matched to form an internal cavity, and a rotating wheel frame mechanism with rollers or an elastic belt structure forming a driving device is arranged in the cavity to realize free rotation of the cable. The axial clearance arrangement of the clock spring rotor mechanism and the stator mechanism is particularly critical, the clearance is too large, the rotor shakes seriously in the stator cavity, and the impact sound is large; if the clearance is too small, the rotation may be blocked or even locked at high or low temperature. At present, the mainstream design usually ensures the clearance by controlling the size, and the clearance is generally required to be 0.2-0.3 mm. However, the small gap has higher requirements on the manufacture of parts, the flatness of the sliding matching surface and the like, and the manufacturing cost of products is improved; in addition, the stator and the rotor are usually large and made of plastic parts, and are easy to generate retardation or blocking phenomenon in cooperation in a deformation state; if the clearance is enlarged, the clearance is too loose, and when the rotor rotates along with the steering wheel, the rotor irregularly impacts the stator to generate abnormal noise, so that the driving experience is seriously influenced, and the trust of customers is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem that a amortization structure for clock spring is provided, traditional clock spring rotor and stator axial clearance fit's defect is overcome to this amortization structure, its simple structure, and the equipment is convenient, improves clock spring stator and rotor complex tolerance problem, eliminates striking sound and cooperation jamming between the two, improves and drives and take experience.

For solving the technical problem, the utility model discloses an amortization structure for clock spring includes clock spring's rotor mechanism and stator mechanism, rotor mechanism lock in stator mechanism still includes the slip ring, rotor mechanism is equipped with the mounting hole along the circumferencial direction interval with stator mechanism's lock face, slip ring inner circle surface interval is equipped with boss, outer lane bottom surface and is the glide plane to the slip ring inner circle is the annular groove with the outer lane middle part, the boss card is gone into in the mounting hole, the glide plane support lean on extremely stator mechanism's surface and form sliding connection with stator mechanism.

Further, the cross-sectional shape of the mounting hole is matched with that of the boss.

Furthermore, this sound-absorbing structure still includes the little muscle of conquassation, the little muscle interval of conquassation is located the side of mounting hole.

Because the utility model discloses an amortization structure for clock spring has adopted above-mentioned technical scheme, this structure includes clock spring's rotor mechanism and stator mechanism promptly, rotor mechanism lock in stator mechanism still includes the slip ring, rotor mechanism is equipped with the mounting hole along the circumferencial direction interval with the lock face of stator mechanism, slip ring inner circle surface interval is equipped with boss, outer lane bottom surface and is the glide plane to the slip ring inner circle is the annular groove with the outer lane middle part, the boss card is gone into in the mounting hole, the glide plane support lean on extremely stator mechanism's surface and form sliding connection with stator mechanism. This amortization structure overcomes traditional clock spring rotor and stator axial clearance fit's defect, and its simple structure, the equipment is convenient, improves clock spring stator and rotor complex tolerance problem, eliminates striking sound and cooperation jamming between the two, improves and drives and take experience.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

FIG. 1 is a schematic view of the noise reduction structure for the clock spring of the present invention;

FIG. 2 is a schematic view of a fastening surface of a rotor mechanism in the noise reduction structure;

FIG. 3 is an enlarged view of the portion A of FIG. 2;

fig. 4 is a schematic view of the slip ring in the sound-deadening structure.

Detailed Description

Embodiment is shown in fig. 1 to 4, the utility model discloses a amortization structure for clock spring includes clock spring's rotor mechanism 2 and stator mechanism 1, rotor mechanism 2 lock in stator mechanism 1 still includes slip ring 3, rotor mechanism 2 is equipped with mounting hole 22 along the circumferencial direction interval with stator mechanism 1's buckled

face

21, 3 inner circle surface intervals of slip ring are equipped with boss 31, outer lane bottom surface are the glide plane 32 to 3 inner circles of slip ring are annular groove 33 with the outer lane middle part, boss 31 card is gone into in the mounting hole 22, glide plane 32 support lean on extremely stator mechanism 1's surface and form sliding connection with stator mechanism 1.

Preferably, the cross-sectional shape of the mounting hole 22 matches the cross-sectional shape of the boss 31. The boss is conveniently clamped in the mounting hole,

preferably, the sound attenuation structure further comprises small crushing ribs 23, and the small crushing ribs 23 are arranged on the side surfaces of the mounting holes 22 at intervals. The small crushing ribs are used for improving the binding force of the boss clamped in the mounting hole and preventing the sliding ring from falling off.

The silencing structure is characterized in that a sliding ring with a buffering function is additionally arranged between a stator mechanism and a rotor mechanism, the sliding ring is arranged on the rotor mechanism through a boss and synchronously rotates with the rotor mechanism, and the sliding ring is in rotating fit with the surface of the stator structure through a sliding surface on the bottom surface of an outer ring; and an annular groove is arranged between the inner ring and the outer ring of the sliding ring, the annular groove can deform under the stress state to play a role in buffering, and the initial state can be recovered after the force is cancelled.

Slip ring simple to operate among this sound-absorbing structure only needs to go into the boss card of slip ring in the mounting hole of rotor mechanism clamping surface can, when rotor mechanism when rotating along with the steering wheel, even at peripheral tubular column, steering wheel and combination switch's action in-process, also can adapt to receive extrusion force, pulling force, yawing force to and with the influence of factors such as tubular column axiality, avoid producing unusual sound, thereby improve and drive and take advantage of experience.

Claims

1. The utility model provides a amortization structure for clock spring, includes clock spring's rotor mechanism and stator mechanism, the rotor mechanism lock in stator mechanism, its characterized in that: still include the slip ring, rotor mechanism is equipped with the mounting hole along the circumferencial direction interval with the lock face of stator mechanism, slip ring inner circle surface interval is equipped with boss, outer lane bottom surface and is the glide plane to the slip ring inner circle is the annular groove with the outer lane middle part, the boss card is gone into in the mounting hole, the glide plane support lean on extremely stator mechanism's surface forms sliding connection with stator mechanism.

2. The noise canceling structure for a clock spring according to claim 1, wherein: the cross section shape of the mounting hole is matched with that of the boss.

3. The noise canceling structure for a clock spring according to claim 1 or 2, wherein: the noise reduction structure further comprises small crushing ribs which are arranged on the side face of the mounting hole at intervals.