CN212796783U

CN212796783U - Anti-reverse locking safety belt retractor

Info

Publication number: CN212796783U
Application number: CN202021864332.1U
Authority: CN
Inventors: 王超
Original assignee: Changzhou Dynasty Bicycle Industry Co ltd
Current assignee: Changzhou Dynasty Bicycle Industry Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-03-26
Anticipated expiration: 2030-08-31

Abstract

The utility model provides an anti-reverse locking safety belt retractor, which comprises a frame, a scroll and a locking mechanism, wherein the scroll is rotatably inserted in the frame, the locking mechanism is arranged at one end of the scroll, the locking mechanism comprises a ratchet wheel, locking board and inertia piece, the ratchet can establish the one end at the spool relatively rotationally, the locking board lid is established on the ratchet, inertia piece rotationally installs in the ratchet, the inside fixed mounting of ratchet has the dog, the dog is close to the inner wall setting of ratchet, the one end of inertia piece is close to the dog setting, the internal surface of locking board is provided with the stand, the centre bore has been seted up on the stand, the stand passes through the centre bore and links to each other with the spool is concentric, the cover is equipped with the jump ring on the stand, the jump ring is circular open structure, the open end of jump ring is equipped with the pole of holding of supporting of "L" shape structure, the vertical end of supporting the pole sets up with the internal surface of locking board is perpendicular.

Description

Anti-reverse locking safety belt retractor

Technical Field

The utility model relates to a coiler technical field especially relates to an anti-locking safety belt coiler.

Background

The seatbelt retractor is a seatbelt device attached to a vehicle, and is capable of locking a seatbelt inside when the vehicle collides, preventing the seatbelt from being continuously pulled out, and preventing a passenger from flying out of a seat. At present, the rewinding speed of retractor safety belts on the market is high, a reel and a ratchet wheel can stop rotating instantly after the rewinding of the safety belts is finished, and an inertia block can continue to rotate under the action of inertia, so that the inertia block is clamped on the ratchet wheel ring in a locking cover to form a back lock, and the safety belts cannot be pulled out.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is:

after the safety belt is finished, the inertia block can continue to rotate under the action of inertia, so that the inertia block is clamped on a ratchet ring in the locking cover, and the safety belt cannot be pulled out.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides an anti-back-locking safety belt retractor, includes frame, spool and locking mechanism, the spool rotationally alternates in the frame, locking mechanism installs the one end at the spool, locking mechanism includes ratchet, lock plate and inertia piece, the ratchet is established the one end of spool relatively rotationally, the lock plate lid is established on the ratchet, the inertia piece rotationally installs in the ratchet, the inside fixed mounting of ratchet has the dog, the dog is close to the inner wall setting of ratchet, the one end of inertia piece is established and is close to the dog setting, the internal surface of lock plate is provided with the stand, the stand cover is established on the spool, the centre bore has been seted up on the stand, the stand passes through the centre bore with the spool links to each other with one heart, the cover is equipped with the jump ring on the stand, the jump ring is circular open structure, the opening end of the clamp spring is provided with an L-shaped abutting rod, the vertical end of the abutting rod is perpendicular to the inner surface of the locking plate, and the abutting rod is arranged between the inertia block and the stop block.

Further, the safety belt retractor further comprises a first end cover and a second end cover, the first end cover and the second end cover are respectively covered at two ends of the frame, and the locking mechanism is arranged in the first end cover.

Further, the ratchet is one end open-ended tubular structure, it rotates post, spacing post, stroke limiting post, rotation sleeve and spring holder to go back fixed mounting on the inner wall of ratchet, it establishes to rotate the cover sleeve on the spool, spring holder sets up the dog with rotate between the sleeve, be provided with the briquetting on the telescopic lateral wall of rotation, rotate the post with the adjacent setting of briquetting, the stroke limiting post sets up the side of spacing post, the outer wall of ratchet is equipped with tooth all around.

Furthermore, the inner surface of the locking plate is also provided with a ratchet ring, the ratchet ring and the upright post are fixed in the locking plate in a ring shape, the inner diameter of the ratchet ring is larger than the outer diameter of the upright post, the outer diameter of the ratchet ring is smaller than the inner diameter of the ratchet wheel, the ratchet ring and the side wall of the locking plate are respectively clamped and arranged on the inner side and the outer side of the ratchet wheel, and the inner wall of the ratchet ring is provided with braking teeth.

Furthermore, a plurality of clamping hooks are arranged on the side wall of the upright post, and the clamping spring is clamped in the clamping hooks.

Furthermore, a plurality of fixing plates are arranged on the periphery of the outer side wall of the locking plate, the fixing plates are evenly arranged along the circumferential direction of the locking plate, each fixing plate is provided with a pin, and the pins are inserted into the side wall of the frame.

Furthermore, the inertia block is a fan-shaped plate-shaped stretching body, a locking block is arranged at one end, far away from the stop block, of the inertia block, a reset single tooth is arranged on the curved surface of the inertia block, and the reset single tooth and the locking block can be abutted against the braking teeth on the inner side of the ratchet wheel ring after rotating.

Furthermore, the straight side face on the inertia block is adjacent to the rotating sleeve, a yielding groove is formed in the straight side face of the inertia block, and the pressing block is arranged in the yielding groove.

Furthermore, a rotating hole is formed in the end face of the inertia block along the stretching direction of the inertia block, and the rotating hole is sleeved on the rotating column in a clearance fit mode.

Furthermore, a spring bulge is fixedly installed on the inertia block, the spring bulge is arranged on the straight side face of the inertia block, the spring bulge corresponds to the spring base, and a buffer spring is arranged between the spring bulge and the spring base in a supporting manner.

The utility model has the advantages that:

the utility model discloses an anti-lock safety belt coiler, the ratchet is installed to the one end of spool, and the locking plate lid is established on the ratchet, and inertia piece is rotationally installed inside the ratchet, and fixed mounting has the dog on the inner wall of ratchet, and the internal surface of locking plate is provided with the stand, and the cover is equipped with the jump ring on the stand, and the open end of jump ring is equipped with supports the pole, supports and holds the pole setting between inertia piece and dog. When the safety belt is pulled out, the abutting rod at one end of the clamp spring can abut against the stop block, the reel and the ratchet wheel stop rotating suddenly after the safety belt is rewound, the inertia block can continue to rotate under the action of inertia, the abutting rod at the other end of the clamp spring can block one end of the inertia block, the clamp spring mounted on the stand column is extruded by the inertia block and the stop block to form a reaction force, and under the action of elasticity of the clamp spring, the locking block on the inertia block is separated from the braking teeth on the inner side of the ratchet wheel ring, so that the back locking of the safety belt retractor is effectively prevented.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of an anti-back-locking seat belt retractor according to the present invention;

fig. 2 is a schematic perspective view of the retractor shown in fig. 1 with the first cover omitted;

FIG. 3 is a perspective view of the retractor of FIG. 2 without the locking plate;

fig. 4 is a perspective view illustrating a locking plate of the retractor shown in fig. 2;

fig. 5 is a perspective view illustrating an inertia block in the retractor shown in fig. 3.

In the figure: 100. anti-back-locking safety belt retractor, 1, frame, 2, reel, 3, first end cover, 4, second end cover, 5, locking mechanism, 51, ratchet, 52, locking plate, 53, inertia block, 511, stop block, 512, rotation column, 513, spacing column, 514, stroke limiting column, 515, rotation sleeve, 516, spring base, 517, tooth, 518, buffer spring, 521, ratchet ring, 522, column, 523, snap spring, 524, fixed plate, 525, pin, 526, braking tooth, 527, trip, 531, locking block, 533, reset single tooth, 534, abdicating groove, 535, rotation hole, 536, spring bulge, 5151, pressing block, 5231, and support rod.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1 to 5, the utility model provides an anti-back-locking safety belt retractor 100 for winding the safety belt, safety belt retractor 100 includes frame 1, spool 2, first end cover 3, second end cover 4 and locking mechanism 5, and spool 2 rotationally alternates inside frame 1, and first end cover 3 and second end cover 4 are covered respectively and are established at the both ends of frame 1, and locking mechanism 5 installs the one end at spool 2 and locking mechanism 5 sets up the inside at first end cover 3.

The locking mechanism 5 comprises a ratchet wheel 51, a locking plate 52 and an inertia block 53, the ratchet wheel 51 is sleeved on one end of the reel 2 in a relatively rotatable manner, the opening of the ratchet wheel 51 is arranged in a direction away from the frame 1, the locking plate 52 covers the ratchet wheel 51, and the inertia block 53 is rotatably arranged inside the ratchet wheel 51.

Ratchet 51 is the open-ended tubular structure, fixed mounting has dog 511 on ratchet 51's the inner wall, rotates post 512, spacing post 513, limit for journey post 514, rotate sleeve 515 and spring base 516, dog 511 is close to ratchet 51's inner wall and sets up, spring base 516 sets up between dog 511 and rotation sleeve 515, it establishes on spool 2 to rotate sleeve 515, be provided with briquetting 5151 on the lateral wall on rotating sleeve 515, it sets up with briquetting 5151 to rotate post 512, limit for journey post 514 and spacing post 513 are adjacent to be set up, limit for journey post 514 sets up the side at spacing post 513, ratchet 51's outer wall is equipped with tooth 517 all around.

The inner surface of the locking plate 52 is provided with a ratchet ring 521 and a column 522, the ratchet ring 521 and the column 522 are annularly fixed inside the locking plate 52, the column 522 is sleeved on the reel 2, the column 522 is provided with a central hole, the column 522 is concentrically connected with the reel 2 through the central hole, the inner diameter of the ratchet ring 521 is larger than the outer diameter of the column 522, the outer diameter of the ratchet ring 521 is smaller than the inner diameter of the ratchet 51, the side walls of the ratchet ring 521 and the locking plate 52 are respectively clamped on the inner side and the outer side of the ratchet 51, the inner wall of the ratchet ring 521 is provided with a braking tooth 526, the column 522 is sleeved with a clamp spring 523, the clamp spring 523 is approximately in a circular opening structure, the open end of the clamp spring 523 is provided with an abutting rod 5231 in an L-shaped structure, the vertical end of the abutting rod 5231 is perpendicular to the inner surface of the locking plate. Be provided with a plurality of trips 527 on the lateral wall of stand 522, jump ring 523 card is established in trips 527, and in this embodiment, trips 527 has four. A plurality of fixing plates 524 are disposed around the outer side wall of the lock plate 52, the fixing plates 524 are uniformly arranged along the circumferential direction of the lock plate 52, each fixing plate 524 is provided with a pin 525, and the pin 525 is inserted into the side wall of the frame 1.

The inertia block 53 is rotatably sleeved on the rotating column 512, the inertia block 53 is a substantially fan-shaped plate-shaped stretching body, one end of the inertia block 53 is close to the stop block 511, one end of the inertia block 53, which is far away from the stop block 511, is provided with a locking block 531 in an extending manner, a curved surface of the inertia block 53 is provided with a reset single tooth 533, and the reset single tooth 533 and the locking block 531 can be abutted against a brake tooth 526 on the inner side of the ratchet ring 521 after rotating. The flat side of the inertia block 53 is adjacent to the rotating sleeve 515, and the flat side of the inertia block 53 is provided with an abdicating groove 534, and the abdicating groove 534 is arranged along the stretching direction of the inertia block 53. The sectional shape of the avoiding groove 534 is the same as that of the pressing block 5151, the pressing block 5151 is arranged in the avoiding groove 534, and the sectional dimension of the pressing block 5151 is larger than that of the avoiding groove 534. The end face of the inertia block 53 is provided with a rotation hole 535 along the stretching direction, and the rotation hole 535 is sleeved on the rotation column 512 in a clearance fit mode. The locking block 531 is a plate extending along the straight side of the inertia block 53, the outer end of the locking block 531 presents a sharp corner shape, and the locking block 531 is movably arranged between the limit column 513 and the limit column 514. The flat side of the inertia block 53 is fixedly installed with a spring protrusion 536, the spring protrusion 536 corresponds to the spring base 516, and a buffer spring 518 is supported between the spring protrusion 536 and the spring base 516.

When the safety belt is used, the safety belt is wound on the reel 2, the safety belt is controllably pulled out from the frame 1, in the process of pulling out the safety belt, the ratchet wheel 51 rotates along with the reel 2, under the combined action of a centrifugal force field when the ratchet wheel 51 rotates and elastic potential energy of the buffer spring 518, the inertia block 53 rotates around the rotating column 512, specifically, when the centrifugal force is larger than the elastic force of the buffer spring, the buffer spring 518 is extruded and then contracts, the locking block 531 moves from the limiting column 513 to the limiting column 514, the minimum distance between the locking block 531 and the ratchet ring 521 is reduced, the minimum distance between the reset single tooth 533 and the ratchet ring 521 is also reduced until the reset single tooth 533 and the locking block 531 rotate and then abut against the braking tooth 526, because the ratchet ring 521 is fixed on the frame 1 through the pin 525, the inertia block 53 is subjected to the counter-acting force of the braking tooth 526, and the inertia block 53 does not rotate around the rotating shaft 211 along with the ratchet wheel 51, the rotating column 512 in the inertia block 53 is fixedly connected with the ratchet wheel 51, the ratchet wheel 51 stops rotating under the limit of the inertia block 53, at the moment, the locking block 531 on the inertia block 53 is in contact with the abutting rod 5231 on the clamp spring 523, the clamp spring 523 mounted on the upright column 522 is extruded by the inertia block 53 and the stop block 511 to form a reaction force, the elastic force of the clamp spring 523 prevents the inertia block 53 from continuing rotating under the inertia effect, after the rotation process stops, the clamp spring 523 and the buffer spring 518 push the inertia block 53 to rotate reversely on the rotating column 512, and the locking block 531 is separated from the braking tooth 526, so that the safety belt is prevented from being locked reversely.

The utility model discloses an anti-locking safety belt retractor 100, ratchet 51 is installed to the one end of spool 2, and locking plate 52 lid is established on ratchet 51, and inertia piece 53 rotationally installs inside ratchet 51, and fixed mounting has dog 511 on ratchet 51's the inner wall, and locking plate 52's internal surface is provided with stand 522, and the cover is equipped with jump ring 523 on stand 522, and the open end of jump ring 523 is equipped with to holding pole 5231, supports to holding pole 5231 and sets up between inertia piece 53 and dog 511. When the safety belt is pulled out, the abutting rod 5231 at one end of the snap spring 523 abuts against the stop block 511, after the safety belt is rewound, the inertia block 53 continues to rotate under the action of inertia, the abutting rod 5231 at the other end of the snap spring 523 can block one end of the inertia block 53, the snap spring 523 is extruded by the inertia block 53 and the stop block 511 to form a reaction force, under the action of the elastic force of the snap spring 523, the inertia block 53 rotates reversely when the safety belt stops retracting, so that the locking block 531 on the inertia block 53 is separated from the braking teeth 526 on the inner side of the ratchet ring 521, and the back locking of the safety belt retractor 100 is effectively prevented.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an anti-back-locking safety belt coiler which comprises a frame, a reel and a locking mechanism, the reel rotatably alternates in the frame, locking mechanism installs the one end at the reel, locking mechanism includes ratchet, lock plate and inertia piece, the ratchet is established the one end of reel relatively rotatably ground cover, the lock plate lid is established on the ratchet, inertia piece rotatably installs in the ratchet, the inside fixed mounting of ratchet has the dog, the dog is close to the inner wall setting of ratchet, the one end of inertia piece is close to the dog setting, the internal surface of lock plate is provided with the stand, the centre bore has been seted up on the stand, the stand passes through the centre bore with the reel links to each other with one heart, the stand cover is established on the reel, the cover is equipped with the jump ring on the stand, the clamp spring is of a circular opening structure, an L-shaped abutting rod is arranged at the opening end of the clamp spring, the vertical end of the abutting rod is perpendicular to the inner surface of the lock plate, and the abutting rod is arranged between the inertia block and the stop block.

2. The anti-lock seatbelt retractor according to claim 1, further comprising a first cover and a second cover respectively covering both ends of the frame, wherein the locking mechanism is provided inside the first cover.

3. The anti-back-locking safety belt retractor according to claim 1, wherein the ratchet wheel is of a tubular structure with an opening at one end, a rotating column, a limiting column, a stroke limiting column, a rotating sleeve and a spring base are fixedly mounted on the inner wall of the ratchet wheel, the rotating sleeve is sleeved on the winding shaft, the spring base is arranged between the stop block and the rotating sleeve, a pressing block is arranged on the side wall of the rotating sleeve, the rotating column is adjacent to the pressing block, the stroke limiting column is arranged on the side edge of the limiting column, and teeth are arranged on the periphery of the outer wall of the ratchet wheel.

4. The anti-back-locking safety belt retractor according to claim 1, wherein a ratchet ring is further disposed on an inner surface of the locking plate, the ratchet ring and the column are annularly fixed inside the locking plate, an inner diameter of the ratchet ring is larger than an outer diameter of the column, the outer diameter of the ratchet ring is smaller than the inner diameter of the ratchet wheel, side walls of the ratchet ring and the locking plate are respectively clamped and disposed on inner and outer sides of the ratchet wheel, and braking teeth are disposed on an inner wall of the ratchet ring.

5. The anti-lock safety belt retractor according to claim 1, wherein a plurality of hooks are provided on a side wall of the pillar, and the snap spring is snapped in the hooks.

6. An anti-lock safety belt retractor according to claim 1, wherein a plurality of fixing plates are provided around an outer side wall of the lock plate, the fixing plates are arranged uniformly in a circumferential direction of the lock plate, and each fixing plate is provided with a pin which is inserted into a side wall of the frame.

7. The anti-back-locking safety belt retractor according to claim 4, wherein the inertia block is a fan-shaped plate-shaped stretching body, one end of the inertia block, which is far away from the stop block, is provided with a locking block, a curved surface of the inertia block is provided with a reset single tooth, and the reset single tooth and the locking block can be abutted against the braking tooth on the inner side of the ratchet ring after rotating.

8. The anti-back-locking safety belt retractor according to claim 3, wherein the straight side surface of the inertia block is adjacent to the rotating sleeve, the straight side surface of the inertia block is provided with a yielding groove, and the pressing block is arranged in the yielding groove.

9. The anti-lock safety belt retractor according to claim 3, wherein a rotation hole is formed in an end surface of the inertia block along a stretching direction of the inertia block, and the rotation hole is sleeved on the rotation column in a clearance fit manner.

10. The anti-lock safety belt retractor according to claim 3, wherein a spring protrusion is fixedly mounted on the inertia block, the spring protrusion is arranged on the straight side surface of the inertia block, the spring protrusion corresponds to the spring base, and a buffer spring is arranged between the spring protrusion and the spring base in an abutting manner.