SU1426445A3 - Emergency-locking pulling-in device for vehicle safety belt - Google Patents

Abstract

The invention relates to the means of passive safety of vehicles and concerns the design of an emergency lock-up device for the measurement of vehicle safety. The purpose of the invention is to increase the sensitivity of the device. The device contains a U-shaped framework, the box shelves of which are identical elements. Each of the frame elements 3 is made with a round hole having a toothed segment 5. A coil with a central shaft is mounted in the frame, two toothed disks 8 with locking teeth for engagement

Description

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with toothed segments 5 and two protruding studs. A cassette with a locking mechanism is closed by an end plate 29. There is also a second cassette with a retracting spring, the end element of which is made with an elongated groove 31 and is equipped with a sliding bearing. The latter is made in one piece with a spring-loaded control element 36, on which a pawl 38 is hinged and mounted with the ability to move into engagement with the teeth of the ratchet wheel attached to the coil, under the influence of an inertial sensing mechanism 39 of the ball type in the bowl located in the lower part of the end plate 29. The control element 36 is also made with an elongated groove 40 for engagement with the protrusion 41 on the locking dog 42, pivotally mounted on the axis

43. The mechanism 39 comprises a holder 45 with a bowl for the ball 46, carrying on the protruding shoulder the following lever 47, which is acted upon by the ball 46. This lever interacts with the pawl 38 mounted on the axis 48, and there is an abutment against the back side of its tooth 49 for contact with her in the locked position. When the horizontal level is accelerated by the threshold level, the slit 46 is displaced to the edge of the thicket, raising lever 47. At this time, the pawl 38 engages with the ratchet wheel, the angular movement of which is clockwise transmitted by the pawl 38 to the control element 36, the movement of which triggers the pivoting of the pawl 42 with the toothed disk 8 of the coil, it stops its rotation around the trunnions. 7 3.p. f-ly, 1 ill.

The invention relates to the means of passive safety of vehicles and relates to the construction of an emergency locking device for a vehicle safety belt.

The purpose of the invention is to increase the sensitivity of the device.

H FIG. 1 shows the proposed device in a disassembled form with an emergency lock, the first option; in fig. 2 - inertial sensing element in the position of uncoupling, axonometric; in fig. 3 is the same in the pre-lock position in FIG. 4 is the same in the full lock position before coupling the main locking mechanism; FIG. 5 - the same, in the full lock position; in fig. 6.- schematic view of the locking mechanism; in fig. 7 - the proposed device, the second option; in fig. 8 - sensitive element in the full blocking position in FIG. 9 - the same, option; in fig. 10 is part of the locking mechanism, the second option {in FIG. 11 - some ele

cops blocking mechanism, end view, option.

The emergency locking retraction device contains a U-shaped frame 1, the supporting part of which is made with an opening 2 for fastening the frame to the car body. The side shelves of the U-shaped cage are the same elements 3 and 4, each of which is made with a round hole having respectively a toothed segment 5 constituting part of its upper portion. Bottom sections of circular holes are enlarged by processing them at a right angle to accommodate the elements of the locking mechanism.

In the frame 1, a coil 6 is mounted, comprising a central shaft 7 for wounding a belt, two toothed disks 8 and 9 with locking teeth for engagement with. jagged segments 5 on the elements 3 and 4 of the frame and two protruding pins 10 and 11.

To provide the required distance between the elements 3 and 4 of the frame there is a spacer 12 with protruding

in the perpendicular direction by the side tabs 13 and 14, the passage of the shaft between the notches 15 and 16 in the outer edges of the elements 3 and 4 of the frame. Lucky 13 and 14 protrude beyond the edges of the holes in these elements and, entering the toothed disks 8 and 9 of the coil, prevent their axial movement. In addition, the spacer 12 is provided at both ends with hooks 17 and 18 for holding the cassette 19 with a pull-in spring in engagement with the outer side surface of the frame member 4, and the cassette 20 with the locking mechanism in engagement with the outer side surface of the frame member 3.

The cassette shell 19 contains an end member 21 adjacent to the frame member 4 and coupled with it a cover 22 carrying a stopper (not shown) to which the outer end of the retraction spring 23 is attached by means of a hook 17. The inner end of the spring 23 is attached to the plastic sleeve 24, having a cylindrical outer surface and a slot opening for engaging with the coaxial end of the trunnion 11 of the coil 6.

In order for one end of sleeve 24 to be of sufficient length to be inserted into a hole in a plastic support plate 25 mounted slidably in a longitudinal recess 26 filled in the surface of the end member 21, the axial length of sleeve 24 is made larger than spring 23. In the center of the recess 26 there is an elongated a groove 27 through which the trunnion 11 and the boss on the support plate 25 pass. The length of the recess 26 and the groove 27 allows the support plate 25 to slide between the position where the tooth on the disk 9 is in the hook enii with a toothed segment at the element frame 4, and a position in which they are disengaged. To release the support plate 25 to the uncoupling position, a spring 28 is used - planted on the protrusion of the support plate.

The cassette 20 with the locking mechanism is closed by the end plate 29 adjacent to the outer surface of the frame member 3 together with the cap 30, which engages with the hook 18 on the strut 12. Like the corresponding details of the cassette 19 with the retracting spring, the end element 21 is made with an elongated groove 31 and provided with a sliding bearing 32, pressed by the spring 33 in the direction from the toothed segment

5 on the element 3 of the frame. However, in the cassette 20, the sleeve 24 is replaced with a pin 34, which is rigidly attached to the ratchet wheel 35 and has a cylindrical outer surface for

contact, in the bearing 32 and the groove for engagement with the end of the trunnion 10 of the coil 6, performed with the flips.

The sliding bearing 32 is made in one piece with the control element 36, which is under the influence of the elongated end 37 of the spring 33, as a result of which it receives an angular displacement in the direction of retraction of the belt. On control 36

The pawl 38 is hinged and mounted for movement in engagement with the teeth of the ratchet wheel 35 under the influence of the inertia sensing mechanism 39

The type of ball in a bowl mounted in the lower part of the end plate 29. The control element 36 is also secured with an elongated groove 40 for engagement with the protrusion 41 on the locking pawl 42, which is pivotally mounted on an axis 43 fixed to the side of the frame 3 that faces the frame 3. end plate 29. Last done with oblong

hole 44, through which passes, the protrusion 41.

The inertia sensing mechanism 39 (Figs. 2-5) comprises a holder 45 with a bowl for ball 46, attached to an end plate 29 and carrying on a protruding shoulder a hinged follower lever 47 on which the ball acts. This lever 47 is in cooperation with the dog 38. The direction of rotation when winding the seat belt around the coil is counterclockwise. The dog 38 is mounted on the axis 48, and opposite the back side of its tooth there is an abutment 49 for contacting the knuckles from its locking position.

The cassette 20 with the locking mechanism (Fig. 1) also contains a traditional type of drive mechanism,

striking, belt. The locking mechanism comprises an inertial disk 50 mounted rotatably on the axle 34 of the ratchet wheel 35, and a pawl 51 pivotally mounted on an axis 52 mounted on the side surface of the ratchet wheel 35 close to its periphery.

The inertia disk 50 is provided with a finger 53 which fits into a groove in the pawl 51 to move it out. In the collar 30 of the cassette 20 (} the spring 54 is placed.

An internal ratchet teeth 55 are formed on the annular protrusion of the ypravl element.

To prevent the pawl 38 from moving in the direction of the teeth of the ratchet wheel 35, a holding lever 56 (Fig. 8 and 9) is provided, one end 57 of which is located at a right angle to the body of this lever and enters with an tension into the axial hole in the outer end of the ratchet pin 34. wheels 35. The other end of the lever 56 is made with a pointed protrusion 58 arranged to fit into the corresponding cutout 59 in the back of the pawl 38. The upper edge 60 of the notch 59 is inclined toward the radial direction relative to the axis 48 of the pawl 38.

According to the embodiment (Figs. -7), the control element 36 is pivotally mounted on the end plate 29 by means of an axis 61 entering the hole. 62. Axis 61 is located at the top of an isosceles triangle, in which (Fig. 8 and 9) the base is the longitudinal axis of the groove 31.

The tooth of the ratchet wheel 35 (Fig. 10 is provided on an annular protrusion 63, inside which an annular protrusion of the control element 36 carrying the ratchet teeth 55 and the pawl 51 are placed. With this design, the width of both groups of ratchet teeth can be significantly increased without a corresponding increase in the total axial lengths of the pulling device. However, if the pawl 51 is misaligned on its axle x 52 and 53, the top of its tooth could intersect with the top of one of the ratchet teeth 55.In engagement with the teeth of the MI 55, always enter first closest to the coil to

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not the top of the tooth. Similarly, also made the top of the tooth of another dog 38.

To reduce the load on dog 51, section 65 (Fig. 10), which runs approximately at an angle of 60 on each side of axis 61, eliminated ratchet teeth 55 and installed a second dog 66 on an axis diametrically opposite to axis 52. Dog 66 is associated with inertial displacement 50 by means of a finger 67, similar to a finger 53.

To increase the relative movement between the ratchet wheel 35 and the inertial disk 50, the tips of the teeth of both dogs are angled to the line connecting the pivot points of the elements 52, 53 and 67, 68, respectively. In addition, both dogs are provided with lugs 69 and 70, respectively, similar to the stop for dog 38.

The device p-works as follows.

In the embodiment of FIGS. 2-5, when the horizontal acceleration value communicated to the retractor is below the threshold level at which the locking mechanism needs to be actuated, the ball 46 remains in the center of the bowl and the pawl 38 (FIG. 2) is not engaged with the ratchet wheel 35.

When the specified threshold level of acceleration is exceeded, the ball 46 (FIG. 3) is displaced to the edge of the bowl, raising the lever 47, as a result of which the pawl 38 engages with the ratchet wheel 35. Because it is attached to the coil 6 and, therefore, dismounting the belt from the coil causes the angular movement of the ratchet wheel 35 in the clockwise direction (Fig. 2-5), this angular movement is transmitted by the dog 38 to the control element 36.

As a result of this movement of the latter (Fig. 4), the locking pawl 42 is rotated into engagement with the toothed disk 8 of the coil 6, stopping the coil rotation around its trunnions 10 and 11. As the belt continues to be tensioned, the coil 6 rotates at the top of the tooth of the locking pawl 42, bearing 32 and the flat-uin 25, breaking the force of the springs 28 and 33 (Fig. 1), slides along the slots

27 and 31 until the teeth of the disks 8 and 9 engage with the toothed segments 5 on the frame elements 3 and 4 (FIG. 5). At the beginning of the angular interchange of the control element 36 clockwise, it moves to the full lock position and maintains this position

until the seat belt tightens, even when the ball 46 returns to the center position in the bowl.

When a load is applied during locking on the dog 38, its axis 48 is unloaded due to the presence of the stop 49 in the form of a protrusion on the control element 36 (FIG. 1), behind the tooth tip of the dog 38. When this dog is moved to the lock position, the back side its tooth is in contact with the stop 49. To ensure such contact, the pawl 38 is mounted on the axis 48 with a large gap.

The inertial disk 50 has a finger 5 entering the groove of the pawl 51 to move it outward in the event that the inertial disk 50, having overcome the force of the spring 54, will lag behind the ratchet wheel 35 when the belt is removed from the reel 6. When the belt is accelerated, the belt falls; the disk 50, due to its sufficient inertia, overcomes the force of the spring 54, as a result of which the pawl 51 moves outwards and engages with the internal ratchet teeth 558filled on the protrusion of the control element 36, as a result of which it engages with the ratchet wheel 35. The further winding of the belt then causes an angular movement of the control element 36, which leads to the blocking of the mechanism (Fig. 4 and 5).

When the belt is released from the coil 6, the ratchet wheel 35 moves the retaining lever 56 clockwise until its outer end stops against the inner surface of the end plate 29 of the collar 30. After this, if the ratchet wheel 35 continues to rotate, the end 57 of the lever slips into the hole provided for it. The dog 38 can then move freely to the engaged position.

When the seatbelt is mounted on the coil 6, the ratchet wheel rotates counterclockwise and turns lever 56 until the protrusion 58 enters the notch 59, after which the lever keeps the pawl 38 in the uncoupling position. However, the upper surface 60 of the notch 59 is made at such an angle to the radial direction from the axis 48 of the pawl 38 that, when the horizontal acceleration acting on the ball 46 exceeds a predetermined threshold value, the friction clutch of the end 57 of the lever in the specified hole is overcome and the lever 56 moves removes the protrusion 58 from the notch 59. As a result, the dog 38 moves into engagement with the snoring wheel 35. Therefore, as soon as the ball 46 perceives excessive horizontal acceleration, the mechanism will begin to lock, even if the body The safety belt driver did not start moving and winding the belt from the reel 6.

The operation of the locking mechanism of FIG. 7 is iodine to its operation in FIG. 1 that either the inertia sensing mechanism 39 or the inertial disk 50 may cause the ratchet wheel 35 to collapse with the control element 36. However, instead of allowing the latter to have limited angular movement around the trunnion 10, in this case the control element is pivotally mounted on the face the plate 29 through the axis 6 entering the hole 62. When, after coupling the control element 36 with the ratchet wheel 35, the latter continues the angular movement in the direction of unwinding the belt, the element 36 of the turn ivaets about axis 61, moving the pin 10 along the slot 31, whereby the toothed wheels 8 and 9 are input into engagement with toothed segmentani 5. The pawl 42 (FIG. 1) is thus not necessary. Consequently, the hole 44 of the face plate 29 is not necessary, as a result of which it becomes easier to seal the cassette from contaminants that could put the mechanism into operation.

When the locking mechanism is actuated, when one of the dogs 51 and 66 is further than 120 from the axis 61, one dog takes the load and the other is in section 65. If the lock starts when both dogs are closer than 120 from | esi 61, then the load is distributed between these dogs.

(claims

Claims (8)

1. Emergency locking device dd1 vehicle safety belt retracting, containing two frame members parallel to each other, a coil with a shaft for wounding a belt and each disk at the end of the shaft with a uniform disc distributed along its periphery the coil is mounted on the frame elements in bearings mounted with the possibility of limited movement of the pci coil relative to the frame elements in the direction perpendicular to the axis of rotation between the clutches of the clutch and the clutch, in the latter of which the locking teeth are engaged with the the teeth on the said elements of the framework to prevent the rotation of the coil, the elastic means for mixing; The coil is disengaged and the driving means for moving the coil to the engagement position, characterized by 14TOj in order to increase sensitivity, it is equipped with a ratchet wheel mounted on the coil with the possibility of joint rotation with it, with the latch installed rotation of the coil on the shaft, an inertial sensitive means for moving the latch and ensuring its interaction with the ratchet wheel together with a control element that is rotatably mounted around an axis, parallel to the shaft of the coil, for engagement with one of said discs, and fastening means for connecting the control member to the coil. 2. The device according to claim 1, about tl and - the fact that the fastening means includes a lever mounted on the frame elements and connected to the control element by means of a roller interacting with cam surface. 3. The device according to claim 1, about tl and - the fact that the axis of the control element is displaced relative to the axis of the coil in a direction perpendicular to the direction of movement 0 5 0 Q s WITH five the carcass to the locking position, and the coil is rotatably mounted in the control element. 4. The device according to claim 1, characterized in that the inertia sensitive means includes an inertial disk mounted rotatably around the axis of the coil and connected to the ratchet wheel by means of a spring, and at the extreme — two dogs mounted symmetrically with respect to the axis of the coil between the ratchet wheel and the inertial disk with the possibility of radial movement for engagement with internal ratchet teeth made on the ring the protrusion of the control element. 5. The device according to claim 4, characterized in that it is provided with a dog mounted on an axis on a sensitive element, on which an emphasis is placed for contact with the bearing surface of this dog, when interacting with the ratchet wheel, 6. The device according to paragraphs. 1-5, about t - in that it is provided with a holding means of a pawl mounted on the axis of the sensing element when the coil is rotated in the direction of the retraction of the belt and means for counteracting the holding means to exceed the horizontal acceleration facilities. 7. The device according to claims 1-6, which is based on the fact that the drive means are included in a assembled first cassette attached to the outside of one of the frame members, and another cassette attached to another cassette in which a pull-in spring is placed, each of the cassettes equipped with slide bearings for a coil having surfaces in contact with a radially disposed part of the shell corresponding cassette. 8. The device according to PP, 1-7, t -; 1 that the sensing element is equipped with a bearing for the sleeve, which is complete with the ratchet wheel for its connection with the shaft of the coil. . J H8 five at 2 55 Fie.2 Yu 15 33 "five J5 56 (4-i F1 / g. 6 W-4 W FIG. eight M “56; ff SI Editor A. Shandor Compiled by L. Smolska Tehred M. Khodanych 426445 11 Proofreader L. Pilipenko