SU1299493A3 - Emergency-locking pull-in device for vehicle safety belt - Google Patents

Abstract

This invention relates to emergency locking retractors for vehicle safety belts. The goal is to reduce the labor intensity of manufacturing. Deviceso cm

Description

The structure contains two frame elements 3 parallel to each other, a coil with a shaft for winding a belt, on the ends of which disks 8 with locking teeth are mounted for engagement with the corresponding teeth of the frame elements, elastic and driving means for displacing the coil respectively in position uncoupling and locking, locking mechanism, inertial mechanism 37 with holder 43 and ball 44. Holder 43 is provided on the projecting part with a driven lever

one

The invention relates to passive safety means, namely to an emergency locking retractor device for a vehicle safety belt.

The purpose of the invention is to reduce the labor intensity of manufacture.

Figure 1 shows an emergency locking retractor, general view; 2 shows the inertial mechanism in the tripping position; fig.Z - the same in the pre-blocking position; figure 4 - the same in the full lock position before coupling the main locking mechanism; figure 5 - the same, in block-position; Fig. 6 is a side view of one of the frame elements and the corresponding locking disk, a side view showing the mutual angular position of the teeth when the mechanism is in the disengaged position; 7 is the same in the position of the partial coupling; Fig. 8 shows a solid coil, a longitudinal section; figure 9 - section aa on Fig; Fig. 10 shows a chain roller embodiment; Fig. 1 is a carcass, an embodiment; 12, the same, another variant; Fig, 13 - end of the coil for the frame shown in Fig, 12, side view; on Fig - element of the frame and the corresponding disk of the coil, reducing ianos teeth, side view.

The swiveling device has a U-about different frame 1, the supporting part of which

45 being under the influence of the ball and in contact with the dog 36. When the threshold level of acceleration is exceeded, the ball 44 raises the lever 45, the dog 36 engages the ratchet wheel 33 connected to the coil and transmits the angular movement to the control element 34. The last It transmits this movement to the locking dog 40, which engages in engagement with the toothed disk 8 of the roller, blocking its angular movement. 8 hp f-ly, 14 ill.

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It is made with a hole 2, through which the frame 1 can be attached to the car body. The side shelves of the U-shaped frame comprise the same elements 3 and 4 of the frame, each of which contains a circular opening having a corresponding toothed segment 5 constituting part of its upper periphery. The lower parts of the circular holes are enlarged by b processing under the right angle to accommodate the parts of the mechanism.

In the frame 1, a coil 6 is installed, comprising a central shaft 7 on which a safety belt can be wound, two toothed disks 8 and 9 for coupling to the toothed segments 5 respectively on elements 3 and 4: the frame and two projecting pins 10

and 11. I

In order to provide the required distance between the elements 3 and 4 of the frame, a spacer 12 is provided, with lateral tabs 13 and 14 protruding in the perpendicular direction and extending between the legs, with the cut-out hooks 15 and 16 in the outer edges of the frame elements 3 and 4. The end tabs 13 and 14 protrude beyond the edges of the holes in the elements 3 and 4 of the frame and, entering the toothed disks 8 and 9 of the coil, prevent infrared movement. In addition, the spacer 12 has, at both ends, corresponding hooks 15 and 16, which serve to hold the cassette 17 with the retracting spring in engagement with the outer side surface of the frame element 1299493 and 4 and the cassette 18 with the locking mechanism in engagement with the outer surface of the element 3 carts.

for but in the unit that on by di no us 5 in 34 to 39 in on to that type of article

The cassette shell 17 contains an end member 19 adjacent to the frame member 4 and engaged therewith with a lid 20 carrying a stopper (not shown) to which the outer end of the retraction spring 21 is attached by means of a hook 15. The inner end of the spring 21 is attached to the plastic a sleeve 22 having a cylindrical outer surface and a slot opening for engaging with the flip side of the end 11 of the coil 6. For one end of the sleeve 2 to be long enough for insertion into the hole in the plastic support plate 23, constant slidably in the elongated recess in the surface of the end plate 19, the axial length of the sleeve 22 is made larger than the width of spring

 21. In the center of the recess 24, an elongated groove 25 is made, through which the pin 11 and bobushka on the support plate 23 are located.

. 23 between the position in which the disc 9 is in engagement with the toothed segment 5 on the frame member 4 and the position in which they are out of such engagement. To release the support plate, the release position is provided by a spring 26.

The cassette 18 with the locking mechanism MOM is closed by an end plate 27 adjacent to the outer surface of the frame member 3 and together with a cap 28 coupled to it by means of a hook 16 on the spacer 12. Like the corresponding component parts of the cassette 17 with a spring retracted, an end plate 27 has an elongated groove 29 and a sliding bearing 30, pressed by the spring 31 in the direction From the toothed segment 5 on the frame member 3. However, in the cassette 18, the sleeve 22 is replaced with a pin 32, which is

When the threshold level of acceleration is exceeded, the ball 44 (FIG. 3) is shifted

Visionally attached to the ratchet wheel 33 and has a cylindrical outer closer to the edge of the bowl, lift the lever 45, the surface for contact in the bearing-resulting dog 36 enters ke 30 and a groove for engaging with a full-clutch ratchet wheel 33. Poached with bald heads the end of the pin 10 ka-. The ring of the ratchet wheel 33 is fastened to the carcass 6. with the coil 6 and, therefore, the ri

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The sliding bearing 30 is made in one piece with the control element 34 subjected to the action of the elongated leg 35 of the spring 31, as a result of which it receives an angular displacement in the direction of retraction of the belt. A pawl 36 is hinged on the control element 34, thus having the ability to move to the engagement position with the teeth of the ratchet wheel 33 under the influence of the traditional inertial sensing mechanism 37 of the ball type in the bowl mounted on the bottom of the face plate 27. The control element 34 also has an elongated groove 38 which is in engagement with the protrusion 39 on the locking bar 40, which in turn is pivotally mounted on an axis 41 fixed to the lateral side facing the element 3 of the frame howl plate 27. The end plate 27 has an oblong hole 42 through which the projection 39.

Figure 2-5 shows a schematic blocking mechanism, with some of the parts shown on them broken off or modified as compared with figure 1, while others are excluded so that the mechanism works. The inertia sensing mechanism 37 contains a holder 43 having a bowl for the ball 44. The holder 43 is attached to the end plate 27, and on its protruding portion there is an articulated (following) lever 45 on which the ball acts. The driven lever 45 is in contact with the pawl 36. The direction of rotation when winding the seat belt around the coil is counterclockwise.

I

The locking mechanism works as follows.

When the horizontal acceleration imparted to the diverter is below the threshold level at which the blocking mechanism needs to be applied, the ball 44 remains in the center of the bowl and the pawl 36 (FIG. 2) is not engaged with the ratchet wheel 33.

When the threshold level of acceleration is exceeded, the ball 44 (FIG. 3) is shifted

closer to the edge of the bowl, raise the lever 45, resulting in the dog 36 engages with the ratchet wheel 33. As the ratchet wheel 33 is attached to the coil 6 and, therefore, station 48, overcoming the action of the spring 52, lags behind the ratchet wheel 33 belt from the coil 6. When accelerating the movement of the belt in the direction of 5 research institutes of compression, the disk 48, having sufficient inertia, overcomes the action of the spring 52, as a result of which the pawl 49 moves outward and engages

The belt from the coil 6 causes the angular movement of the ratchet wheel 33 in the clockwise direction (FIGS. 2-5), then the angular movement is transmitted by the pawl 36 to the control element 34. Such an angular movement (FIG. 4) of the control element 34 is transmitted through the protrusion 39, located in the groove 38, onto the blocking pawl 40, which is hereby 10 internal ratchet teeth 53, is turned on the axis 41 into engagement made on the annular protrusion with the toothed disk 8 of the coil 6, the control element 34, due to the runes angular moved The last thing that happens is the clutch of the control unit around the pivots 10 and 11. In the case of the extension element 34 with the ratchet tension tensioning wheel, the coil 6 is turning 15 33. Further tightening of the belt grows at the top of the tooth then locks the angular Moving the compacting pawl 40 r bearings 23 and 30, equalizing element 34, which results in overcoming the action of springs 26 and 31 (FIG. 1), slides along slots 25 and 29 until the teeth of the disks 8 and 9 enter 20 with toothed segments 5 on the elements 3 and 4 of the frame (figure 5). One has only to start the angular displacement of the control disk 34 in a clockwise direction, as a full decoupling position, and the radial movement moves to the half-and-outside position between the teeth on a circle with a radius R 2 equal to the maximum radius R 3 8, with

to lock the mechanism.

The radially internal tops of the teeth of the segments 5 on the frame element 3 (Figures 6 and 7) lie on a circle of radius R 1 centered on the axis 53 of the coil 6 when it is fully locked and then remains in this position until The tension of the seat belt will not cease even if the ball 44 returns 30 "and 6 when it is moved to the center 54, which coincides with the full clutch coil axis. In addition, the locking surfaces 55, located on the left side of the plane BSt (Figs. 6 and 7) of the teeth of the segments 5, are located at the same angle oi to the corresponding radii of this second circle in the adjacent cavities between the teeth. On the other hand, the locking surfaces of the 56-58 teeth on the right side of the plane & S are parallel to it. Thus, all locking surfaces 55 are parallel to the respective locking surfaces in a central position in the bowl.

When acting during the blocking of the load on the dog 36, its axis 46 is unloaded due to the presence of the stop 47, made in the form of a protrusion on the control element 34 (FIG. 1) behind the tooth tip of the dog 36. When the dog 36 is moved to the locked position (FIG. .4), the back side of its tooth is in contact with the stop 47. 40 To facilitate the creation of such a contact, the dog 36 is seated on the axis 46 with a large gap.

full engagement. In addition, the locking surfaces 55, located on the left side of the plane BSt (Figs. 6 and 7) of the teeth of the segments 5, are located at the same angle oi to the corresponding radii of this second circle in the adjacent cavities between the teeth. On the other hand, the locking surfaces of the 56-58 teeth on the right side of the plane & S are parallel to it. Thus, all the locking surfaces 55 are parallel to the corresponding locking surfaces 59 on the gear disk 8.

Cassette 18 with locking mechanism. Since the angle p between the plane

The aP and the radial line running from the center 54 to the tooth surface 56 are equal to the angle about, this surface 56 is also parallel to the corresponding blocking surface 59. As a result, when the coil 6 is moved to the locked position, everything is blocked (figure 1) mechanism, sensitive to the pulling of the belt. This locking mechanism consists of an inertial disk 48 mounted jn rotatably on the trunnion 32 of the ratchet wheel 33 and the pawl 49 hingedly mounted on the axis 50, fixed on the lateral surface, the edge surfaces 55 and 56 come into contact with the entire surface 33 close to its permissive blocking surface spheres. The inertial disk 48 has a finger 51 which fits into a groove in the pawl 49 to move it outward in the event that

m PL 59 on the gear disk 8. In this case, the surfaces 57 and 58 immediately come into contact with the tops 60 of the corresponding teeth on the gear disk and at

the disk 48, having overcome the action of the spring 52, will lag behind the ratchet wheel 33 when the belt is pulled from the coil 6. When the belt accelerates in the direction of the compression, the disk 48, having sufficient inertia, overcomes the action of the spring 52, as a result of which the dog 49 moves to outward direction and engages with

internal ratchet teeth 53, made on the annular protrusion of the control element 34, resulting in the coupling of the control element 34 to the ratchet wheel 33. Further tightening of the belt then causes an angular displacement of the control element 34, which causes complete uncoupling, and the radial-outer depressions between the teeth are internal ratchet teeth 53, which are made on the annular protrusion of the control element 34, as a result of which the control element 34 engages with the ratchet wheel 33. Further The tightening of the belt then causes an angular movement of the control element 34, which leads to the complete uncoupling, and the radial-external cavities between the teeth to block the mechanism.

The radially internal tops of the teeth of the segments 5 on the frame element 3 (FIGS. 6 and 7) lie on a circle of radius R 1 centered on the axis 53 of the coil 6 when it is in polo and 6 when it is moved to posocenter 54 coinciding with the axis coil and 6 when it is moved to full engagement. In addition, the locking surfaces 55, located on the left side of the plane BSt (Figs. 6 and 7) of the teeth of the segments 5, are located at the same angle oi to the corresponding radii of this second circle in the adjacent cavities between the teeth. On the other hand, the locking surfaces of the 56-58 teeth on the right side of the plane & S are parallel to it. Thus, all the locking surfaces 55 are parallel to the corresponding locking surfaces 55 and 56 come into contact with the entire surface 59.5 on the gear disk 8. The surfaces 57 and 58 immediately come into contact with the tops 60 of the corresponding teeth on the gear disk and at

moving the coil 6 to the full engagement position of these vertices 60. slides along surfaces 57 and 58. A similar result occurs for disk 9 on the other side of coil 6. Thus, the load on each individual tooth is reduced and therefore both disks 8 and 9 and elements 3 and 4 of the frame can be made of more lighter material than it used to be before.

One consequence of the acceptability of manufacturing the locking discs 8 and 9 from relatively soft material is the ability to make the entire coil as a solid casting obtained under pressure (Figures 8 and 9). Shaft 7 comprises hollow cylinder 61,

An alternative embodiment of the frame 1 shown in Fig. 1 is the carc 78, shown in Fig. 11. The frame 78 also has a U-shape with a side which has a toothed segment 81, similar to the toothed segments 5 shown in FIG. However, the bottom of each side element 79 and 80

having two diametrically opposite radial ribs 62 and 63, co-20 "new elements 79 and 80, each of the sofa with transverse ribs 64 and 65, which limit the central groove passing diametrically through the entire shaft 7 and intended for receiving the inner end safety belt-25 frame removed. Instead, the outer

nosti. One end of the groove has an expanded portion 66 of a rectangular cross section for receiving a locking insert of a T-shaped cross section (not shown) passed through a loop formed at the 30 end of the belt. One for each, the Stoonex of each of the toothed segments 81 is connected to the base of the frame 78 by means of a corresponding offset reinforcement part 82, which carries a pair of downwardly extending parallel projections 83 and 84, forming a slot open from one end to accommodate the coils 10 and 11. When the coil 6 is in place, the displaced reinforcement parts 82, interacting with the outer end surfaces of the toothed disks 8 and 9, prevent the coil 6 from axially moving. The trunnions 10 and 11 are prevented from the grooves between the projections 83 and 84 from the grooves between the projections 83 and 84. 25 of two cassettes 17 and 18. As these support plates prevent the coil from touching the bottom edges of the holes in the side elements 3 and 4

The central groove has two central semi-circular ribs 67 (Fig. 8) connecting the cylinder 61 and the ribs 62-64 to each other.

Corresponding disc-shaped parts 8 and 9 are formed on each side of the shaft 7, each of the disc-shaped parts 8 and 9 has a circular recess 68 with holes communicating with the internal cavities in the cylindrical part 7. A tooth 69 is formed on the periphery of the disc-shaped parts 8 and 9 (Fig. .9), having a symmetrical trapezoidal shape, as a result of which the coil 6 can be inserted into the frame 1 and rotated in any direction, which simplifies assembly. Outwardly protruding beyond the teeth of the teeth 69 of the shoulder 70 are provided to prevent axial movement of the coil 6 relative to the frame members when the coil 6 is in the locked position.

The coil can be made of extruded material (figure 10). Gears are made in the form of ring elements 71 and 72, equipped with f5 94938

on the outer periphery of the teeth for engagement with the toothed segments 5 on the frame and on the inner periphery of the teeth for engagement with the grooves formed on the extruded cylindrical shaft 73, having a groove 74 extending along its entire length from the periphery to the center and intended for placing the rod 75, having a narrower groove 76, through which the belt is passed, with pins 10 and 11 formed at the ends of the rod 75. The belt leaves the shaft 73 through a narrow groove 77 opposite to the groove 74.

JO

An alternative embodiment of the frame 1 shown in Figure 1 is the frame 78 shown in Figure 11. Frame 78 also has a U-shape with bo elements of 79 and 80, each of the frame is removed. Instead, the outer

which has a toothed segment 81, similar to the toothed segments 5 shown in FIG. However, the bottom of each side element 79 and 80

“With new elements 79 and 80, each frame is removed. Instead, the outer

“With new elements 79 and 80, each frame is removed. Instead, the outer

The end of each of the toothed segments 81 is connected to the base of the frame 78 by means of a corresponding offset reinforcement part 82, carrying a pair of downwardly extending parallel projections 83 and 84, forming a recess open at one end for accommodating the reel journals 10 and 11. When the coil 6 is in place, the displaced reinforcement parts 82, interacting with the outer end surfaces of the toothed disks 8 and 9, prevent the coil 6 from axially moving. The trunnions 10 and 11 are prevented from the grooves between the projections 83 and 84 from the grooves between the projections 83 and 84. 25 of two cassettes 17 and 18. As these support plates prevent the coil from touching the bottom edges of the holes in the side elements 3 and 4

frame 1 (Fig. 1), retracting such lower edges does not affect the operation of the mechanism.

Figures 12 and 13 show a frame that prevents axial movement of the coil. The frame 85 (Fig. 12) is similar to the frame 1 (Fig. 1), except that the circular hole 86 in the side elements of the frame, whose center is located on the axis 87 of the rotation of the coil,

when she is disengaged

It is enlarged by a second round clock with a larger radius centered at 88. The coil 6 is replaced by a coil 9, the gear disks 90 of which are fitted with flanges 91 projecting radially outward beyond their teeth by a larger amount than the flange 70 on the coil 6. The diameter of parts of each of the holes of the frame, whose center is at point 88, longer than the diameter of the shoulder 91, and the diameter of the part centered on the axis 87 of the coil in the release position is between the diameter of the shoulder 91 and the diameter of the toothed part 92. Therefore, assembly the coil 89 may be inserted into the frame 85 by displacing its axis with the center 88, but after assembly, the plates 23 and 30 of the sliding bearings prevent the coil 89 from axial movement relative to the frame 85 from moving the coil axis towards the point 88.

The teeth of segments 5 and 81 (Figures 1 and 11) can be made so that each tooth comes into contact with resp. Because the coil tooth coils simultaneously with the others, but in practice, manufacturing tolerances make it difficult to obtain such cohesion, as a result of which one of the teeth undergoes more wear than others during normal operation (i.e., under emergency conditions). This difficulty (FIG. 14) can be overcome by making a cut in the support surface 93 of one of the teeth of each gear segment 5 to accommodate an additional tooth 94 of elastic plastic, made in one piece with the end elements 19 and 27 of the two cassettes 17 and 18. Contacting side the surface 95 of the tooth 94 slightly protrudes relative to the surface 93. As a result, the resilient plastic tooth 94 is that part of the toothed segments 5, which is always the first to come into contact with the teeth of the disks 8 and 9 and, therefore, takes all s from the operation of the locking mechanism during normal acceleration, smooth braking and cornering of the car on which the retractor is mounted. Under accident conditions, tooth 94 is compressed to a degree sufficient for the remaining teeth of the segments 5 to engage in engagement with the teeth of the disks 8 and 9, and in all the emergency load.

The tooth 94 may also be provided on the frame shown in FIG. 11 and

12, and can also be used in combination with a coil having trapezoidal teeth (FIG. 9).

Claims (9)

1. Emergency locking retractor for a vehicle safety belt, containing two frame elements parallel to each other, a reel having a shaft for winding the belt and a corresponding disc at each end of the shaft with evenly distributed teeth on its periphery, frame elements in bearings installed with the possibility of limited movement of the coil axis relative to the frame elements in a direction perpendicular to the axis of rotation between the position and the coupling position, in which the locking teeth are engaged with the teeth on said frame members to prevent the coil from rotating, elastic means for biasing the coil to the tripping position and driving means for moving the coil to the gripping position, characterized in that reduce the complexity of manufacturing, the tops of the teeth on the frame elements are located on a circle centered on the axis of the coil when position of the latter in the uncoupling position, and depressions between adjacent teeth on the frame elements are located on a circle with a radius equal to the maximum radius of the coil, centered on the axis of the coil when the latter is in the adhesion position, with the interlocking side surface of each tooth facing away from the plane of movement of the axis of the coil, is located at an angle to the radial line from this tooth to the center of the axis of the coil when the latter is in the adhesion position ited each tooth on the discs and corresponding to its radius, but blocking the side surfaces of the teeth on the frame cells addressed these surfaces towards the said plane of movement of the coil axis and parallel to this plane. 2. The device according to claim 1, characterized in that the coil disks are provided with flanges projecting radially outwardly beyond the teeth to interact with the side surfaces of the frame elements and prevent axial movement of the coil. 3. The device according to paragraphs. 1 and 2, T is characterized by the fact that a spacer is installed between the frame elements and provided with lateral legs perpendicular to it, projecting radially inwardly relative to the teeth on the frame elements to interact with the lateral surfaces of the discs with axial displacement of the coil. 4. Device on PP. 1 and 2, about t - in that the locking teeth of the coil have a symmetrical trapezoidal profile. 5. Device on PP. 1-4, which is based on the fact that the coil is made as a solid casting. 6. The device according to claims 1-5, of which is inclusive. the fact that the disks are attached to the shaft of the coil. 7. The device according to claim 1, wherein the framework elements are provided with openings for inserting the coil downward, and its teeth are made on the surfaces that delimit the notches. 8. Pop-1 device, which differs from the fact that in the framework elements there are cuts, limited by a closed edge, on which the said cage teeth are spreading, covering the corresponding disk. 9. A device according to Claim 1, characterized in that an additional tooth is made on at least one of the framework elements, the contacting surface of which is made of a soft elastic material and is offset at an angle forward relative to the coking surface of the other teeth. Phage 2 Fia 3S - 6 -X ..5 J5 B5 69 70 t 9 FIG. Sh. Editor G. Volkova Compiled by L.Smolska Tehred L.Serdyukova Proofreader M.Samborska 904/63 Tyr g 599. Subscription to VNIIPI of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4