CN111688549B - Easy-entry seat - Google Patents
Easy-entry seat Download PDFInfo
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- CN111688549B CN111688549B CN202010576195.XA CN202010576195A CN111688549B CN 111688549 B CN111688549 B CN 111688549B CN 202010576195 A CN202010576195 A CN 202010576195A CN 111688549 B CN111688549 B CN 111688549B
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- locking
- hook
- lock
- unlocking
- plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
- B60N2/14—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable rotatable, e.g. to permit easy access
- B60N2/146—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable rotatable, e.g. to permit easy access characterised by the locking device
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- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
The invention discloses an easy-entry seat which comprises a seat framework, a locking plate, a first locking part and a second locking part, wherein the locking plate is rotatably connected with the bottom of the seat framework and is provided with a first locking hook and a second locking hook; the easy-entry seat at least comprises a use state and a tilting and holding state; in the using state, the first locking hook is locked with the first locking piece; after the first lock hook and the first locking part are unlocked, when the seat framework is turned forwards to the extreme position, the lock sheet moves to the tilting holding state locked by the second lock hook and the second locking part along with the seat framework. According to the invention, the first lock hook and the second lock hook are integrated on one lock plate, and all operations of locking the first lock hook, unlocking the first lock hook, locking the second lock hook and unlocking the second lock hook are realized through the rotation of the lock plate. The invention has the advantages of compact structure, high integration level, small occupied space and low cost.
Description
Technical Field
The invention relates to the technical field of automobile seats, in particular to an easy-entry seat.
Background
Easy entry systems (E-E for short) are commonly used in the second row of seven SUV seats to provide room for the third row of occupants to enter and exit. The easy entry system enables the second row of seats to be locked with the upper slide rail during normal use, preventing the seats from sliding; when it is necessary to give access to the space, the seat is turned forward, and when the seat is turned to the extreme position, it is necessary to keep the seat at the extreme position in order to prevent the seat from falling backward.
The locking and the posture maintaining of the seat in the prior art are realized by two independent mechanisms respectively. Wherein, the locking pair of the seat is connected with the locking steel wire of the upper slide rail through a ground lock; and posture maintenance is generally achieved by using a dead point principle of a four-bar linkage or a tooth-grasping principle of a ratchet.
However, the two functions of practical locking and posture maintaining are realized by two independent systems, so that the structure is complex, the number of parts is large, the occupied space is large, and the cost is high.
Therefore, there is a need for an easy entry seat that is compact, integrated, small and inexpensive.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the easy-entry seat which is compact in structure, high in integration level, small in occupied space and low in cost.
The technical scheme of the invention provides an easy-entry seat which comprises a seat framework, a locking plate, a first locking part and a second locking part, wherein the locking plate is rotatably connected with the bottom of the seat framework and is provided with a first locking hook and a second locking hook;
the easy-entry seat at least comprises a use state and a tilting and holding state;
in the using state, the first locking hook is locked with the first locking piece;
after the first lock hook and the first locking part are unlocked, when the seat framework is turned forwards to the extreme position, the lock sheet moves to the tilting holding state locked by the second lock hook and the second locking part along with the seat framework.
Further, the locking plate still includes carousel and axis of rotation, the shaft hole has been seted up on the carousel, the axis of rotation passes the shaft hole with the carousel is connected, the lower limb of carousel uses the axis of rotation extends as the center first latch hook with the second latch hook, the second latch hook is located the place ahead of first latch hook.
The locking device further comprises an unlocking unit, wherein the unlocking unit comprises an operating piece and a steel wire, one end of the steel wire is connected with the operating piece, and the other end of the steel wire is connected with the locking plate;
when the operating piece pulls the steel wire, the steel wire is connected with the first lock hook, and the steel wire drives the lock plate to rotate;
when the first lock hook is unlocked from the first locking part, the steel wire drives the lock plate to rotate anticlockwise around the rotating shaft to a first unlocking angle;
when the second lock hook and the second locking part are unlocked, the steel wire drives the lock plate to rotate anticlockwise around the rotating shaft to a second unlocking angle.
Furthermore, the device also comprises a return spring, and the return spring is sleeved on the rotating shaft;
after the first lock hook and the first locking part are unlocked, the steel wire 71 releases the lock plate, and the return spring drives the lock plate to return to the position with the zero rotation angle;
when the second lock hook and the second locking part are unlocked, the steel wire releases the lock plate, and the reset spring drives the lock plate to return to the position with the zero rotation angle;
the first lock hook comprises a first lock groove and a first inclined surface, the first lock groove is clamped with the first locking part, and the first inclined surface is positioned on the bottom surface of the first lock hook;
when the lock plate returns to the position with the zero rotation angle, the first inclined surface is in contact with the first locking piece, and the first inclined surface guides the first locking piece to enter the first lock groove.
Further, the contact position of the first inclined surface and the first locking piece is a locking point, when the locking force F1 at the locking point is not more than 100N, the distance between the locking point and the center of the rotating shaft is L, the included angle between L and F1 is theta, and the theta is not more than 68.24 degrees.
Further, the length of the effective locking surface of the first locking groove is more than or equal to 9.8 mm.
Furthermore, the first locking hook further comprises a first unlocking vacancy, the first unlocking vacancy is located between the tip end of the first locking hook and the second locking hook, and the distance between the front end and the rear end of the first unlocking vacancy is larger than or equal to 16 mm.
An included angle between a connecting line between the front end and the rear end of the first unlocking vacancy and the center of the rotating shaft is an unlocking angle, and the unlocking angle alpha is more than or equal to 30 degrees.
Further, the unlocking operation force F of the locking plate by the steel wireT，lTThe distance between the center of the rotating shaft and the steel wire operating point;
when F is presentTWhen the number is less than or equal to 100N, lT≥12.6mm。
Further, a contact point when the first locking hook is locked with the first locking member is a first locking point, and a pressure angle β of the first locking point is 3 ° to 5 °.
Furthermore, the cross section thickness of the first lock hook corresponding to the first locking point is b, the cross section height is a, wherein b is 6mm-10mm, and a is more than 6 mm.
Furthermore, a contact point when the second locking hook is locked with the second locking part is a second locking point, the height of the section of the second locking point is h, and h is more than or equal to 6.8 mm.
After adopting above-mentioned technical scheme, have following beneficial effect:
according to the invention, the locking of the first locking hook and the first locking part is realized in the using state of the seat, and the tilting posture of the seat is kept by locking the second locking hook and the second locking part. According to the invention, the first lock hook and the second lock hook are integrated on one lock plate, and all operations of locking the first lock hook, unlocking the first lock hook, locking the second lock hook and unlocking the second lock hook are realized through the rotation of the lock plate. The invention has the advantages of compact structure, high integration level, small occupied space and low cost.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
FIG. 1 is a schematic view of an easy entry seat in an embodiment of the present invention in use and in a tilted up holding position;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of a portion of an easy entry seat in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged partial view of a tilt hold condition of an easy entry seat in an embodiment of the present invention;
FIG. 5 is a schematic view of a drop lock verification of the first latch hook of the locking tab in an embodiment of the present invention;
FIG. 6 is another illustration of a drop lock verification of the first shackle of the locking tab in accordance with an embodiment of the present invention;
fig. 7 is a schematic view illustrating the checking of the unlocking operation force of the first latch hook of the lock plate in the embodiment of the present invention;
FIG. 8 is a schematic view of a locking reliability check of the first locking hook of the locking plate according to an embodiment of the present invention;
FIG. 9 is a schematic illustration of a strength check of the first shackle of the lock plate in an embodiment of the present invention;
FIG. 10 is a cross-sectional view taken at A-A of FIG. 9;
FIG. 11 is a schematic view of a strength check of a second shackle of a lock plate in an embodiment of the present invention;
FIG. 12 is a cross-sectional view taken at B-B of FIG. 11;
fig. 13 is a schematic view illustrating the checking of the movement space of the first latch hook of the locking tab according to an embodiment of the present invention.
Reference symbol comparison table:
a seat frame 1;
locking plate 2: the locking device comprises a first locking hook 21, a second locking hook 22, a rotary disc 23, a rotating shaft 24, a first locking groove 211, a first inclined plane 212, a first unlocking vacancy 213, a shaft hole 231, a second locking groove 221, a second inclined plane 222 and a second unlocking vacancy 223;
a first locking member 3;
a second locking member 4;
an upper slide rail 5 and an upper slide rail bracket 6;
an unlocking unit (7): a steel wire 71;
a return spring 8.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
In an embodiment of the invention, as shown in fig. 1-4, the easy entry seat includes a seat frame 1, a locking plate 2, a first locking member 3 and a second locking member 4, the locking plate 2 is rotatably connected to the bottom of the seat frame 1, and the locking plate 2 is provided with a first locking hook 21 and a second locking hook 22;
the easy-entry seat at least comprises a use state and a tilting and maintaining state;
in the use state, the first locking hook 21 is locked with the first locking member 3;
after the first latch hook 21 is unlocked from the first locking member 3, when the seat frame 1 is flipped forward to the extreme position, the latch plate 2 moves with the seat frame 1 to the tilt-up holding state where the second latch hook 22 is locked with the second locking member 4.
In fig. 1 to 2, the seat frame 1 and the lock plate 2 show the use state, and the seat frame 1 'and the lock plate 2' show the tilt holding state.
Specifically, the seat frame 1 is a metal frame of the seat, and the seat frame 1 can move forward and backward together with the upper slide rail 5 and the upper slide rail bracket 6 to adjust the front and rear positions of the seat. And the seat framework 1 can also be turned forwards for getting out of the back evacuation room, so that passengers can conveniently enter the back row seats.
The lock plate 2 is mounted on the bottom edge of the seat frame 1, and the lock plate 2 can rotate relative to the seat frame 1. The locking plate 2 comprises a first locking hook 21 and a second locking hook 22, the first locking hook 21 cooperating with the first locking member 3 and the second locking hook 22 cooperating with the second locking member 4. The locking plate 2 is of a one-piece structure and integrates a first locking hook 21 and a second locking hook 22. In this embodiment, as shown in fig. 3, the lock plate 2 is locked to the first locking member 3, and at this time, the easy-entry seat is in a use state, and the bottom of the seat frame 1 is substantially in a horizontal plane. The seat easy to enter is kept in a normal seat using state by locking the first locking hook 21 with the first locking member 3, and the seat is prevented from overturning.
As shown in fig. 4, when it is desired that the easy entry seat be flipped forward, the first lock hook 21 and the first lock release member 3 are unlocked by forward rotation of the lock plate 2 (rotation in the counterclockwise direction of fig. 4). After the unblock, seat skeleton 1 overturns the perk forward under the effect of upset spring, and the bottom of seat skeleton 1 is raised, drives locking plate 2 and raises and moves forward together. After the locking plate 2 moves forwards and upwards along with the seat framework 1, the position of the second locking part 4 is reached, so that the second locking hook 22 and the second locking part 4 are locked and enter a tilting and holding state, and the seat which is easy to enter is held at the limit position which is overturned forwards. The easy-entry seat does not need to be always held by a user, and the easy-entry seat is prevented from being turned backwards to hurt passengers in the process that the user enters the rear-row seat.
When the passenger enters the back row seat, the easy-entry seat needs to be returned to the use state. Further counterclockwise rotation of the locking plate 2 causes the second locking hook 22 to unlock the second locking member 4. The seat frame 1 is turned backwards, the locking plate 2 rotates clockwise under the action of the self return spring 8, and when the seat frame 1 returns to the position in the using state, the first locking hook 21 and the first locking part 3 are locked again to keep the seat frame 1 at the position in the using state.
In the present embodiment, the locking of the seat is realized by the locking of the first locking hook 21 and the first locking member 3, and the tilting posture of the seat is maintained by the locking of the second locking hook 22 and the second locking member 4. In the present embodiment, the first locking hook 21 and the second locking hook 22 are integrated on one locking plate 2, and all operations of locking the first locking hook 21, unlocking the first locking hook 21, locking the second locking hook 22, and unlocking the second locking hook 22 are realized by rotation of the locking plate 2. The embodiment has the advantages of compact structure, high integration level, small occupied space and low cost.
Further, as shown in fig. 3 to 4, the easy entry seat further includes an upper slide rail 5 and an upper slide rail bracket 6, and the seat frame 1 can move forward and backward together with the upper slide rail 5 and the upper slide rail bracket 6;
the upper slide rail bracket 6 is mounted on the upper slide rail 5, the first locking member 3 and the second locking member 4 are both mounted on the upper slide rail bracket 6, and the second locking member 4 is located in front of the first locking member 3.
The first and second locking members 3 and 4 are stationary, the second locking member 4 is located in front of the first locking member 3, and the height of the second locking member 4 is higher than the height of the first locking member 3. Therefore, when the lock plate 2 turns and tilts along with the seat frame 1 anticlockwise, the lock plate can be locked with the second locking piece 4.
Specifically, the first locking member 3 may be a U-shaped structure made of a steel wire, and both ends of the U-shaped structure are fixed to the upper rail bracket 6.
The second locking member 4 may be a U-shaped structure made of steel wire, both ends of which are fixed to the upper rail bracket 6.
Alternatively, the first and second locking members 3, 4 may also be made of other structures or materials.
Alternatively, the first and second locking elements 3, 4 can also be connected directly to the upper rail 5, the first and second locking elements 3, 4 being fixed stationary relative to the upper rail 5.
Further, as shown in fig. 5, the locking plate 2 further includes a rotating disc 23 and a rotating shaft 24, the rotating disc 23 is provided with a shaft hole 231, the rotating shaft 24 penetrates through the shaft hole 231 and is connected with the rotating disc 23, the lower edge of the rotating disc 23 extends out of the first locking hook 21 and the second locking hook 22 by taking the rotating shaft 24 as a center, and the second locking hook 22 is located in front of the first locking hook 21.
The radii of the first locking hook 21 and the second locking hook 22 from the rotating shaft 24 are equal, that is, the first locking hook 21 and the second locking hook 22 both rotate around the center of the rotating shaft 24. The second locking hook 22 is located at the position of the first locking hook 21 in the clockwise direction of fig. 5.
Further, as shown in fig. 3-4, the locking device further comprises an unlocking unit 7, wherein the unlocking unit 7 comprises an operating piece and a steel wire 71, one end of the steel wire 71 is connected with the operating piece, and the other end of the steel wire 71 is connected with the locking plate 2;
when the operating element pulls the wire 71, the wire 71 drives the locking plate 2 to rotate, so that the first locking hook 21 is unlocked from the first locking element 3, and the second locking hook 22 is unlocked from the second locking element 4.
Specifically, the operating member can be installed on the side of the backrest of the easy entry seat, which is convenient for the user to operate. The upper end of the steel wire 71 is connected with the operating piece and then passes through the seat frame 1, and the lower end of the steel wire 71 is connected with the locking piece 2.
As shown in fig. 5, the locking plate 2 is provided with a wire operating point G, which is located at the rear side of the first locking hook 21, i.e., in the counterclockwise direction of fig. 5.
When a user presses the operating element, the operating element drives the steel wire 71 to move upwards, the steel wire 71 pulls the steel wire operating point G to drive the locking plate 2 to rotate counterclockwise in fig. 5, and the first locking hook 21 and the first locking element 3 are unlocked, and the second locking hook 22 and the second locking element 4 are unlocked.
When the user releases the operating piece, the steel wire 71 does not act on the locking plate 2 any more, and the locking plate 2 rotates clockwise under the action of the return spring 8 to a natural state that the return spring 8 does not store energy.
Further, the steel wire 71 is connected with the first locking hook 21;
when the first locking hook 21 is unlocked from the first locking member 3, the steel wire 71 drives the locking plate 2 to rotate counterclockwise around the rotating shaft 24 to a first unlocking angle;
when the second locking hook 22 is unlocked from the second locking member 4, the wire 71 drives the locking plate 2 to rotate around the rotating shaft 24 to a second unlocking angle.
The operation of the operating member and the wire 71 has two operations:
during the first operation, locking plate 2 revolves the rotation axis 24 anticlockwise rotation and reaches first unblock angle, and first latch hook 21 unlocks with first locking piece 3, releases the operating parts, and locking plate 2 gets back to initial angle under reset spring 8 effect, and locking plate 2 moves along with seat frame 1 forward upwards, and the second inclined plane 222 of second latch hook 22 contacts with second locking piece 4, and under the guide of second inclined plane 222, second latch hook 22 anticlockwise rotation for second latch hook 22 locks with second locking piece 4.
In the second operation, the locking plate 2 rotates counterclockwise to a second unlocking angle, and the second locking hook 22 is unlocked from the second locking member 4.
Further, as shown in fig. 5, the device further comprises a return spring 8, wherein the return spring 8 is sleeved on the rotating shaft 24;
after the first locking hook 21 and the first locking member 3 are unlocked, the steel wire 71 releases the locking plate 2, and the return spring 8 drives the locking plate 2 to return to the position where the rotation angle is zero;
after the second locking hook 22 and the second locking member 4 are unlocked, the steel wire 71 releases the locking plate 2, and the return spring 8 drives the locking plate 2 to return to the position where the rotation angle is zero;
the first latch hook 21 comprises a first latch slot 211 and a first inclined surface 212, the first latch slot 211 is clamped with the first locking member 3, and the first inclined surface 212 is positioned on the bottom surface of the first latch hook 21;
when the locking piece 2 is returned to the position where the rotation angle is zero, the first inclined surface 212 comes into contact with the first locking member 3, and the first inclined surface 212 guides the first locking member 3 into the first lock groove 212.
Specifically, the cross section of the first locking member 3 is circular, and the bottom end of the first locking groove 211 is circular arc-shaped in order to better fit the first locking member 3. When the first locking member 3 enters the first lock groove 211, the first locking member 3 is held in the first lock groove 211, and locking is achieved.
The first inclined surface 212 is located on the bottom surface of the first lock hook 21, when the return spring 8 drives the lock plate 2 to return to the position where the rotation angle is zero and the easy-entry seat turns backward, the first inclined surface 212 contacts the first locking member 3 first, and the contact point between the first inclined surface 212 and the first locking member 3 is the lock-falling point C.
Since the first slope 212 is inclined forward and upward, i.e., leftward and upward in fig. 5. When the first inclined surface 212 contacts with the first locking member 3, the seat frame 1 continues to turn backwards and downwards, so that the locking plate 2 generates a short counterclockwise rotation stroke, the first locking member 3 slides relative to the first inclined surface 212, finally the first locking member 3 enters the first locking groove 212 from the first unlocking gap 213, the locking plate 2 rotates clockwise again, and returns to the position where the rotation angle is zero (as shown in fig. 6), and the first locking hook 21 is locked with the first locking member 3.
Further, as shown in fig. 5 to 6, the contact position of the first inclined surface 212 and the first locking member 3 is a lock-down point C, and the lock-down force F at the lock-down point C1When the distance between the locking point C and the center of the rotating shaft 24 is less than or equal to 100N, the distance between the locking point C and the center of the rotating shaft 24 is L, and L and F1The included angle between the two is theta which is not more than 68.24 degrees.
F1L1≥M1+FfLf
F1L coSθ≥M1+μF1 Lsinθ
Wherein L is1Is the center of the rotation axis 24 and F1The vertical distance between the extension lines of (a);
M1the moment at the lock-down point C;
Ffthe component force at the lock falling point C along the tangential direction;
Lfis the center of the rotation axis 24 and FfThe vertical distance between the extension lines of (a);
the coefficient of surface friction mu between the first locking member 3 and the first locking hook 21 is 0.09-0.13;
when falling off the locking force F1When the nitrogen content is less than or equal to 100N;
b is larger than 6mm, generally 6-10 mm, D is generally 8-10 mm, and R is 14-18 mm;
wherein b is a distance between the first locking point E and the falling point C of the first locking member 3 and the first locking groove 211 when the first locking hook 21 is locked with the first locking member 3;
d is the diameter of the cross section of the first locking member 3;
r is the distance between the center of the rotating shaft 24 and the upper contact point I;
r + D + b, wherein L is 28-38 mm;
M1＝F1l, then M1＝0.3N.m～0.7N.m；
Calculating to obtain L and F according to the formula1The included angle theta is less than or equal to 68.24 degrees.
And theta is not less than 68.24 degrees, which is the locking condition of the first locking hook 21.
Further, as shown in fig. 5, the second locking hook 22 includes a second locking groove 221, a second inclined surface 222 and a second unlocking gap 223, and the locking condition of the second locking hook 22 is obtained in a manner similar to that of the first locking hook 21.
Theta of the second lock hook is not more than 68.24 degrees, and the requirement that a lock falling point is away from the center of a circle is 28-38 mm.
Further, as shown in fig. 13, an effective lock-attaching surface L of the first lock groove 211ABThe length of the groove is more than or equal to 9.8 mm.
In order to ensure the locking reliability of the first locking hook 21, the effective locking surface L of the first locking groove 211ABSufficient length is required to cover the 20 ° turn range, so the AB region in fig. 13 should be:
d is generally 8-10 mm, and R is 14-18 mm
As shown in FIG. 13, LABFor the distance from the tip of the first latch hook 21 to the first lock point E, L is calculatedAB≥9.8mm。
Further, as shown in fig. 5 and 13, the first locking hook 21 further includes a first unlocking gap 213, the first unlocking gap 213 is located between the tip T of the first locking hook 21 and the second locking hook 22, and a distance L between the front end and the rear end of the first unlocking gap 213GH≥16mm。
The angle between the connecting line between the front and rear ends of the first unlocking gap 213 and the center of the rotating shaft 24 is an unlocking angle, and the unlocking angle alpha is not less than 30 degrees.
For smooth unlocking, the tip T of the first latch hook should be able to completely cross the locking/unlocking path (i.e. QJ) of the first locking member 3 during unlocking, and the unlocking angle α should be:
α≥30°
thus, the first lock surface has an inner arc length LEFIt should satisfy:
at the same time, the arc r of the first unlocking gap 2131It should satisfy:
the distance from the tip T of the first locking hook 21 to the back of the second locking hook 22 is such that:
LGHnot less than 1.6D to obtain LGH≥16mm。
Further, as shown in fig. 7, the unlocking of the locking piece 2 by the wire 71Operating force FT，lTThe distance between the center of the rotating shaft 24 and the wire operating point B;
when F is presentTWhen the nitrogen content is less than or equal to 100N,
r is taken to be 14-18 mm,
M1＝0.3N.m～0.7N.m，
FNthe general range of the weight of the seat is 170N-440N, FNReaction of the seat weight to the first locking member 3 under positive pressure, FbIs the static friction between the locking tab 2 and the first locking member 3.
The pressure angle beta is generally 3-5 degrees;
the surface friction coefficient mu between the first locking part 3 and the first locking hook 21 is 0.09-0.13;
FTlT+FNlN≥M1+FbR
Fb＝μFN lN＝R tanβ
the following is obtained by the above calculation formula: lT≥12.6mm。
Thus, lTThe unlocking condition of the first locking hook 21 and the first locking part 3 is more than or equal to 12.6 mm.
Similarly, the unlocking condition of the second latch hook 22 and the second latch member 4 is obtained in a similar manner to the above.
Further, as shown in fig. 8, the lower contact point when the first latch hook 21 is latched to the first latch member 3 is a first latch point E, and the pressure angle β of the first latch point E is 3 ° to 5 °.
To ensure reliable locking, a self-locking condition between the first locking hook 21 and the first locking member 3 needs to be satisfied, i.e. the locking torque is always greater than the unlocking torque.
FL1≤FfL2+MTorsion bar
FL1≤μFL2+MTorsion bar
The size of the M torsion is not considered, the following conditions are met, and self-locking can be ensured:
since the range of mu is 0.09 to 0.13,
the pressure angle beta should satisfy beta being less than or equal to 5.14 degrees,
the pressure angle beta should be in the range of 3-5 degrees in consideration of the safety margin,
and the pressure angle at the locking surface also satisfies 3-5 degrees when the first locking piece 3 presses the locking plate 2 inwards.
The locking reliability of the first locking hook 21 is checked in the above manner.
Alternatively, the locking reliability of the second locking hook 22 is checked in the above manner.
Further, as shown in fig. 9-10, the first locking hook 21 has a cross-sectional thickness b and a cross-sectional height a corresponding to the first locking point E, wherein b is 6mm to 10mm, and a > 6 mm.
Check the most dangerous shear-resistant section of the first shackle 21:
F＝23KN
[τ]＝0.6～0.8[σ]＝648～864MPa
therefore, ab > 35.5mm is required2，
The thickness b of the first lock hook 21 is usually 6mm-10mm
It is required that the section height a should be in the range of a > 6 mm.
Optionally, the second latch hook 22 should also satisfy the above requirements.
Further, as shown in fig. 11-12, the contact point when the second locking hook 22 is locked with the second locking member 4 is a second locking point F, the cross-sectional height of the second locking point F is h, and h is greater than or equal to 6.8 mm.
Checking the most dangerous bending-resistant section of the second lock hook:
through the stress balance equation, it can be obtained that the positive tension of the second locking member 4 on the second locking hook 22 is F when the tilting posture is maintainedpIn order to satisfy the severe abuse force, F is setp≥5440N，lpIs 7 mm-9 mm.
The critical section torque is:
M＝Fplp＝5440×0.009＝49N.m，
flexural modulus of
Require that
Usually, the thickness b of the second locking hook 22 is 6mm-10mm, and the dangerous section height h of the second locking point F is more than or equal to 6.8 mm.
The integrated locking plate 2 designed in the mode can realize locking in a use state and a tilting posture holding state at the same time, and has the advantages of compact structure, high integration level, easiness in operation, small occupied space and low cost.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. The easy-entry seat is characterized by comprising a seat framework (1), a locking plate (2), a first locking part (3) and a second locking part (4), wherein the locking plate (2) is rotatably connected with the bottom of the seat framework (1), and the locking plate (2) is provided with a first locking hook (21) and a second locking hook (22);
the easy-entry seat at least comprises a use state and a tilting and holding state;
in the use state, the first locking hook (21) is locked with the first locking part (3);
after the first lock hook (21) and the first locking part (3) are unlocked, when the seat frame (1) is turned forwards to the limit position, the lock plate (2) moves to the tilting holding state locked by the second lock hook (22) and the second locking part (4) along with the seat frame (1); locking plate (2) still include carousel (23) and axis of rotation (24), shaft hole (231) have been seted up on carousel (23), axis of rotation (24) pass shaft hole (231) with carousel (23) are connected, the lower limb of carousel (23) with axis of rotation (24) extend as the center first latch hook (21) with second latch hook (22), second latch hook (22) are located the place ahead of first latch hook (21).
2. Easy entry seat according to claim 1, further comprising an unlocking unit (7), said unlocking unit (7) comprising an operating member and a wire (71), one end of said wire (71) being connected to said operating member and the other end being connected to said locking plate (2);
when the operating piece pulls the steel wire (71), the steel wire (71) is connected with the first locking hook (21), and the steel wire (71) drives the locking plate (2) to rotate;
when the first lock hook (21) and the first locking part (3) are unlocked, the steel wire (71) drives the lock plate (2) to rotate anticlockwise around the rotating shaft (24) to a first unlocking angle;
when the second locking hook (22) and the second locking part (4) are unlocked, the steel wire (71) drives the locking plate (2) to rotate anticlockwise around the rotating shaft (24) to a second unlocking angle.
3. Easy entry seat according to claim 2, further comprising a return spring (8), said return spring (8) being fitted over said rotation shaft (24);
when the first lock hook (21) and the first locking part (3) are unlocked, the steel wire (71) releases the lock plate (2), and the reset spring (8) drives the lock plate (2) to return to a position with a zero rotation angle;
after the second lock hook (22) and the second locking part (4) are unlocked, the steel wire (71) releases the lock plate (2), and the return spring (8) drives the lock plate (2) to return to a position with a zero rotation angle;
the first lock hook (21) comprises a first lock groove (211) and a first inclined surface (212), the first lock groove (211) is clamped with the first locking part (3), and the first inclined surface (212) is positioned on the bottom surface of the first lock hook (21);
when the lock plate (2) returns to the position with the rotation angle being zero, the first inclined surface (212) is in contact with the first locking piece (3), and the first inclined surface (212) guides the first locking piece (3) to enter the first locking groove (211).
4. The easy entry seat according to claim 3, wherein the contact point of the first inclined surface (212) and the first locking member (3) is a lock-down point, and when a lock-down force F1 at the lock-down point is not greater than 100N, a distance between the lock-down point and a line connecting the center of the rotation shaft (24) is L, and an angle between the line and a direction of F1 is θ, and θ is not greater than 68.24 °.
5. Easy entry seat according to claim 3, characterized in that the length of the effective locking surface of the first locking groove (211) is ≥ 9.8 mm.
6. The easy entry seat according to claim 3, wherein the first latch hook (21) further comprises a first unlocking void (213), the first unlocking void (213) is located between the tip of the first latch hook (21) and the second latch hook (22), and the distance between the front end and the rear end of the first unlocking void (213) is greater than or equal to 16 mm;
the included angle of a connecting line between the front end and the rear end of the first unlocking vacancy (213) and the center of the rotating shaft (24) is an unlocking angle, and the unlocking angle alpha is more than or equal to 30 degrees.
7. Easy entry seat according to claim 2, characterized in that the unlocking operating force F of the wire (71) on the locking tab (2)T，lTIs the distance between the center of the rotating shaft (24) and the wire operating point;
when F is presentTWhen the number is less than or equal to 100N, lT≥12.6mm。
8. Easy entry seat according to claim 1, characterized in that the point of contact when said first locking hook (21) is locked with said first locking member (3) is a first locking point, the pressure angle β of which is 3 ° -5 °.
9. The easy entry seat of claim 8 wherein the first locking hook has a cross-sectional thickness b and a cross-sectional height a at the first locking point, wherein b is 6mm to 10mm and a > 6 mm.
10. Easy entry seat according to claim 1, characterised in that the point of contact when the second locking hook (22) is locked with the second locking member (4) is a second locking point, the second locking point having a cross-sectional height h ≧ 6.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576195.XA CN111688549B (en) | 2020-06-22 | 2020-06-22 | Easy-entry seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576195.XA CN111688549B (en) | 2020-06-22 | 2020-06-22 | Easy-entry seat |
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| Publication Number | Publication Date |
|---|---|
| CN111688549A CN111688549A (en) | 2020-09-22 |
| CN111688549B true CN111688549B (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010576195.XA Active CN111688549B (en) | 2020-06-22 | 2020-06-22 | Easy-entry seat |
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| CN (1) | CN111688549B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207510267U (en) * | 2017-10-24 | 2018-06-19 | 延锋安道拓座椅有限公司 | A kind of holding of easy entered function automotive seat and fixed point return mechanism |
| US10442322B2 (en) * | 2017-11-17 | 2019-10-15 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft | Easy-entry vehicle seat |
| CN207984626U (en) * | 2018-03-27 | 2018-10-19 | 佛吉亚（中国）投资有限公司 | A kind of sliding rail of automobile seat unlocking mechanism |
| CN208085536U (en) * | 2018-03-27 | 2018-11-13 | 重庆延锋安道拓汽车部件***有限公司 | It easily uses easily to enter into unlocking mechanism and solves lock plate structure |
| CN208006770U (en) * | 2018-03-27 | 2018-10-26 | 重庆延锋安道拓汽车部件***有限公司 | Seat easily enters unlocking mechanism |
| CN109664803B (en) * | 2019-01-17 | 2024-03-01 | 广西双英集团股份有限公司 | Seat convenient for rear-row passengers to easily enter |
| CN110466396A (en) * | 2019-09-19 | 2019-11-19 | 上海国琻汽车科技有限公司 | Automotive seat easily into the sliding rail stroke switching mechanism of seat and comprising it |
| CN210707001U (en) * | 2019-09-19 | 2020-06-09 | 上海国琻汽车科技有限公司 | Easy-to-enter posture keeping and returning mechanism and automobile seat comprising same |
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2020
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| CN111688549A (en) | 2020-09-22 |
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