CN217783208U

CN217783208U - Lock for automobile engine cover

Info

Publication number: CN217783208U
Application number: CN202122122138.7U
Authority: CN
Inventors: 乔治·拉多米尔
Original assignee: Brano AS
Current assignee: Brano AS
Priority date: 2020-09-03
Filing date: 2021-09-03
Publication date: 2022-11-11
Anticipated expiration: 2031-09-03
Also published as: CZ2020487A3; CZ308896B6; DE202021104638U1

Abstract

A lock for an automotive hood, comprising a base plate of the lock, a ratchet wheel and a latch being pivotally mounted to the base plate and having mutually parallel axes of rotation, the ratchet wheel having at least one partially radially extending recess along its periphery for receiving a hood shackle and having a continuous peripheral stop area along its periphery in one peripheral direction from the recess, the latch having a peripheral support area for engaging one of the peripheral stop areas of the ratchet wheel at a time for blocking an angular position of the ratchet wheel, wherein the ratchet wheel and the latch are mutually rotatable between a locked position, an unlocked position and a released position, and the ratchet wheel having a radial stop arm in another peripheral direction from the recess opposite to the peripheral direction from the recess, having at least one partially radial support area, the latch having a safety hook on which a retaining area is arranged for engaging the support area of the stop arm of the ratchet wheel.

Description

Lock for automobile engine cover

Technical Field

The utility model relates to a lock for automobile engine cover, include: a lock base plate to which the ratchet and the latch pivot are mounted and which has rotation axes parallel to each other; the ratchet wheel has at least one partial radial recess along its periphery for receiving a hood shackle and has a continuous peripheral stop area along its periphery in one peripheral direction from the recess; and the latch has a peripheral support region for engaging with each peripheral stop region of the ratchet so as to block the angular position of the ratchet; wherein the ratchet and the latch rotate relative to each other between: a locked position in which the support region of the latch engages the first stop region of the ratchet; an unlocked position wherein the support region of the latch engages the second stop region of the ratchet; and a release position in which the latch is disengaged from the ratchet to release movement of the hood shackle.

Background

Document CZ307352 discloses a lock with a snap hook for an automotive hood with a ratchet pivotally mounted between a base plate and a cover plate having a radial recess for receiving a pin of the hood, and a latch. The ratchet and latch each have a coupled spring that forces the ratchet into engagement with the latch. The ratchet has two continuous peripheral stop areas along its periphery and the latch has a peripheral support area along its periphery for engaging one of the peripheral stop areas of the ratchet and for blocking the angular position of the ratchet. The safety hook is pivotally mounted on the ratchet wheel along an axis parallel to the pivot mounting axis of the ratchet wheel; the snap hook has a hole through the center of rotation of the snap hook perpendicular to the radial extension. The safety hook has an arm with a free end, wherein a spring is provided between it and the base plate. The free end of the safety hook has a guide element which engages in a sliding manner with a straight guide projection on the base plate. In the initial locked position of the ratchet and latch, the hood pin extends into the radial recess of the ratchet and into the aperture of the snap hook. When the guide element of the free end of the snap hook engages with the straight guide projection, the axis of the hole of the snap hook extends substantially perpendicular to the movement of the pin of the bonnet and the snap hook prevents the pin of the bonnet from being released. Once the guide element of the free end of the safety hook is released from engagement with the rectilinear guide projection on the base plate, the safety hook swings along its axis mounted on the ratchet to the release position and fully releases the hood pin to allow lifting of the hood.

The lock comprises moving parts mounted on top of each other, which is disadvantageous with respect to functional accuracy and consistency. The arrangement of the lock is such that there is only one unlocked position between the extreme locked position and the extreme released position, in which the hood pin and hood are protected from release, which is not safe enough and not allowed by the current legislation.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to substantially eliminate the drawbacks of the prior art and to provide a lock for a motor vehicle hood which, unlike the prior art, can have a reliable safety position before the unlocking position of the ratchet and the latch; the position of the ratchet and the latch can be switched without recoiling the control cable; can be easily attached to the vehicle body and can be turned on either side, and can be more easily assembled and mounted on the vehicle body during the manufacturing process.

The disadvantages of the prior art are substantially eliminated and the objects of the invention are achieved by a lock for a vehicle hood.

The advantage of the lock for a motor vehicle hood according to the invention is primarily that the ratchet and the latch have an additional safety position before the unlocking position and the transition to the safety position does not kick back into the control cable. The lock for the bonnet of the vehicle according to the present invention contains fewer parts, occupies less space, is easy to connect to the body, and can be attached with either side upwards. Installation in the vehicle body during manufacture is greatly facilitated.

Drawings

Exemplary embodiments of an automotive hood according to the present invention are shown in the drawings, wherein,

FIG. 1 is a view of the lock oriented toward the base plate;

FIG. 2 is the lock in the locked position;

FIG. 3 is the lock in the secure position;

FIG. 4 is the lock in the unlocked position;

FIG. 5 is the lock in a released position;

FIG. 6 is a catch arm engaged with the safety hook;

fig. 7 is a snap hook with an installed cable.

List of reference numerals

1. Lock with a locking mechanism

2. Base plate

3. Cover plate

4. Hook ring

5. Opening in the bottom plate 2

6. Opening in cover plate 3

7. Guide hole of bottom plate 2

8. Guide hole of cover plate 3

11. Ratchet wheel

12. First stop region

13. Second stop region

14. Concave part

15. Catch arm

16. Support area for the stop arm 15

17. First cylindrical pin

21. Latch lock

22. Support region of latch 21

25. Safety hook

26. Holding area

27. Second cylindrical pin

28. Convex lug

29. Stay cable

30. Control arm

Direction of motion (sense) α of α -shackle 4

Normal beta to beta support surface 16

Normal gamma to gamma holding surface 26

r axis of rotation r of ratchet wheel 11

Rotation axis z of z-latch 21

Line p

Locked position

Safety position

Unlocking position

Releasing position

Detailed Description

According to fig. 1, a lock 1 for a motor vehicle hood has a base plate 2, in which base plate 2 a first cylindrical pin 17 and a second cylindrical pin 27 are fixedly mounted. The axis r of the first cylindrical pin 17 is parallel to the axis z of the second cylindrical pin 27, and both axes r, z are perpendicular to the substrate 2. On the first cylindrical pin 17 is pivotally mounted ratchet 11 and on the second cylindrical pin 27 is pivotally mounted latch 21. Between the ratchet 11 and the base plate 2 is a torsion spring (not shown) which acts on the ratchet 11 with a counterclockwise force. Between the ratchet 21 and the base plate 2 is a torsion spring (not shown) which acts on the latch 21 with a clockwise force. The torsion springs of the ratchet and latch act in opposite directions to each other: the ratchet torsion spring acts on the ratchet anticlockwise, and the latch torsion spring acts on the latch clockwise. The torsion spring engages the ratchet 11 and the latch 21. The latch has a radial arm to which the control cable is secured. The ratchet 11 has a recess 14 along its periphery which extends radially or at least partially radially and has a depth and width for receiving the hood shackle 4. The hood shackle 4 is substantially U-shaped, the free ends of the arms of the shackle being fastened to the hood and its connecting circular section which connects the arms, passing through the recess 14 in the ratchet 11. When opening and closing the hood, the hood shackle 4 slides along the axis α. In a direction perpendicular to the base plate 2, the arms of the shackle 4 exceed the distance between the base plate 2 and the lock cover plate (not shown). Thus, the base plate 2 has guide holes 7 and the locking plate 3 (not shown) has corresponding guide holes 8. The hood shackle 4 passes through the guide holes 7, 8 in a direction perpendicular to the floor panel 2. The axis α is the axis of symmetry of the guide holes 7, 8. Along its periphery, the

peripheral stop zones

12, 13 of the ratchet 11 are in one peripheral direction O from the recess 14 ₁ Or in a clockwise direction, they are arranged clockwise and spaced sequentially from the recesses 14. The latch 21 has a support area 22 along its periphery. The support region 22 of the latch 21 is arranged and shaped such that it serves as a support for the peripheral stop region 12 in one angular position of the ratchet 11 and as a support for the peripheral stop region 13 in another angular position of the ratchet 11, depending on the angle of rotation of the ratchet 11. The peripheral support region 22 of the latch 22 blocks the ratchet 11 in the respective angular position. In the peripheral direction O ₁ Opposite peripheral direction O ₂ Or counterclockwise, the ratchet wheel 11 has a substantially radial stop arm 15 with a facing circumferential direction O ₂ The support area 16. The latch 21 has a substantially radially projecting safety hook 25, the free end of which has a retaining region 26, substantially radially facing the axis of a second cylindrical pin 27. The free end of the latch 21 also has an opening lug 28 for receiving a cable. The base plate 2 and the cover plate 3 (not shown) have

openings

5, 6 for threading cables, which are coaxial and whose axes are perpendicular to the base plate 2. Furthermore, the latch 21 has a radial control arm which is connected to the lock control mechanism by a control cable (not shown).

In fig. 2 to 5, the ratchet 11 and the latch 21 are illustrated in a mutually locked position (fig. 2), a safety position (fig. 3), an unlocked position (fig. 4) and a release position (fig. 5).

According to fig. 2, the latch 21 blocks the ratchet 11 in the locked position, wherein the support area 22 of the latch 21 stops against the first stop area 12 of the ratchet 11. In the locking position, the ratchet 11 blocks the shackle 4 in a movement direction α of the shackle 4, which movement direction α passes between the rotational axis r of the ratchet 11 and the rotational axis z of the latch 21. To release the shackle 4 for the first time from the locked position of the ratchet 11 and the latch 21 according to fig. 2 into the safety position according to fig. 3, a counterclockwise moment is exerted on the latch 21. This releases the engagement of the support region 22 of the latch 21 with the first stop region 12 of the ratchet 11, and the support region 16 of the catch arm 15 of the ratchet 11 then fits onto the holding region 26 of the holding hook 25. In order to maintain the engagement between the support region 16 of the catch arm 15 of the ratchet 11 and the holding region 26 of the holding hook 25, the above-mentioned moment must continue to be exerted on the latch 21. Thus, the engagement of the snap hook 25 with the catch arm 15 generates almost zero friction. A force exerted on the control arm of the latch 21 in the counter-clockwise direction causes the latch 21 to rotate counter-clockwise and releases the engagement of the support region 22 of the latch 21 with the first stop region 12 of the ratchet 11, and the ratchet 11 is thus rotated counter-clockwise by the force of the torsion spring (not shown) into the safety position shown in fig. 3.

According to fig. 3, the latch 21 and the ratchet 11 are disengaged in the safety position. The latch 21 is rotated counterclockwise by the force of the control cable (not shown) and the ratchet 11 is rotated by the force of the torsion spring (not shown), causing the catch arm 15 of the ratchet 11 to engage the snap hook 25. Engagement takes place between the support region 16 of the catch arm 15 of the ratchet 11 and the holding region 26 of the safety hook 25. The force of the torsion spring (not shown) of the latch acts in opposition and must be less than the frictional force generated between the support area 16 of the catch arm 15 of the ratchet 11 and the retaining area 26 of the safety hook 25. The purpose of the safety position according to fig. 3 of the ratchet 11 and the latch 21 is to increase the safety of the lock and to ensure that the unlocked position according to fig. 4 is not directly followed after the first release from the locked position according to fig. 2 by interposing a safety position between the locked position and the unlocked position, which blocks the ratchet 11 before it enters the unlocked position. The force acting in the clockwise direction on the control arm of the latch 21 causes the snap hook 25 to rotate clockwise and due to the force of its torsion spring (not shown) releases the ratchet 11 for further counterclockwise rotation. To release the shackle 4 from the safety position according to fig. 3 of the ratchet 11 and the latch 21 for the second time to the unlocked position according to fig. 4, the moment exerted on the latch 21 ceases to act, the latch 21 is released due to the action of its return spring, the latch 21 is rotated clockwise, and the support area 22 of the latch 21 stops against the second stop area 13 of the ratchet 11. By mutual rotation, the latch 21 has its support area 22 engaged with the second stop area 13 of the ratchet 11 and blocks the ratchet 11 in the unlocked position according to fig. 4.

In the unlocked position according to fig. 4, the hood shackle 4 continues to be fixed in the recess 14 of the ratchet 11. The hood shackle 4 is released by a force acting in the counter-clockwise direction on the control arm of the latch 21. The support area 22 of the latch 21 disengages from the second stop area 13 of the ratchet 11 and the ratchet 11 rotates anticlockwise due to its own torsion spring (not shown), releasing the hood shackle 4 from the recess 14 to allow movement of the shackle 4 in the direction of movement a, and the ratchet 11 and latch 21 rotate to the position shown in figure 5.

According to fig. 5, the released hood shackle 4 allows the hood to be lifted. The hood is closed in such a way that the shackle 4 is first returned to the position according to fig. 5, and then the ratchet 11 and the latch 21 are brought into the position according to fig. 4, 3, 2 and 1 in the reverse order.

According to fig. 6, the support region 16 of the catch arm 15 of the ratchet 11 engages with the holding region 26 of the safety hook 25, as shown in fig. 3. The force F acting between the catch arm 15 of the ratchet 11 and the safety hook 25 can be resolved onto the normal N of the holding region 26 of the latch 21 and the support region 16 of the ratchet 11 and onto the tangent T of the holding region of the latch 2 and the support region 16 of the ratchet 11. The distance a represents the projection of the friction force T on a line connecting the ratchet 11 and the rotation axis of the latch 21. In order to eliminate backlash in the control cable to the latch 21 according to fig. 3, it is desirable that the distance a is as short as possible. The distance a may be reduced by both the "tangent to the ratchet circular motion T" at the contact point and the "normal to the latch support area N" at the contact point extending to the center of rotation of the latch 21.

According to fig. 7, the opening 6 of the base plate 2 and the opening 5 of the cover plate of the lock have a pull cord 29 running through them, engaging with a lug provided at the free end of the safety hook 25. By pulling the cable 29, a force can act on the safety hook 25 and the latch in a direction opposite to the direction of action of the torsion spring of the latch 21 (not shown) and ensure that the catch arm 15 of the ratchet 11 is blocked in the safety position, which can be advantageously used when mounting the lock in a vehicle body. The cable 29 can be easily removed after the lock is fastened to the vehicle body.

Claims

1. A lock for an automotive hood, comprising:

the base plate (2), ratchet (11) and latch (21) of the lock (1) are pivotally mounted to the base plate and have mutually parallelA rotation axis (r, z), the ratchet wheel (11) having at least one partially radially extending recess (14) along its circumference for receiving a hood shackle (4) and being in one circumferential direction (O) from the recess (14) along its circumference ₁ ) Having a continuous peripheral stop zone (12, 13) and said latch (21) having a peripheral support zone (22) for engaging one of said peripheral stop zones (12, 13) of said ratchet (11) at a time to block the angular position of said ratchet (11),

wherein the ratchet (11) and the latch (21) mutually rotate between:

a locking position in which the support region (22) of the latch (21) engages with a first stop region (12) of the ratchet (11);

an unlocked position in which the support region (22) of the latch (21) engages with a second stop region (13) of the ratchet; and

a release position in which the latch (21) is disengaged from the ratchet (11) to release movement of the hood shackle (4),

it is characterized in that the preparation method is characterized in that,

the ratchet wheel (11) is arranged in the peripheral direction (O) from the recess (14) ₁ ) Opposite another peripheral direction (O) from the recess (14) ₂ ) Having a radial stop arm (15) with at least one partially radial support region (16), and the latch (21) having a safety hook (25), wherein a retaining region (26) is arranged on the safety hook (25) for engagement with the support region (16) of the stop arm (15) of the ratchet (11).

2. Lock for automobile hoods according to claim 1 characterized in that in the engagement of the support area (16) of the catch arm (15) of the ratchet (11) with the retaining area (26) of the safety hook (25), the support area (16) of the catch arm (15) of the ratchet (11) extends along a normal (β) towards the centre of rotation of the latch (21) at the point of contact with the retaining area (26) of the safety hook (25).

3. Lock for a motor vehicle bonnet as claimed in claim 1 or 2, characterized in that in the engagement of the retaining region (26) of the safety hook (25) with the support region (16) of the catch arm (15) of the ratchet (11), the retaining region (26) of the safety hook (25) extends along a normal (γ) towards the centre of rotation of the latch (21) at the point of contact with the support region (16) of the catch arm (15) of the ratchet (11).

4. A lock for vehicle hoods according to claim 1 or 2 characterized in that the ratchet (11) is pivotally mounted on a first cylindrical pin (17) passing through an opening in the bottom plate (2) and the latch (21) is pivotally mounted on a second cylindrical pin (27) passing through another opening in the bottom plate (2).

5. Lock for an automobile hood according to claim 1 or 2, characterized in that the shackle (4) is releasable from a position blocked by the ratchet (11) to move in a direction of movement (a) of the shackle (4) extending between the ratchet (11) and the axis of rotation (r, z) of the latch (21), preferably symmetrically midway between the axes (r, z).

6. Lock for the bonnet of an automobile according to claim 1, characterised in that the safety hook (25) has at its free end a lug (28) for introducing a cable (29) which passes through an opening (5) in the base plate (2) of the lock (1) and an opening (6) in the cover plate (3) of the lock (1), the openings (5) in the base plate (2) and the openings (6) in the cover plate (3) being arranged opposite each other along a line (p), wherein the lug (28) is located outside the line (p) in each of the positions between the locking position and the release position of the latch (21).