Safety hook structure of an engine hood lock

Abstract

The application discloses a safety hook structure of an engine hood lock, which comprises a base, a hook body, a first elastic member and a second elastic member, wherein the base is detachably fixed on a vehicle body; the hook body comprises a mounting part, a limiting part, a handle part and a hooking part, the lower end of the mounting part is rotatably mounted on the base, the limiting part is fixed on one end of the mounting part, the handle part is fixed on the other end of the mounting part, the hooking part is arranged between the limiting part and the handle part and is close to the limiting part, and the lower end of the hooking part is rotatably mounted on the mounting part; and the two ends of the first elastic member are fixedly connected with the base and the mounting part respectively. The safety hook allows the engine hood to be lifted to a larger height without increasing the arrangement space of the safety hook after the unlocking of the primary lock, thereby meeting the requirement of the operator to stretch the hand into the handle part.

Description

Technical Field

[0001] This invention relates to the field of engine hood lock technology, and more particularly to a safety hook structure for an engine hood lock. Background Technology

[0002] Most car hoods are located at the front of the vehicle. To ensure driving safety, regulations require that this type of hood be equipped with a two-stage locking mechanism. There are generally two solutions for hood locks: one is to integrate the primary lock and the secondary lock (safety hook) into one assembly, and the other is to have the primary lock and the secondary lock (safety hook) as separate assemblies.

[0003] Currently, engine hood locks (such as the engine hood device and vehicle disclosed in application number 201810812829.X) generally use a primary lock and a secondary lock (safety hook) as separate assemblies. The function of the safety hook is to keep the lock hooked after the primary lock is opened, so that the engine hood will not be fully opened and affect driving safety. The safety hook is opened after the primary lock is unlocked, the engine hood is slightly raised, and the operator can reach in through the gap between the engine hood cover and the front of the engine compartment to operate.

[0004] The existing relationship between the engine hood and the safety hook arrangement is as follows: Figure 1 and Figure 2As shown, the engine hood 1 includes a cover 11 and a latch 12. The latch 12 is fixed to the inner top surface of the cover 11. The safety hook 2 includes a base 21, a hook body 22, and a torsion spring 23. The base 21 is detachably fixed to the vehicle body. The hook body 22 includes a mounting part 221, a handle part 222, and a hooking part 223. The lower end of the mounting part 221 is rotatably mounted on the base 21. The handle part 222 is fixed to one end of the mounting part 221. The lower end of the hooking part 223 is fixed to the other end of the mounting part 221. The two ends of the torsion spring 23 are fixedly connected to the base 21 and the mounting part 221 respectively, so that the lower surface of the handle part 222 abuts against the upper surface of the base 21 and the upper end of the hooking part 223 hooks the latch 12. After the hood is closed, a certain safety distance h1 remains between the safety hook and the inner top surface of the hood. This prevents damage from a collision between the inner top surface of the hood and the safety hook after the hood is closed. After the primary lock is unlocked, the hood will spring up to a certain height h2. The height at which the hood springs up must be sufficient to allow the operator to reach into the safety hook handle. Some vehicle models, due to their design and hood layout, use conventional safety hooks. Because the safety hook is incompressible, and the height of the hood springs up is limited by the height of the safety hook, which in turn is limited by the hood itself, the height of the gap h2 after the hood springs up is insufficient to allow the operator to reach into the safety hook handle, thus hindering the opening of the hood. Therefore, there is an urgent need for a hood lock that, after the primary lock is unlocked, allows the safety hook to lift the hood to a greater height, thus satisfying the operator's need to reach into the safety hook handle. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a safety hook structure for engine hood locks. This solves the technical problem that in some existing models, due to the influence of styling and engine hood arrangement, the use of conventional safety hooks results in a limited lifting height of the engine hood. After the engine hood pops up, the gap height is insufficient to allow a hand to reach in, thus making it impossible to operate the safety hook handle and affecting the opening of the engine hood.

[0006] To achieve the above technical objectives, the present invention provides a safety hook structure for an engine hood lock, comprising:

[0007] The base is used to detachably fix it to the vehicle body;

[0008] The hook body includes an installation part, a limiting part, a handle part, and a hooking part. The lower end of the installation part is rotatably mounted on the base. The limiting part is fixed to one end of the installation part. The handle part is fixed to the other end of the installation part. The hooking part is disposed between the limiting part and the handle part and is close to the limiting part. The lower end of the hooking part is rotatably mounted on the installation part.

[0009] The first elastic element has its two ends fixedly connected to the base and the mounting part, respectively, so that the lower surface of the handle part abuts against the upper surface of the base;

[0010] The second elastic element has its two ends fixedly connected to the mounting part and the hooking part, respectively, so that the hooking part abuts against the limiting part and the upper end of the hooking part hooks the lock.

[0011] Furthermore, the base includes a main board and two side plates. The two side plates are positioned opposite each other and spaced apart on one side of the main board. One end of each side plate is fixed to the main board. The mounting part is disposed between the two side plates, and the lower end of the mounting part is rotatably mounted on the main board. The two side plates are detachably fixed to the vehicle body.

[0012] Furthermore, the base also includes a first pivot pin, which is disposed between the two side plates and perpendicular to the main board. One end of the first pivot pin is fixed to the main board, and the lower end of the mounting part is rotatably sleeved on the first pivot pin.

[0013] Furthermore, the first elastic element is a first torsion spring, which is sleeved on the first shaft pin. One end of the first torsion spring is fixedly connected to the side plate, and the other end of the first torsion spring is fixedly connected to the lower end of the mounting part.

[0014] Furthermore, the mounting portion has a notch for inserting the latch.

[0015] Furthermore, the limiting part is fixed to the top of the mounting part and located on one side of the notch, and the limiting part corresponds to one of the side plates.

[0016] Furthermore, the hook body also includes a second pivot pin, which is disposed between the limiting part and the handle part and is close to the limiting part. The second pivot pin is parallel to the first pivot pin and is fixedly passed through the upper end of the mounting part. The lower end of the hooking part is rotatably mounted on the second pivot pin.

[0017] Furthermore, the second elastic element is a second torsion spring, which is sleeved on the second shaft pin. One end of the second torsion spring is fixedly connected to the limiting part, and the other end of the second torsion spring is fixedly connected to the lower end of the hook part.

[0018] Furthermore, the handle portion corresponds to another side plate, with the lower surface of the handle portion abutting against the upper surface of the other side plate.

[0019] Furthermore, the hook head of the hook portion faces the notch, and the contact point between the hook head of the hook portion and the cover is located directly above the notch.

[0020] Compared with the prior art, the beneficial effects of the present invention include: when closing the engine hood, as the latch falls, the hood abuts against the upper end of the hook and gradually presses the hook downward, causing the hook to rotate towards the handle until the hood reaches the closed position. The primary lock locks the hood. At this time, the second elastic member is stretched due to the tension of the hook. When the primary lock is unlocked, the hood opens, and the second elastic member pulls the hook back to its initial state. At this time, the hook abuts against the limiting part, and the upper end of the hook hooks the latch. The operator can reach into the operating handle through the gap between the hood and the front of the engine compartment, causing the handle to rotate away from the initial position of the handle, thereby allowing the upper end of the hook to leave the latch, releasing the latch and allowing the hood to open completely. After the primary lock is unlocked, this safety hook allows the engine hood to be raised to a greater height without increasing its placement space, thus meeting the operator's need to reach into the operating handle. Attached Figure Description

[0021] Figure 1 This is a structural diagram showing the existing arrangement of the safety hook and the engine hood;

[0022] Figure 2 yes Figure 1 A structural schematic diagram of the existing safety hooks and engine hood arrangement from another perspective;

[0023] Figure 3 This is a three-dimensional structural diagram of a safety hook structure for an engine hood lock provided by the present invention;

[0024] Figure 4 yes Figure 3 A schematic diagram of the safety hook structure of an engine hood lock when the hood is closed;

[0025] Figure 5 yes Figure 4 A schematic diagram of the safety hook structure of an engine hood lock when the hooking part engages with the latch and the hood is opened;

[0026] In the diagram: 1 - Engine hood, 11 - Cover, 12 - Buckle, 2 - Safety hook, 21 - Base, 22 - Hook body, 221 - Mounting part, 222 - Handle part, 223 - Hooking part, 23 - Torsion spring, 100 - Base, 110 - Main board, 120 - Side plate, 130 - First axle pin, 200 - Hook body, 210 - Mounting part, 211 - Notch, 220 - Limiting part, 230 - Handle part, 240 - Hooking part, 250 - Second axle pin, 300 - First elastic element, 400 - Second elastic element. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] This invention provides a safety hook structure for an engine hood lock, the structure of which is as follows: Figure 3 - Figure 5 As shown, the device includes a base 100, a hook 200, a first elastic element 300, and a second elastic element 400. The base 100 is detachably fixed to the vehicle body. The hook 200 includes a mounting part 210, a limiting part 220, a handle part 230, and a hooking part 240. The lower end of the mounting part 210 is rotatably mounted on the base 100. The limiting part 220 is fixed to one end of the mounting part 210, and the handle part 230 is fixed to the other end of the mounting part 210. The hooking part 240 is disposed between the limiting part 220 and the handle part 230. Between 30 and close to the limiting part 220, the lower end of the hook part 240 is rotatably mounted on the mounting part 210; the two ends of the first elastic member 300 are fixedly connected to the base 100 and the mounting part 210 respectively, so that the lower surface of the handle part 230 abuts against the upper surface of the base 100; the two ends of the second elastic member 400 are fixedly connected to the mounting part 210 and the hook part 240 respectively, so that the hook part 240 abuts against the limiting part 220 and the upper end of the hook part 240 hooks the buckle 12.

[0029] In use, the base 100 of this safety hook is detachably fixed to the vehicle body. When arranging the latch 12, the latch 12 should be located between the limiting part 220 and the handle part 230, and closer to the handle part 230. When closing the engine hood 1, the latch 12 first contacts the hook body 200. The latch 12 applies a component force to the hook body 200 extending away from the handle part 230, thereby pushing the hook body 200 open in that direction, allowing the latch 12 to fall. During the falling process, the cover 11 abuts against the upper end of the hooking part 240 and gradually presses the hooking part 240 downward, causing the hooking part 240 to rotate towards the handle part 230 until the cover 11 reaches the closed position. The primary lock locks the cover 11, keeping it in the closed state. At this time, the second elastic member 400 due to Under the pulling force of the hook 240, the second elastic element 400 is in a stretched state. When the primary lock is unlocked, the cover 11 is opened, and the second elastic element 400 pulls the hook 240 back to its initial state. At this time, the hook 240 abuts against the limiting part 220, and the upper end of the hook 240 hooks the latch 12. The operator can reach in through the gap between the cover 11 and the front of the engine compartment to operate the handle 230, so that the handle 230 drives the mounting part 210 to rotate away from the initial position of the handle 230, thereby allowing the upper end of the hook 240 to leave the latch 12, releasing the latch 12, and allowing the cover 11 to open completely. After the primary lock is unlocked, this safety hook allows the engine cover 1 to be raised to a greater height without increasing its placement space, thereby meeting the operator's need to reach in and operate the handle 230.

[0030] As a preferred embodiment, please refer to Figure 3 and Figure 4The base 100 includes a main board 110 and two side plates 120. The two side plates 120 are positioned opposite each other and spaced apart on one side of the main board 110. One end of each side plate 120 is fixed to the main board 110. The mounting part 210 is disposed between the two side plates 120. The lower end of the mounting part 210 is rotatably mounted on the main board 110. The two side plates 120 are detachably fixed to the vehicle body so that the lower surface of the handle part 230 abuts against the top of the corresponding side plate 120 under the action of the first elastic member 300. This prevents the hook 200 from rotating toward the initial position of the handle part 230. During the process of the engine hood 1 falling, the cover 11 will press down on the hook part 240, allowing the hook part 240 to rotate toward the handle part 230. The hook part 240 is compressed and folded, while the mounting part 210 does not move.

[0031] As a preferred embodiment, please refer to Figure 3 and Figure 4 The base 100 further includes a first axle pin 130, which is disposed between the two side plates 120 and perpendicular to the main board 110. One end of the first axle pin 130 is fixed to the main board 110. The lower end of the mounting part 210 is rotatably sleeved on the first axle pin 130, so that the lower end of the mounting part 210 can rotate relative to the first axle pin 130, and so that the first elastic member 300 can be arranged on the first axle pin 130.

[0032] As a preferred embodiment, please refer to Figure 3 and Figure 4 The first elastic element 300 is a first torsion spring, which is sleeved on the first shaft pin 130. One end of the first torsion spring is fixedly connected to the side plate 120, and the other end of the first torsion spring is fixedly connected to the lower end of the mounting part 210. This allows the first torsion spring to reset the mounting part 210, so that under the action of the first torsion spring, the lower surface of the handle part 230 can abut against the top of the corresponding side plate 120, thereby limiting the position of the handle part 230.

[0033] As a preferred embodiment, please refer to Figure 4 and Figure 5The mounting part 210 has a notch 211 for inserting the latch 12. When the engine cover 1 is closed, it will first contact the hook 200 during the downward movement. The latch 12 will apply a component force to the hook 200 in a direction away from the handle part 230, pushing the hook 200 in that direction so that the latch 12 can fall and insert into the notch 211, so that the cover 11 reaches the closed position.

[0034] As a preferred embodiment, please refer to Figure 4 and Figure 5 The limiting part 220 is fixed to the top of the mounting part 210 and located on one side of the notch 211. The limiting part 220 corresponds to one of the side plates 120, so that the hook part 240 abuts against the limiting part 220 under the action of the second elastic member 400, and the hook part 240 is kept in this state, so that when the cover 11 is closed, the safety hook can be kept in the set posture and in contact with the cover 11.

[0035] As a preferred embodiment, please refer to Figure 3 and Figure 4 The hook body 200 further includes a second axle pin 250, which is disposed between the limiting part 220 and the handle part 230 and close to the limiting part 220. The second axle pin 250 is parallel to the first axle pin 130 and is fixedly passed through the upper end of the mounting part 210. The lower end of the hooking part 240 is rotatably mounted on the second axle pin 250, so that the lower end of the hooking part 240 can rotate relative to the second axle pin 250, and so that the second elastic member 400 can be arranged on the second axle pin 250.

[0036] As a preferred embodiment, please refer to Figure 3 and Figure 4The second elastic element 400 is a second torsion spring, which is sleeved on the second shaft pin 250. One end of the second torsion spring is fixedly connected to the limiting part 220, and the other end of the second torsion spring is fixedly connected to the lower end of the hook part 240. Under the action of the second torsion spring, the hook part 240 presses against the limiting part 220 and keeps the hook part 240 in this state. Thus, when the cover 11 is closed, the safety hook can maintain a set posture in contact with the cover 11 and gradually press the hook part 240 downward, so that the hook part 240 rotates towards the handle part 230 until the cover 11 reaches the closed position. The hook part 240 is compressed and folded. When the cover 11 is lifted, the hook part 240 springs up, increasing the travel space of the latch 12, so that the cover 11 can be lifted to a greater height, increasing the space for hand insertion to meet the operation requirements.

[0037] As a preferred embodiment, please refer to Figure 4 and Figure 5 The handle portion 230 corresponds to another side plate 120, and the lower surface of the handle portion 230 abuts against the upper surface of the other side plate 120, so that the corresponding side plate 120 can limit the handle portion 230.

[0038] As a preferred embodiment, please refer to Figure 4 and Figure 5 The hook head of the hooking part 240 faces the notch 211, and the contact point between the hook head of the hooking part 240 and the cover 11 is located directly above the notch 211. The mounting part 210 is restricted by the base 100 from rotating toward the handle part 230. When the cover 11 is closed, the contact position with the hook body 200 is located directly above the notch 211. At this time, the torque borne by this safety hook is in the direction close to the handle part 230, but the rotation of the mounting part 210 toward the handle part 230 is restricted by the base 100. Only the hooking part 240 can be compressed and folded.

[0039] To better understand this invention, the following is combined with... Figure 1 - Figure 5 The working principle of the technical solution of the present invention will be described in detail below:

[0040] In use, the two side plates 120 of this safety hook are detachably fixed to the vehicle body. When arranging the latch 12, the latch 12 should be located above the notch 211 and close to the handle portion 230. The lower surface of the handle portion 230 abuts against the top of the corresponding side plate 120 under the action of the first torsion spring. When closing the engine hood 1, the latch 12 first contacts the hook body 200, and the latch 12 applies a force along the hook body 200. The force extending away from the handle portion 230 pushes the hook body 200 in that direction, allowing the latch 12 to fall and insert into the notch 211. As the latch 12 falls, the cover 11 abuts against the upper end of the hook portion 240 and gradually presses it downwards, causing the hook portion 240 to rotate towards the handle portion 230 until the cover 11 reaches the closed position, at which point the primary lock secures the cover 11. The cover 11 is kept closed. At this time, the second torsion spring is stretched due to the tension of the hook part 240. When the first-level lock is unlocked, the cover 11 is opened, and the second torsion spring pulls the hook part 240 back to its initial state. At this time, the hook part 240 presses against the limiting part 220, and the hook head of the hook part 240 hooks the lock 12. The operator can reach in through the gap between the cover 11 and the front of the engine compartment to operate the handle part 230, so that the handle part 230 drives the mounting part 210 to rotate away from the initial position of the handle part 230, thereby allowing the upper end of the hook part 240 to leave the lock 12, releasing the hook from the lock 12, and allowing the cover 11 to open completely. After the first-level lock is unlocked, this safety hook can increase the lifting height of the engine cover 1 without increasing its arrangement space, thereby meeting the operator's need to reach in to operate the handle part 230.

[0041] The safety hook structure for an engine hood lock provided by this invention has the following beneficial effects:

[0042] (1) The lower surface of the handle portion 230 abuts against the top of the corresponding side plate 120 under the action of the first elastic member 300, thereby preventing the hook body 200 from rotating toward the initial position of the handle portion 230. This makes it easier for the cover 11 to press down on the hook portion 240 during the process of the engine cover 1 falling, so that the hook portion 240 can rotate toward the handle portion 230. The hook portion 240 is compressed and folded, while the mounting portion 210 does not move.

[0043] (2) Regarding the problem that the lifting height of the engine hood 1 is insufficient after it is lifted, another solution is to increase the length of the latch 12 and move the safety hook assembly downward to increase the height of the hook body 200. However, this solution requires increasing the arrangement space of the safety hook. Since the space inside the engine compartment is generally compact, this solution is difficult to arrange. However, the hooking part 240 of this safety hook can allow the cover 11 to pop up to a greater height without increasing the arrangement space, which can solve this problem better.

[0044] (3) After the first-level lock is unlocked, this safety hook allows the engine hood 1 to be raised to a greater height without increasing its arrangement space, thereby meeting the operator's need to reach into the handle 230 to operate.

[0045] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A safety hook structure for an engine hood lock, characterized in that, include: The base is used to detachably fix it to the vehicle body; The hook body includes an installation part, a limiting part, a handle part, and a hooking part. The lower end of the installation part is rotatably mounted on the base. The limiting part is fixed to one end of the installation part. The handle part is fixed to the other end of the installation part. The hooking part is disposed between the limiting part and the handle part and is close to the limiting part. The lower end of the hooking part is rotatably mounted on the installation part. The first elastic element has its two ends fixedly connected to the base and the mounting part, respectively, so that the lower surface of the handle part abuts against the upper surface of the base; The second elastic element has its two ends fixedly connected to the mounting part and the hooking part respectively, so that the hooking part abuts against the limiting part and the upper end of the hooking part hooks the lock. The base includes a main board and two side plates. The two side plates are positioned opposite each other and spaced apart on one side of the main board. One end of each side plate is fixed to the main board. The mounting part is located between the two side plates. The lower end of the mounting part is rotatably mounted on the main board. The two side plates are detachably fixed to the vehicle body. The limiting part corresponds to one of the side plates, the handle part corresponds to the other side plate, and the lower surface of the handle part abuts against the upper surface of the other side plate; During the hood's descent, the cover presses down on the hook, allowing the hook to rotate towards the handle. The hook can be compressed and folded to allow the hood to be raised to a greater height. Furthermore, when the primary lock is unlocked, the cover opens, and the second elastic element pulls the hook part back to its initial state. The hook part abuts against the limiting part, and the upper end of the hook part hooks the lock. The operator operates the handle part, which drives the mounting part to rotate away from the initial position of the handle part, causing the upper end of the hook part to leave the lock and release the hook from the lock, thus fully opening the cover.

2. The safety hook structure of the engine hood lock according to claim 1, characterized in that, The base also includes a first pivot pin, which is disposed between the two side plates and perpendicular to the main board. One end of the first pivot pin is fixed to the main board, and the lower end of the mounting part is rotatably sleeved on the first pivot pin.

3. The safety hook structure of the engine hood lock according to claim 2, characterized in that, The first elastic element is a first torsion spring, which is sleeved on the first shaft pin. One end of the first torsion spring is fixedly connected to the side plate, and the other end of the first torsion spring is fixedly connected to the lower end of the mounting part.

4. The safety hook structure of the engine hood lock according to claim 3, characterized in that, The mounting section has a notch for inserting the latch.

5. The safety hook structure of the engine hood lock according to claim 4, characterized in that, The limiting part is fixed to the top of the mounting part and located on one side of the notch.

6. The safety hook structure of the engine hood lock according to claim 5, characterized in that, The hook body also includes a second axle pin, which is disposed between the limiting part and the handle part and is close to the limiting part. The second axle pin is parallel to the first axle pin and is fixedly passed through the upper end of the mounting part. The lower end of the hooking part is rotatably mounted on the second axle pin.

7. The safety hook structure of the engine hood lock according to claim 6, characterized in that, The second elastic element is a second torsion spring, which is sleeved on the second shaft pin. One end of the second torsion spring is fixedly connected to the limiting part, and the other end of the second torsion spring is fixedly connected to the lower end of the hook part.

8. The safety hook structure of the engine hood lock according to claim 7, characterized in that, The hook head of the hooking part faces the notch, and the contact point between the hook head of the hooking part and the cover is located directly above the notch.

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