Manual double-pull front cover lock

Abstract

The utility model provides a manual double-pull front cover lock which comprises an upper cover plate, the upper cover plate is matched with a lock body and a lock bottom plate to form a closed whole, a u-shaped notch is formed in the upper cover plate, and first through holes used for riveting a first installation shaft sleeve and a second installation shaft sleeve are formed in the two sides of the u-shaped notch respectively. A second through hole and a third through hole for mounting the pawl shaft and the ratchet shaft are formed below the first through hole; the ratchet shaft is sleeved with a ratchet through a ratchet lantern ring, the pawl shaft is sleeved with a pawl through a pawl lantern ring, and the ratchet is matched with a limiting hook of the pawl to lock the front cover. According to the utility model, the torsion spring is arranged inside, noise caused by resonance generated when the tension spring rebounds is avoided, the edges of the lock bottom plate and the upper cover plate are riveted with each other to form a closed whole, the internal structure is protected, the strength and durability of the lock body are enhanced, the structure is simple, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of automotive hood lock technology, specifically a manual double-pull hood lock. Background Technology

[0002] The main function of a car hood lock is to ensure that the engine hood remains closed while the vehicle is in motion, preventing accidental opening and potential safety hazards. It primarily consists of a ratchet and pawl mechanism, with locking achieved through the engagement of the ratchet and pawl. This mechanical lock structure is simple, reliable, and low-cost, and is widely used in various types of automobiles.

[0003] The current car hood locks require you to pull the release lever once from inside the driver's seat, then go to the hood and manually pull the safety hook to lift the cover, thus opening the engine hood. This operation is cumbersome and inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a manual double-pull front cover lock to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A manual double-pull front cover lock, comprising:

[0007] The upper cover plate, together with the lock body and the lock base plate, forms a closed whole. The upper cover plate is provided with a U-shaped notch. On both sides of the U-shaped notch, there are first through holes for riveting the first mounting bushing and the second mounting bushing. Below the first through holes, there are second through holes and third through holes for mounting the pawl shaft and the ratchet shaft, respectively. One end of the ratchet shaft and the pawl shaft passes through the second through holes and the third through holes and is riveted to the upper cover plate, and the other end passes through the lock body and is connected and fixed to the lock base plate by riveting.

[0008] A ratchet is fitted on the outside of the ratchet shaft via a ratchet collar, and a pawl is fitted on the outside of the pawl shaft via a pawl collar. The ratchet engages with the pawl's limiting hook to lock the front cover.

[0009] Preferably, a ratchet spring is sleeved on the outer side of the ratchet collar of the ratchet, and a second support shaft is provided on the upper end face of the ratchet spring, with the second support shaft sleeved on the top of the ratchet shaft.

[0010] Preferably, a pawl spring is sleeved on the outer side of the pawl collar of the pawl, and a first support shaft is provided on the upper end face of the pawl spring, the first support shaft being sleeved on the top end of the pawl shaft.

[0011] Preferably, a micro switch is provided inside the upper cover plate. The micro switch is fixed between the upper cover plate and the lock body by a fixing collar. The micro switch passes through the wiring harness opening on the side of the lock body and is connected to the connector and the vehicle body control wiring harness.

[0012] Preferably, the micro switch has a sensing arm on top for sensing the front cover lock status.

[0013] Preferably, a first mounting bushing and a second mounting bushing are riveted to the first through holes on both sides of the upper cover plate.

[0014] Preferably, the first mounting bushing and the second mounting bushing pass through the lock body and are riveted to the inside of the lock base plate.

[0015] Preferably, a first buffer spring is fitted on the outer side of the first mounting bushing, and a second buffer spring is fitted on the outer side of the second mounting bushing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, the edges of the lock base plate and the top cover plate are riveted together to form a closed whole. The interior is equipped with a first buffer spring, a second buffer spring, a pawl spring, and a ratchet spring, which avoids the noise generated by resonance when the tension spring rebounds, enhances the strength and durability of the lock body, and effectively protects the internal lock body and other related components from the influence of the external environment. The structure is simple and the service life is long.

[0018] In this invention, the micro switch for the hood lock is connected to a connector, and the other end of the connector is connected to the vehicle control wiring harness. When the hood lock needs to be opened, the hood can be quickly opened by simply pulling the opening handle twice from inside the driver's cab. Compared with the prior art, there is no need to move to the hood and manually pull up the safety hook to lift the hood, making it very convenient to use. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model.

[0021] Figure 3 This is a three-dimensional schematic diagram of the fully locked state of this utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the unlocked state of this utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the internal structure of this utility model.

[0024] In the diagram: 1-Lock base plate; 2-Lock body; 3-Ratchet; 4-Ratchet collar; 5-Pawl shaft; 501-Ratchet shaft; 6-Ratchet spring; 7-Pawl; 8-Pawl collar; 9-First mounting sleeve; 901-Second mounting sleeve; 10-Pawl spring; 11-First support shaft; 1101-Second support shaft; 12-First buffer spring; 1201-Second buffer spring; 13-Top cover plate; 1301-U-shaped notch; 1302-First through hole; 1303-Second through hole; 1304-Third through hole; 14-Fixing collar; 1401-Wire harness opening; 15-Micro switch; 16-Connector. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0026] Please see Figures 1 to 5 This utility model provides a technical solution:

[0027] A manual double-pull front cover lock, comprising:

[0028] The upper cover plate 13, together with the lock body 2 and the lock base plate 1, forms a closed whole. The upper cover plate 13 is provided with a U-shaped notch 1301. The two sides of the U-shaped notch 1301 are respectively provided with first through holes 1302 for riveting the first mounting bushing 9 and the second mounting bushing 901. Below the first through holes 1302, there are second through holes 1303 and third through holes 1304 for installing the pawl shaft 5 and the ratchet shaft 501. One end of the ratchet shaft 501 and the pawl shaft 5 passes through the second through holes 1303 and the third through holes 1304 respectively and is riveted to the upper cover plate 13. The other end passes through the lock body 2 and is connected and fixed to the lock base plate 1 by riveting.

[0029] The ratchet shaft 501 has a ratchet 3 sleeved on its outer side by a ratchet collar 4, and the pawl shaft 5 has a pawl 7 sleeved on its outer side by a pawl collar 8. The ratchet 3 is used to lock the front cover by cooperating with the limiting hook of the pawl 7.

[0030] In this embodiment, the ratchet spring 6, the pawl spring 10, the first buffer spring 12, and the second buffer spring 1201 are all torsion springs. When the latch of the cover lock enters the lock body 2 through the U-shaped notch 1301, it needs to overcome the restoring force of the first buffer spring 12 and the second buffer spring 1201 to drive the ratchet 3 to rotate, causing the locking teeth of the ratchet 3 to rotate and cooperate with the limiting hook of the pawl 7, thereby fixing the latch. When the latch enters the lock body 2, the latch abuts against the extension of the first buffer spring 12 and the second buffer spring 1201 located in the U-shaped notch 1301, providing the latch with a restoring force in the opposite direction, effectively reducing the noise generated by the impact. At the same time, when unlocking, the ratchet 3 and the pawl 7 are reset by the ratchet spring 6 and the pawl spring 10 sleeved on the outside, which avoids the noise generated by resonance when the traditional tension spring rebounds.

[0031] Specifically, a ratchet spring 6 is sleeved on the outer side of the ratchet collar 4 of the ratchet 3, and a second support shaft 1101 is provided on the upper end face of the ratchet spring 6. The second support shaft 1101 is sleeved on the top end of the ratchet shaft 501.

[0032] Specifically, a pawl spring 10 is sleeved on the outer side of the pawl collar 8 of the pawl 7, and a first support shaft 11 is provided on the upper end face of the pawl spring 10. The first support shaft 11 is sleeved on the top end of the pawl shaft 5.

[0033] In this embodiment, the edges of the lock base plate 1 and the upper cover plate 13 are riveted together to form a closed whole, which encloses the internal lock body 2, the first buffer spring 12 and the second buffer spring 1201, the pawl spring 10 and the ratchet spring 6, thereby enhancing the strength and durability of the lock body and effectively protecting the internal lock body 2 and other related components from the influence of the external environment, such as the intrusion of dust, moisture and other impurities.

[0034] Specifically, a first mounting bushing 9 and a second mounting bushing 901 are riveted to the first through holes 1302 on both sides of the upper cover plate 13.

[0035] Specifically, the first mounting bushing 9 and the second mounting bushing 901 pass through the lock body 2 and are riveted to the inside of the lock base plate 1.

[0036] Specifically, a first buffer spring 12 is sleeved on the outer side of the first mounting bushing 9, and a second buffer spring 1201 is sleeved on the outer side of the second mounting bushing 901.

[0037] In this embodiment, the vehicle body control wiring harness is connected to the connector. When the hood needs to be opened, the user only needs to pull the opening handle in the driver's cab to make the ratchet 3 and pawl 7 rotate and unlock. Pulling the handle twice will open the hood.

[0038] In this embodiment, the ratchet 3 and pawl 7 inside the lock body 2 are provided with a double-pull structure. The ratchet 3 has two engaging teeth. Different engaging teeth can engage with the pawl 7 to enable the front cover lock to achieve unlocked, half-locked, and fully locked states (e.g., ...). Figure 3 , 4 When the latch of the hood lock enters the lock body 2 through the U-shaped notch 1301, it needs to overcome the restoring force of the first buffer spring 12 and the second buffer spring 1201 to drive the ratchet 3 to rotate and make the locking teeth of the ratchet 3 rotate. If the force of closing the hood is not enough to overcome the spring force of the torsion spring, the latch enters the U-shaped notch 1301 but is not locked. At this time, it is in a half-locked state. When the car door is in a half-locked or unlocked state, an alarm needs to be triggered for the safety of the car owner.

[0039] A micro switch 15 is installed inside the lock body 2. The sensing arm of the micro switch 15 contacts the outer edge of the ratchet 3. When the ratchet 3 rotates to different positions, it applies different pressures to the sensing arm. Thus, the status of the hood lock can be determined based on the signal from the micro switch 15. If it is in a half-locked or unlocked state, an alarm will be issued.

[0040] Specifically, a micro switch 15 is provided inside the upper cover plate 13. The micro switch 15 is fixed between the upper cover plate 13 and the lock body 2 by a fixing collar 14. The micro switch 15 passes through the wiring harness opening 1401 on the side of the lock body 2 and connects to the connector 16 and the vehicle body control wiring harness.

[0041] Specifically, the micro switch 15 has a sensing arm on its top for sensing the front cover lock status.

[0042] When using this invention, the front cover needs to be closed forcefully so that the front cover lock latch overcomes the elastic force of the first buffer spring 12 and the second buffer spring 1201 inside the front cover lock latch, driving the ratchet 3 to rotate and engage with the pawl 7 to complete the front cover lock. Under the action of the first buffer spring 12 and the second buffer spring 1201, the noise generated by the impact is effectively reduced, and the noise generated by the resonance when the tension spring rebounds is avoided. When the force is insufficient, the front cover lock will enter a half-lock state. At this time, the sensing arm of the micro switch 15 transmits a signal to the car system to issue an alarm prompt.

[0043] Meanwhile, the hood lock micro switch 15 is connected to the connector, and the other end of the connector is connected to the vehicle body control wiring harness. When the hood lock needs to be opened, the hood can be quickly opened by simply pulling the opening handle twice in the driver's cab.

[0044] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manual double-pull front cover lock, characterized in that, include: The upper cover plate (13) is formed in conjunction with the lock body (2) and the lock base plate (1) to form a closed whole. The upper cover plate (13) is provided with a U-shaped notch (1301). The two sides of the U-shaped notch (1301) are respectively provided with a first through hole (1302) for riveting the first mounting bushing (9) and the second mounting bushing (901). Below the first through hole (1302) are a second through hole (1303) and a third through hole (1304) for installing the pawl shaft (5) and the ratchet shaft (501). One end of the ratchet shaft (501) and the pawl shaft (5) passes through the second through hole (1303) and the third through hole (1304) respectively and is riveted to the upper cover plate (13). The other end passes through the lock body (2) and is connected and fixed to the lock base plate (1) by riveting. The ratchet shaft (501) is fitted with a ratchet (3) through a ratchet collar (4) on the outside, and the pawl shaft (5) is fitted with a pawl (7) through a pawl collar (8) on the outside. The ratchet (3) is used to lock the front cover by cooperating with the limiting hook of the pawl (7).

2. The manual double-pull front cover lock according to claim 1, characterized in that: The ratchet (3) has a ratchet spring (6) sleeved on the outside of the ratchet collar (4), and a second support shaft (1101) is provided on the upper end face of the ratchet spring (6). The second support shaft (1101) is sleeved on the top of the ratchet shaft (501).

3. A manual double-pull front cover lock according to claim 1, characterized in that: A pawl spring (10) is fitted on the outside of the pawl collar (8) of the pawl (7), and a first support shaft (11) is provided on the upper end face of the pawl spring (10). The first support shaft (11) is fitted on the top of the pawl shaft (5).

4. A manual double-pull front cover lock according to claim 1, characterized in that: A micro switch (15) is provided inside the upper cover plate (13). The micro switch (15) is fixed between the upper cover plate (13) and the lock body (2) by a fixing collar (14). The micro switch (15) passes through the wiring harness opening (1401) on the side of the lock body (2) and connects to the connector (16) and the vehicle body control wiring harness.

5. A manual double-pull front cover lock according to claim 4, characterized in that: The micro switch (15) has a sensing arm on its top for sensing the front cover lock status.

6. A manual double-pull front cover lock according to claim 1, characterized in that: The first mounting bushing (9) and the second mounting bushing (901) are respectively riveted to the first through hole (1302) on both sides of the upper cover plate (13).

7. A manual double-pull front cover lock according to claim 6, characterized in that: The first mounting bushing (9) and the second mounting bushing (901) pass through the lock body (2) and are riveted to the inside of the lock base plate (1).

8. A manual double-pull front cover lock according to claim 6, characterized in that: The first mounting bushing (9) is fitted with a first buffer spring (12) on its outer side, and the second mounting bushing (901) is fitted with a second buffer spring (1201) on its outer side.

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