Vehicle double-pull cover lock and control method thereof

Abstract

The invention discloses a vehicle double-pull-cover lock and a control method thereof.The vehicle double-pull-cover lock comprises a shell, a lock catch groove, a clamping plate assembly, a clamping jaw assembly and a lock catch, a clamping plate stopping part, a clamping plate groove, a full-lock meshing part and a half-lock meshing part are arranged on a clamping plate, a clamping jaw locking part is arranged at one end of a clamping jaw, and a pull triggering part is arranged at the other end of the clamping jaw; a clamping jaw stop part is arranged at one end close to the pulling trigger part; the clamping jaw locking part is meshed with the full-locking meshing part in a full-locking state, and the clamping jaw locking part is meshed with the semi-locking meshing part in a semi-locking state; and the clamping jaw stop part is matched with the clamping plate stop part. The vehicle double-pull cover lock has the functions of full locking, half locking and unlocking, the functions of the three states can be achieved through pulling deflection of the clamping jaws, operation is easy and smooth, and stability is high; and the whole structure is compact, the occupied space is small, no obvious protrusion exists outside the shell, additional mechanisms are few, and loading matching is hidden.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle locks, and in particular to a vehicle double-hood lock and a control method thereof. Background Art

[0002] The vehicle hood lock is a locking device specially designed for vehicles. The mounting hole of the existing hood lock is coaxial with the mounting hole of the card plate and the card claw, and a longer screw is required. The adjustment space of the mounting hole is limited. Moreover, most of the card plates and the card claws are located on the upper side of the lock body, and the protrusions are obvious. After the vehicle hood is opened, it is easy for people to touch it, which may cause the card plate to be moved by mistake or scratch objects or clothes.

[0003] In addition, the existing hood lock needs to be equipped with a separate ejection mechanism, which makes the lock body space larger and the protrusion obvious. When new energy vehicles are equipped with a front trunk, it is easy to hinder the entry of items. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle double hood lock and a control method thereof in view of the problems existing in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A vehicle double hood lock, comprising a housing, a lock catch slot being provided on the housing, a clamping plate assembly and a claw assembly being provided on both sides of the lock catch slot, for controlling the lock catch in the lock catch slot to be locked and unlocked; the clamping plate assembly comprising a rotatable clamping plate, a clamping plate buckle being provided on the clamping plate, and a clamping plate stopper being away from the clamping plate buckle, the clamping plate buckle comprising a clamping plate slot for accommodating the lock catch, and a full locking meshing portion and a half locking meshing portion located on both sides of the clamping plate slot; The claw assembly includes a rotatable claw, one end of the claw is provided with a claw locking portion, the other end is provided with a pull trigger portion, and the end close to the pull trigger portion is provided with a claw stopping portion; the claw locking portion is engaged with the fully locked meshing portion in a fully locked state, and the claw locking portion is engaged with the semi-locked meshing portion in a semi-locked state; the claw stopping portion and the card plate stopping portion cooperate with each other multiple times during the fully locked, semi-locked and unlocked processes.

[0006] The vehicle double hood lock improves the structure and connection and installation method of the shell, the card plate assembly and the claw assembly so that it has full locking (primary locking), half locking (secondary locking) and unlocking functions. The functions of the three states can be achieved by pulling and deflecting the claws. The operation is simple and smooth with high stability. Moreover, the overall structure is compact, the space occupied is small, there are no obvious protrusions outside the shell, there are fewer additional mechanisms, the loading and matching is relatively concealed, and it is not easy to obstruct or scratch objects.

[0007] The claw assembly and the card plate assembly are both installed within the range enclosed by the shell and can rotate relative to each other so that the claw and the card plate can engage or stop at multiple positions, allowing the lock to move along the lock slot under the control of the card plate slot, thereby realizing multi-level locking and unlocking functions.

[0008] Furthermore, the shell includes a shell back plate, the locking groove is arranged on the shell back plate, the edge of the shell back plate on the side where the card plate assembly is located is provided with a first side edging, the edge of the shell back plate on the side where the claw assembly is located is provided with a second side edging, the first side edging and the second side edging form a semi-enclosed structure of the shell, and the card plate and the claw move in the area between the first side edging and the second side edging.

[0009] The shell of this structure is convenient for connecting and installing functional parts such as the card plate assembly and the claw assembly, and can also wrap the functional parts in a semi-enclosed manner. After being assembled with the front-end module, these functional parts will be enclosed therein.

[0010] Furthermore, a connecting hole is provided on the first side edge, a limiting protrusion is provided between the upper side of the first side edge and the shell back plate, and a clearance hole is provided between the lower side and the shell back plate; a limiting connecting groove is provided on the upper side of the second side edge.

[0011] Furthermore, the card plate assembly also includes a card plate rivet shaft, and a card plate torsion spring mounted on the card plate rivet shaft, the end of the card plate rivet shaft is provided with a first connecting shaft, the first connecting shaft passes through the card plate and is connected to the shell; the card plate is provided with a card plate torsion spring hanging arm on one side close to the card plate stop portion, one end of the card plate torsion spring is clamped at the card plate torsion spring hanging arm, and the other end is connected to the side edge of one side of the shell.

[0012] Furthermore, the fully locked meshing portion and the semi-locked meshing portion are respectively provided with upturned meshing teeth, the outer surface of the meshing teeth is an arc surface, and a turning point is provided at the root of the meshing teeth. There is a diameter difference of not less than 3.5 mm between the contour circle swept by the outer surface of the meshing teeth and the contour circle swept by the root of the teeth; the end of the clamping plate stop portion does not exceed the range of the contour circle swept by the outer surface of the meshing teeth.

[0013] Furthermore, the claw assembly also includes a claw rivet shaft and a claw torsion spring, one end of the claw rivet shaft is provided with a second connecting shaft, the second connecting shaft passes through the claw at a position slightly above the middle of the claw and is connected to the shell, and the claw is provided with a claw torsion spring hanging arm on the edge of the side away from the claw stop portion, one end of the claw torsion spring is connected to the claw torsion spring hanging arm, and the other end is connected to the side edge on the other side of the shell.

[0014] Furthermore, the claw locking portion is a hook-shaped portion that is arranged at the upper end of the claw and is obliquely buckled downward, and the pulling trigger portion is a pulling connecting arm that is arranged at the lower end of the claw; when the pulling connecting arm is deflected to an extreme position away from the card plate, the claw locking portion approaches the card plate and engages with the full-locking engaging portion, or engages with the half-locking engaging portion, or is in an unlocked state; when the pulling connecting arm is deflected to an extreme position close to the card plate, the claw stopping portion engages with the card plate stopping portion.

[0015] Furthermore, a micro switch is provided on the housing, and the micro switch is arranged at a lower position where the card plate rotates, and a trigger sheet of the micro switch contacts an outer peripheral surface of the card plate away from the full-locking engagement portion.

[0016] Furthermore, a bracket is provided on a side of the shell away from the locking groove, and the bracket is connected to a pulling member, and one end of the pulling member is connected to the pulling trigger part.

[0017] A control method for a vehicle double hood lock, the control method comprising the following steps: When the vehicle double hood lock is in a fully locked state, the lock buckle is located inside the lock buckle groove, the claw locking portion is connected to the fully locked meshing portion, and the pull trigger portion is in an extreme position away from the card plate; The pull trigger part is pulled, and the pull trigger part approaches the extreme position close to the card plate, the claw locking part and the full locking meshing part are gradually separated, the half locking meshing part moves toward the claw locking part, and the card plate stop part moves toward the claw stop part; when the pull trigger part is in the extreme position close to the card plate, the card plate stop part abuts against an interface of the claw stop part and is in the stop position; The pulling trigger portion is released, the claw returns to its original position, the claw stop portion is separated from the card plate stop portion, the claw locking portion is connected to the rotated half-locking engagement portion, and the lock is in the middle position of the lock slot; Pull the pull trigger part again, the pull trigger part returns to the extreme position close to the card plate, the card plate rotates, and the claw locking part is separated from the semi-locking engagement part; release the pull trigger part again, the claw returns to the original position again, the full-locking engagement part and the semi-locking engagement part are both away from the claw locking part, the card plate stopping part is separated from the claw stopping part, and the lock is at the opening of the lock groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The double hood lock of the vehicle has the functions of full locking, half locking and unlocking by improving the structure and connection and installation method of the shell, the card plate assembly and the claw assembly. The functions of the three states can be realized by pulling and deflecting the claws, which is simple and smooth to operate and has high stability; and the overall structure is compact, occupies less space, has no obvious protrusions outside the shell, has fewer additional mechanisms, and is more concealed in vehicle installation; 2. All locking and unlocking actions can be completed by the cooperation of the claw assembly, the card plate assembly and the shell, without the need to equip more secondary mechanisms and opening and closing mechanisms. The mechanism makes the hood lock have fewer parts and lighter weight. The installation hole distance of the hood lock can control the hood to 110-120mm, and the installation space can be controlled within 140*90*28mm; 3. The first side edging and the second side edging on the shell body can not only form the surrounding, but also connect the card plate assembly and the claw assembly, and limit the card plate assembly and the claw assembly, and also can utilize the connecting installation holes thereon to assemble with the front-end module to form a closed hood lock; 4. The double-pull hood lock of the vehicle is controlled by the above-mentioned structure and operation method, so the required operating force is small, the static strength is high, and the durability of frequent opening and closing is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the internal structure of a vehicle double hood lock according to the present invention; Figure 2 This is a front view of the internal structure of a double draw hood lock for a vehicle according to the present invention; Figure 3 It is a schematic diagram of the upper part of the internal structure of a vehicle double draw hood lock of the present invention; Figure 4 This is a schematic diagram of the housing structure of a vehicle double draw hood lock according to the present invention; Figure 5 This is a schematic diagram of a card plate structure of a vehicle double hood lock according to the present invention; Figure 6 It is a schematic diagram of the claw structure of a vehicle double hood lock of the present invention; Figure 7 It is a schematic diagram of the outline position of the engagement between the clamping plate and the clamping claw of the present invention; Figure 8 Schematic diagram of the engagement change state of a vehicle double hood lock of the present invention, in which a represents the fully locked position, b represents the fully locked unlocked position, c represents the stop position, d represents the stop release critical position, e represents the half-locked position, f represents the half-locked unlocked position, and g represents the fully opened position (unlocked position); Fig. 9 It is a CAE analysis diagram of the full lock engagement strength of the vehicle double draw cover lock of the present invention; Fig.10It is a schematic diagram of CAE analysis of the half-lock engagement strength of the vehicle double draw cover lock of the present invention; Fig.11 It is a schematic diagram of CAE analysis of the stopping position strength of the vehicle double hood lock of the present invention; In the figure: 1, shell; 101, shell back plate; 102, first side edging; 103, second side edging; 2, lock slot; 3, lock; 4, card plate; 401, full lock meshing part; 402, half lock meshing part; 403, card plate slot; 404, card plate stop part; 405, card plate torsion spring hanging arm; 5, card plate rivet shaft; 6, card plate torsion spring; 7, claw; 701, claw locking part; 702, claw stop part; 703, claw torsion spring hanging arm; 704, pull trigger part; 8, claw rivet shaft; 9, claw torsion spring; 10, micro switch; 11, connecting hole; 12, limiting protrusion; 13, giving way hole; 14, limiting connecting slot; 15, connecting ear plate; 16, bracket; 1601, slot; 17, pulling member; 18, limiting block. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] like Figure 1 to Figure 6 As shown, a vehicle double hood lock comprises a housing 1, a lock slot 2 is provided on the housing 1, and a clamping plate assembly and a claw assembly are provided on both sides of the lock slot 2 to control the locking and unlocking states of the lock 3 in the lock slot 2; the clamping plate assembly comprises a rotatable clamping plate 4, a clamping plate buckle is provided on the clamping plate 4, and a clamping plate stopper 404 away from the clamping plate buckle, the clamping plate buckle comprises a clamping plate slot 403 for accommodating the lock 3, and a full locking meshing portion 401 and a half locking meshing portion 402 located on both sides of the clamping plate slot 403; The claw assembly includes a rotatable claw 7, one end of the claw 7 is provided with a claw locking portion 701, the other end is provided with a pull trigger portion 704, and the end close to the pull trigger portion 704 is provided with a claw stopping portion 702; the claw locking portion 701 is engaged with the fully locked meshing portion 401 in the fully locked state, and the claw locking portion 701 is engaged with the semi-locked meshing portion 402 in the semi-locked state; the claw stopping portion 702 and the card plate stopping portion 404 cooperate with each other multiple times during the fully locked, semi-locked and unlocked processes.

[0023] The vehicle double hood lock improves the structure and connection and installation method of the shell, the card plate assembly and the claw assembly so that it has full locking (primary locking), half locking (secondary locking) and unlocking functions. The functions of the three states can be achieved by pulling and deflecting the claws. The operation is simple and smooth with high stability. Moreover, the overall structure is compact, the space occupied is small, there are no obvious protrusions outside the shell, there are fewer additional mechanisms, the loading and matching is relatively concealed, and it is not easy to obstruct or scratch objects.

[0024] The claw assembly and the card plate assembly are both installed within the range enclosed by the shell 1 and can rotate relative to each other so that the claw 7 and the card plate 4 can engage or stop at multiple positions, allowing the lock 3 to move along the lock slot 2 under the control of the card plate slot 403, thereby realizing multi-level locking and unlocking functions.

[0025] The card slot 403 on the card plate 4 can cooperate with the lock slot 2 to limit and lock the lock 3 during the rotation of the card plate 4; or completely release the lock so that the lock 3 can be moved out of the lock slot 2.

[0026] The card plate 4 is provided with two-stage engagement (full-lock engagement portion 401 and half-lock engagement portion 402) and the card plate stop portion 404, and the claw 7 is provided with the claw locking portion 701 and the claw stop portion 702. When the claw is pulled, after the main lock is opened, the secondary locking is achieved through the stopping of the two stop portions, and the secondary lock is unlocked by pulling the claw again.

[0027] Through the above-mentioned cooperation, all locking and unlocking actions can be completed by the cooperation of the claw assembly, the card plate assembly and the shell, without the need to equip more secondary mechanisms and opening and closing mechanisms, so that the cover lock has fewer parts and lighter weight. The installation hole spacing of the cover lock can control the cover to 110-120mm, and the installation space can be controlled within 140*90*28mm.

[0028] The double hood lock of the vehicle only needs to pull the claw 7 twice (pull and then release) to realize the change of the lock buckle 3 in the positions of full lock, main lock unlocking, stop, stop release, half lock locked, half lock unlocked and full open. The card plate can rotate completely by itself, and its locking at the key position is realized by using the limit of the claw or the shell. The range of its movement depends on the limit of the claw 7 and the shell 1; the claw 7 can reciprocate within the set angle. Although multiple locking functions are realized, the movement amplitude will not be large and the space occupied by the activity is small.

[0029] Furthermore, the shell 1 includes a shell back plate 101, the locking groove 2 is arranged on the shell back plate 101, the shell back plate 101 is provided with a first side edging 102 at the edge of the side where the card plate assembly is located, and the shell back plate 101 is provided with a second side edging 103 at the edge of the side where the claw assembly is located, the first side edging 102 and the second side edging 103 form a semi-enclosed structure of the shell, and the card plate 4 and the claw 7 move in the area between the first side edging and the second side edging.

[0030] The semi-enclosed structure formed by the shell back panel 101 and the first side edge 102 and the second side edge 103 not only facilitates the connection and installation of functional parts such as the card assembly and the claw assembly, but also can utilize its semi-enclosed manner to wrap the functional parts. After assembly with the front-end module, these functional parts will be enclosed therein.

[0031] The first side edge 102 and the second side edge 103 are further provided with connecting ear plates 15 bent to the left and right sides. The connecting ear plates 15 are respectively provided with mounting connecting holes to facilitate the connection of the front-end module.

[0032] In addition to forming an enclosure, the first side edge 102 and the second side edge 103 can also connect the card assembly and the claw assembly, and limit the card assembly and the claw assembly. Specifically, the first side edge 102 is provided with a connecting hole 11, which can be connected to one end of the card torsion spring 6 on the card assembly, a limiting protrusion 12 is provided between the upper side of the first side edge 102 and the shell back plate 101, and a clearance hole 13 is provided between the lower side and the shell back plate 101. The upper limiting protrusion 12 can limit the extreme position of the card 4, that is, when the card 4 is in a fully open state, its outer side wall will abut against the limiting protrusion 12 and will not continue to rotate, and the lower clearance hole 13 facilitates the routing of the micro switch 10; the upper side of the second side edge 103 is provided with a limiting connection groove 14, which can be connected to and limit one end of the claw torsion spring 9 on the claw assembly.

[0033] Furthermore, the card plate assembly also includes a card plate rivet shaft 5, and a card plate torsion spring 6 mounted on the card plate rivet shaft 5, the end of the card plate rivet shaft 5 is provided with a first connecting shaft, and the first connecting shaft passes through the card plate 4 and is connected to the shell 1; the card plate 4 is provided with a card plate torsion spring hanging arm 405 on the side close to the card plate stop portion 404, one end of the card plate torsion spring 6 is clamped at the card plate torsion spring hanging arm 405, and the other end is connected to the side edge of one side of the shell 1 (such as the first side edge).

[0034] The card plate rivet shaft 5 can be connected to the card plate 4 and installed on the shell back plate 101 by using the first connecting shaft. The card plate torsion spring 6 is installed on the card plate rivet shaft 5, and its restoring force can be used to allow the card plate 4 to deflect within a certain range. The card plate torsion spring 6 can not only provide the card plate 4 with a ejection lock function, but also can be wrapped in the shell 1. There is no additional mechanism and no more prominent accessories. The end of the card plate 4 basically does not extend from the top of the shell. At most, the tooth end of the fully locked meshing part will be exposed a little bit in the fully open state. Compared with the protrusion of the existing cover lock card plate and claw structure, this card plate and claw can basically be considered as non-protruding functional parts.

[0035] Furthermore, the fully locked meshing portion 401 and the semi-locked meshing portion 402 are respectively provided with upturned meshing teeth, the outer surface of the meshing teeth is an arc surface, and a turning point is provided at the root of the meshing teeth. There is a diameter difference of not less than 3.5 mm between the contour circle swept by the outer surface of the meshing teeth and the contour circle swept by the root of the teeth; the end of the clamping plate stop portion does not exceed the range of the contour circle swept by the outer surface of the meshing teeth.

[0036] Although the sizes and structures of the two meshing teeth are not exactly the same, the trends of the teeth are consistent, and the tooth ends are basically within the same circle. The arc surface structure is conducive to the passage of the clamping plate through the claw when it returns to the locked position, that is, the full-locking meshing part and the semi-locking meshing part will not be hooked by the claw locking part when they return clockwise, and will also compress the claw locking part to deflect the claw so that it can pass. The turning point set at the root of the tooth can form a hook shape so as to engage with the claw locking part to form a one-way locking relationship.

[0037] Combination Figure 7 As shown, the 3.5mm diameter difference formed by the two contour circles is also the maximum engagement amount formed between the pawl locking portion and the meshing tooth. The preferred maximum engagement amount is 4.7mm, which can provide sufficient locking force and effectively control its size. When the pawl locking portion is engaged with the meshing tooth, there is still a gap between the tooth end of the meshing tooth and the pawl (the root of the pawl locking portion), which is beneficial to the rotation of the meshing tooth and the release of the locked state.

[0038] Furthermore, the claw assembly also includes a claw rivet shaft 8 and a claw torsion spring 9, one end of the claw rivet shaft 8 is provided with a second connecting shaft, the second connecting shaft passes through the claw 7 at a position slightly above the middle of the claw 7 and is connected to the shell 1, the claw 7 is provided with a claw torsion spring hanging arm 703 on the edge of the side away from the claw stop portion 702, one end of the claw torsion spring 9 is connected to the claw torsion spring hanging arm 703, and the other end is connected to the side edging on the other side of the shell (such as the second side edging).

[0039] Similarly, the claw rivet shaft 8 can be connected and installed together with the claw on the back plate of the housing by using the second connecting shaft, and the claw torsion spring 9 is installed on the claw rivet shaft 8, and can use its restoring force to deflect the claw 7 back to its original position in the released state. One end of the claw torsion spring 9 is connected to the limiting connection groove 14 on the second side edge 103 at the top, and the other end is connected to the claw torsion spring hanging arm 703 on the lower part of the claw, so that the claw 7 can be deflected in the left and right directions.

[0040] Furthermore, a limit stopper 18 is provided between the inner side of the second side edge 103 and the side wall where the claw is close to the torsion spring arm of the claw, and the limit stopper 18 can limit the extreme position of the claw 7 without deflection.

[0041] Furthermore, the claw locking portion 701 is a hook-shaped portion that is arranged at the upper end of the claw and is obliquely buckled downward, and the pull trigger portion 704 is a pull connecting arm that is arranged at the lower end of the claw; when the pull connecting arm is deflected to the extreme position away from the card plate (referring to the lower end of the claw being away from the card plate, that is, the right extreme position of the pull trigger portion), the claw locking portion approaches the card plate and engages with the full-lock engagement portion, or engages with the half-lock engagement portion, or is in an unlocked state; when the pull connecting arm is deflected to the extreme position close to the card plate (referring to the lower end of the claw being close to the card plate, that is, the left extreme position of the pull trigger portion), the claw stop portion engages with the card plate stop portion, and there will be an upper stop interface and a lower stop interface.

[0042] Furthermore, a micro switch 10 is provided on the shell 1, and the micro switch 10 is arranged at a lower position where the card plate rotates, that is, at a lower position of the back plate of the shell. The trigger piece of the micro switch 10 contacts the outer peripheral surface of the card plate 4 away from the fully locked meshing portion. The position where the micro switch 10 is set is such that when the card plate is locked (from the stop position to the fully open position), the trigger piece is pressed together to realize the transmission of the unlocking signal trigger.

[0043] Furthermore, a bracket 16 is provided on one side of the housing 1 away from the locking slot 2, and the bracket 16 is connected to a pulling member 17, and one end of the pulling member 17 is connected to the pulling trigger portion 704. The bracket 16 is arranged perpendicular to the housing back plate 101, and the bracket 16 is provided with a card slot 1601; the pulling member 17 includes a fixed rod, the fixed rod is installed in the card slot, a pull rod or a pull wire is provided in the fixed rod, and a ball head is provided at the end of the pull rod or the pull wire, and the pulling trigger portion is in the shape of an inwardly buckled hook, and the pull wire passes through the pulling trigger portion so that the ball head abuts against the other side of the pulling trigger portion to form a limit of the ball head, so that the claw can be driven to deflect when the pull rod or the pull wire is pulled.

[0044] A control method for a vehicle double hood lock, combined with Figure 8 As shown, the control method comprises the following steps: When the vehicle double hood lock is in the fully locked state ( Figure 8 In the middle view a), the lock buckle 3 is located inside the lock buckle slot 2, the claw locking portion 701 is engaged with the full-locking engagement portion 401, and the pull trigger portion 704 is in an extreme position away from the card plate 4, that is, the right extreme position; The pull trigger portion 704 is pulled, and the pull trigger portion 704 approaches the limit position (i.e., the left limit position) close to the card plate 4, the claw locking portion 701 and the full locking engagement portion 401 are gradually separated, the half locking engagement portion 402 moves toward the claw locking portion 701, and the card plate stop portion 404 moves toward the claw stop portion 702; when the pull trigger portion 704 is at the left limit position of the card plate, the card plate stop portion 404 abuts against the lower interface of the claw stop portion 702 and is in the stop position ( Figure 8 c view); The pulling trigger portion 704 is released, the claw 7 returns to its original position, and the claw stop portion 702 is separated from the card plate stop portion 404; then the claw locking portion 701 is connected to the rotated half-locking engagement portion 402, and the lock buckle 3 is in the middle position of the lock buckle slot 2 ( Figure 8 (middle view); Pull the pull trigger part 704 again, the pull trigger part 704 returns to the left extreme position of the card plate again, the card plate 4 rotates, and the claw locking part 701 is separated from the semi-locked meshing part 402; release the pull trigger part 704 again, the claw 7 returns to its original position, that is, the right extreme position, the full-locked meshing part 401 and the semi-locked meshing part 402 are both away from the claw locking part 701, the card plate stopping part 404 is separated from the claw stopping part 702, and the lock buckle 3 is at the opening of the lock buckle slot 2, that is, the fully unlocked state.

[0045] The vehicle double hood lock is controlled by the above structure and operation method. It is not only simple and compact in structure and easy to operate, but also requires less operating force, has higher static strength and higher durability for frequent opening and closing. The operating force is 45±10N, and the operating force of the safety hook handle is ≤20N. The tension in the Z direction under the fully locked state is ≥5.89KN, the tension in the X and Y directions is ≥1.5KN, and the tension of the safety lock hook is ≥3.0KN. After the hood lock is opened and closed 6000 times, there is no problem in opening and closing. Fig. 9 It can be seen that the clamping plate and the clamping claw have high strength in the fully locked state (main locked state), and the force state at the meshing part is good; Fig.10 It can be seen that the clamping plate and the clamping claw have a high strength in the semi-locked state, and the force state of the meshing part is also good; Fig.11 It can be seen that when the clamping plate and the clamping claw are in the stopped position, the clamping plate stop part and the clamping claw stop part have relatively high strength and are in a good stress state.

[0046] The double hood lock of this vehicle also has good opening and closing functions under extreme conditions. After 10 standard cycles in the set mud test liquid, each component moves flexibly without jamming and the basic functions are normal. The cyclic test method (one standard cycle) of the double hood lock of the vehicle provided in this application is as follows: the sample (hood lock) is immersed in the mud test liquid, and the semi-locking and full-locking operations are performed 10 times each → the sample is left to stand for 4 hours at 80±2℃ and relative humidity of 90±10% → the sample is dried at 80±2℃ for 1 hour → the sample is washed with clean water → the sample is dried at 80±2℃ for 1 hour → the sample is immersed in the mud test liquid, and the semi-locking and full-locking operations are performed 10 times each → the sample is left to stand for 14 hours at 80±2℃ and relative humidity of 90±10% → the sample is dried at 80±2℃ for 1 hour → the sample is washed with clean water → the sample is dried at 80±2℃ for 1 hour → the sample is immersed in the mud test liquid, and the semi-locking and full-locking operations are performed 10 times each → the sample is left to stand for 14 hours at 80±2℃ and relative humidity of 90±10% → the sample is dried at 80±2℃ for 1 hour → the sample is washed with clean water → the sample is dried at 80±2℃ for 1 hour After the test, the parts of the sample have no abnormalities such as deformation, damage, surface treatment changes, and the movement function is normal. The cover lock components move flexibly without jamming, the basic functions are normal, and the performance meets the requirements.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle double hood lock, comprising a housing, characterized in that: The housing is provided with a lock buckle slot, and a card assembly and a claw assembly are provided on both sides of the lock buckle slot to control the lock buckle in the lock buckle slot. The card assembly includes a rotatable card plate, a card buckle is provided on the card plate, and a card stopper away from the card buckle, and the card buckle includes a card slot for accommodating the lock buckle, and a full locking meshing part and a half locking meshing part located on both sides of the card slot; The claw assembly includes a rotatable claw, one end of the claw is provided with a claw locking portion, the other end is provided with a pull trigger portion, and the end close to the pull trigger portion is provided with a claw stopping portion; the claw locking portion is engaged with the fully locked meshing portion in a fully locked state, and the claw locking portion is engaged with the semi-locked meshing portion in a semi-locked state; the claw stopping portion and the card plate stopping portion cooperate with each other multiple times during the fully locked, semi-locked and unlocked processes.

2. The vehicle double hood lock according to claim 1, characterized in that: The shell includes a shell back plate, the locking groove is arranged on the shell back plate, the shell back plate is provided with a first side edge on the edge of the side where the card assembly is located, and the shell back plate is provided with a second side edge on the edge of the side where the claw assembly is located. The first side edge and the second side edge form a semi-enclosed structure of the shell, and the card and the claw move in the area between the first side edge and the second side edge.

3. The vehicle double hood lock according to claim 2, characterized in that: A connecting hole is provided on the first side edge, a limiting protrusion is provided between the upper side of the first side edge and the shell back plate, and a clearance hole is provided between the lower side and the shell back plate; a limiting connecting groove is provided on the upper side of the second side edge.

4. The vehicle double hood lock according to claim 1, characterized in that: The card plate assembly also includes a card plate rivet shaft, and a card plate torsion spring sleeved on the card plate rivet shaft, the end of the card plate rivet shaft is provided with a first connecting shaft, the first connecting shaft passes through the card plate and is connected to the shell; the card plate is provided with a card plate torsion spring hanging arm on one side close to the card plate stop portion, one end of the card plate torsion spring is clamped at the card plate torsion spring hanging arm, and the other end is connected to the side edge of one side of the shell.

5. The vehicle double hood lock according to claim 1, characterized in that: The fully locked meshing portion and the semi-locked meshing portion are respectively provided with upturned meshing teeth, the outer surface of the meshing teeth is an arc surface, and a turning point is provided at the root of the meshing teeth. There is a diameter difference of not less than 3.5 mm between the contour circle swept by the outer surface of the meshing teeth and the contour circle swept by the root of the teeth; the end of the clamping plate stop portion does not exceed the range of the contour circle swept by the outer surface of the meshing teeth.

6. The vehicle double hood lock according to claim 1, characterized in that: The claw assembly also includes a claw rivet shaft and a claw torsion spring, one end of the claw rivet shaft is provided with a second connecting shaft, the second connecting shaft passes through the claw at a position slightly above the middle of the claw and is connected to the shell, the claw is provided with a claw torsion spring hanging arm on the edge of the side away from the claw stop portion, one end of the claw torsion spring is connected to the claw torsion spring hanging arm, and the other end is connected to the side edge on the other side of the shell.

7. The vehicle double hood lock according to claim 1, characterized in that: The claw locking portion is in the shape of a hook that is arranged at the upper end of the claw and is obliquely buckled downward, and the pulling trigger portion is a pulling connecting arm arranged at the lower end of the claw; when the pulling connecting arm is deflected to the extreme position away from the card plate, the claw locking portion approaches the card plate and engages with the full-locking engagement portion, or engages with the half-locking engagement portion, or is in an unlocked state; when the pulling connecting arm is deflected to the extreme position close to the card plate, the claw stopping portion engages with the card plate stopping portion.

8. The vehicle double hood lock according to claim 1, characterized in that: The housing is also provided with a micro switch, which is arranged at a lower position where the card plate rotates, and a trigger sheet of the micro switch contacts an outer peripheral surface of the card plate away from the full-locking meshing portion.

9. The vehicle double hood lock according to claim 1, characterized in that: A bracket is further provided on one side of the shell away from the locking groove, the bracket is connected with a pulling member, and one end of the pulling member is connected to the pulling trigger part.

10. A control method for a vehicle double hood lock according to any one of claims 1 to 9, characterized in that: The control method comprises the following steps: When the vehicle double hood lock is in a fully locked state, the lock buckle is located inside the lock buckle groove, the claw locking portion is connected to the fully locked meshing portion, and the pull trigger portion is in an extreme position away from the card plate; The pull trigger part is pulled, and the pull trigger part approaches the extreme position close to the card plate, the claw locking part and the full locking meshing part are gradually separated, the half locking meshing part moves toward the claw locking part, and the card plate stop part moves toward the claw stop part; when the pull trigger part is in the extreme position close to the card plate, the card plate stop part abuts against an interface of the claw stop part and is in the stop position; The pulling trigger portion is released, the claw returns to its original position, the claw stop portion is separated from the card plate stop portion, the claw locking portion is connected to the rotated half-locking engagement portion, and the lock is in the middle position of the lock slot; Pull the pull trigger part again, the pull trigger part returns to the extreme position close to the card plate, the card plate rotates, and the claw locking part is separated from the semi-locking engagement part; release the pull trigger part again, the claw returns to the original position again, the full-locking engagement part and the semi-locking engagement part are both away from the claw locking part, the card plate stopping part is separated from the claw stopping part, and the lock is at the opening of the lock groove.

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