Tail door lock of electric automobile

Abstract

The utility model discloses an electric automobile tail door lock which comprises a shell, and a clamping groove used for containing an automobile tail door lock buckle and arranged at the front end of the shell is formed in the shell. The first locking piece and the second locking piece are installed on the two sides of the clamping groove in the shell, and the first locking piece and the second locking piece are matched to lock the automobile tail door lock buckle; the motor, the transmission gear set and the driving arm are installed at the rear end of the shell, the motor drives the driving arm through the transmission gear set to drive the second locking piece to be away from the first locking piece, and the automobile tail door lock buckle is unlocked. According to the automobile tail door lock, only one motor is used, unlocking, half-locking and full-locking of the automobile tail door lock can be achieved, the overall structure integration degree is high, the unlocking transmission process and the locking transmission process are smooth, a traditional connecting rod structure is abandoned, and noise generated during opening and closing actions is very low.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile tailgate locks, in particular to an electric vehicle tailgate lock. Background Art

[0002] Currently, most automobile tailgate locks on the market rely on an electric drive system to open the tailgate. Such locks drive an actuator through an external power source, and then the actuator pushes an opening lever to complete the unlocking action. However, during the rotation of the lever, a certain amount of resistance will inevitably be generated. If this resistance exceeds a certain range, it may cause faults in the tailgate lock, and then lead to the inability of the tailgate to close and lock normally. In addition, when the actuator operates the opening lever, noise may also be generated.

[0003] Existing tailgate locks usually require two independent motors to control the closing and opening processes of the lock respectively. Such a design not only increases the number of system components and reduces the overall integration, but also increases the risk of jamming during the opening and closing operations of the lock, especially more obvious during the opening operation. In addition, these systems also have noise problems during operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electric vehicle tailgate lock to solve the technical problems mentioned in the above background art, aiming to make the unlocking and locking actions smoother and significantly reduce the noise generated during the execution of the opening and closing actions.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electric vehicle tailgate lock includes a housing, and the following are installed inside the housing:

[0007] The front end of the housing has a card slot for accommodating the buckle of the automobile tailgate lock;

[0008] A first locking member and a second locking member are installed on both sides of the card slot inside the housing, and the first locking member and the second locking member cooperate to lock the buckle of the automobile tailgate lock;

[0009] A motor, a transmission gear set and a driving arm are installed at the rear end of the housing, and the motor drives the driving arm through the transmission gear set to drive the second locking member away from the first locking member to unlock the buckle of the automobile tailgate lock.

[0010] As a further description of the above technical solution:

[0011] The first locking member includes a first locking tongue, one end of the first locking tongue is rotatably installed at the rear end of the housing through a rotating shaft on the mounting hole, the other end of the first locking tongue is the locking tongue end, and a locking groove for cooperating with the buckle of the automobile tailgate lock is provided on one side of the first locking tongue close to the locking tongue end.

[0012] As a further description of the above technical solution:

[0013] The first locking member further includes a first torsion spring and a second torsion spring. On the first locking tongue, bosses are respectively fixed at positions close to the mounting hole and the locking groove, and the first torsion spring and the second torsion spring are sleeved on the corresponding convex columns.

[0014] As a further description of the above technical solution:

[0015] The second locking member includes a second locking tongue. One end of the second locking tongue is rotatably mounted at the front end of the housing through a rotating shaft. A stop member is arranged on the side of the second locking tongue close to the first locking tongue. Along the counterclockwise direction of the stop member, a semi-locking ratchet groove and a full-locking ratchet groove are sequentially arranged on the side surface of the second locking tongue.

[0016] As a further description of the above technical solution:

[0017] The second locking member further includes a third torsion spring, and the third torsion spring is sleeved on the rotating shaft for mounting the second locking tongue.

[0018] As a further description of the above technical solution:

[0019] The second locking member further includes a driven arm, and the driven arm is fixed to the other end of the second locking tongue.

[0020] As a further description of the above technical solution:

[0021] The first torsion spring, the second torsion spring and the third torsion spring all have a plurality of protruding ends, and the protruding ends are respectively restricted by the housing or the corresponding locking tongue.

[0022] As a further description of the above technical solution:

[0023] The transmission gear set includes a first helical gear, a second helical gear, a first worm shaft, a first worm gear, a second worm shaft, a second worm gear, a third worm shaft and an incomplete worm gear. The three worm shafts and the incomplete worm gear are all rotatably mounted at the rear end of the housing. The first helical gear is fixedly sleeved on the output shaft of the motor. The second helical gear is fixedly sleeved at the bottom end of the first worm shaft. The first worm gear is fixedly sleeved at the top end of the second worm shaft. The second worm gear is fixedly sleeved at the top end of the third worm shaft;

[0024] The first helical gear is meshed and connected with the second helical gear. The first worm gear is meshed and connected with the worm section of the first worm shaft. The second worm gear is meshed and connected with the worm section of the second worm shaft. The incomplete worm gear is meshed and connected with the worm section of the third worm shaft. The driving arm is fixedly connected to the incomplete worm gear.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows: When locking, the buckle of the automobile tail door lock enters the lock slot and pushes the first locking tongue to rotate clockwise. The second locking tongue always keeps in contact with the first locking tongue due to the action of the third torsion spring. The locking tongue end of the first locking tongue pushes the stop end of the second locking tongue to retract, so that the first locking tongue reaches the half-lock ratchet slot, realizing half-lock. At this time, if the buckle of the automobile tail door lock continues to push the first locking tongue to rotate clockwise, the second locking tongue always adheres to the first locking tongue by relying on the third tension spring, so that the first locking tongue reaches the full-lock ratchet slot, realizing full-lock.

[0026] When unlocking is required, the motor rotates forward, drives the driving arm to rotate clockwise through the transmission gear set, pushes the second locking tongue to rotate counterclockwise, separates the two groups of locking tongues. The first locking tongue rotates counterclockwise under the action of the first and second torsion springs and returns to the unlocking state, and the locking tongue returns to its position under the action of the third torsion spring.

[0027] The present utility model only uses one motor to realize unlocking, half-locking and full-locking of the automobile tail door lock. The overall structure has a high integration degree. The unlocking transmission process and the locking transmission process are smooth. Moreover, the traditional connecting rod structure is abandoned, and the noise generated during the switching action is very small. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. shows a three-dimensional structural schematic diagram of an electric vehicle tail door lock in a half-locked state according to an embodiment of the present utility model;

[0029] Figure 2 FIG. shows a top view of an electric vehicle tail door lock in a half-locked state according to an embodiment of the present utility model;

[0030] Figure 3 FIG. shows a three-dimensional structural schematic diagram of an electric vehicle tail door lock according to an embodiment of the present utility model;

[0031] Figure 4 FIG. shows a connection schematic diagram of a motor, a transmission gear set and a driving arm according to an embodiment of the present utility model;

[0032] Figure 5 FIG. shows a structural schematic diagram of a first locking member according to an embodiment of the present utility model;

[0033] Figure 6 FIG. shows a structural schematic diagram of a second locking member according to an embodiment of the present utility model.

[0034] Legend Explanation:

[0035] 1. Housing; 2. Motor; 3. Transmission gear set; 31. First helical gear; 32. Second helical gear; 33. First worm shaft; 34. First worm gear; 35. Second worm shaft; 36. Second worm gear; 37. Third worm shaft; 38. Incomplete worm gear; 4. Card slot; 5. Driving arm; 6. First locking member; 61. First locking tongue; 6101. Mounting hole; 6102. Locking groove; 62. First torsion spring; 63. Second torsion spring; 64. Locking tongue end; 7. Second locking member; 71. Second locking tongue; 7101. Full locking ratchet groove; 7102. Half locking ratchet groove; 72. Third torsion spring; 73. Stopper; 74. Driven arm. Detailed implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figure 1-6 , the present invention provides a technical solution: an electric vehicle tailgate lock, including a housing 1, the front end of the housing 1 has a card slot 4 for accommodating the electric vehicle tailgate lock buckle, the first locking member 6 and the second locking member 7 are installed on both sides of the card slot 4 in the housing 1, the first locking member 6 and the second locking member 7 cooperate to lock the electric vehicle tailgate lock buckle, the motor 2, the transmission gear set 3 and the driving arm 5 are installed at the rear end of the housing 1, and the motor 2 drives the driving arm 5 through the transmission gear set 3 to drive the second locking member 7 away from the first locking member 6 to unlock the electric vehicle tailgate lock buckle.

[0038] Specifically, as Figure 1-3 and Figure 5 shown, the first locking member 6 includes a first locking tongue 61, a first torsion spring 62 and a second torsion spring 63. One end of the first locking tongue 61 is rotatably installed at the rear end of the housing 1 through a first rotating shaft on the mounting hole 6101. The other end of the first locking tongue 61 is the locking tongue end 64. A locking groove 6102 for cooperating with the electric vehicle tailgate lock buckle is provided on one side of the first locking tongue 61 close to the locking tongue end 64. Protrusions are respectively fixed on the first locking tongue 61 at positions close to the mounting hole 6101 and the locking groove 6102. The first torsion spring 62 and the second torsion spring 63 are sleeved on the corresponding protrusions. In the initial state, the locking groove 6102 is located on one side of the card slot 4. After the electric vehicle tailgate lock buckle cooperates with the locking groove 6102 through the card slot 4 and continues to press the locking groove 6102, the first locking tongue 61 will be driven to rotate clockwise around the first rotating shaft against the acting force of the two groups of torsion springs. Since the locking tongue end 64 is blocked by the second locking tongue 71, the overlapping slot position of the locking groove 6102 and the card slot 4 locks the buckle.

[0039] Specifically, as Figure 1-3 and Figure 6 shown, the second locking member 7 includes a second locking tongue 71, a third torsion spring 72 and a driven arm 74. One end of the second locking tongue 71 is rotatably mounted on the front end of the housing 1 through a second rotating shaft. A stop member 73 is provided on the side of the second locking tongue 71 close to the first locking tongue 61. Along the counterclockwise direction of the stop member 73, a semi-locking ratchet groove 7102 and a full-locking ratchet groove 7101 are sequentially arranged on the side surface of the second locking tongue 71. The third torsion spring 72 is sleeved on the rotating shaft for mounting the second locking tongue 71, and the driven arm 74 is fixed to the other end of the second locking tongue 71. In the initial state, the locking tongue end 64 of the first locking tongue 61 contacts the stop member 73. When the first locking tongue 61 rotates clockwise, it squeezes the stop member 73 to retract. When the locking tongue end 64 moves to the semi-locking ratchet groove 7102, the half-lock of the car tailgate lock buckle is realized. When the locking tongue end 64 continues to move to the full-locking ratchet groove 7101, the full-lock of the car tailgate lock buckle is realized. During the whole process, under the action of the third torsion spring 72, the second locking tongue 71 is always in contact with the locking tongue end 64.

[0040] Specifically, as Figure 1 and Figure 4 shown, the transmission gear set 3 includes a first helical gear 31, a second helical gear 32, a first worm shaft 33, a first worm gear 34, a second worm shaft 35, a second worm gear 36, a third worm shaft 37 and an incomplete worm gear 38. The three groups of worm shafts and the incomplete worm gear 38 are all rotatably mounted on the rear end of the housing 1. The first helical gear 31 is fixedly sleeved on the output shaft of the motor 2. The second helical gear 32 is fixedly sleeved on the bottom end of the first worm shaft 33. The first worm gear 34 is fixedly sleeved on the top end of the second worm shaft 35. The second worm gear 36 is fixedly sleeved on the top end of the third worm shaft 37. The first helical gear 31 is meshed and connected with the second helical gear 32. The first worm gear 34 is meshed and connected with the worm section of the first worm shaft 33. The second worm gear 36 is meshed and connected with the worm section of the second worm shaft 35. The incomplete worm gear 38 is meshed and connected with the worm section of the third worm shaft 37. The driving arm 5 is fixedly connected to the incomplete worm gear 38. When the motor 2 is started, it drives the first helical gear 31 to rotate. The first helical gear 31 drives the second helical gear 32 to drive the first worm shaft 33 to rotate. The first worm shaft 33 drives the first worm gear 34 to drive the second worm shaft 35 to rotate. The second worm shaft 35 drives the second worm gear 36 to drive the third worm shaft 37 to rotate. The third worm shaft 37 drives the incomplete worm gear 38 to drive the driving arm 5 to rotate clockwise. The driving arm 5 pushes the driven arm 74 to drive the second locking tongue 71 to rotate counterclockwise around the second rotating shaft. With the help of an external force, the second locking tongue 71 is separated from the contact with the locking tongue end 64.

[0041] Specifically, as Figure 1As shown in the figure, the first torsion spring 62, the second torsion spring 63, and the third torsion spring 72 all have multiple protruding ends, and the protruding ends are respectively restricted by the housing 1 or the corresponding locking tongues. The locking tongues rotate against the acting force of the torsion springs. When the locking tongues reach relevant positions and are restricted, they maintain their current states. When the locking tongues are no longer restricted, the torsion springs will drive the locking tongues to return to their original positions. Among them, the first and second torsion springs always apply a force to drive the first locking tongue 61 to rotate counterclockwise. That is, when the locking tongue end 64 of the first locking tongue 61 is no longer restricted, the first locking tongue 61 will rotate counterclockwise around the first rotating shaft under the action of the torsion spring and return to its original position. The third torsion spring 72 always applies a force to drive the second locking tongue 71 to rotate clockwise. That is, when there is no external force acting on the second locking tongue 71, it will always be in contact with the locking tongue end 64 of the first locking tongue 61.

[0042] The present utility model only uses one motor to achieve unlocking, semi-locking, and full-locking of the car tailgate lock. The overall structure has a high degree of integration. The unlocking transmission process and the locking transmission process are smooth. Moreover, the traditional connecting rod structure is abandoned, and the noise generated during the switching operation is very small.

[0043] Working principle: During use, in the initial state, the lock slot 6102 is located on one side of the slot 4. Under the acting force of the third torsion spring 72, the second locking tongue 71 is always in contact with the locking tongue end 64, and the locking tongue end 64 of the first locking tongue 61 is in contact with the stop member 73.

[0044] When locking, after the car tailgate lock buckle is engaged with the lock slot 6102 through the slot 4 and continues to press the lock slot 6102, it will drive the first locking tongue 61 to rotate clockwise around the first rotating shaft against the acting force of the two groups of torsion springs. When the first locking tongue 61 rotates clockwise, it presses the stop member 73 to retract. When the locking tongue end 64 moves to the semi-lock ratchet slot 7102, semi-locking of the car tailgate lock buckle is achieved. When the locking tongue end 64 continues to move to the full-lock ratchet slot 7101, full-locking of the car tailgate lock buckle is achieved. During the whole process, due to the blocking of the second locking tongue 71, the overlapping slot positions of the lock slot 6102 and the slot 4 lock the buckle.

[0045] When unlocking, start the motor 2 to drive the first helical gear 31 to rotate. The first helical gear 31 drives the second helical gear 32 to drive the first worm shaft 33 to rotate. The first worm shaft 33 drives the first worm gear 34 to drive the second worm shaft 35 to rotate. The second worm shaft 35 drives the second worm gear 36 to drive the third worm shaft 37 to rotate. The third worm shaft 37 drives the incomplete worm gear 38 to drive the driving arm 5 to rotate clockwise. The driving arm 5 pushes the driven arm 74 to drive the second locking tongue 71 to rotate counterclockwise around the second rotating shaft. With the help of external force, the second locking tongue 71 is separated from the contact with the locking tongue end 64. The first locking tongue 61 will rotate counterclockwise around the first rotating shaft under the action of the first and second torsion springs and return to the initial state, and the buckle is disengaged from the lock slot 6102 and the slot 4 to achieve unlocking.

[0046] By using only one motor, the unlocking, semi-locking and full-locking of the car tailgate lock can be achieved. The overall structure has a high integration level. The unlocking transmission process and the locking transmission process are smooth. Moreover, the traditional connecting rod structure is abandoned, and the noise generated during the switching action is very small.

[0047] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An electric vehicle tailgate lock, comprising a housing (1), characterized in that, Inside the housing (1), there are installed: The front end of the housing (1) has a card slot (4) for accommodating the buckle of the car tailgate lock; A first locking member (6) and a second locking member (7), which are installed on both sides of the card slot (4) inside the housing (1), and the first locking member (6) and the second locking member (7) cooperate to lock the buckle of the car tailgate lock; A motor (2), a transmission gear set (3) and a driving arm (5), which are installed at the rear end of the housing (1), and the motor (2) drives the driving arm (5) through the transmission gear set (3) to drive the second locking member (7) away from the first locking member (6) to unlock the buckle of the car tailgate lock; The transmission gear set (3) includes a first helical gear (31), a second helical gear (32), a first worm shaft (33), a first worm wheel (34), a second worm shaft (35), a second worm wheel (36), a third worm shaft (37), and an incomplete worm wheel (38). The three groups of worm shafts and the incomplete worm wheel (38) are all rotatably installed at the rear end of the housing (1). The first helical gear (31) is fixedly sleeved on the output shaft of the motor (2), the second helical gear (32) is fixedly sleeved at the bottom end of the first worm shaft (33), the first worm wheel (34) is fixedly sleeved at the top end of the second worm shaft (35), and the second worm wheel (36) is fixedly sleeved at the top end of the third worm shaft (37); The first helical gear (31) is meshed and connected with the second helical gear (32), the first worm wheel (34) is meshed and connected with the worm section of the first worm shaft (33), the second worm wheel (36) is meshed and connected with the worm section of the second worm shaft (35), the incomplete worm wheel (38) is meshed and connected with the worm section of the third worm shaft (37), and the driving arm (5) is fixedly connected to the incomplete worm wheel (38).

2. The electric vehicle tailgate lock according to claim 1, wherein The first locking member (6) includes a first locking tongue (61). One end of the first locking tongue (61) is rotatably installed at the rear end of the housing (1) through a rotating shaft on the mounting hole (6101). The other end of the first locking tongue (61) is a locking tongue end (64). On one side of the first locking tongue (61) close to the locking tongue end (64), there is a locking groove (6102) for cooperating with the buckle of the car tailgate lock.

3. The electric vehicle tailgate lock according to claim 2, wherein, The first locking member (6) further includes a first torsion spring (62) and a second torsion spring (63). On the first locking tongue (61), bosses are respectively fixed at positions close to the mounting hole (6101) and the locking groove (6102), and the first torsion spring (62) and the second torsion spring (63) are sleeved on the corresponding convex columns.

4. The electric vehicle tailgate lock according to claim 3, wherein, The second locking member (7) includes a second locking tongue (71). One end of the second locking tongue (71) is rotatably installed at the front end of the housing (1) through a rotating shaft. On one side of the second locking tongue (71) close to the first locking tongue (61), there is a stop member (73). Along the counterclockwise direction of the stop member (73), a semi-lock ratchet groove (7102) and a full-lock ratchet groove (7101) are sequentially arranged on the side surface of the second locking tongue (71).

5. The tailgate lock of an electric vehicle according to claim 4, characterized in that, The second locking member (7) further includes a third torsion spring (72), and the third torsion spring (72) is sleeved on the rotating shaft for installing the second locking tongue (71).

6. The electric vehicle tailgate lock according to claim 5, characterized in that, The second locking member (7) further includes a driven arm (74), and the driven arm (74) is fixed to the other end of the second locking tongue (71).

7. The tailgate lock of an electric vehicle according to claim 6, wherein The first torsion spring (62), the second torsion spring (63) and the third torsion spring (72) all have a plurality of protruding ends, and the protruding ends are respectively restricted by the housing (1) or the corresponding locking tongues.

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