Electric suction lock

Abstract

An electric suction lock, characterized by comprising a housing, a driving mechanism, a lock tongue, a stopper and a shift fork. The housing has a content space, and a first lock port for a lock hook to be placed in the bottom is provided. The driving mechanism comprises a motor, a worm, a worm wheel and a gear set. The aforementioned worm is arranged at the power output end of the motor, and the aforementioned motor can rotate forward and reverse. One end of the aforementioned worm wheel meshes with the worm for transmission, and the other end is formed with a linkage gear, which meshes with the input end of the aforementioned gear set for transmission, and an output gear is provided at the output end of the aforementioned gear set. The coordinated cooperation of the shift fork, the stopper and the lock tongue is achieved through the gear set transmission combined with the bevel gear cooperation. The overall structure is compact and suitable for installation on various tailgates.

Description

Technical Field

[0001] The invention relates to a lock which is applied to a tailgate of an automobile. Background Art

[0002] When using a traditional car tailgate lock, you need to pull or push the opening lever through a wire or a connecting rod. The opening lever moves the ratchet in the tailgate lock, and the ratchet engages with the ratchet wheel, so that the lock can be disengaged, thereby unlocking the tailgate lock. The wire is driven by an external power supply to drive the actuator, and finally the actuator pushes the opening lever to rotate to unlock the tailgate lock.

[0003] Many tailgate locks of this type are disclosed in the prior art, such as the Chinese invention patent application "Electrically Controlled Automobile Tailgate Lock Body Device" with application number 201310067623.6 (application publication number CN103174342A), in which the lock ring of the tailgate pushes the ratchet, the ratchet rotates to a certain angle to engage with the pawl, and the door is locked; the control console sends an unlocking signal to the unlocking motor, the unlocking motor pushes the pawl, the pawl rotates to a certain angle to disengage from the ratchet, and the door lock is opened; when the electrical appliance fails and the lock cannot be opened, the pawl is manually operated to move the arm to disengage the pawl from the ratchet, so that the door lock is opened.

[0004] Similarly, reference may also be made to the Chinese invention patent "Automobile tailgate lock" with patent number ZL201110321905.5 (authorization announcement number CN 102367715B), the Chinese invention patent application "Automobile tailgate lock opening mechanism" with application number 201510599984.4 (application publication number CN105113877A), etc.

[0005] The tailgate lock of the above type has a complex structure, a large overall size, and takes up a lot of space for installation. At the same time, since the tailgate is closed only by the engagement of the ratchet and the pawl, it is difficult to completely close the tailgate, so improvement is needed.

[0006] The Chinese invention patent application "Electric Suction Lock" (application publication number CN107558830A) with application number 201710948113.8 realizes the opening and closing of the lock by moving the rack back and forth. The overall shape is relatively long and cannot be installed on the tailgates of various vehicles. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an electric suction lock with a compact structure suitable for installation on various vehicles in view of the above technical status.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: an electric suction lock, characterized in that it includes

[0009] The housing has a content space and a first locking opening at the bottom for the locking hook to be inserted into;

[0010] A driving mechanism is arranged on the aforementioned housing, and the driving mechanism includes a motor, a worm, a worm wheel and a gear set. The aforementioned worm is arranged at the power output end of the motor, and the aforementioned motor can rotate forward and reversely. One end of the aforementioned worm wheel is meshed with the worm for transmission, and the other end is formed with a linkage gear, and the linkage gear is meshed with the input end of the aforementioned gear set for transmission. The output end of the aforementioned gear set is provided with an output gear;

[0011] A lock tongue is rotatably disposed in the aforementioned housing and is formed with a second lock opening, and the second lock opening cooperates with the first lock opening to achieve full locking, half locking and opening, and the lock tongue has a first abutment portion and a second abutment portion adjacent to the first abutment portion;

[0012] A first spring, disposed in the housing and used for resetting the locking tongue;

[0013] A stopper, rotatably disposed in the housing and having a first stopper portion and a second stopper portion;

[0014] A second spring, disposed in the housing, for resetting the stopper; and

[0015] A shift fork is rotatably disposed in the housing and has a first bevel tooth formed at one end thereof for meshing with the output gear for transmission, the first bevel tooth being obliquely arranged on the shift fork;

[0016] When the electric lock is in a fully locked state, the second stop portion abuts against the second abutting portion to restrict the lock tongue from rotating;

[0017] The electric lock is in a semi-locked state, the second stop portion abuts against the first abutting portion, and the shift fork is in the first position of the first stop portion;

[0018] The electric suction lock is in an open state, and the fork is in the second position of the first stop portion.

[0019] In order to realize automatic control of the motor, a first micro switch and a second micro switch which are both connected to the motor control are provided in the shell, the first micro switch has an extended first contact head, the second micro switch has an extended second contact head, and the lock tongue is formed with a first convex point which cooperates with the aforementioned first contact head to realize the forward rotation of the motor and a second convex point which cooperates with the aforementioned second contact head to realize the reverse rotation of the motor.

[0020] Furthermore, the first protrusion and the second protrusion are an integral part.

[0021] Considering the installation of the first micro switch and the second micro switch, the following structure is preferred: a bracket is provided in the shell, and a first accommodating groove, a second accommodating groove and an arc-shaped hole close to the first accommodating groove and the second accommodating groove are provided on the bracket; the first micro switch is provided in the first accommodating groove and the first contact head extends toward the arc-shaped hole; the second micro switch is provided in the second accommodating groove and the second contact head extends toward the arc-shaped hole; and the first protrusion and the second protrusion extend upward from the arc-shaped hole.

[0022] In an emergency, the block can be manually driven to release the blocking of the lock tongue and open the electric suction lock. Specifically, one of the following designs can be adopted:

[0023] The first one is that a third micro switch connected to the motor control is provided in the shell near the output gear, and the third micro switch has a protruding third contact head. Correspondingly, a protrusion is raised on the output gear to cooperate with the aforementioned third contact head to realize the return of the fork, and a connecting part that can be connected to an emergency pull rope is provided on the stop block.

[0024] The second type: a third micro switch connected to the motor control is provided near the output gear in the shell, and the third micro switch has a protruding third contact head. Correspondingly, a protrusion is raised on the output gear to cooperate with the aforementioned third contact head to realize the return of the shift fork. A shift block that can act on the block is provided in the shell, and a shift rod extending out of the shell is provided on the shift block. When the aforementioned shift rod is pulled, the block can be caused to rotate and thus release the obstruction of the lock tongue.

[0025] Preferably, the gear set includes a first double gear, a second double gear and an output gear, one end of the aforementioned first double gear is meshed with the linkage gear of the worm gear for transmission, a part of the aforementioned output gear is cylindrical teeth, and the other part is second bevel teeth, the aforementioned cylindrical teeth are meshed with the aforementioned second double gear, and the aforementioned second bevel teeth are meshed with the first bevel teeth.

[0026] Furthermore, the shell has a first accommodating chamber and a second accommodating chamber, the worm gear and the gear set are arranged in the first accommodating chamber, the locking tongue, the stopper and the shift fork are arranged in the second accommodating chamber, and the plane where the first accommodating chamber is located intersects with the plane of the second accommodating chamber at an obtuse angle.

[0027] Compared with the prior art, the invention has the advantages of realizing coordinated cooperation of the shift fork, the block and the lock tongue through the transmission of the gear set combined with the cooperation of the bevel gears, and the overall structure is compact and suitable for installation on various tailgates. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of Example 1.

[0029] Figure 2 This is a side view of Example 1.

[0030] Figure 3 for Figure 1 A schematic diagram of the structure in which the first cover plate and the second cover plate are removed.

[0031] Figure 4 for Figure 3 Partial exploded view of the .

[0032] Figure 5 for Figure 4 Schematic diagram of the structure of the middle drive mechanism from another perspective.

[0033] Figure 6 for Figure 5 Another enlarged combination view of the middle output gear, the third micro switch and the shift fork from another perspective.

[0034] Figure 7 This is a state diagram of Example 1 when it is fully opened.

[0035] Figure 8 This is a diagram of Example 1 in a semi-locked state.

[0036] Fig. 9 This is a state diagram of Example 1 when it is completely locked.

[0037] Fig.10 This is a structural schematic diagram of Example 2.

[0038] Fig.11 This is a schematic diagram of the structure after some components are removed from Example 2. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] Embodiment 1, as Figure 1 to Figure 6 As shown, the electric lock in this embodiment includes a housing 1, a driving mechanism, a lock tongue 5, a first spring 5a, a block 4, a second spring 4a, a fork 3, a bracket 7, a first micro switch 61, a second micro switch 62 and a third micro switch 63.

[0041] Combination Figure 1 and Figure 2 As shown, the housing 1 includes a first base 12, a second base 11, a first cover plate 13 and a third cover plate 14. The first base 12 is connected and assembled with the second base 11. The first cover plate 13 is arranged on the port of the first base 12 to form a first accommodating chamber 1a. The second cover plate 14 is arranged on the second base 11 to form a second accommodating chamber 2a. The second base 11 is provided with a first lock opening 15 for the lock hook to be placed in. The worm gear 22 and the gear set are arranged in the first accommodating chamber 1a, the lock tongue 5, the stopper 4 and the shift fork 3 are arranged in the second accommodating chamber 2a, and the plane where the first accommodating chamber 1a is located intersects with the plane of the second accommodating chamber 2a at an obtuse angle α, as shown in FIG. Figure 2shown.

[0042] Combination Figure 5 As shown, the driving mechanism is arranged on the shell, and the driving mechanism includes a motor 2, a worm 21, a worm wheel 22 and a gear set. The worm 21 is arranged at the power output end of the motor 2, and the motor 2 can rotate forward and reverse. One end of the worm wheel 22 is meshed with the worm 21 for transmission, and the other end is formed with a linkage gear 221. The linkage gear 221 is meshed with the input end of the gear set for transmission, and an output gear 25 is provided at the output end of the gear set.

[0043] The gear set includes a first double gear 23, a second double gear 24 and an output gear 25. One end of the first double gear 23 is meshed with the linkage gear of the worm gear 22 for transmission. One end of the output gear 25 is formed with a cylindrical tooth 251, and the other end is formed with a second bevel tooth 252. The cylindrical tooth 251 is meshed with the second double gear 24, and the second bevel tooth 252 is meshed with the first bevel tooth 32.

[0044] like Figure 3 and Figure 4 As shown, the lock tongue 5 is rotatably disposed in the housing 1 through a rotating shaft 5b and is formed with a second lock opening 54. The second lock opening 54 cooperates with the first lock opening 15 to achieve full locking, half locking and opening. The lock tongue 5 has a first abutment portion 52 and a second abutment portion 51 adjacent to the first abutment portion 52; the first spring 5a is disposed in the second base 11 for resetting the lock tongue 5.

[0045] The stopper 4 is rotatably disposed in the housing 1 via a rotating shaft 4 b and has a first stopper 42 and a second stopper 41 ; a second spring 4 a is disposed in the second base 11 for resetting the stopper 4 .

[0046] The shift fork 3 is rotatably disposed in the housing 1 via a rotating shaft 3 b and has a first bevel tooth 32 formed at one end thereof for meshing and transmitting with the output gear 25 . The first bevel tooth 32 is obliquely arranged on the shift fork 3 .

[0047] A first microswitch 61, a second microswitch 62 and a third microswitch 63 are provided in the shell 1, all of which are connected to the control of the motor 2. The first microswitch 61 has an extended first contact head 611, and the second microswitch 62 has an extended second contact head 621. The lock tongue 5 is formed with a protrusion 53 that cooperates with the first contact head 611 and the second contact head 621 to realize forward and reverse rotation of the motor 2.

[0048] Combination Figure 3As shown, a bracket 7 is provided in the housing 1, and a first receiving groove 71, a second receiving groove 72 and an arc-shaped hole 73 close to the first receiving groove 71 and the second receiving groove 72 are provided on the bracket 7. The first micro switch 61 is provided in the first receiving groove 71 and the first contact head 611 extends toward the arc-shaped hole 73. The second micro switch 62 is provided in the second receiving groove 72 and the second contact head 621 extends toward the arc-shaped hole 73. The protrusion 53 extends upward from the arc-shaped hole 73. The rotating shaft 4b passes through the shaft hole 75 of the bracket 7, and the rotating shaft 5b passes through the shaft hole 74 of the bracket 7.

[0049] Combination Figure 6 As shown, the third micro switch 63 is arranged near the output gear 25, and the third micro switch 63 has a protruding third contact head 631. The output gear 25 is protruded with a protrusion 253 that cooperates with the third contact head 631 to realize the return of the fork 3. The stopper 4 is provided with a connecting portion that can be connected to an emergency pull rope. In this embodiment, the connecting portion is a connecting hole 43. Figure 4 .

[0050] like Figure 7 As shown, the electric lock is in the open state, the shift fork 3 is in the second position 422 of the first stop portion 42 , and at this time, the protrusion 53 abuts against the first micro switch 61 .

[0051] When closing the door, the lock tongue 5 is pressed by the lock hook 100, and the protrusion 53 is disengaged from the first micro switch 61, sending a signal to the motor 2. The motor 2 starts to move the shift fork in the direction of closing the door through a series of transmissions, and the second micro switch 62 is also disengaged. Figure 8 As shown, at this time, the electric lock is in a semi-locked state, the second stop portion 41 abuts against the first abutting portion 52 , and the shift fork 3 is in the first position 421 of the first stop portion 42 .

[0052] The shift fork 3 continues to move the lock tongue 5, and the lock tongue 5 stops moving when the protrusion 53 abuts against the second micro switch 62. Fig. 9 As shown, the electric lock is in a completely locked state, the second stopper 41 abuts against the second abutting portion 51, restricting the rotation of the lock tongue 5, the protrusion 253 abuts against the third micro switch 63, and the motor 2 drives the fork 3 to return to the initial position. If an emergency occurs at this time, the emergency pull rope can be pulled to make the block 4 contact the limit of the lock tongue to open the electric lock.

[0053] When unlocking, the motor receives the signal and drives the fork 3 to move in the unlocking direction, and the protrusion 253 is disengaged from the third micro switch 63. The lock tongue 5 rebounds to the fully open position due to the first spring 5a until the protrusion 53 presses the first micro switch 61, and the motor 2 stops running.

[0054] Embodiment 2, as Fig.10 and Fig.11As shown, in this embodiment, a shift block 8 capable of acting on the stopper 4 is rotatably provided in the housing 1 through an axle pin 82, and a shift rod 81 extending out of a through hole 141 of the housing is provided on the shift block 8, and the through hole 141 is arc-shaped. When the shift rod 81 is pulled, the stopper 4 can be caused to rotate and thus release the blocking of the lock tongue 3, thereby realizing emergency unlocking. For other structures, refer to Embodiment 1.

Claims

1. An electric suction lock, characterized in that include The housing (1) has an internal space and a first locking opening (15) for the locking hook to be inserted into the bottom; A driving mechanism is arranged on the housing (1), the driving mechanism comprising a motor (2), a worm (21), a worm wheel (22) and a gear set, the worm (21) being arranged at the power output end of the motor (2), the motor (2) being capable of forward and reverse rotation, one end of the worm wheel (22) meshing with the worm (21) for transmission, and the other end of the worm wheel (22) being formed with a linkage gear (221), the linkage gear (221) being meshing with the input end of the gear set for transmission, and an output gear (25) being arranged at the output end of the gear set; A lock tongue (5) is rotatably disposed in the housing (1) and is formed with a second lock opening (54). The second lock opening (54) cooperates with the first lock opening (15) to achieve full locking, half locking and opening. The lock tongue (5) has a first abutting portion (52) and a second abutting portion (51) adjacent to the first abutting portion (52); A first spring (5a) is disposed in the housing (1) and is used for resetting the locking tongue (5); A stopper (4) is rotatably disposed in the housing (1) and comprises a first stopper (42) and a second stopper (41); a second spring (4a), disposed in the housing (1) and used for resetting the stopper (4); and A shift fork (3) is rotatably disposed in the housing (1) and has a first bevel tooth (32) formed at one end thereof for meshing with the output gear (25) for transmission. The first bevel tooth (32) is obliquely arranged on the shift fork (3); When the electric lock is in a completely locked state, the second stopper (41) and the second abutment portion (51) abut against each other, thereby limiting the rotation of the lock tongue (5); When the electric lock is in a semi-locked state, the second stopper (41) abuts against the first abutting portion (52), and the shift fork (3) is in the first position (421) of the first stopper (42); When the electric suction lock is in an open state, the shift fork (3) is in the second position (422) of the first stop portion (42); The housing (1) has a first accommodating chamber (1a) and a second accommodating chamber (2a); the worm wheel (22) and the gear set are arranged in the first accommodating chamber (1a); the locking tongue (5), the stopper (4) and the shift fork (3) are arranged in the second accommodating chamber (2a); the plane where the first accommodating chamber (1a) is located intersects with the plane of the second accommodating chamber (2a) at an obtuse angle; The gear set comprises a first double gear (23), a second double gear (24) and an output gear (25); one end of the first double gear (23) is meshed with the linkage gear of the worm gear (22) for transmission; one end of the output gear (25) is formed with a cylindrical tooth (251) and the other end is formed with a second bevel tooth (252); the cylindrical tooth (251) is meshed with the second double gear (24), and the second bevel tooth (252) is meshed with the first bevel tooth (32).

2. The electric lock according to claim 1, characterized in that The housing (1) is provided with a first micro switch (61) and a second micro switch (62) both of which are control-connected to the motor (2); the first micro switch (61) has a protruding first contact head (611); the second micro switch (62) has a protruding second contact head (621); the lock tongue (5) is formed with a first convex point that cooperates with the first contact head (611) to realize forward rotation of the motor (2); and a second convex point that cooperates with the second contact head (621) to realize reverse rotation of the motor (2).

3. The electric suction lock according to claim 2, characterized in that The first protrusion and the second protrusion are an integral part.

4. The electric suction lock according to claim 2, characterized in that The housing (1) is provided with a bracket (7), the bracket (7) being provided with a first receiving groove (71), a second receiving groove (72) and an arc-shaped hole (73) close to the first receiving groove (71) and the second receiving groove (72); the first micro switch (61) is arranged in the first receiving groove (71) and the first contact head (611) extends toward the arc-shaped hole (73); the second micro switch (62) is arranged in the second receiving groove (72) and the second contact head (621) extends toward the arc-shaped hole (73); and the first convex point and the second convex point extend upward out of the arc-shaped hole (73).

5. The electric lock according to claim 1, characterized in that A third micro switch (63) connected to the motor (2) for control is provided in the housing (1) near the output gear (25), and the third micro switch (63) has a protruding third contact head (631). Correspondingly, a protrusion (253) is provided on the output gear (25) for cooperating with the third contact head (631) to realize the return of the shift fork (3), and a connection portion capable of being connected to an emergency pull rope is provided on the stop block (4).

6. The electric lock according to claim 1, characterized in that The housing (1) is provided with a shift block (8) capable of acting on the stopper (4), and the shift block (8) is provided with a shift rod (81) extending out of the housing. When the shift rod (81) is pulled, the stopper (4) can be driven to rotate, thereby releasing the restriction on the lock tongue (3).

Images