Electronic lock and cam gear

Abstract

According to the electronic lock, one end of a spiral spring is matched with a lower shell, the other end of the spiral spring is assembled and connected to the tail end of an unlocking pull rod, it is guaranteed that the initial position of an unlocking rod is fixed relative to the lower shell through the spiral spring, the automatic reset effect of the unlocking rod is achieved, the normal emergency unlocking function is kept, and meanwhile the safety of the unlocking rod is improved. The unlocking rod can be automatically reset after emergency unlocking is completed; besides, in the unlocking process of normal driving of the motor, the position of the unlocking rod is kept unchanged, the unlocking rod cannot move along with the gear transmission mechanism, and the service life of the emergency unlocking mechanism can be prolonged; the inner cam groove in the cam shaft of the cam gear drives the locking connecting rod of the locking piece, circular motion of the gear set can be converted into linear motion of the locking piece, locking and unlocking actions of the electronic lock are achieved, and the upper locking rod can obtain larger ejection force. The invention further discloses the cam gear.

Description

TECHNICAL FIELD

[0001] The present application relates to a lock, in particular to an electronic lock and a cam gear. BACKGROUND

[0002] The electronic lock of the automobile charging gun is mainly applied to the following aspects: in the automobile charging process, the lock rod is extended through the transmission mechanism to lock the charging gun, so as to prevent the charging gun from being pulled out by external force before the charging is completed; and after the charging is completed, the lock rod is retracted to complete unlocking, so that the charging gun can be smoothly pulled out. Meanwhile, in order to prevent the electronic lock from being unable to normally unlock after being locked due to difficulties, an emergency unlocking function needs to be added.

[0003] The emergency unlocking mechanism of the existing common electronic lock moves together when unlocking, which increases the wear of the emergency unlocking mechanism, requires a high service life of the emergency unlocking mechanism, and makes the feedback of the emergency unlocking signal complex.

[0004] In addition, after the rotary motion of the motor is converted into linear motion, the existing common electronic lock makes the ejection force of the final position of the lock rod too small, which may cause the unlocking to fail due to the inability to break the ice at low temperature, resulting in a functional failure.

[0005] In addition, the electronic lock of the charging gun is powered off after locking is completed, and the holding force of the lock rod of the existing common electronic lock of the charging gun is generally small, which may cause the lock rod to be pushed back by external force, so that the charging gun cannot be locked and the charging gun can be pulled out, which has a risk of use safety.

[0006] In addition, there are various vehicles on the market, and the signal requirements of the electronic lock of each vehicle are different. Some customers want on-off signals, some want different resistance signals, and the signal conversion positions are also different. Most of the existing electronic locks on the market need to be newly designed according to different customers and vehicle models, which may cause high cost and loss of competitiveness. SUMMARY

[0007] The technical problem to be solved by the present application is to provide an electronic lock which can automatically reset the unlocking rod after emergency unlocking is completed, and the service life of the emergency unlocking mechanism is long and the ejection force of the locking rod is large.

[0008] To solve the above technical problems, the electronic lock provided by the present application comprises a cam gear 7, an unlocking rod 9, a locking member 8, a spiral spring 3 and a lower shell 13.

[0009] The cam gear 7 comprises a cam shaft 70 and a head gear 71.

[0010] The cam shaft 70 is formed with a spiral inner cam groove 72 and a spiral outer cam rib 73 coaxial with the cam shaft 70.

[0011] The inner cam groove 72 is recessed from the body cylindrical surface of the cam shaft 70 towards the axis;

[0012] The outer cam rib 73 is protruded from the body cylindrical surface of the cam shaft 70 away from the axis;

[0013] The head gear 71 is coaxially fixed on the head of the cam shaft 70;

[0014] The locking member 8 comprises an upper locking rod 80 and an upper locking link 81;

[0015] The tail end of the upper locking link 81 is perpendicularly fixed on the head end of the upper locking rod 80;

[0016] The head end of the upper locking link 81 is placed in the inner cam groove 72;

[0017] The tail end of the upper locking rod 80 is located on the side of the upper locking link 81 away from the head gear 71, and the axis of the upper locking rod 80 is parallel to the axis of the cam shaft 70;

[0018] The unlocking member 9 comprises an unlocking pull rod 90 and an unlocking link 91;

[0019] The tail end of the unlocking link 91 is perpendicularly fixed on the head end of the unlocking pull rod 90;

[0020] The head end of the unlocking link 91 is placed on the side of the outer cam rib 73 away from the head gear 71;

[0021] One end of the coil spring 3 is fitted to the lower housing 13, and the other end abuts against the tail end of the unlocking pull rod 90;

[0022] The output shaft of the motor 4 drives the head gear 71 through a gear transmission mechanism to drive the cam gear 7 to rotate;

[0023] In the unlocking state, if the cam gear 7 rotates forward, the head end of the upper locking link 81 will be driven by the inner cam groove 72 to move away from the head gear 71, thereby driving the upper locking rod 80 to move away from the head gear 71 into the locking position and enter the locking state;

[0024] In the locking state, when the unlocking link 91 moves towards the head gear 71 to press against the outer cam rib 73 to reverse the cam gear 7, or the motor drives the cam gear 7 to reverse, the upper locking link 81 will be driven by the inner cam groove 72 to move towards the head gear 71, thereby driving the upper locking rod 80 to move towards the head gear 71 into the unlocking position and enter the unlocking state;

[0025] When the unlocking pull rod 90 is subjected to external force to move the unlocking link 91 towards the head gear 71, the coil spring 3 is compressed and deformed;

[0026] When the external force on the unlocking pull rod 90 disappears, the compression deformation force of the coil spring 3 moves the unlocking link 91 away from the head gear 71, and the unlocking rod 9 is reset.

[0027] Preferably, the tail end of the unlocking pull rod 90 is located on the side of the locking link 81 close to the head gear 71, and the axis of the locking rod 80 is parallel to the axis of the cam shaft 70.

[0028] Preferably, the electronic lock further comprises an emergency pull rod 2.

[0029] The coil spring 3 is sleeved outside the emergency pull rod 2, one end abuts against the inside of the side wall of the lower housing 13, and the other end abuts against the tail end of the unlocking pull rod 90; when the unlocking pull rod 90 is not subjected to external force, the coil spring 3 is in compression deformation.

[0030] The emergency pull rod 2 passes through the hole in the side wall of the lower housing 13, one end protrudes out of the lower housing 13, and the other end is fixedly connected to the tail end of the unlocking pull rod 90.

[0031] Preferably, the coil spring 3 is sleeved outside the emergency pull rod 2, one end abuts against the inside of the side wall of the lower housing 13, and the other end abuts against the tail end of the unlocking pull rod 90 fixedly connected to the limiting block 92.

[0032] The emergency pull rod 2 passes through the hole in the side wall of the lower housing 13, one end protrudes out of the lower housing 13, and the other end is fixedly connected to the tail end of the unlocking pull rod 90 fixedly connected to the limiting block 92.

[0033] Preferably, a limiting groove is formed in the middle of the emergency pull rod 2 in the circumferential direction, and a sealing ring 21 is embedded in the limiting groove, the outer diameter of the sealing ring 21 being greater than the outer diameter of the emergency pull rod 2 and less than the inner diameter of the coil spring 3.

[0034] When the unlocking pull rod 90 is not subjected to external force, the compression deformation of the coil spring 3 causes the sealing ring 21 to press against the hole to achieve sealing.

[0035] Preferably, a spring fixing tube 136 with an inner diameter greater than the hole is formed around the hole on the inside of the side wall of the lower housing 13, and one end of the coil spring 3 protrudes into the spring fixing tube 136 and abuts against the inside of the side wall of the lower housing 13.

[0036] Preferably, the helix angle of the outer cam rib 73 is greater than the helix angle of the inner cam groove 72.

[0037] Preferably, the surface of the unlocking link 91 that contacts the outer cam rib 73 is an arc surface.

[0038] Preferably, the gear transmission mechanism comprises a motor gear 41, a first double gear 5, and a second double gear 6.

[0039] The first double gear 5 and the second double gear 6 each comprise a driving gear and a driven gear coaxially fixed together;

[0040] The cam gear 7, the locking connecting rod 81 of the locking member 8, the unlocking rod 9, the spiral spring 3, the motor gear 41, the first double gear 5 and the second double gear 6 are arranged in the lower shell 13;

[0041] The locking rod 80 of the locking member 8 penetrates the side wall of the lower shell 13;

[0042] The motor 4 is arranged in the limiting groove of the lower shell 13;

[0043] The motor gear 41 is fixedly connected to the output shaft of the motor 4;

[0044] The driving gear of the first double gear 5 is engaged with the motor gear 41;

[0045] The driving gear of the second double gear 6 is engaged with the driven gear of the first double gear 5;

[0046] The driven gear of the second double gear 6 is engaged with the head gear 71 of the cam gear 7;

[0047] The transmission ratio of the gear transmission mechanism is greater than 10:1.

[0048] Preferably, the gear number ratio of the motor gear 41, the driving gear of the first double gear 5, the driven gear of the first double gear 5, the driving gear of the second double gear 6, the driven gear of the second double gear 6 and the head gear 71 is 10:17:10:28:10:24.

[0049] Preferably, the spiral inner cam groove 72 of the camshaft 70 is communicated with a self-locking groove 721 at the end away from the head gear 71;

[0050] The self-locking groove 721 is communicated with the inner cam groove 72 at one lateral side, and is formed with a vertical wall at the other lateral side, and is formed with an upper side wall connected with the inner cam groove 72 at the vertical upper side, and is formed with a lower side wall connected with the inner cam groove 72 at the vertical lower side;

[0051] The locking rod 80 and the locking connecting rod 81 of the locking member 8 are perpendicular to the lower side wall and the upper side wall of the self-locking groove 721;

[0052] In the unlocking state, the head end of the locking connecting rod 81 is arranged in the inner cam groove 72, and if the cam gear 7 rotates in the forward direction, the head end of the locking connecting rod 81 will be driven away from the head gear 71 in the inner cam groove 72, so as to drive the locking rod 80 away from the head gear 71 to enter the locking position and enter the locking state;

[0053] Unlocking state, when the cam gear 7 rotates forward and drives the head end of the locking link 81 to move away from the head gear 71 into the self-locking groove 721, the locking rod 80 is driven into the locking position, the head of the locking link 81 will abut against the vertical wall of the self-locking groove 721 to limit the continuous forward rotation of the cam gear 7, and enter the locking state;

[0054] Locking state, if the cam gear 7 reverses, the head end of the locking link 81 will enter the inner cam groove 72 and move towards the head gear 71 under the driving of the inner cam groove 72, thereby driving the locking rod 80 into the unlocking position and entering the unlocking state.

[0055] Preferably, the electronic lock is a charging gun electronic lock.

[0056] Preferably, the electronic lock further comprises a sliding claw 11 and a circuit board 12.

[0057] The sliding claw and the circuit board are arranged inside the lower shell 13.

[0058] The sliding claw is fixedly assembled on the locking rod 80 at one end and cooperates with the contact track on the circuit board at the other end.

[0059] A plurality of pairs of control signal contact pads are arranged on the contact track.

[0060] Preferably, one end of the sliding claw is fixedly assembled on the locking rod 80 through a fixed groove.

[0061] The lower shell 13 is fixed with a signal metal terminal 131 and a power metal terminal 133 by insert molding.

[0062] Each pair of control signal contact pads of the circuit board is short-circuited with the signal metal terminal 131 of the lower shell respectively, for outputting different position signals.

[0063] The power metal terminal 133 is used for short-circuiting to the power input end of the motor and externally connecting the working power source through a connector 135.

[0064] Preferably, the electronic lock further comprises an upper shell, and the upper shell 14 covers the lower shell 13.

[0065] The electronic lock of the present application, one end of the spiral spring 3 is matched with the lower shell 13, and the other end is assembled to the tail end of the unlocking pull rod 90, the spiral spring 3 ensures that the initial position of the unlocking rod 9 is fixed relative to the lower shell 13, plays the role of automatic reset of the unlocking rod 9, and can automatically reset the unlocking rod 9 after the emergency unlocking is completed while maintaining the normal emergency unlocking function. In addition, during the normal driving of the motor to unlock, the position of the unlocking rod 9 remains unchanged and does not move together with the gear transmission mechanism, which can prolong the service life of the emergency unlocking mechanism. The inner cam groove 72 on the cam shaft 70 of the cam gear 7 drives the locking connecting rod 81 of the locking piece 8, can convert the circular motion of the gear set into the linear motion of the locking piece 8, and realizes the unlocking action of the electronic lock. Because the head gear 71 of the cam gear 7, the cam shaft 70 and the spiral inner cam groove 72 and the spiral outer cam rib 73 thereon are coaxial, the cam gear 7 can output greater torque during rotation, and because the locking connecting rod 81 is very close to the axis, when converted into linear motion, the locking rod 80 can obtain greater ejection force compared with the traditional gear and rack structure. BRIEF DESCRIPTION OF DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of the present application, the following briefly introduces the drawings needed to be used by the present application. Obviously, the drawings described in the following are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0067] Figure 1 is an exploded view of an embodiment of the electronic lock of the present application;

[0068] Figure 2 is a perspective view of the cam gear of an embodiment of the electronic lock of the present application;

[0069] Figure 3 is a schematic view of the assembly structure of the locking piece and the cam gear of an embodiment of the electronic lock of the present application;

[0070] Figure 4 is a schematic view of the locking state of an embodiment of the electronic lock of the present application;

[0071] Figure 5 is a schematic view of the unlocking state of an embodiment of the electronic lock of the present application;

[0072] Figure 6 is a schematic view of the emergency unlocking state of an embodiment of the electronic lock of the present application by pulling the unlocking pull rod;

[0073] Figure 7 is a schematic view of the gear transmission mechanism of an embodiment of the electronic lock of the present application;

[0074] Figure 8is a schematic diagram of the self-locking position of the locking lever of an embodiment of the electronic lock of the present application;

[0075] Figure 9 is a schematic diagram of the circuit board of an embodiment of the electronic lock of the present application;

[0076] Figure 10 is a top view of the lower shell of an embodiment of the electronic lock of the present application;

[0077] Figure 11 is a schematic diagram of the overall assembly of an embodiment of the electronic lock of the present application.

[0078] Legend of reference signs:

[0079] 13 lower shell; 136 spring fixing tube; 14 upper shell; 7 cam gear; 70 cam shaft; 71 head gear; 72 inner cam groove; 721 self-locking groove; 73 outer cam rib; 8 locking member; 80 locking lever; 81 locking connecting rod; 9 unlocking lever; 90 unlocking pull rod; 91 unlocking connecting rod; 92 limiting block; 3 coil spring; 4 motor; 2 emergency pull rod; 21 sealing ring; 136 spring fixing tube; 41 motor gear; 5 first double gear; 6 second double gear; 11 sliding claw; 12 circuit board; 121 control signal contact pad; 131 signal metal terminal; 133 power metal terminal; 135 connector. DETAILED DESCRIPTION

[0080] The technical solutions in the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0081] Embodiment one

[0082] As shown in Figure 1 , an electronic lock comprises a cam gear 7, an unlocking lever 9, a locking member 8, a coil spring 3 and a lower shell 13;

[0083] As shown in Figure 2 , the cam gear 7 comprises a cam shaft 70 and a head gear 71;

[0084] The cam shaft 70 is formed with a helical inner cam groove 72 and a helical outer cam rib 73 coaxial with the cam shaft 70;

[0085] The inner cam groove 72 is recessed from the body cylindrical surface of the cam shaft 70 towards the axis;

[0086] The outer cam rib 73 is protruded from the body cylindrical surface of the cam shaft 70 away from the axis;

[0087] The head gear 71 is coaxially fixed on the head of the cam shaft 70;

[0088] As shown in the drawings, the locking member 8 comprises an upper locking rod 80 and an upper locking connecting rod 81; Figure 3

[0089] The tail end of the upper locking connecting rod 81 is vertically fixed on the head end of the upper locking rod 80;

[0090] The head end of the upper locking connecting rod 81 is placed in the inner cam groove 72;

[0091] The tail end of the upper locking rod 80 is located on the side of the upper locking connecting rod 81 away from the head gear 71, and the axis of the upper locking rod 80 is parallel to the axis of the cam shaft 70;

[0092] The unlocking rod 9 comprises an unlocking pull rod 90 and an unlocking connecting rod 91;

[0093] The tail end of the unlocking connecting rod 91 is vertically fixed on the head end of the unlocking pull rod 90;

[0094] The head end of the unlocking connecting rod 91 is placed on the side of the outer cam rib 73 away from the head gear 71;

[0095] One end of the spiral spring 3 is fitted to the lower housing 13, and the other end abuts against the tail end of the unlocking pull rod 90;

[0096] The output shaft of the motor 4 drives the head gear 71 through a gear transmission mechanism to drive the cam gear 7 to rotate;

[0097] In the unlocking state, if the cam gear 7 rotates in the forward direction, the head end of the upper locking connecting rod 81 will be driven by the inner cam groove 72 to move away from the head gear 71, thereby driving the upper locking rod 80 to move away from the head gear 71 into the locking position and enter the locking state, as shown in the drawings; Figure 4

[0098] In the locking state, when the unlocking connecting rod 91 moves towards the head gear 71 to press against the outer cam rib 73 to reverse the cam gear 7, or the motor drives the cam gear 7 to reverse, the upper locking connecting rod 81 will move towards the head gear 71 under the drive of the inner cam groove 72, thereby driving the upper locking rod 80 to move towards the head gear 71 into the unlocking position and enter the unlocking state, as shown in the drawings; Figure 5

[0099] When the unlocking pull rod 90 is subjected to an external force to move the unlocking connecting rod 91 towards the head gear 71, the spiral spring 3 is compressed and deformed, as shown in the drawings; Figure 6

[0100] When the external force acting on the unlocking pull rod 90 disappears, the compression deformation force of the spiral spring 3 moves the unlocking connecting rod 91 away from the head gear 71, so that the unlocking rod 9 is reset, as shown in the drawings; Figure 4 ,​​​​Figure 5 The electronic lock is shown in the figure.

[0101] Preferably, the tail end of the unlocking pull rod 90 is located on the side of the head gear 71 of the upper locking link 81, and the axis of the upper locking rod 80 is parallel to the axis of the cam shaft 70.

[0102] In the electronic lock of the first embodiment, one end of the coil spring 3 is matched with the lower housing 13, and the other end is assembled to the tail end of the unlocking pull rod 90. The coil spring 3 ensures that the initial position of the unlocking rod 9 is fixed relative to the lower housing 13, and plays a role in automatic resetting of the unlocking rod 9. While maintaining the normal emergency unlocking function, the unlocking rod 9 can be automatically reset after the emergency unlocking is completed. In addition, during the normal driving of the motor to unlock, the position of the unlocking rod 9 remains unchanged and does not move with the gear transmission mechanism, which can prolong the service life of the emergency unlocking mechanism.

[0103] In the electronic lock of the first embodiment, the inner cam groove 72 on the cam shaft 70 of the cam gear 7 drives the upper locking link 81 of the locking piece 8, which can convert the circular motion of the gear set into linear motion of the locking piece 8, and realize the upper unlocking action of the electronic lock. Because the head gear 71 of the cam gear 7, the cam shaft 70, and the spiral inner cam groove 72 and the spiral outer cam rib 73 thereon are coaxial, the cam gear 7 can output greater torque during rotation. Moreover, because the upper locking link 81 is very close to the axis, it can obtain greater ejection force when converted into linear motion, compared with the traditional gear and rack structure.

[0104] Embodiment two

[0105] Based on the first embodiment, the electronic lock further comprises an emergency pull rod 2.

[0106] The coil spring 3 is sleeved outside the emergency pull rod 2, one end is abutted to the inner side of the side wall of the lower housing 13, and the other end is abutted to the tail end of the unlocking pull rod 90; when the unlocking pull rod 90 is not subjected to external force, the coil spring 3 is in compression deformation.

[0107] The emergency pull rod 2 passes through the hole in the side wall of the lower housing 13, one end protrudes out of the lower housing 13, and the other end is fixedly connected to the tail end of the unlocking pull rod 90.

[0108] Preferably, the coil spring 3 is sleeved outside the emergency pull rod 2, one end is abutted to the inner side of the side wall of the lower housing 13, and the other end is abutted to the fixed limiting block 92 at the tail end of the unlocking pull rod 90.

[0109] The emergency pull rod 2 passes through the hole in the side wall of the lower housing 13, one end protrudes out of the lower housing 13, and the other end is fixedly connected to the fixed limiting block 92 at the tail end of the unlocking pull rod 90.

[0110] Preferably, a limiting groove is formed in the circumferential direction at the middle position of the emergency pull rod 2, and a sealing ring 21 is embedded in the limiting groove, the outer diameter of the sealing ring 21 is greater than the outer diameter of the emergency pull rod 2 and less than the inner diameter of the coil spring 3.

[0111] When the unlocking pull rod 90 is not subjected to external force, the compression deformation of the coil spring 3 causes the sealing ring 21 to press against the hole to achieve sealing, thereby achieving waterproof effect.

[0112] Preferably, a spring fixing tube 136 with an inner diameter greater than the hole is formed around the hole in the inner side of the side wall of the lower shell 13, and one end of the coil spring 3 is inserted into the spring fixing tube 136 and abuts against the inner side of the side wall of the lower shell 13.

[0113] When the emergency pull rod 2 is pulled to move outward of the lower shell 13, the emergency pull rod 2 drives the unlocking lever 9 to move and compress the coil spring 3, the unlocking connecting rod 91 of the unlocking lever 9 slides along the side of the outer cam rib 73 of the cam gear 7 away from the head gear 71, causing the cam gear 7 to rotate, the inner cam line 72 of the cam gear 7 drives the upper locking connecting rod 81 of the locking piece 8 to move the upper locking lever 80 toward the head gear 71 into the unlocking position, thereby entering the unlocking state and achieving the unlocking function. When the unlocking is completed, the compression deformation force of the coil spring 3 drives the unlocking connecting rod 91 of the unlocking lever 9 to move away from the outer cam rib 73 of the cam gear 7, thereby achieving the self-resetting function of the emergency unlocking mechanism.

[0114] Embodiment Three

[0115] Based on the electronic lock of embodiment one, the helix angle of the outer cam rib 73 is greater than the helix angle of the inner cam groove 72, so that the upper locking lever 80 of the locking piece 8 can obtain greater upper locking ejection force and faster emergency unlocking speed.

[0116] Preferably, the surface of the unlocking connecting rod 91 in contact with the outer cam rib 73 is an arc surface.

[0117] Embodiment Four

[0118] Based on the electronic lock of embodiment one, as shown in the drawings, the gear transmission mechanism includes a motor gear 41, a first double gear 5 and a second double gear 6. Figure 7

[0119] The first double gear 5 and the second double gear 6 each include a driving gear and a driven gear fixed coaxially together.

[0120] The cam gear 7, the upper locking connecting rod 81 of the locking piece 8, the unlocking lever 9, the coil spring 3, the motor gear 41, the first double gear 5 and the second double gear 6 are all arranged in the lower shell 13, as shown in the drawings. Figure 11

[0121] ​​The locking rod 80 of the locking member 8 penetrates the side wall of the lower shell 13;

[0122] The motor 4 is arranged in the limiting groove of the lower shell 13;

[0123] The motor gear 41 is fixedly connected to the output shaft of the motor 4;

[0124] The driving gear of the first double gear 5 is engaged with the motor gear 41;

[0125] The driving gear of the second double gear 6 is engaged with the driven gear of the first double gear 5;

[0126] The driven gear of the second double gear 6 is engaged with the head gear 71 of the cam gear 7;

[0127] The transmission ratio of the gear transmission mechanism is greater than 10:1.

[0128] Preferably, the gear number ratio of the motor gear 41, the driving gear of the first double gear 5, the driven gear of the first double gear 5, the driving gear of the second double gear 6, the driven gear of the second double gear 6, and the head gear 71 is 10:17:10:28:10:24.

[0129] In the electronic lock of the fourth embodiment, the motor 4 drives the first double gear 5 through the motor gear 41 assembled thereon, and then drives the second double gear 6 through the first double gear 5, and the second double gear 6 drives the head gear 71 to rotate the cam gear 7, thereby forming a set of gear transmission mechanism, and when the rotation of the motor is converted into the linear motion of the locking rod 80 of the locking member 8, the motor still has a large ejection force, and the output torque is increased and the rotation speed is reduced.

[0130] Fifth Embodiment

[0131] Based on the electronic lock of the first embodiment, as shown in Figure 8 The far end of the spiral inner cam groove 72 of the camshaft 70 is communicated with a self-locking groove 721;

[0132] The self-locking groove 721 is communicated with the inner cam groove 72 at one lateral side, and a vertical wall is formed at the other lateral side, and an upper side wall connected with the inner cam groove 72 is formed at the vertical upper side, and a lower side wall connected with the inner cam groove 72 is formed at the vertical lower side;

[0133] The locking rod 80 and the locking connecting rod 81 of the locking member 8 are perpendicular to the lower side wall and the upper side wall of the self-locking groove 721;

[0134] In the unlocked state, the head end of the locking link 81 is placed in the inner cam groove 72. If the cam gear 7 rotates forward, the head end of the locking link 81 will be driven away from the head gear 71 by the inner cam groove 72, thereby driving the locking rod 80 away from the head gear 71 and entering the locked position, entering the locked state;

[0135] In the unlocked state, when the cam gear 7 rotates forward and drives the head end of the locking link 81 to move away from the head gear 71 and enter the self-locking groove 721, the locking rod 80 is driven into the locked position, and the head of the locking link 81 abuts against the vertical wall of the self-locking groove 721, thereby restricting the cam gear 7 from continuing to rotate forward, and entering the locked state;

[0136] In the locked state, if the cam gear 7 is reversed, the head end of the locking link 81 will enter the inner cam groove 72 and move toward the head gear 71 driven by the inner cam groove 72, thereby driving the locking rod 80 to enter the unlocked position and enter the unlocked state.

[0137] Preferably, the electronic lock is a charging gun electronic lock, which can be used for new energy vehicles or charging piles. The high top output of the locking rod 80 of the electronic lock can stably and reliably lock the charging gun and ensure that the charging gun cannot be pulled out, preventing leakage or theft, and avoiding safety hazards.

[0138] In the electronic lock of Example 5, when the locking rod 80 reaches the locked position, the electronic lock drive system will be powered off. If an external force pushes the locking rod 80 to move toward the head gear 71, the locking link 81 will contact the lateral side wall of the self-locking groove 721 of the cam gear 7. Since the lateral side wall of the self-locking groove 721 is perpendicular to the locking rod 80 and the locking link 81, no component force in the rotation direction is generated, and the cam gear 7 will not rotate. Therefore, the locking rod 8 will not be pushed toward the head gear 71, preventing the locking rod 80 from retreating, forming self-locking, thereby preventing the electronic lock from being unlocked due to misoperation.

[0139] Example 6

[0140] Based on Example 5, Figure 1 As shown, the electronic lock further includes a sliding claw 11 and a circuit board 12;

[0141] The sliding claw and the circuit board are arranged inside the lower housing 13;

[0142] like Figure 9 As shown, one end of the sliding claw 11 is fixedly assembled on the locking rod 80, and the other end cooperates with the contact track on the circuit board;

[0143] A plurality of pairs of control signal contact pads 121 are provided on the contact track.

[0144] Preferably, one end of the sliding claw is fixedly assembled on the upper locking rod 80 through a fixing groove.

[0145] The lower shell 13 is fixed with a signal metal terminal 131 and a power metal terminal 133 through insert injection molding.

[0146] Each pair of control signal contact pads of the circuit board is short-circuited with the signal metal terminal 131 of the lower shell, for outputting different position signals; when the sliding claw 11 slides on the contact track on the circuit board 12, the position signals corresponding to the positions of each pair of control signal contact pads can be outputted, realizing customizable design.

[0147] The power metal terminal 133 is used for short-circuiting to the power input end of the motor, and the working power is externally connected through the connector 135.

[0148] Preferably, the electronic lock further comprises an upper shell, and the upper shell 14 covers the lower shell 13.

[0149] In the normal working state of the electronic lock of embodiment seven, the motor is energized, and the motor drives the forward movement and the backward movement of the upper locking rod 80 through the gear transmission mechanism, the cam gear 7, and the upper locking rod 80 after the change of direction. The forward rotation and the reverse rotation of the motor control the locking and the unlocking of the upper locking rod 80, and the upper locking rod 80 simultaneously drives the sliding claw 11 to slide on the circuit board, and outputs different signals to the processor at different positions. After the charging is completed, the emergency pull rod 2 and the unlocking pull rod 90 fixedly connected thereto can be manually pulled, the cam gear 7 is driven to rotate, and the upper locking rod 80 moves toward the head gear 71 under the action of the rotation of the cam gear 7, and drives the sliding claw 11 to slide on the circuit board, and outputs different signals to the processor at different positions.

[0150] If the electronic lock is a charging gun electronic lock of a new energy vehicle, the processor is a processor of the new energy vehicle, and the locking and unlocking positions of the upper locking rod 80 can be recognized by using corresponding signals, so that the charging and power-off functions of the vehicle are realized; or whether the upper locking rod 80 reaches the unlocking position can be recognized by using corresponding signals (such as an unlocking-in-progress signal and an unlocking-completion signal), so that the charging gun can be smoothly pulled out after the emergency unlocking action is completed.

[0151] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electronic lock, characterized in that: It comprises a cam gear (7), an unlocking lever (9), a locking member (8), a coil spring (3) and a lower housing (13); The cam gear (7) includes a cam shaft (70) and a head gear (71); The camshaft (70) is formed with a spiral inner cam groove (72) and a spiral outer cam rib (73) coaxial with the camshaft; The inner cam groove (72) is recessed from the cam shaft (70) body column toward the axis side; The outer cam rib (73) protrudes from the camshaft (70) body column toward the side away from the axis; The head gear (71) is coaxially fixed to the head of the camshaft (70); The locking member (8) comprises a locking rod (80) and a locking connecting rod (81); The tail end of the locking link (81) is vertically fixed to the head end of the locking rod (80); The head end of the locking link (81) is placed in the inner cam groove (72); The tail end of the locking rod (80) is located on the side of the locking link (81) away from the head gear (71), and the axis of the locking rod (80) is parallel to the axis of the cam shaft (70); The unlocking lever (9) comprises an unlocking pull rod (90) and an unlocking connecting rod (91); The tail end of the unlocking connecting rod (91) is vertically fixed to the head end of the unlocking pull rod (90); The head end of the unlocking link (91) is placed on the side of the outer cam rib (73) away from the head gear (71); The coil spring (3) has one end assembled to the lower housing (13) and the other end abuts against the rear end of the unlocking pull rod (90); The output shaft of the motor (4) drives the head gear (71) through the gear transmission mechanism to drive the cam gear (7) to rotate; In the unlocked state, if the cam gear (7) rotates forward, the head end of the locking link (81) will be driven away from the head gear (71) by the inner cam groove (72), thereby driving the locking rod (80) away from the head gear (71) and entering the locked position, thus entering the locked state; In the locked state, when the unlocking link (91) moves toward the head gear (71) and presses against the outer cam rib (73) to reverse the cam gear (7), or the motor drives the cam gear (7) to reverse, the locking link (81) moves toward the head gear (71) driven by the inner cam groove (72), thereby driving the locking rod (80) to move toward the head gear (71) into the unlocked position, entering the unlocked state; When the unlocking pull rod (90) is subjected to an external force, the unlocking link (91) moves toward the head gear (71), and the compression coil spring (3) is compressed and deformed; When the external force acting on the unlocking pull rod (90) disappears, the compression deformation force of the coil spring (3) causes the unlocking link (91) to move away from the head gear (71), thereby resetting the unlocking rod (9).

2. The electronic lock according to claim 1, characterized in that: The rear end of the unlocking pull rod (90) is located on the side of the locking connecting rod (81) close to the head gear (71), and the axis of the locking rod (80) is parallel to the axis of the cam shaft (70).

3. The electronic lock according to claim 2, characterized in that: The electronic lock further comprises an emergency pull rod (2); The coil spring (3) is sleeved outside the emergency pull rod (2), with one end abutting against the inner side of the side wall of the lower shell (13), and the other end abutting against the tail end of the unlocking pull rod (90); when the unlocking pull rod (90) is not subjected to external force, the coil spring (3) is compressed and deformed; The emergency pull rod (2) passes through the hole in the side wall of the lower shell (13), one end of which protrudes out of the lower shell (13) and the other end of which is fixedly connected to the tail end of the unlocking pull rod (90).

4. The electronic lock according to claim 3, characterized in that: The coil spring (3) is sleeved outside the emergency pull rod (2), with one end abutting against the inner side of the side wall of the lower shell (13), and the other end abutting against the limit block (92) fixed at the tail end of the unlocking pull rod (90); The emergency pull rod (2) passes through the hole in the side wall of the lower shell (13), one end of which protrudes out of the lower shell (13) and the other end of which is fixedly connected to the limit block (92) fixed at the tail end of the unlocking pull rod (90).

5. The electronic lock according to claim 3, characterized in that: A limiting groove is formed in the circumferential direction at the middle of the emergency pull rod (2), and a sealing ring (21) is embedded in the limiting groove. The outer diameter of the sealing ring (21) is larger than the outer diameter of the emergency pull rod (2) and smaller than the inner diameter of the coil spring (3); When the unlocking pull rod (90) is not subjected to external force, the compression deformation of the coil spring (3) causes the sealing ring (21) to press against the hole to achieve sealing.

6. The electronic lock according to claim 3, characterized in that: A spring fixing tube (136) having an inner diameter larger than the hole is formed around the inner side of the side wall of the lower shell (13), and one end of the coil spring (3) is inserted into the spring fixing tube (136) and abuts against the inner side of the side wall of the lower shell (13).

7. The electronic lock according to claim 1, characterized in that: The helical angle of the outer cam rib (73) is greater than the helical angle of the inner cam groove (72).

8. The electronic lock according to claim 1, characterized in that: The surface of the unlocking connecting rod (91) in contact with the outer cam rib (73) is an arc-shaped surface.

9. The electronic lock according to claim 1, characterized in that: The gear transmission mechanism includes a motor gear (41), a first double gear (5) and a second double gear (6); The first double gear (5) and the second double gear (6) each include a driving gear and a driven gear fixed together coaxially; The cam gear (7), the locking link (81) of the locking member (8), the unlocking lever (9), the coil spring (3), the motor gear (41), the first double gear (5) and the second double gear (6) are all arranged in the lower housing (13); The upper locking rod (80) of the locking member (8) passes through the side wall of the lower housing (13); The motor (4) is arranged in a limiting groove of the lower housing (13); The motor gear (41) is fixedly connected to the output shaft of the motor (4); The driving gear of the first double gear (5) is meshed with the motor gear (41); The driving gear of the second duplex gear (6) is meshed with the driven gear of the first duplex gear (5); The driven gear of the second double gear (6) is meshed with the head gear (71) of the cam gear (7); The transmission ratio of the gear transmission mechanism is greater than 10:

1.

10. The electronic lock according to claim 9, characterized in that: The gear ratio of the motor gear (41), the driving gear of the first duplex gear (5), the driven gear of the first duplex gear (5), the driving gear of the second duplex gear (6), the driven gear of the second duplex gear (6), and the head gear (71) is: 10：17：10：28：10：24。 11. The electronic lock according to claim 1, characterized in that: An end of the spiral inner cam groove (72) of the cam shaft (70) away from the head gear (71) is connected to a self-locking groove (721); The self-locking groove (721) is connected to the inner cam groove (72) on one side in the transverse direction, and is formed with a vertical wall on the other side in the transverse direction, wherein an upper side wall connected to the inner cam groove (72) is formed on the vertical upper side, and a lower side wall connected to the inner cam groove (72) is formed on the vertical lower side; The upper locking rod (80) and the upper locking connecting rod (81) of the locking member (8) are perpendicular to the lower side wall and the upper side wall of the self-locking groove (721); In the unlocked state, the head end of the locking link (81) is placed in the inner cam groove (72). If the cam gear (7) rotates in the forward direction, the head end of the locking link (81) will be driven by the inner cam groove (72) to move away from the head gear (71), thereby driving the locking rod (80) away from the head gear (71) to enter the locked position, entering the locked state; In the unlocked state, when the cam gear (7) rotates forward and drives the head end of the locking link (81) to move away from the head gear (71) and enter the self-locking groove (721), the locking rod (80) is driven into the locked position, and the head of the locking link (81) abuts against the vertical wall of the self-locking groove (721), thereby limiting the cam gear (7) from continuing to rotate forward, and entering the locked state; In the locked state, if the cam gear (7) is reversed, the head end of the locking link (81) enters the inner cam groove (72) and moves toward the head gear (71) driven by the inner cam groove (72), thereby driving the locking rod (80) to enter the unlocked position and enter the unlocked state.

12. The electronic lock according to claim 1, characterized in that: The electronic lock is a charging gun electronic lock.

13. The electronic lock according to claim 1, characterized in that: The electronic lock further comprises a sliding claw (11) and a circuit board (12); The sliding claw and the circuit board are arranged inside the lower housing (13); The sliding claw (11) has one end fixedly mounted on the locking rod (80) and the other end engaged with the contact track on the circuit board; A plurality of pairs of control signal contact pads (121) are arranged on the contact track.

14. The electronic lock according to claim 1, characterized in that: One end of the sliding claw is fixedly assembled on the locking rod (80) through a fixing groove. The lower housing (13) is fixed with a signal metal terminal (131) and a power metal terminal (133) by insert injection molding; Each pair of control signal contact pads of the circuit board is short-circuited with the signal metal terminals (131) of the lower housing respectively, for outputting different position signals; The power metal terminal (133) is used to be short-connected to the power input terminal of the motor and is connected to an external working power supply via a connector (135).

15. The electronic lock according to claim 1, characterized in that: The electronic lock further comprises an upper shell (14), and the upper shell (14) covers the lower shell (13).

16. A cam gear, characterized in that: The cam gear (7) includes a cam shaft (70) and a head gear (71); The camshaft (70) is formed with a spiral inner cam groove (72) and a spiral outer cam rib (73) coaxial with the camshaft; The inner cam groove (72) is recessed from the cam shaft (70) body column toward the axis side; The outer cam rib (73) protrudes from the camshaft (70) body column toward the side away from the axis; The head gear (71) is coaxially fixed to the head of the camshaft (70).

17. The cam gear (7) according to claim 16, characterized in that The helical angle of the outer cam rib (73) is greater than the helical angle of the inner cam groove (72).

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